/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0d47a1;
            --primary-dark: #0a3a85;
            --primary-light: #1565c0;
            --accent: #f5a623;
            --accent-dark: #e0951a;
            --accent-light: #fbc555;
            --bg-body: #f0f2f5;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #0a1a2e;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8a8aaa;
            --text-light: #f8f9fa;
            --border: #e2e5ea;
            --border-light: #f0f1f4;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow: 0 6px 24px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
            --shadow-hover: 0 16px 48px rgba(0,0,0,0.12);
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --sidebar-width: 260px;
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-base);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            overflow-x: hidden;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); text-decoration: none; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; padding: 0; margin: 0; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: 2.8rem; }
        h2 { font-size: 2.2rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.2rem; }
        p { margin-bottom: 0.5rem; color: var(--text-secondary); }

        /* ===== 容器 ===== */
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        .container-narrow { max-width: 880px; margin: 0 auto; padding: 0 24px; }
        .section { padding: 80px 0; }
        .section-sm { padding: 48px 0; }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 0.5rem;
            letter-spacing: -0.02em;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 640px;
            margin-bottom: 2.5rem;
        }
        .text-accent { color: var(--accent); }
        .text-primary-custom { color: var(--primary); }

        /* ===== 左侧导航布局 ===== */
        .app-wrapper {
            display: flex;
            min-height: 100vh;
        }
        .sidebar {
            width: var(--sidebar-width);
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            background: var(--bg-dark);
            z-index: 1040;
            display: flex;
            flex-direction: column;
            padding: 32px 20px;
            transition: var(--transition);
            overflow-y: auto;
        }
        .sidebar .logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-light);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
            margin-bottom: 28px;
        }
        .sidebar .logo i {
            font-size: 1.8rem;
            color: var(--accent);
        }
        .sidebar .logo span { color: var(--text-light); }
        .sidebar .logo .accent { color: var(--accent); }
        .sidebar .nav-list { flex: 1; }
        .sidebar .nav-list .nav-item {
            display: block;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255,255,255,0.65);
            font-weight: 500;
            font-size: 0.95rem;
            margin-bottom: 4px;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .sidebar .nav-list .nav-item i { width: 20px; font-size: 1.1rem; }
        .sidebar .nav-list .nav-item:hover {
            background: rgba(255,255,255,0.08);
            color: var(--text-light);
        }
        .sidebar .nav-list .nav-item.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(13,71,161,0.35);
        }
        .sidebar .sidebar-footer {
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 0.8rem;
            color: rgba(255,255,255,0.35);
            text-align: center;
        }
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            background: var(--bg-body);
        }

        /* ===== 移动端导航 ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: var(--bg-dark);
            z-index: 1035;
            padding: 0 20px;
            align-items: center;
            justify-content: space-between;
        }
        .mobile-header .logo {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-header .logo i { color: var(--accent); font-size: 1.5rem; }
        .mobile-header .menu-toggle {
            background: none;
            border: none;
            color: var(--text-light);
            font-size: 1.6rem;
            cursor: pointer;
            padding: 4px 8px;
        }
        .offcanvas-mobile {
            background: var(--bg-dark) !important;
        }
        .offcanvas-mobile .offcanvas-body .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 20px;
            color: rgba(255,255,255,0.7);
            font-weight: 500;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .offcanvas-mobile .offcanvas-body .nav-item:hover,
        .offcanvas-mobile .offcanvas-body .nav-item.active {
            background: rgba(255,255,255,0.08);
            color: #fff;
        }
        .offcanvas-mobile .offcanvas-body .nav-item.active {
            background: var(--primary);
            color: #fff;
        }
        .mobile-header-placeholder { display: none; height: 64px; }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 100px 0 80px;
            background: linear-gradient(135deg, #0a1a2e 0%, #0d47a1 60%, #1565c0 100%);
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }
        .hero .hero-content {
            position: relative;
            z-index: 2;
        }
        .hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(245,166,35,0.18);
            border: 1px solid rgba(245,166,35,0.25);
            color: var(--accent-light);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 900;
            color: #fff;
            letter-spacing: -0.03em;
            line-height: 1.15;
            margin-bottom: 16px;
        }
        .hero h1 .highlight { color: var(--accent); }
        .hero .hero-desc {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.75);
            max-width: 600px;
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .hero .hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
        .hero .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #1a1a2e;
            font-weight: 700;
            padding: 14px 36px;
            border-radius: 50px;
            border: none;
            transition: var(--transition);
            font-size: 1rem;
        }
        .hero .btn-primary-custom:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(245,166,35,0.3);
        }
        .hero .btn-outline-light-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            padding: 14px 32px;
            border-radius: 50px;
            border: 1.5px solid rgba(255,255,255,0.3);
            transition: var(--transition);
            font-size: 1rem;
        }
        .hero .btn-outline-light-custom:hover {
            background: rgba(255,255,255,0.1);
            border-color: rgba(255,255,255,0.6);
            transform: translateY(-2px);
        }
        .hero .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        .hero .hero-stats .stat-item .stat-num {
            font-size: 1.8rem;
            font-weight: 900;
            color: #fff;
        }
        .hero .hero-stats .stat-item .stat-label {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.55);
        }

        /* ===== 板块通用 ===== */
        .section-bg-white { background: #fff; }
        .section-bg-gray { background: var(--bg-body); }
        .section-bg-dark { background: var(--bg-dark); color: #fff; }
        .section-bg-dark .section-title { color: #fff; }
        .section-bg-dark .section-subtitle { color: rgba(255,255,255,0.6); }

        /* ===== 卡片 ===== */
        .card-custom {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            overflow: hidden;
        }
        .card-custom:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: transparent;
        }
        .card-custom .card-body { padding: 28px; }
        .card-custom .card-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: #fff;
            margin-bottom: 18px;
        }
        .card-custom .card-icon.blue { background: var(--primary); }
        .card-custom .card-icon.amber { background: var(--accent); }
        .card-custom .card-icon.teal { background: #00897b; }
        .card-custom .card-icon.purple { background: #7b1fa2; }
        .card-custom .card-icon.coral { background: #e53935; }
        .card-custom .card-icon.green { background: #2e7d32; }

        .card-custom h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; }
        .card-custom p { font-size: 0.95rem; color: var(--text-secondary); }

        /* ===== Feature / 特色网格 ===== */
        .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

        /* ===== 资讯列表 ===== */
        .news-list .news-item {
            display: flex;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .news-list .news-item:last-child { border-bottom: none; }
        .news-list .news-item .news-thumb {
            width: 180px;
            min-height: 120px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--border-light);
        }
        .news-list .news-item .news-info { flex: 1; }
        .news-list .news-item .news-info h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 6px; }
        .news-list .news-item .news-info h3 a { color: var(--text-primary); }
        .news-list .news-item .news-info h3 a:hover { color: var(--primary); }
        .news-list .news-item .news-info .news-meta {
            font-size: 0.85rem;
            color: var(--text-muted);
            display: flex;
            gap: 16px;
            margin-top: 8px;
        }
        .news-list .news-item .news-info .news-meta .tag {
            background: rgba(13,71,161,0.08);
            color: var(--primary);
            padding: 2px 12px;
            border-radius: 20px;
            font-weight: 500;
            font-size: 0.75rem;
        }
        .news-list .news-item .news-info .news-desc {
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-top: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-empty { padding: 40px 0; text-align: center; color: var(--text-muted); }

        /* ===== Stat 数据 ===== */
        .stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .stat-card {
            text-align: center;
            padding: 36px 20px;
            border-radius: var(--radius);
            background: var(--bg-white);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .stat-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
        .stat-card .stat-icon { font-size: 2.2rem; color: var(--primary); margin-bottom: 12px; }
        .stat-card .stat-num { font-size: 2.4rem; font-weight: 900; color: var(--text-primary); }
        .stat-card .stat-label { font-size: 0.9rem; color: var(--text-muted); margin-top: 4px; }

        /* ===== 分类入口 ===== */
        .category-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 28px;
            text-align: center;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .category-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--primary);
        }
        .category-card .cat-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: #fff;
            margin: 0 auto 16px;
        }
        .category-card h3 { font-size: 1.15rem; font-weight: 700; }
        .category-card p { font-size: 0.9rem; color: var(--text-muted); margin-top: 4px; }
        .category-card .btn-cat {
            display: inline-block;
            margin-top: 14px;
            padding: 8px 24px;
            border-radius: 50px;
            background: rgba(13,71,161,0.08);
            color: var(--primary);
            font-weight: 600;
            font-size: 0.85rem;
            transition: var(--transition);
        }
        .category-card:hover .btn-cat { background: var(--primary); color: #fff; }

        /* ===== FAQ ===== */
        .faq-list .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            background: var(--bg-white);
            overflow: hidden;
        }
        .faq-list .faq-item .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: var(--transition);
            background: var(--bg-white);
        }
        .faq-list .faq-item .faq-question:hover { background: var(--border-light); }
        .faq-list .faq-item .faq-question i { color: var(--primary); font-size: 1.1rem; transition: var(--transition); }
        .faq-list .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-list .faq-item .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            display: none;
            line-height: 1.7;
        }
        .faq-list .faq-item.active .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            padding: 72px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.1;
            mix-blend-mode: overlay;
        }
        .cta-section .cta-content { position: relative; z-index: 2; }
        .cta-section h2 { color: #fff; font-size: 2.2rem; font-weight: 800; margin-bottom: 12px; }
        .cta-section p { color: rgba(255,255,255,0.75); font-size: 1.1rem; max-width: 560px; margin: 0 auto 28px; }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: #1a1a2e;
            font-weight: 700;
            padding: 16px 44px;
            border-radius: 50px;
            border: none;
            font-size: 1.05rem;
            transition: var(--transition);
        }
        .cta-section .btn-cta:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(245,166,35,0.3);
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-dark);
            padding: 48px 0 32px;
            color: rgba(255,255,255,0.6);
        }
        .footer .footer-brand { font-size: 1.3rem; font-weight: 800; color: #fff; margin-bottom: 8px; }
        .footer .footer-brand i { color: var(--accent); margin-right: 8px; }
        .footer .footer-desc { font-size: 0.9rem; max-width: 320px; line-height: 1.7; }
        .footer .footer-links { display: flex; flex-wrap: wrap; gap: 16px 32px; }
        .footer .footer-links a { color: rgba(255,255,255,0.55); font-size: 0.9rem; transition: var(--transition); }
        .footer .footer-links a:hover { color: var(--accent); }
        .footer .footer-bottom {
            margin-top: 36px;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.08);
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.35);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1199.98px) {
            .feature-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 991.98px) {
            .sidebar { display: none; }
            .main-content { margin-left: 0; }
            .mobile-header { display: flex; }
            .mobile-header-placeholder { display: block; }
            .hero { padding: 100px 0 60px; }
            .hero h1 { font-size: 2.4rem; }
            .stat-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .feature-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .news-list .news-item { flex-direction: column; }
            .news-list .news-item .news-thumb { width: 100%; height: 180px; }
            .section { padding: 48px 0; }
            .section-title { font-size: 1.6rem; }
            .cta-section h2 { font-size: 1.7rem; }
        }
        @media (max-width: 767.98px) {
            .hero h1 { font-size: 1.8rem; }
            .hero .hero-desc { font-size: 1rem; }
            .hero .hero-stats { gap: 20px; }
            .hero .hero-stats .stat-item .stat-num { font-size: 1.4rem; }
            .feature-grid { grid-template-columns: 1fr; }
            .stat-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
            .stat-card .stat-num { font-size: 1.8rem; }
            .container { padding: 0 16px; }
            .section { padding: 36px 0; }
            .section-title { font-size: 1.4rem; }
            .card-custom .card-body { padding: 20px; }
            .footer .footer-links { gap: 12px 20px; }
            .cta-section { padding: 48px 0; }
            .cta-section h2 { font-size: 1.4rem; }
            .cta-section .btn-cta { padding: 14px 32px; font-size: 0.95rem; }
        }
        @media (max-width: 480px) {
            .hero h1 { font-size: 1.5rem; }
            .hero .hero-actions { flex-direction: column; }
            .hero .btn-primary-custom, .hero .btn-outline-light-custom { width: 100%; justify-content: center; }
            .stat-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
            .stat-card { padding: 20px 12px; }
            .stat-card .stat-num { font-size: 1.5rem; }
            .news-list .news-item .news-thumb { height: 140px; }
        }

        /* ===== 工具类 ===== */
        .gap-2 { gap: 0.5rem; }
        .gap-3 { gap: 1rem; }
        .gap-4 { gap: 1.5rem; }
        .mt-2 { margin-top: 0.5rem; }
        .mt-3 { margin-top: 1rem; }
        .mt-4 { margin-top: 1.5rem; }
        .mt-5 { margin-top: 2.5rem; }
        .mb-2 { margin-bottom: 0.5rem; }
        .mb-3 { margin-bottom: 1rem; }
        .mb-4 { margin-bottom: 1.5rem; }
        .mb-5 { margin-bottom: 2.5rem; }
        .text-center { text-align: center; }
        .fw-700 { font-weight: 700; }
        .d-flex { display: flex; }
        .flex-wrap { flex-wrap: wrap; }
        .align-items-center { align-items: center; }
        .justify-content-center { justify-content: center; }

/* roulang page: article */
:root {
        --primary: #0a1f3e;
        --primary-light: #132f5a;
        --accent: #c9a84c;
        --accent-hover: #dbb95a;
        --accent-light: rgba(201, 168, 76, 0.12);
        --bg-body: #f5f6f8;
        --bg-card: #ffffff;
        --bg-sidebar: #0a1f3e;
        --text-dark: #1a1a2e;
        --text-body: #3d4050;
        --text-muted: #7a7f8a;
        --text-light: rgba(255,255,255,0.85);
        --border-color: #e8eaed;
        --radius-sm: 8px;
        --radius-md: 14px;
        --radius-lg: 20px;
        --shadow-sm: 0 2px 8px rgba(10,31,62,0.06);
        --shadow-md: 0 6px 24px rgba(10,31,62,0.10);
        --shadow-lg: 0 12px 40px rgba(10,31,62,0.14);
        --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        --sidebar-width: 240px;
        --header-height: 0px;
        --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
        font-family: var(--font-base);
        background: var(--bg-body);
        color: var(--text-body);
        line-height: 1.7;
        -webkit-font-smoothing: antialiased;
        display: flex;
        min-height: 100vh;
    }
    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--accent); }
    img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
    .container { max-width: 1200px; padding: 0 24px; margin: 0 auto; width: 100%; }

    /* ===== Sidebar ===== */
    .sidebar {
        position: fixed;
        top: 0; left: 0;
        width: var(--sidebar-width);
        height: 100vh;
        background: var(--bg-sidebar);
        z-index: 1050;
        display: flex;
        flex-direction: column;
        padding: 28px 18px 24px;
        transition: var(--transition);
        border-right: 1px solid rgba(255,255,255,0.06);
        overflow-y: auto;
    }
    .sidebar-brand {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 1.35rem;
        font-weight: 800;
        color: #fff;
        padding: 0 6px 24px;
        border-bottom: 1px solid rgba(255,255,255,0.08);
        margin-bottom: 18px;
        letter-spacing: -0.3px;
    }
    .sidebar-brand i { color: var(--accent); font-size: 1.5rem; }
    .nav-list { display: flex; flex-direction: column; gap: 4px; }
    .nav-item {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 10px 14px;
        border-radius: var(--radius-sm);
        color: rgba(255,255,255,0.6);
        font-weight: 500;
        font-size: 0.92rem;
        transition: var(--transition);
    }
    .nav-item i { width: 20px; text-align: center; font-size: 1rem; }
    .nav-item:hover { background: rgba(255,255,255,0.08); color: #fff; }
    .nav-item.active { background: var(--accent); color: var(--primary); font-weight: 600; }

    /* ===== Main Content ===== */
    .main-wrapper {
        margin-left: var(--sidebar-width);
        flex: 1;
        display: flex;
        flex-direction: column;
        min-height: 100vh;
    }
    .main-content { flex: 1; padding: 40px 0 60px; }

    /* ===== Article Hero ===== */
    .article-hero {
        position: relative;
        padding: 60px 0 50px;
        background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
        border-radius: 0 0 var(--radius-lg) var(--radius-lg);
        margin: 0 24px 40px;
        overflow: hidden;
    }
    .article-hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
        opacity: 0.12;
        pointer-events: none;
    }
    .article-hero .hero-inner {
        position: relative;
        z-index: 1;
        max-width: 860px;
        margin: 0 auto;
        padding: 0 28px;
    }
    .article-hero .breadcrumb-custom {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 0.85rem;
        color: rgba(255,255,255,0.5);
        margin-bottom: 20px;
    }
    .article-hero .breadcrumb-custom a { color: rgba(255,255,255,0.6); }
    .article-hero .breadcrumb-custom a:hover { color: var(--accent); }
    .article-hero .breadcrumb-custom .sep { color: rgba(255,255,255,0.3); }
    .article-hero .category-badge {
        display: inline-block;
        background: var(--accent);
        color: var(--primary);
        font-size: 0.78rem;
        font-weight: 700;
        padding: 4px 14px;
        border-radius: 20px;
        text-transform: uppercase;
        letter-spacing: 0.5px;
        margin-bottom: 14px;
    }
    .article-hero h1 {
        font-size: 2.2rem;
        font-weight: 800;
        color: #fff;
        line-height: 1.3;
        margin: 0 0 16px;
        letter-spacing: -0.5px;
    }
    .article-hero .meta-bar {
        display: flex;
        flex-wrap: wrap;
        gap: 18px;
        font-size: 0.85rem;
        color: rgba(255,255,255,0.55);
    }
    .article-hero .meta-bar span { display: flex; align-items: center; gap: 6px; }
    .article-hero .meta-bar i { font-size: 0.8rem; }

    /* ===== Article Body ===== */
    .article-body-wrap {
        max-width: 860px;
        margin: 0 auto;
        padding: 0 24px;
    }
    .article-cover {
        border-radius: var(--radius-md);
        overflow: hidden;
        margin-bottom: 36px;
        box-shadow: var(--shadow-md);
    }
    .article-cover img { width: 100%; height: auto; aspect-ratio: 16/9; object-fit: cover; }
    .article-content {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        padding: 40px 44px;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border-color);
    }
    .article-content p { margin-bottom: 1.4em; font-size: 1.02rem; line-height: 1.8; color: var(--text-body); }
    .article-content h2, .article-content h3 { color: var(--primary); font-weight: 700; margin-top: 1.6em; margin-bottom: 0.6em; }
    .article-content ul, .article-content ol { padding-left: 1.5em; margin-bottom: 1.4em; }
    .article-content li { margin-bottom: 0.4em; }
    .article-content a { color: var(--accent); font-weight: 500; text-decoration: underline; }
    .article-content a:hover { color: var(--accent-hover); }
    .article-content img { border-radius: var(--radius-sm); margin: 1.2em 0; }
    .article-content blockquote {
        border-left: 4px solid var(--accent);
        padding: 12px 20px;
        background: var(--accent-light);
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        margin: 1.4em 0;
        color: var(--text-dark);
        font-style: italic;
    }

    /* ===== Article Footer ===== */
    .article-footer-bar {
        max-width: 860px;
        margin: 32px auto 0;
        padding: 0 24px;
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        align-items: center;
        gap: 16px;
    }
    .article-tags { display: flex; flex-wrap: wrap; gap: 8px; }
    .article-tags .tag {
        display: inline-block;
        background: var(--accent-light);
        color: var(--primary);
        font-size: 0.78rem;
        font-weight: 600;
        padding: 4px 14px;
        border-radius: 20px;
        border: 1px solid rgba(201,168,76,0.2);
    }
    .article-share { display: flex; align-items: center; gap: 10px; font-size: 0.85rem; color: var(--text-muted); }
    .article-share a { color: var(--text-muted); font-size: 1.1rem; }
    .article-share a:hover { color: var(--accent); transform: translateY(-2px); }

    /* ===== Related Posts ===== */
    .related-section { margin-top: 56px; }
    .related-section h3 {
        font-size: 1.3rem;
        font-weight: 700;
        color: var(--primary);
        margin-bottom: 24px;
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .related-section h3 i { color: var(--accent); }
    .related-grid { display: grid; gap: 20px; }

    /* ===== FAQ & CTA ===== */
    .faq-cta-wrap {
        max-width: 860px;
        margin: 56px auto 0;
        padding: 0 24px;
    }
    .faq-block {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        padding: 32px 36px;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border-color);
        margin-bottom: 28px;
    }
    .faq-block h4 {
        font-size: 1.1rem;
        font-weight: 700;
        color: var(--primary);
        margin-bottom: 18px;
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .faq-block h4 i { color: var(--accent); }
    .faq-item { border-bottom: 1px solid var(--border-color); padding: 14px 0; }
    .faq-item:last-child { border-bottom: none; }
    .faq-q { font-weight: 600; color: var(--text-dark); margin-bottom: 4px; font-size: 0.95rem; cursor: default; }
    .faq-a { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; }

    .cta-card {
        background: linear-gradient(135deg, var(--primary), var(--primary-light));
        border-radius: var(--radius-lg);
        padding: 40px 44px;
        text-align: center;
        position: relative;
        overflow: hidden;
    }
    .cta-card::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
        opacity: 0.08;
        pointer-events: none;
    }
    .cta-card h4 { color: #fff; font-size: 1.3rem; font-weight: 700; margin-bottom: 8px; position: relative; z-index:1; }
    .cta-card p { color: rgba(255,255,255,0.6); font-size: 0.92rem; margin-bottom: 20px; position: relative; z-index:1; }
    .cta-card .btn-cta {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: var(--accent);
        color: var(--primary);
        font-weight: 700;
        padding: 12px 32px;
        border-radius: 30px;
        border: none;
        font-size: 0.95rem;
        transition: var(--transition);
        position: relative; z-index:1;
    }
    .cta-card .btn-cta:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(201,168,76,0.35); }

    /* ===== Not Found ===== */
    .not-found-box {
        text-align: center;
        padding: 60px 24px;
        background: var(--bg-card);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border-color);
    }
    .not-found-box i { font-size: 3rem; color: var(--text-muted); margin-bottom: 16px; display: block; }
    .not-found-box h2 { font-size: 1.5rem; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
    .not-found-box p { color: var(--text-muted); margin-bottom: 20px; }
    .not-found-box .btn-back {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: var(--primary);
        color: #fff;
        padding: 10px 28px;
        border-radius: 30px;
        font-weight: 600;
        font-size: 0.9rem;
        transition: var(--transition);
    }
    .not-found-box .btn-back:hover { background: var(--primary-light); transform: translateY(-2px); }

    /* ===== Footer ===== */
    .footer {
        background: var(--primary);
        padding: 48px 0 20px;
        margin-top: 60px;
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    }
    .footer .footer-brand { color: #fff; font-size: 1.25rem; font-weight: 800; display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
    .footer .footer-brand i { color: var(--accent); }
    .footer .footer-desc { color: rgba(255,255,255,0.45); font-size: 0.88rem; max-width: 380px; line-height: 1.7; }
    .footer .footer-links { display: flex; flex-wrap: wrap; gap: 10px; }
    .footer .footer-links a { color: rgba(255,255,255,0.45); font-size: 0.88rem; }
    .footer .footer-links a:hover { color: var(--accent); }
    .footer .footer-bottom {
        margin-top: 32px;
        padding-top: 18px;
        border-top: 1px solid rgba(255,255,255,0.06);
        font-size: 0.82rem;
        color: rgba(255,255,255,0.3);
        text-align: center;
    }

    /* ===== Mobile Toggle ===== */
    .mobile-toggle {
        display: none;
        position: fixed;
        top: 14px; left: 14px;
        z-index: 1060;
        background: var(--primary);
        color: #fff;
        border: none;
        width: 42px; height: 42px;
        border-radius: var(--radius-sm);
        font-size: 1.2rem;
        cursor: pointer;
        box-shadow: var(--shadow-md);
        transition: var(--transition);
        align-items: center;
        justify-content: center;
    }
    .mobile-toggle:hover { background: var(--primary-light); }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        .article-hero h1 { font-size: 1.8rem; }
        .article-content { padding: 28px 24px; }
    }
    @media (max-width: 768px) {
        .mobile-toggle { display: flex; }
        .sidebar {
            transform: translateX(-100%);
            width: 260px;
            padding: 20px 16px;
        }
        .sidebar.open { transform: translateX(0); }
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.45);
            z-index: 1045;
        }
        .sidebar-overlay.show { display: block; }
        .main-wrapper { margin-left: 0; }
        .article-hero { margin: 0 12px 28px; padding: 40px 0 36px; }
        .article-hero h1 { font-size: 1.5rem; }
        .article-body-wrap { padding: 0 12px; }
        .article-content { padding: 20px 16px; }
        .article-footer-bar { flex-direction: column; align-items: flex-start; }
        .related-grid { grid-template-columns: 1fr; }
        .faq-block { padding: 20px 16px; }
        .cta-card { padding: 28px 20px; }
        .footer { padding: 32px 12px 16px; }
        .footer .footer-brand { font-size: 1.1rem; }
    }
    @media (max-width: 520px) {
        .article-hero h1 { font-size: 1.25rem; }
        .article-hero .meta-bar { gap: 10px; font-size: 0.78rem; }
        .article-content { padding: 16px 12px; font-size: 0.95rem; }
        .cta-card h4 { font-size: 1.05rem; }
        .cta-card .btn-cta { padding: 10px 22px; font-size: 0.85rem; }
        .faq-block h4 { font-size: 1rem; }
    }
    @media (min-width: 769px) {
        .sidebar { transform: translateX(0); }
        .sidebar-overlay { display: none !important; }
    }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0b5e7c;
            --primary-light: #1a7f9e;
            --primary-dark: #083b4f;
            --secondary: #f5b042;
            --secondary-light: #f8c46a;
            --accent: #e85d3a;
            --bg-body: #f4f7fa;
            --bg-card: #ffffff;
            --bg-dark: #0a2a36;
            --text-primary: #1a2a3a;
            --text-secondary: #4a5a6a;
            --text-muted: #7a8a9a;
            --text-light: #f0f4f8;
            --border-color: #e2e8f0;
            --border-light: rgba(255, 255, 255, 0.15);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 20px 48px rgba(0, 0, 0, 0.12);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --nav-width: 220px;
            --header-h: 0px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== 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-sans);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 1rem;
        }

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

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

        /* ===== 左侧导航布局 ===== */
        .app-wrapper {
            display: flex;
            min-height: 100vh;
        }

        .sidebar {
            width: var(--nav-width);
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            background: var(--bg-dark);
            color: var(--text-light);
            display: flex;
            flex-direction: column;
            z-index: 1050;
            transition: transform var(--transition);
            box-shadow: 2px 0 20px rgba(0, 0, 0, 0.15);
            overflow-y: auto;
        }

        .sidebar-brand {
            padding: 28px 20px 18px;
            border-bottom: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.3px;
        }
        .sidebar-brand i {
            font-size: 1.6rem;
            color: var(--secondary);
        }
        .sidebar-brand span {
            background: linear-gradient(135deg, #fff 60%, var(--secondary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-list {
            display: flex;
            flex-direction: column;
            padding: 16px 12px;
            gap: 2px;
        }

        .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.65);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            position: relative;
        }
        .nav-item i {
            width: 20px;
            text-align: center;
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.4);
            transition: color var(--transition);
        }
        .nav-item:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }
        .nav-item:hover i {
            color: var(--secondary);
        }
        .nav-item.active {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--secondary);
        }
        .nav-item.active i {
            color: var(--secondary);
        }
        .nav-item:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
        }

        /* ===== 右侧内容区 ===== */
        .main-content {
            margin-left: var(--nav-width);
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
        }

        /* ===== 移动端顶部导航 ===== */
        .mobile-topbar {
            display: none;
            background: var(--bg-dark);
            padding: 12px 20px;
            align-items: center;
            justify-content: space-between;
            position: sticky;
            top: 0;
            z-index: 1040;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.12);
        }
        .mobile-topbar .brand {
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-topbar .brand i {
            color: var(--secondary);
            font-size: 1.3rem;
        }
        .mobile-topbar .menu-toggle {
            background: none;
            border: none;
            color: #fff;
            font-size: 1.5rem;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: background var(--transition);
        }
        .mobile-topbar .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .mobile-topbar .menu-toggle:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
        }

        /* ===== 遮罩 ===== */
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: 1045;
            opacity: 0;
            transition: opacity var(--transition);
        }
        .sidebar-overlay.show {
            opacity: 1;
        }

        /* ===== 通用容器 ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Banner ===== */
        .page-banner {
            position: relative;
            padding: 80px 0 72px;
            background: var(--bg-dark) url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            color: #fff;
            overflow: hidden;
            isolation: isolate;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 42, 54, 0.88) 30%, rgba(10, 42, 54, 0.50) 100%);
            z-index: 0;
        }
        .page-banner .container {
            position: relative;
            z-index: 1;
        }
        .page-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            line-height: 1.2;
            margin-bottom: 16px;
            max-width: 720px;
        }
        .page-banner h1 i {
            color: var(--secondary);
        }
        .page-banner p {
            font-size: 1.15rem;
            opacity: 0.9;
            max-width: 620px;
            line-height: 1.7;
            margin-bottom: 8px;
        }
        .page-banner .breadcrumb {
            background: transparent;
            padding: 0;
            margin-bottom: 20px;
            font-size: 0.9rem;
        }
        .page-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
            transition: color var(--transition);
        }
        .page-banner .breadcrumb a:hover {
            color: var(--secondary);
        }
        .page-banner .breadcrumb .active {
            color: #fff;
        }
        .page-banner .breadcrumb-item + .breadcrumb-item::before {
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: #fff;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.3px;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin-bottom: 40px;
            line-height: 1.7;
        }
        .text-center .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 卡片通用 ===== */
        .card {
            border: none;
            border-radius: var(--radius-md);
            background: var(--bg-card);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .card-body {
            padding: 28px 24px;
        }
        .card-img-top {
            border-radius: var(--radius-md) var(--radius-md) 0 0;
            object-fit: cover;
            height: 200px;
            width: 100%;
        }

        /* ===== 步骤卡 ===== */
        .step-card {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            background: #fff;
            padding: 28px 24px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border-left: 4px solid var(--primary);
        }
        .step-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(4px);
        }
        .step-number {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.25rem;
        }
        .step-content h5 {
            font-weight: 600;
            font-size: 1.1rem;
            margin-bottom: 6px;
            color: var(--text-primary);
        }
        .step-content p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* ===== 功能卡片 ===== */
        .feature-card {
            text-align: center;
            padding: 32px 20px 28px;
            border-radius: var(--radius-md);
            background: #fff;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            height: 100%;
        }
        .feature-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-6px);
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 18px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            transition: transform var(--transition);
        }
        .feature-card:hover .feature-icon {
            transform: scale(1.08);
        }
        .feature-card h5 {
            font-weight: 600;
            font-size: 1.05rem;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .feature-card p {
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ===== 技巧列表 ===== */
        .tip-list {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .tip-list li {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            background: #fff;
            padding: 20px 22px;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition);
        }
        .tip-list li:hover {
            box-shadow: var(--shadow-md);
        }
        .tip-list li i {
            color: var(--secondary);
            font-size: 1.2rem;
            margin-top: 2px;
            flex-shrink: 0;
        }
        .tip-list li div {
            flex: 1;
        }
        .tip-list li strong {
            display: block;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 2px;
        }
        .tip-list li span {
            color: var(--text-secondary);
            font-size: 0.92rem;
        }

        /* ===== FAQ ===== */
        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            background: #fff;
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 18px 22px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: #fff;
            border: none;
            width: 100%;
            text-align: left;
            font-size: 1rem;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: #f8fafc;
        }
        .faq-question:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: -2px;
        }
        .faq-question i {
            transition: transform var(--transition);
            color: var(--primary);
            font-size: 0.85rem;
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 22px 18px;
            color: var(--text-secondary);
            line-height: 1.7;
            font-size: 0.95rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark) url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            color: #fff;
            padding: 80px 0;
            text-align: center;
            position: relative;
            isolation: isolate;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 42, 54, 0.85) 30%, rgba(10, 42, 54, 0.55) 100%);
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.1rem;
            opacity: 0.9;
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 50px;
            background: var(--secondary);
            color: #1a2a3a;
            font-weight: 700;
            font-size: 1.05rem;
            border: none;
            transition: all var(--transition);
            cursor: pointer;
            box-shadow: 0 4px 16px rgba(245, 176, 66, 0.35);
        }
        .btn-cta:hover {
            background: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(245, 176, 66, 0.45);
            color: #1a2a3a;
        }
        .btn-cta:focus-visible {
            outline: 2px solid #fff;
            outline-offset: 4px;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 48px 0 28px;
            font-size: 0.92rem;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand i {
            color: var(--secondary);
            font-size: 1.5rem;
        }
        .footer-desc {
            max-width: 380px;
            line-height: 1.7;
            opacity: 0.8;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 6px 20px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition);
            font-size: 0.92rem;
        }
        .footer-links a:hover {
            color: var(--secondary);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-light);
            margin-top: 28px;
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            opacity: 0.6;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991.98px) {
            :root {
                --nav-width: 0px;
            }
            .sidebar {
                transform: translateX(-100%);
                width: 260px;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .main-content {
                margin-left: 0;
            }
            .mobile-topbar {
                display: flex;
            }
            .sidebar-overlay.show {
                display: block;
            }
            .page-banner {
                padding: 60px 0 52px;
            }
            .page-banner h1 {
                font-size: 2rem;
            }
            .section {
                padding: 52px 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 767.98px) {
            .container {
                padding: 0 16px;
            }
            .page-banner h1 {
                font-size: 1.7rem;
            }
            .page-banner p {
                font-size: 1rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .step-card {
                flex-direction: column;
                padding: 20px 18px;
            }
            .step-number {
                width: 40px;
                height: 40px;
                font-size: 1rem;
            }
            .feature-card {
                padding: 24px 16px 20px;
            }
            .feature-icon {
                width: 52px;
                height: 52px;
                font-size: 1.3rem;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 1rem;
            }
            .btn-cta {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 16px 14px;
                font-size: 0.9rem;
            }
            .tip-list li {
                padding: 16px 16px;
            }
            .footer {
                padding: 36px 0 20px;
            }
        }

        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 1.4rem;
            }
            .section {
                padding: 40px 0;
            }
            .section-title {
                font-size: 1.2rem;
            }
            .section-subtitle {
                font-size: 0.92rem;
                margin-bottom: 28px;
            }
            .card-body {
                padding: 20px 16px;
            }
            .step-card {
                padding: 16px 14px;
            }
            .feature-card {
                padding: 20px 12px 16px;
            }
            .feature-icon {
                width: 44px;
                height: 44px;
                font-size: 1.1rem;
                margin-bottom: 12px;
            }
            .footer-brand {
                font-size: 1.1rem;
            }
        }

        /* ===== 工具类 ===== */
        .gap-2 {
            gap: 0.5rem;
        }
        .gap-3 {
            gap: 1rem;
        }
        .gap-4 {
            gap: 1.5rem;
        }
        .mt-2 {
            margin-top: 0.5rem;
        }
        .mt-3 {
            margin-top: 1rem;
        }
        .mt-4 {
            margin-top: 1.5rem;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .mb-2 {
            margin-bottom: 0.5rem;
        }
        .mb-3 {
            margin-bottom: 1rem;
        }
        .mb-4 {
            margin-bottom: 1.5rem;
        }
        .text-center {
            text-align: center;
        }
        .fw-600 {
            font-weight: 600;
        }
        .rounded-pill {
            border-radius: 50px;
        }