/* roulang page: index */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --secondary: #0f172a;
            --accent: #f59e0b;
            --bg-body: #ffffff;
            --bg-soft: #f8fafc;
            --bg-card: #ffffff;
            --text-main: #0f172a;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --border: #e2e8f0;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 240px;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: var(--bg-body);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
        }
        a { color: inherit; text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 600; color: var(--text-main); }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        .container-narrow { max-width: 900px; margin: 0 auto; padding: 0 24px; }

        /* Layout */
        .layout { display: flex; min-height: 100vh; }
        .sidebar {
            width: var(--sidebar-width);
            position: fixed; top: 0; left: 0; bottom: 0;
            background: var(--bg-body);
            border-right: 1px solid var(--border);
            z-index: 100;
            display: flex; flex-direction: column;
            padding: 28px 20px;
            transition: transform var(--transition);
        }
        .sidebar .logo {
            font-size: 20px; font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
            padding: 0 8px 24px 8px;
            border-bottom: 1px solid var(--border);
            margin-bottom: 24px;
            display: flex; align-items: center; gap: 10px;
        }
        .sidebar .logo i { font-size: 26px; color: var(--primary); }
        .sidebar .nav-links { flex: 1; display: flex; flex-direction: column; gap: 4px; }
        .sidebar .nav-links a {
            display: flex; align-items: center; gap: 12px;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            font-size: 15px; font-weight: 500;
            color: var(--text-muted);
            transition: all var(--transition);
        }
        .sidebar .nav-links a i { width: 20px; text-align: center; font-size: 16px; }
        .sidebar .nav-links a:hover { background: var(--primary-light); color: var(--primary); }
        .sidebar .nav-links a.active { background: var(--primary); color: #fff; box-shadow: 0 2px 8px rgba(37,99,235,0.3); }
        .sidebar .nav-links a.active:hover { background: var(--primary-dark); color: #fff; }
        .sidebar .footer-meta {
            margin-top: auto;
            padding-top: 16px;
            border-top: 1px solid var(--border);
            font-size: 12px; color: var(--text-light);
            text-align: center;
        }
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-width: 0;
        }

        /* Mobile nav */
        .mobile-header {
            display: none;
            position: sticky; top: 0; z-index: 99;
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            padding: 12px 20px;
            align-items: center; justify-content: space-between;
        }
        .mobile-header .logo { font-size: 18px; font-weight: 700; color: var(--primary); display: flex; align-items: center; gap: 8px; }
        .mobile-header .logo i { font-size: 22px; }
        .mobile-header .hamburger { background: none; border: none; font-size: 22px; color: var(--text-main); cursor: pointer; padding: 6px; border-radius: 6px; }
        .mobile-header .hamburger:hover { background: var(--bg-soft); }
        .mobile-overlay {
            display: none;
            position: fixed; inset: 0; z-index: 98;
            background: rgba(0,0,0,0.4);
            backdrop-filter: blur(4px);
        }
        .mobile-overlay.open { display: block; }
        .sidebar.open { transform: translateX(0); }

        /* Hero */
        .hero {
            position: relative;
            padding: 100px 40px 80px;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 60%, #0f172a 100%);
            overflow: hidden;
            display: flex; align-items: center; justify-content: center;
            min-height: 520px;
        }
        .hero::before {
            content: '';
            position: absolute; inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover; background-position: center; background-blend-mode: overlay;
            opacity: 0.18;
        }
        .hero .hero-bg-pattern {
            position: absolute; inset: 0;
            background-image: radial-gradient(circle at 25% 40%, rgba(37,99,235,0.1) 0%, transparent 60%),
                              radial-gradient(circle at 75% 60%, rgba(245,158,11,0.08) 0%, transparent 50%);
        }
        .hero-content { position: relative; z-index: 2; text-align: center; max-width: 780px; }
        .hero h1 {
            font-size: 42px; font-weight: 800; color: #fff;
            letter-spacing: -0.5px; line-height: 1.2;
            margin-bottom: 20px;
        }
        .hero h1 span { color: var(--accent); }
        .hero p {
            font-size: 18px; color: rgba(255,255,255,0.75);
            max-width: 640px; margin: 0 auto 32px;
            line-height: 1.7;
        }
        .hero .hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .hero .btn-primary {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 14px 36px;
            background: var(--primary); color: #fff;
            border-radius: 50px; font-weight: 600; font-size: 16px;
            border: none; cursor: pointer;
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(37,99,235,0.35);
        }
        .hero .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37,99,235,0.45); }
        .hero .btn-secondary {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 14px 36px;
            background: rgba(255,255,255,0.1); color: #fff;
            border-radius: 50px; font-weight: 500; font-size: 16px;
            border: 1px solid rgba(255,255,255,0.2); cursor: pointer;
            transition: all var(--transition);
        }
        .hero .btn-secondary:hover { background: rgba(255,255,255,0.18); border-color: rgba(255,255,255,0.35); transform: translateY(-2px); }
        .hero .hero-badge {
            display: inline-block;
            background: rgba(37,99,235,0.2); color: var(--accent);
            padding: 6px 18px; border-radius: 50px;
            font-size: 14px; font-weight: 500;
            margin-bottom: 20px;
            border: 1px solid rgba(37,99,235,0.25);
        }

        /* Section common */
        .section { padding: 80px 40px; }
        .section-title { text-align: center; margin-bottom: 56px; }
        .section-title h2 { font-size: 34px; font-weight: 700; margin-bottom: 14px; }
        .section-title p { color: var(--text-muted); max-width: 600px; margin: 0 auto; font-size: 16px; line-height: 1.7; }
        .section.bg-soft { background: var(--bg-soft); }
        .section.bg-dark { background: var(--secondary); color: rgba(255,255,255,0.85); }
        .section.bg-dark .section-title h2 { color: #fff; }
        .section.bg-dark .section-title p { color: rgba(255,255,255,0.6); }

        /* Cards */
        .card-grid { display: grid; gap: 28px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 28px 24px;
            transition: all var(--transition);
            box-shadow: var(--shadow);
        }
        .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--primary-light); }
        .card .card-icon { width: 52px; height: 52px; border-radius: 12px; background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 22px; margin-bottom: 18px; }
        .card h3 { font-size: 18px; font-weight: 600; margin-bottom: 10px; }
        .card p { color: var(--text-muted); font-size: 14px; line-height: 1.7; }
        .card .card-tag {
            display: inline-block;
            background: var(--primary-light); color: var(--primary);
            padding: 2px 12px; border-radius: 50px;
            font-size: 12px; font-weight: 500;
            margin-bottom: 14px;
        }

        /* Feature card with image */
        .card-cover {
            overflow: hidden; padding: 0;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all var(--transition);
        }
        .card-cover:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .card-cover .cover-img { width: 100%; height: 200px; object-fit: cover; }
        .card-cover .cover-body { padding: 22px 24px 26px; }
        .card-cover .cover-body h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
        .card-cover .cover-body p { color: var(--text-muted); font-size: 14px; line-height: 1.7; margin-bottom: 14px; }
        .card-cover .cover-body .meta { font-size: 13px; color: var(--text-light); display: flex; gap: 16px; }
        .card-cover .cover-body .meta i { margin-right: 4px; }

        /* Stats */
        .stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 32px; text-align: center; }
        .stat-item .stat-number { font-size: 40px; font-weight: 800; color: var(--primary); line-height: 1.1; }
        .stat-item .stat-label { color: var(--text-muted); font-size: 15px; margin-top: 6px; }
        .section.bg-dark .stat-item .stat-number { color: var(--accent); }
        .section.bg-dark .stat-item .stat-label { color: rgba(255,255,255,0.6); }

        /* Steps */
        .steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 32px; counter-reset: step; }
        .step-item { text-align: center; position: relative; padding: 32px 20px; }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            display: block;
            width: 48px; height: 48px; line-height: 48px;
            border-radius: 50%;
            background: var(--primary-light); color: var(--primary);
            font-size: 20px; font-weight: 700;
            margin: 0 auto 16px;
        }
        .step-item h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
        .step-item p { color: var(--text-muted); font-size: 14px; line-height: 1.7; max-width: 260px; margin: 0 auto; }

        /* FAQ */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item { border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; background: var(--bg-card); }
        .faq-item .faq-q {
            padding: 18px 24px; font-weight: 600; font-size: 16px;
            cursor: pointer; display: flex; justify-content: space-between; align-items: center;
            transition: background var(--transition);
            user-select: none;
        }
        .faq-item .faq-q:hover { background: var(--bg-soft); }
        .faq-item .faq-q i { transition: transform var(--transition); color: var(--text-muted); font-size: 14px; }
        .faq-item.open .faq-q i { transform: rotate(180deg); }
        .faq-item .faq-a {
            padding: 0 24px 18px;
            color: var(--text-muted); font-size: 15px; line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-a { display: block; }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 72px 40px;
            text-align: center;
            color: #fff;
        }
        .cta-section h2 { font-size: 34px; font-weight: 700; color: #fff; margin-bottom: 14px; }
        .cta-section p { color: rgba(255,255,255,0.8); max-width: 560px; margin: 0 auto 28px; font-size: 16px; }
        .cta-section .btn-cta {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 16px 44px;
            background: #fff; color: var(--primary);
            border-radius: 50px; font-weight: 600; font-size: 17px;
            border: none; cursor: pointer;
            transition: all var(--transition);
            box-shadow: 0 4px 20px rgba(0,0,0,0.15);
        }
        .cta-section .btn-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,0,0,0.2); }

        /* Footer */
        .footer {
            background: var(--secondary);
            color: rgba(255,255,255,0.7);
            padding: 48px 40px 28px;
        }
        .footer .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; }
        .footer h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 16px; }
        .footer p, .footer a { font-size: 14px; color: rgba(255,255,255,0.6); line-height: 1.8; }
        .footer a:hover { color: #fff; }
        .footer .footer-links { display: flex; flex-direction: column; gap: 6px; }
        .footer .footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px; margin-top: 40px; text-align: center; font-size: 13px; color: rgba(255,255,255,0.4); }

        /* CMS list */
        .cms-list { display: grid; gap: 24px; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
        .cms-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            transition: all var(--transition);
            box-shadow: var(--shadow);
        }
        .cms-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--primary-light); }
        .cms-item .cms-cat {
            display: inline-block;
            background: var(--primary-light); color: var(--primary);
            padding: 2px 12px; border-radius: 50px;
            font-size: 12px; font-weight: 500;
            margin-bottom: 10px;
        }
        .cms-item h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
        .cms-item h3 a { color: var(--text-main); }
        .cms-item h3 a:hover { color: var(--primary); }
        .cms-item p { color: var(--text-muted); font-size: 14px; line-height: 1.7; margin-bottom: 12px; }
        .cms-item .cms-meta { font-size: 13px; color: var(--text-light); display: flex; gap: 16px; flex-wrap: wrap; }
        .cms-item .cms-meta i { margin-right: 4px; }

        /* Responsive */
        @media (max-width: 1023px) {
            .sidebar { transform: translateX(-100%); }
            .sidebar.open { transform: translateX(0); }
            .main-content { margin-left: 0; }
            .mobile-header { display: flex; }
            .hero { padding: 72px 24px 56px; min-height: 420px; }
            .hero h1 { font-size: 32px; }
            .hero p { font-size: 16px; }
            .section { padding: 56px 24px; }
            .section-title h2 { font-size: 28px; }
            .footer .footer-grid { grid-template-columns: 1fr 1fr; }
            .cta-section { padding: 56px 24px; }
            .cta-section h2 { font-size: 28px; }
        }
        @media (max-width: 767px) {
            .hero { padding: 56px 20px 44px; min-height: 340px; }
            .hero h1 { font-size: 26px; }
            .hero p { font-size: 15px; margin-bottom: 24px; }
            .hero .hero-actions { flex-direction: column; align-items: center; }
            .hero .btn-primary, .hero .btn-secondary { width: 100%; max-width: 280px; justify-content: center; }
            .section { padding: 44px 16px; }
            .section-title { margin-bottom: 32px; }
            .section-title h2 { font-size: 24px; }
            .card-grid { grid-template-columns: 1fr; }
            .cms-list { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
            .stat-item .stat-number { font-size: 30px; }
            .steps-grid { grid-template-columns: 1fr; gap: 20px; }
            .footer .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer { padding: 32px 16px 20px; }
            .cta-section { padding: 44px 16px; }
            .cta-section h2 { font-size: 24px; }
            .faq-item .faq-q { padding: 14px 18px; font-size: 15px; }
            .faq-item .faq-a { padding: 0 18px 14px; }
            .hero .hero-badge { font-size: 12px; padding: 4px 14px; }
        }
        @media (max-width: 480px) {
            .hero h1 { font-size: 22px; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .stat-item .stat-number { font-size: 26px; }
            .card-grid { gap: 16px; }
            .cms-list { gap: 16px; }
        }

        /* Accessibility */
        a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

/* roulang page: article */
:root {
            --primary: #0c8ee7;
            --primary-dark: #0070c4;
            --primary-light: #e0effe;
            --accent: #d946ef;
            --bg-body: #f8fafc;
            --text-dark: #0f172a;
            --text-muted: #64748b;
            --border-light: #e2e8f0;
            --radius-card: 0.75rem;
            --radius-btn: 0.5rem;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 10px 30px rgba(0,0,0,0.1);
        }

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

        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            background: var(--bg-body);
            color: var(--text-dark);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s;
        }

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

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

        /* ===== 左侧导航 ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 260px;
            height: 100vh;
            background: #ffffff;
            border-right: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
            padding: 28px 20px;
            z-index: 100;
            transition: transform 0.3s ease;
            box-shadow: 2px 0 12px rgba(0,0,0,0.04);
        }

        .sidebar .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 36px;
            padding: 0 4px;
            letter-spacing: -0.3px;
        }

        .sidebar .logo i {
            font-size: 1.6rem;
            color: var(--primary);
        }

        .sidebar .nav-links {
            list-style: none;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .sidebar .nav-links li a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: 10px;
            font-size: 0.95rem;
            font-weight: 500;
            color: #334155;
            transition: all 0.2s;
        }

        .sidebar .nav-links li a i {
            width: 20px;
            text-align: center;
            font-size: 1.05rem;
            color: #94a3b8;
            transition: color 0.2s;
        }

        .sidebar .nav-links li a:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
        }

        .sidebar .nav-links li a:hover i {
            color: var(--primary);
        }

        .sidebar .nav-links li a.active {
            background: var(--primary-light);
            color: var(--primary-dark);
            font-weight: 600;
        }

        .sidebar .nav-links li a.active i {
            color: var(--primary);
        }

        .sidebar .footer-meta {
            margin-top: auto;
            padding: 16px 12px 8px;
            border-top: 1px solid var(--border-light);
            font-size: 0.8rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar .footer-meta i {
            color: var(--primary);
            font-size: 0.9rem;
        }

        /* 主内容区 */
        .main-wrapper {
            margin-left: 260px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .main-content {
            flex: 1;
            padding: 40px 0 60px;
        }

        @media (max-width: 1024px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .main-wrapper {
                margin-left: 0;
            }
            .mobile-menu-toggle {
                display: flex !important;
            }
        }

        .mobile-menu-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 110;
            background: #ffffff;
            border: 1px solid var(--border-light);
            border-radius: 10px;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--text-dark);
            cursor: pointer;
            box-shadow: var(--shadow-sm);
            transition: background 0.2s;
        }

        .mobile-menu-toggle:hover {
            background: var(--primary-light);
        }

        .mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.4);
            z-index: 99;
            backdrop-filter: blur(2px);
        }

        .mobile-overlay.show {
            display: block;
        }

        @media (max-width: 1024px) {
            .mobile-overlay.show {
                display: block;
            }
        }

        /* ===== 文章详情 ===== */
        .article-hero {
            position: relative;
            background: linear-gradient(135deg, #0b406d 0%, #01599f 50%, #0c8ee7 100%);
            padding: 80px 0 60px;
            color: #ffffff;
            overflow: hidden;
        }

        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }

        .article-hero .container {
            position: relative;
            z-index: 2;
        }

        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.7);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .article-hero .breadcrumb a {
            color: rgba(255,255,255,0.8);
            transition: color 0.2s;
        }

        .article-hero .breadcrumb a:hover {
            color: #ffffff;
        }

        .article-hero .breadcrumb i {
            font-size: 0.7rem;
            color: rgba(255,255,255,0.5);
        }

        .article-hero h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .article-hero .meta {
            display: flex;
            align-items: center;
            gap: 20px;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.8);
            flex-wrap: wrap;
        }

        .article-hero .meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-hero .meta i {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.6);
        }

        .article-hero .category-badge {
            display: inline-block;
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(4px);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
            color: #ffffff;
            border: 1px solid rgba(255,255,255,0.2);
            margin-bottom: 16px;
        }

        .article-body {
            padding: 48px 0 60px;
        }

        .article-body .container {
            max-width: 860px;
        }

        .article-content {
            background: #ffffff;
            border-radius: 1rem;
            padding: 48px 52px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            font-size: 1.05rem;
            line-height: 1.9;
            color: #1e293b;
        }

        .article-content h2,
        .article-content h3,
        .article-content h4 {
            margin-top: 1.8em;
            margin-bottom: 0.6em;
            font-weight: 700;
            color: #0f172a;
            line-height: 1.4;
        }

        .article-content h2 {
            font-size: 1.6rem;
            border-bottom: 2px solid var(--primary-light);
            padding-bottom: 8px;
        }

        .article-content h3 {
            font-size: 1.3rem;
        }

        .article-content p {
            margin-bottom: 1.2em;
        }

        .article-content ul,
        .article-content ol {
            margin-bottom: 1.2em;
            padding-left: 1.8em;
        }

        .article-content li {
            margin-bottom: 0.4em;
        }

        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }

        .article-content a:hover {
            color: var(--primary-dark);
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 16px 24px;
            margin: 1.5em 0;
            border-radius: 0 8px 8px 0;
            color: #1e293b;
        }

        .article-content code {
            background: #f1f5f9;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: #c026d3;
        }

        .article-content pre {
            background: #0f172a;
            color: #e2e8f0;
            padding: 20px 24px;
            border-radius: 10px;
            overflow-x: auto;
            margin: 1.5em 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }

        .article-content pre code {
            background: transparent;
            color: inherit;
            padding: 0;
            font-size: inherit;
        }

        .article-content img {
            border-radius: 10px;
            margin: 1.5em 0;
            box-shadow: var(--shadow-sm);
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5em 0;
            font-size: 0.95rem;
        }

        .article-content th,
        .article-content td {
            border: 1px solid var(--border-light);
            padding: 12px 16px;
            text-align: left;
        }

        .article-content th {
            background: #f8fafc;
            font-weight: 600;
        }

        .article-content hr {
            border: none;
            border-top: 2px solid var(--border-light);
            margin: 2em 0;
        }

        .article-not-found {
            text-align: center;
            padding: 80px 20px;
            background: #ffffff;
            border-radius: 1rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }

        .article-not-found i {
            font-size: 3.5rem;
            color: #cbd5e1;
            margin-bottom: 20px;
        }

        .article-not-found h2 {
            font-size: 1.6rem;
            color: #334155;
            margin-bottom: 12px;
        }

        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .article-not-found a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #ffffff;
            padding: 12px 28px;
            border-radius: 10px;
            font-weight: 600;
            transition: background 0.2s, transform 0.2s;
        }

        .article-not-found a:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }

        /* ===== 相关文章 ===== */
        .related-section {
            padding: 48px 0 60px;
            background: #ffffff;
            border-top: 1px solid var(--border-light);
        }

        .related-section .section-title {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 32px;
            color: #0f172a;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .related-section .section-title i {
            color: var(--primary);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: #ffffff;
            border: 1px solid var(--border-light);
            border-radius: 0.75rem;
            padding: 24px;
            transition: all 0.3s;
            box-shadow: var(--shadow-sm);
        }

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

        .related-card .tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 12px;
            margin-bottom: 12px;
        }

        .related-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: #0f172a;
            line-height: 1.4;
        }

        .related-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 12px;
        }

        .related-card .read-more {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .related-card .read-more i {
            font-size: 0.75rem;
            transition: transform 0.2s;
        }

        .related-card:hover .read-more i {
            transform: translateX(4px);
        }

        /* ===== CTA ===== */
        .article-cta {
            background: linear-gradient(135deg, #0b406d 0%, #0070c4 100%);
            padding: 60px 0;
            color: #ffffff;
            text-align: center;
        }

        .article-cta h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .article-cta p {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.85);
            max-width: 600px;
            margin: 0 auto 28px;
        }

        .article-cta .btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .article-cta .btn-primary {
            background: #ffffff;
            color: var(--primary-dark);
            padding: 14px 36px;
            border-radius: 10px;
            font-weight: 700;
            font-size: 1rem;
            transition: all 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .article-cta .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0,0,0,0.2);
        }

        .article-cta .btn-outline {
            background: transparent;
            color: #ffffff;
            border: 2px solid rgba(255,255,255,0.4);
            padding: 12px 32px;
            border-radius: 10px;
            font-weight: 600;
            font-size: 1rem;
            transition: all 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .article-cta .btn-outline:hover {
            border-color: #ffffff;
            background: rgba(255,255,255,0.1);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 48px 0 32px;
        }

        .footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer h4 {
            color: #ffffff;
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer h4 i {
            color: var(--primary);
        }

        .footer p {
            font-size: 0.88rem;
            line-height: 1.7;
            color: #94a3b8;
        }

        .footer .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer .footer-links a {
            font-size: 0.88rem;
            color: #94a3b8;
            transition: color 0.2s;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .footer .footer-links a:hover {
            color: #ffffff;
        }

        .footer .footer-links a i {
            font-size: 0.7rem;
            color: var(--primary);
        }

        .footer .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 24px;
            font-size: 0.82rem;
            color: #64748b;
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 8px;
        }

        @media (max-width: 768px) {
            .footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .main-wrapper {
                margin-left: 0;
            }
            .mobile-menu-toggle {
                display: flex !important;
            }
            .article-hero h1 {
                font-size: 1.8rem;
            }
            .article-content {
                padding: 28px 24px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .article-hero {
                padding: 60px 0 40px;
            }
            .article-hero h1 {
                font-size: 1.4rem;
            }
            .article-hero .meta {
                gap: 12px;
                font-size: 0.8rem;
            }
            .article-content {
                padding: 20px 16px;
                font-size: 0.95rem;
            }
            .article-content h2 {
                font-size: 1.3rem;
            }
            .article-content h3 {
                font-size: 1.1rem;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .article-cta h2 {
                font-size: 1.4rem;
            }
            .article-cta .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #0f172a;
            --secondary: #1e293b;
            --accent: #3b82f6;
            --accent-light: #60a5fa;
            --accent-dark: #2563eb;
            --surface: #f8fafc;
            --surface-alt: #f1f5f9;
            --muted: #64748b;
            --muted-light: #94a3b8;
            --border: #e2e8f0;
            --radius: 0.75rem;
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
            --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
            background: var(--surface);
            color: var(--primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            transition: var(--transition);
        }

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

        ::selection {
            background: var(--accent);
            color: #fff;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 1rem;
            }
        }

        /* ===== 左侧导航 ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 260px;
            height: 100vh;
            background: var(--primary);
            color: #fff;
            display: flex;
            flex-direction: column;
            padding: 2rem 1.5rem;
            z-index: 100;
            transition: var(--transition);
            overflow-y: auto;
        }

        .sidebar .logo {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 2.5rem;
            letter-spacing: -0.01em;
            transition: var(--transition);
        }

        .sidebar .logo i {
            color: var(--accent-light);
            font-size: 1.6rem;
        }

        .sidebar .logo:hover {
            opacity: 0.9;
        }

        .nav-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.25rem;
            flex: 1;
        }

        .nav-links li a {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0.7rem 1rem;
            border-radius: var(--radius);
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
        }

        .nav-links li a i {
            width: 1.25rem;
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.5);
            transition: var(--transition);
        }

        .nav-links li a:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }

        .nav-links li a:hover i {
            color: var(--accent-light);
        }

        .nav-links li a.active {
            background: rgba(59, 130, 246, 0.2);
            color: #fff;
            font-weight: 600;
        }

        .nav-links li a.active i {
            color: var(--accent-light);
        }

        .sidebar .footer-meta {
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.4);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .sidebar .footer-meta i {
            color: var(--accent-light);
        }

        /* ===== 右侧主内容 ===== */
        .main-content {
            margin-left: 260px;
            min-height: 100vh;
            background: var(--surface);
        }

        /* ===== 移动端导航切换 ===== */
        .mobile-toggle {
            display: none;
            position: fixed;
            top: 1rem;
            left: 1rem;
            z-index: 200;
            background: var(--primary);
            color: #fff;
            border: none;
            width: 44px;
            height: 44px;
            border-radius: var(--radius);
            font-size: 1.25rem;
            cursor: pointer;
            box-shadow: var(--shadow-lg);
            transition: var(--transition);
            align-items: center;
            justify-content: center;
        }

        .mobile-toggle:hover {
            background: var(--secondary);
        }

        .mobile-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 99;
            backdrop-filter: blur(4px);
        }

        @media (max-width: 1024px) {
            .sidebar {
                transform: translateX(-100%);
                width: 280px;
            }

            .sidebar.open {
                transform: translateX(0);
            }

            .main-content {
                margin-left: 0;
            }

            .mobile-toggle {
                display: flex;
            }

            .mobile-overlay.active {
                display: block;
            }
        }

        @media (min-width: 1025px) {
            .sidebar {
                transform: translateX(0) !important;
            }
            .mobile-overlay {
                display: none !important;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 4rem 0;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(15, 23, 42, 0.7) 50%, rgba(15, 23, 42, 0.5) 100%);
            z-index: 1;
        }

        .hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(59, 130, 246, 0.2);
            border: 1px solid rgba(59, 130, 246, 0.3);
            color: var(--accent-light);
            padding: 0.4rem 1rem;
            border-radius: 9999px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 1.5rem;
            backdrop-filter: blur(8px);
        }

        .hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.15;
            letter-spacing: -0.02em;
            max-width: 800px;
            margin-bottom: 1.25rem;
        }

        .hero h1 span {
            background: linear-gradient(135deg, var(--accent-light), #93c5fd);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 640px;
            line-height: 1.7;
            margin-bottom: 2rem;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1.75rem;
            border-radius: var(--radius);
            font-size: 0.95rem;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
            justify-content: center;
        }

        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(59, 130, 246, 0.35);
        }

        .btn-primary:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(59, 130, 246, 0.45);
        }

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

        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.3);
        }

        .btn-outline-light:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }

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

        .btn-lg {
            padding: 1rem 2.25rem;
            font-size: 1.05rem;
        }

        @media (max-width: 768px) {
            .hero {
                min-height: 400px;
                padding: 3rem 0;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero-actions {
                flex-direction: column;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 5rem 0;
        }

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

        .section-title {
            font-size: 2.25rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.01em;
            margin-bottom: 0.75rem;
            line-height: 1.2;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--muted);
            max-width: 600px;
            line-height: 1.7;
        }

        .section-header {
            margin-bottom: 3rem;
        }

        .section-header.centered {
            text-align: center;
        }

        .section-header.centered .section-subtitle {
            margin: 0 auto;
        }

        @media (max-width: 768px) {
            .section {
                padding: 3rem 0;
            }
            .section-title {
                font-size: 1.75rem;
            }
            .section-subtitle {
                font-size: 1rem;
            }
        }

        /* ===== 网格卡片 ===== */
        .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;
        }

        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
        }

        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .grid-3,
            .grid-4,
            .grid-2 {
                grid-template-columns: 1fr;
            }
        }

        .card {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 1.75rem;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }

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

        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.35rem;
            margin-bottom: 1.25rem;
            background: rgba(59, 130, 246, 0.1);
            color: var(--accent);
        }

        .card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--primary);
        }

        .card p {
            font-size: 0.95rem;
            color: var(--muted);
            line-height: 1.7;
        }

        .card .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            background: rgba(59, 130, 246, 0.08);
            color: var(--accent);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            margin-top: 0.75rem;
        }

        /* ===== 图文区块 ===== */
        .feature-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }

        .feature-image {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-xl);
            background: var(--surface-alt);
        }

        .feature-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 320px;
        }

        .feature-content h3 {
            font-size: 1.75rem;
            font-weight: 800;
            margin-bottom: 1rem;
            color: var(--primary);
            line-height: 1.3;
        }

        .feature-content p {
            font-size: 1rem;
            color: var(--muted);
            line-height: 1.8;
            margin-bottom: 1.25rem;
        }

        .feature-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
            font-size: 0.95rem;
            color: var(--primary);
        }

        .feature-list li i {
            color: var(--accent);
            margin-top: 0.2rem;
            flex-shrink: 0;
        }

        @media (max-width: 768px) {
            .feature-row {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .feature-row.reverse {
                direction: ltr;
            }
            .feature-content h3 {
                font-size: 1.4rem;
            }
            .feature-image img {
                min-height: 220px;
            }
        }

        .feature-row.reverse .feature-image {
            order: 2;
        }

        .feature-row.reverse .feature-content {
            order: 1;
        }

        @media (max-width: 768px) {
            .feature-row.reverse .feature-image {
                order: 1;
            }
            .feature-row.reverse .feature-content {
                order: 2;
            }
        }

        /* ===== 流程步骤 ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            counter-reset: step;
        }

        .step-item {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 2rem 1.5rem;
            text-align: center;
            transition: var(--transition);
            position: relative;
            box-shadow: var(--shadow-sm);
        }

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

        .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent);
            color: #fff;
            font-size: 1.25rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.25rem;
            box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
        }

        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--primary);
        }

        .step-item p {
            font-size: 0.9rem;
            color: var(--muted);
            line-height: 1.6;
        }

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

        @media (max-width: 768px) {
            .steps {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 内容卡片（带图片） ===== */
        .content-card {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }

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

        .content-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            background: var(--surface-alt);
        }

        .content-card .card-body {
            padding: 1.5rem;
        }

        .content-card .card-tag {
            display: inline-block;
            background: rgba(59, 130, 246, 0.08);
            color: var(--accent);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.2rem 0.6rem;
            border-radius: 4px;
            margin-bottom: 0.75rem;
        }

        .content-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }

        .content-card p {
            font-size: 0.9rem;
            color: var(--muted);
            line-height: 1.7;
        }

        .content-card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 1.5rem;
            border-top: 1px solid var(--border);
            font-size: 0.85rem;
            color: var(--muted-light);
        }

        /* ===== 统计数据 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }

        .stat-item {
            text-align: center;
            padding: 2rem 1rem;
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .stat-item:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.1;
            margin-bottom: 0.25rem;
        }

        .stat-label {
            font-size: 0.95rem;
            color: var(--muted);
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stat-number {
                font-size: 2rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

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

        .faq-item:hover {
            border-color: var(--accent-light);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.25rem 1.5rem;
            background: none;
            border: none;
            font-size: 1rem;
            font-weight: 600;
            color: var(--primary);
            cursor: pointer;
            text-align: left;
            gap: 1rem;
        }

        .faq-question i {
            color: var(--accent);
            font-size: 0.9rem;
            transition: var(--transition);
            flex-shrink: 0;
        }

        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 1.5rem 1.25rem;
            font-size: 0.95rem;
            color: var(--muted);
            line-height: 1.7;
            display: none;
        }

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

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 5rem 0;
            text-align: center;
            position: relative;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.9) 0%, rgba(15, 23, 42, 0.75) 100%);
            z-index: 1;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            font-size: 2.5rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 1rem;
            letter-spacing: -0.01em;
        }

        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            margin: 0 auto 2rem;
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 3rem 0;
            }
            .cta-section h2 {
                font-size: 1.75rem;
            }
            .cta-section p {
                font-size: 1rem;
            }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.8);
            padding: 4rem 0 2rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 3rem;
            margin-bottom: 3rem;
        }

        .footer h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1.25rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .footer h4 i {
            color: var(--accent-light);
        }

        .footer p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
        }

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

        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 1.5rem;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
            text-align: center;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.5rem;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 0.25rem;
            }
        }

        /* ===== 分隔线 ===== */
        .divider {
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 2px;
            margin: 1rem 0 1.5rem;
        }

        .divider.centered {
            margin: 1rem auto 1.5rem;
        }

        /* ===== 标签云 ===== */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 1rem;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            background: rgba(59, 130, 246, 0.06);
            color: var(--muted);
            font-size: 0.8rem;
            font-weight: 500;
            padding: 0.3rem 0.9rem;
            border-radius: 9999px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .tag:hover {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }

        /* ===== 动画 ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-fade {
            animation: fadeInUp 0.6s ease-out forwards;
        }

        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }