/* roulang page: index */
:root {
            --color-primary: #0f172a;
            --color-primary-light: #1e293b;
            --color-accent: #c8a45c;
            --color-accent-hover: #b8923f;
            --color-accent-light: #f5ecd7;
            --color-tech: #3b82f6;
            --color-tech-light: #eff6ff;
            --color-bg: #ffffff;
            --color-bg-alt: #f8fafc;
            --color-bg-dark: #0f172a;
            --color-text: #1e293b;
            --color-text-soft: #475569;
            --color-text-muted: #94a3b8;
            --color-text-inverse: #ffffff;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #10b981;
            --color-warning: #f59e0b;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 50%;
            --shadow-xs: 0 1px 3px rgba(15, 23, 42, 0.04);
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
            --shadow-md: 0 6px 20px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 12px 36px rgba(15, 23, 42, 0.12);
            --shadow-xl: 0 20px 50px rgba(15, 23, 42, 0.16);
            --shadow-card: 0 2px 12px rgba(15, 23, 42, 0.05), 0 8px 28px rgba(15, 23, 42, 0.07);
            --shadow-btn: 0 4px 14px rgba(200, 164, 92, 0.3);
            --spacing-xs: 0.5rem;
            --spacing-sm: 0.75rem;
            --spacing-md: 1rem;
            --spacing-lg: 1.5rem;
            --spacing-xl: 2rem;
            --spacing-2xl: 3rem;
            --spacing-3xl: 4rem;
            --spacing-4xl: 5rem;
            --spacing-section: 5rem;
            --font-sans: 'PingFang SC', 'Noto Sans SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, -apple-system, 'Segoe UI', sans-serif;
            --font-mono: 'SF Mono', 'JetBrains Mono', 'Consolas', monospace;
            --font-size-xs: 0.75rem;
            --font-size-sm: 0.875rem;
            --font-size-base: 1rem;
            --font-size-md: 1.0625rem;
            --font-size-lg: 1.125rem;
            --font-size-xl: 1.25rem;
            --font-size-2xl: 1.5rem;
            --font-size-3xl: 1.875rem;
            --font-size-4xl: 2.25rem;
            --font-size-5xl: 2.75rem;
            --font-size-6xl: 3.25rem;
            --line-height-tight: 1.2;
            --line-height-snug: 1.4;
            --line-height-normal: 1.6;
            --line-height-relaxed: 1.75;
            --transition-fast: 0.18s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.4s cubic-bezier(0.25, 0.8, 0.25, 1.2);
            --max-width: 1200px;
            --max-width-narrow: 860px;
            --header-height: 64px;
            --z-header: 100;
            --z-overlay: 200;
            --z-modal: 300;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            font-size: 16px;
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: var(--font-size-base);
            line-height: var(--line-height-normal);
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
            min-height: 100vh;
        }

        img {
            display: block;
            max-width: 100%;
            height: auto;
            border: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            font-size: inherit;
            color: inherit;
            transition: all var(--transition-base);
        }
        button:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
        }

        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: transparent;
        }
        input:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 600;
            line-height: var(--line-height-tight);
            color: var(--color-primary);
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-xl);
        }
        .container--narrow {
            max-width: var(--max-width-narrow);
        }

        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

        /* ========== HEADER / NAV ========== */
        .header {
            position: sticky;
            top: 0;
            z-index: var(--z-header);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--color-border-light);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-base);
        }
        .header.scrolled {
            box-shadow: var(--shadow-sm);
        }

        .header__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-xl);
            gap: var(--spacing-lg);
        }

        .header__logo {
            flex-shrink: 0;
            font-size: var(--font-size-2xl);
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--color-primary);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .header__logo .logo-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: var(--radius-full);
            background: var(--color-accent);
            margin-left: 2px;
            animation: logoPulse 2s ease-in-out infinite;
        }
        @keyframes logoPulse {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.6);
            }
        }

        .header__nav {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
            flex-shrink: 0;
        }
        .header__nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 15px;
            border-radius: var(--radius-md);
            font-size: var(--font-size-sm);
            font-weight: 500;
            color: var(--color-text-soft);
            white-space: nowrap;
            transition: all var(--transition-fast);
            letter-spacing: 0.01em;
        }
        .header__nav a:hover {
            color: var(--color-primary);
            background: var(--color-bg-alt);
        }
        .header__nav a.active {
            color: var(--color-primary);
            background: var(--color-accent-light);
            font-weight: 600;
        }

        .header__right {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-shrink: 0;
        }

        .header__search {
            position: relative;
            display: flex;
            align-items: center;
        }
        .header__search input {
            width: 180px;
            padding: 9px 14px 9px 38px;
            border-radius: var(--radius-full);
            background: var(--color-bg-alt);
            border: 1px solid transparent;
            font-size: var(--font-size-sm);
            color: var(--color-text);
            transition: all var(--transition-base);
            letter-spacing: 0.01em;
        }
        .header__search input:focus {
            border-color: var(--color-accent);
            background: #fff;
            box-shadow: var(--shadow-xs);
            width: 220px;
        }
        .header__search input::placeholder {
            color: var(--color-text-muted);
        }
        .header__search .search-icon {
            position: absolute;
            left: 13px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--color-text-muted);
            font-size: var(--font-size-sm);
            pointer-events: none;
            transition: color var(--transition-fast);
        }
        .header__search input:focus~.search-icon {
            color: var(--color-accent);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 7px;
            padding: 10px 22px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: var(--font-size-sm);
            letter-spacing: 0.02em;
            white-space: nowrap;
            transition: all var(--transition-base);
            cursor: pointer;
        }
        .btn--primary {
            background: var(--color-accent);
            color: #fff;
            box-shadow: var(--shadow-btn);
        }
        .btn--primary:hover {
            background: var(--color-accent-hover);
            box-shadow: 0 6px 20px rgba(200, 164, 92, 0.4);
            transform: translateY(-1px);
        }
        .btn--primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        .btn--outline {
            border: 2px solid var(--color-border);
            color: var(--color-text);
            background: transparent;
        }
        .btn--outline:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
            background: var(--color-accent-light);
        }
        .btn--ghost {
            color: var(--color-text-soft);
            background: transparent;
            padding: 8px 14px;
        }
        .btn--ghost:hover {
            color: var(--color-primary);
            background: var(--color-bg-alt);
        }
        .btn--lg {
            padding: 13px 30px;
            font-size: var(--font-size-base);
            border-radius: var(--radius-xl);
        }

        .header__hamburger {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-md);
            background: var(--color-bg-alt);
            flex-shrink: 0;
            z-index: calc(var(--z-overlay) + 10);
        }
        .header__hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px;
            transition: all var(--transition-base);
            position: relative;
        }
        .header__hamburger span::before,
        .header__hamburger span::after {
            content: '';
            display: block;
            width: 20px;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px;
            position: absolute;
            left: 0;
            transition: all var(--transition-base);
        }
        .header__hamburger span::before {
            top: -7px;
        }
        .header__hamburger span::after {
            top: 7px;
        }
        .header__hamburger.active span {
            background: transparent;
        }
        .header__hamburger.active span::before {
            top: 0;
            transform: rotate(45deg);
        }
        .header__hamburger.active span::after {
            top: 0;
            transform: rotate(-45deg);
        }

        /* Mobile Nav */
        .mobile-nav {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: var(--z-overlay);
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: var(--spacing-xl);
            padding: var(--spacing-3xl);
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            font-size: var(--font-size-xl);
            font-weight: 600;
            color: var(--color-primary);
            padding: var(--spacing-sm) var(--spacing-lg);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
        }
        .mobile-nav a:hover,
        .mobile-nav a.active {
            color: var(--color-accent);
            background: var(--color-accent-light);
        }
        .mobile-nav .mobile-search {
            width: 100%;
            max-width: 320px;
        }
        .mobile-nav .mobile-search input {
            width: 100%;
            padding: 12px 18px 12px 44px;
            border-radius: var(--radius-full);
            background: var(--color-bg-alt);
            border: 1px solid var(--color-border);
            font-size: var(--font-size-base);
        }

        /* ========== HERO ========== */
        .hero {
            position: relative;
            padding: var(--spacing-4xl) 0;
            background: var(--color-bg-dark);
            color: var(--color-text-inverse);
            overflow: hidden;
            min-height: 600px;
            display: flex;
            align-items: center;
        }
        .hero__bg {
            position: absolute;
            inset: 0;
            background-image: url('assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.35;
            z-index: 0;
        }
        .hero__overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(160deg,
                    rgba(15, 23, 42, 0.88) 0%,
                    rgba(15, 23, 42, 0.6) 50%,
                    rgba(15, 23, 42, 0.82) 100%);
            z-index: 1;
        }
        .hero__content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }
        .hero__badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 7px 16px;
            border-radius: var(--radius-full);
            background: rgba(200, 164, 92, 0.18);
            border: 1px solid rgba(200, 164, 92, 0.3);
            color: var(--color-accent);
            font-size: var(--font-size-sm);
            font-weight: 500;
            letter-spacing: 0.04em;
            margin-bottom: var(--spacing-xl);
        }
        .hero__badge .badge-dot {
            width: 6px;
            height: 6px;
            border-radius: var(--radius-full);
            background: var(--color-accent);
            animation: logoPulse 2s ease-in-out infinite;
        }
        .hero h1 {
            font-size: var(--font-size-6xl);
            font-weight: 700;
            letter-spacing: -0.03em;
            color: #fff;
            line-height: var(--line-height-tight);
            margin-bottom: var(--spacing-lg);
        }
        .hero h1 .highlight {
            color: var(--color-accent);
            position: relative;
        }
        .hero__desc {
            font-size: var(--font-size-lg);
            color: rgba(255, 255, 255, 0.78);
            line-height: var(--line-height-relaxed);
            margin-bottom: var(--spacing-2xl);
            max-width: 560px;
        }
        .hero__actions {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-md);
        }
        .hero__stats-row {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-2xl);
            margin-top: var(--spacing-3xl);
            padding-top: var(--spacing-2xl);
            border-top: 1px solid rgba(255, 255, 255, 0.12);
        }
        .hero__stat {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .hero__stat .stat-num {
            font-size: var(--font-size-4xl);
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.02em;
            font-variant-numeric: tabular-nums;
            font-family: var(--font-mono);
        }
        .hero__stat .stat-label {
            font-size: var(--font-size-sm);
            color: rgba(255, 255, 255, 0.6);
            letter-spacing: 0.02em;
        }

        /* ========== SECTIONS ========== */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section--alt {
            background: var(--color-bg-alt);
        }
        .section--dark {
            background: var(--color-bg-dark);
            color: var(--color-text-inverse);
        }
        .section__header {
            text-align: center;
            margin-bottom: var(--spacing-3xl);
        }
        .section__header h2 {
            font-size: var(--font-size-4xl);
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: var(--spacing-md);
            color: inherit;
        }
        .section--dark .section__header h2 {
            color: #fff;
        }
        .section__header p {
            font-size: var(--font-size-lg);
            color: var(--color-text-soft);
            max-width: 560px;
            margin: 0 auto;
            line-height: var(--line-height-relaxed);
        }
        .section--dark .section__header p {
            color: rgba(255, 255, 255, 0.65);
        }
        .section__label {
            display: inline-block;
            font-size: var(--font-size-xs);
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--color-accent);
            margin-bottom: var(--spacing-sm);
        }

        /* Grid */
        .grid {
            display: grid;
            gap: var(--spacing-xl);
        }
        .grid--2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .grid--3 {
            grid-template-columns: repeat(3, 1fr);
        }
        .grid--4 {
            grid-template-columns: repeat(4, 1fr);
        }
        .grid--auto {
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        }

        /* ========== CARD ========== */
        .card {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-xs);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            box-shadow: var(--shadow-card);
            transform: translateY(-3px);
            border-color: var(--color-border);
        }
        .card__img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            background: var(--color-bg-alt);
        }
        .card__body {
            padding: var(--spacing-xl);
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .card__tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 10px;
            border-radius: var(--radius-full);
            font-size: var(--font-size-xs);
            font-weight: 600;
            letter-spacing: 0.03em;
            background: var(--color-accent-light);
            color: var(--color-accent);
            width: fit-content;
            white-space: nowrap;
        }
        .card__tag--tech {
            background: var(--color-tech-light);
            color: var(--color-tech);
        }
        .card h3 {
            font-size: var(--font-size-xl);
            font-weight: 600;
            color: var(--color-primary);
            line-height: var(--line-height-snug);
        }
        .card p {
            font-size: var(--font-size-sm);
            color: var(--color-text-soft);
            line-height: var(--line-height-relaxed);
            flex: 1;
        }
        .card__link {
            font-weight: 600;
            font-size: var(--font-size-sm);
            color: var(--color-accent);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--transition-fast);
            margin-top: auto;
        }
        .card__link:hover {
            gap: 8px;
            color: var(--color-accent-hover);
        }
        .card__link i {
            font-size: 10px;
        }

        /* ========== DATA BOARD ========== */
        .data-board {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
        }
        .data-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: var(--spacing-2xl) var(--spacing-xl);
            text-align: center;
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-xs);
            transition: all var(--transition-base);
        }
        .data-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .data-card__icon {
            width: 50px;
            height: 50px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto var(--spacing-md);
            font-size: 22px;
        }
        .data-card__icon--amber {
            background: #fef3c7;
            color: #d97706;
        }
        .data-card__icon--blue {
            background: #dbeafe;
            color: #2563eb;
        }
        .data-card__icon--green {
            background: #d1fae5;
            color: #059669;
        }
        .data-card__icon--purple {
            background: #ede9fe;
            color: #7c3aed;
        }
        .data-card__num {
            font-size: var(--font-size-4xl);
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: -0.02em;
            font-variant-numeric: tabular-nums;
            font-family: var(--font-mono);
        }
        .data-card__label {
            font-size: var(--font-size-sm);
            color: var(--color-text-soft);
            margin-top: var(--spacing-xs);
        }
        .data-card__trend {
            font-size: var(--font-size-xs);
            font-weight: 600;
            margin-top: 4px;
        }
        .data-card__trend.up {
            color: var(--color-success);
        }

        /* ========== BRAND MATRIX ========== */
        .brand-matrix {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
        }
        .brand-cell {
            aspect-ratio: 1 / 1;
            border-radius: var(--radius-lg);
            overflow: hidden;
            position: relative;
            cursor: pointer;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-xs);
        }
        .brand-cell:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }
        .brand-cell img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .brand-cell:hover img {
            transform: scale(1.06);
        }
        .brand-cell__label {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: var(--spacing-lg);
            background: linear-gradient(transparent, rgba(15, 23, 42, 0.85));
            color: #fff;
            font-weight: 600;
            font-size: var(--font-size-base);
            letter-spacing: 0.02em;
            z-index: 2;
        }
        .brand-cell__sub {
            font-size: var(--font-size-xs);
            font-weight: 400;
            opacity: 0.75;
            display: block;
            margin-top: 2px;
        }

        /* ========== NEWS LIST ========== */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 1px;
            background: var(--color-border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
        }
        .news-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--spacing-lg) var(--spacing-xl);
            background: #fff;
            gap: var(--spacing-lg);
            transition: all var(--transition-fast);
            cursor: pointer;
        }
        .news-item:hover {
            background: var(--color-bg-alt);
        }
        .news-item__left {
            display: flex;
            align-items: center;
            gap: var(--spacing-lg);
            flex: 1;
            min-width: 0;
        }
        .news-item__date {
            font-size: var(--font-size-xs);
            color: var(--color-text-muted);
            font-weight: 500;
            white-space: nowrap;
        }
        .news-item__title {
            font-weight: 500;
            color: var(--color-primary);
            font-size: var(--font-size-base);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .news-item__arrow {
            color: var(--color-text-muted);
            flex-shrink: 0;
            transition: all var(--transition-fast);
        }
        .news-item:hover .news-item__arrow {
            color: var(--color-accent);
            transform: translateX(3px);
        }

        /* ========== TECH ECOSYSTEM ========== */
        .tech-strip {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-md);
            justify-content: center;
        }
        .tech-pill {
            padding: 10px 20px;
            border-radius: var(--radius-full);
            background: #fff;
            border: 1px solid var(--color-border);
            font-weight: 500;
            font-size: var(--font-size-sm);
            color: var(--color-text-soft);
            transition: all var(--transition-base);
            cursor: pointer;
            white-space: nowrap;
        }
        .tech-pill:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
            background: var(--color-accent-light);
            box-shadow: var(--shadow-sm);
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            background: #fff;
            transition: all var(--transition-base);
        }
        .faq-item.active {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-sm);
        }
        .faq-item__q {
            width: 100%;
            padding: var(--spacing-lg) var(--spacing-xl);
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-weight: 600;
            font-size: var(--font-size-base);
            color: var(--color-primary);
            text-align: left;
            gap: var(--spacing-md);
            cursor: pointer;
            background: transparent;
            transition: all var(--transition-fast);
            letter-spacing: 0.01em;
        }
        .faq-item__q:hover {
            color: var(--color-accent);
            background: var(--color-accent-light);
        }
        .faq-item__icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: var(--radius-full);
            background: var(--color-bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-base);
            font-size: 12px;
            color: var(--color-text-soft);
        }
        .faq-item.active .faq-item__icon {
            background: var(--color-accent);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-item__a {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-base);
            padding: 0 var(--spacing-xl);
            font-size: var(--font-size-sm);
            color: var(--color-text-soft);
            line-height: var(--line-height-relaxed);
        }
        .faq-item.active .faq-item__a {
            max-height: 300px;
            padding-bottom: var(--spacing-lg);
        }

        /* ========== CTA ========== */
        .cta-block {
            background: var(--color-bg-dark);
            border-radius: var(--radius-xl);
            padding: var(--spacing-3xl) var(--spacing-3xl);
            text-align: center;
            position: relative;
            overflow: hidden;
            color: #fff;
        }
        .cta-block__bg {
            position: absolute;
            inset: 0;
            background-image: url('assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.2;
            z-index: 0;
        }
        .cta-block__content {
            position: relative;
            z-index: 1;
        }
        .cta-block h2 {
            font-size: var(--font-size-4xl);
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: var(--spacing-md);
        }
        .cta-block p {
            color: rgba(255, 255, 255, 0.7);
            font-size: var(--font-size-lg);
            margin-bottom: var(--spacing-2xl);
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-block .btn--primary {
            font-size: var(--font-size-base);
            padding: 14px 34px;
        }

        /* ========== FOOTER ========== */
        .footer {
            background: var(--color-bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: var(--spacing-4xl) 0 var(--spacing-2xl);
        }
        .footer__grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-2xl);
            margin-bottom: var(--spacing-3xl);
        }
        .footer__brand {
            font-size: var(--font-size-2xl);
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: var(--spacing-md);
        }
        .footer__desc {
            font-size: var(--font-size-sm);
            line-height: var(--line-height-relaxed);
            margin-bottom: var(--spacing-lg);
            max-width: 280px;
        }
        .footer h4 {
            font-size: var(--font-size-sm);
            font-weight: 600;
            color: #fff;
            letter-spacing: 0.04em;
            margin-bottom: var(--spacing-lg);
            text-transform: uppercase;
        }
        .footer ul {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .footer ul a {
            font-size: var(--font-size-sm);
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition-fast);
        }
        .footer ul a:hover {
            color: var(--color-accent);
        }
        .footer__bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: var(--spacing-xl);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: var(--spacing-md);
            font-size: var(--font-size-xs);
            color: rgba(255, 255, 255, 0.4);
        }
        .footer__bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer__bottom a:hover {
            color: var(--color-accent);
        }
        .footer__disclaimer {
            font-size: var(--font-size-xs);
            color: rgba(255, 255, 255, 0.35);
            max-width: 600px;
            line-height: var(--line-height-relaxed);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            :root {
                --font-size-6xl: 2.5rem;
                --font-size-4xl: 1.8rem;
                --font-size-3xl: 1.5rem;
                --spacing-section: 3.5rem;
                --spacing-4xl: 3rem;
            }
            .grid--4,
            .brand-matrix {
                grid-template-columns: repeat(2, 1fr);
            }
            .data-board {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--spacing-md);
            }
            .footer__grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-xl);
            }
            .hero {
                min-height: 500px;
                padding: var(--spacing-3xl) 0;
            }
            .hero__stats-row {
                gap: var(--spacing-xl);
            }
            .header__nav {
                gap: 0;
            }
            .header__nav a {
                padding: 6px 10px;
                font-size: var(--font-size-xs);
            }
            .header__search input {
                width: 140px;
            }
            .header__search input:focus {
                width: 160px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --font-size-6xl: 2rem;
                --font-size-4xl: 1.5rem;
                --font-size-3xl: 1.3rem;
                --font-size-2xl: 1.25rem;
                --spacing-section: 2.8rem;
                --spacing-4xl: 2.5rem;
                --spacing-3xl: 2rem;
                --header-height: 56px;
            }
            .container {
                padding: 0 var(--spacing-md);
            }
            .header__nav {
                display: none;
            }
            .header__search {
                display: none;
            }
            .header__hamburger {
                display: flex;
            }
            .header__right .btn--primary {
                display: none;
            }
            .header__right .btn--ghost {
                display: none;
            }
            .header__inner {
                padding: 0 var(--spacing-md);
            }
            .grid--2,
            .grid--3,
            .grid--4,
            .grid--auto,
            .brand-matrix {
                grid-template-columns: 1fr;
            }
            .data-board {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--spacing-sm);
            }
            .data-card {
                padding: var(--spacing-lg) var(--spacing-md);
            }
            .data-card__num {
                font-size: var(--font-size-2xl);
            }
            .hero {
                min-height: auto;
                padding: var(--spacing-3xl) 0;
                text-align: center;
            }
            .hero__content {
                max-width: 100%;
            }
            .hero h1 {
                font-size: var(--font-size-4xl);
            }
            .hero__desc {
                font-size: var(--font-size-base);
                max-width: 100%;
            }
            .hero__actions {
                justify-content: center;
            }
            .hero__stats-row {
                justify-content: center;
                gap: var(--spacing-lg);
            }
            .hero__stat .stat-num {
                font-size: var(--font-size-2xl);
            }
            .footer__grid {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .footer__desc {
                max-width: 100%;
            }
            .footer__bottom {
                flex-direction: column;
                text-align: center;
            }
            .news-item {
                flex-direction: column;
                align-items: flex-start;
                gap: var(--spacing-sm);
            }
            .cta-block {
                padding: var(--spacing-2xl) var(--spacing-lg);
            }
            .cta-block h2 {
                font-size: var(--font-size-2xl);
            }
            .section__header h2 {
                font-size: var(--font-size-3xl);
            }
            .card__body {
                padding: var(--spacing-lg);
            }
            .tech-strip {
                gap: var(--spacing-sm);
            }
            .tech-pill {
                padding: 8px 14px;
                font-size: var(--font-size-xs);
            }
            .header__logo {
                font-size: var(--font-size-xl);
            }
        }

        @media (max-width: 520px) {
            :root {
                --font-size-6xl: 1.6rem;
                --font-size-4xl: 1.3rem;
                --font-size-3xl: 1.15rem;
                --spacing-section: 2.2rem;
                --spacing-3xl: 1.5rem;
                --spacing-2xl: 1.2rem;
            }
            .data-board {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .data-card {
                padding: var(--spacing-md);
                border-radius: var(--radius-md);
            }
            .data-card__num {
                font-size: var(--font-size-xl);
            }
            .data-card__icon {
                width: 36px;
                height: 36px;
                font-size: 16px;
                border-radius: var(--radius-sm);
            }
            .hero h1 {
                font-size: var(--font-size-3xl);
            }
            .hero__stats-row {
                gap: var(--spacing-md);
                flex-wrap: wrap;
                justify-content: flex-start;
            }
            .hero__stat .stat-num {
                font-size: var(--font-size-xl);
            }
            .btn--lg {
                padding: 11px 22px;
                font-size: var(--font-size-sm);
            }
            .brand-cell__label {
                font-size: var(--font-size-sm);
                padding: var(--spacing-md);
            }
            .news-item__left {
                gap: var(--spacing-sm);
            }
            .faq-item__q {
                padding: var(--spacing-md);
                font-size: var(--font-size-sm);
            }
            .faq-item__a {
                padding: 0 var(--spacing-md);
                font-size: var(--font-size-xs);
            }
            .faq-item.active .faq-item__a {
                padding-bottom: var(--spacing-md);
            }
            .header__inner {
                padding: 0 var(--spacing-sm);
            }
            .header__logo {
                font-size: var(--font-size-lg);
            }
        }

/* roulang page: category3 */
:root {
            --color-primary: #1a56db;
            --color-primary-dark: #1240a0;
            --color-primary-light: #e8f0fe;
            --color-accent: #0ea5e9;
            --color-accent-dark: #0284c7;
            --color-bg: #f8fafc;
            --color-surface: #ffffff;
            --color-text: #1e293b;
            --color-text-weak: #64748b;
            --color-text-muted: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #10b981;
            --color-warning: #f59e0b;
            --color-error: #ef4444;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.10);
            --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.12);
            --spacing-xs: 6px;
            --spacing-sm: 12px;
            --spacing-md: 20px;
            --spacing-lg: 28px;
            --spacing-xl: 40px;
            --spacing-2xl: 56px;
            --spacing-3xl: 72px;
            --spacing-4xl: 96px;
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --font-mono: 'JetBrains Mono', 'SF Mono', 'Consolas', 'Monaco', monospace;
            --max-width: 1200px;
            --nav-height: 64px;
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            line-height: 1.65;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            letter-spacing: 0.01em;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            font-size: inherit;
        }
        input {
            font-family: inherit;
            font-size: inherit;
        }
        ul {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: var(--spacing-md);
            padding-right: var(--spacing-md);
        }

        /* ========== HEADER / NAV ========== */
        .header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            height: var(--nav-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-base);
        }
        .header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .header__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-lg);
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: var(--spacing-md);
            padding-right: var(--spacing-md);
        }
        .header__logo {
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--color-primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
            flex-shrink: 0;
            transition: color var(--transition-fast);
        }
        .header__logo:hover {
            color: var(--color-primary-dark);
        }
        .header__nav {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
            flex-wrap: nowrap;
        }
        .header__nav a {
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-weak);
            white-space: nowrap;
            transition: all var(--transition-fast);
            letter-spacing: 0.01em;
        }
        .header__nav a:hover {
            color: var(--color-primary);
            background: var(--color-primary-light);
        }
        .header__nav a.active {
            color: var(--color-primary);
            background: var(--color-primary-light);
            font-weight: 600;
        }
        .header__actions {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-shrink: 0;
        }
        .header__search {
            display: flex;
            align-items: center;
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-full);
            padding: 7px 14px;
            gap: 8px;
            transition: all var(--transition-fast);
        }
        .header__search:focus-within {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.08);
        }
        .header__search input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.85rem;
            width: 140px;
            color: var(--color-text);
        }
        .header__search input::placeholder {
            color: var(--color-text-muted);
        }
        .header__search-icon {
            color: var(--color-text-weak);
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.9rem;
            letter-spacing: 0.01em;
            transition: all var(--transition-base);
            white-space: nowrap;
            text-align: center;
        }
        .btn--primary {
            background: var(--color-primary);
            color: #fff;
            border: 2px solid var(--color-primary);
        }
        .btn--primary:hover {
            background: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .btn--primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-xs);
        }
        .btn--outline {
            background: transparent;
            color: var(--color-primary);
            border: 2px solid var(--color-primary);
        }
        .btn--outline:hover {
            background: var(--color-primary-light);
            box-shadow: var(--shadow-sm);
        }
        .btn--lg {
            padding: 13px 28px;
            font-size: 1rem;
            border-radius: var(--radius-md);
        }
        .header__menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }
        .header__menu-toggle:hover {
            background: var(--color-primary-light);
        }
        .header__menu-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--color-text);
            border-radius: 2px;
            transition: all var(--transition-base);
            transform-origin: center;
        }
        .header__menu-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .header__menu-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .header__menu-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ========== PAGE BANNER ========== */
        .page-banner {
            position: relative;
            padding: var(--spacing-3xl) 0 var(--spacing-2xl);
            background: linear-gradient(135deg, #0f1d3d 0%, #1a3a6b 30%, #1a56db 70%, #0ea5e9 100%);
            background-image: url('assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            color: #ffffff;
            text-align: center;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(14, 165, 233, 0.25) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 20%, rgba(26, 86, 219, 0.3) 0%, transparent 55%);
            pointer-events: none;
        }
        .page-banner__content {
            position: relative;
            z-index: 1;
            max-width: 750px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }
        .page-banner__badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #e0f0ff;
            padding: 6px 16px;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.03em;
            margin-bottom: var(--spacing-md);
        }
        .page-banner__title {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1.2;
            margin-bottom: var(--spacing-md);
        }
        .page-banner__desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
            max-width: 560px;
            margin: 0 auto var(--spacing-lg);
        }
        .page-banner__stats {
            display: flex;
            justify-content: center;
            gap: var(--spacing-2xl);
            flex-wrap: wrap;
            margin-top: var(--spacing-lg);
        }
        .page-banner__stat {
            text-align: center;
        }
        .page-banner__stat-value {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: #ffffff;
        }
        .page-banner__stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 2px;
        }

        /* ========== MAIN CONTENT ========== */
        .main {
            flex: 1;
        }
        .section {
            padding: var(--spacing-3xl) 0;
        }
        .section--light {
            background: var(--color-surface);
        }
        .section--gray {
            background: var(--color-bg);
        }
        .section__header {
            text-align: center;
            max-width: 680px;
            margin: 0 auto var(--spacing-2xl);
        }
        .section__label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--color-primary);
            background: var(--color-primary-light);
            padding: 5px 14px;
            border-radius: var(--radius-full);
            margin-bottom: var(--spacing-sm);
        }
        .section__title {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--color-text);
            margin-bottom: var(--spacing-sm);
            line-height: 1.25;
        }
        .section__desc {
            font-size: 1.05rem;
            color: var(--color-text-weak);
            line-height: 1.7;
        }

        /* ========== CARDS GRID ========== */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
            gap: var(--spacing-lg);
        }
        .card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: var(--spacing-xl);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            border-color: transparent;
            transform: translateY(-3px);
        }
        .card__icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            flex-shrink: 0;
        }
        .card__icon--blue {
            background: #e8f0fe;
            color: #1a56db;
        }
        .card__icon--teal {
            background: #e6f7f5;
            color: #0d9488;
        }
        .card__icon--purple {
            background: #f0ebfa;
            color: #7c3aed;
        }
        .card__icon--orange {
            background: #fff7ed;
            color: #ea580c;
        }
        .card__icon--cyan {
            background: #e6f5fb;
            color: #0ea5e9;
        }
        .card__icon--green {
            background: #ecfdf5;
            color: #10b981;
        }
        .card__title {
            font-size: 1.15rem;
            font-weight: 650;
            letter-spacing: -0.01em;
            color: var(--color-text);
            margin: 0;
        }
        .card__desc {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            line-height: 1.6;
            margin: 0;
        }
        .card__img {
            width: 100%;
            border-radius: var(--radius-md);
            object-fit: cover;
            aspect-ratio: 16/10;
            margin-bottom: var(--spacing-xs);
        }
        .card__tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: var(--radius-full);
            background: var(--color-primary-light);
            color: var(--color-primary);
            letter-spacing: 0.02em;
        }

        /* ========== SERVICE MATRIX ========== */
        .service-matrix {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-lg);
        }
        .service-matrix__item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: var(--spacing-xl);
            display: flex;
            gap: var(--spacing-lg);
            align-items: flex-start;
            transition: all var(--transition-base);
        }
        .service-matrix__item:hover {
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }
        .service-matrix__img {
            width: 100px;
            height: 100px;
            border-radius: var(--radius-md);
            object-fit: cover;
            flex-shrink: 0;
        }
        .service-matrix__info h4 {
            font-size: 1.1rem;
            font-weight: 650;
            margin-bottom: 4px;
            color: var(--color-text);
        }
        .service-matrix__info p {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            line-height: 1.6;
        }
        .service-matrix__info .card__tag {
            margin-top: var(--spacing-xs);
        }

        /* ========== DATA STATS BAR ========== */
        .stats-bar {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
        }
        .stat-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: var(--spacing-xl);
            text-align: center;
            transition: all var(--transition-base);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-md);
            border-color: transparent;
            transform: translateY(-2px);
        }
        .stat-card__value {
            font-size: 2.4rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            color: var(--color-primary);
            font-family: var(--font-mono);
        }
        .stat-card__label {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            margin-top: 4px;
        }
        .stat-card__trend {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--color-success);
            margin-top: 2px;
        }

        /* ========== TECH HIGHLIGHT ========== */
        .tech-highlight {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-2xl);
            align-items: center;
        }
        .tech-highlight__img {
            border-radius: var(--radius-lg);
            object-fit: cover;
            aspect-ratio: 4/3;
            width: 100%;
            box-shadow: var(--shadow-lg);
        }
        .tech-highlight__content h3 {
            font-size: 1.6rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: var(--spacing-md);
            color: var(--color-text);
        }
        .tech-highlight__content p {
            font-size: 1rem;
            color: var(--color-text-weak);
            line-height: 1.7;
            margin-bottom: var(--spacing-sm);
        }
        .tech-highlight__list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
            margin-top: var(--spacing-md);
        }
        .tech-highlight__list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.95rem;
            color: var(--color-text);
        }
        .tech-highlight__list li::before {
            content: '';
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-accent);
            flex-shrink: 0;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .faq-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-xs);
        }
        .faq-item__question {
            width: 100%;
            text-align: left;
            padding: var(--spacing-md) var(--spacing-lg);
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--color-text);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: var(--spacing-md);
            transition: color var(--transition-fast);
            cursor: pointer;
            background: none;
            border: none;
            font-family: inherit;
        }
        .faq-item__question:hover {
            color: var(--color-primary);
        }
        .faq-item__icon {
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: var(--color-border-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            color: var(--color-text-weak);
            transition: all var(--transition-base);
        }
        .faq-item.open .faq-item__icon {
            transform: rotate(45deg);
            background: var(--color-primary-light);
            color: var(--color-primary);
        }
        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            padding: 0 var(--spacing-lg);
            font-size: 0.9rem;
            color: var(--color-text-weak);
            line-height: 1.7;
        }
        .faq-item.open .faq-item__answer {
            max-height: 300px;
            padding-bottom: var(--spacing-md);
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: linear-gradient(135deg, #0f1d3d 0%, #1a3a6b 50%, #1a56db 100%);
            background-image: url('assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            color: #ffffff;
            text-align: center;
            padding: var(--spacing-3xl) 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 30%, rgba(14, 165, 233, 0.2) 0%, transparent 55%);
            pointer-events: none;
        }
        .cta-section__inner {
            position: relative;
            z-index: 1;
            max-width: 600px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }
        .cta-section__title {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: var(--spacing-sm);
        }
        .cta-section__desc {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: var(--spacing-lg);
            line-height: 1.6;
        }
        .cta-section .btn--primary {
            background: #ffffff;
            color: var(--color-primary);
            border-color: #ffffff;
            font-weight: 700;
        }
        .cta-section .btn--primary:hover {
            background: #e8f0fe;
            border-color: #e8f0fe;
            color: var(--color-primary-dark);
            box-shadow: var(--shadow-lg);
        }

        /* ========== FOOTER ========== */
        .footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: var(--spacing-2xl) 0 var(--spacing-lg);
            font-size: 0.9rem;
        }
        .footer a {
            color: #cbd5e1;
            transition: color var(--transition-fast);
        }
        .footer a:hover {
            color: #ffffff;
        }
        .footer__grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: var(--spacing-xl);
            margin-bottom: var(--spacing-xl);
        }
        .footer__brand {
            font-weight: 700;
            font-size: 1.3rem;
            color: #ffffff;
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.02em;
        }
        .footer__desc {
            color: #94a3b8;
            line-height: 1.6;
            font-size: 0.85rem;
            margin-bottom: var(--spacing-sm);
        }
        .footer h4 {
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: #e2e8f0;
            margin-bottom: var(--spacing-sm);
        }
        .footer ul {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .footer ul li a {
            font-size: 0.85rem;
        }
        .footer__bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: var(--spacing-md);
            padding-top: var(--spacing-md);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.8rem;
            color: #64748b;
        }
        .footer__bottom a {
            color: #94a3b8;
            font-size: 0.8rem;
        }
        .footer__bottom a:hover {
            color: #e2e8f0;
        }
        .footer__disclaimer {
            font-size: 0.78rem;
            color: #64748b;
            line-height: 1.6;
            text-align: center;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .header__search input {
                width: 100px;
            }
            .header__nav a {
                padding: 6px 10px;
                font-size: 0.82rem;
            }
            .page-banner__title {
                font-size: 2rem;
            }
            .service-matrix {
                grid-template-columns: 1fr;
            }
            .tech-highlight {
                grid-template-columns: 1fr;
                gap: var(--spacing-xl);
            }
            .tech-highlight__img {
                aspect-ratio: 16/9;
                max-height: 350px;
            }
            .stats-bar {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer__grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-lg);
            }
            .cards-grid {
                grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
            }
        }

        @media (max-width: 768px) {
            .header__nav {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: #ffffff;
                flex-direction: column;
                padding: var(--spacing-md);
                gap: 4px;
                border-bottom: 1px solid var(--color-border);
                box-shadow: var(--shadow-lg);
                z-index: 999;
            }
            .header__nav.open {
                display: flex;
            }
            .header__nav a {
                width: 100%;
                padding: 10px 14px;
                border-radius: var(--radius-sm);
                font-size: 0.9rem;
            }
            .header__menu-toggle {
                display: flex;
            }
            .header__search {
                display: none;
            }
            .header__actions .btn--outline {
                display: none;
            }
            .page-banner {
                padding: var(--spacing-2xl) 0 var(--spacing-xl);
            }
            .page-banner__title {
                font-size: 1.6rem;
            }
            .page-banner__desc {
                font-size: 0.95rem;
            }
            .page-banner__stats {
                gap: var(--spacing-lg);
            }
            .page-banner__stat-value {
                font-size: 1.5rem;
            }
            .section {
                padding: var(--spacing-2xl) 0;
            }
            .section__title {
                font-size: 1.5rem;
            }
            .cards-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-md);
            }
            .service-matrix__item {
                flex-direction: column;
                gap: var(--spacing-sm);
            }
            .service-matrix__img {
                width: 100%;
                height: 160px;
                aspect-ratio: 16/9;
            }
            .stats-bar {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-md);
            }
            .stat-card__value {
                font-size: 1.8rem;
            }
            .tech-highlight__list li {
                font-size: 0.9rem;
            }
            .cta-section__title {
                font-size: 1.5rem;
            }
            .footer__grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }
            .footer__bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .header__logo {
                font-size: 1.15rem;
            }
            .header__actions .btn {
                padding: 8px 14px;
                font-size: 0.8rem;
            }
            .page-banner__title {
                font-size: 1.35rem;
            }
            .page-banner__badge {
                font-size: 0.75rem;
            }
            .cards-grid {
                grid-template-columns: 1fr;
            }
            .stats-bar {
                grid-template-columns: 1fr;
            }
            .section__title {
                font-size: 1.3rem;
            }
            .cta-section__title {
                font-size: 1.3rem;
            }
            .card {
                padding: var(--spacing-md);
            }
            .stat-card {
                padding: var(--spacing-md);
            }
        }

        @media (min-width: 769px) {
            .header__nav {
                display: flex !important;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #1a56db;
            --color-primary-hover: #1647b8;
            --color-primary-light: #e8f0fe;
            --color-accent: #0ea5e9;
            --color-accent-light: #e0f7ff;
            --color-surface: #ffffff;
            --color-bg: #f8fafc;
            --color-bg-alt: #f1f5f9;
            --color-dark: #0f172a;
            --color-dark-secondary: #1e293b;
            --color-text: #1e293b;
            --color-text-secondary: #475569;
            --color-text-muted: #64748b;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #10b981;
            --color-warning: #f59e0b;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.09), 0 4px 8px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.12), 0 8px 16px rgba(0, 0, 0, 0.06);
            --spacing-xs: 4px;
            --spacing-sm: 8px;
            --spacing-md: 16px;
            --spacing-lg: 24px;
            --spacing-xl: 32px;
            --spacing-2xl: 48px;
            --spacing-3xl: 64px;
            --spacing-4xl: 80px;
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', 'Consolas', monospace;
            --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 64px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.65;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            text-rendering: optimizeLegibility;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        a:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
            font-size: inherit;
        }
        button:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }

        input {
            font-family: inherit;
            font-size: inherit;
        }
        input:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
        }

        ul {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
        }

        /* Header */
        .header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-base);
        }
        .header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .header__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-lg);
            height: 100%;
        }
        .header__logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-dark);
            letter-spacing: -0.02em;
            white-space: nowrap;
            flex-shrink: 0;
            transition: color var(--transition-fast);
        }
        .header__logo:hover {
            color: var(--color-primary);
        }
        .header__nav {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
            flex-wrap: nowrap;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .header__nav::-webkit-scrollbar {
            display: none;
        }
        .header__nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            white-space: nowrap;
            transition: all var(--transition-fast);
            position: relative;
        }
        .header__nav a:hover {
            color: var(--color-primary);
            background: var(--color-primary-light);
        }
        .header__nav a.active {
            color: var(--color-primary);
            background: var(--color-primary-light);
            font-weight: 600;
        }
        .header__nav a.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px 2px 0 0;
        }
        .header__actions {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            flex-shrink: 0;
        }
        .header__search {
            position: relative;
        }
        .header__search input {
            width: 200px;
            padding: 9px 14px 9px 36px;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-full);
            font-size: 0.875rem;
            background: var(--color-bg);
            color: var(--color-text);
            transition: all var(--transition-fast);
        }
        .header__search input::placeholder {
            color: var(--color-text-muted);
        }
        .header__search input:focus {
            border-color: var(--color-primary);
            background: var(--color-surface);
            box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.08);
            width: 240px;
        }
        .header__search-icon {
            position: absolute;
            left: 12px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--color-text-muted);
            pointer-events: none;
            font-size: 0.85rem;
        }
        .header__cta {
            display: inline-flex;
            align-items: center;
            padding: 9px 20px;
            background: var(--color-primary);
            color: #fff;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.875rem;
            white-space: nowrap;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-xs);
        }
        .header__cta:hover {
            background: var(--color-primary-hover);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .header__cta:active {
            transform: translateY(0);
            box-shadow: var(--shadow-xs);
        }
        .header__hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            z-index: 110;
            flex-shrink: 0;
        }
        .header__hamburger span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--color-dark);
            border-radius: 2px;
            transition: all var(--transition-fast);
        }
        .header__hamburger.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .header__hamburger.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .header__hamburger.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Breadcrumb */
        .breadcrumb {
            padding: var(--spacing-md) 0;
            font-size: 0.85rem;
            color: var(--color-text-muted);
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--color-primary);
        }
        .breadcrumb .separator {
            color: var(--color-border);
            user-select: none;
        }
        .breadcrumb .current {
            color: var(--color-text);
            font-weight: 500;
        }

        /* Hero / Banner */
        .page-hero {
            position: relative;
            padding: var(--spacing-4xl) 0 var(--spacing-3xl);
            background-image: url('assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            color: #fff;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.82) 0%, rgba(15, 23, 42, 0.55) 40%, rgba(26, 86, 219, 0.35) 100%);
            z-index: 1;
        }
        .page-hero__content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }
        .page-hero__badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.18);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 6px 14px;
            border-radius: var(--radius-full);
            font-size: 0.8rem;
            font-weight: 500;
            letter-spacing: 0.04em;
            margin-bottom: var(--spacing-lg);
            backdrop-filter: blur(8px);
        }
        .page-hero__title {
            font-size: 2.8rem;
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.03em;
            margin-bottom: var(--spacing-md);
        }
        .page-hero__desc {
            font-size: 1.15rem;
            line-height: 1.7;
            opacity: 0.9;
            max-width: 560px;
            margin-bottom: var(--spacing-xl);
        }
        .page-hero__actions {
            display: flex;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            cursor: pointer;
            white-space: nowrap;
        }
        .btn--primary {
            background: #fff;
            color: var(--color-dark);
            box-shadow: var(--shadow-sm);
        }
        .btn--primary:hover {
            background: #f1f5f9;
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .btn--primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-xs);
        }
        .btn--outline-light {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.5);
        }
        .btn--outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.8);
            transform: translateY(-2px);
        }
        .btn--outline-light:active {
            transform: translateY(0);
        }
        .btn--primary-solid {
            background: var(--color-primary);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }
        .btn--primary-solid:hover {
            background: var(--color-primary-hover);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .btn--primary-solid:active {
            transform: translateY(0);
            box-shadow: var(--shadow-xs);
        }

        /* Section */
        .section {
            padding: var(--spacing-3xl) 0;
        }
        .section--alt {
            background: var(--color-bg-alt);
        }
        .section__header {
            text-align: center;
            margin-bottom: var(--spacing-2xl);
        }
        .section__label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--color-primary);
            background: var(--color-primary-light);
            padding: 5px 14px;
            border-radius: var(--radius-full);
            margin-bottom: var(--spacing-md);
        }
        .section__title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-dark);
            letter-spacing: -0.02em;
            margin-bottom: var(--spacing-sm);
            line-height: 1.25;
        }
        .section__subtitle {
            font-size: 1.05rem;
            color: var(--color-text-secondary);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }

        /* Card Grid */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }
        .card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-xs);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--color-border);
        }
        .card__image {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }
        .card__body {
            padding: var(--spacing-lg);
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card__tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--color-primary);
            background: var(--color-primary-light);
            padding: 3px 10px;
            border-radius: var(--radius-full);
            margin-bottom: var(--spacing-sm);
            align-self: flex-start;
        }
        .card__title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: var(--spacing-sm);
            line-height: 1.35;
            letter-spacing: -0.01em;
        }
        .card__desc {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.55;
            flex: 1;
            margin-bottom: var(--spacing-md);
        }
        .card__link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 0.875rem;
            color: var(--color-primary);
            transition: gap var(--transition-fast);
        }
        .card__link:hover {
            gap: 10px;
            color: var(--color-primary-hover);
        }
        .card__link .arrow {
            transition: transform var(--transition-fast);
        }
        .card__link:hover .arrow {
            transform: translateX(3px);
        }

        /* Stats */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
        }
        .stat-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: var(--spacing-xl) var(--spacing-lg);
            text-align: center;
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-xs);
            transition: all var(--transition-base);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .stat-card__icon {
            font-size: 2rem;
            margin-bottom: var(--spacing-sm);
            display: block;
        }
        .stat-card__value {
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--color-dark);
            letter-spacing: -0.02em;
            margin-bottom: var(--spacing-xs);
            line-height: 1;
        }
        .stat-card__label {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            font-weight: 500;
        }

        /* Steps / Process */
        .steps-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
            counter-reset: step;
        }
        .step-item {
            position: relative;
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: var(--spacing-xl) var(--spacing-lg);
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-xs);
            text-align: center;
            transition: all var(--transition-base);
            counter-increment: step;
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .step-item__num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            background: var(--color-primary);
            color: #fff;
            font-weight: 700;
            font-size: 1.2rem;
            border-radius: var(--radius-full);
            margin-bottom: var(--spacing-md);
            box-shadow: 0 4px 14px rgba(26, 86, 219, 0.3);
        }
        .step-item__title {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--color-dark);
            margin-bottom: var(--spacing-sm);
        }
        .step-item__desc {
            font-size: 0.875rem;
            color: var(--color-text-secondary);
            line-height: 1.5;
        }
        .step-connector {
            display: none;
        }

        /* Featured Block */
        .featured-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-3xl);
            align-items: center;
        }
        .featured-block__image {
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            aspect-ratio: 4 / 3;
            object-fit: cover;
            width: 100%;
        }
        .featured-block__content h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: var(--spacing-md);
            letter-spacing: -0.02em;
            line-height: 1.3;
        }
        .featured-block__content p {
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin-bottom: var(--spacing-md);
        }
        .featured-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
            margin-bottom: var(--spacing-lg);
        }
        .featured-list__item {
            display: flex;
            align-items: flex-start;
            gap: var(--spacing-md);
            padding: var(--spacing-md);
            background: var(--color-bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
        }
        .featured-list__item:hover {
            background: var(--color-surface);
            box-shadow: var(--shadow-sm);
        }
        .featured-list__icon {
            flex-shrink: 0;
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--color-primary-light);
            color: var(--color-primary);
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
        }
        .featured-list__text strong {
            display: block;
            font-size: 0.95rem;
            color: var(--color-dark);
            margin-bottom: 2px;
        }
        .featured-list__text span {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            line-height: 1.45;
        }

        /* FAQ */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }
        .faq-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--color-border);
            box-shadow: var(--shadow-sm);
        }
        .faq-item__trigger {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-md);
            padding: var(--spacing-lg);
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--color-dark);
            text-align: left;
            cursor: pointer;
            transition: color var(--transition-fast);
            background: none;
            border: none;
        }
        .faq-item__trigger:hover {
            color: var(--color-primary);
        }
        .faq-item__icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: var(--radius-full);
            background: var(--color-bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
            font-size: 1.1rem;
            color: var(--color-text-muted);
            font-weight: 700;
            line-height: 1;
        }
        .faq-item.open .faq-item__icon {
            background: var(--color-primary);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-item__body {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
        }
        .faq-item.open .faq-item__body {
            max-height: 400px;
        }
        .faq-item__body-inner {
            padding: 0 var(--spacing-lg) var(--spacing-lg);
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }

        /* CTA Section */
        .cta-section {
            padding: var(--spacing-4xl) 0;
            text-align: center;
            background: var(--color-dark);
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(26, 86, 219, 0.25) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 30%, rgba(14, 165, 233, 0.18) 0%, transparent 55%);
            pointer-events: none;
        }
        .cta-section__content {
            position: relative;
            z-index: 1;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-section__title {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: var(--spacing-md);
            line-height: 1.25;
        }
        .cta-section__desc {
            font-size: 1.05rem;
            opacity: 0.85;
            margin-bottom: var(--spacing-xl);
            line-height: 1.6;
        }
        .btn--light-lg {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: #fff;
            color: var(--color-dark);
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-md);
        }
        .btn--light-lg:hover {
            background: #f1f5f9;
            box-shadow: var(--shadow-xl);
            transform: translateY(-2px);
        }
        .btn--light-lg:active {
            transform: translateY(0);
        }

        /* Footer */
        .footer {
            background: var(--color-dark-secondary);
            color: #cbd5e1;
            padding: var(--spacing-3xl) 0 var(--spacing-lg);
            font-size: 0.9rem;
        }
        .footer__grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: var(--spacing-2xl);
            margin-bottom: var(--spacing-2xl);
        }
        .footer__brand {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.02em;
        }
        .footer__desc {
            color: #94a3b8;
            line-height: 1.6;
            font-size: 0.875rem;
        }
        .footer h4 {
            color: #e2e8f0;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.02em;
        }
        .footer ul {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .footer ul a {
            color: #94a3b8;
            transition: color var(--transition-fast);
        }
        .footer ul a:hover {
            color: #fff;
        }
        .footer__bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: var(--spacing-md);
            padding-top: var(--spacing-lg);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.8rem;
            color: #94a3b8;
        }
        .footer__bottom a {
            color: #94a3b8;
            transition: color var(--transition-fast);
        }
        .footer__bottom a:hover {
            color: #fff;
        }
        .footer__disclaimer {
            font-size: 0.78rem;
            color: #64748b;
            line-height: 1.5;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .featured-block {
                grid-template-columns: 1fr;
                gap: var(--spacing-xl);
            }
            .footer__grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-xl);
            }
            .page-hero__title {
                font-size: 2.2rem;
            }
            .header__search input {
                width: 150px;
            }
            .header__search input:focus {
                width: 180px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 56px;
            }
            .header__hamburger {
                display: flex;
            }
            .header__nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: var(--spacing-lg);
                gap: var(--spacing-xs);
                border-bottom: 1px solid var(--color-border);
                box-shadow: var(--shadow-lg);
                transform: translateY(-110%);
                opacity: 0;
                transition: all var(--transition-base);
                z-index: 99;
                max-height: 70vh;
                overflow-y: auto;
                align-items: stretch;
            }
            .header__nav.open {
                transform: translateY(0);
                opacity: 1;
            }
            .header__nav a {
                padding: 12px 16px;
                font-size: 0.95rem;
                border-radius: var(--radius-md);
                justify-content: flex-start;
            }
            .header__nav a.active::after {
                display: none;
            }
            .header__nav a.active {
                border-left: 3px solid var(--color-primary);
            }
            .header__actions {
                gap: var(--spacing-sm);
            }
            .header__search {
                display: none;
            }
            .header__search-mobile {
                display: block;
                width: 100%;
                margin-bottom: var(--spacing-sm);
            }
            .header__search-mobile input {
                width: 100%;
                padding: 10px 14px 10px 36px;
                border: 1px solid var(--color-border);
                border-radius: var(--radius-md);
                font-size: 0.9rem;
                background: var(--color-bg);
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--spacing-md);
            }
            .steps-list {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .featured-block {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }
            .footer__grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-xl);
            }
            .footer__bottom {
                flex-direction: column;
                text-align: center;
            }
            .page-hero {
                padding: var(--spacing-2xl) 0 var(--spacing-xl);
            }
            .page-hero__title {
                font-size: 1.7rem;
            }
            .page-hero__desc {
                font-size: 1rem;
            }
            .section {
                padding: var(--spacing-2xl) 0;
            }
            .section__title {
                font-size: 1.5rem;
            }
            .cta-section__title {
                font-size: 1.5rem;
            }
            .stat-card__value {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 var(--spacing-md);
            }
            .page-hero__title {
                font-size: 1.4rem;
            }
            .page-hero__actions {
                flex-direction: column;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-sm);
            }
            .stat-card {
                padding: var(--spacing-md);
            }
            .stat-card__value {
                font-size: 1.5rem;
            }
            .stat-card__label {
                font-size: 0.78rem;
            }
            .section__title {
                font-size: 1.3rem;
            }
            .featured-block__content h3 {
                font-size: 1.3rem;
            }
        }

/* roulang page: category2 */
:root {
            --color-primary: #0f2b45;
            --color-primary-light: #1a4a7a;
            --color-accent: #2563eb;
            --color-accent-glow: #3b82f6;
            --color-teal: #0891b2;
            --color-bg: #ffffff;
            --color-bg-alt: #f1f5f9;
            --color-bg-soft: #f8fafc;
            --color-bg-dark: #0b1e33;
            --color-bg-card: #ffffff;
            --color-text: #1e293b;
            --color-text-heading: #0f172a;
            --color-text-muted: #64748b;
            --color-text-light: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #059669;
            --color-warning: #d97706;
            --radius-xs: 4px;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.09), 0 4px 8px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.12), 0 8px 16px rgba(0, 0, 0, 0.05);
            --shadow-glow: 0 0 0 3px rgba(37, 99, 235, 0.15);
            --spacing-xs: 0.5rem;
            --spacing-sm: 0.75rem;
            --spacing-md: 1rem;
            --spacing-lg: 1.5rem;
            --spacing-xl: 2rem;
            --spacing-2xl: 3rem;
            --spacing-3xl: 4rem;
            --spacing-section: 5rem;
            --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            text-rendering: optimizeLegibility;
        }

        body {
            font-family: var(--font-sans);
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            font-size: 16px;
            letter-spacing: 0.01em;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: var(--radius-xs);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            font-size: inherit;
        }
        button:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }
        input {
            font-family: inherit;
            font-size: inherit;
        }
        ul {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 var(--spacing-md);
            }
        }

        /* Header */
        .header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border-light);
            padding: 0 var(--spacing-lg);
            transition: box-shadow var(--transition-base);
        }
        .header--scrolled {
            box-shadow: var(--shadow-md);
        }
        .header__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1200px;
            margin: 0 auto;
            height: 62px;
            gap: var(--spacing-lg);
        }
        .header__logo {
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--color-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: opacity var(--transition-fast);
        }
        .header__logo:hover {
            opacity: 0.85;
        }
        .header__logo i {
            color: var(--color-accent);
            font-size: 1.35rem;
        }
        .header__nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
        }
        .header__nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            border-radius: var(--radius-md);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-muted);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
            letter-spacing: 0.01em;
        }
        .header__nav a:hover {
            color: var(--color-text-heading);
            background: var(--color-bg-alt);
        }
        .header__nav a.active {
            color: var(--color-accent);
            background: rgba(37, 99, 235, 0.06);
            font-weight: 600;
        }
        .header__nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 3px;
            background: var(--color-accent);
            transition: width var(--transition-fast);
        }
        .header__actions {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-shrink: 0;
        }
        .header__search-btn {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-text-muted);
            transition: all var(--transition-fast);
            background: var(--color-bg-alt);
            font-size: 0.9rem;
        }
        .header__search-btn:hover {
            color: var(--color-accent);
            background: rgba(37, 99, 235, 0.08);
        }
        .header__cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 18px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.88rem;
            background: var(--color-accent);
            color: #fff;
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.01em;
            box-shadow: var(--shadow-sm);
        }
        .header__cta:hover {
            background: var(--color-primary-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .header__cta:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        .header__hamburger {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-md);
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 5px;
            background: var(--color-bg-alt);
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }
        .header__hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--color-text-heading);
            border-radius: 2px;
            transition: all var(--transition-base);
        }
        .header__hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .header__hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .header__hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        @media (max-width: 1024px) {
            .header__nav {
                position: fixed;
                top: 62px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: var(--spacing-lg);
                gap: 2px;
                border-bottom: 1px solid var(--color-border);
                box-shadow: var(--shadow-lg);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: all var(--transition-base);
                z-index: 99;
            }
            .header__nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .header__nav a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-md);
                font-size: 0.95rem;
            }
            .header__nav a.active::after {
                display: none;
            }
            .header__hamburger {
                display: flex;
            }
            .header__cta {
                padding: 8px 14px;
                font-size: 0.82rem;
            }
        }
        @media (max-width: 520px) {
            .header__inner {
                height: 56px;
                gap: var(--spacing-sm);
            }
            .header__logo {
                font-size: 1.1rem;
            }
            .header__cta {
                font-size: 0.78rem;
                padding: 7px 12px;
            }
            .header__nav {
                top: 56px;
            }
        }

        /* Hero Banner */
        .page-hero {
            position: relative;
            padding: var(--spacing-3xl) 0;
            background: linear-gradient(160deg, #0b1e33 0%, #0f2b45 35%, #132f4c 100%);
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: center;
        }
        .page-hero__bg {
            position: absolute;
            inset: 0;
            background-image: url('assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.28;
            mix-blend-mode: soft-light;
            z-index: 0;
        }
        .page-hero__overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 60% 40%, rgba(37, 99, 235, 0.18) 0%, transparent 60%),
                radial-gradient(ellipse at 30% 70%, rgba(8, 145, 178, 0.1) 0%, transparent 55%);
            z-index: 1;
        }
        .page-hero__content {
            position: relative;
            z-index: 2;
            max-width: 700px;
        }
        .page-hero__badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.1);
            color: #cbd5e1;
            border: 1px solid rgba(255, 255, 255, 0.15);
            margin-bottom: var(--spacing-lg);
            letter-spacing: 0.02em;
            backdrop-filter: blur(4px);
        }
        .page-hero__badge i {
            color: var(--color-accent-glow);
            font-size: 0.7rem;
        }
        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 700;
            color: #ffffff;
            line-height: 1.25;
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.01em;
        }
        .page-hero h1 span {
            background: linear-gradient(135deg, #60a5fa, #38bdf8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-hero__desc {
            font-size: 1.1rem;
            color: #cbd5e1;
            line-height: 1.7;
            max-width: 560px;
            letter-spacing: 0.01em;
        }
        @media (max-width: 768px) {
            .page-hero {
                padding: var(--spacing-2xl) 0;
                min-height: 300px;
            }
            .page-hero h1 {
                font-size: 2rem;
            }
            .page-hero__desc {
                font-size: 1rem;
            }
        }
        @media (max-width: 520px) {
            .page-hero {
                min-height: 260px;
                padding: var(--spacing-xl) 0;
            }
            .page-hero h1 {
                font-size: 1.6rem;
            }
            .page-hero__desc {
                font-size: 0.9rem;
            }
            .page-hero__badge {
                font-size: 0.75rem;
                padding: 5px 10px;
            }
        }

        /* Section */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section--alt {
            background: var(--color-bg-alt);
        }
        .section--soft {
            background: var(--color-bg-soft);
        }
        .section__header {
            text-align: center;
            margin-bottom: var(--spacing-2xl);
        }
        .section__label {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--color-accent);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: var(--spacing-sm);
        }
        .section__title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-text-heading);
            line-height: 1.3;
            letter-spacing: 0.01em;
        }
        .section__subtitle {
            font-size: 1.05rem;
            color: var(--color-text-muted);
            margin-top: var(--spacing-sm);
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.6;
        }
        @media (max-width: 768px) {
            .section {
                padding: var(--spacing-2xl) 0;
            }
            .section__title {
                font-size: 1.6rem;
            }
            .section__subtitle {
                font-size: 0.95rem;
            }
        }
        @media (max-width: 520px) {
            .section {
                padding: var(--spacing-xl) 0;
            }
            .section__title {
                font-size: 1.35rem;
            }
        }

        /* Cards Grid */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }
        .cards-grid--2col {
            grid-template-columns: repeat(2, 1fr);
        }
        .cards-grid--4col {
            grid-template-columns: repeat(4, 1fr);
        }
        @media (max-width: 1024px) {
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cards-grid--4col {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .cards-grid,
            .cards-grid--2col,
            .cards-grid--4col {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
        }

        /* Card */
        .card {
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            padding: var(--spacing-xl);
            border: 1px solid var(--color-border);
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            border-color: transparent;
            transform: translateY(-3px);
        }
        .card__icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: var(--spacing-md);
            flex-shrink: 0;
        }
        .card__icon--blue {
            background: #eff6ff;
            color: #2563eb;
        }
        .card__icon--teal {
            background: #f0fdfa;
            color: #0891b2;
        }
        .card__icon--amber {
            background: #fffbeb;
            color: #d97706;
        }
        .card__icon--green {
            background: #ecfdf5;
            color: #059669;
        }
        .card__icon--purple {
            background: #faf5ff;
            color: #7c3aed;
        }
        .card__icon--rose {
            background: #fff1f2;
            color: #e11d48;
        }
        .card__title {
            font-size: 1.1rem;
            font-weight: 650;
            color: var(--color-text-heading);
            margin-bottom: var(--spacing-xs);
            letter-spacing: 0.01em;
        }
        .card__desc {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.6;
            flex-grow: 1;
        }
        .card__link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--color-accent);
            margin-top: var(--spacing-md);
            transition: gap var(--transition-fast);
        }
        .card__link:hover {
            gap: 8px;
        }
        .card__image {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-bottom: var(--spacing-md);
            aspect-ratio: 16 / 10;
            background: var(--color-bg-alt);
        }
        .card__image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .card:hover .card__image img {
            transform: scale(1.04);
        }
        .card__tag {
            display: inline-block;
            padding: 3px 10px;
            border-radius: var(--radius-sm);
            font-size: 0.75rem;
            font-weight: 600;
            background: #eff6ff;
            color: #2563eb;
            margin-bottom: var(--spacing-sm);
        }

        /* Stats */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
        }
        .stat-card {
            text-align: center;
            padding: var(--spacing-xl) var(--spacing-md);
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            transition: all var(--transition-base);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-md);
            border-color: transparent;
            transform: translateY(-2px);
        }
        .stat-card__number {
            font-size: 2.6rem;
            font-weight: 700;
            color: var(--color-accent);
            line-height: 1;
            letter-spacing: -0.02em;
        }
        .stat-card__label {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            margin-top: var(--spacing-xs);
            font-weight: 500;
        }
        @media (max-width: 1024px) {
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-md);
            }
            .stat-card__number {
                font-size: 2rem;
            }
        }

        /* Process Steps */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
            position: relative;
        }
        .process-step {
            text-align: center;
            position: relative;
            padding: var(--spacing-lg);
        }
        .process-step__num {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--color-accent);
            color: #fff;
            font-weight: 700;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto var(--spacing-md);
            position: relative;
            z-index: 2;
            box-shadow: var(--shadow-glow);
        }
        .process-step__title {
            font-weight: 650;
            font-size: 1rem;
            color: var(--color-text-heading);
            margin-bottom: 4px;
        }
        .process-step__desc {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            line-height: 1.5;
        }
        @media (max-width: 1024px) {
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .process-steps {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
        }

        /* Solution tags */
        .tags-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            justify-content: center;
        }
        .tag-pill {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 10px 18px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 500;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            color: var(--color-text);
            transition: all var(--transition-fast);
            cursor: default;
        }
        .tag-pill:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
            background: rgba(37, 99, 235, 0.04);
            box-shadow: var(--shadow-sm);
        }
        .tag-pill i {
            font-size: 0.75rem;
            color: var(--color-accent);
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .faq-item {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: #cbd5e1;
        }
        .faq-item__q {
            width: 100%;
            text-align: left;
            padding: var(--spacing-lg) var(--spacing-xl);
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-text-heading);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: var(--spacing-md);
            transition: color var(--transition-fast);
            letter-spacing: 0.01em;
        }
        .faq-item__q:hover {
            color: var(--color-accent);
        }
        .faq-item__q i {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            transition: transform var(--transition-base);
            flex-shrink: 0;
        }
        .faq-item.open .faq-item__q i {
            transform: rotate(180deg);
            color: var(--color-accent);
        }
        .faq-item__a {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
        }
        .faq-item.open .faq-item__a {
            max-height: 300px;
        }
        .faq-item__a-inner {
            padding: 0 var(--spacing-xl) var(--spacing-lg);
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.7;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(160deg, #0b1e33 0%, #0f2b45 40%, #132f4c 100%);
            padding: var(--spacing-section) 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section__bg {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 30%, rgba(37, 99, 235, 0.2) 0%, transparent 60%);
            z-index: 0;
        }
        .cta-section__content {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.01em;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: #cbd5e1;
            margin-bottom: var(--spacing-xl);
            max-width: 550px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.6;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            letter-spacing: 0.01em;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn--primary {
            background: var(--color-accent);
            color: #fff;
            box-shadow: var(--shadow-md);
        }
        .btn--primary:hover {
            background: #1d4ed8;
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }
        .btn--primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        .btn--outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.35);
        }
        .btn--outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }
        @media (max-width: 520px) {
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .btn {
                padding: 11px 20px;
                font-size: 0.88rem;
            }
        }

        /* Footer */
        .footer {
            background: var(--color-bg-dark);
            color: #cbd5e1;
            padding: var(--spacing-3xl) 0 var(--spacing-xl);
            font-size: 0.9rem;
        }
        .footer__grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-xl);
            margin-bottom: var(--spacing-2xl);
        }
        .footer__brand {
            font-weight: 700;
            font-size: 1.2rem;
            color: #fff;
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.02em;
        }
        .footer__desc {
            color: #94a3b8;
            line-height: 1.6;
            font-size: 0.85rem;
        }
        .footer h4 {
            font-size: 0.85rem;
            font-weight: 600;
            color: #e2e8f0;
            margin-bottom: var(--spacing-md);
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }
        .footer ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer ul li a {
            color: #94a3b8;
            font-size: 0.85rem;
            transition: color var(--transition-fast);
        }
        .footer ul li a:hover {
            color: #fff;
        }
        .footer__bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: var(--spacing-md);
            padding-top: var(--spacing-lg);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.82rem;
            color: #94a3b8;
        }
        .footer__bottom a {
            color: #94a3b8;
            transition: color var(--transition-fast);
        }
        .footer__bottom a:hover {
            color: #fff;
        }
        .footer__disclaimer {
            font-size: 0.78rem;
            color: #64748b;
            line-height: 1.6;
            text-align: center;
        }
        @media (max-width: 768px) {
            .footer__grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-lg);
            }
        }
        @media (max-width: 520px) {
            .footer__grid {
                grid-template-columns: 1fr;
            }
            .footer__bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* Divider */
        .divider {
            border: none;
            height: 1px;
            background: var(--color-border);
            margin: 0;
        }

        /* Fade in animation */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-in {
            animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) both;
        }
        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }

/* roulang page: category4 */
/* ============ 设计变量 ============ */
        :root {
            --color-primary: #1a56db;
            --color-primary-light: #3b82f6;
            --color-primary-lighter: #dbeafe;
            --color-primary-dark: #1e3a8a;
            --color-accent: #f59e0b;
            --color-accent-light: #fef3c7;
            --color-accent-dark: #d97706;
            --color-bg: #ffffff;
            --color-bg-alt: #f8fafc;
            --color-bg-subtle: #f1f5f9;
            --color-bg-dark: #0f172a;
            --color-text: #1e293b;
            --color-text-heading: #0f172a;
            --color-text-muted: #64748b;
            --color-text-light: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #10b981;
            --color-success-light: #d1fae5;
            --color-white: #ffffff;

            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 50%;

            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08), 0 8px 32px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1), 0 16px 48px rgba(0, 0, 0, 0.05);
            --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12), 0 24px 64px rgba(0, 0, 0, 0.06);

            --spacing-xs: 4px;
            --spacing-sm: 8px;
            --spacing: 16px;
            --spacing-md: 20px;
            --spacing-lg: 24px;
            --spacing-xl: 32px;
            --spacing-2xl: 48px;
            --spacing-3xl: 64px;
            --spacing-4xl: 80px;

            --font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --font-size-xs: 0.75rem;
            --font-size-sm: 0.875rem;
            --font-size-base: 1rem;
            --font-size-md: 1.125rem;
            --font-size-lg: 1.25rem;
            --font-size-xl: 1.5rem;
            --font-size-2xl: 2rem;
            --font-size-3xl: 2.5rem;
            --font-size-4xl: 3rem;
            --font-size-5xl: 3.75rem;

            --line-height-tight: 1.2;
            --line-height-normal: 1.6;
            --line-height-relaxed: 1.8;

            --transition-fast: 0.15s ease;
            --transition: 0.25s ease;
            --transition-slow: 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);

            --max-width: 1280px;
            --max-width-narrow: 960px;
            --header-height: 68px;
        }

        /* ============ 基础 Reset ============ */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            text-rendering: optimizeLegibility;
        }

        body {
            font-family: var(--font-family);
            font-size: var(--font-size-base);
            line-height: var(--line-height-normal);
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            overflow-x: hidden;
        }

        img {
            display: block;
            max-width: 100%;
            height: auto;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            font-size: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: var(--line-height-tight);
            color: var(--color-text-heading);
            font-weight: 700;
        }

        /* ============ 容器 ============ */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
        }

        .container--narrow {
            max-width: var(--max-width-narrow);
        }

        /* ============ Header / 导航 ============ */
        .header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition);
        }

        .header--scrolled {
            box-shadow: var(--shadow-md);
        }

        .header__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: var(--spacing-xl);
        }

        .header__logo {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            font-size: var(--font-size-xl);
            font-weight: 800;
            color: var(--color-primary-dark);
            letter-spacing: -0.02em;
            white-space: nowrap;
            flex-shrink: 0;
            text-decoration: none;
        }

        .header__logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.2rem;
            font-weight: 700;
            flex-shrink: 0;
        }

        .header__nav {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .header__nav::-webkit-scrollbar {
            display: none;
        }

        .header__nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            border-radius: var(--radius);
            font-size: var(--font-size-sm);
            font-weight: 500;
            color: var(--color-text-muted);
            white-space: nowrap;
            transition: all var(--transition-fast);
            position: relative;
            letter-spacing: 0.01em;
        }

        .header__nav a:hover {
            color: var(--color-primary);
            background: var(--color-primary-lighter);
        }

        .header__nav a.active {
            color: var(--color-primary);
            background: var(--color-primary-lighter);
            font-weight: 600;
        }

        .header__nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 3px;
            border-radius: 3px;
            background: var(--color-primary);
        }

        .header__search-wrap {
            position: relative;
            flex-shrink: 0;
            display: flex;
            align-items: center;
        }

        .header__search {
            width: 200px;
            padding: 9px 14px 9px 38px;
            border-radius: var(--radius-full);
            border: 1.5px solid var(--color-border);
            background: var(--color-bg-alt);
            font-size: var(--font-size-sm);
            color: var(--color-text);
            transition: all var(--transition-fast);
            letter-spacing: 0.01em;
        }

        .header__search::placeholder {
            color: var(--color-text-light);
        }
        .header__search:focus {
            border-color: var(--color-primary-light);
            background: var(--color-white);
            box-shadow: 0 0 0 4px rgba(26, 86, 219, 0.08);
            width: 240px;
        }

        .header__search-icon {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--color-text-muted);
            font-size: 0.9rem;
            pointer-events: none;
        }

        .header__cta {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: var(--radius-full);
            background: var(--color-primary);
            color: #fff;
            font-weight: 600;
            font-size: var(--font-size-sm);
            letter-spacing: 0.02em;
            transition: all var(--transition-fast);
            white-space: nowrap;
            box-shadow: 0 2px 8px rgba(26, 86, 219, 0.25);
        }

        .header__cta:hover {
            background: var(--color-primary-dark);
            box-shadow: 0 4px 16px rgba(26, 86, 219, 0.35);
            transform: translateY(-1px);
        }

        .header__hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
            z-index: 101;
            background: none;
            border: none;
        }

        .header__hamburger span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: var(--color-text);
            border-radius: 2px;
            transition: all var(--transition);
        }

        /* ============ 移动端导航面板 ============ */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            z-index: 99;
            background: rgba(0, 0, 0, 0.5);
            transition: opacity var(--transition);
        }

        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            width: 300px;
            max-width: 85vw;
            height: 100vh;
            background: var(--color-white);
            z-index: 100;
            padding: var(--spacing-2xl) var(--spacing-lg);
            flex-direction: column;
            gap: var(--spacing);
            box-shadow: var(--shadow-xl);
            overflow-y: auto;
            transform: translateX(100%);
            transition: transform var(--transition-slow);
        }

        .mobile-nav-panel--open {
            transform: translateX(0);
        }

        .mobile-nav-panel a {
            display: block;
            padding: 12px 16px;
            border-radius: var(--radius);
            font-weight: 500;
            color: var(--color-text);
            transition: all var(--transition-fast);
            font-size: var(--font-size-md);
        }

        .mobile-nav-panel a:hover,
        .mobile-nav-panel a.active {
            background: var(--color-primary-lighter);
            color: var(--color-primary);
            font-weight: 600;
        }

        .mobile-nav-panel__close {
            align-self: flex-end;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-full);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--color-text-muted);
            cursor: pointer;
            transition: all var(--transition-fast);
            border: 1px solid var(--color-border);
            background: var(--color-white);
        }

        .mobile-nav-panel__close:hover {
            background: var(--color-bg-subtle);
            color: var(--color-text);
        }

        /* ============ 页面 Banner ============ */
        .page-banner {
            position: relative;
            padding: var(--spacing-4xl) 0 var(--spacing-3xl);
            background-image: url('assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 58, 138, 0.78) 50%, rgba(15, 23, 42, 0.85) 100%);
            z-index: 1;
        }

        .page-banner__content {
            position: relative;
            z-index: 2;
            max-width: 720px;
            color: var(--color-white);
        }

        .page-banner__badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: var(--radius-full);
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(8px);
            font-size: var(--font-size-xs);
            font-weight: 600;
            letter-spacing: 0.04em;
            text-transform: uppercase;
            color: #e2e8f0;
            margin-bottom: var(--spacing-lg);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .page-banner__title {
            font-size: var(--font-size-4xl);
            font-weight: 800;
            color: #fff;
            margin-bottom: var(--spacing);
            letter-spacing: -0.02em;
            line-height: 1.15;
        }

        .page-banner__desc {
            font-size: var(--font-size-lg);
            color: rgba(255, 255, 255, 0.85);
            line-height: var(--line-height-relaxed);
            margin-bottom: var(--spacing-xl);
            max-width: 560px;
        }

        .page-banner__actions {
            display: flex;
            gap: var(--spacing);
            flex-wrap: wrap;
        }

        /* ============ 面包屑 ============ */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            font-size: var(--font-size-sm);
            color: var(--color-text-muted);
            padding: var(--spacing-lg) 0;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--color-primary);
        }
        .breadcrumb span {
            color: var(--color-text);
            font-weight: 500;
        }
        .breadcrumb__sep {
            color: var(--color-text-light);
            font-size: 0.7rem;
        }

        /* ============ 板块通用 ============ */
        .section {
            padding: var(--spacing-3xl) 0;
        }

        .section--alt {
            background: var(--color-bg-alt);
        }

        .section--dark {
            background: var(--color-bg-dark);
            color: #e2e8f0;
        }

        .section__header {
            text-align: center;
            margin-bottom: var(--spacing-2xl);
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
        }

        .section__label {
            display: inline-block;
            font-size: var(--font-size-xs);
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--color-primary);
            margin-bottom: var(--spacing-sm);
            background: var(--color-primary-lighter);
            padding: 4px 12px;
            border-radius: var(--radius-full);
        }

        .section__title {
            font-size: var(--font-size-3xl);
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: var(--spacing);
            color: var(--color-text-heading);
        }

        .section--dark .section__title {
            color: #fff;
        }

        .section__desc {
            font-size: var(--font-size-md);
            color: var(--color-text-muted);
            line-height: var(--line-height-relaxed);
        }

        .section--dark .section__desc {
            color: #cbd5e1;
        }

        /* ============ 卡片网格 ============ */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
            gap: var(--spacing-lg);
        }

        .card-grid--3 {
            grid-template-columns: repeat(3, 1fr);
        }

        .card-grid--4 {
            grid-template-columns: repeat(4, 1fr);
        }

        /* ============ 服务卡片 ============ */
        .card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: transparent;
        }

        .card__image {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }

        .card__body {
            padding: var(--spacing-lg);
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
            flex: 1;
        }

        .card__icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: var(--spacing-xs);
            background: var(--color-primary-lighter);
            color: var(--color-primary);
            flex-shrink: 0;
        }

        .card__tag {
            display: inline-block;
            font-size: var(--font-size-xs);
            font-weight: 600;
            padding: 3px 10px;
            border-radius: var(--radius-full);
            background: var(--color-success-light);
            color: var(--color-success);
            letter-spacing: 0.03em;
            align-self: flex-start;
        }

        .card__title {
            font-size: var(--font-size-lg);
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: -0.01em;
        }

        .card__text {
            font-size: var(--font-size-sm);
            color: var(--color-text-muted);
            line-height: var(--line-height-relaxed);
            flex: 1;
        }

        .card__link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: var(--font-size-sm);
            color: var(--color-primary);
            margin-top: auto;
            transition: gap var(--transition-fast);
        }

        .card__link:hover {
            gap: 10px;
            color: var(--color-primary-dark);
        }

        .card__link i {
            font-size: 0.75rem;
        }

        /* ============ 特色服务卡片（横向） ============ */
        .feature-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
        }

        .feature-row__image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            aspect-ratio: 4/3;
        }

        .feature-row__image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .feature-row__content h3 {
            font-size: var(--font-size-2xl);
            font-weight: 700;
            margin-bottom: var(--spacing);
            letter-spacing: -0.01em;
        }

        .feature-row__content p {
            color: var(--color-text-muted);
            line-height: var(--line-height-relaxed);
            margin-bottom: var(--spacing-lg);
        }

        .feature-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .feature-list__item {
            display: flex;
            align-items: flex-start;
            gap: var(--spacing-sm);
            font-size: var(--font-size-sm);
            color: var(--color-text);
            line-height: 1.5;
        }

        .feature-list__item i {
            color: var(--color-success);
            margin-top: 3px;
            flex-shrink: 0;
        }

        /* ============ 数据统计 ============ */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
        }

        .stat-card {
            text-align: center;
            padding: var(--spacing-xl) var(--spacing-lg);
            background: var(--color-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            transition: all var(--transition);
        }

        .stat-card:hover {
            box-shadow: var(--shadow-md);
            border-color: transparent;
            transform: translateY(-2px);
        }

        .stat-card__number {
            font-size: var(--font-size-4xl);
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: -0.03em;
            line-height: 1;
            margin-bottom: var(--spacing-xs);
        }

        .stat-card__suffix {
            font-size: var(--font-size-lg);
            font-weight: 600;
            color: var(--color-primary-light);
        }

        .stat-card__label {
            font-size: var(--font-size-sm);
            color: var(--color-text-muted);
            font-weight: 500;
        }

        /* ============ 方案对比表 ============ */
        .plan-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
            align-items: stretch;
        }

        .plan-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            border: 2px solid var(--color-border);
            padding: var(--spacing-xl);
            display: flex;
            flex-direction: column;
            gap: var(--spacing);
            transition: all var(--transition);
            position: relative;
        }

        .plan-card--featured {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-md);
            transform: scale(1.03);
            z-index: 1;
        }

        .plan-card--featured::before {
            content: '推荐方案';
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--color-primary);
            color: #fff;
            font-size: var(--font-size-xs);
            font-weight: 700;
            padding: 5px 16px;
            border-radius: var(--radius-full);
            letter-spacing: 0.03em;
            white-space: nowrap;
        }

        .plan-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }

        .plan-card--featured:hover {
            border-color: var(--color-primary);
        }

        .plan-card__name {
            font-size: var(--font-size-lg);
            font-weight: 700;
            text-align: center;
        }

        .plan-card__price {
            text-align: center;
            font-size: var(--font-size-3xl);
            font-weight: 800;
            color: var(--color-primary);
        }

        .plan-card__price small {
            font-size: var(--font-size-sm);
            font-weight: 400;
            color: var(--color-text-muted);
        }

        .plan-card__features {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
            flex: 1;
        }

        .plan-card__features li {
            font-size: var(--font-size-sm);
            color: var(--color-text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .plan-card__features li i {
            color: var(--color-success);
            font-size: 0.8rem;
        }

        .plan-card__cta {
            display: block;
            text-align: center;
            padding: 12px;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: var(--font-size-sm);
            background: var(--color-bg-subtle);
            color: var(--color-text);
            transition: all var(--transition-fast);
            margin-top: auto;
        }

        .plan-card--featured .plan-card__cta {
            background: var(--color-primary);
            color: #fff;
        }

        .plan-card__cta:hover {
            background: var(--color-primary);
            color: #fff;
        }

        /* ============ FAQ ============ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing);
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid var(--color-border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
            background: var(--color-white);
        }

        .faq-item:hover {
            border-color: var(--color-primary-light);
            box-shadow: var(--shadow-sm);
        }

        .faq-item__question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--spacing-lg);
            font-size: var(--font-size-base);
            font-weight: 600;
            color: var(--color-text-heading);
            cursor: pointer;
            background: none;
            border: none;
            text-align: left;
            line-height: 1.4;
            gap: var(--spacing);
            transition: background var(--transition-fast);
        }

        .faq-item__question:hover {
            background: var(--color-bg-subtle);
        }

        .faq-item__question i {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item--open .faq-item__question i {
            transform: rotate(180deg);
            color: var(--color-primary);
        }

        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            padding: 0 var(--spacing-lg);
            font-size: var(--font-size-sm);
            color: var(--color-text-muted);
            line-height: var(--line-height-relaxed);
        }

        .faq-item--open .faq-item__answer {
            max-height: 400px;
            padding: 0 var(--spacing-lg) var(--spacing-lg);
        }

        /* ============ CTA 板块 ============ */
        .cta-block {
            background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
            border-radius: var(--radius-xl);
            padding: var(--spacing-3xl) var(--spacing-2xl);
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 20%, rgba(255, 255, 255, 0.08) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 80%, rgba(255, 255, 255, 0.06) 0%, transparent 60%);
            pointer-events: none;
        }

        .cta-block h2 {
            font-size: var(--font-size-3xl);
            font-weight: 800;
            color: #fff;
            margin-bottom: var(--spacing);
            position: relative;
            z-index: 1;
            letter-spacing: -0.02em;
        }

        .cta-block p {
            font-size: var(--font-size-md);
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: var(--spacing-xl);
            position: relative;
            z-index: 1;
            max-width: 540px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-block__actions {
            display: flex;
            gap: var(--spacing);
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        /* ============ 按钮系统 ============ */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: var(--font-size-sm);
            letter-spacing: 0.02em;
            transition: all var(--transition-fast);
            cursor: pointer;
            white-space: nowrap;
            text-decoration: none;
        }

        .btn--primary {
            background: var(--color-primary);
            color: #fff;
            box-shadow: 0 2px 8px rgba(26, 86, 219, 0.25);
        }

        .btn--primary:hover {
            background: var(--color-primary-dark);
            box-shadow: 0 6px 20px rgba(26, 86, 219, 0.4);
            transform: translateY(-2px);
        }

        .btn--outline {
            background: transparent;
            color: var(--color-primary);
            border: 2px solid var(--color-primary);
        }

        .btn--outline:hover {
            background: var(--color-primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn--white {
            background: #fff;
            color: var(--color-primary-dark);
            box-shadow: var(--shadow);
        }

        .btn--white:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }

        .btn--ghost-white {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.35);
            backdrop-filter: blur(8px);
        }

        .btn--ghost-white:hover {
            background: rgba(255, 255, 255, 0.25);
            border-color: rgba(255, 255, 255, 0.6);
            transform: translateY(-2px);
        }

        .btn--lg {
            padding: 14px 32px;
            font-size: var(--font-size-base);
            border-radius: var(--radius-full);
        }

        .btn--sm {
            padding: 8px 16px;
            font-size: var(--font-size-xs);
            border-radius: var(--radius-full);
        }

        /* ============ 标签 ============ */
        .tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            font-size: var(--font-size-xs);
            font-weight: 600;
            letter-spacing: 0.03em;
        }

        .tag--blue {
            background: var(--color-primary-lighter);
            color: var(--color-primary);
        }
        .tag--green {
            background: var(--color-success-light);
            color: var(--color-success);
        }
        .tag--amber {
            background: var(--color-accent-light);
            color: var(--color-accent-dark);
        }

        /* ============ 页脚 ============ */
        .footer {
            background: var(--color-bg-dark);
            color: #cbd5e1;
            padding: var(--spacing-3xl) 0 var(--spacing-xl);
            font-size: var(--font-size-sm);
        }

        .footer__grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-xl);
            margin-bottom: var(--spacing-2xl);
        }

        .footer__brand {
            font-size: var(--font-size-xl);
            font-weight: 800;
            color: #fff;
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.02em;
        }

        .footer__desc {
            color: #94a3b8;
            line-height: var(--line-height-relaxed);
            font-size: var(--font-size-sm);
        }

        .footer h4 {
            color: #f1f5f9;
            font-size: var(--font-size-sm);
            font-weight: 700;
            margin-bottom: var(--spacing);
            letter-spacing: 0.03em;
            text-transform: uppercase;
        }

        .footer ul {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-xs);
        }

        .footer ul li a {
            color: #94a3b8;
            transition: color var(--transition-fast);
            font-size: var(--font-size-sm);
        }

        .footer ul li a:hover {
            color: #fff;
        }

        .footer__bottom {
            border-top: 1px solid #334155;
            padding-top: var(--spacing-lg);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: var(--spacing);
            color: #94a3b8;
            font-size: var(--font-size-xs);
        }

        .footer__bottom a {
            color: #94a3b8;
            transition: color var(--transition-fast);
        }
        .footer__bottom a:hover {
            color: #fff;
        }

        .footer__disclaimer {
            color: #64748b;
            font-size: var(--font-size-xs);
            line-height: 1.6;
            text-align: center;
        }

        /* ============ 响应式 - 平板 ============ */
        @media (max-width: 1024px) {
            :root {
                --header-height: 62px;
                --spacing-3xl: 48px;
                --spacing-4xl: 56px;
            }

            .header__search {
                width: 150px;
            }
            .header__search:focus {
                width: 180px;
            }
            .header__nav {
                gap: 0;
            }
            .header__nav a {
                padding: 6px 10px;
                font-size: var(--font-size-xs);
            }
            .header__cta {
                padding: 8px 16px;
                font-size: var(--font-size-xs);
            }

            .card-grid--3,
            .card-grid--4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .plan-grid {
                grid-template-columns: 1fr;
                max-width: 500px;
                margin: 0 auto;
            }
            .plan-card--featured {
                transform: scale(1);
            }
            .feature-row {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }
            .footer__grid {
                grid-template-columns: 1fr 1fr;
            }
            .page-banner__title {
                font-size: var(--font-size-3xl);
            }
            .section__title {
                font-size: var(--font-size-2xl);
            }
        }

        /* ============ 响应式 - 手机 ============ */
        @media (max-width: 768px) {
            :root {
                --header-height: 56px;
                --spacing-3xl: 36px;
                --spacing-4xl: 44px;
                --spacing-2xl: 32px;
            }

            .header__nav {
                display: none;
            }
            .header__search-wrap {
                display: none;
            }
            .header__cta {
                display: none;
            }
            .header__hamburger {
                display: flex;
            }
            .mobile-nav-overlay {
                display: block;
                opacity: 0;
                pointer-events: none;
            }
            .mobile-nav-overlay--visible {
                opacity: 1;
                pointer-events: auto;
            }
            .mobile-nav-panel {
                display: flex;
            }

            .container {
                padding: 0 var(--spacing);
            }

            .page-banner {
                padding: var(--spacing-2xl) 0 var(--spacing-xl);
            }
            .page-banner__title {
                font-size: var(--font-size-2xl);
            }
            .page-banner__desc {
                font-size: var(--font-size-base);
            }

            .card-grid,
            .card-grid--3,
            .card-grid--4 {
                grid-template-columns: 1fr;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--spacing);
            }
            .stat-card__number {
                font-size: var(--font-size-2xl);
            }
            .plan-grid {
                grid-template-columns: 1fr;
                max-width: 100%;
            }
            .plan-card--featured {
                transform: scale(1);
            }
            .feature-row {
                grid-template-columns: 1fr;
            }
            .footer__grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-lg);
            }
            .footer__bottom {
                flex-direction: column;
                text-align: center;
                gap: var(--spacing-sm);
            }
            .section__title {
                font-size: var(--font-size-xl);
            }
            .cta-block h2 {
                font-size: var(--font-size-xl);
            }
            .cta-block {
                padding: var(--spacing-xl) var(--spacing-lg);
            }
            .page-banner__actions {
                flex-direction: column;
                width: 100%;
            }
            .page-banner__actions .btn {
                width: 100%;
                justify-content: center;
            }
            .cta-block__actions {
                flex-direction: column;
                align-items: center;
            }
            .cta-block__actions .btn {
                width: 100%;
                justify-content: center;
                max-width: 300px;
            }
        }

        @media (max-width: 520px) {
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-sm);
            }
            .stat-card {
                padding: var(--spacing) var(--spacing-sm);
            }
            .stat-card__number {
                font-size: var(--font-size-xl);
            }
            .footer__grid {
                grid-template-columns: 1fr;
            }
            .card__body {
                padding: var(--spacing);
            }
            .section__header {
                margin-bottom: var(--spacing-xl);
            }
            .breadcrumb {
                font-size: var(--font-size-xs);
            }
            .page-banner__title {
                font-size: var(--font-size-xl);
            }
            .header__logo {
                font-size: var(--font-size-lg);
            }
            .header__logo-icon {
                width: 30px;
                height: 30px;
                font-size: 1rem;
            }
        }

/* roulang page: category5 */
:root {
 --primary: #1e293b;
 --primary-light: #334155;
 --accent: #0ea5e9;
 --accent-hover: #0284c7;
 --accent-subtle: #e0f2fe;
 --bg: #ffffff;
 --bg-alt: #f8fafc;
 --bg-dark: #0f172a;
 --text: #0f172a;
 --text-secondary: #475569;
 --text-muted: #94a3b8;
 --border: #e2e8f0;
 --border-light: #f1f5f9;
 --radius-sm: 0.5rem;
 --radius: 0.75rem;
 --radius-lg: 1rem;
 --radius-xl: 1.25rem;
 --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
 --shadow: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
 --shadow-md: 0 10px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
 --shadow-lg: 0 20px 40px -10px rgba(0,0,0,0.09), 0 12px 24px -12px rgba(0,0,0,0.05);
 --spacing-xs: 0.5rem;
 --spacing-sm: 0.75rem;
 --spacing-md: 1rem;
 --spacing-lg: 1.5rem;
 --spacing-xl: 2rem;
 --spacing-2xl: 3rem;
 --spacing-3xl: 4rem;
 --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
 --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
 }

 *,*::before,*::after {
 box-sizing: border-box;
 margin: 0;
 padding: 0;
 }

 html {
 scroll-behavior: smooth;
 -webkit-font-smoothing: antialiased;
 -moz-osx-font-smoothing: grayscale;
 }

 body {
 font-family: var(--font-sans);
 line-height: 1.6;
 color: var(--text);
 background: var(--bg);
 overflow-x: hidden;
 }

 a {
 color: inherit;
 text-decoration: none;
 transition: color var(--transition);
 }

 img {
 max-width: 100%;
 height: auto;
 display: block;
 }

 button,input,select,textarea {
 font: inherit;
 color: inherit;
 }

 ul {
 list-style: none;
 }

 .container {
 width: 100%;
 max-width: 1280px;
 margin-left: auto;
 margin-right: auto;
 padding-left: var(--spacing-lg);
 padding-right: var(--spacing-lg);
 }

 .section {
 padding-top: var(--spacing-3xl);
 padding-bottom: var(--spacing-3xl);
 }

 .section--alt {
 background: var(--bg-alt);
 }

 /* Header */
 .header {
 position: sticky;
 top: 0;
 z-index: 100;
 background: rgba(255,255,255,0.92);
 backdrop-filter: blur(16px);
 -webkit-backdrop-filter: blur(16px);
 border-bottom: 1px solid var(--border);
 transition: all var(--transition);
 }

 .header__inner {
 display: flex;
 align-items: center;
 justify-content: space-between;
 padding-top: var(--spacing-md);
 padding-bottom: var(--spacing-md);
 min-height: 64px;
 }

 .header__logo {
 font-size: 1.4rem;
 font-weight: 700;
 letter-spacing: -0.02em;
 color: var(--primary);
 display: flex;
 align-items: center;
 gap: 0.5rem;
 flex-shrink: 0;
 }

 .header__logo i {
 color: var(--accent);
 font-size: 1.3rem;
 }

 .header__nav {
 display: flex;
 align-items: center;
 gap: var(--spacing-xl);
 }

 .header__nav a {
 font-size: 0.925rem;
 font-weight: 500;
 color: var(--text-secondary);
 padding: 0.35rem 0;
 position: relative;
 white-space: nowrap;
 transition: color var(--transition);
 }

 .header__nav a::after {
 content: '';
 position: absolute;
 bottom: 0;
 left: 0;
 width: 0;
 height: 2px;
 background: var(--accent);
 border-radius: 2px;
 transition: width var(--transition);
 }

 .header__nav a:hover,
 .header__nav a.active {
 color: var(--primary);
 }

 .header__nav a.active::after,
 .header__nav a:hover::after {
 width: 100%;
 }

 .header__actions {
 display: flex;
 align-items: center;
 gap: var(--spacing-md);
 flex-shrink: 0;
 }

 .search-box {
 display: flex;
 align-items: center;
 background: var(--bg-alt);
 border: 1px solid var(--border);
 border-radius: var(--radius-lg);
 padding: 0.5rem 0.875rem;
 gap: 0.5rem;
 transition: all var(--transition);
 }

 .search-box:focus-within {
 border-color: var(--accent);
 box-shadow: 0 0 0 3px rgba(14,165,233,0.1);
 background: #fff;
 }

 .search-box i {
 color: var(--text-muted);
 font-size: 0.875rem;
 }

 .search-box input {
 border: none;
 background: transparent;
 outline: none;
 font-size: 0.875rem;
 width: 140px;
 color: var(--text);
 }

 .search-box input::placeholder {
 color: var(--text-muted);
 }

 .btn {
 display: inline-flex;
 align-items: center;
 justify-content: center;
 gap: 0.5rem;
 padding: 0.6rem 1.25rem;
 font-size: 0.9rem;
 font-weight: 600;
 border: none;
 border-radius: var(--radius);
 cursor: pointer;
 transition: all var(--transition);
 white-space: nowrap;
 letter-spacing: 0.01em;
 }

 .btn--primary {
 background: var(--accent);
 color: #fff;
 box-shadow: 0 2px 8px rgba(14,165,233,0.25);
 }

 .btn--primary:hover {
 background: var(--accent-hover);
 box-shadow: 0 6px 20px rgba(14,165,233,0.35);
 transform: translateY(-1px);
 }

 .btn--outline {
 background: transparent;
 border: 1.5px solid var(--border);
 color: var(--text);
 }

 .btn--outline:hover {
 border-color: var(--accent);
 color: var(--accent);
 background: var(--accent-subtle);
 }

 .btn--lg {
 padding: 0.8rem 1.75rem;
 font-size: 1rem;
 border-radius: var(--radius-lg);
 }

 .mobile-toggle {
 display: none;
 background: none;
 border: none;
 font-size: 1.5rem;
 color: var(--text);
 cursor: pointer;
 }

 /* Page Banner */
 .page-banner {
 padding-top: var(--spacing-3xl);
 padding-bottom: var(--spacing-2xl);
 background: var(--bg);
 position: relative;
 overflow: hidden;
 }

 .page-banner::before {
 content: '';
 position: absolute;
 top: -50%;
 right: -20%;
 width: 70%;
 height: 200%;
 background: radial-gradient(ellipse at center, rgba(14,165,233,0.04) 0%, transparent 70%);
 pointer-events: none;
 }

 .page-banner__content {
 max-width: 800px;
 }

 .page-banner__tag {
 display: inline-block;
 font-size: 0.8rem;
 font-weight: 600;
 color: var(--accent);
 background: var(--accent-subtle);
 padding: 0.3rem 0.75rem;
 border-radius: 999px;
 margin-bottom: var(--spacing-md);
 letter-spacing: 0.03em;
 text-transform: uppercase;
 }

 .page-banner__title {
 font-size: 2.75rem;
 font-weight: 800;
 line-height: 1.15;
 color: var(--primary);
 margin-bottom: var(--spacing-md);
 letter-spacing: -0.02em;
 }

 .page-banner__desc {
 font-size: 1.15rem;
 color: var(--text-secondary);
 max-width: 640px;
 line-height: 1.7;
 }

 /* Cards */
 .card {
 background: #fff;
 border: 1px solid var(--border);
 border-radius: var(--radius-lg);
 overflow: hidden;
 transition: all var(--transition);
 }

 .card:hover {
 box-shadow: var(--shadow-md);
 transform: translateY(-2px);
 border-color: transparent;
 }

 .card__img {
 aspect-ratio: 16/10;
 overflow: hidden;
 background: var(--bg-alt);
 }

 .card__img img {
 width: 100%;
 height: 100%;
 object-fit: cover;
 transition: transform 0.4s ease;
 }

 .card:hover .card__img img {
 transform: scale(1.04);
 }

 .card__body {
 padding: var(--spacing-xl);
 }

 .card__tag {
 display: inline-block;
 font-size: 0.78rem;
 font-weight: 600;
 color: var(--accent);
 background: var(--accent-subtle);
 padding: 0.2rem 0.6rem;
 border-radius: 999px;
 margin-bottom: var(--spacing-sm);
 }

 .card__title {
 font-size: 1.2rem;
 font-weight: 700;
 color: var(--primary);
 margin-bottom: var(--spacing-xs);
 line-height: 1.3;
 }

 .card__text {
 font-size: 0.925rem;
 color: var(--text-secondary);
 line-height: 1.6;
 }

 /* List block */
 .list-block {
 display: flex;
 flex-direction: column;
 gap: var(--spacing-md);
 }

 .list-block__item {
 display: flex;
 align-items: flex-start;
 gap: var(--spacing-md);
 padding: var(--spacing-lg);
 background: #fff;
 border: 1px solid var(--border);
 border-radius: var(--radius);
 transition: all var(--transition);
 }

 .list-block__item:hover {
 border-color: var(--accent);
 box-shadow: var(--shadow-sm);
 }

 .list-block__icon {
 width: 44px;
 height: 44px;
 border-radius: var(--radius-sm);
 background: var(--accent-subtle);
 color: var(--accent);
 display: flex;
 align-items: center;
 justify-content: center;
 font-size: 1.2rem;
 flex-shrink: 0;
 }

 .list-block__info h4 {
 font-weight: 700;
 color: var(--primary);
 margin-bottom: 0.25rem;
 }

 .list-block__info p {
 font-size: 0.9rem;
 color: var(--text-secondary);
 }

 /* Grid */
 .grid {
 display: grid;
 gap: var(--spacing-xl);
 }

 .grid--2 { grid-template-columns: repeat(2, 1fr); }
 .grid--3 { grid-template-columns: repeat(3, 1fr); }
 .grid--4 { grid-template-columns: repeat(4, 1fr); }

 /* Section heading */
 .section-heading {
 text-align: center;
 margin-bottom: var(--spacing-2xl);
 }

 .section-heading__tag {
 font-size: 0.8rem;
 font-weight: 600;
 color: var(--accent);
 text-transform: uppercase;
 letter-spacing: 0.04em;
 margin-bottom: var(--spacing-sm);
 }

 .section-heading__title {
 font-size: 2rem;
 font-weight: 800;
 color: var(--primary);
 letter-spacing: -0.02em;
 margin-bottom: var(--spacing-sm);
 }

 .section-heading__desc {
 font-size: 1rem;
 color: var(--text-secondary);
 max-width: 560px;
 margin: 0 auto;
 }

 /* Stats row */
 .stats-row {
 display: flex;
 gap: var(--spacing-xl);
 justify-content: center;
 flex-wrap: wrap;
 }

 .stat-item {
 text-align: center;
 min-width: 120px;
 }

 .stat-item__number {
 font-size: 2.5rem;
 font-weight: 800;
 color: var(--primary);
 letter-spacing: -0.02em;
 }

 .stat-item__label {
 font-size: 0.9rem;
 color: var(--text-secondary);
 margin-top: 0.25rem;
 }

 /* FAQ */
 .faq-list {
 max-width: 800px;
 margin: 0 auto;
 display: flex;
 flex-direction: column;
 gap: var(--spacing-md);
 }

 .faq-item {
 border: 1px solid var(--border);
 border-radius: var(--radius);
 overflow: hidden;
 transition: all var(--transition);
 background: #fff;
 }

 .faq-item__question {
 width: 100%;
 padding: var(--spacing-lg);
 background: none;
 border: none;
 text-align: left;
 font-weight: 600;
 font-size: 1rem;
 color: var(--primary);
 cursor: pointer;
 display: flex;
 justify-content: space-between;
 align-items: center;
 gap: var(--spacing-md);
 transition: color var(--transition);
 }

 .faq-item__question:hover {
 color: var(--accent);
 }

 .faq-item__question i {
 transition: transform var(--transition);
 font-size: 0.875rem;
 color: var(--text-muted);
 }

 .faq-item.open .faq-item__question i {
 transform: rotate(180deg);
 color: var(--accent);
 }

 .faq-item__answer {
 max-height: 0;
 overflow: hidden;
 transition: max-height 0.35s ease, padding 0.35s ease;
 }

 .faq-item.open .faq-item__answer {
 max-height: 300px;
 padding: 0 var(--spacing-lg) var(--spacing-lg);
 }

 .faq-item__answer p {
 font-size: 0.925rem;
 color: var(--text-secondary);
 line-height: 1.7;
 }

 /* CTA */
 .cta-section {
 background: var(--bg-dark);
 color: #fff;
 text-align: center;
 position: relative;
 overflow: hidden;
 }

 .cta-section::before {
 content: '';
 position: absolute;
 top: 0;
 left: 0;
 right: 0;
 bottom: 0;
 background: radial-gradient(ellipse at 30% 50%, rgba(14,165,233,0.15) 0%, transparent 60%);
 pointer-events: none;
 }

 .cta-section__title {
 font-size: 2rem;
 font-weight: 800;
 letter-spacing: -0.02em;
 color: #fff;
 margin-bottom: var(--spacing-md);
 position: relative;
 z-index: 1;
 }

 .cta-section__desc {
 font-size: 1.05rem;
 color: rgba(255,255,255,0.7);
 margin-bottom: var(--spacing-xl);
 position: relative;
 z-index: 1;
 max-width: 500px;
 margin-left: auto;
 margin-right: auto;
 }

 /* Footer */
 .footer {
 background: var(--bg-dark);
 color: #cbd5e1;
 padding-top: var(--spacing-3xl);
 padding-bottom: var(--spacing-xl);
 }

 .footer__grid {
 display: grid;
 grid-template-columns: 1.5fr 1fr 1fr 1fr;
 gap: var(--spacing-2xl);
 margin-bottom: var(--spacing-2xl);
 }

 .footer__brand {
 font-size: 1.3rem;
 font-weight: 700;
 color: #fff;
 margin-bottom: var(--spacing-sm);
 letter-spacing: -0.02em;
 }

 .footer__desc {
 font-size: 0.9rem;
 color: #94a3b8;
 line-height: 1.7;
 }

 .footer h4 {
 font-size: 0.85rem;
 font-weight: 700;
 color: #fff;
 margin-bottom: var(--spacing-md);
 text-transform: uppercase;
 letter-spacing: 0.04em;
 }

 .footer ul {
 display: flex;
 flex-direction: column;
 gap: 0.6rem;
 }

 .footer ul a {
 font-size: 0.9rem;
 color: #94a3b8;
 transition: color var(--transition);
 }

 .footer ul a:hover {
 color: var(--accent);
 }

 .footer__bottom {
 display: flex;
 justify-content: space-between;
 align-items: center;
 flex-wrap: wrap;
 gap: var(--spacing-md);
 padding-top: var(--spacing-xl);
 border-top: 1px solid rgba(255,255,255,0.08);
 font-size: 0.85rem;
 color: #64748b;
 }

 .footer__bottom a {
 color: #94a3b8;
 transition: color var(--transition);
 }

 .footer__bottom a:hover {
 color: var(--accent);
 }

 .footer__disclaimer {
 font-size: 0.8rem;
 color: #64748b;
 line-height: 1.6;
 }

 /* Responsive */
 @media (max-width: 1024px) {
 .header__nav a { font-size: 0.85rem; }
 .grid--4 { grid-template-columns: repeat(2, 1fr); }
 .grid--3 { grid-template-columns: repeat(2, 1fr); }
 .footer__grid { grid-template-columns: 1fr 1fr; }
 .page-banner__title { font-size: 2.25rem; }
 }

 @media (max-width: 768px) {
 .header__nav { display: none; }
 .search-box { display: none; }
 .mobile-toggle { display: block; }
 .header__actions .btn { display: none; }
 .header__inner { min-height: 56px; }
 .page-banner__title { font-size: 1.85rem; }
 .section-heading__title { font-size: 1.6rem; }
 .grid--2,.grid--3,.grid--4 { grid-template-columns: 1fr; }
 .stats-row { gap: var(--spacing-md); }
 .stat-item__number { font-size: 2rem; }
 .footer__grid { grid-template-columns: 1fr; }
 .footer__bottom { flex-direction: column; text-align: center; }
 .container { padding-left: var(--spacing-md); padding-right: var(--spacing-md); }
 .section { padding-top: var(--spacing-2xl); padding-bottom: var(--spacing-2xl); }
 .cta-section__title { font-size: 1.5rem; }
 }

 @media (max-width: 520px) {
 .page-banner__title { font-size: 1.6rem; }
 .section-heading__title { font-size: 1.4rem; }
 .btn--lg { padding: 0.65rem 1.25rem; font-size: 0.9rem; }
 .stats-row { gap: var(--spacing-sm); }
 .stat-item__number { font-size: 1.6rem; }
 .stat-item__label { font-size: 0.8rem; }
 }

 /* Mobile nav overlay */
 .mobile-nav {
 position: fixed;
 top: 0;
 left: 0;
 right: 0;
 bottom: 0;
 background: rgba(255,255,255,0.98);
 backdrop-filter: blur(20px);
 z-index: 200;
 display: flex;
 flex-direction: column;
 align-items: center;
 justify-content: center;
 gap: var(--spacing-xl);
 transform: translateX(100%);
 transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
 }

 .mobile-nav.open {
 transform: translateX(0);
 }

 .mobile-nav a {
 font-size: 1.2rem;
 font-weight: 600;
 color: var(--primary);
 }

 .mobile-nav .mobile-close {
 position: absolute;
 top: var(--spacing-lg);
 right: var(--spacing-lg);
 background: none;
 border: none;
 font-size: 1.8rem;
 color: var(--text);
 cursor: pointer;
 }

/* roulang page: category6 */
:root {
            --color-primary: #1a3c5e;
            --color-primary-light: #1f4d78;
            --color-primary-dark: #0f2a42;
            --color-accent: #00a8e8;
            --color-accent-hover: #0088c2;
            --color-accent-light: #e6f7fd;
            --color-bg: #ffffff;
            --color-bg-alt: #f6f9fc;
            --color-bg-dark: #0d1b2a;
            --color-text: #1a1d23;
            --color-text-soft: #5a5f6b;
            --color-text-light: #8b9099;
            --color-text-inverse: #ffffff;
            --color-border: #e4e8ed;
            --color-border-light: #eff2f5;
            --color-success: #10b981;
            --color-warning: #f59e0b;
            --color-card-shadow: 0 1px 3px rgba(13, 27, 42, 0.06), 0 4px 16px rgba(13, 27, 42, 0.05);
            --color-card-shadow-hover: 0 2px 8px rgba(13, 27, 42, 0.1), 0 8px 28px rgba(13, 27, 42, 0.08);
            --color-card-shadow-lg: 0 4px 16px rgba(13, 27, 42, 0.08), 0 12px 36px rgba(13, 27, 42, 0.06);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --spacing-xs: 6px;
            --spacing-sm: 12px;
            --spacing-md: 20px;
            --spacing-lg: 32px;
            --spacing-xl: 48px;
            --spacing-2xl: 64px;
            --spacing-3xl: 80px;
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Consolas', 'Monaco', monospace;
            --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-spring: 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
            --header-height: 64px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            text-rendering: optimizeLegibility;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.65;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            font-size: inherit;
        }

        input {
            font-family: inherit;
            font-size: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 600;
            color: var(--color-text);
        }

        .container {
            width: 100%;
            max-width: 1220px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        @media (min-width: 768px) {
            .container {
                padding: 0 var(--spacing-lg);
            }
        }
        @media (min-width: 1200px) {
            .container {
                padding: 0 var(--spacing-xl);
            }
        }

        /* ========== HEADER ========== */
        .header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border-light);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-smooth);
        }
        .header--scrolled {
            box-shadow: 0 1px 6px rgba(13, 27, 42, 0.08);
        }
        .header__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-lg);
            width: 100%;
        }
        .header__logo {
            font-weight: 700;
            font-size: 1.25rem;
            letter-spacing: -0.02em;
            color: var(--color-primary);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
            flex-shrink: 0;
        }
        .header__logo-icon {
            width: 32px;
            height: 32px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 0.8rem;
        }
        .header__nav {
            display: none;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
        }
        .header__nav a {
            display: inline-flex;
            align-items: center;
            padding: 7px 14px;
            border-radius: var(--radius-full);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-soft);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .header__nav a:hover {
            color: var(--color-primary);
            background: var(--color-bg-alt);
        }
        .header__nav a.active {
            color: var(--color-accent);
            background: var(--color-accent-light);
            font-weight: 600;
        }
        .header__nav a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
            border-radius: var(--radius-full);
        }
        .header__actions {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-shrink: 0;
        }
        .header__search-wrap {
            position: relative;
            display: none;
        }
        .header__search {
            padding: 9px 14px 9px 36px;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-full);
            font-size: 0.875rem;
            color: var(--color-text);
            background: var(--color-bg-alt);
            width: 200px;
            transition: all var(--transition-fast);
            outline: none;
        }
        .header__search:focus {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 3px rgba(0, 168, 232, 0.1);
            background: #fff;
            width: 240px;
        }
        .header__search-icon {
            position: absolute;
            left: 12px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--color-text-light);
            pointer-events: none;
            font-size: 0.85rem;
        }
        .header__cta {
            display: inline-flex;
            align-items: center;
            padding: 9px 18px;
            border-radius: var(--radius-full);
            font-size: 0.875rem;
            font-weight: 600;
            background: var(--color-accent);
            color: #fff;
            transition: all var(--transition-smooth);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }
        .header__cta:hover {
            background: var(--color-accent-hover);
            box-shadow: 0 4px 14px rgba(0, 168, 232, 0.3);
            transform: translateY(-1px);
        }
        .header__cta:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .header__cta:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }
        .header__hamburger {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            background: #fff;
            font-size: 1.3rem;
            color: var(--color-text);
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }
        .header__hamburger:hover {
            background: var(--color-bg-alt);
            border-color: var(--color-text-light);
        }
        .header__hamburger:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: #fff;
            z-index: 999;
            flex-direction: column;
            padding: var(--spacing-lg);
            gap: var(--spacing-sm);
            overflow-y: auto;
            border-top: 1px solid var(--color-border-light);
        }
        .mobile-menu--open {
            display: flex;
        }
        .mobile-menu a {
            display: block;
            padding: 14px 16px;
            border-radius: var(--radius-md);
            font-size: 1rem;
            font-weight: 500;
            color: var(--color-text);
            transition: all var(--transition-fast);
        }
        .mobile-menu a:hover {
            background: var(--color-bg-alt);
            color: var(--color-primary);
        }
        .mobile-menu a.active {
            color: var(--color-accent);
            background: var(--color-accent-light);
            font-weight: 600;
        }
        .mobile-menu__cta {
            display: block;
            text-align: center;
            padding: 13px 20px;
            border-radius: var(--radius-full);
            background: var(--color-accent);
            color: #fff !important;
            font-weight: 600;
            margin-top: var(--spacing-sm);
        }
        .mobile-menu__cta:hover {
            background: var(--color-accent-hover) !important;
        }

        @media (min-width: 1024px) {
            .header__nav {
                display: flex;
            }
            .header__search-wrap {
                display: block;
            }
            .header__hamburger {
                display: none;
            }
        }
        @media (min-width: 768px) and (max-width: 1023px) {
            .header__nav {
                display: none;
            }
            .header__search-wrap {
                display: none;
            }
            .header__hamburger {
                display: flex;
            }
        }
        @media (max-width: 767px) {
            .header__nav {
                display: none;
            }
            .header__search-wrap {
                display: none;
            }
            .header__hamburger {
                display: flex;
            }
            .header__cta {
                display: none;
            }
            .header__logo {
                font-size: 1.1rem;
            }
        }

        /* ========== MAIN ========== */
        .main {
            flex: 1;
        }

        /* ========== PAGE BANNER ========== */
        .page-banner {
            position: relative;
            padding: var(--spacing-3xl) 0;
            background: var(--color-bg-dark);
            background-image: url('assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            color: var(--color-text-inverse);
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 27, 42, 0.85) 0%, rgba(13, 27, 42, 0.55) 100%);
            z-index: 1;
        }
        .page-banner__content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }
        .page-banner__badge {
            display: inline-block;
            padding: 6px 14px;
            border-radius: var(--radius-full);
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(8px);
            font-size: 0.8rem;
            font-weight: 500;
            letter-spacing: 0.04em;
            margin-bottom: var(--spacing-md);
            color: #d0e8ff;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        .page-banner__title {
            font-size: 2.4rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: #fff;
            margin-bottom: var(--spacing-md);
            line-height: 1.2;
        }
        .page-banner__desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.7;
            margin-bottom: var(--spacing-lg);
            max-width: 560px;
        }
        .page-banner__actions {
            display: flex;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }
        @media (max-width: 767px) {
            .page-banner {
                padding: var(--spacing-2xl) 0;
                min-height: 280px;
            }
            .page-banner__title {
                font-size: 1.7rem;
            }
            .page-banner__desc {
                font-size: 0.95rem;
            }
        }

        /* ========== SECTION ========== */
        .section {
            padding: var(--spacing-2xl) 0;
        }
        .section--alt {
            background: var(--color-bg-alt);
        }
        .section--dark {
            background: var(--color-bg-dark);
            color: var(--color-text-inverse);
        }
        .section__header {
            text-align: center;
            margin-bottom: var(--spacing-xl);
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        .section__label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            color: var(--color-accent);
            text-transform: uppercase;
            margin-bottom: var(--spacing-xs);
        }
        .section__title {
            font-size: 1.8rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: var(--spacing-sm);
            color: var(--color-text);
        }
        .section--dark .section__title {
            color: #fff;
        }
        .section__desc {
            font-size: 1rem;
            color: var(--color-text-soft);
            line-height: 1.7;
        }
        .section--dark .section__desc {
            color: rgba(255, 255, 255, 0.7);
        }
        @media (max-width: 767px) {
            .section {
                padding: var(--spacing-xl) 0;
            }
            .section__title {
                font-size: 1.45rem;
            }
        }

        /* ========== CARDS GRID ========== */
        .cards-grid {
            display: grid;
            gap: var(--spacing-lg);
            grid-template-columns: 1fr;
        }
        @media (min-width: 520px) {
            .cards-grid--2 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 768px) {
            .cards-grid--3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .cards-grid--4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 1024px) {
            .cards-grid--3 {
                grid-template-columns: repeat(3, 1fr);
            }
            .cards-grid--4 {
                grid-template-columns: repeat(4, 1fr);
            }
        }

        /* ========== CARD ========== */
        .card {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
            box-shadow: var(--color-card-shadow);
        }
        .card:hover {
            box-shadow: var(--color-card-shadow-hover);
            transform: translateY(-3px);
        }
        .card__image {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
            background: var(--color-bg-alt);
        }
        .card__body {
            padding: var(--spacing-md) var(--spacing-lg);
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-xs);
        }
        .card__tag {
            display: inline-block;
            padding: 3px 10px;
            border-radius: var(--radius-full);
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            background: var(--color-accent-light);
            color: var(--color-accent);
            align-self: flex-start;
        }
        .card__title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--color-text);
            line-height: 1.35;
        }
        .card__text {
            font-size: 0.9rem;
            color: var(--color-text-soft);
            line-height: 1.6;
            flex: 1;
        }
        .card__footer {
            padding: 0 var(--spacing-lg) var(--spacing-lg);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
        }
        .card__link {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-accent);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--transition-fast);
        }
        .card__link:hover {
            gap: 8px;
            color: var(--color-accent-hover);
        }
        .card__link::after {
            content: '→';
            font-weight: 400;
        }
        .card--horizontal {
            flex-direction: row;
        }
        .card--horizontal .card__image {
            width: 200px;
            aspect-ratio: auto;
            min-height: 100%;
            flex-shrink: 0;
        }
        @media (max-width: 767px) {
            .card--horizontal {
                flex-direction: column;
            }
            .card--horizontal .card__image {
                width: 100%;
                aspect-ratio: 16 / 10;
            }
            .card__body {
                padding: var(--spacing-sm) var(--spacing-md);
            }
            .card__footer {
                padding: 0 var(--spacing-md) var(--spacing-md);
            }
        }

        /* ========== STAT CARDS ========== */
        .stat-grid {
            display: grid;
            gap: var(--spacing-lg);
            grid-template-columns: repeat(2, 1fr);
        }
        @media (min-width: 768px) {
            .stat-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }
        .stat-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            text-align: center;
            border: 1px solid var(--color-border-light);
            box-shadow: var(--color-card-shadow);
            transition: all var(--transition-smooth);
        }
        .stat-card:hover {
            box-shadow: var(--color-card-shadow-hover);
            transform: translateY(-2px);
        }
        .stat-card__icon {
            font-size: 2rem;
            margin-bottom: var(--spacing-sm);
            display: block;
        }
        .stat-card__value {
            font-size: 2.2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--color-primary);
            line-height: 1;
            margin-bottom: var(--spacing-xs);
        }
        .stat-card__label {
            font-size: 0.85rem;
            color: var(--color-text-soft);
            font-weight: 500;
        }
        .section--dark .stat-card {
            background: rgba(255, 255, 255, 0.04);
            border-color: rgba(255, 255, 255, 0.1);
        }
        .section--dark .stat-card__value {
            color: #fff;
        }
        .section--dark .stat-card__label {
            color: rgba(255, 255, 255, 0.65);
        }

        /* ========== TIMELINE ========== */
        .timeline {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-lg);
            position: relative;
            padding-left: 28px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 10px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--color-border);
            border-radius: 1px;
        }
        .timeline__item {
            position: relative;
            padding-left: var(--spacing-lg);
        }
        .timeline__item::before {
            content: '';
            position: absolute;
            left: -22px;
            top: 6px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--color-accent);
            border: 3px solid #fff;
            box-shadow: 0 0 0 3px var(--color-accent-light);
            z-index: 1;
        }
        .timeline__title {
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-text);
            margin-bottom: 2px;
        }
        .timeline__text {
            font-size: 0.9rem;
            color: var(--color-text-soft);
            line-height: 1.6;
        }

        /* ========== BUTTON ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            padding: 11px 22px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.9rem;
            letter-spacing: 0.01em;
            transition: all var(--transition-smooth);
            white-space: nowrap;
            cursor: pointer;
            text-align: center;
            line-height: 1.4;
        }
        .btn--primary {
            background: var(--color-accent);
            color: #fff;
        }
        .btn--primary:hover {
            background: var(--color-accent-hover);
            box-shadow: 0 4px 16px rgba(0, 168, 232, 0.35);
            transform: translateY(-2px);
        }
        .btn--primary:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn--outline {
            border: 2px solid var(--color-border);
            color: var(--color-text);
            background: #fff;
        }
        .btn--outline:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
            background: var(--color-accent-light);
        }
        .btn--ghost {
            color: var(--color-text-soft);
            background: transparent;
        }
        .btn--ghost:hover {
            background: var(--color-bg-alt);
            color: var(--color-text);
        }
        .btn--lg {
            padding: 14px 28px;
            font-size: 1rem;
            border-radius: var(--radius-xl);
        }
        .btn--sm {
            padding: 7px 14px;
            font-size: 0.8rem;
        }
        .btn:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }
        .btn--white {
            background: #fff;
            color: var(--color-primary);
            font-weight: 600;
        }
        .btn--white:hover {
            background: #f0f4f8;
            box-shadow: 0 4px 16px rgba(255, 255, 255, 0.3);
            transform: translateY(-2px);
        }

        /* ========== INFO ROW ========== */
        .info-row {
            display: grid;
            gap: var(--spacing-lg);
            grid-template-columns: 1fr;
            align-items: center;
        }
        @media (min-width: 768px) {
            .info-row {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-2xl);
            }
        }
        .info-row__image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--color-card-shadow-lg);
        }
        .info-row__image img {
            width: 100%;
            aspect-ratio: 4/3;
            object-fit: cover;
        }
        .info-row__content h3 {
            font-size: 1.35rem;
            margin-bottom: var(--spacing-sm);
        }
        .info-row__content p {
            color: var(--color-text-soft);
            line-height: 1.7;
            margin-bottom: var(--spacing-sm);
        }
        .info-row--reverse {
            direction: ltr;
        }
        @media (min-width: 768px) {
            .info-row--reverse .info-row__image {
                order: 2;
            }
            .info-row--reverse .info-row__content {
                order: 1;
            }
        }

        /* ========== PROJECT LIST ========== */
        .project-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }
        .project-item {
            display: flex;
            gap: var(--spacing-lg);
            background: #fff;
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            border: 1px solid var(--color-border-light);
            box-shadow: var(--color-card-shadow);
            transition: all var(--transition-smooth);
            align-items: flex-start;
        }
        .project-item:hover {
            box-shadow: var(--color-card-shadow-hover);
            transform: translateY(-2px);
        }
        .project-item__icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            background: var(--color-accent-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            flex-shrink: 0;
            color: var(--color-accent);
        }
        .project-item__info h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .project-item__info p {
            font-size: 0.9rem;
            color: var(--color-text-soft);
            line-height: 1.6;
        }
        .project-item__status {
            display: inline-block;
            padding: 3px 10px;
            border-radius: var(--radius-full);
            font-size: 0.72rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            margin-top: var(--spacing-xs);
        }
        .project-item__status--active {
            background: #d1fae5;
            color: #065f46;
        }
        .project-item__status--dev {
            background: #fef3c7;
            color: #92400e;
        }
        .project-item__status--plan {
            background: #e0e7ff;
            color: #3730a3;
        }
        @media (max-width: 520px) {
            .project-item {
                flex-direction: column;
                gap: var(--spacing-sm);
            }
            .project-item__icon {
                width: 40px;
                height: 40px;
                font-size: 1.2rem;
            }
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 60%, var(--color-primary-light) 100%);
            padding: var(--spacing-3xl) 0;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 168, 232, 0.2) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-section__inner {
            position: relative;
            z-index: 1;
            max-width: 600px;
            margin: 0 auto;
        }
        .cta-section__title {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.02em;
        }
        .cta-section__text {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: var(--spacing-lg);
            line-height: 1.7;
        }
        @media (max-width: 767px) {
            .cta-section {
                padding: var(--spacing-2xl) 0;
            }
            .cta-section__title {
                font-size: 1.4rem;
            }
        }

        /* ========== FOOTER ========== */
        .footer {
            background: var(--color-bg-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: var(--spacing-2xl) 0 var(--spacing-lg);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .footer__grid {
            display: grid;
            gap: var(--spacing-xl);
            grid-template-columns: 1fr;
        }
        @media (min-width: 520px) {
            .footer__grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 768px) {
            .footer__grid {
                grid-template-columns: 1.5fr 1fr 1fr 1fr;
                gap: var(--spacing-lg);
            }
        }
        .footer__brand {
            font-weight: 700;
            font-size: 1.2rem;
            color: #fff;
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.02em;
        }
        .footer__desc {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.85rem;
            line-height: 1.7;
        }
        .footer h4 {
            color: #fff;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            margin-bottom: var(--spacing-sm);
            text-transform: uppercase;
        }
        .footer ul {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.85rem;
            transition: color var(--transition-fast);
        }
        .footer ul li a:hover {
            color: #fff;
        }
        .footer__bottom {
            margin-top: var(--spacing-xl);
            padding-top: var(--spacing-lg);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-md);
            justify-content: space-between;
            align-items: center;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer__bottom a {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.8rem;
        }
        .footer__bottom a:hover {
            color: #fff;
        }
        .footer__disclaimer {
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.35);
            line-height: 1.6;
            margin-top: var(--spacing-md);
        }

        /* ========== UTILITY ========== */
        .text-center {
            text-align: center;
        }
        .mt-lg {
            margin-top: var(--spacing-lg);
        }
        .mt-xl {
            margin-top: var(--spacing-xl);
        }
        .mb-lg {
            margin-bottom: var(--spacing-lg);
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }