:root {
    --primary: #0891b2;
    --accent: #0ea5e9;
    --bg: #ecfeff;
    --text: #083344;
    --radius: 8px;
    --shadow: 0 2px 8px rgba(8, 145, 178, 0.06);
    --border: #d5f0f5;
  }
  body {
    background-color: var(--bg);
    color: var(--text);
    font-family: 'Inter', '思源黑体', 'Noto Sans SC', sans-serif;
    font-size: 14px;
    line-height: 1.75;
    letter-spacing: 0.01em;
    overflow-x: hidden;
  }
  /* 思源宋体标题 */
  h1, h2, h3, h4, .serif-title {
    font-family: 'Source Han Serif SC', '思源宋体', 'Noto Serif SC', serif;
    font-weight: 600;
  }
  /* 点阵背景 */
  body::before {
    content: '';
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-image: radial-gradient(var(--primary) 0.5px, transparent 0.5px);
    background-size: 24px 24px;
    opacity: 0.04;
    pointer-events: none;
    z-index: 0;
  }
  .container { position: relative; z-index: 1; max-width: 960px; }

  /* 导航栏 */
  .navbar-custom {
    background: rgba(236, 254, 255, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    transition: all 0.3s ease;
    padding-top: 12px;
    padding-bottom: 12px;
  }
  .navbar-custom.scrolled {
    background: rgba(236, 254, 255, 0.95);
    box-shadow: 0 2px 20px rgba(8, 145, 178, 0.1);
  }
  .navbar-brand {
    font-family: '思源宋体', serif;
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--text) !important;
    letter-spacing: 0.08em;
  }
  .navbar-brand i { color: var(--primary); margin-right: 6px; }
  .navbar-nav .nav-link {
    color: var(--text);
    font-weight: 500;
    padding: 6px 14px;
    font-size: 13.5px;
    transition: color 0.2s;
  }
  .navbar-nav .nav-link:hover { color: var(--primary); }
  .navbar-toggler { border: none; font-size: 1.2rem; color: var(--text); }
  .navbar-toggler:focus { box-shadow: none; }

  /* 区块间距 */
  section { padding: 56px 0; }
  .section-label {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 8px;
  }
  .section-title {
    font-size: 1.9rem;
    margin-bottom: 12px;
    color: var(--text);
  }
  .section-sub { font-size: 14px; color: #5b8a9a; max-width: 640px; }

  /* Hero */
  .hero {
    padding: 90px 0 60px;
    text-align: center;
    position: relative;
  }
  .hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
    margin-bottom: 30px;
  }
  .hero-stat {
    text-align: center;
  }
  .stat-number {
    font-family: 'Inter', sans-serif;
    font-size: 3.2rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.1;
    display: block;
    min-width: 100px;
  }
  .stat-label {
    font-size: 13px;
    color: #5b8a9a;
    font-weight: 500;
  }
  .hero-title {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 14px;
  }
  .hero-sub {
    font-size: 16px;
    color: #5b8a9a;
    max-width: 600px;
    margin: 0 auto 30px;
  }
  .btn-primary-custom {
    background: var(--primary);
    border: none;
    color: #fff;
    padding: 12px 32px;
    border-radius: var(--radius);
    font-weight: 600;
    transition: all 0.2s;
  }
  .btn-primary-custom:hover {
    background: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(8, 145, 178, 0.25);
    color: #fff;
  }

  /* 分隔线 */
  .divider {
    width: 100%;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--border), transparent);
    margin: 0;
  }

  /* 统计区块 */
  .stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 24px;
    text-align: center;
    padding: 24px 0;
  }
  .stat-item {
    background: #fff;
    border-radius: var(--radius);
    padding: 24px 16px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: transform 0.25s, border-color 0.25s;
  }
  .stat-item:hover {
    transform: scale(1.02);
    border-color: var(--primary);
  }
  .stat-value {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--primary);
    font-family: 'Inter', sans-serif;
    display: block;
  }
  .stat-desc { font-size: 13px; color: #5b8a9a; }

  /* 说明手风琴 */
  .accordion-custom {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 16px;
    box-shadow: var(--shadow);
  }
  .accordion-toggle {
    width: 100%;
    background: none;
    border: none;
    padding: 18px 20px;
    text-align: left;
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.2s;
  }
  .accordion-toggle:hover { background: #f0fcfe; }
  .accordion-toggle i { color: var(--primary); font-size: 14px; transition: transform 0.3s; }
  .accordion-toggle[aria-expanded="true"] i { transform: rotate(180deg); }
  .accordion-content {
    padding: 0 20px 20px;
    font-size: 14px;
    color: #5b8a9a;
    line-height: 1.8;
  }

  /* 特色卡片 */
  .feature-card {
    background: #fff;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 28px 22px;
    height: 100%;
    transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
    box-shadow: var(--shadow);
  }
  .feature-card:hover {
    transform: scale(1.02);
    border-color: var(--primary);
    box-shadow: 0 4px 16px rgba(8, 145, 178, 0.12);
  }
  .feature-icon {
    width: 44px;
    height: 44px;
    background: var(--bg);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    color: var(--primary);
    font-size: 1.1rem;
  }
  .feature-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text);
  }
  .feature-desc { font-size: 13px; color: #5b8a9a; }

  /* FAQ */
  .faq-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 22px;
    margin-bottom: 12px;
    box-shadow: var(--shadow);
  }
  .faq-q {
    font-weight: 600;
    font-size: 15px;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
  }
  .faq-q i { color: var(--primary); margin-right: 10px; font-size: 13px; }
  .faq-a { font-size: 13.5px; color: #5b8a9a; padding-left: 24px; }

  /* CTA */
  .cta-block {
    background: linear-gradient(135deg, var(--bg) 0%, #d5f0f5 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 50px 30px;
    text-align: center;
    box-shadow: var(--shadow);
  }
  .cta-block h2 { font-size: 2rem; }
  .cta-block p { color: #5b8a9a; max-width: 480px; margin: 12px auto 28px; }

  /* 友链 */
  .friend-links {
    border-top: 1px solid var(--border);
    padding-top: 32px;
    margin-top: 24px;
  }
  .friend-links h5 {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--primary);
    text-transform: uppercase;
    margin-bottom: 12px;
  }
  .friend-links a {
    color: #5b8a9a;
    text-decoration: none;
    font-size: 13px;
    margin: 0 12px 6px 0;
    display: inline-block;
  }
  .friend-links a:hover { color: var(--primary); }

  /* 页脚 */
  footer {
    border-top: 1px solid var(--border);
    padding: 28px 0 40px;
    font-size: 13px;
    color: #5b8a9a;
  }
  footer .brand { font-size: 1.2rem; font-weight: 700; color: var(--text); font-family: '思源宋体', serif; }

  /* 移动端 */
  @media (max-width: 768px) {
    .hero { padding: 60px 0 40px; }
    .hero-title { font-size: 2rem; }
    .stat-number { font-size: 2.2rem; }
    .section-title { font-size: 1.5rem; }
    .navbar-brand { font-size: 1.2rem; }
  }

/* --- 子页面追加 --- */
/* 关于页专属小样式 —— 程序会自动合并进站点CSS */
        .about-hero { padding: 3rem 0 1.5rem; }
.about-section { padding: 2rem 0; }
.about-card { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; margin-bottom: 1.5rem; }
.about-icon { color: var(--primary); font-size: 1.5rem; margin-bottom: .75rem; }
.timeline-item { display: flex; gap: 1rem; margin-bottom: 1.25rem; }
.timeline-dot { width: 10px; height: 10px; background: var(--primary); border-radius: 50%; margin-top: .5rem; flex-shrink: 0; }
.timeline-content { flex: 1; }
.value-list li { margin-bottom: .5rem; list-style: none; padding-left: 1.5rem; position: relative; }
.value-list li::before { content: '\f00c'; font-family: 'Font Awesome 6 Free'; font-weight: 900; color: var(--primary); position: absolute; left: 0; }
.nav-link.active { color: var(--primary) !important; font-weight: 600; }
.about-quote { border-left: 4px solid var(--primary); padding-left: 1.25rem; font-style: italic; color: var(--text); margin: 1.5rem 0; }
.stat-mini { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem; text-align: center; }
.stat-mini .num { font-size: 1.75rem; font-weight: 700; color: var(--primary); }
.stat-mini .label { font-size: .875rem; color: var(--text); opacity: .75; }

/* --- 子页面追加 --- */
/* 确保隐私政策页内文字与站点风格一致，同时优化阅读性 */
    .privacy-hero {
      background: linear-gradient(135deg, rgba(8,145,178,0.08) 0%, rgba(14,165,233,0.05) 100%);
      border-bottom: 1px solid var(--border);
    }
.privacy-section {
      background: rgba(255,255,255,0.35);
      backdrop-filter: blur(2px);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 2rem 1.8rem;
      margin-bottom: 2rem;
      box-shadow: var(--shadow);
    }
.privacy-section h2 {
      font-weight: 700;
      font-size: 1.6rem;
      color: var(--primary);
      letter-spacing: -0.02em;
      margin-bottom: 1.2rem;
      display: flex;
      align-items: center;
      gap: 0.6rem;
    }
.privacy-section h2 i {
      color: var(--accent);
      font-size: 1.4rem;
    }
.privacy-section p, .privacy-section li {
      color: var(--text);
      line-height: 1.8;
      font-size: 0.98rem;
    }
.privacy-section ul, .privacy-section ol {
      padding-left: 1.2rem;
      margin-bottom: 1rem;
    }
.privacy-section li {
      margin-bottom: 0.5rem;
    }
.privacy-highlight {
      background: rgba(8,145,178,0.06);
      border-left: 4px solid var(--primary);
      padding: 1rem 1.4rem;
      border-radius: 0 var(--radius) var(--radius) 0;
      margin: 1.5rem 0;
    }
.privacy-highlight p {
      margin-bottom: 0.5rem;
      font-weight: 500;
    }
.btn-back-home {
      background: var(--primary);
      color: #fff;
      padding: 0.7rem 2rem;
      border-radius: 60px;
      font-weight: 600;
      transition: all 0.2s ease;
      display: inline-block;
      text-decoration: none;
    }
.btn-back-home:hover {
      background: #066a85;
      transform: translateY(-2px);
      box-shadow: 0 6px 14px rgba(8,145,178,0.2);
      color: #fff;
    }
.footer-links a {
      color: var(--text);
      opacity: 0.8;
      text-decoration: none;
      margin: 0 0.8rem;
    }
.footer-links a:hover {
      opacity: 1;
      color: var(--primary);
    }
/* 确保导航栏高亮当前页 */
    .navbar-nav .nav-link.active-privacy {
      font-weight: 700;
      color: var(--primary) !important;
      border-bottom: 2px solid var(--primary);
    }
.privacy-section {
        padding: 1.5rem 1.2rem;
      }

/* --- 子页面追加 --- */
/* 确保卡片/表单等Bootstrap组件融入云漫配色 */
    .card, .card-body, .card-title, .card-text, .card-header, .card-footer {
      background: var(--bg);
      color: var(--text);
      border-color: var(--border);
    }
.list-group-item {
      background: var(--bg);
      color: var(--text);
      border-color: var(--border);
    }
.accordion-item, .accordion-button, .accordion-body {
      background: var(--bg);
      color: var(--text);
      border-color: var(--border);
    }
.accordion-button:not(.collapsed) {
      background: rgba(8, 145, 178, 0.08);
      color: var(--primary);
    }
.accordion-button::after {
      filter: invert(20%);
    }
.form-control {
      background: rgba(8, 145, 178, 0.04);
      color: var(--text);
      border: 1px solid var(--border);
    }
.form-control:focus {
      background: rgba(8, 145, 178, 0.08);
      color: var(--text);
      border-color: var(--primary);
      box-shadow: 0 0 0 0.2rem rgba(8, 145, 178, 0.1);
    }
.btn-outline-primary {
      border-color: var(--primary);
      color: var(--primary);
    }
.btn-outline-primary:hover {
      background: var(--primary);
      color: #fff;
    }
/* 条款页细节 */
    .terms-section {
      margin-bottom: 2.5rem;
    }
.terms-section h2 {
      font-weight: 600;
      color: var(--primary);
      border-left: 4px solid var(--primary);
      padding-left: 1rem;
      margin-bottom: 1.5rem;
    }
.terms-section p, .terms-section li {
      line-height: 1.75;
      color: var(--text);
    }
.terms-section ul, .terms-section ol {
      padding-left: 1.5rem;
      margin-bottom: 1.2rem;
    }
.legal-note {
      background: rgba(8, 145, 178, 0.05);
      border-radius: var(--radius);
      padding: 1.2rem 1.5rem;
      border: 1px solid var(--border);
      font-size: 0.95rem;
    }
.highlight-legal {
      color: var(--primary);
      font-weight: 500;
    }