/* roulang page: index */
/* ===== CSS Design System ===== */
        :root {
            --primary: #1a56db;
            --primary-dark: #1340a0;
            --primary-light: #e8effd;
            --primary-alpha: rgba(26, 86, 219, 0.08);
            --secondary: #f59e0b;
            --secondary-light: #fef3c7;
            --accent: #10b981;
            --accent-light: #d1fae5;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --bg-dark-alt: #1e293b;
            --text: #0f172a;
            --text-light: #475569;
            --text-lighter: #94a3b8;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --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);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --shadow-xl: 0 24px 60px rgba(0,0,0,0.16);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --container: 1200px;
            --header-h: 72px;
            --tab-h: 64px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-tap-highlight-color: transparent; }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-bottom: var(--tab-h);
        }
        @media (min-width: 769px) { body { padding-bottom: 0; } }

        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }

        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
        button { cursor: pointer; background: none; }
        button:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: var(--radius-xs); }

        /* ===== Container ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) { .container { padding: 0 16px; } }

        /* ===== Typography ===== */
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text);
            margin-bottom: 12px;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 640px;
            margin: 0 auto 48px;
            text-align: center;
            line-height: 1.6;
        }
        @media (max-width: 768px) {
            .section-title { font-size: 1.6rem; }
            .section-subtitle { font-size: 1rem; margin-bottom: 32px; }
        }

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

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            transition: box-shadow var(--transition);
        }
        .header.scrolled { box-shadow: var(--shadow); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .header-logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
        }
        .header-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: var(--radius-xs);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .header-logo:hover { color: var(--text); }
        .header-logo span { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

        .nav-desktop { display: flex; align-items: center; gap: 4px; }
        .nav-desktop a {
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav-desktop a:hover { color: var(--primary); background: var(--primary-alpha); }
        .nav-desktop a.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
        .nav-desktop .nav-cta {
            background: var(--primary);
            color: #fff !important;
            padding: 8px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            margin-left: 12px;
        }
        .nav-desktop .nav-cta:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-sm); }

        .hamburger { display: none; flex-direction: column; gap: 5px; padding: 8px; cursor: pointer; }
        .hamburger span { display: block; width: 24px; height: 2.5px; background: var(--text); border-radius: 2px; transition: all var(--transition); }
        .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

        /* Mobile drawer */
        .mobile-drawer {
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            padding: 16px 24px 32px;
            border-bottom: 1px solid var(--border);
            transform: translateY(-110%);
            opacity: 0;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            z-index: 999;
            pointer-events: none;
            box-shadow: var(--shadow-lg);
        }
        .mobile-drawer.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
        .mobile-drawer a {
            display: block;
            padding: 14px 16px;
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text-light);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }
        .mobile-drawer a:hover { background: var(--primary-alpha); color: var(--primary); }
        .mobile-drawer a.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
        .mobile-drawer .drawer-cta {
            margin-top: 12px;
            background: var(--primary);
            color: #fff !important;
            text-align: center;
            font-weight: 600;
        }
        .mobile-drawer .drawer-cta:hover { background: var(--primary-dark); }

        @media (max-width: 768px) {
            .nav-desktop { display: none; }
            .hamburger { display: flex; }
        }

        /* ===== Mobile Bottom Tab ===== */
        .bottom-tab {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 1100;
            height: var(--tab-h);
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-top: 1px solid var(--border);
            display: none;
            align-items: center;
            justify-content: space-around;
            padding: 0 8px;
            box-shadow: 0 -2px 12px rgba(0,0,0,0.06);
        }
        .bottom-tab a {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2px;
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            font-size: 0.7rem;
            font-weight: 500;
            color: var(--text-lighter);
            transition: all var(--transition);
            min-width: 64px;
        }
        .bottom-tab a i { font-size: 1.2rem; transition: all var(--transition); }
        .bottom-tab a:hover { color: var(--primary); }
        .bottom-tab a.active { color: var(--primary); }
        .bottom-tab a.active i { transform: scale(1.1); }
        .bottom-tab .tab-label { font-size: 0.65rem; letter-spacing: 0.3px; }
        @media (max-width: 768px) { .bottom-tab { display: flex; } }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 88vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: calc(var(--header-h) + 40px) 24px 60px;
            overflow: hidden;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.3;
            mix-blend-mode: overlay;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(26,86,219,0.15) 0%, transparent 60%),
                        radial-gradient(ellipse at 70% 50%, rgba(245,158,11,0.08) 0%, transparent 60%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
            text-align: center;
            color: #fff;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 20px;
            border-radius: 50px;
            background: rgba(255,255,255,0.1);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255,255,255,0.15);
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-white);
            margin-bottom: 24px;
            letter-spacing: 1px;
        }
        .hero-badge i { margin-right: 6px; color: var(--secondary); }
        .hero-title {
            font-size: 3.6rem;
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
            background: linear-gradient(to right, #ffffff, #cbd5e1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, #60a5fa, #3b82f6);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.75);
            max-width: 600px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .hero-actions .btn-primary {
            padding: 16px 40px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-size: 1.05rem;
            font-weight: 600;
            transition: all var(--transition);
            box-shadow: 0 8px 24px rgba(26,86,219,0.35);
        }
        .hero-actions .btn-primary:hover { background: var(--primary-dark); transform: translateY(-3px); box-shadow: 0 12px 36px rgba(26,86,219,0.45); }
        .hero-actions .btn-outline {
            padding: 16px 40px;
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255,255,255,0.3);
            border-radius: 50px;
            font-size: 1.05rem;
            font-weight: 600;
            transition: all var(--transition);
        }
        .hero-actions .btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.08); transform: translateY(-3px); }

        .hero-stats {
            display: flex;
            gap: 40px;
            justify-content: center;
            margin-top: 48px;
            padding-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        .hero-stats .stat-item { text-align: center; }
        .hero-stats .stat-num { font-size: 2rem; font-weight: 700; color: #fff; }
        .hero-stats .stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.55); margin-top: 2px; }

        @media (max-width: 768px) {
            .hero { min-height: 70vh; padding: calc(var(--header-h) + 24px) 16px 40px; }
            .hero-title { font-size: 2.2rem; }
            .hero-desc { font-size: 1rem; }
            .hero-actions .btn-primary, .hero-actions .btn-outline { padding: 14px 28px; font-size: 0.95rem; }
            .hero-stats { gap: 20px; flex-wrap: wrap; }
            .hero-stats .stat-num { font-size: 1.5rem; }
        }
        @media (max-width: 480px) {
            .hero-title { font-size: 1.8rem; }
            .hero-stats { gap: 16px; }
            .hero-stats .stat-item { flex: 1; min-width: 80px; }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(26,86,219,0.3);
        }
        .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(26,86,219,0.4); color: #fff; }
        .btn-secondary {
            background: var(--secondary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(245,158,11,0.3);
        }
        .btn-secondary:hover { background: #d97706; transform: translateY(-2px); color: #fff; }
        .btn-outline-primary {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline-primary:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
        .btn-white {
            background: #fff;
            color: var(--text);
            box-shadow: var(--shadow);
        }
        .btn-white:hover { background: var(--bg-alt); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
        .btn-sm { padding: 8px 18px; font-size: 0.85rem; }

        /* ===== Section Spacing ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-alt); }
        .section-dark { background: var(--bg-dark); color: #fff; }
        @media (max-width: 768px) { .section { padding: 48px 0; } }

        /* ===== About Section ===== */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .about-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            aspect-ratio: 4/3;
            background: var(--bg-alt);
        }
        .about-image img { width: 100%; height: 100%; object-fit: cover; }
        .about-content h3 { font-size: 1.8rem; font-weight: 700; margin-bottom: 16px; }
        .about-content p { color: var(--text-light); margin-bottom: 16px; font-size: 1.05rem; line-height: 1.8; }
        .about-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
        .about-tags .tag {
            padding: 6px 16px;
            border-radius: 50px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.85rem;
            font-weight: 500;
        }
        @media (max-width: 768px) {
            .about-grid { grid-template-columns: 1fr; gap: 32px; }
            .about-content h3 { font-size: 1.4rem; }
        }

        /* ===== Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 20px;
        }
        .feature-icon.blue { background: var(--primary-light); color: var(--primary); }
        .feature-icon.amber { background: var(--secondary-light); color: var(--secondary); }
        .feature-icon.green { background: var(--accent-light); color: var(--accent); }
        .feature-icon.purple { background: #ede9fe; color: #7c3aed; }
        .feature-card h4 { font-size: 1.15rem; font-weight: 600; margin-bottom: 10px; }
        .feature-card p { color: var(--text-light); font-size: 0.95rem; line-height: 1.7; }
        @media (max-width: 992px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 640px) { .features-grid { grid-template-columns: 1fr; } }

        /* ===== Categories / Services ===== */
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            aspect-ratio: 3/4;
            cursor: pointer;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-xl); }
        .category-card img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
        .category-card:hover img { transform: scale(1.08); }
        .category-card .card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15,23,42,0.85) 0%, rgba(15,23,42,0.1) 60%, transparent 100%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 24px 20px;
            transition: all var(--transition);
        }
        .category-card .card-overlay h4 { color: #fff; font-size: 1.15rem; font-weight: 600; margin-bottom: 6px; }
        .category-card .card-overlay p { color: rgba(255,255,255,0.7); font-size: 0.85rem; }
        .category-card .card-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            padding: 4px 14px;
            border-radius: 50px;
            background: rgba(255,255,255,0.2);
            backdrop-filter: blur(4px);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 500;
        }
        @media (max-width: 992px) { .categories-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 520px) { .categories-grid { grid-template-columns: 1fr 1fr; gap: 12px; } }

        /* ===== News / CMS List ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .news-card .news-img {
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--bg-alt);
        }
        .news-card .news-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
        .news-card:hover .news-img img { transform: scale(1.05); }
        .news-card .news-body { padding: 20px 22px 24px; }
        .news-card .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-lighter);
            margin-bottom: 10px;
        }
        .news-card .news-meta .cat {
            padding: 2px 12px;
            border-radius: 50px;
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 500;
            font-size: 0.75rem;
        }
        .news-card .news-title {
            font-size: 1.05rem;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .news-title a { color: var(--text); }
        .news-card .news-title a:hover { color: var(--primary); }
        .news-card .news-excerpt {
            font-size: 0.9rem;
            color: var(--text-light);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            color: var(--text-lighter);
            font-size: 1.05rem;
        }
        .news-empty i { font-size: 2.4rem; margin-bottom: 16px; display: block; color: var(--border); }
        @media (max-width: 992px) { .news-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 640px) { .news-grid { grid-template-columns: 1fr; } }

        /* ===== Steps / Flow ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .steps-grid::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(to right, var(--border), var(--border));
            z-index: 0;
        }
        .step-item {
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 1.3rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            border: 3px solid #fff;
            box-shadow: 0 0 0 3px var(--primary);
        }
        .step-item h4 { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; }
        .step-item p { font-size: 0.9rem; color: var(--text-light); }
        @media (max-width: 768px) {
            .steps-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 16px; }
            .steps-grid::before { display: none; }
        }
        @media (max-width: 480px) { .steps-grid { grid-template-columns: 1fr 1fr; } }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; 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: all var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-item.open { border-color: var(--primary); box-shadow: 0 0 0 2px var(--primary-light); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            cursor: pointer;
            transition: all var(--transition);
            gap: 16px;
        }
        .faq-question:hover { background: var(--primary-alpha); }
        .faq-question i { font-size: 0.85rem; color: var(--text-lighter); transition: transform var(--transition); }
        .faq-item.open .faq-question i { transform: rotate(180deg); color: var(--primary); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 20px; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, #3b82f6 100%);
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(255,255,255,0.1) 0%, transparent 60%),
                        radial-gradient(ellipse at 70% 50%, rgba(255,255,255,0.05) 0%, transparent 60%);
        }
        .cta-section * { position: relative; z-index: 1; }
        .cta-section h2 { font-size: 2rem; font-weight: 700; color: #fff; margin-bottom: 12px; }
        .cta-section p { color: rgba(255,255,255,0.85); font-size: 1.1rem; margin-bottom: 28px; max-width: 500px; margin-left: auto; margin-right: auto; }
        .cta-section .btn-white { font-size: 1.05rem; padding: 16px 40px; }
        .cta-section .btn-white:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(0,0,0,0.2); }
        @media (max-width: 768px) {
            .cta-section { padding: 40px 24px; border-radius: var(--radius); }
            .cta-section h2 { font-size: 1.5rem; }
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 48px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .footer-logo { font-size: 1.25rem; font-weight: 700; color: #fff; margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
        .footer-brand .footer-logo .logo-icon { width: 32px; height: 32px; background: linear-gradient(135deg, var(--primary), #3b82f6); border-radius: var(--radius-xs); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 1rem; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
        .footer-col h5 { color: #fff; font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; }
        .footer-col a { display: block; color: rgba(255,255,255,0.6); font-size: 0.9rem; padding: 4px 0; transition: all var(--transition); }
        .footer-col a:hover { color: #fff; padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: #fff; }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px 24px; }
            .footer-brand { grid-column: 1 / -1; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 480px) {
            .footer-grid { grid-template-columns: 1fr; }
        }

        /* ===== Scroll Top ===== */
        .scroll-top {
            position: fixed;
            bottom: calc(var(--tab-h) + 20px);
            right: 24px;
            z-index: 900;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-lg);
            transition: all var(--transition);
            opacity: 0;
            transform: translateY(20px);
            pointer-events: none;
        }
        .scroll-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
        .scroll-top:hover { background: var(--primary-dark); transform: translateY(-4px); }
        @media (min-width: 769px) { .scroll-top { bottom: 32px; } }

        /* ===== Helper ===== */
        .gap-8 { gap: 8px; }
        .gap-16 { gap: 16px; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .mb-16 { margin-bottom: 16px; }
        .mb-24 { margin-bottom: 24px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .flex-wrap { flex-wrap: wrap; }

        /* ===== Animations ===== */
        @keyframes fadeUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
        .animate-fade-up { animation: fadeUp 0.6s ease forwards; }
        .animate-delay-1 { animation-delay: 0.1s; }
        .animate-delay-2 { animation-delay: 0.2s; }
        .animate-delay-3 { animation-delay: 0.3s; }
        .animate-delay-4 { animation-delay: 0.4s; }

/* roulang page: article */
/* ===== 设计变量 ===== */
:root {
    --primary: #e63946;
    --primary-dark: #c1121f;
    --primary-light: #ff6b6b;
    --secondary: #1d3557;
    --secondary-light: #457b9d;
    --accent: #f4a261;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --text-dark: #1a1a2e;
    --text-body: #2d2d44;
    --text-weak: #6c757d;
    --text-white: #ffffff;
    --border: #e0e0e8;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 6px 24px rgba(0,0,0,0.08);
    --shadow-lg: 0 16px 48px rgba(0,0,0,0.10);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    --max-width: 1200px;
    --header-height: 72px;
}

/* ===== Reset / Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-body);
    background: var(--bg-light);
    padding-top: var(--header-height);
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
button { cursor: pointer; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--text-dark); }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* ===== Header ===== */
.header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(255,255,255,0.96);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    height: var(--header-height);
    transition: var(--transition);
}
.header.scrolled { box-shadow: var(--shadow-md); }
.header-inner {
    max-width: var(--max-width); margin: 0 auto; padding: 0 20px;
    height: 100%; display: flex; align-items: center; justify-content: space-between;
}
.header-logo {
    display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 800;
    color: var(--text-dark); letter-spacing: -0.5px;
}
.header-logo .logo-icon {
    display: flex; align-items: center; justify-content: center;
    width: 40px; height: 40px; background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff; border-radius: var(--radius-sm); font-size: 18px; box-shadow: 0 4px 12px rgba(230,57,70,0.3);
}
.header-logo:hover { color: var(--text-dark); }
.nav-desktop { display: flex; align-items: center; gap: 6px; }
.nav-desktop a {
    padding: 8px 18px; border-radius: var(--radius-sm); font-size: 15px; font-weight: 500;
    color: var(--text-body); transition: var(--transition); position: relative;
}
.nav-desktop a:hover { color: var(--primary); background: rgba(230,57,70,0.06); }
.nav-desktop a.active { color: var(--primary); background: rgba(230,57,70,0.10); font-weight: 600; }
.nav-desktop a.nav-cta {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff !important; padding: 8px 22px; border-radius: var(--radius-sm);
    box-shadow: 0 4px 14px rgba(230,57,70,0.25); font-weight: 600;
}
.nav-desktop a.nav-cta:hover {
    transform: translateY(-2px); box-shadow: 0 8px 24px rgba(230,57,70,0.35);
}
.hamburger {
    display: none; flex-direction: column; gap: 5px; cursor: pointer;
    padding: 6px; border-radius: var(--radius-sm); background: transparent;
}
.hamburger span {
    display: block; width: 26px; height: 3px; background: var(--text-dark);
    border-radius: 4px; transition: var(--transition);
}

/* ===== Mobile Bottom Nav ===== */
.mobile-bottom-nav {
    display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 999;
    background: rgba(255,255,255,0.98); backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--border); padding: 6px 0 env(safe-area-inset-bottom, 6px);
    box-shadow: 0 -4px 20px rgba(0,0,0,0.06);
}
.mobile-bottom-nav .mb-nav-inner {
    display: flex; justify-content: space-around; align-items: center;
}
.mobile-bottom-nav .mb-item {
    display: flex; flex-direction: column; align-items: center; gap: 2px;
    padding: 6px 12px; border-radius: var(--radius-sm); font-size: 11px; font-weight: 500;
    color: var(--text-weak); transition: var(--transition);
}
.mobile-bottom-nav .mb-item i { font-size: 20px; transition: var(--transition); }
.mobile-bottom-nav .mb-item:hover,
.mobile-bottom-nav .mb-item.active { color: var(--primary); }
.mobile-bottom-nav .mb-item.active i { transform: scale(1.1); }
.mobile-bottom-nav .mb-item .mb-badge {
    position: absolute; top: -2px; right: -8px; background: var(--primary);
    color: #fff; font-size: 10px; padding: 1px 6px; border-radius: 20px; font-weight: 600;
}

/* ===== Mobile Drawer ===== */
.mobile-drawer {
    position: fixed; top: var(--header-height); left: 0; right: 0; bottom: 0;
    background: rgba(255,255,255,0.98); backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 998; transform: translateX(-100%); transition: var(--transition);
    padding: 20px; display: flex; flex-direction: column; gap: 8px; overflow-y: auto;
}
.mobile-drawer.open { transform: translateX(0); }
.mobile-drawer a {
    display: flex; align-items: center; gap: 12px; padding: 14px 18px;
    border-radius: var(--radius-sm); font-size: 17px; font-weight: 500; color: var(--text-body);
    transition: var(--transition);
}
.mobile-drawer a:hover { background: rgba(230,57,70,0.06); color: var(--primary); }
.mobile-drawer a.active { background: rgba(230,57,70,0.10); color: var(--primary); font-weight: 600; }
.mobile-drawer a i { width: 24px; text-align: center; font-size: 18px; }

/* ===== Article Hero ===== */
.article-hero {
    position: relative; padding: 60px 0 40px; background: var(--bg-white);
    border-bottom: 1px solid var(--border);
}
.article-hero-bg {
    position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
    opacity: 0.06; pointer-events: none;
}
.article-hero .container { position: relative; z-index: 2; }
.article-breadcrumb {
    display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 20px;
    font-size: 14px; color: var(--text-weak);
}
.article-breadcrumb a { color: var(--text-weak); }
.article-breadcrumb a:hover { color: var(--primary); }
.article-breadcrumb span { color: var(--text-weak); }
.article-category-badge {
    display: inline-block; padding: 4px 16px; border-radius: 20px;
    background: rgba(230,57,70,0.10); color: var(--primary); font-size: 13px; font-weight: 600;
    margin-bottom: 16px;
}
.article-hero h1 {
    font-size: 36px; font-weight: 800; color: var(--text-dark);
    line-height: 1.3; max-width: 900px; margin-bottom: 16px;
}
.article-meta {
    display: flex; align-items: center; gap: 24px; flex-wrap: wrap;
    font-size: 14px; color: var(--text-weak); padding-top: 8px;
}
.article-meta span { display: flex; align-items: center; gap: 6px; }
.article-meta i { font-size: 15px; }

/* ===== Article Content ===== */
.article-main {
    padding: 50px 0 70px; background: var(--bg-light);
}
.article-layout {
    display: grid; grid-template-columns: 1fr 320px; gap: 48px; align-items: start;
}
.article-body {
    background: var(--bg-white); border-radius: var(--radius-md);
    padding: 40px 44px; box-shadow: var(--shadow-sm);
}
.article-body .content {
    font-size: 16.5px; line-height: 1.9; color: var(--text-body);
}
.article-body .content p { margin-bottom: 1.4em; }
.article-body .content h2 {
    font-size: 24px; margin-top: 1.8em; margin-bottom: 0.6em; padding-bottom: 8px;
    border-bottom: 2px solid var(--border);
}
.article-body .content h3 { font-size: 20px; margin-top: 1.4em; margin-bottom: 0.5em; }
.article-body .content ul, .article-body .content ol {
    margin: 1em 0; padding-left: 24px;
}
.article-body .content li { margin-bottom: 0.4em; list-style: disc; }
.article-body .content blockquote {
    border-left: 4px solid var(--primary); background: rgba(230,57,70,0.04);
    padding: 16px 20px; margin: 1.2em 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-body);
}
.article-body .content a { color: var(--primary); font-weight: 500; text-decoration: underline; }
.article-body .content img {
    border-radius: var(--radius-sm); margin: 1.5em auto; box-shadow: var(--shadow-sm);
}
.article-body .content .article-img-wrapper {
    text-align: center; margin: 1.5em 0;
}
.article-body .content .article-img-wrapper figcaption {
    font-size: 14px; color: var(--text-weak); margin-top: 8px;
}
.article-tags {
    display: flex; flex-wrap: wrap; gap: 10px; margin-top: 36px; padding-top: 24px;
    border-top: 1px solid var(--border);
}
.article-tags .tag {
    display: inline-block; padding: 4px 14px; border-radius: 20px;
    background: var(--bg-light); color: var(--text-body); font-size: 13px; font-weight: 500;
    transition: var(--transition);
}
.article-tags .tag:hover { background: var(--primary); color: #fff; }
.article-share {
    display: flex; align-items: center; gap: 12px; margin-top: 24px; padding-top: 20px;
    border-top: 1px solid var(--border);
}
.article-share span { font-size: 14px; color: var(--text-weak); font-weight: 500; }
.article-share .share-btn {
    display: flex; align-items: center; justify-content: center;
    width: 40px; height: 40px; border-radius: 50%; background: var(--bg-light);
    color: var(--text-body); font-size: 18px; transition: var(--transition);
}
.article-share .share-btn:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

/* ===== Sidebar ===== */
.article-sidebar { display: flex; flex-direction: column; gap: 28px; }
.sidebar-card {
    background: var(--bg-white); border-radius: var(--radius-md);
    padding: 24px 26px; box-shadow: var(--shadow-sm);
}
.sidebar-card h4 {
    font-size: 16px; font-weight: 700; margin-bottom: 16px; display: flex; align-items: center; gap: 8px;
}
.sidebar-card h4 i { color: var(--primary); }
.sidebar-list { display: flex; flex-direction: column; gap: 12px; }
.sidebar-list a {
    display: flex; gap: 14px; align-items: flex-start; padding: 10px 0;
    border-bottom: 1px solid var(--border); transition: var(--transition);
}
.sidebar-list a:last-child { border-bottom: none; }
.sidebar-list a:hover { padding-left: 6px; }
.sidebar-list .sb-img {
    width: 70px; height: 52px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0;
    background: var(--bg-light);
}
.sidebar-list .sb-text { flex: 1; }
.sidebar-list .sb-text h5 { font-size: 14px; font-weight: 600; color: var(--text-dark); line-height: 1.4; margin-bottom: 4px; }
.sidebar-list .sb-text span { font-size: 12px; color: var(--text-weak); }
.sidebar-cta {
    display: flex; flex-direction: column; gap: 10px; text-align: center;
}
.sidebar-cta .btn-block {
    padding: 12px; border-radius: var(--radius-sm); font-weight: 600; font-size: 15px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff; transition: var(--transition);
}
.sidebar-cta .btn-block:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(230,57,70,0.3); }
.sidebar-cta .btn-block-outline {
    padding: 12px; border-radius: var(--radius-sm); font-weight: 600; font-size: 15px;
    background: transparent; border: 2px solid var(--primary); color: var(--primary);
    transition: var(--transition);
}
.sidebar-cta .btn-block-outline:hover { background: var(--primary); color: #fff; }

/* ===== News Section (bottom) ===== */
.news-section {
    padding: 50px 0 60px; background: var(--bg-white);
}
.news-section .section-header {
    display: flex; justify-content: space-between; align-items: center; margin-bottom: 32px;
}
.news-section .section-header h2 { font-size: 26px; }
.news-section .section-header a { font-size: 15px; font-weight: 500; }
.news-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.news-card {
    background: var(--bg-light); border-radius: var(--radius-md); overflow: hidden;
    transition: var(--transition); border: 1px solid var(--border);
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.news-card img { width: 100%; height: 170px; object-fit: cover; }
.news-card-body { padding: 16px 18px 20px; }
.news-card-body .news-cat {
    display: inline-block; padding: 2px 10px; border-radius: 12px;
    background: rgba(230,57,70,0.10); color: var(--primary); font-size: 12px; font-weight: 600;
    margin-bottom: 8px;
}
.news-card-body h4 { font-size: 15px; font-weight: 600; margin-bottom: 6px; line-height: 1.4; }
.news-card-body h4 a { color: var(--text-dark); }
.news-card-body h4 a:hover { color: var(--primary); }
.news-card-body p { font-size: 13px; color: var(--text-weak); margin-bottom: 10px; }
.news-card-body .news-date { font-size: 12px; color: var(--text-weak); }

/* ===== FAQ ===== */
.faq-section {
    padding: 60px 0; background: var(--bg-light);
}
.faq-section h2 { text-align: center; font-size: 28px; margin-bottom: 40px; }
.faq-grid {
    max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px;
}
.faq-item {
    background: var(--bg-white); border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm); overflow: hidden; border: 1px solid var(--border);
    transition: var(--transition);
}
.faq-item.active { box-shadow: var(--shadow-md); }
.faq-question {
    display: flex; justify-content: space-between; align-items: center;
    padding: 18px 22px; cursor: pointer; font-weight: 600; font-size: 16px; color: var(--text-dark);
    transition: var(--transition);
}
.faq-question:hover { background: rgba(230,57,70,0.03); }
.faq-question i { transition: var(--transition); color: var(--primary); font-size: 18px; }
.faq-item.active .faq-question i { transform: rotate(180deg); }
.faq-answer {
    max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease;
    padding: 0 22px; color: var(--text-body); font-size: 15px; line-height: 1.7;
}
.faq-item.active .faq-answer {
    max-height: 400px; padding: 0 22px 20px;
}

/* ===== CTA ===== */
.cta-section {
    padding: 60px 0; background: linear-gradient(135deg, var(--secondary), #0d1b2a);
    color: var(--text-white); text-align: center;
}
.cta-section .cta-title { font-size: 30px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.cta-section .cta-desc { font-size: 17px; color: rgba(255,255,255,0.75); max-width: 600px; margin: 0 auto 28px; }
.cta-section .btn-cta {
    display: inline-block; padding: 14px 40px; border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff; font-size: 17px; font-weight: 700; transition: var(--transition);
    box-shadow: 0 6px 24px rgba(230,57,70,0.35);
}
.cta-section .btn-cta:hover { transform: translateY(-3px); box-shadow: 0 12px 36px rgba(230,57,70,0.45); color: #fff; }

/* ===== Footer ===== */
.footer {
    background: var(--secondary); color: rgba(255,255,255,0.85); padding: 60px 0 30px;
}
.footer-grid {
    display: grid; grid-template-columns: 1.8fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 36px;
}
.footer-logo {
    display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; color: #fff; margin-bottom: 12px;
}
.footer-logo .logo-icon {
    display: flex; align-items: center; justify-content: center;
    width: 36px; height: 36px; background: var(--primary); border-radius: var(--radius-sm);
    color: #fff; font-size: 16px;
}
.footer-brand p { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 340px; }
.footer-col h5 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 16px; }
.footer-col a {
    display: block; padding: 5px 0; font-size: 14px; color: rgba(255,255,255,0.6);
    transition: var(--transition);
}
.footer-col a:hover { color: #fff; padding-left: 4px; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.10); padding-top: 24px;
    display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
    font-size: 13px; color: rgba(255,255,255,0.45);
}
.footer-bottom a { color: rgba(255,255,255,0.6); }
.footer-bottom a:hover { color: #fff; }

/* ===== Content Not Found ===== */
.not-found-box {
    text-align: center; padding: 60px 20px; background: var(--bg-white);
    border-radius: var(--radius-md); box-shadow: var(--shadow-sm);
}
.not-found-box i { font-size: 56px; color: var(--primary-light); margin-bottom: 20px; }
.not-found-box h2 { font-size: 28px; margin-bottom: 12px; }
.not-found-box p { color: var(--text-weak); margin-bottom: 24px; }
.not-found-box .btn-home {
    display: inline-block; padding: 12px 32px; border-radius: var(--radius-sm);
    background: var(--primary); color: #fff; font-weight: 600; transition: var(--transition);
}
.not-found-box .btn-home:hover { background: var(--primary-dark); transform: translateY(-2px); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .article-layout { grid-template-columns: 1fr; }
    .news-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    :root { --header-height: 64px; }
    .nav-desktop { display: none; }
    .hamburger { display: flex; }
    .mobile-bottom-nav { display: block; }
    body { padding-bottom: 68px; }
    .article-hero { padding: 40px 0 28px; }
    .article-hero h1 { font-size: 24px; }
    .article-body { padding: 24px 20px; }
    .article-body .content { font-size: 15px; }
    .news-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .cta-section .cta-title { font-size: 24px; }
    .article-meta { gap: 14px; font-size: 13px; }
    .sidebar-card { padding: 18px; }
}
@media (max-width: 520px) {
    .container { padding: 0 14px; }
    .article-hero h1 { font-size: 20px; }
    .article-body { padding: 16px 14px; }
    .article-body .content h2 { font-size: 20px; }
    .article-body .content h3 { font-size: 17px; }
    .news-card img { height: 140px; }
    .faq-question { font-size: 14px; padding: 14px 16px; }
    .footer { padding: 40px 0 20px; }
    .article-share { flex-wrap: wrap; }
    .mobile-drawer a { font-size: 15px; padding: 12px 14px; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2563EB;
            --primary-light: #3B82F6;
            --primary-dark: #1D4ED8;
            --primary-bg: #EFF6FF;
            --accent: #F59E0B;
            --accent-light: #FBBF24;
            --accent-dark: #D97706;
            --bg: #F0F4FF;
            --bg-card: #FFFFFF;
            --bg-footer: #0F172A;
            --text: #1E293B;
            --text-secondary: #475569;
            --text-weak: #94A3B8;
            --text-light: #F8FAFC;
            --border: #E2E8F0;
            --border-light: #F1F5F9;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.07);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.09);
            --shadow-xl: 0 20px 60px rgba(0,0,0,0.12);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --max-width: 1200px;
            --header-height: 70px;
            --tab-height: 64px;
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-height);
            padding-bottom: 0;
        }
        @media (max-width: 768px) {
            body { padding-bottom: var(--tab-height); }
        }
        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); }
        button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        button { cursor: pointer; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
        h1 { font-size: 2.6rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1em; color: var(--text-secondary); }
        p:last-child { margin-bottom: 0; }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 600px) {
            .container { padding: 0 16px; }
            h1 { font-size: 1.9rem; }
            h2 { font-size: 1.5rem; }
            h3 { font-size: 1.2rem; }
        }
        .section-padding { padding: 80px 0; }
        @media (max-width: 768px) { .section-padding { padding: 50px 0; } }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            border: 2px solid transparent;
            text-align: center;
            justify-content: center;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37,99,235,0.35);
        }
        .btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(37,99,235,0.3); }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245,158,11,0.35);
        }
        .btn-accent:active { transform: translateY(0); }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline:active { transform: translateY(0); }
        .btn-lg { padding: 16px 36px; font-size: 1.1rem; border-radius: var(--radius-md); }
        .btn-sm { padding: 8px 18px; font-size: 0.875rem; }
        @media (max-width: 600px) {
            .btn { padding: 10px 22px; font-size: 0.95rem; }
            .btn-lg { padding: 14px 28px; font-size: 1rem; }
        }
        .btn:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; }

        /* ===== 标签 / 徽章 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 14px;
            border-radius: 999px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--primary-bg);
            color: var(--primary);
            border: 1px solid rgba(37,99,235,0.15);
        }
        .badge-accent {
            background: #FEF3C7;
            color: var(--accent-dark);
            border-color: rgba(245,158,11,0.2);
        }
        .badge-green {
            background: #D1FAE5;
            color: #059669;
            border-color: rgba(5,150,105,0.2);
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            padding: 28px;
            transition: var(--transition);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .card-img {
            border-radius: var(--radius-sm) var(--radius-sm) 0 0;
            width: 100%;
            height: 200px;
            object-fit: cover;
            margin-bottom: 0;
        }
        .card-body { padding: 20px 0 0; }
        .card-title { font-size: 1.15rem; margin-bottom: 8px; }
        .card-text { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.6; }
        .card-footer { padding-top: 16px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }

        /* ===== 网格 ===== */
        .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
        .grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 24px; }
        .grid-4 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 20px; }
        @media (max-width: 1024px) {
            .grid-4 { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; gap: 20px; }
        }

        /* ===== 头部导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .header.scrolled { box-shadow: var(--shadow-sm); }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.01em;
        }
        .header-logo .logo-icon {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 1.1rem;
        }
        .header-logo:hover { color: var(--primary); }
        .nav-desktop { display: flex; align-items: center; gap: 6px; }
        .nav-desktop a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .nav-desktop a:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .nav-desktop a.active {
            color: var(--primary);
            background: var(--primary-bg);
            font-weight: 600;
        }
        .nav-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }
        .nav-desktop a.nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            font-weight: 600;
        }
        .nav-desktop a.nav-cta:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(37,99,235,0.3);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 4px;
            cursor: pointer;
            border-radius: var(--radius-sm);
        }
        .hamburger span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: var(--text);
            border-radius: 3px;
            transition: var(--transition);
        }
        .hamburger:hover span { background: var(--primary); }
        .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
        @media (max-width: 768px) {
            .nav-desktop { display: none; }
            .hamburger { display: flex; }
            .nav-desktop.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                padding: 16px 24px 28px;
                gap: 8px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-lg);
            }
            .nav-desktop.open a { padding: 12px 16px; font-size: 1rem; }
            .nav-desktop.open a.active::after { display: none; }
            .nav-desktop.open a.nav-cta { text-align: center; }
        }

        /* ===== 移动端底部 Tab ===== */
        .mobile-tab {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 999;
            height: var(--tab-height);
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-top: 1px solid var(--border);
            box-shadow: 0 -2px 12px rgba(0,0,0,0.05);
            justify-content: space-around;
            align-items: center;
            padding: 0 8px;
        }
        .mobile-tab a {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 2px;
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            font-size: 0.7rem;
            font-weight: 500;
            color: var(--text-weak);
            transition: var(--transition);
            min-width: 64px;
        }
        .mobile-tab a i { font-size: 1.3rem; }
        .mobile-tab a:hover { color: var(--primary); background: var(--primary-bg); }
        .mobile-tab a.active { color: var(--primary); font-weight: 600; }
        .mobile-tab a.active i { color: var(--primary); }
        @media (max-width: 768px) {
            .mobile-tab { display: flex; }
        }

        /* ===== Hero / Banner ===== */
        .hero {
            padding: 100px 0 80px;
            background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 50%, #E0E7FF 100%);
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.15;
            pointer-events: none;
        }
        .hero .container { position: relative; z-index: 1; }
        .hero-content { max-width: 720px; }
        .hero h1 { margin-bottom: 16px; }
        .hero h1 span { color: var(--primary); }
        .hero p {
            font-size: 1.15rem;
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 600px;
        }
        .hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
        .hero-badge { display: inline-flex; gap: 8px; margin-bottom: 16px; }
        @media (max-width: 768px) {
            .hero { padding: 70px 0 50px; }
            .hero h1 { font-size: 1.9rem; }
            .hero p { font-size: 1rem; }
        }
        @media (max-width: 600px) {
            .hero-actions { flex-direction: column; align-items: stretch; }
            .hero-actions .btn { justify-content: center; }
        }

        /* ===== 板块通用 ===== */
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 { margin-bottom: 12px; }
        .section-title p {
            max-width: 600px;
            margin: 0 auto;
            color: var(--text-secondary);
            font-size: 1.05rem;
        }
        .section-title .badge { margin-bottom: 12px; }
        @media (max-width: 768px) {
            .section-title { margin-bottom: 32px; }
        }

        /* ===== 登录方式 ===== */
        .methods-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
        .method-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .method-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-6px);
        }
        .method-icon {
            width: 60px;
            height: 60px;
            margin: 0 auto 16px;
            border-radius: var(--radius-md);
            background: var(--primary-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .method-card:hover .method-icon { background: var(--primary); color: #fff; }
        .method-card h4 { margin-bottom: 6px; font-size: 1.05rem; }
        .method-card p { font-size: 0.9rem; color: var(--text-weak); margin-bottom: 0; }
        @media (max-width: 1024px) { .methods-grid { grid-template-columns: repeat(2,1fr); } }
        @media (max-width: 600px) { .methods-grid { grid-template-columns: 1fr 1fr; gap: 14px; } }

        /* ===== 步骤 ===== */
        .steps { display: flex; gap: 0; position: relative; counter-reset: step; }
        .step-item {
            flex: 1;
            text-align: center;
            padding: 0 16px;
            position: relative;
        }
        .step-item::before {
            content: '';
            position: absolute;
            top: 32px;
            left: 50%;
            right: -50%;
            height: 3px;
            background: var(--border);
            z-index: 0;
        }
        .step-item:last-child::before { display: none; }
        .step-num {
            position: relative;
            z-index: 1;
            width: 64px;
            height: 64px;
            margin: 0 auto 16px;
            border-radius: 50%;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 1.5rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 3px solid var(--primary);
            transition: var(--transition);
        }
        .step-item:hover .step-num { background: var(--primary); color: #fff; }
        .step-item h4 { font-size: 1.05rem; margin-bottom: 6px; }
        .step-item p { font-size: 0.9rem; color: var(--text-weak); margin-bottom: 0; }
        @media (max-width: 768px) {
            .steps { flex-direction: column; gap: 24px; }
            .step-item::before { display: none; }
            .step-item { display: flex; gap: 16px; text-align: left; padding: 0; }
            .step-num { flex-shrink: 0; width: 48px; height: 48px; font-size: 1.2rem; margin: 0; }
        }

        /* ===== 数据统计 ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
        .stat-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 16px;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
        }
        .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .stat-card p { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: 0; }
        @media (max-width: 768px) { .stats-grid { grid-template-columns: repeat(2,1fr); } }
        @media (max-width: 480px) { .stat-number { font-size: 2rem; } }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow-md); }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            transition: var(--transition);
            background: none;
            width: 100%;
            text-align: left;
        }
        .faq-question:hover { color: var(--primary); }
        .faq-question i { transition: var(--transition); font-size: 0.85rem; color: var(--text-weak); }
        .faq-item.open .faq-question i { transform: rotate(180deg); color: var(--primary); }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }
        @media (max-width: 600px) {
            .faq-question { padding: 14px 16px; font-size: 0.95rem; }
            .faq-answer { padding: 0 16px 14px; }
        }

        /* ===== 安全提示 ===== */
        .safety-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
        .safety-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            gap: 18px;
            align-items: flex-start;
        }
        .safety-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
        .safety-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: #FEF3C7;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--accent-dark);
            flex-shrink: 0;
        }
        .safety-card h4 { font-size: 1rem; margin-bottom: 4px; }
        .safety-card p { font-size: 0.9rem; color: var(--text-weak); margin-bottom: 0; }
        @media (max-width: 768px) { .safety-grid { grid-template-columns: 1fr; } }

        /* ===== 最新资讯 ===== */
        .news-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .news-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .news-card img { width: 100%; height: 180px; object-fit: cover; border-radius: 0; }
        .news-body { padding: 18px 20px 20px; }
        .news-body .badge { margin-bottom: 10px; }
        .news-body h4 { font-size: 1.05rem; margin-bottom: 6px; }
        .news-body p { font-size: 0.9rem; color: var(--text-weak); margin-bottom: 0; }
        .news-meta { font-size: 0.8rem; color: var(--text-weak); margin-top: 12px; display: flex; gap: 16px; }
        @media (max-width: 768px) { .news-grid { grid-template-columns: 1fr; } }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 80px 0;
            text-align: center;
            color: #fff;
            border-radius: 0;
        }
        .cta-section h2 { color: #fff; margin-bottom: 12px; }
        .cta-section p { color: rgba(255,255,255,0.85); margin-bottom: 28px; max-width: 540px; margin-left: auto; margin-right: auto; }
        .cta-section .btn { background: #fff; color: var(--primary); border-color: #fff; }
        .cta-section .btn:hover { background: var(--accent); color: #fff; border-color: var(--accent); transform: translateY(-3px); box-shadow: 0 12px 32px rgba(0,0,0,0.2); }
        @media (max-width: 768px) { .cta-section { padding: 50px 0; } }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-footer);
            color: rgba(255,255,255,0.85);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 40px;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-logo .logo-icon {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
        }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.6); line-height: 1.7; }
        .footer-col h5 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: #fff; padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.5);
        }
        .footer-bottom a { color: rgba(255,255,255,0.6); }
        .footer-bottom a:hover { color: #fff; }
        @media (max-width: 1024px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
        @media (max-width: 600px) { .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; } }

        /* ===== 图片装饰 ===== */
        .img-deco {
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            background: var(--bg-card);
        }
        .img-rounded { border-radius: var(--radius-lg); }

        /* ===== 辅助工具 ===== */
        .text-center { text-align: center; }
        .mt-1 { margin-top: 16px; }
        .mt-2 { margin-top: 32px; }
        .mb-1 { margin-bottom: 16px; }
        .gap-1 { gap: 16px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .flex-wrap { flex-wrap: wrap; }

        /* ===== 分隔线 ===== */
        .divider {
            width: 60px;
            height: 4px;
            border-radius: 4px;
            background: var(--primary);
            margin: 12px auto 16px;
        }
        .divider-left { margin: 12px 0 16px; }

        /* ===== 响应式微调 ===== */
        @media (max-width: 480px) {
            .header-inner { padding: 0 14px; }
            .header-logo { font-size: 1.1rem; }
            .header-logo .logo-icon { width: 32px; height: 32px; font-size: 0.9rem; }
        }

        /* ===== 斑马背景 ===== */
        .bg-white { background: #fff; }
        .bg-alt { background: var(--bg); }
        .bg-primary-light { background: var(--primary-bg); }

        /* ===== 特殊圆角卡片组合 ===== */
        .feature-pair {
            display: flex;
            align-items: center;
            gap: 40px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 40px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
        }
        .feature-pair.reverse { flex-direction: row-reverse; }
        .feature-pair .text { flex: 1; }
        .feature-pair .media { flex: 1; }
        .feature-pair .media img { border-radius: var(--radius-md); width: 100%; height: auto; }
        @media (max-width: 768px) {
            .feature-pair { flex-direction: column; padding: 24px; gap: 24px; }
            .feature-pair.reverse { flex-direction: column; }
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-weak);
            padding: 16px 0 0;
            flex-wrap: wrap;
        }
        .breadcrumb a { color: var(--text-weak); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb span { color: var(--text-secondary); }
        .breadcrumb i { font-size: 0.65rem; color: var(--text-weak); }