:root {
  --primary: #22d3ee;
  --accent: #fb923c;
  --bg: #0f172a;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --border-color: rgba(148, 163, 184, 0.15);
  --card-bg: rgba(30, 41, 59, 0.6);
  --radius: 8px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}

/* 噪点纹理 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.03;
  z-index: 9999;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* 滚动进度条 */
.progress-bar-top {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  z-index: 10000;
  transition: width 0.1s ease;
  border-radius: 0 3px 3px 0;
}

/* 导航 */
.navbar {
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 0.75rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar-brand {
  font-weight: 900;
  font-size: 1.5rem;
  color: var(--primary) !important;
  letter-spacing: -0.02em;
}

.navbar-brand i {
  color: var(--accent);
  margin-right: 6px;
}

.nav-link {
  color: var(--text) !important;
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.5rem 1rem !important;
  transition: color 0.2s;
}

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

.navbar-toggler {
  border-color: var(--border-color);
}

.navbar-toggler:focus {
  box-shadow: 0 0 0 2px rgba(34, 211, 238, 0.3);
}

/* Hero 区域 */
.hero-section {
  position: relative;
  padding: 6rem 0 5rem;
  background: radial-gradient(ellipse at 20% 50%, rgba(34, 211, 238, 0.12) 0%, transparent 50%),
              radial-gradient(ellipse at 80% 20%, rgba(251, 146, 60, 0.1) 0%, transparent 50%);
  min-height: 75vh;
  display: flex;
  align-items: center;
}

.hero-stats {
  display: flex;
  gap: 3rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.stat-item {
  text-align: left;
}

.stat-number {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-weight: 800;
  font-size: 3rem;
  line-height: 1.1;
  color: var(--primary);
  letter-spacing: -0.03em;
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  margin-top: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  color: var(--text-muted);
  font-size: 1.15rem;
  max-width: 540px;
  margin-bottom: 2.5rem;
}

.hero-cta .btn {
  padding: 0.85rem 2.25rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.25s ease;
}

.btn-primary-custom {
  background: var(--primary);
  color: var(--bg) !important;
  border: none;
  box-shadow: 0 4px 20px rgba(34, 211, 238, 0.3);
}

.btn-primary-custom:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(34, 211, 238, 0.4);
}

.btn-outline-custom {
  border: 1.5px solid var(--border-color);
  color: var(--text) !important;
  background: transparent;
}

.btn-outline-custom:hover {
  border-color: var(--accent);
  color: var(--accent) !important;
}

/* 特色卡片 */
.features-section {
  padding: 5rem 0;
  border-top: 1px solid var(--border-color);
}

.section-label {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.section-desc {
  color: var(--text-muted);
  max-width: 600px;
  margin-bottom: 3rem;
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 2rem;
  height: 100%;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

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

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 1.5rem;
  border: 1.5px solid var(--primary);
  color: var(--primary);
  background: rgba(34, 211, 238, 0.08);
}

.feature-card:nth-child(2) .feature-icon {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(251, 146, 60, 0.08);
}

.feature-card:nth-child(3) .feature-icon {
  border-color: #a78bfa;
  color: #a78bfa;
  background: rgba(167, 139, 250, 0.08);
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* 长文介绍 - 手风琴 */
.about-section {
  padding: 5rem 0;
  background: rgba(30, 41, 59, 0.3);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.accordion-custom {
  max-width: 800px;
}

.accordion-item {
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius) !important;
  margin-bottom: 1rem;
  overflow: hidden;
}

.accordion-button {
  background: transparent;
  color: var(--text);
  font-weight: 600;
  padding: 1.25rem 1.5rem;
  font-size: 1.05rem;
}

.accordion-button:not(.collapsed) {
  background: rgba(34, 211, 238, 0.05);
  color: var(--primary);
  box-shadow: none;
}

.accordion-button:focus {
  box-shadow: none;
  border-color: var(--primary);
}

.accordion-button::after {
  filter: invert(0.8);
}

.accordion-body {
  padding: 1.25rem 1.5rem 1.5rem;
  color: var(--text-muted);
  line-height: 1.8;
}

/* FAQ */
.faq-section {
  padding: 5rem 0;
}

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.75rem;
  margin-bottom: 1.25rem;
  transition: border-color 0.2s;
}

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

.faq-item h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.faq-item h3 i {
  color: var(--accent);
  font-size: 0.9rem;
}

.faq-item p {
  color: var(--text-muted);
  margin-bottom: 0;
  padding-left: 2rem;
}

/* CTA */
.cta-section {
  padding: 5rem 0 6rem;
  border-top: 1px solid var(--border-color);
}

.cta-box {
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.1) 0%, rgba(251, 146, 60, 0.1) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 4rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.cta-box h2 {
  font-size: 2.5rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.cta-box p {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 500px;
  margin: 0 auto 2rem;
}

/* 友情链接 */
.friend-links {
  padding: 3rem 0;
  border-top: 1px solid var(--border-color);
  background: rgba(15, 23, 42, 0.6);
}

.friend-links h5 {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1.25rem;
}

/* 页脚 */
.footer {
  padding: 3rem 0 2rem;
  border-top: 1px solid var(--border-color);
  background: var(--bg);
}

.footer-brand {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--primary);
}

.footer-brand i {
  color: var(--accent);
  margin-right: 8px;
}

.footer-text {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 0.75rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  margin-right: 1.5rem;
  transition: color 0.2s;
}

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

.footer-bottom {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* 响应式 */
@media (max-width: 768px) {
  .hero-section {
    padding: 4rem 0 3rem;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-stats {
    gap: 1.5rem;
  }
  
  .stat-number {
    font-size: 2.25rem;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .cta-box h2 {
    font-size: 1.75rem;
  }
  
  .navbar-collapse {
    background: rgba(15, 23, 42, 0.98);
    padding: 1rem;
    border-radius: var(--radius);
    margin-top: 0.5rem;
    border: 1px solid var(--border-color);
  }
}

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

.fade-in-up {
  animation: fadeInUp 0.8s ease forwards;
  opacity: 0;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }

/* 海报 hover 效果 */
.poster-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
}

.poster-card img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  transition: transform 0.4s ease;
}

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

.poster-card .play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  background: rgba(34, 211, 238, 0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.poster-card:hover .play-btn {
  opacity: 1;
}

.poster-card .play-btn i {
  color: var(--bg);
  font-size: 1.5rem;
  margin-left: 4px;
}

/* --- 子页面追加 --- */
/* 本页专属样式 - 关于页面的时间线、价值观卡片等 */
    .timeline-wrap { position: relative; padding: 2rem 0; }
.timeline-wrap::before { content: ''; position: absolute; left: 18px; top: 0; bottom: 0; width: 2px; background: linear-gradient(to bottom, transparent, var(--primary), var(--accent), transparent); }
.timeline-item { position: relative; padding-left: 50px; margin-bottom: 2rem; }
.timeline-item::before { content: ''; position: absolute; left: 10px; top: 8px; width: 18px; height: 18px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 12px rgba(34, 211, 238, 0.6); border: 3px solid var(--bg); }
.timeline-item:nth-child(even)::before { background: var(--accent); box-shadow: 0 0 12px rgba(251, 146, 60, 0.6); }
.value-card { background: var(--card-bg); border: 1px solid var(--border-color); border-radius: var(--radius); padding: 1.5rem; height: 100%; transition: transform .3s ease, box-shadow .3s ease; }
.value-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: rgba(34, 211, 238, 0.4); }
.value-icon { font-size: 2rem; color: var(--primary); margin-bottom: 1rem; display: inline-block; }
.stat-inline { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.stat-inline .stat-chip { background: rgba(34, 211, 238, 0.1); border: 1px solid rgba(34, 211, 238, 0.3); border-radius: 50px; padding: .4rem 1.2rem; font-size: .9rem; color: var(--primary); font-weight: 600; }
.about-hero { padding: 5rem 0 3rem; }
.about-hero .badge-soft { display: inline-block; background: rgba(34, 211, 238, 0.12); color: var(--primary); border: 1px solid rgba(34, 211, 238, 0.3); padding: .3rem 1rem; border-radius: 50px; font-size: .85rem; font-weight: 600; margin-bottom: 1rem; }
.about-hero h1 { font-size: 2.8rem; font-weight: 800; line-height: 1.2; margin-bottom: 1rem; }
.about-hero p { color: var(--text-muted); font-size: 1.1rem; max-width: 700px; margin: 0 auto; }
.divider-glow { width: 60px; height: 3px; background: linear-gradient(90deg, var(--primary), var(--accent)); border-radius: 3px; margin: 1.5rem auto; }
.quote-block { background: rgba(251, 146, 60, 0.08); border-left: 3px solid var(--accent); padding: 1.2rem 1.5rem; border-radius: 0 var(--radius) var(--radius) 0; margin: 2rem 0; font-style: italic; color: var(--text); }

/* --- 子页面追加 --- */
/* 本页专属微调 —— 确保与站点深色风格完全统一 */
        .disclaimer-hero {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 3rem 2rem;
            margin-bottom: 2.5rem;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow);
        }
.disclaimer-section {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 2rem;
            margin-bottom: 2rem;
            border: 1px solid var(--border-color);
            transition: transform 0.2s ease;
        }
.disclaimer-section:hover {
            transform: translateY(-2px);
        }
.disclaimer-section h2 {
            color: var(--primary);
            font-weight: 700;
            font-size: 1.5rem;
            margin-bottom: 1.2rem;
            border-left: 4px solid var(--accent);
            padding-left: 1rem;
        }
.disclaimer-section p, .disclaimer-section li {
            color: var(--text);
            line-height: 1.7;
        }
.disclaimer-section ul, .disclaimer-section ol {
            padding-left: 1.5rem;
            margin: 1rem 0;
        }
.disclaimer-section a {
            color: var(--accent);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
.disclaimer-section a:hover {
            color: var(--primary);
        }
.muted-text {
            color: var(--text-muted);
            font-size: 0.95rem;
        }
.badge-custom {
            background: rgba(34, 211, 238, 0.15);
            color: var(--primary);
            padding: 0.3rem 0.8rem;
            border-radius: 30px;
            font-weight: 500;
            font-size: 0.8rem;
            border: 1px solid rgba(34, 211, 238, 0.3);
        }
/* 覆盖 bootstrap 组件默认白底 */
        .navbar, .navbar-collapse, .navbar-toggler {
            background-color: transparent !important;
        }
.navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28226, 232, 240, 0.8%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

/* --- 子页面追加 --- */
/* 页面级微调 —— 沿用首页变量，仅补充本页特有布局 */
        .privacy-hero {
            padding: 5rem 0 2.5rem;
        }
.privacy-title {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            background: linear-gradient(120deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 0.5rem;
        }
.privacy-sub {
            color: var(--text-muted);
            font-size: 1.1rem;
            border-left: 4px solid var(--primary);
            padding-left: 1.25rem;
            margin-top: 1rem;
        }
.privacy-section {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 1.8rem 1.8rem 1.5rem;
            margin-bottom: 1.8rem;
            backdrop-filter: blur(4px);
            box-shadow: var(--shadow);
        }
.privacy-section h2 {
            color: var(--primary);
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            border-bottom: 1px dashed var(--border-color);
            padding-bottom: 0.7rem;
        }
.privacy-section h2 i {
            color: var(--accent);
            font-size: 1.2rem;
        }
.privacy-section p, .privacy-section li {
            color: var(--text);
            font-size: 0.98rem;
            line-height: 1.75;
        }
.privacy-section ul, .privacy-section ol {
            padding-left: 1.2rem;
            margin: 0.8rem 0;
        }
.privacy-section li {
            margin-bottom: 0.4rem;
        }
.privacy-section a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            transition: color 0.2s;
        }
.privacy-section a:hover {
            color: var(--accent);
        }
.last-updated {
            font-size: 0.85rem;
            color: var(--text-muted);
            letter-spacing: 0.3px;
            margin-top: 0.8rem;
        }
.contact-block {
            background: rgba(0, 0, 0, 0.2);
            border-radius: var(--radius);
            padding: 1rem 1.2rem;
            margin-top: 1.2rem;
            border-left: 3px solid var(--accent);
        }
.contact-block p {
            margin-bottom: 0.3rem;
        }
/* 导航高亮当前页 */
        .navbar .nav-link.active-privacy {
            color: var(--accent) !important;
            font-weight: 600;
        }
.privacy-title { font-size: 2rem; }
.privacy-section { padding: 1.2rem; }

/* --- 子页面追加 --- */
/* 覆盖 Bootstrap 组件配色,确保与深色主题一致 */
    .card, .card-body, .card-header, .card-footer {
      background: var(--card-bg);
      color: var(--text);
      border: 1px solid var(--border-color);
    }
.list-group-item {
      background: var(--card-bg);
      color: var(--text);
      border-color: var(--border-color);
    }
.form-control, .form-select {
      background: rgba(0, 0, 0, 0.35);
      color: var(--text);
      border-color: var(--border-color);
    }
.form-control::placeholder {
      color: rgba(255, 255, 255, 0.45);
    }
/* 小卡片阴影 */
    .guide-card {
      background: var(--card-bg);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      padding: 1.5rem;
      height: 100%;
      border: 1px solid var(--border-color);
      transition: transform 0.2s;
    }
.guide-card:hover {
      transform: translateY(-4px);
    }
.step-number {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 32px;
      height: 32px;
      background: var(--primary);
      color: #0b1120;
      border-radius: 50%;
      font-weight: 700;
      margin-right: 8px;
    }
.tip-block {
      background: rgba(251, 146, 60, 0.08);
      border-left: 4px solid var(--accent);
      padding: 1rem 1.2rem;
      border-radius: 0 var(--radius) var(--radius) 0;
      margin: 1.5rem 0;
    }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.table { color:#e2e8f0 !important; border-color:rgba(255,255,255,.12) !important; --bs-table-bg:transparent !important; --bs-table-color:#e2e8f0 !important; }
.accordion-header { background:transparent !important; }