/* roulang page: index */
:root {
            --brand: #3b55df;
            --brand-dark: #2f43c4;
            --brand-light: #eef4ff;
            --warm: #f97316;
            --warm-dark: #ea580c;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --border-light: #e2e8f0;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
            --shadow-sm: 0 2px 8px rgba(2, 6, 23, 0.05);
            --shadow-md: 0 6px 20px rgba(2, 6, 23, 0.08);
            --shadow-lg: 0 16px 40px rgba(2, 6, 23, 0.12);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Helvetica Neue', Arial, sans-serif;
            background: var(--bg-light);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input {
            font-family: inherit;
        }
        .container-site {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        /* 导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
        }
        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-wrap: wrap;
        }
        .nav-tab {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.45rem 1.1rem;
            border-radius: 999px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-muted);
            border: 1px solid transparent;
            transition: all 0.25s ease;
            white-space: nowrap;
        }
        .nav-tab:hover {
            color: var(--brand);
            background: var(--brand-light);
            border-color: #c3d4fe;
        }
        .nav-tab.active {
            color: #fff;
            background: var(--brand);
            border-color: var(--brand);
            box-shadow: 0 4px 12px rgba(59, 85, 223, 0.25);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, #f97316, #ea580c);
            color: #fff !important;
            padding: 0.65rem 1.5rem;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.9rem;
            border: none;
            cursor: pointer;
            box-shadow: 0 4px 16px rgba(249, 115, 22, 0.3);
            transition: all 0.3s ease;
            white-space: nowrap;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(249, 115, 22, 0.4);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.6rem 1.4rem;
            border-radius: 999px;
            border: 1.5px solid var(--border-light);
            font-weight: 500;
            font-size: 0.9rem;
            color: var(--text-main);
            background: #fff;
            transition: all 0.25s ease;
            white-space: nowrap;
        }
        .btn-outline:hover {
            border-color: var(--brand);
            color: var(--brand);
            box-shadow: var(--shadow-sm);
        }
        .btn-white {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: #fff;
            color: var(--brand-dark) !important;
            padding: 0.65rem 1.5rem;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all 0.3s ease;
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
        }
        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
        }

        /* Hero */
        .hero-section {
            position: relative;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            min-height: 560px;
            display: flex;
            align-items: center;
            isolation: isolate;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(24, 29, 90, 0.92), rgba(30, 41, 59, 0.75));
            z-index: -1;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(6px);
            padding: 0.35rem 1rem;
            border-radius: 999px;
            font-size: 0.85rem;
            color: #fff;
        }
        .hero-title {
            font-size: clamp(2.4rem, 5vw, 3.8rem);
            font-weight: 800;
            line-height: 1.2;
            color: #fff;
            letter-spacing: -0.02em;
        }
        .hero-subtitle {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            line-height: 1.8;
        }

        /* 卡片 */
        .card-base {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
            overflow: hidden;
        }
        .card-base:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: #c3d4fe;
        }
        .tag-pill {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.75rem;
            border-radius: 999px;
            background: var(--brand-light);
            color: var(--brand-dark);
            font-size: 0.78rem;
            font-weight: 600;
        }
        .tag-warm {
            background: #fff7ed;
            color: #ea580c;
        }
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--brand);
            margin-bottom: 0.5rem;
        }
        .section-title {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-main);
        }

        /* 统计 */
        .stat-card {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            padding: 1.5rem;
            text-align: center;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-sm);
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: #c3d4fe;
        }
        .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--brand-dark);
            line-height: 1.2;
        }

        /* 分类卡片 */
        .category-card {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            height: 300px;
            display: flex;
            align-items: flex-end;
            cursor: pointer;
            box-shadow: var(--shadow-sm);
            transition: all 0.35s ease;
            border: 1px solid var(--border-light);
        }
        .category-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
            z-index: 0;
        }
        .category-card::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 23, 42, 0.85), transparent 70%);
            z-index: 1;
        }
        .category-card:hover img {
            transform: scale(1.06);
        }
        .category-card:hover {
            box-shadow: var(--shadow-lg);
        }
        .category-card-content {
            position: relative;
            z-index: 2;
            padding: 1.5rem;
            color: #fff;
            width: 100%;
        }

        /* 列表卡片 */
        .news-card {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .news-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: #c3d4fe;
        }
        .news-card img,
        .news-cover {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: #f1f5f9;
        }
        .news-body {
            padding: 1.25rem;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            flex: 1;
        }
        .news-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.4;
            color: var(--text-main);
        }
        .news-body p {
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.6;
            flex: 1;
        }
        .news-body time {
            font-size: 0.8rem;
            color: #94a3b8;
        }

        /* 步骤 */
        .step-wrap {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            padding: 1.75rem;
            position: relative;
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
        }
        .step-wrap:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: linear-gradient(135deg, #3b55df, #6a8ef8);
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            margin-bottom: 1rem;
            box-shadow: 0 4px 12px rgba(59, 85, 223, 0.3);
        }

        /* FAQ */
        .faq-item {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            margin-bottom: 0.75rem;
            overflow: hidden;
            transition: all 0.25s ease;
        }
        .faq-item:hover {
            border-color: #c3d4fe;
        }
        .faq-item summary {
            cursor: pointer;
            padding: 1.1rem 1.4rem;
            font-weight: 600;
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            list-style: none;
            color: var(--text-main);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary i {
            color: var(--brand);
            font-size: 0.85rem;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }
        .faq-item[open] summary i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 1.4rem 1.2rem;
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        /* CTA */
        .cta-section {
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            isolation: isolate;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, #1e1b4b 20%, #3b55df 90%);
            opacity: 0.88;
            z-index: -1;
        }

        /* 页脚 */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 3rem 0 2rem;
        }
        .site-footer a {
            color: #94a3b8;
            transition: color 0.2s;
        }
        .site-footer a:hover {
            color: #fff;
        }

        /* 移动端导航 */
        .mobile-menu {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-md);
            padding: 1rem 1.25rem;
            flex-direction: column;
            gap: 0.5rem;
            z-index: 60;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu .nav-tab {
            padding: 0.6rem 1rem;
        }
        .hamburger {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            border: 1px solid var(--border-light);
            background: #fff;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            color: var(--text-main);
            transition: all 0.2s;
        }
        .hamburger:hover {
            background: var(--brand-light);
            color: var(--brand);
        }

        /* 响应式 */
        @media (max-width: 768px) {
            .desktop-tabs {
                display: none;
            }
            .hamburger {
                display: inline-flex;
            }
            .hero-section {
                min-height: 480px;
            }
        }
        @media (max-width: 520px) {
            .hero-section {
                min-height: 440px;
            }
            .hero-title {
                font-size: 2rem;
            }
            .container-site {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .stat-number {
                font-size: 1.6rem;
            }
            .category-card {
                height: 240px;
            }
        }

        /* focus 可访问性 */
        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 3px solid rgba(59, 85, 223, 0.4);
            outline-offset: 2px;
            border-radius: 4px;
        }

/* roulang page: article */
:root {
    --brand: #f06500;
    --brand-dark: #9a3d02;
    --brand-light: #ffeddc;
    --slate-900: #0f172a;
    --slate-700: #334155;
    --slate-500: #64748b;
    --slate-400: #94a3b8;
    --slate-100: #f1f5f9;
    --border: #e2e8f0;
  }

  * { box-sizing: border-box; }
  
  html { scroll-behavior: smooth; }

  body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    background: #f8fafc;
    color: var(--slate-900);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
  }

  .container-site {
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  /* ===== 导航 ===== */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 12px rgba(15, 23, 42, 0.05);
  }

  .site-header .desktop-tabs {
    gap: 0.25rem;
  }

  .nav-tab {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--slate-700);
    transition: all 0.2s ease;
    text-decoration: none;
    border: 1px solid transparent;
  }

  .nav-tab:hover {
    background: #fff1e6;
    color: var(--brand-dark);
  }

  .nav-tab.active {
    background: linear-gradient(135deg, #ff7d10, #f06500);
    color: #fff;
    box-shadow: 0 4px 12px rgba(240, 101, 0, 0.3);
  }

  .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border-radius: 9999px;
    background: linear-gradient(135deg, #ff7d10, #f06500);
    color: #fff;
    font-weight: 700;
    font-size: 0.875rem;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(240, 101, 0, 0.35);
    transition: all 0.25s ease;
    text-decoration: none;
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(240, 101, 0, 0.45);
  }

  .btn-primary:focus-visible {
    outline: 3px solid rgba(240, 101, 0, 0.4);
    outline-offset: 2px;
  }

  .btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border-radius: 9999px;
    border: 2px solid #ff7d10;
    color: #f06500;
    font-weight: 600;
    font-size: 0.875rem;
    background: transparent;
    transition: all 0.25s ease;
    text-decoration: none;
  }

  .btn-outline:hover {
    background: #ff7d10;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(240, 101, 0, 0.25);
  }

  .hamburger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--slate-700);
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.2s ease;
  }

  .hamburger:hover {
    background: #fff7ed;
    color: var(--brand);
  }

  .mobile-menu {
    display: none;
    padding: 1rem 1.25rem 1.5rem;
    background: #fff;
    border-top: 1px solid var(--border);
  }

  .mobile-menu.open {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }

  .mobile-menu .nav-tab {
    justify-content: flex-start;
    padding: 0.75rem 1rem;
    width: 100%;
  }

  /* ===== 文章页 ===== */
  .article-hero {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    padding: 4.5rem 0 5rem;
    position: relative;
    overflow: hidden;
  }

  .article-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    opacity: 0.15;
  }

  .article-hero-overlay {
    position: relative;
    z-index: 1;
  }

  .article-meta {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 1rem;
    background: rgba(255, 125, 16, 0.18);
    border: 1px solid rgba(255, 157, 54, 0.35);
    color: #ffc070;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.02em;
  }

  .article-title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 800;
    line-height: 1.3;
    color: #fff;
    margin: 1.25rem 0 1rem;
    text-shadow: 0 2px 12px rgba(0,0,0,0.3);
  }

  .article-date {
    color: rgba(255,255,255,0.6);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.625rem;
    flex-wrap: wrap;
  }

  .article-body {
    background: #fff;
    border-radius: 1.25rem;
    box-shadow: 0 8px 32px rgba(15, 23, 42, 0.08);
    padding: clamp(1.5rem, 4vw, 3rem);
    margin-top: -2rem;
    position: relative;
    z-index: 2;
  }

  .article-content {
    font-size: 1.05rem;
    line-height: 1.9;
    color: #334155;
  }

  .article-content h2 {
    font-size: 1.45rem;
    font-weight: 700;
    color: #0f172a;
    margin: 2rem 0 1rem;
    padding-left: 1rem;
    border-left: 4px solid #ff7d10;
    border-radius: 0 4px 4px 0;
    background: linear-gradient(90deg, #fff7ed, transparent);
  }

  .article-content h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: #1e293b;
    margin: 1.75rem 0 0.75rem;
  }

  .article-content p {
    margin-bottom: 1.25rem;
  }

  .article-content ul {
    margin: 1rem 0 1.5rem;
    padding-left: 0;
    list-style: none;
  }

  .article-content ul li {
    position: relative;
    padding: 0.5rem 0 0.5rem 1.75rem;
    color: #475569;
  }

  .article-content ul li::before {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    color: #f06500;
    font-size: 0.85rem;
    top: 0.75rem;
  }

  .article-content img {
    border-radius: 1rem;
    box-shadow: 0 8px 24px rgba(15,23,42,0.12);
    margin: 1.5rem 0;
    max-width: 100%;
    height: auto;
  }

  .article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
  }

  .tag-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.875rem;
    background: #fff7ed;
    color: #c24d00;
    border-radius: 9999px;
    font-size: 0.8125rem;
    font-weight: 600;
    border: 1px solid #ffdca8;
    transition: all 0.2s ease;
  }

  .tag-chip:hover {
    background: #ff7d10;
    color: #fff;
    border-color: #ff7d10;
    transform: translateY(-1px);
  }

  /* ===== 侧边信息卡 ===== */
  .side-card {
    background: #fff;
    border-radius: 1.25rem;
    border: 1px solid var(--border);
    padding: 1.5rem;
    box-shadow: 0 4px 20px rgba(15,23,42,0.05);
  }

  .side-card-title {
    font-size: 1rem;
    font-weight: 700;
    color: #0f172a;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid #fff1e6;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  .side-card-title i {
    color: #f06500;
  }

  .side-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.625rem 0;
    transition: all 0.2s ease;
  }

  .side-list li:hover {
    padding-left: 0.25rem;
  }

  .side-list li + li {
    border-top: 1px dashed #f1f5f9;
  }

  .side-list li a {
    color: #334155;
    font-size: 0.875rem;
    line-height: 1.5;
    transition: color 0.2s ease;
    text-decoration: none;
  }

  .side-list li a:hover {
    color: #f06500;
  }

  .side-list .list-icon {
    color: #ff9d36;
    font-size: 0.75rem;
    margin-top: 0.25rem;
    flex-shrink: 0;
  }

  /* ===== CTA 区 ===== */
  .cta-section {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    border-radius: 1.5rem;
    padding: 3rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
  }

  .cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-3.png');
    background-size: cover;
    background-position: center;
    opacity: 0.12;
  }

  .cta-content {
    position: relative;
    z-index: 1;
  }

  /* ===== 版权页脚 ===== */
  .site-footer {
    background: #0f172a;
    color: #94a3b8;
    padding-top: 4rem;
    padding-bottom: 2.5rem;
    margin-top: 5rem;
  }

  .site-footer a {
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.2s ease;
  }

  .site-footer a:hover {
    color: #ffc070;
  }

  /* ===== 响应式 ===== */
  @media (max-width: 768px) {
    .desktop-tabs {
      display: none !important;
    }
    .article-hero {
      padding: 3rem 0 4rem;
    }
    .article-body {
      padding: 1.5rem;
      margin-top: -1.5rem;
    }
    .article-content {
      font-size: 1rem;
    }
    .container-site {
      padding-left: 1rem;
      padding-right: 1rem;
    }
    .cta-section {
      padding: 2.5rem 1.25rem;
      border-radius: 1rem;
    }
  }

  @media (max-width: 520px) {
    .article-hero {
      padding: 2.5rem 0 3.5rem;
    }
    .article-title {
      font-size: 1.5rem;
    }
    .article-meta {
      font-size: 0.6875rem;
    }
    .btn-primary, .btn-outline {
      font-size: 0.8125rem;
      padding: 0.5rem 1rem;
    }
  }

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

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

  .not-found-card {
    background: #fff;
    border-radius: 1.25rem;
    box-shadow: 0 8px 32px rgba(15,23,42,0.08);
    text-align: center;
    padding: 4rem 2rem;
  }

  .not-found-icon {
    font-size: 3.5rem;
    color: #f06500;
    margin-bottom: 1rem;
  }

/* roulang page: category1 */
:root {
            --brand-50: #f0f7ff;
            --brand-100: #e0efff;
            --brand-500: #0a74f5;
            --brand-600: #005ed0;
            --brand-700: #084d9e;
            --brand-800: #0c3d7d;
            --brand-900: #0e3264;
            --accent-400: #fbbf24;
            --accent-500: #f59e0b;
            --accent-600: #d97706;
            --surface: #ffffff;
            --bg-light: #f8fafc;
            --text-primary: #0f172a;
            --text-secondary: #64748b;
            --border-color: #e2e8f0;
            --shadow-card: 0 4px 24px rgba(15, 23, 42, 0.08);
            --shadow-hover: 0 8px 32px rgba(15, 23, 42, 0.14);
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: sans-serif;
            color: var(--text-primary);
            background-color: var(--bg-light);
            line-height: 1.6;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease;
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

        .container-site {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
            box-shadow: 0 1px 8px rgba(15, 23, 42, 0.05);
        }

        .nav-tab {
            display: inline-flex;
            align-items: center;
            padding: 0.55rem 1rem;
            border-radius: 0.75rem;
            font-size: 0.9rem;
            font-weight: 600;
            color: #475569;
            white-space: nowrap;
            transition: all 0.25s ease;
        }

        .nav-tab:hover {
            background: #f1f5f9;
            color: var(--brand-700);
        }

        .nav-tab.active {
            background: linear-gradient(135deg, var(--brand-600), var(--brand-800));
            color: #ffffff;
            box-shadow: 0 4px 16px rgba(0, 94, 208, 0.30);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.65rem 1.5rem;
            border-radius: 0.8rem;
            font-size: 0.92rem;
            font-weight: 700;
            color: #ffffff;
            background: linear-gradient(135deg, var(--brand-600), var(--brand-800));
            box-shadow: 0 4px 16px rgba(0, 94, 208, 0.32);
            transition: all 0.3s ease;
            border: none;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 94, 208, 0.42);
            color: #ffffff;
        }

        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.7rem 1.6rem;
            border-radius: 0.8rem;
            font-size: 0.95rem;
            font-weight: 700;
            color: #0f172a;
            background: linear-gradient(135deg, #fbbf24, #f59e0b);
            box-shadow: 0 4px 16px rgba(245, 158, 11, 0.35);
            transition: all 0.3s ease;
            border: none;
        }

        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 26px rgba(245, 158, 11, 0.45);
            color: #0f172a;
        }

        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.7rem 1.6rem;
            border-radius: 0.8rem;
            font-size: 0.95rem;
            font-weight: 600;
            color: #ffffff;
            border: 1.5px solid rgba(255, 255, 255, 0.7);
            transition: all 0.3s ease;
            background: transparent;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.14);
            color: #ffffff;
            border-color: #ffffff;
        }

        .hamburger {
            width: 42px;
            height: 42px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 0.65rem;
            border: 1px solid var(--border-color);
            background: #ffffff;
            color: var(--brand-700);
            font-size: 1.1rem;
            transition: all 0.25s ease;
        }

        .hamburger:hover {
            background: #f8fafc;
        }

        .mobile-menu {
            display: none;
            padding: 1rem 1.25rem 1.5rem;
            background: #ffffff;
            border-top: 1px solid var(--border-color);
        }

        .mobile-menu.open {
            display: block;
            animation: fadeSlideDown 0.3s ease;
        }

        .mobile-menu .nav-tab {
            display: flex;
            width: 100%;
            padding: 0.8rem 1rem;
            margin-bottom: 0.35rem;
            font-size: 0.98rem;
        }

        @keyframes fadeSlideDown {
            from { opacity: 0; transform: translateY(-8px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* ===== Hero 横幅 ===== */
        .banner-hero {
            position: relative;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-color: #0c3d7d;
            padding: 5rem 0 5.5rem;
            color: #ffffff;
            overflow: hidden;
        }

        .banner-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(115deg, rgba(8, 45, 102, 0.95) 20%, rgba(8, 45, 102, 0.65) 65%, rgba(8, 45, 102, 0.35) 100%);
        }

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

        .breadcrumb-track {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 1.2rem;
            flex-wrap: wrap;
        }

        .breadcrumb-track a:hover {
            color: #fbbf24;
        }

        .stat-block {
            display: flex;
            align-items: center;
            gap: 1.2rem;
            margin-top: 2.5rem;
            padding: 1.25rem 1.75rem;
            border-radius: 1rem;
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.16);
            flex-wrap: wrap;
        }

        .stat-item {
            text-align: center;
            padding: 0.25rem 1rem;
        }

        .stat-item .num {
            font-size: 1.5rem;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -0.02em;
        }

        .stat-item .label {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 0.15rem;
        }

        /* ===== 板块通用 ===== */
        .section-block {
            padding: 4.5rem 0;
        }

        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 3rem;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            padding: 0.35rem 1rem;
            border-radius: 999px;
            font-size: 0.8rem;
            font-weight: 700;
            background: rgba(10, 116, 245, 0.08);
            color: var(--brand-600);
            gap: 0.4rem;
            margin-bottom: 0.8rem;
            letter-spacing: 0.02em;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-primary);
            letter-spacing: -0.02em;
        }

        .section-desc {
            color: var(--text-secondary);
            margin-top: 0.8rem;
            font-size: 1rem;
        }

        /* ===== 卡片 ===== */
        .feature-card {
            background: #ffffff;
            border-radius: var(--radius-xl);
            padding: 2rem 1.6rem;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-color);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
            position: relative;
            overflow: hidden;
        }

        .feature-card::after {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 90px;
            height: 90px;
            border-radius: 50%;
            background: rgba(10, 116, 245, 0.06);
            transition: all 0.4s ease;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }

        .feature-card:hover::after {
            transform: scale(1.5);
        }

        .feature-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 1rem;
            font-size: 1.4rem;
            margin-bottom: 1.2rem;
            position: relative;
            z-index: 1;
        }
        
        .icon-bg-blue {
            background: rgba(10, 116, 245, 0.1);
            color: var(--brand-600);
        }
        
        .icon-bg-amber {
            background: rgba(245, 158, 11, 0.12);
            color: var(--accent-600);
        }
        
        .icon-bg-green {
            background: rgba(16, 185, 129, 0.12);
            color: #059669;
        }
        
        .icon-bg-purple {
            background: rgba(139, 92, 246, 0.12);
            color: #7c3aed;
        }

        .feature-card h3 {
            font-size: 1.1rem;
            font-weight: 800;
            margin-bottom: 0.6rem;
            color: var(--text-primary);
        }

        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* ===== 步骤流程 ===== */
        .steps-section {
            background: linear-gradient(160deg, #0e3264 0%, #084d9e 100%);
            color: #ffffff;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.8rem;
            counter-reset: step;
        }

        .step-card {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: 1.25rem;
            padding: 2rem 1.6rem;
            backdrop-filter: blur(6px);
            transition: background 0.3s ease, transform 0.3s ease;
            position: relative;
            text-align: center;
        }

        .step-card:hover {
            background: rgba(255, 255, 255, 0.14);
            transform: translateY(-4px);
        }

        .step-number {
            width: 48px;
            height: 48px;
            margin: 0 auto 1rem;
            border-radius: 50%;
            background: linear-gradient(135deg, #fbbf24, #f59e0b);
            color: #0f172a;
            font-weight: 800;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
        }

        .step-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .step-card p {
            font-size: 0.87rem;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.6;
        }

        /* ===== 内容卡片 ===== */
        .post-card {
            background: #ffffff;
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .post-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }

        .post-thumb {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
        }

        .post-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.45s ease;
        }

        .post-card:hover .post-thumb img {
            transform: scale(1.05);
        }

        .post-thumb .badge {
            position: absolute;
            top: 0.85rem;
            left: 0.85rem;
            background: linear-gradient(135deg, var(--brand-600), var(--brand-800));
            color: #ffffff;
            font-size: 0.72rem;
            font-weight: 700;
            padding: 0.3rem 0.75rem;
            border-radius: 999px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
        }

        .post-body {
            padding: 1.4rem 1.4rem 1.6rem;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .post-body h3 {
            font-size: 1.05rem;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 0.5rem;
            transition: color 0.25s ease;
        }

        .post-card:hover .post-body h3 {
            color: var(--brand-600);
        }

        .post-body p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
        }

        .post-meta {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            margin-top: 1rem;
            font-size: 0.78rem;
            color: #94a3b8;
        }

        .post-meta .tag-dot {
            display: inline-block;
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: #94a3b8;
        }

        .post-link {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--brand-600);
            margin-top: 0.9rem;
            transition: color 0.2s ease;
        }

        .post-link:hover {
            color: var(--brand-800);
            gap: 0.55rem;
        }

        /* ===== 安全提示 ===== */
        .security-section {
            background: #0f172a;
            position: relative;
            overflow: hidden;
        }

        .security-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(10, 116, 245, 0.12);
        }

        .security-section::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -60px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(245, 158, 11, 0.08);
        }

        .security-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 1.2rem;
            padding: 1.8rem;
            transition: background 0.3s ease, transform 0.3s ease;
            height: 100%;
        }

        .security-card:hover {
            background: rgba(255, 255, 255, 0.09);
            transform: translateY(-3px);
        }

        .security-card .icon-wrap {
            width: 46px;
            height: 46px;
            border-radius: 0.9rem;
            background: rgba(251, 191, 36, 0.15);
            color: #fbbf24;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            margin-bottom: 1rem;
        }

        .security-card h3 {
            color: #ffffff;
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 0.45rem;
        }

        .security-card p {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.86rem;
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 1rem;
            margin-bottom: 0.9rem;
            overflow: hidden;
            transition: box-shadow 0.3s ease;
        }

        .faq-item:hover {
            box-shadow: var(--shadow-card);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.15rem 1.4rem;
            background: transparent;
            border: none;
            font-size: 0.98rem;
            font-weight: 700;
            color: var(--text-primary);
            text-align: left;
            gap: 1rem;
        }

        .faq-question .fa-icon {
            transition: transform 0.3s ease;
            color: var(--brand-600);
            flex-shrink: 0;
            font-size: 0.9rem;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease padding 0.35s ease;
            padding: 0 1.4rem;
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-bottom: 1.1rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            padding: 4.5rem 0;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(8, 45, 102, 0.95) 30%, rgba(8, 45, 102, 0.78) 100%);
        }

        .cta-section .container-site {
            position: relative;
            z-index: 2;
            text-align: center;
            color: #ffffff;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 0.8rem;
            letter-spacing: -0.02em;
        }

        .cta-section p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 2rem;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-actions {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 4rem 0 0;
            margin-top: 0;
        }

        .site-footer h4 {
            font-size: 1rem;
            letter-spacing: 0.01em;
        }

        .site-footer a:hover {
            color: #fbbf24;
        }

        .site-footer .copyright {
            border-top: 1px solid rgba(148, 163, 184, 0.15);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.2rem;
            }

            .section-block {
                padding: 3.5rem 0;
            }
        }

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

            .banner-hero {
                padding: 3.5rem 0 4rem;
            }

            .section-title {
                font-size: 1.5rem;
            }

            .stat-block {
                gap: 0.8rem;
                padding: 1rem 1.2rem;
            }

            .stat-item {
                padding: 0.2rem 0.6rem;
            }

            .stat-item .num {
                font-size: 1.2rem;
            }

            .stat-item .label {
                font-size: 0.72rem;
            }

            .cta-section h2 {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }

            .desktop-tabs {
                display: none;
            }

            .btn-accent,
            .btn-outline-light,
            .btn-primary {
                width: 100%;
                justify-content: center;
            }

            .cta-actions {
                flex-direction: column;
                gap: 0.6rem;
            }

            .banner-hero {
                padding: 2.8rem 0 3.2rem;
            }
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --brand-50: #eff6ff;
            --brand-100: #dbeafe;
            --brand-200: #bfdbfe;
            --brand-500: #3b82f6;
            --brand-600: #2563eb;
            --brand-700: #1d4ed8;
            --brand-800: #1e40af;
            --brand-900: #1e3a8a;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --text-main: #0f172a;
            --text-muted: #64748b;
            --text-weak: #94a3b8;
            --border-color: #e2e8f0;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
            --shadow-md: 0 4px 20px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.14);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg-light);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        input, select, textarea {
            font-family: inherit;
        }
        ul, ol {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container-site {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }
        @media (min-width: 768px) {
            .container-site {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        /* ===== 站点头部 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
        }

        /* ===== 分段标签导航 ===== */
        .desktop-tabs {
            gap: 0.25rem;
            background: #f1f5f9;
            padding: 0.3rem;
            border-radius: 9999px;
        }
        .nav-tab {
            display: inline-flex;
            align-items: center;
            padding: 0.55rem 1.15rem;
            border-radius: 9999px;
            font-size: 0.9rem;
            font-weight: 500;
            color: #475569;
            white-space: nowrap;
            transition: all 0.25s ease;
        }
        .nav-tab i {
            font-size: 0.78rem;
            margin-right: 0.35rem;
        }
        .nav-tab:hover {
            background: rgba(255, 255, 255, 0.8);
            color: var(--brand-700);
        }
        .nav-tab.active {
            background: linear-gradient(135deg, var(--brand-600), var(--brand-800));
            color: #fff;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
        }

        /* ===== 按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.65rem 1.4rem;
            border-radius: 9999px;
            background: linear-gradient(135deg, var(--brand-600), var(--brand-800));
            color: #fff;
            font-size: 0.9rem;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.28);
            transition: all 0.25s ease;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
        }
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.65rem 1.4rem;
            border-radius: 9999px;
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            font-size: 0.9rem;
            font-weight: 500;
            border: 1.5px solid rgba(255, 255, 255, 0.28);
            transition: all 0.25s ease;
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.18);
            border-color: rgba(255, 255, 255, 0.5);
        }
        .btn-light {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.75rem 1.8rem;
            border-radius: 9999px;
            background: #fff;
            color: var(--brand-700);
            font-size: 0.95rem;
            font-weight: 700;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
            transition: all 0.25s ease;
        }
        .btn-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.2);
        }

        /* ===== 汉堡按钮 ===== */
        .hamburger {
            width: 42px;
            height: 42px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 0.75rem;
            background: #f1f5f9;
            color: var(--text-main);
            font-size: 1.1rem;
            transition: all 0.2s ease;
        }
        .hamburger:hover {
            background: #e2e8f0;
        }
        .hamburger:focus-visible {
            outline: 2px solid var(--brand-600);
            outline-offset: 2px;
        }

        /* ===== 移动端菜单 ===== */
        .mobile-menu {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            background: #fff;
            padding: 1rem 1.25rem 1.5rem;
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 16px 32px rgba(15, 23, 42, 0.1);
            border-radius: 0 0 1.25rem 1.25rem;
            flex-direction: column;
            gap: 0.4rem;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu .nav-tab {
            padding: 0.75rem 1rem;
            font-size: 0.95rem;
            border-radius: 0.75rem;
            width: 100%;
        }
        .mobile-menu .nav-tab i {
            font-size: 0.9rem;
            margin-right: 0.5rem;
        }
        .mobile-menu .nav-tab.active {
            background: linear-gradient(135deg, var(--brand-600), var(--brand-800));
            color: #fff;
        }

        /* ===== 页面 Hero ===== */
        .page-hero {
            position: relative;
            overflow: hidden;
            padding: 4.5rem 0 5rem;
        }
        .page-hero .hero-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
        }
        .page-hero .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(15, 23, 42, 0.9) 0%, rgba(30, 27, 75, 0.75) 55%, rgba(37, 99, 235, 0.4) 100%);
        }
        .page-hero .container-site {
            position: relative;
            z-index: 2;
        }
        .breadcrumb {
            display: inline-flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            padding: 0.3rem 1rem;
            border-radius: 9999px;
            margin-bottom: 1.5rem;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.9);
            gap: 0.5rem;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .breadcrumb a:hover {
            color: #fcd34d;
        }
        .breadcrumb .sep {
            opacity: 0.5;
            font-size: 0.7rem;
        }
        .breadcrumb .current {
            color: #fcd34d;
        }

        /* ===== 通用板块标题 ===== */
        .section-header {
            text-align: center;
            max-width: 680px;
            margin-left: auto;
            margin-right: auto;
            margin-bottom: 3rem;
        }
        .section-header .kicker {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--brand-600);
            background: var(--brand-50);
            border-radius: 9999px;
            padding: 0.3rem 1rem;
            margin-bottom: 0.75rem;
            text-transform: uppercase;
        }
        .section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-main);
            margin-bottom: 0.75rem;
        }
        .section-header p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .section-header.light h2 {
            color: #fff;
        }
        .section-header.light p {
            color: rgba(255, 255, 255, 0.75);
        }
        .section-header.light .kicker {
            background: rgba(255, 255, 255, 0.15);
            color: #f8fafc;
        }

        /* ===== 数据卡 ===== */
        .stats-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 1.75rem 1.5rem;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .stats-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--brand-500), var(--brand-700));
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .stats-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--brand-200);
        }
        .stats-card:hover::before {
            opacity: 1;
        }
        .stats-card .stats-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 1rem;
            background: linear-gradient(135deg, var(--brand-50), var(--brand-100));
            color: var(--brand-600);
            font-size: 1.25rem;
            margin-bottom: 1rem;
        }
        .stats-card .stats-value {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.2;
            letter-spacing: -0.02em;
        }
        .stats-card .stats-label {
            margin-top: 0.35rem;
            color: var(--text-muted);
            font-size: 0.88rem;
        }

        /* ===== 特色卡片 ===== */
        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-xl);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: all 0.35s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--brand-200);
        }
        .feature-card .feature-img {
            position: relative;
            overflow: hidden;
            height: 210px;
        }
        .feature-card .feature-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .feature-card:hover .feature-img img {
            transform: scale(1.06);
        }
        .feature-card .feature-img .img-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 23, 42, 0.5), transparent 60%);
        }
        .feature-card .feature-img .feature-tag {
            position: absolute;
            top: 1rem;
            left: 1rem;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            color: var(--brand-700);
            font-size: 0.75rem;
            font-weight: 700;
            padding: 0.3rem 0.85rem;
            border-radius: 9999px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
        }
        .feature-card .feature-body {
            padding: 1.5rem 1.5rem 1.75rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .feature-card .feature-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 0.85rem;
            background: linear-gradient(135deg, var(--brand-600), var(--brand-800));
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 1rem;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
        }
        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
            color: var(--text-main);
        }
        .feature-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.75;
            flex: 1;
        }

        /* ===== 深色安全区 ===== */
        .security-section {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            position: relative;
            overflow: hidden;
        }
        .security-section::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.2), transparent 70%);
        }
        .security-item {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            backdrop-filter: blur(8px);
            transition: all 0.3s ease;
        }
        .security-item:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.2);
            transform: translateY(-3px);
        }
        .security-item .sec-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 1rem;
            background: rgba(37, 99, 235, 0.2);
            color: #93c5fd;
            font-size: 1.2rem;
            margin-bottom: 1rem;
        }
        .security-item h3 {
            color: #fff;
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        .security-item p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.88rem;
            line-height: 1.7;
        }

        /* ===== 流程步骤 ===== */
        .process-card {
            text-align: center;
            position: relative;
        }
        .process-card .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 1.25rem;
            background: linear-gradient(135deg, var(--brand-600), var(--brand-800));
            color: #fff;
            font-size: 1.2rem;
            font-weight: 800;
            margin-bottom: 1.2rem;
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
            position: relative;
            z-index: 2;
        }
        .process-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-main);
        }
        .process-card p {
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.7;
            max-width: 240px;
            margin: 0 auto;
        }
        .process-line {
            display: none;
        }
        @media (min-width: 768px) {
            .process-line {
                display: block;
                position: absolute;
                top: 28px;
                left: calc(50% + 40px);
                right: calc(-50% + 40px);
                border-top: 2px dashed #cbd5e1;
            }
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            margin-bottom: 0.85rem;
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .faq-item:hover {
            border-color: var(--brand-200);
            box-shadow: var(--shadow-sm);
        }
        .faq-item summary {
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.25rem 1.5rem;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-main);
            gap: 1rem;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::before {
            content: '\f059';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--brand-500);
            font-size: 1rem;
            margin-right: 0.25rem;
            flex-shrink: 0;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--text-weak);
            font-size: 0.85rem;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 1.5rem 1.4rem 2.7rem;
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.8;
        }
        .faq-item[open] {
            border-color: var(--brand-200);
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.08);
        }

        /* ===== CTA 区域 ===== */
        .cta-section {
            position: relative;
            overflow: hidden;
        }
        .cta-section .cta-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
        }
        .cta-section .cta-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(30, 27, 75, 0.92), rgba(37, 99, 235, 0.85));
        }
        .cta-box {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 4rem 2rem;
            border-radius: var(--radius-xl);
            border: 1px solid rgba(255, 255, 255, 0.15);
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(12px);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 4rem 0 2rem;
        }
        .site-footer a {
            transition: color 0.2s ease;
        }
        .site-footer a:hover {
            color: #fbbf24;
        }
        .site-footer h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            letter-spacing: 0.02em;
        }

        /* ===== 焦点可见性 ===== */
        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 2px solid var(--brand-600);
            outline-offset: 3px;
            border-radius: 0.25rem;
        }

        /* ===== 响应式调整 ===== */
        @media (max-width: 640px) {
            .page-hero {
                padding: 3rem 0 3.5rem;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .stats-card {
                padding: 1.25rem 1rem;
            }
            .stats-card .stats-value {
                font-size: 1.4rem;
            }
            .feature-card .feature-img {
                height: 180px;
            }
            .faq-item summary {
                padding: 1rem 1.1rem;
                font-size: 0.88rem;
            }
            .faq-item .faq-answer {
                padding: 0 1.1rem 1.1rem 2.2rem;
                font-size: 0.85rem;
            }
        }
        @media (max-width: 380px) {
            .desktop-tabs {
                display: none !important;
            }
        }

/* roulang page: category3 */
/* ========== 设计变量与基础 ========== */
        :root {
            --brand-50: #ecfeff;
            --brand-100: #cffafe;
            --brand-200: #a5f3fc;
            --brand-300: #67e8f9;
            --brand-400: #22d3ee;
            --brand-500: #06b6d4;
            --brand-600: #0891b2;
            --brand-700: #0e7490;
            --brand-800: #155e75;
            --brand-900: #164e63;
            --accent: #f59e0b;
            --accent-600: #d97706;
            --bg-body: #f8fafc;
            --text-main: #0f172a;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
            --radius: 1rem;
            --shadow-sm: 0 1px 3px rgba(15,23,42,.06);
            --shadow-md: 0 6px 20px rgba(15,23,42,.08);
            --shadow-lg: 0 16px 40px rgba(15,23,42,.12);
            --font-main: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--bg-body);
            color: var(--text-main);
            font-family: var(--font-main);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }

        input,
        textarea {
            font-family: inherit;
        }

        /* ========== 容器 ========== */
        .container-site {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* ========== Header / 导航 ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226,232,240,.8);
        }

        .nav-tab {
            display: inline-flex;
            align-items: center;
            gap: .4rem;
            padding: .5rem 1rem;
            border-radius: 9999px;
            font-size: .875rem;
            font-weight: 600;
            color: var(--text-muted);
            transition: all .3s ease;
            white-space: nowrap;
        }

        .nav-tab:hover {
            color: var(--brand-600);
            background: var(--brand-50);
        }

        .nav-tab.active {
            color: var(--brand-700);
            background: var(--brand-100);
            box-shadow: inset 0 0 0 1px rgba(8,145,178,.2);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            padding: .625rem 1.25rem;
            border-radius: 9999px;
            font-weight: 700;
            font-size: .875rem;
            color: #fff;
            background: linear-gradient(135deg, var(--brand-600), var(--brand-800));
            box-shadow: 0 4px 14px rgba(8,145,178,.3);
            transition: all .3s ease;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(8,145,178,.4);
        }

        .btn-primary:focus-visible,
        .btn-secondary:focus-visible,
        .btn-white:focus-visible,
        .btn-ghost:focus-visible,
        .chip-chip:focus-visible,
        .nav-tab:focus-visible,
        .hamburger:focus-visible {
            outline: 3px solid rgba(34,211,238,.5);
            outline-offset: 2px;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            padding: .625rem 1.375rem;
            border-radius: 9999px;
            font-weight: 600;
            font-size: .875rem;
            color: #fff;
            background: rgba(255,255,255,.12);
            border: 1px solid rgba(255,255,255,.25);
            backdrop-filter: blur(8px);
            transition: all .3s ease;
        }

        .btn-secondary:hover {
            background: rgba(255,255,255,.22);
            transform: translateY(-2px);
        }

        .btn-white {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            padding: .75rem 1.5rem;
            border-radius: 9999px;
            font-weight: 700;
            font-size: .875rem;
            color: var(--brand-800);
            background: #fff;
            box-shadow: 0 4px 16px rgba(0,0,0,.12);
            transition: all .3s ease;
        }

        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0,0,0,.18);
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            padding: .75rem 1.5rem;
            border-radius: 9999px;
            font-weight: 600;
            font-size: .875rem;
            color: #fff;
            border: 1px solid rgba(255,255,255,.4);
            transition: all .3s ease;
        }

        .btn-ghost:hover {
            background: rgba(255,255,255,.12);
            border-color: rgba(255,255,255,.7);
            transform: translateY(-2px);
        }

        .hamburger {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 2.5rem;
            height: 2.5rem;
            border-radius: .75rem;
            background: var(--brand-50);
            color: var(--brand-700);
            font-size: 1.125rem;
            transition: all .25s;
        }

        .hamburger:hover {
            background: var(--brand-100);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            gap: .4rem;
            padding: 1rem 1.5rem 1.5rem;
            background: #fff;
            border-top: 1px solid var(--border-color);
        }

        .mobile-menu.open {
            display: flex;
        }

        /* ========== 分类筛选按钮 ========== */
        .chip-chip {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            padding: .625rem 1.25rem;
            border-radius: 9999px;
            border: 1px solid var(--border-color);
            background: #fff;
            color: #475569;
            font-weight: 600;
            font-size: .875rem;
            transition: all .3s ease;
        }

        .chip-chip:hover {
            border-color: var(--brand-300);
            color: var(--brand-600);
            background: var(--brand-50);
            transform: translateY(-2px);
            box-shadow: 0 4px 14px rgba(8,145,178,.08);
        }

        .chip-chip.active {
            border-color: var(--brand-600);
            background: var(--brand-600);
            color: #fff;
            box-shadow: 0 6px 20px rgba(8,145,178,.25);
        }

        .chip-chip span {
            font-size: .75rem;
            padding: .1rem .5rem;
            border-radius: 9999px;
            background: rgba(8,145,178,.1);
            color: var(--brand-700);
            font-weight: 700;
        }

        .chip-chip.active span {
            background: rgba(255,255,255,.22);
            color: #fff;
        }

        /* ========== 问答卡片 ========== */
        .answer-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all .35s ease;
            display: block;
        }

        .answer-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-5px);
            border-color: var(--brand-200);
        }

        .answer-card-top {
            position: relative;
            overflow: hidden;
        }

        .answer-card-top img {
            transition: transform .5s ease;
        }

        .answer-card:hover .answer-card-top img {
            transform: scale(1.06);
        }

        .badge-abs {
            position: absolute;
            top: .75rem;
            left: .75rem;
            padding: .3rem .8rem;
            background: rgba(14,116,144,.9);
            color: #fff;
            font-size: .75rem;
            font-weight: 700;
            border-radius: 9999px;
            backdrop-filter: blur(4px);
            letter-spacing: .02em;
        }

        /* ========== 排行榜 ========== */
        .ranking-item {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 1.25rem 1.5rem;
            background: var(--bg-body);
            border: 1px solid #f1f5f9;
            border-radius: 1rem;
            transition: all .3s ease;
        }

        .ranking-item:hover {
            background: var(--brand-50);
            border-color: var(--brand-200);
            transform: translateX(4px);
            box-shadow: 0 4px 16px rgba(8,145,178,.08);
        }

        .ranking-num {
            font-size: 1.5rem;
            font-weight: 800;
            color: #cbd5e1;
            width: 2.5rem;
            flex-shrink: 0;
            font-family: 'Georgia', 'Times New Roman', serif;
        }

        .ranking-item:nth-child(1) .ranking-num {
            color: #f59e0b;
        }

        .ranking-item:nth-child(2) .ranking-num {
            color: #94a3b8;
        }

        .ranking-item:nth-child(3) .ranking-num {
            color: #d97706;
        }

        .ranking-item:nth-child(4) .ranking-num,
        .ranking-item:nth-child(5) .ranking-num {
            color: #bae6fd;
        }

        .hot-badge {
            font-size: .75rem;
            padding: .3rem .7rem;
            border-radius: 9999px;
            background: #fff7ed;
            color: #ea580c;
            font-weight: 700;
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: .3rem;
        }

        .badge-outline {
            display: inline-flex;
            align-items: center;
            gap: .3rem;
            padding: .4rem .9rem;
            border-radius: 9999px;
            border: 1px solid var(--border-color);
            background: #fff;
            color: var(--text-muted);
            font-size: .8rem;
            font-weight: 600;
        }

        /* ========== 图文指南 ========== */
        .glass-card {
            position: absolute;
            bottom: 1.25rem;
            right: 1.25rem;
            background: rgba(255,255,255,.85);
            backdrop-filter: blur(12px);
            border-radius: 1rem;
            padding: .75rem 1.25rem;
            font-weight: 800;
            font-size: .875rem;
            color: var(--brand-800);
            box-shadow: 0 8px 24px rgba(15,23,42,.14);
        }

        .step-circle {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            width: 2.5rem;
            height: 2.5rem;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--brand-500), var(--brand-700));
            color: #fff;
            font-weight: 800;
            font-size: 1rem;
            box-shadow: 0 4px 12px rgba(8,145,178,.3);
        }

        /* ========== 流程卡片 ========== */
        .process-card {
            background: rgba(255,255,255,.06);
            border: 1px solid rgba(255,255,255,.1);
            border-radius: 1.25rem;
            padding: 1.75rem 1.5rem;
            transition: all .3s ease;
            position: relative;
            backdrop-filter: blur(6px);
        }

        .process-card:hover {
            background: rgba(255,255,255,.12);
            border-color: rgba(255,255,255,.22);
            transform: translateY(-4px);
        }

        .process-num {
            font-size: .8rem;
            font-weight: 800;
            letter-spacing: .15em;
            color: var(--brand-300);
        }

        /* ========== FAQ ========== */
        .faq-item {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 1rem;
            overflow: hidden;
            transition: border-color .3s, box-shadow .3s;
        }

        .faq-item.open {
            border-color: var(--brand-300);
            box-shadow: 0 6px 24px rgba(8,145,178,.08);
        }

        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            padding: 1.25rem 1.5rem;
            font-weight: 700;
            color: var(--text-main);
            text-align: left;
            font-size: .95rem;
            transition: color .2s;
        }

        .faq-question:hover {
            color: var(--brand-600);
        }

        .faq-question i {
            transition: transform .35s ease;
            color: #94a3b8;
            font-size: .85rem;
            flex-shrink: 0;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--brand-600);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease, padding .3s;
            color: var(--text-muted);
            font-size: .9rem;
            line-height: 1.8;
            padding: 0 1.5rem;
        }

        .faq-item.open .faq-answer {
            max-height: 320px;
            padding: 0 1.5rem 1.4rem;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding-top: 4rem;
            padding-bottom: 2.5rem;
        }

        .site-footer a {
            transition: color .25s;
        }

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

        /* ========== 响应式微调 ========== */
        @media (max-width: 768px) {
            .container-site {
                padding: 0 1rem;
            }

            .ranking-item {
                padding: 1rem 1.1rem;
            }

            .ranking-num {
                font-size: 1.25rem;
                width: 2rem;
            }

            .hot-badge {
                font-size: .7rem;
            }

            .glass-card {
                padding: .6rem 1rem;
                font-size: .8rem;
            }

            .faq-question {
                font-size: .875rem;
                padding: 1rem 1.1rem;
            }

            .faq-answer {
                padding: 0 1.1rem;
            }

            .faq-item.open .faq-answer {
                padding: 0 1.1rem 1.1rem;
            }
        }

        @media (max-width: 520px) {
            .container-site {
                padding: 0 .8rem;
            }

            .process-card {
                padding: 1.4rem 1.2rem;
            }

            .btn-primary,
            .btn-secondary,
            .btn-white,
            .btn-ghost {
                padding: .6rem 1.1rem;
                font-size: .82rem;
            }
        }