/* roulang page: index */
:root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --accent: #f59e0b;
            --bg: #f8fafc;
            --surface: #ffffff;
            --text: #1e293b;
            --muted: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-lg: 24px;
            --shadow-card: 0 2px 16px rgba(2, 6, 23, 0.06);
            --shadow-lift: 0 12px 32px rgba(2, 6, 23, 0.12);
            --container: 80rem;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: inherit;
        }

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

        input:focus,
        button:focus,
        a:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 1.25rem;
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
        }

        .nav-link {
            position: relative;
            display: inline-flex;
            align-items: center;
            padding: 0.5rem 0.875rem;
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--muted);
            border-radius: 999px;
            transition: color .2s, background .2s;
        }

        .nav-link:hover {
            color: var(--primary);
            background: var(--brand-50, #eef2ff);
        }

        .nav-link.active {
            color: var(--primary-dark);
            background: #eef2ff;
            font-weight: 600;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: #f1f5f9;
            border-radius: 999px;
            padding: 0.35rem 0.35rem 0.35rem 1rem;
            border: 1px solid transparent;
            transition: border .2s, background .2s;
        }

        .search-box:hover,
        .search-box:focus-within {
            border-color: var(--primary);
            background: #fff;
        }

        .search-box input {
            border: none;
            outline: none;
            background: transparent;
            font-size: 0.875rem;
            color: var(--text);
            width: 8.5rem;
        }

        .search-box button {
            width: 2rem;
            height: 2rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border: none;
            border-radius: 999px;
            background: var(--primary);
            color: #fff;
            cursor: pointer;
            transition: background .2s;
        }

        .search-box button:hover {
            background: var(--primary-dark);
        }

        .mobile-toggle {
            width: 2.5rem;
            height: 2.5rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 0.75rem;
            border: 1px solid var(--border);
            background: #fff;
            color: var(--text);
            cursor: pointer;
            transition: color .2s, border-color .2s;
        }

        .mobile-toggle:hover {
            color: var(--primary);
            border-color: var(--primary);
        }

        .mobile-menu {
            border-top: 1px solid var(--border);
            background: #fff;
        }

        .mobile-menu a {
            display: block;
            padding: 0.75rem 1.25rem;
            font-weight: 500;
            color: var(--muted);
            border-bottom: 1px solid #f1f5f9;
            transition: color .2s, background .2s;
        }

        .mobile-menu a:hover {
            color: var(--primary);
            background: var(--brand-50, #eef2ff);
        }

        .mobile-menu a.active {
            color: var(--primary-dark);
            background: #eef2ff;
        }

        /* Buttons */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.625rem 1.25rem;
            border-radius: 999px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 0.9375rem;
            border: 1px solid transparent;
            cursor: pointer;
            transition: transform .2s, box-shadow .2s, background .2s;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(79, 70, 229, 0.25);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.625rem 1.25rem;
            border-radius: 999px;
            background: transparent;
            color: var(--text);
            font-weight: 600;
            font-size: 0.9375rem;
            border: 1.5px solid var(--border);
            cursor: pointer;
            transition: all .2s;
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: #eef2ff;
        }

        .btn-white {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.75rem 1.75rem;
            border-radius: 999px;
            background: #fff;
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 0.9375rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
            transition: transform .2s, box-shadow .2s;
        }

        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(0, 0, 0, 0.2);
        }

        /* Hero */
        .hero {
            position: relative;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 6rem 0 5rem;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(15, 23, 42, 0.88) 0%, rgba(15, 23, 42, 0.62) 55%, rgba(79, 70, 229, 0.35) 100%);
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.375rem 1rem;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            font-size: 0.875rem;
            font-weight: 500;
            backdrop-filter: blur(6px);
        }

        .hero-search {
            display: flex;
            max-width: 34rem;
            background: #fff;
            border-radius: 999px;
            padding: 0.4rem 0.4rem 0.4rem 1.25rem;
            margin-top: 2rem;
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
        }

        .hero-search input {
            flex: 1;
            border: none;
            outline: none;
            background: transparent;
            font-size: 1rem;
            color: var(--text);
            min-width: 0;
        }

        .hero-search button {
            padding: 0.65rem 1.5rem;
            border: none;
            border-radius: 999px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            cursor: pointer;
            white-space: nowrap;
            transition: background .2s;
        }

        .hero-search button:hover {
            background: var(--primary-dark);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            margin-top: 2.5rem;
        }

        .hero-stats div {
            text-align: left;
        }

        .hero-stats strong {
            display: block;
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.1;
        }

        .hero-stats span {
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.7);
        }

        /* Section */
        .section {
            padding: 5rem 0;
        }

        .section-alt {
            background: #fff;
        }

        .section-head {
            text-align: center;
            max-width: 44rem;
            margin: 0 auto 3rem;
        }

        .section-head .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 0.375rem;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 0.75rem;
        }

        .section-head h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text);
            line-height: 1.25;
            margin: 0 0 0.75rem;
        }

        .section-head p {
            color: var(--muted);
            font-size: 1.0625rem;
        }

        /* Feature Cards */
        .feature-card {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 1.75rem 1.5rem;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            transition: transform .25s, box-shadow .25s, border-color .25s;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lift);
            border-color: #c7d2fe;
        }

        .feature-icon {
            width: 3.25rem;
            height: 3.25rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 1rem;
            background: #eef2ff;
            color: var(--primary);
            font-size: 1.4rem;
            margin-bottom: 1.25rem;
        }

        .feature-card h3 {
            font-size: 1.125rem;
            font-weight: 700;
            margin: 0 0 0.5rem;
        }

        .feature-card p {
            font-size: 0.9375rem;
            color: var(--muted);
            line-height: 1.6;
            margin: 0;
        }

        /* Category Cards */
        .category-card {
            position: relative;
            display: block;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform .3s, box-shadow .3s;
        }

        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lift);
        }

        .category-card img {
            width: 100%;
            height: 100%;
            min-height: 220px;
            object-fit: cover;
            transition: transform .4s;
        }

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

        .category-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 23, 42, 0.0) 20%, rgba(15, 23, 42, 0.75) 100%);
        }

        .category-content {
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            padding: 1.75rem;
            color: #fff;
        }

        .category-content h3 {
            font-size: 1.5rem;
            font-weight: 800;
            margin: 0 0 0.25rem;
        }

        .category-content p {
            font-size: 0.9375rem;
            color: rgba(255, 255, 255, 0.85);
            margin: 0 0 0.75rem;
        }

        .category-content span {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.9375rem;
            font-weight: 600;
            transition: gap .2s;
        }

        .category-content span:hover {
            gap: 0.75rem;
        }

        /* List Cards */
        .list-card {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            padding: 1.25rem;
            border-radius: var(--radius);
            background: #fff;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            transition: transform .2s, box-shadow .2s, border-color .2s;
        }

        .list-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-lift);
            border-color: #c7d2fe;
        }

        .list-icon {
            flex-shrink: 0;
            width: 3rem;
            height: 3rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 0.875rem;
            background: #eef2ff;
            color: var(--primary);
            font-size: 1.25rem;
        }

        .list-card h3 {
            font-size: 1rem;
            font-weight: 700;
            margin: 0.25rem 0 0.25rem;
            line-height: 1.4;
            color: var(--text);
            transition: color .2s;
        }

        .list-card:hover h3 {
            color: var(--primary);
        }

        .list-card p {
            font-size: 0.875rem;
            color: var(--muted);
            line-height: 1.55;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .list-card time {
            font-size: 0.8125rem;
            color: #94a3b8;
            white-space: nowrap;
        }

        .list-card .card-cat {
            display: inline-flex;
            align-items: center;
            padding: 0.1875rem 0.625rem;
            border-radius: 999px;
            background: #eef2ff;
            color: var(--primary-dark);
            font-size: 0.75rem;
            font-weight: 600;
        }

        /* Rank Card */
        .rank-card {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            padding: 1.75rem;
        }

        .rank-item {
            display: flex;
            align-items: center;
            gap: 0.875rem;
            padding: 0.875rem 0;
            border-bottom: 1px dashed #e2e8f0;
            transition: background .2s;
        }

        .rank-item:last-child {
            border-bottom: none;
        }

        .rank-item:hover {
            background: #fafbff;
            padding-left: 0.5rem;
            padding-right: 0.5rem;
            border-radius: 0.75rem;
        }

        .rank-num {
            flex-shrink: 0;
            width: 2rem;
            height: 2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 0.625rem;
            background: #e2e8f0;
            color: #475569;
            font-weight: 800;
            font-size: 0.875rem;
        }

        .rank-item:nth-child(1) .rank-num {
            background: #fef3c7;
            color: #b45309;
        }

        .rank-item:nth-child(2) .rank-num {
            background: #e2e8f0;
            color: #334155;
        }

        .rank-item:nth-child(3) .rank-num {
            background: #fde68a;
            color: #92400e;
        }

        .rank-info {
            flex: 1;
            min-width: 0;
        }

        .rank-info strong {
            display: block;
            font-size: 0.9375rem;
            font-weight: 700;
            color: var(--text);
        }

        .rank-info span {
            font-size: 0.8125rem;
            color: var(--muted);
        }

        .rank-tag {
            flex-shrink: 0;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.25rem 0.625rem;
            border-radius: 999px;
            background: #f1f5f9;
            color: #475569;
        }

        .rank-tag.hot {
            background: #fef3c7;
            color: #d97706;
        }

        /* Steps */
        .step-item {
            position: relative;
            text-align: center;
            padding: 2rem 1.25rem;
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            transition: transform .2s, box-shadow .2s;
        }

        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lift);
        }

        .step-num {
            width: 3.5rem;
            height: 3.5rem;
            margin: 0 auto 1.25rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 999px;
            background: linear-gradient(135deg, #6366f1, #8b5cf6);
            color: #fff;
            font-size: 1.125rem;
            font-weight: 800;
            box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
        }

        .step-item h4 {
            font-size: 1.0625rem;
            font-weight: 700;
            margin: 0 0 0.5rem;
        }

        .step-item p {
            font-size: 0.875rem;
            color: var(--muted);
            line-height: 1.6;
            margin: 0;
        }

        /* Feature Banner */
        .feature-band {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background-size: cover;
            background-position: center;
            min-height: 320px;
        }

        .feature-band-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.5));
        }

        .feature-band-content {
            position: relative;
            z-index: 2;
            padding: 3rem;
            max-width: 36rem;
            color: #fff;
        }

        .feature-band-content h3 {
            font-size: 1.875rem;
            font-weight: 800;
            margin: 0 0 1rem;
        }

        .feature-band-content p {
            font-size: 1rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.85);
            margin: 0 0 1.5rem;
        }

        .feature-list {
            list-style: none;
            padding: 0;
            margin: 0 0 1.75rem;
        }

        .feature-list li {
            display: flex;
            align-items: center;
            gap: 0.625rem;
            padding: 0.375rem 0;
            font-size: 0.9375rem;
            color: rgba(255, 255, 255, 0.92);
        }

        .feature-list li i {
            color: #a5b4fc;
        }

        /* FAQ */
        .faq-item {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            margin-bottom: 1rem;
            transition: border-color .2s, box-shadow .2s;
        }

        .faq-item:hover {
            border-color: #c7d2fe;
            box-shadow: var(--shadow-lift);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.25rem 1.5rem;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            list-style: none;
            color: var(--text);
            transition: color .2s;
        }

        .faq-item summary:hover {
            color: var(--primary);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.875rem;
            color: #94a3b8;
            transition: transform .25s;
        }

        .faq-item details[open] summary::after {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-item .faq-body {
            padding: 0 1.5rem 1.25rem;
            color: var(--muted);
            font-size: 0.9375rem;
            line-height: 1.7;
        }

        /* CTA */
        .cta-band {
            position: relative;
            overflow: hidden;
            border-radius: var(--radius-lg);
            padding: 4.5rem 3rem;
            background-size: cover;
            background-position: center;
            text-align: center;
            color: #fff;
        }

        .cta-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(79, 70, 229, 0.9), rgba(15, 23, 42, 0.82));
        }

        .cta-band h2 {
            position: relative;
            z-index: 2;
            font-size: 2rem;
            font-weight: 800;
            margin: 0 0 0.75rem;
        }

        .cta-band p {
            position: relative;
            z-index: 2;
            font-size: 1.125rem;
            color: rgba(255, 255, 255, 0.85);
            margin: 0 0 1.75rem;
        }

        .cta-band .btn-white {
            position: relative;
            z-index: 2;
        }

        /* Footer */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding-top: 4rem;
            margin-top: 5rem;
        }

        .site-footer h4 {
            color: #fff;
            font-size: 1.0625rem;
            font-weight: 700;
            margin: 0 0 1rem;
        }

        .site-footer a {
            display: block;
            color: #94a3b8;
            padding: 0.3rem 0;
            font-size: 0.9375rem;
            transition: color .2s, padding-left .2s;
        }

        .site-footer a:hover {
            color: #e0e7ff;
            padding-left: 0.35rem;
        }

        .footer-brand p {
            font-size: 0.9375rem;
            line-height: 1.7;
            margin: 1rem 0 0;
        }

        .footer-social {
            display: flex;
            gap: 0.75rem;
            margin-top: 1.25rem;
        }

        .footer-social a {
            width: 2.25rem;
            height: 2.25rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.08);
            color: #cbd5e1;
            padding: 0;
            transition: background .2s, color .2s;
        }

        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            padding-left: 0;
        }

        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 3rem;
            padding: 1.5rem 0;
            text-align: center;
            font-size: 0.875rem;
            color: #64748b;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .hero {
                padding: 4rem 0 3rem;
            }

            .hero-stats {
                gap: 1.5rem;
            }

            .hero-stats strong {
                font-size: 1.5rem;
            }

            .section {
                padding: 3.5rem 0;
            }

            .section-head h2 {
                font-size: 1.625rem;
            }

            .feature-band-content {
                padding: 2rem;
            }

            .cta-band {
                padding: 3rem 1.5rem;
            }

            .cta-band h2 {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 520px) {
            .hero-search {
                flex-direction: column;
                border-radius: 1.25rem;
                padding: 0.75rem;
            }

            .hero-search button {
                width: 100%;
                margin-top: 0.5rem;
            }

            .hero-stats {
                gap: 1rem;
                justify-content: space-between;
            }

            .category-content {
                padding: 1.25rem;
            }

            .category-content h3 {
                font-size: 1.25rem;
            }

            .feature-band-content {
                padding: 1.5rem;
            }

            .list-card {
                flex-direction: column;
            }

            .list-card time {
                white-space: normal;
            }
        }

/* roulang page: category1 */
:root {
            --brand-50: #eef2ff;
            --brand-100: #e0e7ff;
            --brand-200: #c7d2fe;
            --brand-500: #6366f1;
            --brand-600: #4f46e5;
            --brand-700: #4338ca;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --surface: #ffffff;
            --bg: #f8fafc;
            --text: #0f172a;
            --text-secondary: #64748b;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, .06);
            --shadow: 0 4px 20px rgba(15, 23, 42, .08);
            --shadow-lg: 0 12px 40px rgba(15, 23, 42, .1);
        }

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

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.65;
            font-size: 16px;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease;
        }

        button,
        input {
            font-family: inherit;
            outline: none;
            border: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--brand-500);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 8px rgba(15, 23, 42, .04);
        }

        .site-header .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 66px;
            gap: 16px;
        }

        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 900;
            box-shadow: 0 4px 12px rgba(79, 70, 229, .3);
        }

        .logo-text {
            font-size: 18px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -.01em;
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all .2s ease;
        }

        .nav-link:hover {
            color: var(--brand-600);
            background: var(--brand-50);
        }

        .nav-link.active {
            color: var(--brand-600);
            background: var(--brand-50);
            font-weight: 600;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .search-box {
            display: flex;
            align-items: center;
            gap: 8px;
            background: #f1f5f9;
            border-radius: 999px;
            padding: 8px 14px;
            border: 1px solid transparent;
            transition: all .25s ease;
            width: 200px;
        }

        .search-box:focus-within {
            border-color: var(--brand-300);
            background: #fff;
            box-shadow: 0 0 0 4px var(--brand-50);
        }

        .search-box input {
            font-size: 14px;
            color: var(--text);
            width: 100%;
            background: transparent;
        }

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

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 9px 20px;
            border-radius: 999px;
            background: var(--brand-600);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            transition: all .25s ease;
            box-shadow: 0 4px 14px rgba(79, 70, 229, .25);
            white-space: nowrap;
        }

        .btn-primary:hover {
            background: var(--brand-700);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(79, 70, 229, .35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(79, 70, 229, .25);
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 9px 20px;
            border-radius: 999px;
            border: 1.5px solid var(--border);
            color: var(--text);
            font-size: 14px;
            font-weight: 600;
            background: #fff;
            transition: all .25s ease;
        }

        .btn-ghost:hover {
            border-color: var(--brand-300);
            color: var(--brand-600);
            background: var(--brand-50);
        }

        .mobile-menu-btn {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: #f1f5f9;
            color: var(--text);
            font-size: 18px;
            align-items: center;
            justify-content: center;
            transition: background .2s;
        }

        .mobile-menu-btn:hover {
            background: var(--brand-50);
            color: var(--brand-600);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 66px;
            left: 0;
            right: 0;
            z-index: 99;
            background: #fff;
            border-bottom: 1px solid var(--border);
            box-shadow: 0 20px 40px rgba(15, 23, 42, .1);
            padding: 16px 20px;
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-menu .mobile-nav-link {
            display: block;
            padding: 14px 16px;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all .2s;
        }

        .mobile-menu .mobile-nav-link:hover {
            background: var(--brand-50);
            color: var(--brand-600);
        }

        .mobile-menu .mobile-nav-link.active {
            background: var(--brand-50);
            color: var(--brand-600);
            font-weight: 600;
        }

        /* ===== Hero ===== */
        .page-hero {
            position: relative;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            padding: 88px 0 72px;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, .82) 0%, rgba(30, 27, 75, .65) 45%, rgba(79, 70, 229, .35) 100%);
        }

        .page-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 999px;
            background: rgba(255, 255, 255, .12);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, .2);
            color: #fff;
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 20px;
        }

        .hero-badge i {
            color: var(--accent);
        }

        .page-hero h1 {
            font-size: 44px;
            line-height: 1.15;
            font-weight: 800;
            color: #fff;
            letter-spacing: -.02em;
            margin-bottom: 16px;
        }

        .page-hero p.hero-lead {
            font-size: 17px;
            line-height: 1.7;
            color: rgba(255, 255, 255, .85);
            margin-bottom: 28px;
            max-width: 560px;
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 28px;
            margin-top: 12px;
        }

        .hero-stat {
            text-align: left;
        }

        .hero-stat .num {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }

        .hero-stat .label {
            font-size: 13px;
            color: rgba(255, 255, 255, .7);
            margin-top: 4px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 32px;
        }

        .hero-actions .btn-primary {
            background: #fff;
            color: var(--brand-600);
            box-shadow: 0 4px 20px rgba(0, 0, 0, .2);
        }

        .hero-actions .btn-primary:hover {
            background: var(--brand-50);
            transform: translateY(-1px);
        }

        .hero-actions .btn-hero-ghost {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 999px;
            border: 1.5px solid rgba(255, 255, 255, .4);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            transition: all .25s;
            background: rgba(255, 255, 255, .08);
            backdrop-filter: blur(6px);
        }

        .hero-actions .btn-hero-ghost:hover {
            background: rgba(255, 255, 255, .18);
            border-color: rgba(255, 255, 255, .6);
        }

        /* ===== Ticker ===== */
        .ticker-bar {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 12px 0;
            overflow: hidden;
        }

        .ticker-wrap {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .ticker-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: linear-gradient(135deg, #f59e0b, #ef4444);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 999px;
            flex-shrink: 0;
            letter-spacing: .02em;
        }

        .ticker-track {
            flex: 1;
            overflow: hidden;
            position: relative;
            height: 28px;
        }

        .ticker-items {
            display: flex;
            gap: 40px;
            white-space: nowrap;
            animation: tickerScroll 30s linear infinite;
            position: absolute;
            top: 0;
            left: 0;
            height: 28px;
            align-items: center;
        }

        .ticker-items span {
            font-size: 14px;
            color: var(--text-secondary);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .ticker-items span i {
            color: var(--brand-500);
            font-size: 12px;
        }

        @keyframes tickerScroll {
            0% { transform: translateX(0); }
            100% { transform: translateX(-50%); }
        }

        /* ===== Section title ===== */
        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 16px;
            margin-bottom: 28px;
            flex-wrap: wrap;
        }

        .section-head .section-title {
            font-size: 26px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -.01em;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .section-title-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--brand-50);
            color: var(--brand-600);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
        }

        .section-head .section-sub {
            color: var(--text-muted);
            font-size: 14px;
        }

        .section-link {
            font-size: 14px;
            color: var(--brand-600);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap .2s;
        }

        .section-link:hover {
            gap: 10px;
        }

        /* ===== Filter tabs ===== */
        .filter-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 28px;
        }

        .filter-tab {
            padding: 7px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            background: #fff;
            border: 1px solid var(--border);
            color: var(--text-secondary);
            transition: all .2s ease;
        }

        .filter-tab:hover {
            border-color: var(--brand-300);
            color: var(--brand-600);
            background: var(--brand-50);
        }

        .filter-tab.active {
            background: var(--brand-600);
            color: #fff;
            border-color: var(--brand-600);
            box-shadow: 0 4px 14px rgba(79, 70, 229, .25);
        }

        /* ===== News card ===== */
        .news-card {
            background: var(--surface);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all .3s cubic-bezier(.4, 0, .2, 1);
        }

        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }

        .news-card .card-cover {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
        }

        .news-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .news-card:hover .card-cover img {
            transform: scale(1.05);
        }

        .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 2;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(255, 255, 255, .92);
            color: var(--brand-600);
            backdrop-filter: blur(4px);
            box-shadow: 0 2px 8px rgba(0, 0, 0, .08);
        }

        .card-hot {
            position: absolute;
            top: 12px;
            right: 12px;
            z-index: 2;
            padding: 4px 10px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 700;
            background: linear-gradient(135deg, #f59e0b, #ef4444);
            color: #fff;
            box-shadow: 0 2px 10px rgba(239, 68, 68, .35);
        }

        .news-card .card-body {
            padding: 18px;
        }

        .news-card .card-title {
            font-size: 16px;
            font-weight: 700;
            line-height: 1.5;
            color: var(--text);
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color .2s;
        }

        .news-card:hover .card-title {
            color: var(--brand-600);
        }

        .news-card .card-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
        }

        .news-card .card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            color: var(--text-muted);
            padding-top: 12px;
            border-top: 1px solid #f1f5f9;
        }

        /* ===== Ranking ===== */
        .rank-panel {
            background: #fff;
            border-radius: 20px;
            border: 1px solid var(--border);
            padding: 24px;
            box-shadow: var(--shadow-sm);
        }

        .rank-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 0;
            border-bottom: 1px solid #f1f5f9;
            transition: all .2s ease;
            cursor: pointer;
        }

        .rank-item:last-child {
            border-bottom: none;
        }

        .rank-item:hover {
            padding-left: 8px;
            padding-right: 8px;
            background: var(--brand-50);
            border-radius: 12px;
        }

        .rank-num {
            width: 32px;
            font-size: 18px;
            font-weight: 800;
            color: var(--text-muted);
            flex-shrink: 0;
            text-align: center;
        }

        .rank-item:nth-child(1) .rank-num,
        .rank-item:nth-child(2) .rank-num,
        .rank-item:nth-child(3) .rank-num {
            color: var(--accent);
        }

        .rank-thumb {
            width: 72px;
            height: 54px;
            border-radius: 10px;
            object-fit: cover;
            flex-shrink: 0;
        }

        .rank-info {
            flex: 1;
            min-width: 0;
        }

        .rank-info .rank-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            margin-bottom: 2px;
            transition: color .2s;
        }

        .rank-item:hover .rank-title {
            color: var(--brand-600);
        }

        .rank-info .rank-meta {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            gap: 12px;
        }

        /* ===== Feature card ===== */
        .feature-card {
            position: relative;
            border-radius: 20px;
            overflow: hidden;
            border: 1px solid var(--border);
            transition: all .3s ease;
            min-height: 260px;
            display: flex;
            align-items: flex-end;
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        .feature-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .feature-card:hover img {
            transform: scale(1.05);
        }

        .feature-card::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 20%, rgba(15, 23, 42, .75) 100%);
        }

        .feature-card .feature-body {
            position: relative;
            z-index: 2;
            padding: 24px;
            color: #fff;
            width: 100%;
        }

        .feature-card .feature-tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 999px;
            background: rgba(255, 255, 255, .2);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, .25);
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .feature-card .feature-title {
            font-size: 20px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 6px;
        }

        .feature-card .feature-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, .8);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ===== Feed list ===== */
        .feed-item {
            display: flex;
            gap: 16px;
            padding: 16px;
            border-radius: 14px;
            background: #fff;
            border: 1px solid var(--border);
            transition: all .2s ease;
            align-items: center;
        }

        .feed-item:hover {
            border-color: var(--brand-200);
            box-shadow: var(--shadow);
            transform: translateX(4px);
        }

        .feed-item .feed-thumb {
            width: 96px;
            height: 68px;
            border-radius: 10px;
            object-fit: cover;
            flex-shrink: 0;
        }

        .feed-item .feed-content {
            flex: 1;
            min-width: 0;
        }

        .feed-item .feed-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            margin-bottom: 4px;
            transition: color .2s;
        }

        .feed-item:hover .feed-title {
            color: var(--brand-600);
        }

        .feed-item .feed-desc {
            font-size: 13px;
            color: var(--text-secondary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .feed-item .feed-date {
            font-size: 13px;
            color: var(--text-muted);
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            background: #fff;
            border-radius: 20px;
            border: 1px solid var(--border);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .faq-item {
            border-bottom: 1px solid var(--border);
        }

        .faq-item:last-child {
            border-bottom: none;
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            transition: all .2s;
        }

        .faq-question:hover {
            background: var(--brand-50);
        }

        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--brand-50);
            color: var(--brand-600);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            flex-shrink: 0;
            transition: all .3s;
        }

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
            background: var(--brand-600);
            color: #fff;
        }

        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease, padding .35s ease;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            padding-top: 4px;
            border-top: 1px dashed var(--border);
        }

        /* ===== CTA ===== */
        .cta-section {
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            position: relative;
            border-radius: 24px;
            overflow: hidden;
            padding: 56px 40px;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(79, 70, 229, .92) 0%, rgba(124, 58, 237, .8) 100%);
        }

        .cta-section .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 560px;
            margin: 0 auto;
        }

        .cta-section h2 {
            font-size: 30px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -.01em;
        }

        .cta-section p {
            font-size: 16px;
            color: rgba(255, 255, 255, .85);
            margin-bottom: 24px;
        }

        .cta-section .btn-primary {
            background: #fff;
            color: var(--brand-600);
            box-shadow: 0 8px 24px rgba(0, 0, 0, .2);
            font-size: 15px;
            padding: 12px 28px;
        }

        .cta-section .btn-primary:hover {
            background: var(--brand-50);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 64px 0 0;
            margin-top: 64px;
        }

        .site-footer h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 18px;
            letter-spacing: .02em;
        }

        .site-footer a {
            display: block;
            padding: 6px 0;
            font-size: 14px;
            color: #94a3b8;
            transition: all .2s;
        }

        .site-footer a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: #94a3b8;
            margin-top: 14px;
            max-width: 260px;
        }

        .footer-social {
            display: flex;
            gap: 10px;
            margin-top: 20px;
        }

        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: rgba(255, 255, 255, .08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #94a3b8;
            font-size: 16px;
            transition: all .25s;
            padding: 0;
        }

        .footer-social a:hover {
            background: var(--brand-600);
            color: #fff;
            padding: 0;
            transform: translateY(-2px);
        }

        .site-footer .copyright {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 24px 0;
            margin-top: 48px;
            text-align: center;
            font-size: 14px;
            color: #64748b;
        }

        /* ===== Section spacing ===== */
        .section-block {
            padding: 56px 0;
        }

        .section-block-alt {
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .page-hero h1 {
                font-size: 36px;
            }
            .search-box {
                width: 140px;
            }
            .section-block {
                padding: 44px 0;
            }
        }

        @media (max-width: 768px) {
            .main-nav,
            .search-box {
                display: none !important;
            }
            .mobile-menu-btn {
                display: flex;
            }
            .header-actions .btn-primary {
                display: none;
            }
            .page-hero {
                padding: 60px 0 48px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .page-hero p.hero-lead {
                font-size: 15px;
            }
            .hero-stats {
                gap: 18px;
            }
            .hero-stat .num {
                font-size: 22px;
            }
            .section-block {
                padding: 36px 0;
            }
            .section-head .section-title {
                font-size: 22px;
            }
            .cta-section {
                padding: 40px 24px;
            }
            .cta-section h2 {
                font-size: 24px;
            }
            .rank-thumb {
                width: 60px;
                height: 46px;
            }
            .feature-card {
                min-height: 220px;
            }
            .feed-item .feed-thumb {
                width: 80px;
                height: 60px;
            }
            .feed-item .feed-date {
                display: none;
            }
        }

        @media (max-width: 520px) {
            .logo-text {
                font-size: 16px;
            }
            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 16px;
            }
            .page-hero h1 {
                font-size: 24px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-hero-ghost {
                justify-content: center;
            }
            .hero-stat .num {
                font-size: 20px;
            }
            .section-head .section-title {
                font-size: 19px;
            }
            .filter-tabs {
                gap: 6px;
            }
            .filter-tab {
                padding: 6px 14px;
                font-size: 13px;
            }
            .news-card .card-body {
                padding: 14px;
            }
            .feed-item {
                padding: 12px;
            }
            .feed-item .feed-thumb {
                width: 64px;
                height: 48px;
            }
            .rank-panel {
                padding: 16px;
            }
            .faq-question {
                padding: 16px;
                font-size: 15px;
            }
            .faq-answer,
            .faq-item.open .faq-answer {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

/* roulang page: article */
:root {
            --primary: #4f46e5;
            --primary-dark: #4338ca;
            --accent: #f59e0b;
            --bg: #ffffff;
            --bg-muted: #f8fafc;
            --text: #0f172a;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.10);
        }
        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text);
            background: var(--bg);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            cursor: pointer;
        }
        input:focus {
            outline: none;
        }

        .site-header {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid #f1f5f9;
            position: sticky;
            top: 0;
            z-index: 50;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 0.5rem 0.9rem;
            border-radius: 9999px;
            font-size: 0.925rem;
            font-weight: 500;
            color: #334155;
            transition: all 0.2s ease;
        }
        .nav-link:hover {
            color: var(--primary);
            background: #eef2ff;
        }
        .nav-link.active {
            color: var(--primary);
            background: #eef2ff;
            font-weight: 700;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.65rem 1.5rem;
            border-radius: 9999px;
            background: var(--primary);
            color: #fff;
            font-size: 0.9rem;
            font-weight: 700;
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
            transition: all 0.2s ease;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
            transform: translateY(-2px);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.6rem 1.4rem;
            border-radius: 9999px;
            border: 1.5px solid #e2e8f0;
            color: #334155;
            font-size: 0.9rem;
            font-weight: 600;
            background: #fff;
            transition: all 0.2s ease;
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: #f8fafc;
        }
        .btn-xs {
            padding: 0.45rem 1.1rem;
            font-size: 0.82rem;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            padding: 0.3rem 1rem;
            border-radius: 9999px;
            background: var(--primary);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.02em;
        }
        .badge-small {
            padding: 0.2rem 0.7rem;
            font-size: 0.7rem;
        }

        .article-card {
            display: block;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all 0.25s ease;
        }
        .article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: #c7d2fe;
        }
        .card-img-wrap {
            overflow: hidden;
        }
        .article-card:hover .card-img-wrap img {
            transform: scale(1.04);
        }
        .article-card .card-img-wrap img {
            transition: transform 0.4s ease;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.3rem 1rem;
            border-radius: 9999px;
            background: #eef2ff;
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 700;
        }
        .section-tag::before {
            content: "";
            width: 0.4rem;
            height: 0.4rem;
            border-radius: 50%;
            background: currentColor;
        }

        .sidebar-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
        }
        .sidebar-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: #0f172a;
            padding: 1.25rem 1.5rem 0;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .sidebar-title i {
            color: var(--primary);
        }
        .sidebar-list a {
            display: flex;
            gap: 0.9rem;
            padding: 0.75rem 1.5rem;
            transition: background 0.2s ease;
            align-items: center;
        }
        .sidebar-list a:hover {
            background: #f8fafc;
        }
        .sidebar-list .rank {
            flex-shrink: 0;
            width: 1.75rem;
            height: 1.75rem;
            border-radius: 8px;
            background: #eef2ff;
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .tag-cloud {
            padding: 1rem 1.5rem 1.5rem;
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .tag-link {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            padding: 0.35rem 0.9rem;
            border-radius: 9999px;
            background: #f8fafc;
            border: 1px solid #e2e8f0;
            font-size: 0.8rem;
            font-weight: 500;
            color: #334155;
            transition: all 0.2s ease;
        }
        .tag-link:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .cta-section {
            background: linear-gradient(135deg, #312e81 0%, #4f46e5 50%, #7c3aed 100%);
            border-radius: 24px;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
        }

        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 4rem 0 2rem;
            margin-top: auto;
        }
        .site-footer h4 {
            color: #f1f5f9;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        .site-footer a {
            display: block;
            color: #94a3b8;
            padding: 0.3rem 0;
            font-size: 0.9rem;
            transition: color 0.2s ease;
        }
        .site-footer a:hover {
            color: #fff;
        }
        .footer-brand p {
            color: #94a3b8;
            font-size: 0.9rem;
            line-height: 1.7;
            margin-top: 1rem;
        }
        .footer-social {
            display: flex;
            gap: 0.75rem;
            margin-top: 1.25rem;
        }
        .footer-social a {
            width: 2.4rem;
            height: 2.4rem;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #cbd5e1;
            font-size: 1rem;
            transition: all 0.2s ease;
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 3rem;
            padding-top: 1.5rem;
            text-align: center;
            font-size: 0.85rem;
            color: #64748b;
        }

        .article-body {
            font-size: 1.0625rem;
            line-height: 1.85;
            color: #1e293b;
        }
        .article-body h2 {
            font-size: 1.6rem;
            font-weight: 800;
            color: #0f172a;
            margin-top: 2.2rem;
            margin-bottom: 1rem;
            padding-bottom: 0.6rem;
            border-bottom: 2px solid #eef2ff;
            line-height: 1.35;
        }
        .article-body h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: #0f172a;
            margin-top: 1.8rem;
            margin-bottom: 0.8rem;
            line-height: 1.4;
        }
        .article-body h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #0f172a;
            margin-top: 1.5rem;
            margin-bottom: 0.5rem;
        }
        .article-body p {
            margin: 1rem 0;
        }
        .article-body a {
            color: #4f46e5;
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body a:hover {
            color: #4338ca;
        }
        .article-body ul {
            list-style: disc;
            padding-left: 1.5rem;
            margin: 1rem 0;
        }
        .article-body ol {
            list-style: decimal;
            padding-left: 1.5rem;
            margin: 1rem 0;
        }
        .article-body li {
            margin: 0.4rem 0;
        }
        .article-body img {
            border-radius: 12px;
            margin: 1.5rem 0;
            box-shadow: var(--shadow);
        }
        .article-body blockquote {
            border-left: 4px solid #4f46e5;
            background: #eef2ff;
            padding: 1rem 1.5rem;
            border-radius: 0 12px 12px 0;
            margin: 1.5rem 0;
            color: #334155;
            font-style: italic;
        }
        .article-body code {
            background: #f1f5f9;
            padding: 0.15rem 0.45rem;
            border-radius: 6px;
            font-size: 0.9em;
            color: #be185d;
        }
        .article-body pre {
            background: #0f172a;
            color: #e2e8f0;
            padding: 1.25rem;
            border-radius: 12px;
            overflow-x: auto;
            margin: 1.5rem 0;
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .article-body pre code {
            background: none;
            color: inherit;
            padding: 0;
        }
        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.95rem;
        }
        .article-body th,
        .article-body td {
            border: 1px solid #e2e8f0;
            padding: 0.75rem 1rem;
            text-align: left;
        }
        .article-body th {
            background: #f8fafc;
            font-weight: 700;
        }
        .article-body hr {
            border: none;
            border-top: 1px solid #e2e8f0;
            margin: 2rem 0;
        }
        .article-body iframe {
            max-width: 100%;
            border-radius: 12px;
        }

        .breadcrumb-bar {
            background: #f8fafc;
            border-bottom: 1px solid #e2e8f0;
        }

        .line-clamp-1 {
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .line-clamp-2 {
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        @media (max-width: 768px) {
            .article-body h2 {
                font-size: 1.35rem;
            }
            .article-body h3 {
                font-size: 1.15rem;
            }
            .article-body {
                font-size: 1rem;
            }
            .sidebar-card .sidebar-list a {
                padding-left: 1.1rem;
                padding-right: 1.1rem;
            }
            .cta-section {
                border-radius: 20px;
            }
        }

        @media (max-width: 520px) {
            .tag-cloud {
                padding: 0.9rem 1.1rem 1.2rem;
            }
            .sidebar-title {
                padding-left: 1.1rem;
            }
            .footer-social a {
                width: 2.2rem;
                height: 2.2rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #4f46e5;
            --primary-dark: #4338ca;
            --secondary: #0ea5e9;
            --accent: #f59e0b;
            --success: #10b981;
            --bg: #f8fafc;
            --surface: #ffffff;
            --text: #0f172a;
            --text-weak: #64748b;
            --border: #e2e8f0;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, .06);
            --shadow-md: 0 4px 20px rgba(15, 23, 42, .07);
            --shadow-lg: 0 12px 40px rgba(15, 23, 42, .12);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        button {
            cursor: pointer;
            font-family: inherit;
        }

        .nav-link {
            position: relative;
            display: inline-flex;
            align-items: center;
            padding: .5rem .95rem;
            border-radius: 9999px;
            font-size: .875rem;
            font-weight: 600;
            color: #475569;
            transition: all .2s ease;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(79, 70, 229, .06);
        }
        .nav-link.active {
            color: var(--primary);
            background: rgba(79, 70, 229, .1);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 3px;
            border-radius: 2px;
            background: var(--primary);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            padding: .625rem 1.25rem;
            border-radius: 9999px;
            background: var(--primary);
            color: #fff;
            font-size: .875rem;
            font-weight: 700;
            border: none;
            transition: all .2s ease;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(79, 70, 229, .35);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-light {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            padding: .625rem 1.25rem;
            border-radius: 9999px;
            background: #fff;
            color: var(--text);
            font-size: .875rem;
            font-weight: 700;
            border: 1px solid rgba(255, 255, 255, .3);
            backdrop-filter: blur(8px);
            transition: all .2s ease;
        }
        .btn-light:hover {
            background: rgba(255, 255, 255, .92);
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(0, 0, 0, .18);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: .35rem;
            padding: .3rem .75rem;
            border-radius: 9999px;
            font-size: .75rem;
            font-weight: 700;
            background: rgba(255, 255, 255, .15);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, .25);
            backdrop-filter: blur(6px);
        }

        .section-padding {
            padding: 4.5rem 1.5rem;
        }

        .section-title {
            font-size: 1.875rem;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -.02em;
            color: var(--text);
        }

        .section-subtitle {
            font-size: .95rem;
            color: var(--text-weak);
            margin-top: .5rem;
        }

        .filter-tag {
            display: inline-flex;
            align-items: center;
            gap: .4rem;
            padding: .45rem 1.1rem;
            border-radius: 9999px;
            font-size: .8125rem;
            font-weight: 600;
            background: #fff;
            border: 1px solid var(--border);
            color: #475569;
            transition: all .2s ease;
            cursor: pointer;
            user-select: none;
        }
        .filter-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }
        .filter-tag.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(79, 70, 229, .3);
        }

        .rank-card {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 1rem 1.25rem;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            transition: all .25s ease;
        }
        .rank-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            border-color: rgba(79, 70, 229, .25);
        }
        .rank-number {
            width: 2.25rem;
            height: 2.25rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            font-weight: 800;
            font-size: 1rem;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            flex-shrink: 0;
        }
        .rank-card:nth-child(1) .rank-number {
            background: linear-gradient(135deg, #f59e0b, #f97316);
        }
        .rank-card:nth-child(2) .rank-number {
            background: linear-gradient(135deg, #94a3b8, #64748b);
        }
        .rank-card:nth-child(3) .rank-number {
            background: linear-gradient(135deg, #d97706, #b45309);
        }

        .review-card {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all .3s ease;
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .review-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(79, 70, 229, .15);
        }
        .review-card .cover {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }
        .review-card .cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .review-card:hover .cover img {
            transform: scale(1.04);
        }
        .review-card .cover-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(15, 23, 42, .55));
        }
        .rating-badge {
            position: absolute;
            top: .75rem;
            right: .75rem;
            display: inline-flex;
            align-items: center;
            gap: .3rem;
            padding: .3rem .65rem;
            border-radius: 9999px;
            background: rgba(15, 23, 42, .75);
            backdrop-filter: blur(8px);
            color: #fbbf24;
            font-size: .75rem;
            font-weight: 700;
        }

        .flow-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            border: 1px solid var(--border);
            text-align: center;
            transition: all .3s ease;
            position: relative;
            overflow: hidden;
        }
        .flow-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: opacity .3s ease;
        }
        .flow-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .flow-card:hover::before {
            opacity: 1;
        }
        .flow-step {
            width: 3rem;
            height: 3rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 9999px;
            background: rgba(79, 70, 229, .1);
            color: var(--primary);
            font-weight: 800;
            font-size: 1.125rem;
            margin: 0 auto 1rem;
        }

        .featured-scroll {
            display: grid;
            grid-auto-flow: column;
            grid-auto-columns: minmax(280px, 300px);
            gap: 1.25rem;
            overflow-x: auto;
            padding-bottom: 1rem;
            scroll-snap-type: x mandatory;
            scrollbar-width: thin;
            scrollbar-color: #cbd5e1 transparent;
        }
        .featured-scroll::-webkit-scrollbar {
            height: 6px;
        }
        .featured-scroll::-webkit-scrollbar-track {
            background: transparent;
        }
        .featured-scroll::-webkit-scrollbar-thumb {
            background: #cbd5e1;
            border-radius: 9999px;
        }
        .featured-card {
            scroll-snap-align: start;
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: all .3s ease;
        }
        .featured-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all .25s ease;
        }
        .faq-item.open {
            border-color: rgba(79, 70, 229, .3);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.1rem 1.25rem;
            font-weight: 600;
            font-size: .95rem;
            cursor: pointer;
            user-select: none;
            transition: color .2s ease;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .icon {
            width: 2rem;
            height: 2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 9999px;
            background: var(--bg);
            color: var(--text-weak);
            transition: all .3s ease;
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .icon {
            background: rgba(79, 70, 229, .1);
            color: var(--primary);
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            padding: 0 1.25rem;
            color: var(--text-weak);
            font-size: .875rem;
            line-height: 1.7;
            transition: max-height .35s ease, padding .3s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-bottom: 1.1rem;
        }

        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 4rem 0 2rem;
        }
        .site-footer h4 {
            color: #fff;
            font-size: .875rem;
            font-weight: 700;
            margin-bottom: 1rem;
            letter-spacing: .02em;
        }
        .site-footer a {
            display: block;
            color: #94a3b8;
            font-size: .875rem;
            padding: .3rem 0;
            transition: color .2s ease, transform .2s ease;
        }
        .site-footer a:hover {
            color: #fff;
            transform: translateX(3px);
        }
        .site-footer .footer-brand p {
            margin-top: 1rem;
            font-size: .875rem;
            color: #94a3b8;
            max-width: 260px;
            line-height: 1.7;
        }
        .footer-social {
            display: flex;
            gap: .6rem;
            margin-top: 1rem;
        }
        .footer-social a {
            width: 2.25rem;
            height: 2.25rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 9999px;
            background: rgba(255, 255, 255, .06);
            color: #94a3b8;
            transition: all .25s ease;
            padding: 0;
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .site-footer .copyright {
            border-top: 1px solid rgba(255, 255, 255, .06);
            margin-top: 2.5rem;
            padding-top: 1.5rem;
            text-align: center;
            font-size: .8125rem;
            color: #64748b;
        }

        .hero-banner {
            position: relative;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }
        .hero-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(15, 23, 42, .92) 15%, rgba(79, 70, 229, .68) 55%, rgba(14, 165, 233, .3) 100%);
        }

        .cta-banner {
            position: relative;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(79, 70, 229, .92), rgba(14, 165, 233, .8));
        }

        @media (max-width: 640px) {
            .section-padding {
                padding: 3rem 1rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
        }