:root {
  --primary: #64748b;
  --accent: #94a3b8;
  --bg: #f1f5f9;
  --text: #1e293b;
  --text-light: #64748b;
  --border: #e2e8f0;
  --shadow-sm: 0 2px 8px rgba(30, 41, 59, 0.06);
  --shadow-md: 0 6px 24px rgba(30, 41, 59, 0.08);
  --radius: 8px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  background-image: radial-gradient(var(--border) 1px, transparent 1px);
  background-size: 24px 24px;
}
a { text-decoration: none; color: inherit; }

/* 滚动进度条 */
.progress-bar-fixed {
  position: fixed; top: 0; left: 0; height: 3px;
  width: 0%; background: var(--primary); z-index: 9999;
  transition: width 0.1s linear;
}

/* 导航 */
.navbar-custom {
  background: rgba(241, 245, 249, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 999;
  padding: 0.6rem 0;
}
.navbar-custom .navbar-brand {
  font-weight: 900; font-size: 1.5rem; color: var(--text);
  display: flex; align-items: center; gap: 0.5rem;
}
.navbar-custom .navbar-brand i { color: var(--primary); font-size: 1.8rem; }
.navbar-custom .nav-link {
  font-weight: 600; color: var(--text-light); font-size: 0.95rem;
  padding: 0.5rem 1rem !important; border-radius: var(--radius);
  transition: all 0.2s;
}
.navbar-custom .nav-link:hover { color: var(--primary); background: rgba(100, 116, 139, 0.08); }

/* Hero */
.hero-section {
  padding: 5rem 0 4rem;
  text-align: center;
  position: relative;
}
.hero-section .badge-new { background: var(--primary); color: #fff; font-size: 0.8rem; padding: 0.4rem 1rem; border-radius: 30px; font-weight: 600; letter-spacing: 0.5px; }
.hero-title {
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 900;
  color: var(--text);
  margin: 1.5rem 0 1rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.hero-title span { color: var(--primary); }
.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-light);
  max-width: 680px;
  margin: 0 auto 2.5rem;
  font-weight: 400;
}
.hero-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.btn-custom {
  padding: 0.85rem 2.4rem;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 1rem;
  transition: all 0.2s;
  border: none;
}
.btn-primary-custom { background: var(--primary); color: #fff; box-shadow: var(--shadow-md); }
.btn-primary-custom:hover { background: #55657c; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(100, 116, 139, 0.3); }
.btn-outline-custom { background: transparent; color: var(--text); border: 2px solid var(--border); }
.btn-outline-custom:hover { border-color: var(--primary); color: var(--primary); }

/* 特色卡片 */
.section-cards { padding: 4rem 0; }
.section-title { font-size: 2rem; font-weight: 800; color: var(--text); margin-bottom: 2.5rem; position: relative; }
.section-title::after { content: ''; display: block; width: 40px; height: 4px; background: var(--primary); border-radius: 4px; margin-top: 0.5rem; }
.card-custom {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 2rem 1.8rem;
  height: 100%;
  transition: all 0.3s;
  box-shadow: var(--shadow-sm);
}
.card-custom:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.card-custom i { font-size: 2rem; color: var(--primary); margin-bottom: 1rem; }
.card-custom h4 { font-weight: 700; font-size: 1.2rem; margin-bottom: 0.8rem; }
.card-custom p { color: var(--text-light); font-size: 0.9rem; margin-bottom: 0; }

/* 对比表格 */
.compare-section { padding: 4rem 0; }
.table-wrap {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  border: 1px solid var(--border);
}
.table-custom { margin: 0; }
.table-custom thead th {
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  padding: 1.2rem 1.5rem;
  font-size: 1rem;
  border: none;
  text-align: center;
}
.table-custom thead th:first-child { text-align: left; }
.table-custom tbody td {
  padding: 1.2rem 1.5rem;
  vertical-align: middle;
  border-bottom: 1px solid var(--border);
  text-align: center;
  font-size: 0.95rem;
}
.table-custom tbody td:first-child { font-weight: 600; text-align: left; color: var(--text); }
.table-custom tbody tr:last-child td { border-bottom: none; }
.table-custom tbody tr:hover { background: #f8fafc; }
.mono { font-family: 'SFMono-Regular', Consolas, 'Courier New', monospace; font-size: 0.9rem; color: var(--primary); font-weight: 600; }
.check-icon { color: var(--primary); }
.cross-icon { color: #cbd5e1; }

/* 长文介绍 */
.longtext-section { padding: 4rem 0; }
.number-list { counter-reset: step; }
.number-list li {
  list-style: none;
  padding: 1.2rem 1.5rem 1.2rem 4rem;
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-bottom: 1rem;
  position: relative;
  transition: all 0.2s;
}
.number-list li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
  width: 2.2rem;
  height: 2.2rem;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}
.number-list li:hover { border-color: var(--primary); }
.number-list h5 { font-weight: 700; font-size: 1.05rem; margin-bottom: 0.3rem; }
.number-list p { color: var(--text-light); font-size: 0.9rem; margin: 0; }

/* FAQ */
.faq-section { padding: 4rem 0; }
.accordion-custom .accordion-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius) !important;
  margin-bottom: 1rem;
  overflow: hidden;
}
.accordion-custom .accordion-button {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  padding: 1.2rem 1.5rem;
  background: #fff;
  box-shadow: none;
}
.accordion-custom .accordion-button:not(.collapsed) { color: var(--primary); background: #f8fafc; }
.accordion-custom .accordion-button:focus { box-shadow: none; border-color: transparent; }
.accordion-custom .accordion-body { padding: 1rem 1.5rem 1.5rem; color: var(--text-light); font-size: 0.95rem; border-top: 1px solid var(--border); }

/* CTA */
.cta-section { padding: 5rem 0; background: var(--primary); position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; inset: 0; background-image: radial-gradient(rgba(255,255,255,0.1) 1px, transparent 1px); background-size: 20px 20px; }
.cta-section h2 { color: #fff; font-weight: 900; font-size: 2.5rem; position: relative; z-index: 1; }
.cta-section p { color: rgba(255,255,255,0.85); position: relative; z-index: 1; }
.cta-section .btn-light-custom { background: #fff; color: var(--primary); font-weight: 700; padding: 1rem 3rem; border-radius: var(--radius); border: none; transition: all 0.2s; position: relative; z-index: 1; }
.cta-section .btn-light-custom:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.2); }

/* 友情链接 */
.friend-links {
  padding: 3rem 0;
  background: #fff;
  border-top: 1px solid var(--border);
}
.friend-links h6 { font-weight: 700; color: var(--text); margin-bottom: 1rem; font-size: 0.95rem; text-transform: uppercase; letter-spacing: 1px; }
.friend-links a { color: var(--text-light); font-size: 0.9rem; margin-right: 1.5rem; transition: color 0.2s; }
.friend-links a:hover { color: var(--primary); }

/* 页脚 */
.footer {
  background: #1e293b;
  color: #94a3b8;
  padding: 3rem 0 2rem;
}
.footer .footer-brand { color: #fff; font-size: 1.5rem; font-weight: 900; display: flex; align-items: center; gap: 0.5rem; margin-bottom: 1rem; }
.footer .footer-brand i { color: #94a3b8; }
.footer p { font-size: 0.9rem; }
.footer .footer-links a { color: #94a3b8; margin-right: 1.5rem; font-size: 0.9rem; }
.footer .footer-links a:hover { color: #fff; }
.footer .copyright { border-top: 1px solid rgba(148, 163, 184, 0.2); padding-top: 1.5rem; margin-top: 2rem; font-size: 0.85rem; }

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

/* 图片 hover 效果 (通用) */
.hover-img-wrap { overflow: hidden; border-radius: var(--radius); position: relative; }
.hover-img-wrap img { transition: transform 0.5s ease; display: block; width: 100%; }
.hover-img-wrap:hover img { transform: scale(1.05); }
.hover-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(30, 41, 59, 0.7), transparent 60%); opacity: 0; transition: opacity 0.3s; display: flex; align-items: flex-end; padding: 1.5rem; }
.hover-overlay p { color: #fff; font-weight: 600; margin: 0; }
.hover-img-wrap:hover .hover-overlay { opacity: 1; }

/* 工具 */
.text-primary-c { color: var(--primary) !important; }
.bg-light-c { background: var(--bg) !important; }
.py-6 { padding-top: 4.5rem; padding-bottom: 4.5rem; }

@media (max-width: 768px) {
  .hero-section { padding: 3.5rem 0 2.5rem; }
  .section-title { font-size: 1.6rem; }
  .table-custom { font-size: 0.85rem; }
  .table-custom thead th, .table-custom tbody td { padding: 0.8rem; }
  .footer-links a { display: inline-block; margin-bottom: 0.5rem; }
}

/* --- 子页面追加 --- */
/* 关于页专属样式（少量补充，不覆盖站点全局） */
    .about-hero {
      background: linear-gradient(135deg, var(--bg) 0%, #e2e8f0 100%);
      border-bottom: 1px solid var(--border);
    }
.about-section {
      padding: 70px 0;
    }
.about-card {
      background: #fff;
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
      padding: 32px;
      border: 1px solid var(--border);
      transition: transform .2s ease, box-shadow .2s ease;
    }
.about-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
.about-card h3 {
      font-weight: 700;
      font-size: 1.35rem;
      color: var(--text);
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
.about-card h3 i {
      color: var(--primary);
    }
.about-card p {
      color: var(--text-light);
      line-height: 1.8;
      font-size: .95rem;
      margin-bottom: 0;
    }
.timeline {
      position: relative;
      padding-left: 28px;
      border-left: 2px solid var(--border);
      margin-left: 8px;
    }
.timeline-item {
      position: relative;
      margin-bottom: 28px;
    }
.timeline-item::before {
      content: '';
      position: absolute;
      left: -35px;
      top: 4px;
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background: var(--primary);
      border: 2px solid #fff;
      box-shadow: 0 0 0 2px var(--primary);
    }
.timeline-year {
      font-weight: 800;
      color: var(--primary);
      font-size: 1rem;
      display: block;
      margin-bottom: 4px;
    }
.timeline-text {
      color: var(--text-light);
      font-size: .92rem;
      line-height: 1.7;
    }
.value-item {
      background: var(--bg);
      border-radius: var(--radius);
      padding: 24px;
      height: 100%;
      border: 1px solid var(--border);
      transition: background .2s ease;
    }
.value-item:hover {
      background: #e8edf3;
    }
.value-item i {
      font-size: 1.8rem;
      color: var(--primary);
      margin-bottom: 14px;
    }
.value-item h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 8px;
    }
.value-item p {
      font-size: .9rem;
      color: var(--text-light);
      line-height: 1.6;
      margin-bottom: 0;
    }
.stats-badge {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 20px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }
.stats-number {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
    }
.stats-label {
      font-size: .85rem;
      color: var(--text-light);
      margin-top: 4px;
    }
.about-banner {
      background: var(--primary);
      border-radius: var(--radius);
      padding: 40px 36px;
      color: #fff;
      margin-top: 50px;
    }
.about-banner h3 {
      font-weight: 800;
      font-size: 1.5rem;
      margin-bottom: 12px;
      color: #fff;
    }
.about-banner p {
      opacity: .9;
      font-size: 1rem;
      line-height: 1.7;
      margin-bottom: 0;
    }
.about-section { padding: 40px 0; }
.about-card { padding: 24px; }
.about-banner { padding: 30px 24px; }

/* --- 子页面追加 --- */
/* 本页专属少量样式 */
    .disclaimer-hero { background: linear-gradient(135deg, rgba(100,116,139,0.08) 0%, rgba(148,163,184,0.12) 100%); }
.disclaimer-section { padding: 60px 0; }
.disclaimer-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; margin-bottom: 24px; box-shadow: var(--shadow-sm); }
.disclaimer-card h2 { color: var(--text); font-weight: 700; font-size: 1.4rem; margin-bottom: 16px; }
.disclaimer-card h2 i { color: var(--primary); margin-right: 10px; }
.disclaimer-card p, .disclaimer-card li { color: var(--text-light); line-height: 1.8; font-size: 0.95rem; }
.disclaimer-card ul { padding-left: 20px; }
.disclaimer-card li { margin-bottom: 8px; }
.highlight-box { background: rgba(100,116,139,0.06); border-left: 4px solid var(--primary); padding: 16px 20px; border-radius: 0 var(--radius) var(--radius) 0; margin: 16px 0; }
.last-updated { color: var(--text-light); font-size: 0.85rem; margin-top: 20px; text-align: right; }
.disclaimer-card { padding: 24px; }
.disclaimer-section { padding: 40px 0; }

/* --- 子页面追加 --- */
/* 本页专属补充样式 */
    .privacy-hero {
      background: linear-gradient(135deg, var(--bg) 0%, #e2e8f0 100%);
      padding: 4rem 0 3rem;
      border-bottom: 1px solid var(--border);
    }
.privacy-hero h1 {
      font-weight: 800;
      color: var(--text);
      font-size: 2.2rem;
      margin-bottom: 0.8rem;
    }
.privacy-hero p {
      color: var(--text-light);
      font-size: 1.05rem;
      max-width: 720px;
      line-height: 1.7;
    }
.privacy-section {
      padding: 2.5rem 0;
      border-bottom: 1px solid var(--border);
    }
.privacy-section:last-of-type {
      border-bottom: none;
    }
.privacy-section h2 {
      font-size: 1.4rem;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 1rem;
      position: relative;
      padding-left: 1rem;
      border-left: 4px solid var(--primary);
    }
.privacy-section h3 {
      font-size: 1.1rem;
      font-weight: 600;
      color: var(--text);
      margin: 1.5rem 0 0.6rem;
    }
.privacy-section p {
      color: var(--text);
      line-height: 1.75;
      margin-bottom: 0.8rem;
      font-size: 0.95rem;
    }
.privacy-section ul {
      padding-left: 1.5rem;
      margin-bottom: 1rem;
    }
.privacy-section ul li {
      color: var(--text);
      line-height: 1.7;
      font-size: 0.95rem;
      margin-bottom: 0.3rem;
    }
.privacy-section .highlight-box {
      background: rgba(100, 116, 139, 0.08);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 1.2rem 1.5rem;
      margin: 1.2rem 0;
      font-size: 0.92rem;
      color: var(--text);
    }
.privacy-section .highlight-box strong {
      color: var(--primary);
    }
.update-date {
      display: inline-block;
      background: var(--primary);
      color: #fff;
      padding: 0.2rem 1rem;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
      margin-bottom: 1rem;
    }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.table { color:#1e293b !important; border-color:rgba(0,0,0,.12) !important; --bs-table-bg:transparent !important; --bs-table-color:#1e293b !important; }
.accordion-header { background:transparent !important; }