/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #0b6e4f;
            --primary-dark: #084c37;
            --primary-light: #e8f5f0;
            --accent: #f5b041;
            --accent-dark: #d4942a;
            --bg-body: #f8fafc;
            --bg-white: #ffffff;
            --bg-dark: #0a1a14;
            --bg-card: #ffffff;
            --text-dark: #0d1b15;
            --text-body: #2c3e38;
            --text-muted: #6b7f78;
            --text-white: #f0faf5;
            --border-light: #e2ebe6;
            --border-medium: #c5d4cd;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(11, 110, 79, 0.06);
            --shadow-md: 0 6px 24px rgba(11, 110, 79, 0.10);
            --shadow-lg: 0 16px 48px rgba(11, 110, 79, 0.14);
            --shadow-xl: 0 24px 64px rgba(11, 110, 79, 0.18);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --nav-height: 72px;
        }

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

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

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

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

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

        button,
        .button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
            transition: all var(--transition);
        }
        button:focus-visible,
        .button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

        input,
        textarea,
        select {
            font-family: inherit;
            font-size: 1rem;
            border: 1px solid var(--border-medium);
            border-radius: var(--radius-sm);
            padding: 0.6rem 1rem;
            transition: border-color var(--transition), box-shadow var(--transition);
            background: var(--bg-white);
            color: var(--text-dark);
        }
        input:focus,
        textarea:focus,
        select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(11, 110, 79, 0.15);
        }

        ::selection {
            background: var(--primary);
            color: var(--text-white);
        }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        .container-narrow {
            max-width: 900px;
        }

        .container-wide {
            max-width: 1400px;
        }

        /* ===== Typography ===== */
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-dark);
            letter-spacing: -0.01em;
        }

        h1 {
            font-size: clamp(2rem, 5vw, 3.2rem);
            margin-bottom: 1rem;
        }
        h2 {
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
            margin-bottom: 0.75rem;
        }
        h3 {
            font-size: clamp(1.2rem, 2.5vw, 1.6rem);
            margin-bottom: 0.5rem;
        }
        h4 {
            font-size: 1.15rem;
            margin-bottom: 0.4rem;
        }

        p {
            margin-bottom: 1rem;
        }
        p:last-child {
            margin-bottom: 0;
        }

        .text-muted {
            color: var(--text-muted);
        }
        .text-center {
            text-align: center;
        }
        .text-white {
            color: var(--text-white);
        }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--primary);
            background: var(--primary-light);
            padding: 0.3rem 1rem;
            border-radius: 100px;
            margin-bottom: 0.75rem;
        }

        .section-title {
            margin-bottom: 0.5rem;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto 2rem;
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid var(--border-light);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-sm);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
            gap: 1rem;
        }

        .site-logo {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: -0.02em;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .site-logo:hover {
            color: var(--primary);
        }
        .site-logo .logo-icon {
            display: inline-block;
            width: 32px;
            height: 32px;
            background: var(--primary);
            border-radius: var(--radius-sm);
            color: white;
            text-align: center;
            line-height: 32px;
            font-size: 1rem;
            margin-right: 0.4rem;
        }

        /* Search (nav center) */
        .nav-search {
            flex: 1;
            max-width: 480px;
            margin: 0 1rem;
            position: relative;
        }
        .nav-search .search-wrap {
            display: flex;
            align-items: center;
            background: var(--bg-body);
            border: 1px solid var(--border-light);
            border-radius: 100px;
            padding: 0.3rem 0.3rem 0.3rem 1.2rem;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .nav-search .search-wrap:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(11, 110, 79, 0.12);
        }
        .nav-search .search-wrap i {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-right: 0.5rem;
        }
        .nav-search .search-wrap input {
            flex: 1;
            border: none;
            background: transparent;
            padding: 0.4rem 0;
            font-size: 0.9rem;
            color: var(--text-dark);
            min-width: 0;
        }
        .nav-search .search-wrap input::placeholder {
            color: var(--text-muted);
        }
        .nav-search .search-wrap input:focus {
            box-shadow: none;
        }
        .nav-search .search-wrap button {
            background: var(--primary);
            color: white;
            border-radius: 100px;
            padding: 0.45rem 1.2rem;
            font-size: 0.85rem;
            font-weight: 600;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-search .search-wrap button:hover {
            background: var(--primary-dark);
        }

        /* Nav links */
        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            flex-shrink: 0;
        }
        .nav-links a {
            display: block;
            padding: 0.5rem 1rem;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-body);
            border-radius: var(--radius-sm);
            transition: background var(--transition), color var(--transition);
            white-space: nowrap;
        }
        .nav-links a:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
        }
        .nav-links a.active {
            background: var(--primary);
            color: white;
        }
        .nav-links a.active:hover {
            background: var(--primary-dark);
        }

        /* Mobile toggle */
        .nav-toggle {
            display: none;
            font-size: 1.4rem;
            color: var(--text-dark);
            padding: 0.4rem;
            border-radius: var(--radius-sm);
            background: transparent;
            border: none;
            cursor: pointer;
            flex-shrink: 0;
        }
        .nav-toggle:hover {
            background: var(--primary-light);
        }

        /* ===== Hero ===== */
        .hero {
            padding: calc(var(--nav-height) + 2.5rem) 0 4rem;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center 20%;
            background-blend-mode: overlay;
            position: relative;
            min-height: 70vh;
            display: flex;
            align-items: center;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 26, 20, 0.88) 0%, rgba(10, 26, 20, 0.60) 60%, rgba(10, 26, 20, 0.40) 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-content {
            max-width: 780px;
        }
        .hero-content h1 {
            color: var(--text-white);
            font-size: clamp(2.2rem, 5.5vw, 3.6rem);
            margin-bottom: 1rem;
            line-height: 1.15;
        }
        .hero-content h1 .highlight {
            color: var(--accent);
        }
        .hero-content p {
            color: rgba(240, 250, 245, 0.85);
            font-size: 1.15rem;
            max-width: 600px;
            margin-bottom: 2rem;
            line-height: 1.7;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            align-items: center;
        }
        .hero-actions .btn-primary {
            background: var(--accent);
            color: var(--bg-dark);
            padding: 0.8rem 2.2rem;
            border-radius: 100px;
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition);
        }
        .hero-actions .btn-primary:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 176, 65, 0.35);
        }
        .hero-actions .btn-ghost {
            color: var(--text-white);
            padding: 0.8rem 2rem;
            border-radius: 100px;
            font-weight: 600;
            font-size: 1rem;
            border: 1px solid rgba(255, 255, 255, 0.3);
            transition: all var(--transition);
        }
        .hero-actions .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(255, 255, 255, 0.6);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
        }
        .hero-stats .stat-item {
            text-align: left;
        }
        .hero-stats .stat-number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }
        .hero-stats .stat-label {
            font-size: 0.85rem;
            color: rgba(240, 250, 245, 0.65);
        }

        /* ===== Section Spacing ===== */
        .section {
            padding: 4.5rem 0;
        }
        .section-sm {
            padding: 2.5rem 0;
        }
        .section-lg {
            padding: 6rem 0;
        }

        .section-bg-light {
            background: var(--primary-light);
        }
        .section-bg-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-bg-dark h2,
        .section-bg-dark h3,
        .section-bg-dark .section-title {
            color: var(--text-white);
        }
        .section-bg-dark .text-muted {
            color: rgba(240, 250, 245, 0.65);
        }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 1.5rem;
            transition: all var(--transition);
            border: 1px solid var(--border-light);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--border-medium);
        }

        .card .card-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 1rem;
            flex-shrink: 0;
        }
        .card h3 {
            font-size: 1.15rem;
            margin-bottom: 0.5rem;
        }
        .card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            flex: 1;
        }
        .card .card-link {
            margin-top: 1rem;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .card .card-link i {
            transition: transform var(--transition);
        }
        .card .card-link:hover i {
            transform: translateX(4px);
        }

        .card-cover img {
            border-radius: var(--radius-sm) var(--radius-sm) 0 0;
            width: 100%;
            height: 200px;
            object-fit: cover;
            margin: -1.5rem -1.5rem 1rem -1.5rem;
            width: calc(100% + 3rem);
        }

        /* ===== Grid helpers ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.2rem 0.75rem;
            border-radius: 100px;
            background: var(--primary-light);
            color: var(--primary);
            letter-spacing: 0.02em;
        }
        .badge-accent {
            background: #fef3e0;
            color: #b8751a;
        }
        .badge-dark {
            background: rgba(255, 255, 255, 0.12);
            color: var(--text-white);
        }

        /* ===== Content List (CMS) ===== */
        .content-list .list-item {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            padding: 1rem 0;
            border-bottom: 1px solid var(--border-light);
            transition: background var(--transition);
        }
        .content-list .list-item:last-child {
            border-bottom: none;
        }
        .content-list .list-item:hover {
            padding-left: 0.5rem;
        }
        .content-list .item-thumb {
            width: 80px;
            height: 80px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--primary-light);
        }
        .content-list .item-info {
            flex: 1;
            min-width: 0;
        }
        .content-list .item-info h4 {
            font-size: 1rem;
            margin-bottom: 0.25rem;
            font-weight: 600;
        }
        .content-list .item-info h4 a {
            color: var(--text-dark);
        }
        .content-list .item-info h4 a:hover {
            color: var(--primary);
        }
        .content-list .item-info p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 0.25rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .content-list .item-meta {
            font-size: 0.78rem;
            color: var(--text-muted);
            display: flex;
            gap: 0.75rem;
            flex-wrap: wrap;
        }
        .content-list .item-meta .badge {
            font-size: 0.7rem;
        }

        /* ===== Steps / Process ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 2rem;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            position: relative;
            counter-increment: step;
        }
        .step-item::before {
            content: counter(step);
            display: block;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: white;
            font-size: 1.2rem;
            font-weight: 800;
            line-height: 48px;
            margin: 0 auto 1rem;
            box-shadow: 0 4px 16px rgba(11, 110, 79, 0.25);
        }
        .step-item h4 {
            font-size: 1.05rem;
            margin-bottom: 0.3rem;
        }
        .step-item p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .step-item:not(:last-child)::after {
            content: '→';
            position: absolute;
            right: -1.2rem;
            top: 1rem;
            font-size: 1.6rem;
            color: var(--border-medium);
            font-weight: 300;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 1rem 0;
        }
        .faq-item:first-child {
            border-top: 1px solid var(--border-light);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            padding: 0.5rem 0;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-dark);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 1rem;
        }
        .faq-question i {
            font-size: 1.1rem;
            color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 1.5rem 0 0;
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .faq-answer.open {
            max-height: 300px;
            padding-top: 0.5rem;
            padding-bottom: 0.5rem;
        }

        /* ===== CTA ===== */
        .cta-box {
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            border-radius: var(--radius-lg);
            padding: 3.5rem 3rem;
            text-align: center;
            color: var(--text-white);
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(10, 26, 20, 0.78);
            z-index: 1;
        }
        .cta-box>* {
            position: relative;
            z-index: 2;
        }
        .cta-box h2 {
            color: var(--text-white);
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            margin-bottom: 0.75rem;
        }
        .cta-box p {
            color: rgba(240, 250, 245, 0.8);
            max-width: 560px;
            margin: 0 auto 1.5rem;
            font-size: 1rem;
        }
        .cta-box .btn-cta {
            background: var(--accent);
            color: var(--bg-dark);
            padding: 0.9rem 2.8rem;
            border-radius: 100px;
            font-weight: 700;
            font-size: 1.05rem;
            display: inline-block;
            transition: all var(--transition);
        }
        .cta-box .btn-cta:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(245, 176, 65, 0.30);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(240, 250, 245, 0.7);
            padding: 3rem 0 1.5rem;
            font-size: 0.9rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .site-logo {
            color: var(--text-white);
            margin-bottom: 0.75rem;
            display: inline-block;
        }
        .footer-brand p {
            font-size: 0.85rem;
            max-width: 320px;
            color: rgba(240, 250, 245, 0.6);
        }
        .footer-col h5 {
            color: var(--text-white);
            font-size: 0.95rem;
            margin-bottom: 0.75rem;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            color: rgba(240, 250, 245, 0.6);
            padding: 0.25rem 0;
            font-size: 0.85rem;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
        }

        .footer-bottom {
            text-align: center;
            padding-top: 1.5rem;
            font-size: 0.8rem;
            color: rgba(240, 250, 245, 0.4);
        }
        .footer-bottom a {
            color: rgba(240, 250, 245, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== Mobile Navigation ===== */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-md);
            padding: 1rem 1.5rem;
            z-index: 999;
            max-height: 70vh;
            overflow-y: auto;
            flex-direction: column;
            gap: 0.25rem;
        }
        .mobile-nav.open {
            display: flex;
        }
        .mobile-nav a {
            padding: 0.7rem 1rem;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
            transition: background var(--transition);
        }
        .mobile-nav a:hover {
            background: var(--primary-light);
        }
        .mobile-nav a.active {
            background: var(--primary);
            color: white;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem;
            }
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps .step-item:not(:last-child)::after {
                display: none;
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-height: 64px;
            }
            .nav-links {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .nav-search {
                max-width: 200px;
                margin: 0 0.5rem;
            }
            .nav-search .search-wrap button span {
                display: none;
            }
            .nav-search .search-wrap button {
                padding: 0.45rem 0.8rem;
            }
            .nav-search .search-wrap button::after {
                content: '\f002';
                font-family: 'Font Awesome 6 Free';
                font-weight: 900;
            }

            .hero {
                min-height: auto;
                padding: calc(var(--nav-height) + 1.5rem) 0 3rem;
            }
            .hero-content h1 {
                font-size: clamp(1.6rem, 6vw, 2.4rem);
            }
            .hero-content p {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 1.2rem;
            }
            .hero-stats .stat-number {
                font-size: 1.4rem;
            }

            .section {
                padding: 3rem 0;
            }
            .section-lg {
                padding: 4rem 0;
            }

            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 1rem;
            }

            .content-list .list-item {
                flex-direction: column;
            }
            .content-list .item-thumb {
                width: 100%;
                height: 160px;
            }

            .cta-box {
                padding: 2.5rem 1.5rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-brand p {
                max-width: 100%;
            }

            .steps {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .step-item {
                display: flex;
                gap: 1rem;
                text-align: left;
                align-items: flex-start;
            }
            .step-item::before {
                margin: 0;
                flex-shrink: 0;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                padding: 0 0.75rem;
                gap: 0.4rem;
            }
            .site-logo {
                font-size: 1rem;
            }
            .site-logo .logo-icon {
                width: 26px;
                height: 26px;
                line-height: 26px;
                font-size: 0.8rem;
            }
            .nav-search {
                max-width: 140px;
            }
            .nav-search .search-wrap {
                padding: 0.2rem 0.2rem 0.2rem 0.8rem;
            }
            .nav-search .search-wrap input {
                font-size: 0.8rem;
            }
            .nav-search .search-wrap button {
                padding: 0.35rem 0.6rem;
                font-size: 0.75rem;
            }

            .hero-content h1 {
                font-size: 1.5rem;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-ghost {
                padding: 0.6rem 1.4rem;
                font-size: 0.85rem;
            }

            .container {
                padding: 0 1rem;
            }
            .cta-box {
                padding: 2rem 1rem;
            }
            .cta-box .btn-cta {
                padding: 0.7rem 2rem;
                font-size: 0.9rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --primary-bg: #eff6ff;
            --accent: #06b6d4;
            --accent-dark: #0891b2;
            --bg-body: #ffffff;
            --bg-section: #f8fafc;
            --bg-card: #ffffff;
            --text: #0f172a;
            --text-secondary: #475569;
            --text-weak: #94a3b8;
            --border: #e2e8f0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.10);
            --transition: all 0.25s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --nav-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            color: var(--text);
            background: var(--bg-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover,
        a:focus {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

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

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

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

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

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            height: var(--nav-height);
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 20px;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text);
            white-space: nowrap;
            flex-shrink: 0;
        }
        .site-logo .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.2rem;
        }
        .site-logo:hover {
            color: var(--text);
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            gap: 16px;
            flex: 1;
            justify-content: flex-end;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
        }
        .nav-links a {
            display: inline-block;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-secondary);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-links a:hover,
        .nav-links a:focus {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .nav-links a.active {
            color: var(--primary);
            background: var(--primary-bg);
            font-weight: 600;
        }

        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-section);
            border: 1px solid var(--border);
            border-radius: 40px;
            padding: 0 16px;
            height: 42px;
            min-width: 200px;
            transition: var(--transition);
        }
        .nav-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
        }
        .nav-search .search-icon {
            color: var(--text-weak);
            font-size: 0.95rem;
            margin-right: 10px;
        }
        .nav-search input {
            border: none;
            background: transparent;
            outline: none;
            width: 100%;
            font-size: 0.9rem;
            color: var(--text);
            padding: 8px 0;
        }
        .nav-search input::placeholder {
            color: var(--text-weak);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text);
            cursor: pointer;
            padding: 4px 8px;
        }

        @media (max-width: 900px) {
            .nav-links {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                box-shadow: var(--shadow);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links a {
                width: 100%;
                padding: 12px 16px;
            }
            .nav-toggle {
                display: block;
            }
            .nav-search {
                min-width: 120px;
                flex: 1;
                max-width: 260px;
            }
            .nav-wrap {
                gap: 8px;
            }
        }

        @media (max-width: 520px) {
            .site-logo {
                font-size: 1.1rem;
            }
            .site-logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 1rem;
            }
            .nav-search {
                min-width: 80px;
                padding: 0 12px;
                height: 38px;
            }
            .nav-search input {
                font-size: 0.8rem;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 60%, #0f172a 100%);
            overflow: hidden;
            min-height: 480px;
            display: flex;
            align-items: center;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.18;
            mix-blend-mode: overlay;
        }
        .hero-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
            color: #fff;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(37, 99, 235, 0.25);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            padding: 6px 20px;
            border-radius: 40px;
            font-size: 0.85rem;
            letter-spacing: 0.3px;
            color: #93c5fd;
            margin-bottom: 24px;
        }
        .hero-section h1 {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #ffffff, #93c5fd);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-section .subtitle {
            font-size: 1.2rem;
            color: #cbd5e1;
            max-width: 720px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(37, 99, 235, 0.30);
            color: #fff;
        }
        .btn-outline-light {
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.35);
            color: #fff;
        }
        .btn-outline-light:hover,
        .btn-outline-light:focus {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(255, 255, 255, 0.6);
            transform: translateY(-2px);
            color: #fff;
        }

        @media (max-width: 768px) {
            .hero-section {
                padding: 60px 0 50px;
                min-height: 380px;
            }
            .hero-section h1 {
                font-size: 2.2rem;
            }
            .hero-section .subtitle {
                font-size: 1rem;
            }
            .btn {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
        }
        @media (max-width: 520px) {
            .hero-section h1 {
                font-size: 1.8rem;
            }
            .hero-section .subtitle {
                font-size: 0.9rem;
            }
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-section);
        }
        .section-title {
            text-align: center;
            margin-bottom: 16px;
        }
        .section-title h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }
        .section-title p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0 auto;
            line-height: 1.8;
        }
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-title h2 {
                font-size: 1.7rem;
            }
            .section-title p {
                font-size: 0.95rem;
            }
        }

        /* ===== 卖点卡片网格 ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 40px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 40px;
        }
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 520px) {
            .grid-3 {
                grid-template-columns: 1fr;
            }
            .grid-4 {
                grid-template-columns: 1fr;
            }
        }

        .card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 24px;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }
        .card .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--primary-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--primary);
            margin-bottom: 18px;
        }
        .card h3 {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .card .badge {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            padding: 2px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 48px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 20px;
            text-align: center;
            position: relative;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-card .step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-weight: 700;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
        }
        .step-card h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .step-card p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
        }
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 平台标签 ===== */
        .platform-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin-top: 32px;
        }
        .platform-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 40px;
            padding: 10px 22px;
            font-weight: 500;
            font-size: 0.9rem;
            color: var(--text-secondary);
            transition: var(--transition);
            box-shadow: var(--shadow);
        }
        .platform-tag i {
            color: var(--primary);
            font-size: 1.1rem;
        }
        .platform-tag:hover {
            border-color: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 40px auto 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item summary {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            list-style: none;
            transition: var(--transition);
        }
        .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: 0.8rem;
            color: var(--text-weak);
            transition: var(--transition);
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item summary:hover {
            background: var(--bg-section);
        }
        .faq-item .faq-body {
            padding: 0 24px 18px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0f172a, #1e293b);
            padding: 72px 0;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.08;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: #cbd5e1;
            max-width: 580px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .cta-section .btn {
            font-size: 1.05rem;
            padding: 16px 40px;
        }
        @media (max-width: 768px) {
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 56px 0 0;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .site-footer .footer-brand .site-logo {
            color: #f1f5f9;
            font-size: 1.3rem;
            margin-bottom: 12px;
            display: inline-flex;
        }
        .site-footer .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.8;
            max-width: 360px;
            margin-top: 8px;
        }
        .site-footer .footer-col h5 {
            color: #e2e8f0;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .site-footer .footer-col a {
            display: block;
            color: #94a3b8;
            font-size: 0.9rem;
            padding: 4px 0;
            transition: var(--transition);
        }
        .site-footer .footer-col a:hover {
            color: #f1f5f9;
            padding-left: 4px;
        }
        .site-footer .footer-bottom {
            padding: 24px 0;
            text-align: center;
            font-size: 0.85rem;
            color: #64748b;
        }
        @media (max-width: 900px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 520px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        /* ===== 分隔装饰 ===== */
        .divider {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 4px;
            margin: 0 auto 20px;
        }

        /* ===== 数据统计条 ===== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            max-width: 800px;
            margin: 32px auto 0;
            text-align: center;
        }
        .stat-item .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-item .stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 4px;
        }
        @media (max-width: 520px) {
            .stats-row {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .stat-item .stat-number {
                font-size: 1.8rem;
            }
        }

        /* ===== 图文区块 ===== */
        .content-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            margin-top: 40px;
        }
        .content-row .text-col h3 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .content-row .text-col p {
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .content-row .img-col img {
            border-radius: var(--radius);
            box-shadow: var(--shadow-hover);
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        @media (max-width: 768px) {
            .content-row {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .content-row .text-col h3 {
                font-size: 1.3rem;
            }
        }

        /* ===== 列表 ===== */
        .check-list {
            list-style: none;
            padding: 0;
            margin-top: 12px;
        }
        .check-list li {
            padding: 6px 0;
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: var(--text-secondary);
            font-size: 0.95rem;
        }
        .check-list li i {
            color: var(--primary);
            margin-top: 4px;
            flex-shrink: 0;
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 1024px) {
            :root {
                --max-width: 100%;
            }
            .container {
                padding: 0 20px;
            }
        }
        @media (max-width: 768px) {
            .section-title h2 {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 520px) {
            .hero-section h1 {
                font-size: 1.6rem;
            }
            .container {
                padding: 0 12px;
            }
        }

/* roulang page: article */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --primary-bg: #eff6ff;
            --secondary: #0f172a;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --surface: #ffffff;
            --bg: #f8fafc;
            --text: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 16px;
            --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
            --shadow-hover: 0 12px 40px rgba(15, 23, 42, 0.14);
            --shadow-lg: 0 20px 60px rgba(15, 23, 42, 0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container-max: 1200px;
            --header-h: 72px;
        }

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

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

        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }

        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
        p { margin-bottom: 1.2rem; color: var(--text-secondary); }
        .container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; width: 100%; }

        /* --- Header / Nav --- */
        .site-header {
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            height: var(--header-h);
            display: flex;
            align-items: center;
            box-shadow: 0 1px 4px rgba(0,0,0,0.03);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text);
            white-space: nowrap;
        }
        .site-logo .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
        }
        .site-logo:hover { color: var(--text); opacity: 0.9; }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: nowrap;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-links a:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .nav-links a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
        }

        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 0 16px;
            height: 42px;
            flex: 0 1 280px;
            transition: var(--transition);
        }
        .nav-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
        }
        .nav-search i {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-right: 10px;
        }
        .nav-search input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.9rem;
            color: var(--text);
            width: 100%;
            font-family: var(--font);
        }
        .nav-search input::placeholder { color: var(--text-muted); }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
        }
        .nav-toggle:hover { background: var(--bg); }

        @media (max-width: 820px) {
            .nav-search { flex: 0 1 180px; }
            .nav-links a { padding: 6px 14px; font-size: 0.85rem; }
            .site-logo { font-size: 1.1rem; }
            .site-logo .logo-icon { width: 32px; height: 32px; font-size: 0.95rem; }
        }

        @media (max-width: 640px) {
            .nav-links { display: none; }
            .nav-links.open { display: flex; flex-direction: column; position: absolute; top: var(--header-h); left: 0; right: 0; background: var(--surface); border-bottom: 1px solid var(--border); padding: 16px 24px; gap: 6px; box-shadow: var(--shadow); }
            .nav-links.open a { width: 100%; text-align: center; }
            .nav-toggle { display: block; }
            .nav-search { flex: 1; max-width: 200px; }
        }

        /* --- Hero Banner --- */
        .article-hero {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
            overflow: hidden;
            min-height: 340px;
            display: flex;
            align-items: center;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.18;
            pointer-events: none;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.85) 0%, rgba(30,41,59,0.70) 100%);
            pointer-events: none;
        }
        .article-hero .container { position: relative; z-index: 2; }
        .article-hero .breadcrumb {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.6);
            margin-bottom: 16px;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .article-hero .breadcrumb a { color: rgba(255,255,255,0.7); }
        .article-hero .breadcrumb a:hover { color: #fff; }
        .article-hero .breadcrumb span { color: rgba(255,255,255,0.5); }
        .article-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            max-width: 900px;
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -0.02em;
        }
        .article-hero .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
            color: rgba(255,255,255,0.75);
            font-size: 0.95rem;
        }
        .article-hero .meta i { margin-right: 6px; }
        .article-hero .meta .tag {
            display: inline-block;
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(4px);
            padding: 4px 16px;
            border-radius: 999px;
            font-size: 0.8rem;
            font-weight: 600;
            color: #fff;
            border: 1px solid rgba(255,255,255,0.15);
        }

        @media (max-width: 768px) {
            .article-hero { padding: 50px 0 40px; min-height: 240px; }
            .article-hero h1 { font-size: 1.8rem; }
            .article-hero .meta { gap: 12px; font-size: 0.85rem; }
        }
        @media (max-width: 520px) {
            .article-hero h1 { font-size: 1.4rem; }
            .article-hero .meta { flex-direction: column; align-items: flex-start; gap: 8px; }
        }

        /* --- Article Content --- */
        .article-section {
            padding: 60px 0;
        }
        .article-body {
            max-width: 820px;
            margin: 0 auto;
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 48px 56px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }
        .article-body .content-illustration {
            margin: 0 0 32px 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: 0 4px 16px rgba(0,0,0,0.06);
        }
        .article-body .content-illustration img {
            width: 100%;
            height: auto;
            display: block;
        }
        .article-body .entry-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-secondary);
        }
        .article-body .entry-content p {
            margin-bottom: 1.4rem;
        }
        .article-body .entry-content h2,
        .article-body .entry-content h3,
        .article-body .entry-content h4 {
            margin-top: 2rem;
            margin-bottom: 1rem;
            color: var(--text);
        }
        .article-body .entry-content ul,
        .article-body .entry-content ol {
            margin-bottom: 1.4rem;
            padding-left: 1.5rem;
            list-style: disc;
        }
        .article-body .entry-content li {
            margin-bottom: 0.4rem;
            color: var(--text-secondary);
        }
        .article-body .entry-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body .entry-content blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            background: var(--primary-bg);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 1.5rem 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body .entry-content code {
            background: var(--bg);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            border: 1px solid var(--border);
        }
        .article-body .entry-content pre {
            background: #0f172a;
            color: #e2e8f0;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            font-size: 0.9rem;
            margin: 1.5rem 0;
        }
        .article-body .entry-content img {
            border-radius: var(--radius-sm);
            margin: 1.5rem auto;
            box-shadow: 0 2px 12px rgba(0,0,0,0.06);
        }

        .article-body .not-found {
            text-align: center;
            padding: 60px 20px;
        }
        .article-body .not-found i {
            font-size: 3rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            display: block;
        }
        .article-body .not-found h3 {
            font-size: 1.4rem;
            margin-bottom: 12px;
            color: var(--text);
        }
        .article-body .not-found p {
            color: var(--text-secondary);
            margin-bottom: 20px;
        }
        .article-body .not-found .button {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        @media (max-width: 768px) {
            .article-body { padding: 28px 24px; }
            .article-body .entry-content { font-size: 0.98rem; }
        }
        @media (max-width: 520px) {
            .article-body { padding: 20px 16px; border-radius: var(--radius); }
            .article-body .entry-content { font-size: 0.92rem; }
        }

        /* --- Core Advantages --- */
        .advantages-section {
            padding: 60px 0;
            background: var(--surface);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .advantages-section .section-title {
            text-align: center;
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .advantages-section .section-sub {
            text-align: center;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 44px;
            font-size: 1.05rem;
        }
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .advantage-card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 32px 28px;
            text-align: center;
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .advantage-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .advantage-card .icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, var(--primary-bg), #dbeafe);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.6rem;
            color: var(--primary);
        }
        .advantage-card h4 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .advantage-card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        @media (max-width: 768px) {
            .advantages-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
            .advantages-section .section-title { font-size: 1.6rem; }
        }
        @media (max-width: 520px) {
            .advantages-grid { grid-template-columns: 1fr; gap: 16px; }
            .advantage-card { padding: 24px 20px; }
        }

        /* --- Related Cards --- */
        .related-section {
            padding: 60px 0;
            background: var(--bg);
        }
        .related-section .section-title {
            text-align: center;
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 40px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .related-card {
            background: var(--surface);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .related-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--primary-light);
        }
        .related-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        .related-card .card-body {
            padding: 20px 24px 24px;
        }
        .related-card .card-body .tag {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            color: var(--primary);
            background: var(--primary-bg);
            padding: 2px 12px;
            border-radius: 999px;
            margin-bottom: 8px;
        }
        .related-card .card-body h5 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .related-card .card-body h5 a { color: var(--text); }
        .related-card .card-body h5 a:hover { color: var(--primary); }
        .related-card .card-body p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        @media (max-width: 768px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
            .related-section .section-title { font-size: 1.5rem; }
        }
        @media (max-width: 520px) {
            .related-grid { grid-template-columns: 1fr; gap: 16px; }
            .related-card .card-img { height: 160px; }
        }

        /* --- FAQ --- */
        .faq-section {
            padding: 60px 0;
            background: var(--surface);
            border-top: 1px solid var(--border);
        }
        .faq-section .section-title {
            text-align: center;
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .faq-section .section-sub {
            text-align: center;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 40px;
            font-size: 1.02rem;
        }
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border); }
        .faq-item summary {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text);
            list-style: none;
        }
        .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: 0.8rem;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item .faq-answer p { margin-bottom: 0; }

        @media (max-width: 768px) {
            .faq-section .section-title { font-size: 1.5rem; }
            .faq-item summary { padding: 14px 18px; font-size: 0.92rem; }
            .faq-item .faq-answer { padding: 0 18px 16px; font-size: 0.88rem; }
        }

        /* --- CTA --- */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            position: relative;
            overflow: hidden;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.75);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .button-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .cta-section .button {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            font-family: var(--font);
        }
        .cta-section .button-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
        }
        .cta-section .button-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 12px 32px rgba(37, 99, 235, 0.45);
            transform: translateY(-2px);
            color: #fff;
        }
        .cta-section .button-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255,255,255,0.25);
        }
        .cta-section .button-outline:hover {
            border-color: #fff;
            background: rgba(255,255,255,0.08);
            transform: translateY(-2px);
            color: #fff;
        }

        @media (max-width: 768px) {
            .cta-section { padding: 50px 0; }
            .cta-section h2 { font-size: 1.7rem; }
            .cta-section p { font-size: 0.95rem; }
            .cta-section .button { padding: 12px 28px; font-size: 0.9rem; }
        }
        @media (max-width: 520px) {
            .cta-section .button-group { flex-direction: column; align-items: center; }
            .cta-section .button { width: 100%; max-width: 280px; justify-content: center; }
        }

        /* --- Footer --- */
        .site-footer {
            background: #0f172a;
            color: rgba(255,255,255,0.75);
            padding: 56px 0 0;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .site-footer .site-logo {
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 16px;
            display: inline-flex;
        }
        .site-footer .site-logo .logo-icon {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
        }
        .site-footer .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.55);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .site-footer .footer-col h5 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 18px;
        }
        .site-footer .footer-col a {
            display: block;
            color: rgba(255,255,255,0.55);
            font-size: 0.88rem;
            padding: 4px 0;
            transition: var(--transition);
        }
        .site-footer .footer-col a:hover { color: #fff; padding-left: 4px; }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 20px 0;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }

        @media (max-width: 900px) {
            .site-footer .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .site-footer .footer-brand { grid-column: span 2; }
        }
        @media (max-width: 520px) {
            .site-footer .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .site-footer .footer-brand { grid-column: span 1; }
            .site-footer { padding: 36px 0 0; }
        }

        /* --- Buttons (通用) --- */
        .button { font-family: var(--font); }
        .button.primary {
            background: var(--primary);
            color: #fff;
            border-radius: 999px;
            padding: 12px 28px;
            font-weight: 600;
            border: none;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .button.primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3);
            transform: translateY(-2px);
            color: #fff;
        }

        /* --- Utility --- */
        .text-center { text-align: center; }
        .mt-1 { margin-top: 8px; }
        .mt-2 { margin-top: 16px; }
        .mt-3 { margin-top: 24px; }
        .mb-1 { margin-bottom: 8px; }
        .mb-2 { margin-bottom: 16px; }
        .mb-3 { margin-bottom: 24px; }