/* roulang page: index */
:root {
    --primary: #1e3a8a;
    --primary-dark: #172554;
    --primary-light: #3b82f6;
    --accent: #f59e0b;
    --bg: #f8fafc;
    --text: #1e293b;
    --text-weak: #64748b;
    --border: #e2e8f0;
    --radius: 14px;
    --shadow-sm: 0 2px 8px rgba(30, 58, 138, 0.06);
    --shadow-md: 0 10px 30px rgba(30, 58, 138, 0.1);
    --shadow-lg: 0 24px 48px rgba(30, 58, 138, 0.14);
    --transition: 0.3s ease;
  }

  * {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    margin: 0;
    -webkit-font-smoothing: antialiased;
  }

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

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

  button, input {
    font-family: inherit;
  }

  .container {
    width: 100%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
  }

  @media (min-width: 640px) {
    .container { padding-left: 1.5rem; padding-right: 1.5rem; }
  }

  @media (min-width: 1024px) {
    .container { padding-left: 2rem; padding-right: 2rem; }
  }

  /* ---- 导航 ---- */
  .site-header {
    transition: box-shadow var(--transition), background var(--transition);
  }

  .site-header.scrolled {
    box-shadow: 0 4px 20px rgba(30, 58, 138, 0.08);
  }

  .nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-weak);
    border-radius: 9999px;
    transition: all var(--transition);
  }

  .nav-link:hover {
    color: var(--primary);
    background: rgba(30, 58, 138, 0.06);
  }

  .nav-link.active {
    color: var(--primary);
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.1), rgba(59, 130, 246, 0.06));
    font-weight: 600;
  }

  .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0.2rem;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 3px;
    border-radius: 9999px;
    background: var(--accent);
  }

  .logo-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    font-weight: 800;
    font-size: 1.1rem;
    box-shadow: 0 4px 12px rgba(30, 58, 138, 0.3);
  }

  /* ---- 按钮 ---- */
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    border-radius: 9999px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(30, 58, 138, 0.28);
    transition: all var(--transition);
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(30, 58, 138, 0.35);
    filter: brightness(1.05);
  }

  .btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(30, 58, 138, 0.2);
  }

  .btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    font-weight: 600;
    font-size: 0.95rem;
    border: 1.5px solid rgba(255, 255, 255, 0.4);
    cursor: pointer;
    backdrop-filter: blur(4px);
    transition: all var(--transition);
  }

  .btn-outline:hover {
    background: rgba(255, 255, 255, 0.22);
    border-color: rgba(255, 255, 255, 0.7);
    transform: translateY(-2px);
  }

  .btn-outline-light {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    border-radius: 9999px;
    background: transparent;
    color: var(--primary);
    font-weight: 600;
    font-size: 0.95rem;
    border: 1.5px solid var(--primary);
    cursor: pointer;
    transition: all var(--transition);
  }

  .btn-outline-light:hover {
    background: rgba(30, 58, 138, 0.06);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(30, 58, 138, 0.1);
  }

  /* ---- 卡片 ---- */
  .feature-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 2rem 1.75rem;
    border: 1px solid var(--border);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
  }

  .feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    opacity: 0;
    transition: opacity var(--transition);
  }

  .feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: rgba(30, 58, 138, 0.15);
  }

  .feature-card:hover::before {
    opacity: 1;
  }

  .category-card {
    background: #fff;
    border-radius: 18px;
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
  }

  .category-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(30, 58, 138, 0.15);
  }

  .news-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 1.5rem;
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    height: 100%;
    transition: all var(--transition);
  }

  .news-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: rgba(30, 58, 138, 0.15);
  }

  .news-card-title {
    font-size: 1.05rem;
    font-weight: 600;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .news-card-desc {
    font-size: 0.9rem;
    color: var(--text-weak);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  /* ---- 徽章 ---- */
  .badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    background: rgba(30, 58, 138, 0.08);
    color: var(--primary);
    border: 1px solid rgba(30, 58, 138, 0.1);
  }

  .badge-accent {
    background: rgba(245, 158, 11, 0.1);
    color: #b45309;
    border-color: rgba(245, 158, 11, 0.2);
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1.1rem;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: #fff;
    font-size: 0.85rem;
    font-weight: 500;
    backdrop-filter: blur(6px);
  }

  /* ---- 流程步骤 ---- */
  .step-item {
    position: relative;
    background: #fff;
    border-radius: var(--radius);
    padding: 1.75rem 1.5rem;
    border: 1px solid var(--border);
    transition: all var(--transition);
  }

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

  .step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    font-size: 1.1rem;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(30, 58, 138, 0.25);
  }

  /* ---- FAQ ---- */
  .faq-item {
    background: #fff;
    border-radius: 14px;
    border: 1px solid var(--border);
    overflow: hidden;
    transition: box-shadow var(--transition);
  }

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

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

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

  .faq-icon {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(30, 58, 138, 0.08);
    color: var(--primary);
    font-size: 1.1rem;
    transition: all var(--transition);
  }

  .faq-item.open .faq-icon {
    transform: rotate(45deg);
    background: var(--primary);
    color: #fff;
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
  }

  .faq-answer-inner {
    padding: 0 1.5rem 1.25rem;
    font-size: 0.92rem;
    color: var(--text-weak);
    line-height: 1.75;
  }

  /* ---- 图文展示 ---- */
  .showcase-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
    align-items: center;
  }

  @media (max-width: 768px) {
    .showcase-grid {
      grid-template-columns: 1fr;
      gap: 2rem;
    }
  }

  .showcase-img {
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition);
  }

  .showcase-img:hover {
    transform: scale(1.02);
  }

  /* ---- 页脚 ---- */
  .footer-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: rgba(226, 232, 240, 0.75);
    font-size: 0.9rem;
    padding: 0.25rem 0;
    transition: all var(--transition);
  }

  .footer-link:hover {
    color: #fff;
    transform: translateX(4px);
  }

  .footer-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: #fff;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
    text-transform: uppercase;
  }

  /* ---- 占位空状态 ---- */
  .empty-box {
    background: #fff;
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    padding: 3rem 2rem;
    text-align: center;
    color: var(--text-weak);
    font-size: 0.98rem;
  }

  /* ---- 锚点偏移修正 ---- */
  .anchor-offset {
    scroll-margin-top: 90px;
  }

  /* ---- 焦点可见性 ---- */
  a:focus-visible,
  button:focus-visible {
    outline: 3px solid rgba(59, 130, 246, 0.5);
    outline-offset: 2px;
    border-radius: 8px;
  }

  /* ---- 移动端菜单 ---- */
  .mobile-menu {
    transition: all 0.3s ease;
    border-radius: 0 0 20px 20px;
  }

  /* 头像圆形样式 */
  .avatar-ring {
    border: 2px solid rgba(255, 255, 255, 0.3);
  }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --primary-light: #e0e7ff;
            --accent: #0ea5e9;
            --background: #f8fafc;
            --text: #0f172a;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
            --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 20px 40px rgba(15, 23, 42, 0.09);
        }

        /* ===== 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: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background-color: var(--background);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
        }

        img { max-width: 100%; display: block; }
        a { text-decoration: none; color: inherit; }
        button { font-family: inherit; cursor: pointer; background: none; border: none; }
        ul, ol { list-style: none; }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ===== Logo ===== */
        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 18px;
            font-weight: 800;
            box-shadow: 0 4px 10px rgba(99, 102, 241, 0.25);
            flex-shrink: 0;
        }

        /* ===== 导航 ===== */
        .site-header {
            transition: box-shadow .3s ease, background .3s ease;
        }
        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(15, 23, 42, 0.07);
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            padding: 8px 14px;
            border-radius: 10px;
            color: #475569;
            transition: all .25s ease;
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-link.active {
            color: var(--primary);
            background: #eef2ff;
            font-weight: 600;
        }

        .mobile-menu {
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            box-shadow: 0 12px 30px rgba(15, 23, 42, 0.1);
            border-radius: 0 0 16px 16px;
            z-index: 100;
        }
        .mobile-menu.show {
            display: block;
        }
        .mobile-menu .nav-link {
            border-radius: 10px;
            font-size: 15px;
        }

        /* ===== 按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            background: var(--primary);
            color: #fff;
            padding: 12px 24px;
            border-radius: 12px;
            font-weight: 600;
            font-size: 15px;
            transition: all .25s ease;
            box-shadow: 0 4px 14px rgba(99, 102, 241, 0.25);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(99, 102, 241, 0.32);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(99, 102, 241, 0.2);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            background: transparent;
            color: var(--primary);
            border: 1.5px solid #c7d2fe;
            padding: 12px 24px;
            border-radius: 12px;
            font-weight: 600;
            font-size: 15px;
            transition: all .25s ease;
        }
        .btn-outline:hover {
            background: var(--primary-light);
            border-color: var(--primary);
        }

        /* ===== 卡片 ===== */
        .card {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: all .3s ease;
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: #c7d2fe;
        }

        /* ===== 标签 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            background: var(--primary-light);
            color: var(--primary-dark);
        }

        .step-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 700;
        }

        /* ===== Hero ===== */
        .hero-banner {
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .hero-banner::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(90deg, rgba(15,23,42,0.92), rgba(15,23,42,0.65) 55%, rgba(15,23,42,0.35));
            border-radius: inherit;
        }
        .hero-content {
            position: relative;
            z-index: 2;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-item {
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb-item a:hover {
            color: var(--primary);
        }
        .breadcrumb-separator {
            margin: 0 8px;
            color: #cbd5e1;
        }

        /* ===== 板块标题 ===== */
        .section-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 16px;
            background: #eef2ff;
            color: var(--primary-dark);
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.3px;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: clamp(26px, 4vw, 36px);
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.5px;
            color: var(--text);
        }
        .section-subtitle {
            color: var(--text-muted);
            font-size: 16px;
            line-height: 1.7;
            max-width: 640px;
        }

        /* ===== 优点特征图标 ===== */
        .feature-icon {
            width: 50px;
            height: 50px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 20px;
            transition: all .3s ease;
        }
        .feature-card:hover .feature-icon {
            background: var(--primary);
            color: #fff;
            transform: scale(1.05);
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 14px;
            transition: all .25s ease;
        }
        .faq-item:hover {
            border-color: #c7d2fe;
            box-shadow: var(--shadow-sm);
        }
        .faq-item summary {
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            padding: 18px 22px;
            list-style: none;
            position: relative;
            padding-right: 44px;
            color: var(--text);
        }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item summary::after {
            content: "+";
            position: absolute;
            right: 18px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 22px;
            color: var(--primary);
            font-weight: 400;
            transition: transform .25s ease;
        }
        .faq-item[open] summary::after {
            transform: translateY(-50%) rotate(45deg);
        }
        .faq-item .faq-content {
            padding: 0 22px 18px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.75;
        }

        /* ===== 漏斗/数据块 ===== */
        .stat-card {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 28px 24px;
            text-align: center;
            transition: all .3s ease;
        }
        .stat-card:hover {
            border-color: #c7d2fe;
            box-shadow: var(--shadow-md);
        }
        .stat-number {
            font-size: 34px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-label {
            color: var(--text-muted);
            font-size: 14px;
            margin-top: 6px;
        }

        /* ===== 表格 ===== */
        .guide-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            background: #fff;
            border-radius: 14px;
            overflow: hidden;
            border: 1px solid var(--border);
        }
        .guide-table th {
            background: #f8fafc;
            padding: 14px 18px;
            text-align: left;
            font-weight: 600;
            font-size: 14px;
            color: var(--text);
            border-bottom: 1px solid var(--border);
        }
        .guide-table td {
            padding: 14px 18px;
            border-bottom: 1px solid #f1f5f9;
            font-size: 14px;
            color: #475569;
        }
        .guide-table tr:last-child td {
            border-bottom: none;
        }

        /* ===== 提示框 ===== */
        .tip-box {
            background: #f0f9ff;
            border-left: 4px solid var(--accent);
            border-radius: 0 12px 12px 0;
            padding: 18px 20px;
        }
        .warning-box {
            background: #fffbeb;
            border-left: 4px solid #f59e0b;
            border-radius: 0 12px 12px 0;
            padding: 18px 20px;
        }

        /* ===== 页脚 ===== */
        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: #e2e8f0;
            margin-bottom: 16px;
            letter-spacing: 0.2px;
        }
        .footer-link {
            font-size: 14px;
            color: #94a3b8;
            transition: all .2s ease;
        }
        .footer-link:hover {
            color: #a5b4fc;
            padding-left: 4px;
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar { width: 9px; height: 9px; }
        ::-webkit-scrollbar-track { background: #f1f5f9; }
        ::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 6px; }
        ::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

        /* ===== focus 可访问性 ===== */
        a:focus-visible, button:focus-visible, summary:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .btn-primary:focus-visible, .btn-outline:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

        /* ===== 响应式断点 ===== */
        @media (max-width: 768px) {
            .section-subtitle { font-size: 15px; }
            .guide-table { display: block; overflow-x: auto; }
            .container { padding-left: 16px; padding-right: 16px; }
        }
        @media (max-width: 520px) {
            .stat-number { font-size: 28px; }
            .hero-banner { background-position: 70% center; }
            .faq-item summary { font-size: 15px; padding: 16px 40px 16px 18px; }
            .faq-item .faq-content { padding: 0 18px 16px; }
        }

        /* ===== 分享图标鼠标效果 ===== */
        .social-icon {
            transition: color .2s ease, transform .2s ease;
        }
        .social-icon:hover {
            transform: translateY(-3px);
        }

/* roulang page: article */
:root {
  --primary: #0f766e;
  --primary-dark: #115e59;
  --primary-light: #ccfbf1;
  --accent: #f59e0b;
  --bg: #f7f8fa;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --radius: 18px;
  --shadow-sm: 0 4px 12px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 12px 30px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 24px 50px rgba(15, 23, 42, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Inter', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text-main);
  line-height: 1.7;
}

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

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

button {
  cursor: pointer;
}

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

.logo-mark {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, #0f766e, #134e4a);
  color: #fff;
  font-weight: 800;
  font-size: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 16px rgba(15, 118, 110, 0.25);
}

.site-header {
  box-shadow: 0 2px 20px rgba(15, 23, 42, 0.05);
}

.nav-link {
  padding: 9px 18px;
  border-radius: 999px;
  color: #64748b;
  font-weight: 600;
  font-size: 14px;
  transition: all .25s ease;
  border: 1px solid transparent;
}

.nav-link:hover {
  color: var(--primary);
  background: #e2f4f3;
}

.nav-link.active {
  color: var(--primary);
  background: #d1f2ef;
  box-shadow: 0 2px 8px rgba(15, 118, 110, 0.12);
}

.mobile-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  box-shadow: 0 20px 30px rgba(15, 23, 42, 0.10);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  transition: all .25s ease;
  box-shadow: 0 8px 20px rgba(15, 118, 110, 0.22);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(15, 118, 110, 0.28);
}

.btn-primary:focus-visible {
  outline: 3px solid rgba(245, 158, 11, 0.5);
  outline-offset: 2px;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 999px;
  background: #fff;
  color: var(--primary);
  border: 1.5px solid var(--border);
  font-weight: 600;
  font-size: 14px;
  transition: all .25s ease;
}

.btn-outline:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.article-hero {
  position: relative;
  padding: 56px 0 72px;
  background: linear-gradient(135deg, rgba(4, 47, 46, 0.92) 0%, rgba(15, 118, 110, 0.75) 100%), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
  color: #fff;
  overflow: hidden;
}

.category-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
}

.article-content {
  font-size: 16px;
  line-height: 1.9;
  color: #1e293b;
}

.article-content h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 32px 0 16px;
  color: #0f172a;
  letter-spacing: -0.3px;
}

.article-content h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 24px 0 12px;
  color: #0f172a;
}

.article-content p {
  margin: 0 0 18px;
}

.article-content ul {
  margin: 0 0 20px 20px;
  list-style: disc;
}

.article-content ol {
  margin: 0 0 20px 20px;
  list-style: decimal;
}

.article-content li {
  margin-bottom: 8px;
}

.article-content img {
  border-radius: var(--radius);
  margin: 20px 0;
  box-shadow: var(--shadow-md);
}

.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: #f0fdfa;
  padding: 16px 20px;
  border-radius: 8px;
  margin: 20px 0;
  font-style: normal;
}

.article-content a {
  color: var(--primary);
  font-weight: 600;
  border-bottom: 1px dashed #0f766e;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 15px;
}

.article-content th, .article-content td {
  border: 1px solid var(--border);
  padding: 12px 14px;
  text-align: left;
}

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

.sidebar-card {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.sidebar-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 12px;
  position: relative;
}

.sidebar-title::after {
  content: '';
  display: block;
  width: 36px;
  height: 3px;
  background: var(--primary);
  border-radius: 4px;
  margin-top: 8px;
}

.step-list-item {
  display: flex;
  gap: 14px;
  padding: 14px 16px;
  background: #f8fafc;
  border-radius: 12px;
  margin-bottom: 10px;
  align-items: flex-start;
}

.step-num {
  width: 28px;
  height: 28px;
  flex: none;
  border-radius: 8px;
  background: #d1f2ef;
  color: var(--primary);
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  background: #e2f4f3;
  color: var(--primary);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.5px;
}

.share-btn {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  border: 1px solid var(--border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #64748b;
  transition: all .25s ease;
  background: #fff;
}

.share-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.related-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--primary);
  background: #e2f4f3;
  border-radius: 999px;
  padding: 4px 12px;
  font-weight: 600;
}

.related-card {
  background: #fff;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all .35s ease;
}

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

.related-card .related-cover {
  position: relative;
  height: 180px;
  overflow: hidden;
}

.related-card .related-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}

.related-card:hover .related-cover img {
  transform: scale(1.06);
}

.related-card-body {
  padding: 20px;
}

.step-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 28px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all .3s ease;
}

.step-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(15, 118, 110, 0.3);
}

.step-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto;
  border-radius: 16px;
  background: linear-gradient(135deg, #0f766e, #134e4a);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 16px;
  box-shadow: 0 8px 16px rgba(15, 118, 110, 0.25);
}

.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow .25s ease;
}

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

.faq-item summary {
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  cursor: pointer;
  font-weight: 600;
  color: #0f172a;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary .fa-chevron-down {
  transition: transform .25s ease;
  color: var(--primary);
}

.faq-item[open] summary .fa-chevron-down {
  transform: rotate(180deg);
}

.faq-body {
  padding: 0 24px 22px;
  color: var(--text-muted);
  line-height: 1.8;
}

.footer-title {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.footer-link {
  color: #94a3b8;
  font-size: 14px;
  transition: all .25s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.footer-link:hover {
  color: #fff;
  transform: translateX(4px);
}

.not-found-wrap {
  padding: 90px 0 70px;
}