/* roulang page: index */
:root {
            --color-brand: #2563eb;
            --color-brand-dark: #1d4ed8;
            --color-brand-light: #dbeafe;
            --color-accent: #f59e0b;
            --color-accent-dark: #d97706;
            --color-surface: #f8fafc;
            --color-deep: #0f172a;
            --color-text: #1e293b;
            --color-muted: #64748b;
            --color-border: #e2e8f0;
            --color-white: #ffffff;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow: 0 4px 16px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12), 0 4px 12px rgba(0, 0, 0, 0.06);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15), 0 8px 20px rgba(0, 0, 0, 0.08);
            --transition-fast: 0.15s ease;
            --transition: 0.25s ease;
            --transition-slow: 0.35s ease;
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-white);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-brand);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
            background: none;
        }
        input {
            font-family: inherit;
            outline: none;
        }
        ul, ol {
            list-style: none;
        }
        h1, h2, h3, h4, h5, h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--color-deep);
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--color-white);
            border-bottom: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
        }
        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--color-deep);
            letter-spacing: -0.02em;
            white-space: nowrap;
            flex-shrink: 0;
            transition: color var(--transition-fast);
        }
        .header-logo:hover {
            color: var(--color-brand);
        }
        .header-logo .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-brand) 0%, var(--color-brand-dark) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.2rem;
            font-weight: 900;
            flex-shrink: 0;
        }
        .header-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--color-surface);
            border: 2px solid var(--color-border);
            border-radius: 50px;
            padding: 10px 18px;
            transition: all var(--transition-fast);
            max-width: 340px;
            width: 100%;
        }
        .header-search:focus-within {
            border-color: var(--color-brand);
            box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
            background: var(--color-white);
        }
        .header-search input {
            flex: 1;
            border: none;
            background: transparent;
            font-size: 0.95rem;
            color: var(--color-text);
            min-width: 0;
        }
        .header-search input::placeholder {
            color: var(--color-muted);
        }
        .header-search .search-btn {
            color: var(--color-muted);
            font-size: 1rem;
            padding: 4px;
            transition: color var(--transition-fast);
            flex-shrink: 0;
        }
        .header-search .search-btn:hover {
            color: var(--color-brand);
        }

        /* Header Nav Tabs */
        .header-nav-row {
            border-top: 1px solid var(--color-border);
            background: var(--color-white);
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .header-nav-row::-webkit-scrollbar {
            display: none;
        }
        .header-nav-inner {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 6px 0;
            white-space: nowrap;
        }
        .nav-tab {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 18px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-muted);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .nav-tab:hover {
            color: var(--color-text);
            background: var(--color-surface);
        }
        .nav-tab.active {
            color: var(--color-white);
            background: var(--color-brand);
            box-shadow: var(--shadow-sm);
        }
        .nav-tab.active:hover {
            color: var(--color-white);
            background: var(--color-brand-dark);
        }
        .nav-tab .tab-badge {
            font-size: 0.7rem;
            padding: 2px 8px;
            border-radius: 50px;
            background: var(--color-accent);
            color: #fff;
            font-weight: 700;
        }
        .nav-tab.active .tab-badge {
            background: rgba(255,255,255,0.3);
            color: #fff;
        }

        /* Mobile nav toggle */
        .mobile-menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            font-size: 1.4rem;
            color: var(--color-text);
            flex-shrink: 0;
        }
        @media (max-width: 768px) {
            .mobile-menu-toggle {
                display: flex;
            }
            .header-nav-inner {
                gap: 2px;
            }
            .nav-tab {
                padding: 8px 14px;
                font-size: 0.85rem;
            }
            .header-search {
                max-width: 200px;
                padding: 8px 14px;
            }
            .header-search input {
                font-size: 0.85rem;
            }
        }
        @media (max-width: 520px) {
            .header-top {
                flex-wrap: wrap;
                gap: 10px;
            }
            .header-search {
                order: 3;
                max-width: 100%;
                flex: 1 1 100%;
            }
            .header-logo {
                font-size: 1.15rem;
            }
            .header-logo .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 1rem;
            }
            .nav-tab {
                padding: 7px 11px;
                font-size: 0.8rem;
            }
        }

        /* Hero Section */
        .hero-section {
            position: relative;
            min-height: 580px;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 40%, #1a3a6b 100%);
            overflow: hidden;
            padding: 80px 0;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.35;
            z-index: 1;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 60% 30%, rgba(37, 99, 235, 0.3) 0%, transparent 60%),
                        radial-gradient(ellipse at 30% 70%, rgba(245, 158, 11, 0.2) 0%, transparent 50%);
            z-index: 2;
        }
        .hero-content {
            position: relative;
            z-index: 3;
            max-width: 700px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255,255,255,0.2);
            border-radius: 50px;
            padding: 8px 20px;
            font-size: 0.9rem;
            font-weight: 600;
            color: rgba(255,255,255,0.9);
            margin-bottom: 24px;
            letter-spacing: 0.02em;
        }
        .hero-badge .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #22c55e;
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.6); }
        }
        .hero-title {
            font-size: 3.2rem;
            font-weight: 900;
            color: #ffffff;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, #60a5fa 0%, #93c5fd 50%, #fbbf24 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.8);
            margin-bottom: 36px;
            line-height: 1.7;
            max-width: 560px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 700;
            transition: all var(--transition);
            white-space: nowrap;
            letter-spacing: 0.01em;
            position: relative;
            overflow: hidden;
        }
        .btn-primary {
            background: var(--color-brand);
            color: #fff;
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.4);
        }
        .btn-primary:hover {
            background: var(--color-brand-dark);
            box-shadow: 0 6px 24px rgba(37, 99, 235, 0.55);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255,255,255,0.4);
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.1);
            border-color: rgba(255,255,255,0.7);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-accent {
            background: var(--color-accent);
            color: #fff;
            box-shadow: 0 4px 16px rgba(245, 158, 11, 0.4);
        }
        .btn-accent:hover {
            background: var(--color-accent-dark);
            box-shadow: 0 6px 24px rgba(245, 158, 11, 0.55);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-sm {
            padding: 9px 18px;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 1.1rem;
        }
        @media (max-width: 768px) {
            .hero-section {
                min-height: auto;
                padding: 50px 0;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .btn {
                padding: 11px 22px;
                font-size: 0.9rem;
            }
        }
        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-desc {
                font-size: 0.9rem;
            }
            .hero-actions {
                flex-direction: column;
                gap: 10px;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
        }

        /* Section base */
        .section {
            padding: 80px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--color-brand);
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--color-deep);
            letter-spacing: -0.02em;
            margin-bottom: 14px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-muted);
            max-width: 600px;
            margin: 0 auto;
        }
        @media (max-width: 768px) {
            .section {
                padding: 50px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* Features Grid */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            border-radius: 0 0 6px 6px;
            background: var(--color-brand);
            opacity: 0;
            transition: all var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .feature-card:hover::before {
            opacity: 1;
            width: 80px;
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius);
            background: var(--color-brand-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.5rem;
            color: var(--color-brand);
            transition: all var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: var(--color-brand);
            color: #fff;
            transform: scale(1.08);
        }
        .feature-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-deep);
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--color-muted);
            line-height: 1.6;
        }
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .feature-card {
                padding: 24px 18px;
            }
        }

        /* Category Entry */
        .category-entry-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            background: var(--color-surface);
            border-radius: var(--radius-xl);
            overflow: hidden;
            padding: 0;
        }
        .category-entry-image {
            height: 100%;
            min-height: 360px;
            background-size: cover;
            background-position: center;
            border-radius: var(--radius-xl) 0 0 var(--radius-xl);
        }
        .category-entry-body {
            padding: 48px 40px;
        }
        .category-entry-body .tag {
            display: inline-block;
            padding: 6px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 700;
            background: var(--color-brand-light);
            color: var(--color-brand);
            margin-bottom: 16px;
        }
        .category-entry-body h2 {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 14px;
        }
        .category-entry-body p {
            color: var(--color-muted);
            margin-bottom: 24px;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .category-entry-block {
                grid-template-columns: 1fr;
                gap: 0;
            }
            .category-entry-image {
                min-height: 220px;
                border-radius: var(--radius-xl) var(--radius-xl) 0 0;
            }
            .category-entry-body {
                padding: 28px 20px;
            }
            .category-entry-body h2 {
                font-size: 1.4rem;
            }
        }

        /* CMS List */
        .cms-list-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .cms-card {
            background: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
        }
        .cms-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .cms-card-thumb {
            height: 200px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .cms-card-thumb .cms-category-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 5px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 700;
            background: rgba(0,0,0,0.6);
            color: #fff;
            backdrop-filter: blur(4px);
        }
        .cms-card-body {
            padding: 20px;
        }
        .cms-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .cms-card-body h3 a {
            color: var(--color-deep);
            transition: color var(--transition-fast);
        }
        .cms-card-body h3 a:hover {
            color: var(--color-brand);
        }
        .cms-card-body .cms-excerpt {
            font-size: 0.88rem;
            color: var(--color-muted);
            line-height: 1.6;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .cms-card-body .cms-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--color-muted);
        }
        .cms-empty {
            text-align: center;
            padding: 60px 20px;
            color: var(--color-muted);
            font-size: 1.05rem;
            grid-column: 1 / -1;
        }
        @media (max-width: 1024px) {
            .cms-list-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .cms-list-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .cms-card-thumb {
                height: 180px;
            }
        }

        /* Stats */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            text-align: center;
            padding: 32px 20px;
            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);
            border-color: transparent;
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 900;
            color: var(--color-brand);
            letter-spacing: -0.03em;
        }
        .stat-label {
            font-size: 0.95rem;
            color: var(--color-muted);
            margin-top: 6px;
            font-weight: 500;
        }
        @media (max-width: 768px) {
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-number {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 520px) {
            .stat-card {
                padding: 20px 14px;
            }
            .stat-number {
                font-size: 1.8rem;
            }
        }

        /* Advantages */
        .advantages-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: start;
        }
        .advantage-item {
            display: flex;
            gap: 18px;
            align-items: flex-start;
        }
        .advantage-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius);
            background: var(--color-brand-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--color-brand);
            flex-shrink: 0;
            transition: all var(--transition);
        }
        .advantage-item:hover .advantage-icon {
            background: var(--color-brand);
            color: #fff;
            transform: rotate(-5deg) scale(1.05);
        }
        .advantage-text h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .advantage-text p {
            font-size: 0.9rem;
            color: var(--color-muted);
            line-height: 1.6;
        }
        .advantage-image-block {
            border-radius: var(--radius-xl);
            overflow: hidden;
            height: 100%;
            min-height: 360px;
            background-size: cover;
            background-position: center;
        }
        @media (max-width: 768px) {
            .advantages-list {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .advantage-image-block {
                min-height: 240px;
                order: -1;
            }
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid var(--color-border);
            border-radius: var(--radius);
            margin-bottom: 14px;
            overflow: hidden;
            background: var(--color-white);
            transition: all var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-deep);
            text-align: left;
            gap: 14px;
        }
        .faq-question i {
            font-size: 0.9rem;
            color: var(--color-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--color-brand);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: all var(--transition-slow);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
        }
        .faq-answer-inner {
            padding: 0 22px 20px;
            font-size: 0.95rem;
            color: var(--color-muted);
            line-height: 1.7;
        }

        /* CTA Section */
        .cta-section {
            position: relative;
            background: var(--color-deep);
            border-radius: var(--radius-xl);
            overflow: hidden;
            margin: 0 24px;
            padding: 70px 48px;
            text-align: center;
        }
        .cta-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.2;
            z-index: 1;
        }
        .cta-content {
            position: relative;
            z-index: 2;
        }
        .cta-content h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }
        .cta-content p {
            color: rgba(255,255,255,0.75);
            font-size: 1.05rem;
            margin-bottom: 30px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        @media (max-width: 768px) {
            .cta-section {
                margin: 0 16px;
                padding: 44px 20px;
            }
            .cta-content h2 {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 520px) {
            .cta-section {
                margin: 0 10px;
                border-radius: var(--radius-lg);
                padding: 36px 16px;
            }
        }
        .section-cta-wrapper {
            padding: 40px 0 80px;
        }
        @media (max-width: 768px) {
            .section-cta-wrapper {
                padding: 20px 0 50px;
            }
        }

        /* Footer */
        .site-footer {
            background: var(--color-deep);
            color: rgba(255,255,255,0.7);
            padding: 50px 0 30px;
            font-size: 0.9rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .footer-logo {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: -0.02em;
        }
        .footer-brand p {
            color: rgba(255,255,255,0.55);
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: rgba(255,255,255,0.6);
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.12);
            padding-top: 20px;
            text-align: center;
            color: rgba(255,255,255,0.4);
            font-size: 0.85rem;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
        }

        /* Utility */
        .text-brand { color: var(--color-brand); }
        .bg-surface { background: var(--color-surface); }
        .bg-deep { background: var(--color-deep); }
        .rounded-xl { border-radius: var(--radius-xl); }
        .rounded-lg { border-radius: var(--radius-lg); }

/* roulang page: category1 */
:root {
            --primary: #1a56db;
            --primary-dark: #1e40af;
            --primary-light: #dbeafe;
            --primary-bg: #eff6ff;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --accent-light: #fef3c7;
            --text: #1e293b;
            --text-secondary: #64748b;
            --text-muted: #94a3b8;
            --bg: #f8fafc;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow: 0 4px 16px rgba(0, 0, 0, 0.07), 0 2px 6px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.1), 0 4px 12px rgba(0, 0, 0, 0.05);
            --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.12), 0 8px 20px rgba(0, 0, 0, 0.06);
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --header-height: 140px;
            --nav-row-height: 52px;
        }

        *,
        *::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;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            overflow-x: hidden;
        }

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

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

        a:hover {
            color: var(--primary);
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            outline: none;
            transition: all var(--transition-fast);
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 4px;
        }

        input {
            font-family: inherit;
            font-size: inherit;
            border: 2px solid var(--border);
            border-radius: var(--radius-full);
            padding: 10px 18px;
            background: var(--bg-white);
            transition: all var(--transition-fast);
            color: var(--text);
        }

        input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(26, 86, 219, 0.08);
        }

        ul {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* Header */
        .site-header {
            background: var(--bg-white);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow-sm);
            border-bottom: 1px solid var(--border-light);
        }

        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
        }

        .header-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.02em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: color var(--transition-fast);
        }

        .header-logo:hover {
            color: var(--primary);
        }

        .header-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .header-search-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            flex: 0 1 380px;
            min-width: 200px;
        }

        .header-search-wrap input {
            flex: 1;
            min-width: 0;
            padding: 10px 18px;
            border-radius: var(--radius-full);
            border: 2px solid var(--border);
            background: var(--bg);
            font-size: 0.95rem;
            transition: all var(--transition-fast);
        }

        .header-search-wrap input:focus {
            border-color: var(--primary);
            background: var(--bg-white);
            box-shadow: 0 0 0 4px rgba(26, 86, 219, 0.06);
        }

        .btn-search {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            flex-shrink: 0;
            transition: all var(--transition-fast);
        }

        .btn-search:hover {
            background: var(--primary-dark);
            transform: scale(1.04);
            box-shadow: var(--shadow);
        }

        .header-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            background: var(--accent);
            color: #fff;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.92rem;
            white-space: nowrap;
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }

        .header-cta-btn:hover {
            background: var(--accent-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow);
            color: #fff;
        }

        /* Nav Row */
        .header-nav-row {
            border-top: 1px solid var(--border-light);
            background: var(--bg-white);
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .header-nav-row::-webkit-scrollbar {
            display: none;
        }

        .header-nav-inner {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 0;
            white-space: nowrap;
            min-width: max-content;
        }

        .nav-tab {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 18px;
            border-radius: var(--radius-full);
            font-size: 0.93rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
            cursor: pointer;
        }

        .nav-tab:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }

        .nav-tab.active {
            color: #fff;
            background: var(--primary);
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(26, 86, 219, 0.25);
        }

        .nav-tab.active:hover {
            color: #fff;
            background: var(--primary-dark);
        }

        .tab-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 2px 7px;
            border-radius: var(--radius-full);
            background: #ef4444;
            color: #fff;
            line-height: 1;
            letter-spacing: 0.03em;
            animation: badgePulse 2s ease-in-out infinite;
        }

        @keyframes badgePulse {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.8;
                transform: scale(1.08);
            }
        }

        .nav-tab.active .tab-badge {
            background: #fca5a5;
            color: #991b1b;
        }

        /* Mobile nav */
        .mobile-menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--bg);
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--text);
            flex-shrink: 0;
        }

        @media (max-width: 768px) {
            .header-search-wrap {
                flex: 0 0 auto;
                min-width: 0;
            }
            .header-search-wrap input {
                display: none;
            }
            .header-cta-btn {
                padding: 8px 14px;
                font-size: 0.82rem;
                gap: 4px;
            }
            .header-logo {
                font-size: 1.1rem;
            }
            .header-logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.9rem;
            }
            .btn-search {
                width: 38px;
                height: 38px;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 520px) {
            .header-top {
                gap: 10px;
            }
            .header-cta-btn span {
                display: none;
            }
            .header-cta-btn {
                padding: 8px 12px;
                border-radius: 50%;
                width: 38px;
                height: 38px;
                justify-content: center;
            }
            .header-logo {
                font-size: 0.95rem;
            }
            .nav-tab {
                padding: 8px 13px;
                font-size: 0.85rem;
            }
        }

        /* Main */
        .main-content {
            flex: 1;
        }

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

        .section-sm {
            padding: 36px 0;
        }

        .section-lg {
            padding: 72px 0;
        }

        @media (max-width: 768px) {
            .section {
                padding: 36px 0;
            }
            .section-lg {
                padding: 48px 0;
            }
            .section-sm {
                padding: 24px 0;
            }
        }

        /* Banner */
        .category-banner {
            position: relative;
            padding: 80px 0;
            background: linear-gradient(160deg, #1e3a5f 0%, #1a3a6e 30%, #1a2d50 60%, #0f1d38 100%);
            overflow: hidden;
            color: #fff;
        }

        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            z-index: 0;
        }

        .category-banner::after {
            content: '';
            position: absolute;
            top: -60%;
            right: -15%;
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(26, 86, 219, 0.35) 0%, transparent 70%);
            z-index: 0;
            pointer-events: none;
        }

        .banner-inner {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            gap: 48px;
        }

        .banner-text {
            flex: 1;
        }

        .banner-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .banner-breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
            transition: color var(--transition-fast);
        }

        .banner-breadcrumb a:hover {
            color: #fff;
        }

        .banner-breadcrumb .sep {
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.7rem;
        }

        .banner-breadcrumb .current {
            color: #fff;
            font-weight: 500;
        }

        .banner-title {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1.2;
            margin-bottom: 16px;
            color: #fff;
        }

        .banner-title .accent-dot {
            color: var(--accent);
        }

        .banner-desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.7;
            max-width: 560px;
            margin-bottom: 24px;
        }

        .banner-stats {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
        }

        .banner-stat-item {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .banner-stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            line-height: 1;
        }

        .banner-stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.65);
        }

        .banner-visual {
            flex: 0 0 320px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .banner-visual-card {
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-lg);
            padding: 28px;
            text-align: center;
            box-shadow: 0 20px 48px rgba(0, 0, 0, 0.3);
        }

        .banner-visual-card .bv-icon {
            font-size: 3rem;
            margin-bottom: 12px;
            display: block;
        }

        .banner-visual-card .bv-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }

        .banner-visual-card .bv-sub {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
        }

        @media (max-width: 1024px) {
            .banner-visual {
                flex: 0 0 240px;
            }
            .banner-title {
                font-size: 2.1rem;
            }
        }

        @media (max-width: 768px) {
            .category-banner {
                padding: 48px 0;
            }
            .banner-inner {
                flex-direction: column;
                gap: 28px;
            }
            .banner-visual {
                flex: 0 0 auto;
                width: 100%;
                max-width: 280px;
            }
            .banner-title {
                font-size: 1.7rem;
            }
            .banner-desc {
                font-size: 0.95rem;
            }
            .banner-stats {
                gap: 20px;
            }
            .banner-stat-num {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 520px) {
            .banner-title {
                font-size: 1.4rem;
            }
            .banner-stats {
                gap: 14px;
            }
            .banner-stat-num {
                font-size: 1.25rem;
            }
            .banner-visual-card {
                padding: 20px;
            }
        }

        /* Section titles */
        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }

        .section-header.left {
            text-align: left;
            margin-bottom: 32px;
        }

        .section-label {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--primary);
            background: var(--primary-light);
            padding: 5px 14px;
            border-radius: var(--radius-full);
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 1.8rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text);
            line-height: 1.3;
            margin-bottom: 10px;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }

        .section-header.left .section-subtitle {
            margin: 0;
        }

        @media (max-width: 768px) {
            .section-title {
                font-size: 1.4rem;
            }
            .section-subtitle {
                font-size: 0.9rem;
            }
        }

        /* Subcategory cards */
        .subcat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        @media (max-width: 1024px) {
            .subcat-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }

        @media (max-width: 520px) {
            .subcat-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
        }

        .subcat-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            cursor: pointer;
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }

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

        .subcat-card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
            background: var(--bg);
        }

        .subcat-card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .subcat-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            line-height: 1.3;
        }

        .subcat-card-body p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.5;
            flex: 1;
        }

        .subcat-card-meta {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .subcat-card-meta .count {
            font-weight: 600;
            color: var(--primary);
        }

        /* Article list */
        .article-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        @media (max-width: 1024px) {
            .article-list {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }

        @media (max-width: 520px) {
            .article-list {
                grid-template-columns: 1fr;
                gap: 14px;
            }
        }

        .article-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }

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

        .article-card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
            background: var(--bg);
        }

        .article-card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .article-card-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: var(--radius-full);
            background: var(--primary-light);
            color: var(--primary);
            align-self: flex-start;
            letter-spacing: 0.03em;
        }

        .article-card-tag.hot {
            background: #fef3c7;
            color: #b45309;
        }

        .article-card-tag.new {
            background: #dcfce7;
            color: #166534;
        }

        .article-card-body h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-card-body p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .article-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.78rem;
            color: var(--text-muted);
            padding-top: 8px;
            border-top: 1px solid var(--border-light);
        }

        .article-card-footer .read-more {
            color: var(--primary);
            font-weight: 600;
            font-size: 0.82rem;
            transition: color var(--transition-fast);
        }

        .article-card-footer .read-more:hover {
            color: var(--primary-dark);
        }

        .article-card-footer .date {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* Featured highlight */
        .featured-block {
            background: var(--bg-white);
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            display: flex;
            gap: 0;
        }

        .featured-block-img {
            flex: 0 0 45%;
            min-height: 280px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .featured-block-body {
            flex: 1;
            padding: 36px 32px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 12px;
        }

        .featured-block-body .feat-tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            background: #fef3c7;
            color: #b45309;
            align-self: flex-start;
            letter-spacing: 0.04em;
        }

        .featured-block-body h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text);
            line-height: 1.35;
            letter-spacing: -0.02em;
        }

        .featured-block-body p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            border: 2px solid var(--primary);
            color: var(--primary);
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            align-self: flex-start;
            background: transparent;
        }

        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow);
        }

        @media (max-width: 768px) {
            .featured-block {
                flex-direction: column;
            }
            .featured-block-img {
                flex: 0 0 auto;
                aspect-ratio: 16 / 9;
                min-height: 0;
            }
            .featured-block-body {
                padding: 24px 20px;
            }
            .featured-block-body h3 {
                font-size: 1.2rem;
            }
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-sm);
        }

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

        .faq-question {
            padding: 18px 22px;
            font-weight: 600;
            font-size: 0.98rem;
            color: var(--text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            user-select: none;
            transition: color var(--transition-fast);
        }

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

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-bg);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            transition: all var(--transition-fast);
        }

        .faq-answer {
            padding: 0 22px 18px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.65;
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        .faq-item.open .faq-question {
            color: var(--primary);
        }

        .faq-item.open .faq-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(45deg);
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: #fff;
            text-align: center;
            border-radius: var(--radius-xl);
            padding: 48px 32px;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -30%;
            left: -10%;
            width: 350px;
            height: 350px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -20%;
            right: -5%;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-section>* {
            position: relative;
            z-index: 1;
        }

        .cta-section h2 {
            font-size: 1.7rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 10px;
        }

        .cta-section p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 500px;
            margin: 0 auto 24px;
            line-height: 1.6;
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            background: #fff;
            color: var(--primary);
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
        }

        .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(0, 0, 0, 0.3);
            color: var(--primary-dark);
            background: #fefefe;
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 36px 20px;
                border-radius: var(--radius-lg);
            }
            .cta-section h2 {
                font-size: 1.35rem;
            }
            .cta-section p {
                font-size: 0.9rem;
            }
        }

        /* Footer */
        .site-footer {
            background: #1e293b;
            color: #cbd5e1;
            padding: 48px 0 24px;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand .footer-logo {
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: -0.02em;
        }

        .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.6;
            color: #94a3b8;
        }

        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: #e2e8f0;
            margin-bottom: 12px;
            letter-spacing: 0.03em;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li a {
            color: #94a3b8;
            font-size: 0.88rem;
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 18px;
            font-size: 0.82rem;
            color: #64748b;
            text-align: center;
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .site-footer {
                padding: 32px 0 20px;
            }
        }

        /* Utility */
        .text-center {
            text-align: center;
        }

        .mt-0 {
            margin-top: 0;
        }

        .bg-light {
            background: var(--bg-white);
        }

        /* Divider */
        .divider {
            border: 0;
            height: 1px;
            background: var(--border-light);
            margin: 0;
        }

/* roulang page: article */
:root {
            --color-primary: #1e1e2f;
            --color-primary-soft: #2a2a3d;
            --color-accent: #d45d14;
            --color-accent-hover: #b84a0e;
            --color-accent-soft: #fef6f0;
            --color-accent-light: #fde8d8;
            --color-bg: #f7f7f9;
            --color-surface: #ffffff;
            --color-text: #1c1c28;
            --color-text-soft: #5a5a6e;
            --color-text-muted: #8e8ea0;
            --color-border: #e4e4ec;
            --color-border-light: #f0f0f5;
            --color-tag-bg: #fef3e9;
            --color-tag-text: #c25518;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --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 32px rgba(0,0,0,0.10);
            --shadow-xl: 0 20px 48px rgba(0,0,0,0.12);
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Consolas', 'Monaco', monospace;
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.4s ease;
            --max-width: 1200px;
            --max-width-article: 760px;
            --header-height-top: 60px;
            --header-height-nav: 48px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 56px;
            --spacing-2xl: 72px;
        }

        *,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;font-size:16px}
        body{font-family:var(--font-sans);line-height:1.6;color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh;display:flex;flex-direction:column}
        img{max-width:100%;height:auto;display:block}
        a{text-decoration:none;color:inherit;transition:color var(--transition-fast)}
        button,input{font-family:inherit;font-size:inherit;border:none;outline:none;background:none}
        ul,ol{list-style:none}
        h1,h2,h3,h4,h5,h6{line-height:1.3;font-weight:700;color:var(--color-text)}
        .container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 var(--spacing-md)}
        .container--narrow{max-width:var(--max-width-article)}

        /* Header */
        .site-header{position:sticky;top:0;z-index:1000;background:var(--color-surface);box-shadow:var(--shadow-sm);transition:box-shadow var(--transition-base)}
        .site-header.scrolled{box-shadow:var(--shadow-md)}
        .header-top{border-bottom:1px solid var(--color-border-light);height:var(--header-height-top);display:flex;align-items:center}
        .header-top .container{display:flex;align-items:center;justify-content:space-between;width:100%}
        .header-logo{font-size:1.3rem;font-weight:800;color:var(--color-primary);letter-spacing:-0.5px;white-space:nowrap;display:flex;align-items:center;gap:8px}
        .header-logo .logo-dot{width:10px;height:10px;border-radius:50%;background:var(--color-accent);display:inline-block;flex-shrink:0}
        .header-actions{display:flex;align-items:center;gap:var(--spacing-sm)}
        .btn-search{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--color-text-soft);cursor:pointer;transition:all var(--transition-fast);font-size:1.1rem}
        .btn-search:hover{background:var(--color-bg);color:var(--color-text)}
        .btn-cta-sm{padding:9px 18px;border-radius:var(--radius-sm);background:var(--color-accent);color:#fff;font-weight:600;font-size:0.875rem;cursor:pointer;transition:all var(--transition-fast);white-space:nowrap;letter-spacing:0.2px}
        .btn-cta-sm:hover{background:var(--color-accent-hover);transform:translateY(-1px);box-shadow:var(--shadow-sm)}

        /* Nav row */
        .header-nav{background:var(--color-surface);border-bottom:1px solid var(--color-border-light);height:var(--header-height-nav);display:flex;align-items:center;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
        .header-nav::-webkit-scrollbar{display:none}
        .header-nav .container{width:100%}
        .header-nav-inner{display:flex;align-items:center;gap:4px;white-space:nowrap;flex-shrink:0}
        .nav-tab{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:var(--radius-sm);font-size:0.9rem;font-weight:500;color:var(--color-text-soft);transition:all var(--transition-fast);position:relative;cursor:pointer}
        .nav-tab:hover{color:var(--color-text);background:var(--color-bg)}
        .nav-tab.active{color:var(--color-accent);background:var(--color-accent-soft);font-weight:600}
        .tab-badge{font-size:0.7rem;padding:2px 7px;border-radius:20px;background:var(--color-accent);color:#fff;font-weight:700;letter-spacing:0.5px;line-height:1.3}

        /* Main */
        .site-main{flex:1;padding-top:var(--spacing-lg);padding-bottom:var(--spacing-2xl)}

        /* Breadcrumb */
        .breadcrumb-wrap{padding:0 0 var(--spacing-md) 0}
        .breadcrumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:0.85rem;color:var(--color-text-muted)}
        .breadcrumb a{color:var(--color-text-soft);transition:color var(--transition-fast)}
        .breadcrumb a:hover{color:var(--color-accent)}
        .breadcrumb .sep{color:var(--color-border);user-select:none}
        .breadcrumb .current{color:var(--color-text);font-weight:500;max-width:300px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

        /* Article Header */
        .article-header{padding:var(--spacing-md) 0 var(--spacing-lg) 0;text-align:center}
        .article-category-tag{display:inline-flex;align-items:center;gap:5px;padding:6px 14px;border-radius:20px;background:var(--color-tag-bg);color:var(--color-tag-text);font-size:0.8rem;font-weight:600;margin-bottom:var(--spacing-sm);transition:all var(--transition-fast);letter-spacing:0.3px}
        .article-category-tag:hover{background:var(--color-accent-light);transform:translateY(-1px)}
        .article-category-tag .tag-dot{width:6px;height:6px;border-radius:50%;background:var(--color-accent);flex-shrink:0}
        .article-title{font-size:2rem;font-weight:800;color:var(--color-primary);line-height:1.25;margin-bottom:var(--spacing-sm);letter-spacing:-0.3px}
        .article-meta{display:flex;align-items:center;justify-content:center;gap:var(--spacing-md);flex-wrap:wrap;font-size:0.875rem;color:var(--color-text-muted)}
        .article-meta-item{display:flex;align-items:center;gap:5px}
        .article-meta-item .meta-icon{font-size:1rem;opacity:0.7}
        .article-meta-divider{width:4px;height:4px;border-radius:50%;background:var(--color-border);flex-shrink:0}

        /* Article Cover */
        .article-cover{margin:var(--spacing-md) 0 var(--spacing-lg) 0;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md);position:relative}
        .article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;display:block;transition:transform var(--transition-slow)}
        .article-cover:hover img{transform:scale(1.02)}

        /* Article Body */
        .article-body{background:var(--color-surface);border-radius:var(--radius-lg);padding:var(--spacing-lg) var(--spacing-lg);box-shadow:var(--shadow-xs);border:1px solid var(--color-border-light);margin-bottom:var(--spacing-lg)}
        .article-body .content-inner{max-width:var(--max-width-article);margin:0 auto;font-size:1.0625rem;line-height:1.85;color:var(--color-text);word-break:break-word}
        .article-body .content-inner h2{font-size:1.5rem;margin:var(--spacing-lg) 0 var(--spacing-sm) 0;color:var(--color-primary);padding-bottom:8px;border-bottom:2px solid var(--color-border-light)}
        .article-body .content-inner h3{font-size:1.25rem;margin:var(--spacing-md) 0 var(--spacing-sm) 0;color:var(--color-primary)}
        .article-body .content-inner p{margin-bottom:var(--spacing-md);text-align:justify}
        .article-body .content-inner ul,.article-body .content-inner ol{margin-bottom:var(--spacing-md);padding-left:var(--spacing-md)}
        .article-body .content-inner ul li{list-style:disc;margin-bottom:6px;padding-left:4px}
        .article-body .content-inner ol li{list-style:decimal;margin-bottom:6px;padding-left:4px}
        .article-body .content-inner blockquote{border-left:4px solid var(--color-accent);padding:var(--spacing-sm) var(--spacing-md);margin:var(--spacing-md) 0;background:var(--color-accent-soft);border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-style:italic;color:var(--color-text-soft)}
        .article-body .content-inner img{border-radius:var(--radius-md);margin:var(--spacing-md) auto;box-shadow:var(--shadow-sm)}
        .article-body .content-inner a{color:var(--color-accent);text-decoration:underline;text-underline-offset:3px}
        .article-body .content-inner a:hover{color:var(--color-accent-hover)}
        .article-body .content-inner code{background:var(--color-bg);padding:2px 7px;border-radius:4px;font-family:var(--font-mono);font-size:0.9em;color:var(--color-accent)}
        .article-body .content-inner pre{background:var(--color-primary);color:#e0e0e0;padding:var(--spacing-md);border-radius:var(--radius-md);overflow-x:auto;margin:var(--spacing-md) 0;font-size:0.9rem;line-height:1.6}
        .article-body .content-inner pre code{background:none;color:inherit;padding:0}

        /* Article Footer */
        .article-footer{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:var(--spacing-sm);padding-top:var(--spacing-md);margin-top:var(--spacing-md);border-top:1px solid var(--color-border-light);max-width:var(--max-width-article);margin-left:auto;margin-right:auto}
        .article-tags{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
        .article-tag{padding:5px 12px;border-radius:20px;background:var(--color-bg);color:var(--color-text-soft);font-size:0.8rem;font-weight:500;transition:all var(--transition-fast)}
        .article-tag:hover{background:var(--color-accent-soft);color:var(--color-accent)}
        .article-share{display:flex;align-items:center;gap:10px;font-size:0.85rem;color:var(--color-text-muted)}
        .share-btn{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--color-bg);color:var(--color-text-soft);cursor:pointer;transition:all var(--transition-fast);font-size:0.95rem}
        .share-btn:hover{background:var(--color-accent);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-sm)}

        /* NotFound State */
        .notfound-block{text-align:center;padding:var(--spacing-2xl) var(--spacing-md);background:var(--color-surface);border-radius:var(--radius-lg);border:1px solid var(--color-border-light);box-shadow:var(--shadow-xs)}
        .notfound-icon{font-size:4rem;margin-bottom:var(--spacing-md);opacity:0.6}
        .notfound-block h2{font-size:1.5rem;color:var(--color-primary);margin-bottom:var(--spacing-sm)}
        .notfound-block p{color:var(--color-text-soft);margin-bottom:var(--spacing-lg)}
        .btn-back{padding:12px 28px;border-radius:var(--radius-sm);background:var(--color-accent);color:#fff;font-weight:600;font-size:0.95rem;cursor:pointer;transition:all var(--transition-fast);display:inline-flex;align-items:center;gap:8px}
        .btn-back:hover{background:var(--color-accent-hover);transform:translateY(-2px);box-shadow:var(--shadow-md)}

        /* Related Section */
        .section-related{padding:var(--spacing-xl) 0}
        .section-related .section-title{font-size:1.4rem;font-weight:700;color:var(--color-primary);margin-bottom:var(--spacing-md);display:flex;align-items:center;gap:10px}
        .section-related .section-title::before{content:'';width:4px;height:24px;border-radius:2px;background:var(--color-accent);flex-shrink:0}
        .related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:var(--spacing-md)}
        .related-card{background:var(--color-surface);border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--color-border-light);transition:all var(--transition-base);cursor:pointer;display:flex;flex-direction:column}
        .related-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:transparent}
        .related-card-thumb{aspect-ratio:16/10;overflow:hidden;position:relative;background:var(--color-bg)}
        .related-card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform var(--transition-slow)}
        .related-card:hover .related-card-thumb img{transform:scale(1.06)}
        .related-card-body{padding:var(--spacing-sm);flex:1;display:flex;flex-direction:column;gap:8px}
        .related-card-cat{font-size:0.75rem;font-weight:600;color:var(--color-accent);text-transform:uppercase;letter-spacing:0.5px}
        .related-card-title{font-size:0.95rem;font-weight:700;color:var(--color-primary);line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color var(--transition-fast)}
        .related-card:hover .related-card-title{color:var(--color-accent)}
        .related-card-meta{font-size:0.78rem;color:var(--color-text-muted);margin-top:auto}
        .related-empty{text-align:center;padding:var(--spacing-xl);color:var(--color-text-muted);font-size:0.95rem;grid-column:1/-1}

        /* CTA Section */
        .section-cta{background:var(--color-primary);border-radius:var(--radius-xl);padding:var(--spacing-xl) var(--spacing-lg);text-align:center;margin:var(--spacing-xl) 0;position:relative;overflow:hidden}
        .section-cta::before{content:'';position:absolute;top:-60px;right:-60px;width:200px;height:200px;border-radius:50%;background:rgba(255,255,255,0.03);pointer-events:none}
        .section-cta::after{content:'';position:absolute;bottom:-40px;left:-40px;width:140px;height:140px;border-radius:50%;background:rgba(255,255,255,0.03);pointer-events:none}
        .section-cta h3{font-size:1.5rem;color:#fff;margin-bottom:var(--spacing-sm);position:relative;z-index:1}
        .section-cta p{color:rgba(255,255,255,0.75);margin-bottom:var(--spacing-lg);position:relative;z-index:1;max-width:500px;margin-left:auto;margin-right:auto}
        .btn-cta-lg{padding:14px 32px;border-radius:var(--radius-sm);background:var(--color-accent);color:#fff;font-weight:700;font-size:1rem;cursor:pointer;transition:all var(--transition-fast);position:relative;z-index:1;display:inline-flex;align-items:center;gap:8px;letter-spacing:0.2px}
        .btn-cta-lg:hover{background:#fff;color:var(--color-primary);transform:translateY(-2px);box-shadow:var(--shadow-xl)}

        /* Back to top */
        .back-to-top{position:fixed;bottom:32px;right:32px;width:44px;height:44px;border-radius:50%;background:var(--color-surface);box-shadow:var(--shadow-md);display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:99;opacity:0;visibility:hidden;transform:translateY(10px);transition:all var(--transition-base);color:var(--color-text-soft);font-size:1.2rem;border:1px solid var(--color-border)}
        .back-to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
        .back-to-top:hover{background:var(--color-accent);color:#fff;border-color:var(--color-accent);transform:translateY(-3px);box-shadow:var(--shadow-lg)}

        /* Footer */
        .site-footer{background:var(--color-primary);color:rgba(255,255,255,0.7);padding:var(--spacing-xl) 0 var(--spacing-md) 0;margin-top:auto}
        .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:var(--spacing-lg);margin-bottom:var(--spacing-lg)}
        .footer-brand .footer-logo{font-size:1.3rem;font-weight:800;color:#fff;margin-bottom:var(--spacing-sm);letter-spacing:-0.3px}
        .footer-brand p{font-size:0.875rem;line-height:1.7;color:rgba(255,255,255,0.55);max-width:280px}
        .footer-col h4{color:#fff;font-size:0.95rem;margin-bottom:var(--spacing-sm);font-weight:600}
        .footer-col ul{display:flex;flex-direction:column;gap:8px}
        .footer-col ul li a{font-size:0.85rem;color:rgba(255,255,255,0.55);transition:color var(--transition-fast)}
        .footer-col ul li a:hover{color:var(--color-accent)}
        .footer-bottom{border-top:1px solid rgba(255,255,255,0.1);padding-top:var(--spacing-md);text-align:center;font-size:0.8rem;color:rgba(255,255,255,0.4)}

        /* Responsive */
        @media (max-width:1024px){
            .footer-grid{grid-template-columns:1fr 1fr;gap:var(--spacing-md)}
            .footer-brand{grid-column:1/-1}
            .footer-brand p{max-width:100%}
            .article-title{font-size:1.6rem}
            .related-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}
        }
        @media (max-width:768px){
            :root{--spacing-lg:28px;--spacing-xl:40px;--spacing-2xl:52px}
            .header-logo{font-size:1.1rem}
            .article-title{font-size:1.35rem}
            .article-body{padding:var(--spacing-md)}
            .article-body .content-inner{font-size:1rem;line-height:1.8}
            .article-meta{gap:var(--spacing-sm);font-size:0.8rem}
            .related-grid{grid-template-columns:1fr 1fr;gap:var(--spacing-sm)}
            .section-cta{padding:var(--spacing-lg) var(--spacing-md);border-radius:var(--radius-lg)}
            .section-cta h3{font-size:1.25rem}
            .footer-grid{grid-template-columns:1fr 1fr;gap:var(--spacing-md)}
            .back-to-top{bottom:20px;right:20px;width:38px;height:38px}
        }
        @media (max-width:520px){
            .container{padding:0 var(--spacing-sm)}
            .article-title{font-size:1.2rem}
            .article-body{padding:var(--spacing-sm);border-radius:var(--radius-md)}
            .article-body .content-inner{font-size:0.95rem;line-height:1.75}
            .article-body .content-inner h2{font-size:1.25rem}
            .article-body .content-inner h3{font-size:1.1rem}
            .article-cover{border-radius:var(--radius-md);margin:var(--spacing-sm) 0 var(--spacing-md) 0}
            .article-footer{flex-direction:column;align-items:flex-start}
            .related-grid{grid-template-columns:1fr;gap:var(--spacing-sm)}
            .btn-cta-sm{font-size:0.8rem;padding:7px 14px}
            .btn-search{width:36px;height:36px}
            .footer-grid{grid-template-columns:1fr;gap:var(--spacing-md)}
            .footer-brand{grid-column:auto}
            .breadcrumb{font-size:0.78rem}
            .section-cta{border-radius:var(--radius-md)}
            .nav-tab{padding:6px 13px;font-size:0.82rem}
        }