:root {
  --primary: #059669;
  --accent: #14b8a6;
  --bg: #f0fdfa;
  --text: #134e4a;
  --text-light: #4d7c76;
  --text-dark: #0b3d39;
  --white: #ffffff;
  --shadow-sm: 0 2px 8px rgba(5,150,105,0.08);
  --shadow-md: 0 6px 24px rgba(5,150,105,0.12);
  --shadow-lg: 0 12px 40px rgba(5,150,105,0.18);
  --gradient-primary: linear-gradient(135deg, #059669 0%, #14b8a6 100%);
  --gradient-light: linear-gradient(145deg, #ffffff 0%, #e6fffa 100%);
  --font-head: 'Inter', -apple-system, 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', -apple-system, 'Microsoft YaHei', 'PingFang SC', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 15px;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 800;
  color: var(--text-dark);
  letter-spacing: -0.02em;
}

/* 顶部阅读进度条 */
.progress-bar-top {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 4px;
  background: var(--gradient-primary);
  z-index: 9999;
  border-radius: 0 4px 4px 0;
  transition: width 0.15s ease-out;
  box-shadow: 0 0 12px rgba(20,184,166,0.5);
}

/* 导航栏 */
.navbar-main {
  background: rgba(240,253,250,0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(5,150,105,0.15);
  padding: 14px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 20px rgba(5,150,105,0.06);
}

.navbar-brand {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.6rem;
  color: var(--text-dark) !important;
  letter-spacing: -0.03em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.navbar-brand i {
  color: var(--primary);
  font-size: 1.5rem;
}

.nav-link {
  font-weight: 600;
  color: var(--text) !important;
  margin: 0 12px;
  font-size: 0.95rem;
  transition: color 0.2s;
  position: relative;
}

.nav-link:hover {
  color: var(--primary) !important;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width 0.3s;
}

.nav-link:hover::after {
  width: 100%;
}

.navbar-toggler {
  border: none;
  font-size: 1.4rem;
  color: var(--text-dark);
}

.navbar-toggler:focus {
  box-shadow: none;
}

/* Hero 区块 */
.hero-section {
  padding: 100px 0 60px;
  position: relative;
  text-align: center;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.hero-stat-item {
  text-align: center;
}

.hero-stat-number {
  font-family: var(--font-mono);
  font-size: 3.2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  display: block;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat-label {
  font-size: 0.9rem;
  color: var(--text-light);
  font-weight: 500;
  letter-spacing: 0.05em;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  margin-bottom: 24px;
  color: var(--text-dark);
  line-height: 1.15;
}

.hero-title span {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-light);
  max-width: 700px;
  margin: 0 auto 40px;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-hero {
  padding: 14px 36px;
  font-weight: 700;
  font-size: 1rem;
  border-radius: 12px;
  border: none;
  transition: all 0.3s;
  font-family: var(--font-head);
}

.btn-hero-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 6px 20px rgba(5,150,105,0.3);
}

.btn-hero-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(5,150,105,0.4);
  color: white;
}

.btn-hero-outline {
  background: white;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-hero-outline:hover {
  background: var(--primary);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(5,150,105,0.2);
}

/* 通用区块 */
.section-padding {
  padding: 80px 0;
}

.section-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 12px;
  background: rgba(5,150,105,0.1);
  padding: 4px 12px;
  border-radius: 20px;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 900;
  margin-bottom: 16px;
  color: var(--text-dark);
}

.section-desc {
  font-size: 1rem;
  color: var(--text-light);
  max-width: 720px;
  margin-bottom: 40px;
}

/* 长文介绍区块 - 时间线 */
.about-section {
  background: var(--white);
  border-radius: 24px;
  padding: 60px;
  box-shadow: var(--shadow-md);
  margin: 20px 0;
}

.timeline-wrap {
  position: relative;
  padding-left: 40px;
  margin-top: 40px;
}

.timeline-wrap::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--primary), var(--accent), transparent);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
  padding-left: 30px;
  animation: fadeInLeft 0.6s ease-out;
  animation-fill-mode: both;
}

.timeline-item:nth-child(1) { animation-delay: 0.1s; }
.timeline-item:nth-child(2) { animation-delay: 0.25s; }
.timeline-item:nth-child(3) { animation-delay: 0.4s; }
.timeline-item:nth-child(4) { animation-delay: 0.55s; }

.timeline-item::before {
  content: '';
  position: absolute;
  left: -37px;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--gradient-primary);
  border: 3px solid white;
  box-shadow: 0 0 0 3px rgba(5,150,105,0.2);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.timeline-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 6px 0 8px;
  color: var(--text-dark);
}

.timeline-text {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* 对比表格 */
.compare-section {
  padding: 40px 0;
}

.compare-table-wrap {
  background: white;
  border-radius: 20px;
  padding: 40px;
  box-shadow: var(--shadow-md);
  overflow-x: auto;
}

.compare-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
}

.compare-table th {
  background: var(--gradient-primary);
  color: white;
  padding: 16px 20px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1rem;
  text-align: center;
}

.compare-table th:first-child {
  border-radius: 12px 0 0 0;
  text-align: left;
}

.compare-table th:last-child {
  border-radius: 0 12px 0 0;
}

.compare-table td {
  padding: 16px 20px;
  border-bottom: 1px solid rgba(5,150,105,0.1);
  text-align: center;
  font-size: 0.95rem;
  color: var(--text);
}

.compare-table td:first-child {
  text-align: left;
  font-weight: 600;
  color: var(--text-dark);
}

.compare-table tr:last-child td {
  border-bottom: none;
}

.compare-table tr:hover td {
  background: rgba(5,150,105,0.04);
}

.compare-check {
  color: var(--primary);
  font-size: 1.2rem;
}

.compare-cross {
  color: #e11d48;
  font-size: 1.2rem;
}

/* FAQ 区块 */
.faq-section {
  background: white;
  border-radius: 24px;
  padding: 50px;
  box-shadow: var(--shadow-md);
  margin: 20px 0;
}

.faq-item {
  background: var(--bg);
  border-radius: 16px;
  padding: 24px 28px;
  margin-bottom: 16px;
  border-left: 4px solid var(--primary);
  transition: all 0.3s;
}

.faq-item:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 12px;
}

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

.faq-answer {
  font-size: 0.95rem;
  color: var(--text-light);
  padding-left: 32px;
  line-height: 1.8;
}

/* 特色区块 - 标签页 */
.features-section {
  background: white;
  border-radius: 24px;
  padding: 50px;
  box-shadow: var(--shadow-md);
  margin: 20px 0;
}

.nav-tabs-feature {
  border: none;
  gap: 8px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.nav-tabs-feature .nav-link {
  border: 2px solid rgba(5,150,105,0.2);
  border-radius: 30px;
  color: var(--text);
  font-weight: 600;
  padding: 10px 24px;
  transition: all 0.3s;
  font-size: 0.9rem;
}

.nav-tabs-feature .nav-link.active {
  background: var(--gradient-primary);
  border-color: transparent;
  color: white;
  box-shadow: 0 4px 16px rgba(5,150,105,0.25);
}

.nav-tabs-feature .nav-link:hover:not(.active) {
  border-color: var(--primary);
  color: var(--primary);
}

.feature-panel {
  display: none;
  animation: fadeInUp 0.4s ease-out;
}

.feature-panel.active {
  display: block;
}

.feature-list {
  list-style: none;
  padding: 0;
}

.feature-list li {
  padding: 14px 0;
  border-bottom: 1px solid rgba(5,150,105,0.1);
  display: flex;
  align-items: flex-start;
  gap: 14px;
  font-size: 0.98rem;
  color: var(--text);
  line-height: 1.7;
}

.feature-list li:last-child {
  border-bottom: none;
}

.feature-list li i {
  color: var(--primary);
  font-size: 1.1rem;
  margin-top: 3px;
  flex-shrink: 0;
}

/* CTA 区块 */
.cta-section {
  background: var(--gradient-primary);
  border-radius: 24px;
  padding: 60px;
  text-align: center;
  color: white;
  margin: 40px 0;
  box-shadow: 0 12px 40px rgba(5,150,105,0.35);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
}

.cta-title {
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 16px;
  color: white;
}

.cta-desc {
  font-size: 1.05rem;
  opacity: 0.95;
  max-width: 600px;
  margin: 0 auto 32px;
  line-height: 1.8;
}

.btn-cta {
  background: white;
  color: var(--primary);
  padding: 14px 44px;
  font-weight: 700;
  font-size: 1rem;
  border-radius: 50px;
  border: none;
  transition: all 0.3s;
  display: inline-block;
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.btn-cta:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 8px 30px rgba(0,0,0,0.2);
  color: var(--text-dark);
}

/* 友情链接 */
.friend-links {
  background: white;
  border-radius: 16px;
  padding: 30px;
  margin-top: 60px;
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.friend-links h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 16px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.friend-links h4 i {
  color: var(--primary);
}

.friend-links .link-list {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* 页脚 */
.footer-main {
  background: var(--text-dark);
  color: rgba(255,255,255,0.85);
  padding: 60px 0 30px;
  margin-top: 60px;
}

.footer-brand {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.5rem;
  color: white;
  margin-bottom: 16px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.footer-brand i {
  color: var(--accent);
}

.footer-text {
  font-size: 0.9rem;
  opacity: 0.8;
  line-height: 1.8;
  margin-bottom: 20px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.footer-links a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.2s;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding-top: 24px;
  margin-top: 24px;
  font-size: 0.8rem;
  opacity: 0.6;
  text-align: center;
}

/* 滚动动效 */
.scroll-fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.scroll-fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* 卡片错落滚动 */
.stagger-card {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.stagger-card.visible {
  opacity: 1;
  transform: translateY(0);
}

/* hover 图片效果 */
.hover-zoom {
  overflow: hidden;
  border-radius: 12px;
  position: relative;
}

.hover-zoom img {
  transition: transform 0.5s ease;
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.hover-zoom:hover img {
  transform: scale(1.08);
}

.hover-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px;
  background: linear-gradient(to top, rgba(5,150,105,0.95), transparent);
  color: white;
  font-weight: 600;
  font-size: 0.9rem;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.hover-zoom:hover .hover-overlay {
  opacity: 1;
}

/* 响应式 */
@media (max-width: 991px) {
  .navbar-collapse {
    background: var(--bg);
    padding: 20px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    margin-top: 10px;
    border: 1px solid rgba(5,150,105,0.1);
  }
  
  .nav-link {
    margin: 6px 0;
    padding: 8px 12px !important;
  }
  
  .hero-section {
    padding: 60px 0 40px;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-stats {
    gap: 30px;
  }
  
  .hero-stat-number {
    font-size: 2.4rem;
  }
  
  .about-section,
  .faq-section,
  .features-section {
    padding: 30px 20px;
  }
  
  .cta-section {
    padding: 40px 20px;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
}

@media (max-width: 575px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-stat-number {
    font-size: 2rem;
  }
  
  .hero-stats {
    gap: 20px;
  }
  
  .compare-table-wrap {
    padding: 20px;
  }
  
  .timeline-wrap {
    padding-left: 30px;
  }
}

/* --- 子页面追加 --- */
/* 页面专属微调，保持整体风格一致 */
    .page-hero {
      background: var(--gradient-light);
      border-bottom: 1px solid rgba(5, 150, 105, 0.15);
    }
.page-hero .hero-title {
      color: var(--text-dark);
      font-weight: 800;
      letter-spacing: -0.02em;
    }
.about-lead {
      color: var(--text-light);
      font-size: 1.1rem;
      line-height: 1.8;
    }
.section-card {
      background: var(--white);
      border-radius: 20px;
      box-shadow: var(--shadow-sm);
      padding: 2rem 1.8rem;
      transition: box-shadow .25s, transform .25s;
      height: 100%;
      border: 1px solid rgba(5, 150, 105, 0.08);
    }
.section-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
.icon-badge {
      width: 48px;
      height: 48px;
      background: var(--gradient-primary);
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 1.4rem;
      margin-bottom: 1rem;
    }

/* --- 子页面追加 --- */
/* 确保 bootstrap 无白底冲突——本页不使用 .card 等组件类，仅用栅格和自写组件 */
    .disclaimer-hero {
      background: var(--gradient-light);
      padding: 4rem 0 3rem;
      border-bottom: 1px solid rgba(5,150,105,0.1);
    }
.disclaimer-title {
      color: var(--text-dark);
      font-weight: 800;
      letter-spacing: -0.02em;
    }
.disclaimer-sub {
      color: var(--text-light);
      font-size: 1.1rem;
    }
.section-block {
      margin-top: 2.5rem;
    }
.block-heading {
      color: var(--primary);
      font-weight: 700;
      font-size: 1.4rem;
      margin-bottom: 1rem;
      display: flex;
      align-items: center;
      gap: 0.6rem;
    }
.block-heading i {
      font-size: 1.3rem;
      color: var(--accent);
    }
.block-text {
      color: var(--text);
      line-height: 1.8;
      background: rgba(255,255,255,0.5);
      padding: 1.2rem 1.5rem;
      border-radius: 18px;
      border-left: 4px solid var(--accent);
      box-shadow: var(--shadow-sm);
    }
.block-text p {
      margin-bottom: 0.8rem;
    }
.block-text ul {
      padding-left: 1.2rem;
      margin-bottom: 0.8rem;
    }
.block-text li {
      margin-bottom: 0.4rem;
    }
.important-note {
      background: #ecfdf5;
      border: 1px solid #a7f3d0;
      border-radius: 16px;
      padding: 1.5rem 1.8rem;
      margin-top: 2.5rem;
    }
.important-note h3 {
      color: var(--text-dark);
      font-weight: 700;
      font-size: 1.25rem;
      margin-bottom: 0.75rem;
    }
.footer-space {
      padding: 3rem 0;
    }
.footnote {
      font-size: 0.9rem;
      color: var(--text-light);
    }

/* --- 子页面追加 --- */
/* 隐私政策专用：确保Bootstrap组件配色与站点一致（若站点CSS未覆盖） */
        .privacy-card, .privacy-card .card-body {
            background: var(--gradient-light);
            color: var(--text);
            border: 1px solid rgba(5,150,105,0.15);
            border-radius: 20px;
            box-shadow: var(--shadow-sm);
        }
.privacy-card .card-title {
            color: var(--primary);
            font-weight: 700;
        }
.privacy-card .card-text {
            color: var(--text-light);
        }
.privacy-list-group .list-group-item {
            background: transparent;
            color: var(--text);
            border-color: rgba(5,150,105,0.1);
            padding-left: 1.5rem;
        }
.privacy-list-group .list-group-item i {
            color: var(--primary);
            margin-right: 0.75rem;
        }
.privacy-accordion .accordion-item {
            background: transparent;
            border: 1px solid rgba(5,150,105,0.15);
            border-radius: 16px !important;
            overflow: hidden;
            margin-bottom: 1rem;
        }
.privacy-accordion .accordion-button {
            background: var(--gradient-light);
            color: var(--text-dark);
            font-weight: 600;
            border: none;
            box-shadow: none;
            padding: 1rem 1.25rem;
            font-size: 1rem;
        }
.privacy-accordion .accordion-button:not(.collapsed) {
            background: var(--gradient-primary);
            color: #fff;
        }
.privacy-accordion .accordion-button:focus {
            box-shadow: none;
        }
.privacy-accordion .accordion-body {
            background: rgba(255,255,255,0.6);
            color: var(--text);
            border-top: 1px solid rgba(5,150,105,0.1);
            padding: 1.25rem;
        }
.privacy-table {
            --bs-table-bg: transparent;
            --bs-table-color: var(--text);
            border-color: rgba(5,150,105,0.1);
        }
.privacy-table th {
            color: var(--primary);
            font-weight: 600;
        }
.privacy-table td, .privacy-table th {
            padding: 0.75rem;
            border-bottom: 1px solid rgba(5,150,105,0.08);
        }
.privacy-muted {
            color: var(--text-light);
        }
.privacy-highlight {
            background: linear-gradient(145deg, #ffffff, #e6fffa);
            border-left: 4px solid var(--primary);
            padding: 1rem 1.25rem;
            border-radius: 0 16px 16px 0;
        }
.contact-email {
            color: var(--primary);
            font-weight: 600;
            text-decoration: none;
            border-bottom: 1px dashed var(--primary);
        }
.contact-email:hover {
            color: var(--accent);
            border-bottom-style: solid;
        }
/* 确保导航高亮当前页 */
        .navbar-nav .nav-link[href="/privacy.html"] {
            color: var(--primary) !important;
            font-weight: 700;
            position: relative;
        }
.navbar-nav .nav-link[href="/privacy.html"]::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0.5rem;
            right: 0.5rem;
            height: 2px;
            background: var(--gradient-primary);
            border-radius: 2px;
        }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.table { color:#134e4a !important; border-color:rgba(0,0,0,.12) !important; --bs-table-bg:transparent !important; --bs-table-color:#134e4a !important; }