/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f1e3a;
            --primary-light: #1a2f54;
            --primary-dark: #0a1428;
            --accent: #d4a84b;
            --accent-light: #e8c46a;
            --accent-dark: #b8912e;
            --bg-body: #f5f6f8;
            --bg-card: #ffffff;
            --bg-dark: #0f1e3a;
            --bg-section-alt: #eef0f4;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8a8aaa;
            --text-light: #f0f0f5;
            --border-color: #e0e2e8;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(15, 30, 58, 0.06);
            --shadow-md: 0 6px 24px rgba(15, 30, 58, 0.10);
            --shadow-lg: 0 12px 40px rgba(15, 30, 58, 0.14);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --nav-width: 240px;
            --header-height: 0px;
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--text-primary); }
        h1 { font-size: 2.6rem; }
        h2 { font-size: 2rem; margin-bottom: 1.2rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 0.8rem; color: var(--text-secondary); }

        /* ===== 容器 ===== */
        .app-wrapper {
            display: flex;
            min-height: 100vh;
        }

        /* ===== 左侧竖向导航 ===== */
        .sidebar-nav {
            width: var(--nav-width);
            background: var(--primary);
            color: var(--text-light);
            position: fixed;
            top: 0;
            left: 0;
            height: 100vh;
            z-index: 1000;
            display: flex;
            flex-direction: column;
            transition: transform var(--transition);
            box-shadow: 2px 0 20px rgba(0,0,0,0.15);
        }
        .sidebar-brand {
            padding: 28px 20px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .sidebar-brand .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--accent);
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-brand .logo i {
            font-size: 1.8rem;
            color: var(--accent);
        }
        .sidebar-brand .logo-sub {
            font-size: 0.72rem;
            color: rgba(255,255,255,0.45);
            margin-top: 4px;
            letter-spacing: 2px;
        }
        .sidebar-menu {
            flex: 1;
            padding: 20px 0;
            overflow-y: auto;
        }
        .sidebar-menu .menu-label {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: rgba(255,255,255,0.3);
            padding: 12px 24px 6px;
            font-weight: 600;
        }
        .sidebar-menu a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 24px;
            color: rgba(255,255,255,0.7);
            font-size: 0.95rem;
            font-weight: 500;
            transition: all var(--transition);
            border-left: 3px solid transparent;
        }
        .sidebar-menu a i {
            width: 20px;
            text-align: center;
            font-size: 1rem;
        }
        .sidebar-menu a:hover {
            color: #fff;
            background: rgba(255,255,255,0.06);
            border-left-color: var(--accent);
        }
        .sidebar-menu a.active {
            color: var(--accent);
            background: rgba(212, 168, 75, 0.10);
            border-left-color: var(--accent);
            font-weight: 600;
        }
        .sidebar-footer {
            padding: 16px 24px;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 0.7rem;
            color: rgba(255,255,255,0.3);
            text-align: center;
        }

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

        /* ===== 移动端顶部导航 ===== */
        .mobile-topbar {
            display: none;
            background: var(--primary);
            padding: 14px 20px;
            align-items: center;
            justify-content: space-between;
            position: sticky;
            top: 0;
            z-index: 999;
            box-shadow: 0 2px 12px rgba(0,0,0,0.15);
        }
        .mobile-topbar .logo {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--accent);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-topbar .logo i { font-size: 1.4rem; }
        .mobile-toggle {
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background var(--transition);
        }
        .mobile-toggle:hover { background: rgba(255,255,255,0.10); }
        .mobile-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

        /* ===== Sidebar 遮罩 ===== */
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.4);
            z-index: 999;
            opacity: 0;
            transition: opacity var(--transition);
            pointer-events: none;
        }
        .sidebar-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 40px;
        }
        .section-alt { background: var(--bg-section-alt); }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-light);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark .section-subtitle { color: #fff; }
        .section-dark p { color: rgba(255,255,255,0.7); }
        .section-title {
            text-align: center;
            margin-bottom: 0.5rem;
        }
        .section-subtitle {
            text-align: center;
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto 3rem;
        }
        .section-dark .section-subtitle { color: rgba(255,255,255,0.55); }

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

        /* ===== Hero 首屏 ===== */
        .hero {
            padding: 100px 40px 80px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 60%, #1f3a5f 100%);
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
            opacity: 0.4;
        }
        .hero .container {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            gap: 50px;
        }
        .hero-text { flex: 1; }
        .hero-text h1 {
            font-size: 3rem;
            color: #fff;
            margin-bottom: 0.6rem;
            line-height: 1.2;
        }
        .hero-text h1 span { color: var(--accent); }
        .hero-text .hero-desc {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.75);
            margin-bottom: 2rem;
            max-width: 520px;
        }
        .hero-text .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 2rem;
        }
        .hero-text .hero-badges .badge {
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(4px);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.85);
            border: 1px solid rgba(255,255,255,0.10);
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .hero-visual {
            flex: 0 0 340px;
            height: 280px;
            background: rgba(255,255,255,0.05);
            border-radius: var(--radius-lg);
            border: 1px solid rgba(255,255,255,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            backdrop-filter: blur(8px);
            position: relative;
            overflow: hidden;
        }
        .hero-visual .visual-icon {
            font-size: 5rem;
            color: var(--accent);
            opacity: 0.6;
        }
        .hero-visual .visual-ring {
            position: absolute;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            border: 2px solid rgba(212,168,75,0.15);
            animation: pulse-ring 4s ease-in-out infinite;
        }
        .hero-visual .visual-ring:nth-child(2) {
            width: 260px;
            height: 260px;
            animation-delay: 1.5s;
        }
        @keyframes pulse-ring {
            0%, 100% { transform: scale(0.95); opacity: 0.3; }
            50% { transform: scale(1.05); opacity: 0.6; }
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 30px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            line-height: 1.4;
        }
        .btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
        .btn-primary {
            background: var(--accent);
            color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(212,168,75,0.30);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255,255,255,0.25);
        }
        .btn-outline-light:hover {
            background: rgba(255,255,255,0.08);
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }
        .btn-accent-outline {
            background: transparent;
            color: var(--accent);
            border: 2px solid var(--accent);
        }
        .btn-accent-outline:hover {
            background: var(--accent);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(212,168,75,0.25);
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 28px 24px;
            transition: all var(--transition);
            border: 1px solid var(--border-color);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .card .card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: rgba(212,168,75,0.10);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--accent);
            margin-bottom: 16px;
        }
        .card h3 { font-size: 1.15rem; margin-bottom: 8px; }
        .card p { font-size: 0.92rem; color: var(--text-muted); margin-bottom: 0; }
        .card .card-tag {
            display: inline-block;
            padding: 2px 12px;
            background: rgba(212,168,75,0.10);
            color: var(--accent-dark);
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 10px;
        }

        /* ===== 网格 ===== */
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
        .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

        /* ===== 资讯列表卡片 ===== */
        .post-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 24px 24px 20px;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .post-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .post-card .post-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-bottom: 8px;
        }
        .post-card .post-meta .cat {
            background: var(--accent);
            color: var(--primary);
            padding: 1px 12px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.7rem;
        }
        .post-card h3 { font-size: 1.08rem; margin-bottom: 6px; }
        .post-card h3 a { color: var(--text-primary); }
        .post-card h3 a:hover { color: var(--accent); }
        .post-card p { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 0; flex: 1; }
        .post-card .post-readmore {
            margin-top: 14px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-dark);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* ===== 流程步骤 ===== */
        .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
        .step-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            position: relative;
            transition: all var(--transition);
        }
        .step-item:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 32px;
            height: 32px;
            background: var(--accent);
            color: var(--primary);
            font-weight: 800;
            font-size: 0.9rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(212,168,75,0.25);
        }
        .step-item .step-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 12px;
            margin-top: 4px;
        }
        .step-item h4 { font-size: 1rem; margin-bottom: 6px; }
        .step-item p { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 0; }

        /* ===== 数据统计 ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .stat-item {
            text-align: center;
            padding: 20px 12px;
            background: rgba(255,255,255,0.04);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255,255,255,0.06);
        }
        .stat-item .stat-num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.1;
        }
        .stat-item .stat-label {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.6);
            margin-top: 6px;
        }

        /* ===== FAQ ===== */
        .faq-list { max-width: 780px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--accent); }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            color: var(--text-primary);
            transition: background var(--transition);
        }
        .faq-question:hover { background: rgba(212,168,75,0.04); }
        .faq-question:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
        .faq-question i { color: var(--accent); transition: transform var(--transition); font-size: 0.9rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-box {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            border-radius: var(--radius-lg);
            padding: 60px 50px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-box h2 { color: #fff; margin-bottom: 0.6rem; }
        .cta-box p { color: rgba(255,255,255,0.7); max-width: 560px; margin: 0 auto 2rem; font-size: 1.05rem; }
        .cta-box .cta-bg-icon {
            position: absolute;
            font-size: 12rem;
            color: rgba(255,255,255,0.03);
            bottom: -30px;
            right: -20px;
            line-height: 1;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.6);
            padding: 48px 40px 30px;
        }
        .footer-inner {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
        }
        .footer-inner h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 16px;
        }
        .footer-inner p, .footer-inner a {
            font-size: 0.88rem;
            color: rgba(255,255,255,0.5);
        }
        .footer-inner a:hover { color: var(--accent); }
        .footer-inner .footer-logo {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--accent);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 10px;
        }
        .footer-inner .footer-logo i { font-size: 1.4rem; }
        .footer-inner ul li { margin-bottom: 8px; }
        .footer-bottom {
            max-width: 1200px;
            margin: 32px auto 0;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.06);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.78rem;
            color: rgba(255,255,255,0.3);
        }

        /* ===== 标签 ===== */
        .tag {
            display: inline-block;
            padding: 3px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(212,168,75,0.10);
            color: var(--accent-dark);
            transition: all var(--transition);
        }
        .tag:hover { background: var(--accent); color: var(--primary); }

        /* ===== 文章详情页特殊样式 ===== */
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 40px 36px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            max-width: 860px;
            margin: 0 auto;
        }
        .article-body h1 { font-size: 2rem; margin-bottom: 0.8rem; }
        .article-body .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 28px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border-color);
        }
        .article-body .article-content {
            font-size: 1.02rem;
            line-height: 1.9;
            color: var(--text-secondary);
        }
        .article-body .article-content p { margin-bottom: 1.2rem; }
        .article-body .article-content img { border-radius: var(--radius-sm); margin: 1.5rem 0; }

        /* ===== 分类页头部 ===== */
        .category-header {
            background: var(--primary);
            padding: 60px 40px 50px;
            color: #fff;
        }
        .category-header h1 { color: #fff; font-size: 2.2rem; }
        .category-header p { color: rgba(255,255,255,0.65); max-width: 600px; }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
            .steps { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-inner { grid-template-columns: 1fr 1fr; }
            .hero .container { flex-direction: column; }
            .hero-visual { flex: 0 0 auto; width: 100%; max-width: 400px; height: 220px; }
            .hero-text h1 { font-size: 2.4rem; }
        }

        @media (max-width: 768px) {
            .sidebar-nav { transform: translateX(-100%); }
            .sidebar-nav.open { transform: translateX(0); }
            .mobile-topbar { display: flex; }
            .sidebar-overlay.open { display: block; }
            .main-content { margin-left: 0; }
            .section { padding: 50px 20px; }
            .hero { padding: 60px 20px 50px; }
            .hero-text h1 { font-size: 1.8rem; }
            .hero-text .hero-desc { font-size: 1rem; }
            .grid-3 { grid-template-columns: 1fr; }
            .grid-2 { grid-template-columns: 1fr; }
            .grid-4 { grid-template-columns: 1fr; }
            .steps { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-inner { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-box { padding: 40px 24px; }
            .article-body { padding: 24px 18px; }
            .article-body h1 { font-size: 1.5rem; }
            .category-header { padding: 40px 20px 30px; }
            .category-header h1 { font-size: 1.6rem; }
            .post-card { padding: 18px; }
            .card { padding: 20px 16px; }
            .section-title { font-size: 1.6rem; }
            .hero-visual { height: 180px; }
        }

        @media (max-width: 520px) {
            .hero-text h1 { font-size: 1.5rem; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .stat-item .stat-num { font-size: 2rem; }
            .btn { padding: 10px 22px; font-size: 0.88rem; }
            .hero-actions { flex-direction: column; }
            .hero .hero-badges { gap: 6px; }
            .hero .hero-badges .badge { font-size: 0.72rem; padding: 4px 12px; }
        }

        /* ===== 辅助 ===== */
        .text-center { text-align: center; }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .gap-1 { gap: 1rem; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .empty-state {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        .empty-state i { font-size: 2.4rem; color: var(--border-color); margin-bottom: 12px; display: block; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2d5f8a;
            --primary-dark: #0f2440;
            --accent: #e8b830;
            --accent-light: #f0d060;
            --accent-dark: #c89a20;
            --bg-body: #f5f7fa;
            --bg-card: #ffffff;
            --bg-dark: #0f1a2e;
            --bg-sidebar: #0f1a2e;
            --text-primary: #1a2a3a;
            --text-secondary: #4a5a6a;
            --text-light: #8899aa;
            --text-white: #f0f4f8;
            --text-sidebar: #c0c8d4;
            --border: #e2e6ee;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 18px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-sidebar: 2px 0 30px rgba(0, 0, 0, 0.3);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --sidebar-width: 240px;
            --header-height: 64px;
        }

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

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

        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

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

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

        ul,
        ol {
            list-style: none;
        }

        /* ===== 布局容器 ===== */
        .layout-wrapper {
            display: flex;
            min-height: 100vh;
        }

        .main-content {
            flex: 1;
            margin-left: var(--sidebar-width);
            padding: 0;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 30px;
            width: 100%;
        }

        /* ===== 左侧导航 ===== */
        .sidebar-nav {
            width: var(--sidebar-width);
            background: var(--bg-sidebar);
            color: var(--text-sidebar);
            position: fixed;
            top: 0;
            left: 0;
            height: 100vh;
            z-index: 1000;
            display: flex;
            flex-direction: column;
            padding: 0;
            box-shadow: var(--shadow-sidebar);
            overflow-y: auto;
            transition: transform var(--transition);
        }

        .sidebar-brand {
            padding: 28px 20px 16px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            text-align: center;
        }

        .sidebar-brand .logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .sidebar-brand .logo i {
            color: var(--accent);
            font-size: 1.5rem;
        }

        .sidebar-brand .logo-sub {
            font-size: 0.75rem;
            color: var(--text-light);
            margin-top: 4px;
            letter-spacing: 1px;
        }

        .sidebar-menu {
            padding: 16px 12px;
            flex: 1;
        }

        .sidebar-menu .menu-label {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: rgba(255, 255, 255, 0.3);
            padding: 8px 10px 6px;
            font-weight: 600;
        }

        .sidebar-menu a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            color: var(--text-sidebar);
            font-size: 0.92rem;
            font-weight: 500;
            transition: all var(--transition);
            margin-bottom: 2px;
        }

        .sidebar-menu a i {
            width: 20px;
            text-align: center;
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.35);
            transition: color var(--transition);
        }

        .sidebar-menu a:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }

        .sidebar-menu a:hover i {
            color: var(--accent);
        }

        .sidebar-menu a.active {
            background: rgba(232, 184, 48, 0.15);
            color: var(--accent);
            font-weight: 600;
        }

        .sidebar-menu a.active i {
            color: var(--accent);
        }

        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.72rem;
            color: rgba(255, 255, 255, 0.25);
            text-align: center;
        }

        /* ===== 移动端导航切换 ===== */
        .mobile-nav-toggle {
            display: none;
            position: fixed;
            top: 12px;
            left: 16px;
            z-index: 1100;
            background: var(--primary-dark);
            color: #fff;
            border: none;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            font-size: 1.3rem;
            cursor: pointer;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
            transition: background var(--transition);
            align-items: center;
            justify-content: center;
        }

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

        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
            opacity: 0;
            transition: opacity var(--transition);
        }

        .sidebar-overlay.show {
            opacity: 1;
        }

        /* ===== Page Hero ===== */
        .page-hero {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            padding: 60px 0 50px;
            position: relative;
            overflow: hidden;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(232, 184, 48, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.03) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-hero .container-custom {
            position: relative;
            z-index: 1;
        }

        .page-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(232, 184, 48, 0.15);
            color: var(--accent);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
            border: 1px solid rgba(232, 184, 48, 0.2);
        }

        .page-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .page-hero h1 span {
            color: var(--accent);
        }

        .page-hero p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 680px;
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .page-hero .hero-stats {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
            margin-top: 8px;
        }

        .page-hero .hero-stats .stat-item {
            text-align: center;
        }

        .page-hero .hero-stats .stat-number {
            font-size: 1.8rem;
            font-weight: 700;
            color: #fff;
            display: block;
        }

        .page-hero .hero-stats .stat-label {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 2px;
        }

        /* ===== 板块通用 ===== */
        .section-block {
            padding: 64px 0;
        }

        .section-block.bg-light {
            background: var(--bg-body);
        }

        .section-block.bg-white {
            background: #fff;
        }

        .section-block.bg-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }

        .section-title {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: -0.3px;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            margin-bottom: 36px;
            max-width: 600px;
        }

        .bg-dark .section-title {
            color: #fff;
        }

        .bg-dark .section-subtitle {
            color: rgba(255, 255, 255, 0.6);
        }

        .section-title .highlight {
            color: var(--accent);
        }

        .text-center .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 卡片通用 ===== */
        .card-custom {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
            border: 1px solid var(--border);
        }

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

        .card-custom .card-body {
            padding: 24px;
        }

        .card-custom .card-image {
            width: 100%;
            height: 200px;
            object-fit: cover;
            background: #eef2f7;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light);
            font-size: 2.5rem;
        }

        .card-custom .card-tag {
            display: inline-block;
            background: rgba(232, 184, 48, 0.12);
            color: var(--accent-dark);
            padding: 2px 12px;
            border-radius: 12px;
            font-size: 0.72rem;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .card-custom .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .card-custom .card-text {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
        }

        .card-custom .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-light);
            padding-top: 12px;
            border-top: 1px solid var(--border);
        }

        .card-custom .card-meta i {
            margin-right: 4px;
        }

        /* ===== 攻略网格 ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        /* ===== 特色攻略区块 ===== */
        .feature-guide {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .feature-guide .feature-image {
            background: #eef2f7;
            border-radius: var(--radius);
            height: 340px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 4rem;
            color: var(--text-light);
            overflow: hidden;
            position: relative;
        }

        .feature-guide .feature-image .img-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 20px 24px;
            background: linear-gradient(transparent, rgba(0, 0, 0, 0.6));
            color: #fff;
            font-weight: 600;
            font-size: 1.1rem;
        }

        .feature-guide .feature-list {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .feature-guide .feature-list .feature-item {
            display: flex;
            gap: 14px;
            align-items: flex-start;
        }

        .feature-guide .feature-list .feature-item .fi-icon {
            width: 40px;
            height: 40px;
            min-width: 40px;
            border-radius: 10px;
            background: rgba(232, 184, 48, 0.1);
            color: var(--accent-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
        }

        .feature-guide .feature-list .feature-item .fi-title {
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            margin-bottom: 2px;
        }

        .feature-guide .feature-list .feature-item .fi-desc {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== 技巧列表 ===== */
        .tips-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .tips-list .tip-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            border-left: 4px solid var(--accent);
            box-shadow: var(--shadow);
            transition: all var(--transition);
        }

        .tips-list .tip-item:hover {
            transform: translateX(4px);
            box-shadow: var(--shadow-hover);
        }

        .tips-list .tip-item .tip-number {
            font-size: 0.7rem;
            font-weight: 700;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 4px;
        }

        .tips-list .tip-item .tip-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }

        .tips-list .tip-item .tip-desc {
            font-size: 0.87rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== 标签/筛选项 ===== */
        .filter-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 32px;
        }

        .filter-tags .tag {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: #f0f2f5;
            border: 1px solid var(--border);
            cursor: pointer;
            transition: all var(--transition);
        }

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

        .filter-tags .tag.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

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

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }

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

        .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;
            gap: 12px;
            user-select: none;
            transition: color var(--transition);
        }

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

        .faq-item .faq-question i {
            color: var(--accent);
            transition: transform var(--transition);
            font-size: 0.85rem;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        .faq-item .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.8;
            display: none;
        }

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

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            border-radius: var(--radius-lg);
            padding: 48px 56px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-block::after {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(232, 184, 48, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-block h3 {
            font-size: 1.8rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }

        .cta-block p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 520px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 1;
        }

        .cta-block .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.92rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
        }

        .btn-primary:hover {
            background: var(--accent-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(232, 184, 48, 0.35);
        }

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

        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }

        .btn-secondary {
            background: var(--primary-light);
            color: #fff;
        }

        .btn-secondary:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(26, 58, 92, 0.3);
        }

        .btn-sm {
            padding: 8px 20px;
            font-size: 0.82rem;
        }

        /* ===== 分隔线 ===== */
        .divider {
            height: 1px;
            background: var(--border);
            margin: 0;
            border: none;
        }

        .divider-light {
            background: rgba(255, 255, 255, 0.08);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-sidebar);
            padding: 48px 0 0;
            margin-top: auto;
        }

        .site-footer .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 30px;
        }

        .site-footer .footer-logo {
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }

        .site-footer .footer-logo i {
            color: var(--accent);
        }

        .site-footer p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.5);
            line-height: 1.8;
            max-width: 320px;
        }

        .site-footer h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .site-footer ul li {
            margin-bottom: 10px;
        }

        .site-footer ul li a {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.88rem;
            transition: color var(--transition);
        }

        .site-footer ul li a:hover {
            color: var(--accent);
        }

        .site-footer ul li i {
            color: var(--accent);
            opacity: 0.6;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 20px 30px;
            margin-top: 40px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.3);
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.5);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb span {
            color: rgba(255, 255, 255, 0.85);
        }

        .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.25);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .feature-guide {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .feature-guide .feature-image {
                height: 260px;
            }

            .site-footer .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .page-hero h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --sidebar-width: 0px;
            }

            .sidebar-nav {
                transform: translateX(-100%);
                width: 280px;
            }

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

            .mobile-nav-toggle {
                display: flex;
            }

            .sidebar-overlay {
                display: block;
                pointer-events: none;
            }

            .sidebar-overlay.show {
                pointer-events: auto;
            }

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

            .page-hero {
                padding: 48px 0 40px;
            }

            .page-hero h1 {
                font-size: 1.7rem;
            }

            .page-hero p {
                font-size: 0.95rem;
            }

            .page-hero .hero-stats {
                gap: 20px;
            }

            .page-hero .hero-stats .stat-number {
                font-size: 1.4rem;
            }

            .section-block {
                padding: 44px 0;
            }

            .section-title {
                font-size: 1.4rem;
            }

            .guide-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .tips-list {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .container-custom {
                padding: 0 18px;
            }

            .cta-block {
                padding: 32px 24px;
                border-radius: var(--radius);
            }

            .cta-block h3 {
                font-size: 1.3rem;
            }

            .site-footer .footer-inner {
                grid-template-columns: 1fr;
                gap: 28px;
                padding: 0 18px;
            }

            .site-footer .footer-bottom {
                padding: 16px 18px;
                flex-direction: column;
                text-align: center;
            }

            .filter-tags {
                gap: 8px;
            }

            .filter-tags .tag {
                padding: 4px 14px;
                font-size: 0.78rem;
            }

            .faq-item .faq-question {
                padding: 14px 18px;
                font-size: 0.92rem;
            }

            .faq-item .faq-answer {
                padding: 0 18px 14px;
                font-size: 0.85rem;
            }

            .feature-guide .feature-image {
                height: 200px;
                font-size: 3rem;
            }
        }

        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 1.4rem;
            }

            .page-hero .hero-stats {
                gap: 14px;
            }

            .page-hero .hero-stats .stat-item {
                flex: 1;
                min-width: 60px;
            }

            .page-hero .hero-stats .stat-number {
                font-size: 1.2rem;
            }

            .page-hero .hero-stats .stat-label {
                font-size: 0.7rem;
            }

            .section-title {
                font-size: 1.2rem;
            }

            .card-custom .card-body {
                padding: 16px;
            }

            .card-custom .card-image {
                height: 160px;
            }

            .btn {
                padding: 10px 22px;
                font-size: 0.84rem;
            }

            .cta-block .btn-group {
                flex-direction: column;
                align-items: center;
            }

            .feature-guide .feature-list .feature-item .fi-icon {
                width: 32px;
                height: 32px;
                min-width: 32px;
                font-size: 0.9rem;
            }

            .tips-list .tip-item {
                padding: 14px 18px;
            }
        }

        /* ===== 辅助 ===== */
        .text-center {
            text-align: center;
        }

        .mb-8 {
            margin-bottom: 8px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .mb-32 {
            margin-bottom: 32px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-32 {
            margin-top: 32px;
        }

        .gap-8 {
            gap: 8px;
        }
        .gap-12 {
            gap: 12px;
        }
        .gap-16 {
            gap: 16px;
        }

        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .flex-wrap {
            flex-wrap: wrap;
        }

        .w-full {
            width: 100%;
        }

        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }

        /* ===== Foundation 覆盖 ===== */
        .grid-container {
            max-width: 1200px;
            padding-left: 30px;
            padding-right: 30px;
        }

        @media (max-width: 768px) {
            .grid-container {
                padding-left: 18px;
                padding-right: 18px;
            }
        }

        .cell {
            margin-bottom: 0;
        }

        /* ===== 动画 ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

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

        .animate-in-delay-1 {
            animation-delay: 0.1s;
        }
        .animate-in-delay-2 {
            animation-delay: 0.2s;
        }
        .animate-in-delay-3 {
            animation-delay: 0.3s;
        }

/* roulang page: article */
:root {
  --primary: #1a3a5c;
  --primary-light: #2a5a8c;
  --primary-dark: #0f2440;
  --accent: #e8a838;
  --accent-hover: #d4962e;
  --accent-light: #f5d48a;
  --bg-body: #f4f6f9;
  --bg-card: #ffffff;
  --bg-sidebar: #0f2440;
  --bg-sidebar-hover: #1a3a5c;
  --text-primary: #1a2a3a;
  --text-secondary: #4a5a6a;
  --text-light: #8a9aaa;
  --text-white: #f0f4fa;
  --border: #dce2ea;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 6px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --transition: 0.25s ease;
  --sidebar-width: 260px;
  --header-height: 0px;
  --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font-sans);background:var(--bg-body);color:var(--text-primary);line-height:1.7;min-height:100vh}
a{color:var(--primary-light);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--accent)}
img{max-width:100%;height:auto;display:block;border-radius:var(--radius-md)}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{line-height:1.3;font-weight:700;color:var(--text-primary);margin-bottom:0.5rem}
h1{font-size:2.2rem}h2{font-size:1.6rem}h3{font-size:1.25rem}h4{font-size:1.1rem}
p{margin-bottom:1rem;color:var(--text-secondary)}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.app-layout{display:flex;min-height:100vh}
.sidebar{width:var(--sidebar-width);background:var(--bg-sidebar);position:fixed;top:0;left:0;height:100vh;overflow-y:auto;z-index:100;display:flex;flex-direction:column;transition:transform var(--transition)}
.sidebar-brand{padding:32px 24px 20px;border-bottom:1px solid rgba(255,255,255,0.08)}
.logo{font-size:1.4rem;font-weight:800;color:var(--text-white);display:flex;align-items:center;gap:10px}
.logo i{color:var(--accent);font-size:1.5rem}
.logo-sub{font-size:0.8rem;color:var(--text-light);margin-top:4px;padding-left:36px;letter-spacing:0.5px}
.sidebar-menu{padding:16px 0;flex:1}
.menu-label{font-size:0.7rem;text-transform:uppercase;letter-spacing:1.2px;color:var(--text-light);padding:12px 24px 6px;opacity:0.6}
.sidebar-menu a{display:flex;align-items:center;gap:12px;padding:10px 24px;color:var(--text-white);font-size:0.95rem;font-weight:500;transition:all var(--transition);border-left:3px solid transparent}
.sidebar-menu a:hover{background:var(--bg-sidebar-hover);color:var(--accent-light);border-left-color:var(--accent)}
.sidebar-menu a.active{background:rgba(232,168,56,0.12);color:var(--accent);border-left-color:var(--accent)}
.sidebar-menu a i{width:20px;text-align:center;font-size:1rem}
.sidebar-footer{padding:16px 24px;border-top:1px solid rgba(255,255,255,0.08);font-size:0.75rem;color:var(--text-light)}
.main-content{flex:1;margin-left:var(--sidebar-width);padding:0;min-height:100vh}
.article-hero{background:linear-gradient(135deg,var(--primary-dark) 0%,var(--primary) 60%,var(--primary-light) 100%);padding:60px 48px 48px;color:var(--text-white)}
.article-hero h1{font-size:2rem;color:#fff;margin-bottom:12px;line-height:1.35}
.article-meta{display:flex;flex-wrap:wrap;gap:16px 24px;font-size:0.9rem;color:rgba(255,255,255,0.7);margin-bottom:8px}
.article-meta i{margin-right:6px;color:var(--accent)}
.article-meta .category-tag{background:var(--accent);color:var(--primary-dark);padding:2px 14px;border-radius:20px;font-size:0.8rem;font-weight:700}
.article-body{padding:40px 48px 24px;max-width:860px}
.article-body .content{font-size:1.05rem;line-height:1.85;color:var(--text-primary)}
.article-body .content p{margin-bottom:1.2rem}
.article-body .content h2,.article-body .content h3{margin-top:1.8rem;margin-bottom:0.8rem}
.article-body .content ul,.article-body .content ol{margin-bottom:1.2rem;padding-left:1.5rem}
.article-body .content li{margin-bottom:0.4rem;list-style:disc;color:var(--text-secondary)}
.article-body .content blockquote{border-left:4px solid var(--accent);padding:12px 20px;margin:1.2rem 0;background:rgba(232,168,56,0.06);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-secondary)}
.article-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px;padding-top:20px;border-top:1px solid var(--border)}
.article-tags .tag{background:var(--bg-body);padding:4px 16px;border-radius:20px;font-size:0.8rem;color:var(--text-secondary);border:1px solid var(--border);transition:all var(--transition)}
.article-tags .tag:hover{background:var(--accent-light);border-color:var(--accent);color:var(--primary-dark)}
.article-nav{display:flex;justify-content:space-between;gap:16px;padding:32px 48px;max-width:860px;flex-wrap:wrap}
.article-nav a{flex:1;min-width:180px;padding:16px 20px;background:var(--bg-card);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);border:1px solid var(--border);transition:all var(--transition);color:var(--text-primary);display:flex;flex-direction:column;gap:4px}
.article-nav a:hover{box-shadow:var(--shadow-md);border-color:var(--accent);transform:translateY(-2px)}
.article-nav .nav-label{font-size:0.75rem;color:var(--text-light);text-transform:uppercase;letter-spacing:0.5px}
.article-nav .nav-title{font-weight:600;font-size:0.95rem;color:var(--text-primary)}
.section{padding:48px 48px 32px;max-width:1200px}
.section-title{font-size:1.5rem;font-weight:700;margin-bottom:6px;color:var(--text-primary)}
.section-sub{color:var(--text-light);font-size:0.95rem;margin-bottom:28px}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px}
.related-card{background:var(--bg-card);border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--border);transition:all var(--transition);display:flex;flex-direction:column}
.related-card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px);border-color:var(--accent)}
.related-card .card-img{height:140px;background:linear-gradient(135deg,var(--primary-light),var(--primary-dark));display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,0.15);font-size:3rem}
.related-card .card-body{padding:16px 18px;flex:1;display:flex;flex-direction:column}
.related-card .card-body h4{font-size:1rem;margin-bottom:6px;color:var(--text-primary)}
.related-card .card-body p{font-size:0.85rem;color:var(--text-light);margin-bottom:12px;flex:1}
.related-card .card-meta{font-size:0.78rem;color:var(--text-light);display:flex;justify-content:space-between;align-items:center}
.related-card .card-meta .badge{background:var(--accent);color:var(--primary-dark);padding:2px 12px;border-radius:12px;font-size:0.7rem;font-weight:600}
.faq-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:16px}
.faq-item{background:var(--bg-card);border-radius:var(--radius-md);padding:20px 22px;box-shadow:var(--shadow-sm);border:1px solid var(--border);transition:all var(--transition)}
.faq-item:hover{box-shadow:var(--shadow-md);border-color:var(--accent)}
.faq-item h4{font-size:1rem;margin-bottom:6px;color:var(--text-primary);display:flex;align-items:center;gap:8px}
.faq-item h4 i{color:var(--accent);font-size:1.1rem}
.faq-item p{font-size:0.9rem;color:var(--text-secondary);margin-bottom:0}
.cta-section{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);border-radius:var(--radius-lg);padding:48px 40px;text-align:center;margin:0 48px 48px;color:#fff}
.cta-section h2{color:#fff;font-size:1.6rem;margin-bottom:12px}
.cta-section p{color:rgba(255,255,255,0.8);font-size:1rem;margin-bottom:24px;max-width:600px;margin-left:auto;margin-right:auto}
.cta-btn{display:inline-block;background:var(--accent);color:var(--primary-dark);padding:14px 40px;border-radius:40px;font-weight:700;font-size:1rem;transition:all var(--transition);border:2px solid var(--accent);box-shadow:0 4px 16px rgba(232,168,56,0.35)}
.cta-btn:hover{background:var(--accent-hover);border-color:var(--accent-hover);color:var(--primary-dark);transform:translateY(-2px);box-shadow:0 8px 28px rgba(232,168,56,0.45)}
.site-footer{background:var(--bg-sidebar);color:var(--text-white);padding:48px 48px 24px;margin-top:24px}
.footer-inner{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;max-width:1200px}
.footer-logo{font-size:1.3rem;font-weight:800;color:var(--text-white);display:flex;align-items:center;gap:10px;margin-bottom:12px}
.footer-logo i{color:var(--accent)}
.site-footer p{font-size:0.88rem;color:rgba(255,255,255,0.6);margin-bottom:0}
.site-footer h4{color:var(--text-white);font-size:0.95rem;margin-bottom:14px;font-weight:600}
.site-footer ul li{margin-bottom:8px}
.site-footer ul li a{color:rgba(255,255,255,0.55);font-size:0.88rem;transition:color var(--transition)}
.site-footer ul li a:hover{color:var(--accent)}
.site-footer ul li i{color:var(--accent);width:16px}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding-top:20px;margin-top:32px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;font-size:0.82rem;color:rgba(255,255,255,0.4);max-width:1200px}
.not-found{text-align:center;padding:80px 24px}
.not-found i{font-size:3rem;color:var(--text-light);margin-bottom:16px}
.not-found h2{font-size:1.6rem;margin-bottom:12px}
.not-found p{color:var(--text-secondary);margin-bottom:24px}
.not-found .back-btn{display:inline-block;background:var(--primary);color:#fff;padding:12px 32px;border-radius:30px;font-weight:600;transition:all var(--transition)}
.not-found .back-btn:hover{background:var(--primary-light);transform:translateY(-2px)}
.mobile-toggle{display:none;position:fixed;top:16px;left:16px;z-index:200;background:var(--primary);color:#fff;border:none;width:44px;height:44px;border-radius:var(--radius-sm);font-size:1.2rem;cursor:pointer;box-shadow:var(--shadow-md);transition:background var(--transition)}
.mobile-toggle:hover{background:var(--primary-light)}
@media (max-width:1024px){
  .footer-inner{grid-template-columns:1fr 1fr}
  .article-hero{padding:40px 28px 32px}
  .article-body{padding:28px 28px 16px}
  .article-nav{padding:24px 28px}
  .section{padding:32px 28px 24px}
  .cta-section{margin:0 28px 32px;padding:36px 28px}
  .site-footer{padding:36px 28px 20px}
}
@media (max-width:768px){
  .mobile-toggle{display:block}
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .sidebar-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.5);z-index:99}
  .sidebar-overlay.active{display:block}
  .main-content{margin-left:0}
  .article-hero{padding:28px 20px 24px}
  .article-hero h1{font-size:1.5rem}
  .article-body{padding:20px 20px 12px}
  .article-body .content{font-size:0.98rem}
  .article-nav{padding:16px 20px;flex-direction:column}
  .article-nav a{min-width:auto}
  .section{padding:24px 20px 16px}
  .section-title{font-size:1.25rem}
  .related-grid{grid-template-columns:1fr 1fr}
  .faq-grid{grid-template-columns:1fr}
  .cta-section{margin:0 20px 24px;padding:28px 20px}
  .cta-section h2{font-size:1.25rem}
  .footer-inner{grid-template-columns:1fr;gap:24px}
  .site-footer{padding:28px 20px 16px}
  .footer-bottom{flex-direction:column;text-align:center}
}
@media (max-width:520px){
  .related-grid{grid-template-columns:1fr}
  .article-meta{flex-direction:column;gap:8px}
  .article-hero h1{font-size:1.25rem}
}