/* roulang page: index */
/* ========== 设计变量 ========== */
        :root {
            --color-primary: #0b6e9a;
            --color-primary-dark: #08507a;
            --color-primary-light: #1a8fc4;
            --color-secondary: #14a87c;
            --color-secondary-dark: #0e8a64;
            --color-accent: #f0c040;
            --color-accent-dark: #d9a92e;
            --color-bg: #f8fafc;
            --color-bg-alt: #eef3f8;
            --color-bg-dark: #0f1a2e;
            --color-text: #1a2332;
            --color-text-light: #5a6b7e;
            --color-text-lighter: #8a9ab0;
            --color-border: #dce4ed;
            --color-white: #ffffff;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(11, 110, 154, 0.06);
            --shadow-md: 0 8px 28px rgba(11, 110, 154, 0.10);
            --shadow-lg: 0 20px 52px rgba(11, 110, 154, 0.14);
            --shadow-xl: 0 32px 72px rgba(11, 110, 154, 0.18);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ========== Reset / Base ========== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.6;
            color: var(--color-text);
            background: var(--color-bg);
            min-height: 100vh;
        }
        a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--color-primary-light); }
        a:focus-visible { outline: 3px solid var(--color-primary-light); outline-offset: 2px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea, select { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--color-text); }
        h1 { font-size: clamp(2.2rem, 6vw, 3.8rem); }
        h2 { font-size: clamp(1.6rem, 4vw, 2.6rem); }
        h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 0.8rem; }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) { .container { padding: 0 16px; } }

        /* ========== 按钮 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 30px;
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: var(--radius-md);
            transition: all var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--color-primary);
            color: var(--color-white) !important;
            border-color: var(--color-primary);
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-primary:active { transform: translateY(0); box-shadow: var(--shadow-sm); }
        .btn-secondary {
            background: var(--color-secondary);
            color: var(--color-white) !important;
            border-color: var(--color-secondary);
        }
        .btn-secondary:hover {
            background: var(--color-secondary-dark);
            border-color: var(--color-secondary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-outline {
            background: transparent;
            color: var(--color-primary) !important;
            border-color: var(--color-primary);
        }
        .btn-outline:hover {
            background: var(--color-primary);
            color: var(--color-white) !important;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-accent {
            background: var(--color-accent);
            color: var(--color-text) !important;
            border-color: var(--color-accent);
        }
        .btn-accent:hover {
            background: var(--color-accent-dark);
            border-color: var(--color-accent-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-lg { padding: 16px 40px; font-size: 1.1rem; border-radius: var(--radius-lg); }
        .btn-sm { padding: 8px 18px; font-size: 0.85rem; border-radius: var(--radius-sm); }
        .btn i { font-size: 1.1em; }

        /* ========== 徽章 / 标签 ========== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            background: var(--color-bg-alt);
            color: var(--color-text-light);
            border: 1px solid var(--color-border);
        }
        .badge-primary { background: rgba(11, 110, 154, 0.12); color: var(--color-primary); border-color: rgba(11, 110, 154, 0.2); }
        .badge-secondary { background: rgba(20, 168, 124, 0.12); color: var(--color-secondary); border-color: rgba(20, 168, 124, 0.2); }
        .badge-accent { background: rgba(240, 192, 64, 0.18); color: #8a6d1a; border-color: rgba(240, 192, 64, 0.3); }

        /* ========== 导航 Header ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid rgba(220, 228, 237, 0.5);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled { background: rgba(255, 255, 255, 0.97); box-shadow: var(--shadow-sm); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            gap: 20px;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--color-primary) !important;
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .site-logo i { font-size: 1.3em; color: var(--color-secondary); }
        .site-logo span { background: linear-gradient(135deg, var(--color-primary), var(--color-secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

        /* 搜索框（导航视觉中心） */
        .nav-search {
            flex: 1;
            max-width: 520px;
            position: relative;
            margin: 0 12px;
        }
        .nav-search input {
            width: 100%;
            padding: 10px 20px 10px 46px;
            border-radius: 50px;
            border: 2px solid var(--color-border);
            background: var(--color-white);
            font-size: 0.92rem;
            color: var(--color-text);
            transition: all var(--transition);
            outline: none;
        }
        .nav-search input:focus {
            border-color: var(--color-primary-light);
            box-shadow: 0 0 0 4px rgba(11, 110, 154, 0.10);
        }
        .nav-search input::placeholder { color: var(--color-text-lighter); }
        .nav-search .search-icon {
            position: absolute;
            left: 18px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--color-text-lighter);
            font-size: 1rem;
            pointer-events: none;
        }

        /* 导航菜单 */
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .nav-menu a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.92rem;
            color: var(--color-text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav-menu a:hover { color: var(--color-primary); background: rgba(11, 110, 154, 0.06); }
        .nav-menu a.active { color: var(--color-primary); background: rgba(11, 110, 154, 0.10); font-weight: 600; }
        .nav-menu a i { font-size: 0.9em; }

        /* 移动端菜单切换 */
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .menu-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--color-text);
            border-radius: 4px;
            transition: all var(--transition);
        }
        .menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .menu-toggle.active span:nth-child(2) { opacity: 0; }
        .menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

        @media (max-width: 900px) {
            .nav-search { max-width: 280px; }
            .nav-menu a { padding: 8px 10px; font-size: 0.85rem; }
        }
        @media (max-width: 768px) {
            .header-inner { padding: 0 16px; gap: 10px; }
            .nav-search { max-width: 200px; }
            .nav-search input { padding: 9px 14px 9px 38px; font-size: 0.85rem; }
            .nav-search .search-icon { left: 14px; }
            .menu-toggle { display: flex; }
            .nav-menu {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 20px 28px;
                gap: 4px;
                border-bottom: 1px solid var(--color-border);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all var(--transition);
                box-shadow: var(--shadow-md);
                z-index: 999;
            }
            .nav-menu.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
            .nav-menu a { width: 100%; padding: 12px 16px; border-radius: var(--radius-sm); font-size: 0.95rem; }
            .nav-search { flex: 1; max-width: none; margin: 0 4px; }
            .site-logo { font-size: 1.35rem; }
        }
        @media (max-width: 480px) {
            .nav-search input { padding: 9px 12px 9px 34px; font-size: 0.8rem; }
            .nav-search .search-icon { left: 12px; font-size: 0.85rem; }
            .site-logo { font-size: 1.2rem; }
        }

        /* ========== Hero 首屏 ========== */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 120px 24px 80px;
            background: linear-gradient(135deg, rgba(11, 110, 154, 0.88), rgba(20, 168, 124, 0.70)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            color: var(--color-white);
            overflow: hidden;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 180px;
            background: linear-gradient(to top, var(--color-bg) 0%, transparent 100%);
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 22px;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.20);
            backdrop-filter: blur(8px);
            color: var(--color-white);
            font-size: 0.88rem;
            font-weight: 500;
            letter-spacing: 0.5px;
            margin-bottom: 28px;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .hero h1 {
            color: var(--color-white);
            margin-bottom: 20px;
            font-weight: 800;
            letter-spacing: -1px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.15);
        }
        .hero h1 i { color: var(--color-accent); }
        .hero p {
            font-size: clamp(1.05rem, 2vw, 1.35rem);
            color: rgba(255, 255, 255, 0.90);
            max-width: 620px;
            margin: 0 auto 36px;
            line-height: 1.7;
            text-shadow: 0 1px 8px rgba(0,0,0,0.10);
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .hero-actions .btn { min-width: 160px; }
        .hero-actions .btn-outline { border-color: rgba(255,255,255,0.5); color: var(--color-white) !important; }
        .hero-actions .btn-outline:hover { background: rgba(255,255,255,0.20); border-color: var(--color-white); }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 56px;
            flex-wrap: wrap;
        }
        .hero-stats .stat-item { text-align: center; }
        .hero-stats .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--color-white);
            line-height: 1.2;
        }
        .hero-stats .stat-label {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .hero { min-height: 80vh; padding: 100px 16px 60px; }
            .hero-stats { gap: 24px; }
            .hero-stats .stat-number { font-size: 1.6rem; }
        }
        @media (max-width: 480px) {
            .hero { min-height: 70vh; padding: 80px 12px 40px; }
            .hero-actions .btn { min-width: 140px; }
            .hero-stats { gap: 16px; }
        }

        /* ========== 板块通用 ========== */
        .section {
            padding: 80px 0;
        }
        .section-alt { background: var(--color-bg-alt); }
        .section-dark { background: var(--color-bg-dark); color: var(--color-white); }
        .section-dark h2, .section-dark h3, .section-dark .section-sub { color: var(--color-white); }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header h2 {
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }
        .section-header h2::after {
            content: '';
            display: block;
            width: 50px;
            height: 3px;
            background: var(--color-secondary);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-sub {
            font-size: 1.05rem;
            color: var(--color-text-light);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .section { padding: 56px 0; }
            .section-header { margin-bottom: 36px; }
        }
        @media (max-width: 480px) {
            .section { padding: 40px 0; }
        }

        /* ========== 简介板块 ========== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .intro-text h3 { font-size: 1.3rem; color: var(--color-primary); margin-bottom: 16px; }
        .intro-text p { color: var(--color-text-light); line-height: 1.8; }
        .intro-text .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            margin-top: 24px;
        }
        .intro-text .intro-features li {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 16px;
            background: var(--color-white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            font-weight: 500;
            font-size: 0.92rem;
        }
        .intro-text .intro-features li i { color: var(--color-secondary); font-size: 1.1rem; }
        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }
        .intro-image img { width: 100%; height: 400px; object-fit: cover; transition: transform 0.6s ease; }
        .intro-image:hover img { transform: scale(1.03); }
        @media (max-width: 900px) {
            .intro-grid { grid-template-columns: 1fr; gap: 36px; }
            .intro-image img { height: 300px; }
        }
        @media (max-width: 480px) {
            .intro-text .intro-features { grid-template-columns: 1fr; }
            .intro-image img { height: 220px; }
        }

        /* ========== 分类卡片 ========== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .category-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .category-card .card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .category-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
        .category-card:hover .card-img img { transform: scale(1.06); }
        .category-card .card-img .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(0,0,0,0.3), transparent 60%);
        }
        .category-card .card-body {
            padding: 24px 22px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .category-card .card-body h3 { font-size: 1.2rem; margin-bottom: 8px; }
        .category-card .card-body p { color: var(--color-text-light); font-size: 0.92rem; line-height: 1.7; flex: 1; margin-bottom: 16px; }
        .category-card .card-body .btn { align-self: flex-start; }
        .category-card .card-img .badge {
            position: absolute;
            top: 16px;
            left: 16px;
            z-index: 2;
            background: rgba(255,255,255,0.90);
            backdrop-filter: blur(6px);
            color: var(--color-text);
            border: none;
        }
        @media (max-width: 900px) {
            .category-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 600px) {
            .category-grid { grid-template-columns: 1fr; }
            .category-card .card-img { height: 180px; }
        }

        /* ========== 数据统计 ========== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            text-align: center;
        }
        .stat-block {
            background: var(--color-white);
            padding: 32px 20px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            transition: all var(--transition);
        }
        .stat-block:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
        .stat-block .icon {
            font-size: 2.2rem;
            color: var(--color-secondary);
            margin-bottom: 12px;
        }
        .stat-block .number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1.2;
        }
        .stat-block .label {
            color: var(--color-text-light);
            font-size: 0.92rem;
            margin-top: 6px;
        }
        @media (max-width: 768px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .stat-block { padding: 24px 16px; }
            .stat-block .number { font-size: 1.8rem; }
        }
        @media (max-width: 480px) {
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
        }

        /* ========== 内容列表（CMS） ========== */
        .content-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .content-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .content-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }
        .content-card .card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .content-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
        .content-card:hover .card-img img { transform: scale(1.05); }
        .content-card .card-img .badge {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
        }
        .content-card .card-body {
            padding: 22px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .content-card .card-body h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .content-card .card-body h3 a { color: var(--color-text); }
        .content-card .card-body h3 a:hover { color: var(--color-primary); }
        .content-card .card-body .excerpt {
            color: var(--color-text-light);
            font-size: 0.9rem;
            line-height: 1.7;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
        }
        .content-card .card-body .meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--color-text-lighter);
            border-top: 1px solid var(--color-border);
            padding-top: 14px;
        }
        .content-card .card-body .meta i { margin-right: 4px; }
        .content-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 20px;
            background: var(--color-white);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--color-border);
            color: var(--color-text-lighter);
            font-size: 1.05rem;
        }
        @media (max-width: 768px) {
            .content-list { grid-template-columns: 1fr; gap: 20px; }
            .content-card .card-img { height: 180px; }
        }

        /* ========== 探索路线 / 流程 ========== */
        .route-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }
        .route-grid::before {
            content: '';
            position: absolute;
            top: 60px;
            left: 10%;
            right: 10%;
            height: 3px;
            background: linear-gradient(to right, var(--color-primary-light), var(--color-secondary));
            border-radius: 4px;
            z-index: 0;
        }
        .route-step {
            background: var(--color-white);
            border-radius: var(--radius-md);
            padding: 28px 20px 24px;
            text-align: center;
            border: 1px solid var(--color-border);
            position: relative;
            z-index: 1;
            transition: all var(--transition);
        }
        .route-step:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .route-step .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--color-primary);
            color: var(--color-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
            margin: 0 auto 16px;
            border: 3px solid var(--color-white);
            box-shadow: 0 0 0 3px var(--color-primary-light), var(--shadow-sm);
        }
        .route-step h4 { font-size: 1.05rem; margin-bottom: 8px; }
        .route-step p { color: var(--color-text-light); font-size: 0.88rem; line-height: 1.6; margin: 0; }
        @media (max-width: 900px) {
            .route-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .route-grid::before { display: none; }
        }
        @media (max-width: 480px) {
            .route-grid { grid-template-columns: 1fr; gap: 14px; }
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--color-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--color-primary-light); }
        .faq-item .faq-q {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            background: none;
            width: 100%;
            text-align: left;
            color: var(--color-text);
            transition: background var(--transition);
        }
        .faq-item .faq-q:hover { background: rgba(11, 110, 154, 0.03); }
        .faq-item .faq-q i { color: var(--color-primary); transition: transform var(--transition); font-size: 0.9rem; }
        .faq-item.open .faq-q i { transform: rotate(180deg); }
        .faq-item .faq-a {
            padding: 0 24px 18px;
            color: var(--color-text-light);
            line-height: 1.7;
            font-size: 0.94rem;
            display: none;
        }
        .faq-item.open .faq-a { display: block; }
        @media (max-width: 768px) {
            .faq-item .faq-q { padding: 16px 18px; font-size: 0.95rem; }
            .faq-item .faq-a { padding: 0 18px 16px; }
        }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary), var(--color-secondary));
            border-radius: var(--radius-xl);
            padding: 60px 48px;
            text-align: center;
            color: var(--color-white);
            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: 0.08;
            pointer-events: none;
        }
        .cta-section h2 { color: var(--color-white); margin-bottom: 16px; position: relative; z-index: 1; }
        .cta-section p { color: rgba(255,255,255,0.85); max-width: 540px; margin: 0 auto 28px; font-size: 1.05rem; position: relative; z-index: 1; }
        .cta-section .btn { position: relative; z-index: 1; }
        .cta-section .btn-outline { border-color: rgba(255,255,255,0.4); color: var(--color-white) !important; }
        .cta-section .btn-outline:hover { background: rgba(255,255,255,0.15); border-color: var(--color-white); }
        @media (max-width: 768px) {
            .cta-section { padding: 40px 24px; border-radius: var(--radius-lg); }
        }
        @media (max-width: 480px) {
            .cta-section { padding: 32px 16px; }
            .cta-section .btn { width: 100%; }
        }

        /* ========== 页脚 Footer ========== */
        .site-footer {
            background: var(--color-bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 56px 0 32px;
            margin-top: 80px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
            margin-bottom: 28px;
        }
        .footer-brand .site-logo { margin-bottom: 12px; }
        .footer-brand .site-logo span { -webkit-text-fill-color: var(--color-white); color: var(--color-white); }
        .footer-brand .site-logo i { color: var(--color-accent); }
        .footer-brand p { font-size: 0.88rem; line-height: 1.7; max-width: 320px; }
        .footer-col h4 { color: var(--color-white); font-size: 1rem; margin-bottom: 16px; font-weight: 600; }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.6);
            font-size: 0.88rem;
            padding: 5px 0;
            transition: all var(--transition);
        }
        .footer-col a:hover { color: var(--color-accent); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.84rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--color-accent); }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
            .site-footer { margin-top: 56px; padding: 40px 0 24px; }
        }
        @media (max-width: 480px) {
            .footer-grid { grid-template-columns: 1fr; gap: 20px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ========== 工具类 ========== */
        .text-center { text-align: center; }
        .mt-20 { margin-top: 20px; }
        .mb-20 { margin-bottom: 20px; }
        .gap-16 { gap: 16px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

        /* ========== 滚动动画 ========== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #0a7e8c;
            --primary-dark: #065a64;
            --primary-light: #e0f2f5;
            --accent: #f5a623;
            --accent-dark: #d48e1a;
            --bg-body: #f8fafc;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #0b1a2e;
            --bg-dark-light: #13273f;
            --text-primary: #1a2a3a;
            --text-secondary: #4a5a6a;
            --text-muted: #8a9aaa;
            --text-light: #f0f4f8;
            --border-light: #e2e8f0;
            --border-card: #eef2f6;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --shadow-hover: 0 8px 30px rgba(10,126,140,0.18);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }

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

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            height: var(--header-height);
            transition: var(--transition);
        }
        .site-header.scrolled { box-shadow: var(--shadow-md); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            gap: 20px;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .site-logo i { color: var(--primary); font-size: 28px; }
        .site-logo span { background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .site-logo:hover { opacity: 0.85; }

        /* Search Bar (header focal) */
        .header-search {
            flex: 1;
            max-width: 480px;
            position: relative;
            margin: 0 12px;
        }
        .header-search input {
            width: 100%;
            padding: 10px 20px 10px 44px;
            border: 2px solid var(--border-light);
            border-radius: 50px;
            background: var(--bg-body);
            font-size: 14px;
            color: var(--text-primary);
            transition: var(--transition);
            outline: none;
        }
        .header-search input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(10,126,140,0.12);
            background: var(--bg-white);
        }
        .header-search input::placeholder { color: var(--text-muted); }
        .header-search .search-icon {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 16px;
            pointer-events: none;
        }

        /* Nav Menu */
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
        }
        .nav-menu a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-menu a i { font-size: 14px; }
        .nav-menu a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-menu a.active {
            color: var(--primary-dark);
            background: var(--primary-light);
            font-weight: 600;
        }

        /* Mobile Toggle */
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
            background: none;
            border: none;
            flex-shrink: 0;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: var(--transition);
        }

        /* ===== Article Hero ===== */
        .article-hero {
            padding-top: calc(var(--header-height) + 40px);
            padding-bottom: 40px;
            background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-dark-light) 100%);
            position: relative;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .article-hero .container { position: relative; z-index: 1; }
        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255,255,255,0.6);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-breadcrumb a { color: rgba(255,255,255,0.7); }
        .article-breadcrumb a:hover { color: var(--accent); }
        .article-breadcrumb span { color: rgba(255,255,255,0.4); }
        .article-hero h1 {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            max-width: 800px;
            margin-bottom: 16px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            color: rgba(255,255,255,0.7);
            font-size: 14px;
        }
        .article-meta .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            background: var(--accent);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
        }
        .article-meta i { margin-right: 4px; }

        /* ===== Article Main ===== */
        .article-main {
            padding: 48px 0 64px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }

        /* Article Body */
        .article-body {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 40px;
            border: 1px solid var(--border-card);
        }
        .article-body .featured-image {
            width: 100%;
            border-radius: var(--radius-sm);
            margin-bottom: 32px;
            object-fit: cover;
            max-height: 480px;
        }
        .article-body .content {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-primary);
        }
        .article-body .content p {
            margin-bottom: 1.2em;
        }
        .article-body .content h2, .article-body .content h3 {
            margin-top: 1.6em;
            margin-bottom: 0.6em;
            font-weight: 700;
            color: var(--text-primary);
        }
        .article-body .content h2 { font-size: 24px; }
        .article-body .content h3 { font-size: 20px; }
        .article-body .content ul, .article-body .content ol {
            margin-bottom: 1.2em;
            padding-left: 24px;
        }
        .article-body .content ul { list-style: disc; }
        .article-body .content ol { list-style: decimal; }
        .article-body .content li { margin-bottom: 0.4em; }
        .article-body .content blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 20px;
            background: var(--primary-light);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 1.4em 0;
            color: var(--text-secondary);
        }
        .article-body .content img {
            border-radius: var(--radius-sm);
            margin: 1.2em 0;
            width: 100%;
        }
        .article-body .content a { color: var(--primary); font-weight: 500; text-decoration: underline; }
        .article-body .content a:hover { color: var(--primary-dark); }

        .article-footer-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
            flex-wrap: wrap;
            gap: 12px;
        }
        .article-footer-nav a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            border-radius: 50px;
            background: var(--bg-body);
            color: var(--text-secondary);
            font-size: 14px;
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .article-footer-nav a:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: var(--primary);
        }

        /* Sidebar */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 28px 24px;
            border: 1px solid var(--border-card);
        }
        .sidebar-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--primary); }
        .sidebar-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .sidebar-list a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .sidebar-list a:last-child { border-bottom: none; }
        .sidebar-list a:hover { padding-left: 6px; }
        .sidebar-list .thumb {
            width: 64px;
            height: 48px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--bg-body);
        }
        .sidebar-list .info { flex: 1; min-width: 0; }
        .sidebar-list .info .title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.4;
        }
        .sidebar-list .info .date {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 4px;
        }
        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .sidebar-tags a {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            background: var(--bg-body);
            color: var(--text-secondary);
            font-size: 13px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .sidebar-tags a:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: var(--primary);
        }

        /* ===== Related Section ===== */
        .related-section {
            padding: 48px 0 64px;
            background: var(--bg-body);
            border-top: 1px solid var(--border-light);
        }
        .related-section h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 28px;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .related-section h2 i { color: var(--primary); }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            border: 1px solid var(--border-card);
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--bg-body);
        }
        .related-card .card-body {
            padding: 20px;
        }
        .related-card .card-body .cat {
            font-size: 12px;
            color: var(--primary);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .related-card .card-body h3 {
            font-size: 16px;
            font-weight: 700;
            margin: 8px 0;
            line-height: 1.4;
            color: var(--text-primary);
        }
        .related-card .card-body h3 a { color: inherit; }
        .related-card .card-body h3 a:hover { color: var(--primary); }
        .related-card .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body .date {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 8px;
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 24px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-card);
        }
        .not-found-box i {
            font-size: 48px;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .not-found-box h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }
        .not-found-box .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: 50px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            transition: var(--transition);
        }
        .not-found-box .btn:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.8);
            padding: 48px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .site-logo { color: #fff; margin-bottom: 12px; }
        .footer-brand .site-logo i { color: var(--accent); }
        .footer-brand .site-logo span { -webkit-text-fill-color: #fff; background: none; }
        .footer-brand p { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 320px; }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col a {
            display: block;
            padding: 5px 0;
            font-size: 14px;
            color: rgba(255,255,255,0.6);
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--accent); padding-left: 4px; }
        .footer-col a i { margin-right: 6px; width: 16px; text-align: center; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 13px;
            color: rgba(255,255,255,0.4);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--accent); }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }
        .btn-primary { background: var(--primary); color: #fff; }
        .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
            .header-search { max-width: 320px; }
        }
        @media (max-width: 768px) {
            .header-inner { padding: 0 16px; gap: 12px; }
            .header-search { max-width: 200px; }
            .header-search input { padding: 8px 14px 8px 36px; font-size: 13px; }
            .header-search .search-icon { left: 12px; font-size: 14px; }
            .nav-menu {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                border-bottom: 2px solid var(--border-light);
            }
            .nav-menu.open { transform: translateY(0); opacity: 1; pointer-events: all; }
            .nav-menu a { width: 100%; padding: 12px 16px; border-radius: var(--radius-sm); }
            .nav-toggle { display: flex; }
            .article-hero h1 { font-size: 26px; }
            .article-body { padding: 24px; }
            .article-body .content { font-size: 15px; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .article-meta { gap: 12px; font-size: 13px; }
        }
        @media (max-width: 520px) {
            .header-search { display: none; }
            .article-hero h1 { font-size: 22px; }
            .article-body { padding: 16px; }
            .article-body .content { font-size: 14px; }
            .article-footer-nav { flex-direction: column; align-items: stretch; }
            .article-footer-nav a { justify-content: center; }
            .sidebar-card { padding: 20px 16px; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0a7e8c;
            --primary-dark: #065a63;
            --primary-light: #e0f2f5;
            --primary-glow: rgba(10, 126, 140, 0.15);
            --accent: #f5a623;
            --accent-dark: #d48e1a;
            --accent-light: #fef3e0;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #0b1a2e;
            --bg-dark-light: #132a44;
            --text-primary: #1a2332;
            --text-secondary: #4a5a6e;
            --text-light: #8a9aae;
            --text-white: #f0f4f8;
            --border: #e2e8f0;
            --border-light: #f0f4f8;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.08);
            --shadow-glow: 0 8px 40px rgba(10, 126, 140, 0.12);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container: 1200px;
            --header-h: 72px;
        }

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

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

        body {
            font-family: var(--font-base);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            padding-top: var(--header-h);
        }

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 16px;
        }

        /* Logo */
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            text-decoration: none;
            flex-shrink: 0;
        }
        .site-logo i {
            font-size: 26px;
            color: var(--primary);
            transition: transform var(--transition);
        }
        .site-logo:hover i {
            transform: rotate(-8deg) scale(1.05);
        }
        .site-logo span {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        /* Search bar */
        .search-box {
            flex: 1;
            max-width: 480px;
            position: relative;
            margin: 0 8px;
        }
        .search-box input {
            width: 100%;
            padding: 10px 20px 10px 44px;
            border-radius: 50px;
            border: 1.5px solid var(--border);
            background: var(--bg-body);
            font-size: 15px;
            color: var(--text-primary);
            transition: all var(--transition);
        }
        .search-box input::placeholder {
            color: var(--text-light);
        }
        .search-box input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px var(--primary-glow);
            background: #fff;
        }
        .search-box .search-icon {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-light);
            font-size: 16px;
            pointer-events: none;
        }

        /* Nav menu */
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
        }
        .nav-menu a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            text-decoration: none;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-menu a i {
            font-size: 15px;
            opacity: 0.7;
        }
        .nav-menu a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-menu a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 16px var(--primary-glow);
        }
        .nav-menu a.active i {
            opacity: 1;
        }

        /* Mobile toggle */
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 6px;
            background: none;
            border: none;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: all var(--transition);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Hero ===== */
        .category-hero {
            position: relative;
            min-height: 360px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 80px 24px 70px;
            background: linear-gradient(135deg, rgba(11, 26, 46, 0.82), rgba(10, 126, 140, 0.72)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            color: #fff;
            overflow: hidden;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, var(--bg-body), transparent);
        }
        .category-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 760px;
        }
        .category-hero .hero-badge {
            display: inline-block;
            padding: 6px 20px;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(4px);
            font-size: 14px;
            font-weight: 500;
            letter-spacing: 0.5px;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 20px;
            border: 1px solid rgba(255, 255, 255, 0.12);
        }
        .category-hero h1 {
            font-size: 44px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
        }
        .category-hero p {
            font-size: 18px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 24px;
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            margin-top: 16px;
        }
        .hero-stats .stat-item {
            text-align: center;
        }
        .hero-stats .stat-num {
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            display: block;
            line-height: 1.2;
        }
        .hero-stats .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            font-weight: 400;
        }

        /* ===== Section共用 ===== */
        section {
            padding: 80px 0;
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
            letter-spacing: -0.3px;
        }
        .section-sub {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 640px;
            margin-bottom: 48px;
            line-height: 1.6;
        }
        .section-title.centered {
            text-align: center;
        }
        .section-sub.centered {
            text-align: center;
            margin-left: auto;
            margin-right: auto;
        }
        .sub-accent {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 50px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }

        /* ===== Cards Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 28px;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }
        .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: var(--radius) var(--radius) 0 0;
            display: block;
        }
        .card-body {
            padding: 24px 22px 26px;
        }
        .card-body .card-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .card-body h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .card-body p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 16px;
            font-size: 13px;
            color: var(--text-light);
        }
        .card-body .card-meta i {
            margin-right: 4px;
        }

        /* ===== 列表区块 ===== */
        .guide-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .guide-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 20px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            cursor: default;
        }
        .guide-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
            transform: translateX(4px);
        }
        .guide-item .guide-rank {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-light);
            min-width: 36px;
            text-align: center;
        }
        .guide-item .guide-info {
            flex: 1;
        }
        .guide-item .guide-info h4 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 2px;
        }
        .guide-item .guide-info p {
            font-size: 14px;
            color: var(--text-secondary);
        }
        .guide-item .guide-badge {
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary);
            flex-shrink: 0;
        }
        .guide-item .guide-badge.hot {
            background: #fef3e0;
            color: #d48e1a;
        }
        .guide-item .guide-badge.new {
            background: #e0f5ec;
            color: #0a7e5c;
        }

        /* ===== 数据区块 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 28px;
            text-align: center;
        }
        .stat-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 36px 20px 32px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .stat-card .stat-icon {
            font-size: 38px;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .stat-card .stat-num {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.2;
        }
        .stat-card .stat-label {
            font-size: 15px;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        /* ===== 图文区块 ===== */
        .feature-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .feature-block .feature-img {
            border-radius: var(--radius);
            box-shadow: var(--shadow-lg);
            width: 100%;
            height: 360px;
            object-fit: cover;
        }
        .feature-block .feature-content h3 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .feature-block .feature-content p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 20px;
            line-height: 1.7;
        }
        .feature-block .feature-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .feature-block .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 15px;
            color: var(--text-secondary);
        }
        .feature-block .feature-list li i {
            color: var(--primary);
            margin-top: 3px;
            flex-shrink: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            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-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 24px;
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: var(--primary-light);
        }
        .faq-question i {
            transition: transform var(--transition);
            color: var(--text-light);
            font-size: 14px;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-dark), var(--bg-dark-light));
            padding: 80px 0;
            text-align: center;
            color: #fff;
        }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }
        .cta-section p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 540px;
            margin: 0 auto 30px;
        }
        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            text-decoration: none;
            transition: all var(--transition);
            cursor: pointer;
            border: none;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 20px var(--primary-glow);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 30px var(--primary-glow);
        }
        .btn-secondary {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(4px);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.22);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 14px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 30px;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .site-footer .footer-brand .site-logo {
            color: #fff;
            margin-bottom: 16px;
        }
        .site-footer .footer-brand .site-logo i {
            color: var(--accent);
        }
        .site-footer .footer-brand .site-logo span {
            background: linear-gradient(135deg, #fff, #c8d8e8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-footer .footer-brand p {
            font-size: 15px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }
        .site-footer .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .site-footer .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.55);
            font-size: 15px;
            padding: 4px 0;
            transition: color var(--transition);
            text-decoration: none;
        }
        .site-footer .footer-col a:hover {
            color: var(--accent);
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.4);
        }
        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            text-decoration: none;
        }
        .site-footer .footer-bottom a:hover {
            color: var(--accent);
        }

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

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .feature-block {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .feature-block .feature-img {
                height: 280px;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
            }
            .header-inner {
                gap: 10px;
            }
            .search-box {
                max-width: 200px;
            }
            .search-box input {
                padding: 8px 14px 8px 36px;
                font-size: 14px;
            }
            .search-box .search-icon {
                left: 12px;
                font-size: 14px;
            }
            .nav-menu {
                position: fixed;
                top: var(--header-h);
                left: 0;
                width: 100%;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 4px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
                transform: translateY(-110%);
                opacity: 0;
                transition: all 0.35s ease;
                border-bottom: 1px solid var(--border);
                border-radius: 0 0 var(--radius) var(--radius);
            }
            .nav-menu.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-menu a {
                width: 100%;
                justify-content: center;
                padding: 12px 18px;
                font-size: 16px;
                border-radius: var(--radius-sm);
            }
            .nav-toggle {
                display: flex;
            }

            .category-hero {
                min-height: 300px;
                padding: 60px 20px 56px;
            }
            .category-hero h1 {
                font-size: 30px;
            }
            .category-hero p {
                font-size: 16px;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stats .stat-num {
                font-size: 26px;
            }

            section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .section-sub {
                font-size: 15px;
                margin-bottom: 32px;
            }

            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .card-img {
                height: 180px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-card {
                padding: 24px 16px 20px;
            }
            .stat-card .stat-num {
                font-size: 28px;
            }

            .guide-item {
                flex-wrap: wrap;
                padding: 16px 18px;
            }
            .guide-item .guide-rank {
                font-size: 18px;
                min-width: 28px;
            }
            .guide-item .guide-badge {
                font-size: 12px;
                padding: 4px 12px;
            }

            .cta-section h2 {
                font-size: 26px;
            }
            .cta-buttons .btn {
                padding: 10px 24px;
                font-size: 15px;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .search-box {
                max-width: 140px;
            }
            .search-box input {
                padding: 6px 10px 6px 32px;
                font-size: 13px;
            }
            .search-box .search-icon {
                left: 10px;
                font-size: 12px;
            }
            .site-logo {
                font-size: 18px;
            }
            .site-logo i {
                font-size: 20px;
            }

            .category-hero h1 {
                font-size: 26px;
            }
            .hero-stats {
                gap: 16px;
            }
            .hero-stats .stat-num {
                font-size: 22px;
            }
            .hero-stats .stat-label {
                font-size: 12px;
            }

            .section-title {
                font-size: 22px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .feature-block .feature-img {
                height: 200px;
            }
            .feature-block .feature-content h3 {
                font-size: 22px;
            }
            .faq-question {
                font-size: 15px;
                padding: 14px 18px;
            }
            .faq-answer {
                font-size: 14px;
            }
            .cta-section h2 {
                font-size: 22px;
            }
        }

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