:root {
  --primary: #22d3ee;
  --accent: #fb923c;
  --bg-dark: #0f172a;
  --text-light: #e2e8f0;
  --radius-sm: 8px;
  --shadow-subtle: 0 2px 12px rgba(0,0,0,0.25);
  --border-light: rgba(226,232,240,0.12);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-light);
  line-height: 1.75;
  font-weight: 400;
  letter-spacing: 0.01em;
  overflow-x: hidden;
}

h1,h2,h3,h4,h5,.display-font {
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.navbar-51 {
  background: rgba(15,23,42,0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-light);
  padding: 0.85rem 0;
  position: sticky;
  top: 0;
  z-index: 1080;
}

.navbar-51 .navbar-brand {
  font-weight: 900;
  font-size: 1.55rem;
  color: #fff !important;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.navbar-51 .navbar-brand i {
  color: var(--accent);
  font-size: 1.5rem;
}

.navbar-51 .nav-link {
  color: var(--text-light);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.5rem 1rem !important;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.navbar-51 .nav-link:hover {
  color: var(--primary);
  background: rgba(34,211,238,0.08);
}

.navbar-toggler {
  border: 1px solid var(--border-light);
  background: transparent;
  padding: 0.3rem 0.5rem;
}

.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3e%3cpath stroke='rgba(226,232,240,1)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e") !important;
}

.hero-section {
  position: relative;
  padding: 6rem 0 5rem;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -10%;
  left: -5%;
  width: 60%;
  height: 80%;
  background: radial-gradient(circle at 30% 50%, rgba(34,211,238,0.08), transparent 60%);
  pointer-events: none;
}

.hero-stats {
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

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

.stat-number {
  font-size: 3.8rem;
  font-weight: 900;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  color: var(--primary);
  line-height: 1;
  letter-spacing: -0.04em;
}

.stat-label {
  font-size: 0.95rem;
  color: var(--text-light);
  opacity: 0.7;
  margin-top: 0.3rem;
  font-weight: 500;
}

.hero-title {
  font-size: clamp(3rem, 6vw, 4.5rem);
  font-weight: 900;
  margin-bottom: 1.2rem;
  line-height: 1.1;
}

.hero-title .highlight {
  color: var(--accent);
  position: relative;
}

.hero-sub {
  font-size: 1.15rem;
  opacity: 0.85;
  max-width: 480px;
  margin-bottom: 2rem;
  font-weight: 400;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn-51-primary {
  background: var(--primary);
  color: #0f172a;
  border: none;
  padding: 0.8rem 2rem;
  font-weight: 800;
  font-size: 1rem;
  border-radius: var(--radius-sm);
  transition: all 0.25s ease;
}

.btn-51-primary:hover {
  background: #0ea5c4;
  color: #0f172a;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(34,211,238,0.25);
}

.btn-51-outline {
  background: transparent;
  color: var(--text-light);
  border: 1px solid var(--border-light);
  padding: 0.8rem 2rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all 0.25s ease;
}

.btn-51-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(251,146,60,0.05);
}

.hero-visual {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-subtle);
}

.hero-visual img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  display: block;
  background: linear-gradient(145deg, #1e293b, #334155);
}

.section-divider {
  position: relative;
  height: 90px;
  margin-top: -1px;
}

.section-divider svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  fill: var(--bg-dark);
}

.section-divider.flip svg {
  transform: scaleX(-1);
}

.features-section {
  background: #0b1222;
  padding: 4rem 0 5rem;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.section-label {
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 900;
  margin-bottom: 1rem;
}

.section-desc {
  opacity: 0.75;
  max-width: 520px;
  margin-bottom: 3rem;
}

.feature-card {
  background: rgba(34,211,238,0.03);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 1.8rem 1.5rem;
  height: 100%;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  border-color: var(--primary);
  background: rgba(34,211,238,0.06);
  transform: translateY(-4px);
}

.feature-icon {
  font-size: 2.2rem;
  color: var(--primary);
  margin-bottom: 1rem;
  display: block;
}

.feature-card:nth-child(2) .feature-icon,
.feature-card:nth-child(4) .feature-icon {
  color: var(--accent);
}

.feature-card h4 {
  font-weight: 800;
  font-size: 1.2rem;
  margin-bottom: 0.6rem;
}

.feature-card p {
  opacity: 0.8;
  font-size: 0.92rem;
  margin-bottom: 0;
}

.faq-section {
  padding: 5rem 0;
  background: var(--bg-dark);
}

.accordion-51 .accordion-item {
  background: transparent;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm) !important;
  margin-bottom: 1rem;
  overflow: hidden;
}

.accordion-51 .accordion-item:first-of-type,
.accordion-51 .accordion-item:last-of-type {
  border-radius: var(--radius-sm) !important;
}

.accordion-51 .accordion-button {
  background: transparent;
  color: var(--text-light);
  font-weight: 700;
  font-size: 1.02rem;
  padding: 1.2rem 1.5rem;
  box-shadow: none;
  border: none;
}

.accordion-51 .accordion-button:not(.collapsed) {
  background: rgba(34,211,238,0.06);
  color: var(--primary);
}

.accordion-51 .accordion-button::after {
  filter: invert(1) hue-rotate(200deg);
}

.accordion-51 .accordion-button:focus {
  box-shadow: none;
}

.accordion-51 .accordion-body {
  padding: 0 1.5rem 1.5rem;
  color: var(--text-light);
  opacity: 0.85;
}

.intro-section {
  padding: 5rem 0;
  background: #0b1222;
  border-top: 1px solid var(--border-light);
}

.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.intro-image {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-subtle);
}

.intro-image img {
  width: 100%;
  height: 340px;
  object-fit: cover;
  display: block;
  background: linear-gradient(145deg, #1e293b, #2d3b52);
}

.intro-text h2 {
  font-size: 2.2rem;
  margin-bottom: 1.2rem;
}

.intro-text p {
  opacity: 0.8;
  margin-bottom: 1.2rem;
}

.cta-section {
  padding: 5rem 0;
  background: linear-gradient(180deg, var(--bg-dark) 0%, #0b1222 100%);
  text-align: center;
  border-top: 1px solid var(--border-light);
}

.cta-box {
  background: rgba(34,211,238,0.05);
  border: 1px solid rgba(34,211,238,0.2);
  border-radius: 12px;
  padding: 3.5rem 2rem;
  max-width: 720px;
  margin: 0 auto;
}

.cta-box h2 {
  font-size: 2.2rem;
  margin-bottom: 1rem;
}

.cta-box p {
  opacity: 0.8;
  margin-bottom: 2rem;
}

.friends-section {
  padding: 3rem 0 2rem;
  background: var(--bg-dark);
  border-top: 1px solid var(--border-light);
}

.friends-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-light);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.friends-title i {
  color: var(--accent);
}

.friends-links {
  font-size: 0.92rem;
  opacity: 0.8;
}

.footer-51 {
  background: #0a0f1a;
  padding: 2.5rem 0 2rem;
  border-top: 1px solid var(--border-light);
  font-size: 0.9rem;
}

.footer-brand {
  font-weight: 900;
  font-size: 1.3rem;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

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

.footer-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.2rem;
}

.footer-links a {
  color: var(--text-light);
  opacity: 0.7;
  text-decoration: none;
  transition: opacity 0.2s;
}

.footer-links a:hover {
  opacity: 1;
  color: var(--primary);
}

.footer-copyright {
  opacity: 0.5;
  font-size: 0.82rem;
}

.scroll-fade {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.play-hover {
  position: relative;
}

.play-hover .play-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15,23,42,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.35s ease;
  border-radius: 12px;
  cursor: pointer;
}

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

.play-overlay i {
  font-size: 3rem;
  color: var(--primary);
  text-shadow: 0 4px 20px rgba(0,0,0,0.5);
  transition: transform 0.3s ease;
}

.play-hover:hover .play-overlay i {
  transform: scale(1.15);
}

.img-lazy {
  background: linear-gradient(145deg, #1e293b, #2d3b52);
  position: relative;
}

@media (max-width: 991px) {
  .hero-section { padding: 4rem 0; }
  .hero-title { font-size: 2.8rem; }
  .intro-grid { grid-template-columns: 1fr; }
  .stat-number { font-size: 2.8rem; }
}

@media (max-width: 768px) {
  .navbar-51 .navbar-nav { padding-top: 0.8rem; }
  .section-title { font-size: 2rem; }
}

/* --- 子页面追加 --- */
.ranking-section {
            padding: 80px 0;
            background: var(--bg-dark);
        }
.ranking-hero {
            background: linear-gradient(135deg, rgba(34,211,238,0.1) 0%, rgba(251,146,60,0.1) 100%);
            padding: 60px 0;
            border-bottom: 1px solid var(--border-light);
        }
.ranking-hero h1 {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 16px;
        }
.ranking-hero p {
            color: rgba(226,232,240,0.8);
            font-size: 1.1rem;
            max-width: 700px;
            margin: 0 auto;
        }
.ranking-tabs {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }
.ranking-tab {
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            background: rgba(226,232,240,0.08);
            color: var(--text-light);
            border: 1px solid var(--border-light);
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 0.95rem;
        }
.ranking-tab:hover, .ranking-tab.active {
            background: var(--primary);
            color: var(--bg-dark);
            border-color: var(--primary);
        }
.rank-card {
            background: rgba(226,232,240,0.04);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 20px;
            margin-bottom: 16px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
.rank-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-subtle);
        }
.rank-number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            margin-right: 20px;
            min-width: 50px;
            text-align: center;
        }
.rank-info {
            flex: 1;
        }
.rank-title {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-light);
            margin-bottom: 6px;
        }
.rank-meta {
            color: rgba(226,232,240,0.6);
            font-size: 0.9rem;
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
.rank-tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            background: rgba(34,211,238,0.15);
            color: var(--primary);
            border: 1px solid rgba(34,211,238,0.3);
            margin-right: 8px;
        }
.rank-hot {
            background: rgba(251,146,60,0.15);
            color: var(--accent);
            border-color: rgba(251,146,60,0.3);
        }
.rank-score {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--accent);
            min-width: 60px;
            text-align: right;
        }
.rank-desc {
            color: rgba(226,232,240,0.7);
            font-size: 0.95rem;
            margin-top: 10px;
            line-height: 1.6;
        }
.trending-section {
            padding: 80px 0;
            background: rgba(0,0,0,0.2);
        }
.trend-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px;
            border-bottom: 1px solid var(--border-light);
        }
.trend-icon {
            font-size: 1.5rem;
            color: var(--accent);
            min-width: 40px;
        }
.trend-content {
            flex: 1;
        }
.trend-title {
            font-weight: 600;
            color: var(--text-light);
            margin-bottom: 4px;
        }
.trend-sub {
            color: rgba(226,232,240,0.6);
            font-size: 0.9rem;
        }
.update-time {
            text-align: center;
            color: rgba(226,232,240,0.5);
            font-size: 0.9rem;
            margin-top: 40px;
            padding: 20px 0;
            border-top: 1px solid var(--border-light);
        }
.ranking-hero h1 {
                font-size: 1.8rem;
            }
.rank-card {
                padding: 16px;
            }
.rank-number {
                font-size: 1.4rem;
                min-width: 40px;
                margin-right: 12px;
            }
.rank-score {
                min-width: 50px;
            }

/* --- 子页面追加 --- */
/* 页面专属补充样式 */
        .guide-hero {
            background: linear-gradient(135deg, rgba(15,23,42,0.95) 0%, rgba(34,211,238,0.15) 100%);
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
        }
.guide-hero::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(34,211,238,0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
.guide-section {
            padding: 70px 0;
        }
.guide-section:nth-of-type(even) {
            background: rgba(255,255,255,0.02);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }
.guide-card {
            background: rgba(15,23,42,0.6);
            border: 1px solid var(--border-light);
            border-radius: 16px;
            padding: 32px 28px;
            height: 100%;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
.guide-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(0,0,0,0.35);
        }
.guide-card-icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), rgba(34,211,238,0.2));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--bg-dark);
            margin-bottom: 18px;
            font-weight: 700;
        }
.guide-card h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 12px;
        }
.guide-card p, .guide-card li {
            font-size: 0.95rem;
            line-height: 1.7;
            color: rgba(226,232,240,0.8);
        }
.guide-card ul {
            padding-left: 18px;
            margin-bottom: 0;
        }
.guide-card li {
            margin-bottom: 6px;
        }
.step-number {
            display: inline-block;
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--bg-dark);
            font-weight: 700;
            font-size: 0.85rem;
            text-align: center;
            line-height: 26px;
            margin-right: 8px;
        }
.tips-box {
            background: rgba(34,211,238,0.08);
            border-left: 3px solid var(--primary);
            border-radius: 0 12px 12px 0;
            padding: 20px 24px;
            margin-top: 24px;
        }
.tips-box p {
            margin-bottom: 0;
            font-size: 0.95rem;
            color: rgba(226,232,240,0.85);
        }
.tips-box i {
            color: var(--primary);
            margin-right: 8px;
        }
.faq-item-51 {
            background: rgba(15,23,42,0.5);
            border: 1px solid var(--border-light);
            border-radius: 12px;
            padding: 24px;
            margin-bottom: 16px;
        }
.faq-item-51 h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-light);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
.faq-item-51 h4 i {
            color: var(--accent);
            font-size: 1rem;
        }
.faq-item-51 p {
            font-size: 0.92rem;
            color: rgba(226,232,240,0.75);
            line-height: 1.7;
            margin-bottom: 0;
        }
.shortcut-key {
            display: inline-block;
            background: rgba(34,211,238,0.15);
            border: 1px solid rgba(34,211,238,0.3);
            border-radius: 6px;
            padding: 2px 10px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--primary);
            margin: 0 2px;
        }

/* --- 子页面追加 --- */
/* 本页专属微调样式——不影响站点全局 */
    .about-hero {
      padding: 100px 0 60px;
      background: radial-gradient(ellipse at 20% 50%, rgba(34,211,238,0.12), transparent 60%),
                  radial-gradient(ellipse at 80% 20%, rgba(251,146,60,0.08), transparent 50%);
    }
.about-card {
      background: rgba(255,255,255,0.03);
      border: 1px solid var(--border-light);
      border-radius: 14px;
      padding: 28px 24px;
      height: 100%;
      transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
    }
.about-card:hover {
      transform: translateY(-4px);
      border-color: rgba(34,211,238,0.35);
      background: rgba(34,211,238,0.05);
    }
.about-icon {
      font-size: 2rem;
      color: var(--primary);
      margin-bottom: 14px;
      display: inline-block;
    }
.about-card h3 {
      font-size: 1.15rem;
      font-weight: 600;
      color: var(--text-light);
      margin-bottom: 10px;
    }
.about-card p {
      font-size: 0.92rem;
      color: rgba(226,232,240,0.75);
      line-height: 1.7;
      margin: 0;
    }
.section-tag {
      display: inline-block;
      background: rgba(34,211,238,0.1);
      color: var(--primary);
      font-size: 0.75rem;
      font-weight: 600;
      letter-spacing: 1px;
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 14px;
      text-transform: uppercase;
    }
.timeline-item {
      position: relative;
      padding-left: 28px;
      padding-bottom: 28px;
      border-left: 2px solid rgba(34,211,238,0.25);
    }
.timeline-item:last-child {
      border-left-color: transparent;
      padding-bottom: 0;
    }
.timeline-item::before {
      content: '';
      position: absolute;
      left: -7px;
      top: 4px;
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background: var(--primary);
      box-shadow: 0 0 12px rgba(34,211,238,0.6);
    }
.timeline-item h4 {
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-light);
      margin-bottom: 6px;
    }
.timeline-item p {
      font-size: 0.9rem;
      color: rgba(226,232,240,0.7);
      line-height: 1.65;
      margin: 0;
    }
.stat-block {
      background: rgba(34,211,238,0.06);
      border: 1px solid rgba(34,211,238,0.2);
      border-radius: 14px;
      padding: 20px;
      text-align: center;
    }
.stat-block .num {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.2;
    }
.stat-block .lbl {
      font-size: 0.8rem;
      color: rgba(226,232,240,0.7);
      margin-top: 4px;
    }

/* --- 子页面追加 --- */
.disclaimer-page {
      padding: 60px 0;
    }
.disclaimer-card {
      background: rgba(15, 23, 42, 0.6);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      padding: 32px;
      margin-bottom: 24px;
      box-shadow: var(--shadow-subtle);
    }
.disclaimer-card h2 {
      color: var(--primary);
      font-size: 1.4rem;
      font-weight: 700;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
.disclaimer-card h2 i {
      color: var(--accent);
    }
.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;
    }
.update-tag {
      display: inline-block;
      background: rgba(34, 211, 238, 0.15);
      color: var(--primary);
      padding: 4px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 20px;
    }
.alert-box {
      background: rgba(251, 146, 60, 0.1);
      border-left: 4px solid var(--accent);
      padding: 16px 20px;
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
      margin: 20px 0;
    }
.alert-box p {
      margin: 0;
      color: var(--text-light);
    }

/* --- 子页面追加 --- */
.privacy-section {
            padding: 60px 0;
        }
.privacy-card {
            background: rgba(15, 23, 42, 0.6);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 28px 30px;
            margin-bottom: 24px;
            transition: all 0.3s ease;
        }
.privacy-card:hover {
            border-color: rgba(34, 211, 238, 0.4);
            box-shadow: 0 0 0 1px rgba(34, 211, 238, 0.15), var(--shadow-subtle);
        }
.privacy-card h3 {
            color: var(--primary);
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
.privacy-card h3 i {
            font-size: 1.1rem;
            color: var(--accent);
        }
.privacy-card p {
            color: var(--text-light);
            line-height: 1.75;
            font-size: 0.95rem;
            opacity: 0.9;
            margin-bottom: 10px;
        }
.privacy-card ul {
            padding-left: 20px;
            color: var(--text-light);
            line-height: 1.8;
            font-size: 0.95rem;
            opacity: 0.9;
        }
.privacy-card ul li {
            margin-bottom: 6px;
        }
.privacy-card ul li::marker {
            color: var(--accent);
        }
.privacy-highlight {
            background: linear-gradient(135deg, rgba(34, 211, 238, 0.08), rgba(251, 146, 60, 0.08));
            border-left: 3px solid var(--primary);
            padding: 14px 18px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 18px 0;
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.7;
        }
.privacy-meta {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            color: rgba(226, 232, 240, 0.6);
            font-size: 0.85rem;
            margin-bottom: 30px;
        }
.privacy-meta span i {
            color: var(--accent);
            margin-right: 6px;
        }
.btn-contact-privacy {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
            padding: 8px 22px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            margin-top: 10px;
        }
.btn-contact-privacy:hover {
            background: rgba(34, 211, 238, 0.1);
            color: var(--primary);
            transform: translateY(-2px);
        }
.effective-date {
            color: var(--accent);
            font-weight: 600;
        }
.privacy-page-header {
            padding: 80px 0 40px;
            background: radial-gradient(ellipse at 50% 0%, rgba(34, 211, 238, 0.08), transparent 60%);
            border-bottom: 1px solid var(--border-light);
        }
.privacy-page-header .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 15px;
        }
.privacy-page-header .section-desc {
            max-width: 700px;
            margin: 0 auto;
            color: var(--text-light);
            opacity: 0.8;
            font-size: 1.05rem;
        }
.last-updated {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(34, 211, 238, 0.1);
            border: 1px solid rgba(34, 211, 238, 0.25);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-top: 20px;
        }
.last-updated i {
            font-size: 0.8rem;
        }
.table-of-contents {
            background: rgba(15, 23, 42, 0.4);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 24px 28px;
            margin-bottom: 40px;
        }
.table-of-contents h4 {
            color: var(--primary);
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 15px;
        }
.table-of-contents ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 8px 20px;
        }
.table-of-contents li a {
            color: var(--text-light);
            text-decoration: none;
            font-size: 0.9rem;
            opacity: 0.85;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all 0.2s ease;
            padding: 4px 0;
        }
.table-of-contents li a i {
            color: var(--accent);
            font-size: 0.7rem;
        }
.table-of-contents li a:hover {
            color: var(--primary);
            opacity: 1;
            padding-left: 4px;
        }
.privacy-page-header .section-title {
                font-size: 1.7rem;
            }
.privacy-card {
                padding: 20px 18px;
            }
.table-of-contents ul {
                grid-template-columns: 1fr;
            }

/* --- 子页面追加 --- */
/* 本页专属样式，自动合并 */
        .contact-hero { padding: 60px 0 30px; text-align: center; }
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; margin: 40px 0; }
.contact-item { background: rgba(255,255,255,0.03); border: 1px solid var(--border-light); border-radius: 12px; padding: 24px; transition: transform 0.2s; }
.contact-item:hover { transform: translateY(-4px); }
.contact-icon { width: 48px; height: 48px; border-radius: 50%; background: rgba(34,211,238,0.1); display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.contact-icon i { font-size: 20px; color: var(--primary); }
.contact-item h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; color: var(--text-light); }
.contact-item p { font-size: 14px; color: rgba(226,232,240,0.7); margin-bottom: 4px; }
.contact-item .small-text { font-size: 12px; color: rgba(226,232,240,0.5); }
.form-section { background: rgba(255,255,255,0.02); border: 1px solid var(--border-light); border-radius: 16px; padding: 40px; margin: 50px 0; }
.form-section h2 { font-size: 24px; font-weight: 700; margin-bottom: 8px; }
.form-group { margin-bottom: 20px; }
.form-group label { font-size: 14px; font-weight: 500; color: var(--text-light); margin-bottom: 8px; display: block; }
.form-control-51 { width: 100%; background: rgba(0,0,0,0.35); border: 1px solid var(--border-light); border-radius: 8px; padding: 12px 16px; color: var(--text-light); font-size: 14px; transition: border-color 0.2s; }
.form-control-51:focus { outline: none; border-color: var(--primary); }
.form-control-51::placeholder { color: rgba(255,255,255,0.4); }
select.form-control-51 option { background: var(--bg-dark); color: var(--text-light); }
.btn-submit { background: var(--primary); color: #0f172a; border: none; border-radius: 8px; padding: 12px 32px; font-weight: 600; font-size: 15px; transition: all 0.2s; }
.btn-submit:hover { background: #67e8f9; transform: translateY(-2px); box-shadow: 0 4px 20px rgba(34,211,238,0.3); }
.response-time { font-size: 13px; color: rgba(226,232,240,0.6); margin-top: 12px; }
.collab-list { list-style: none; padding: 0; margin: 20px 0 0; }
.collab-list li { padding: 12px 0; border-bottom: 1px solid var(--border-light); font-size: 14px; color: rgba(226,232,240,0.8); display: flex; align-items: center; }
.collab-list li:last-child { border-bottom: none; }
.collab-list li i { color: var(--primary); margin-right: 12px; font-size: 14px; }
.faq-mini { margin-top: 20px; }
.faq-mini-item { background: rgba(255,255,255,0.02); border-radius: 8px; padding: 16px; margin-bottom: 12px; }
.faq-mini-item h4 { font-size: 14px; font-weight: 600; margin-bottom: 6px; color: var(--primary); }
.faq-mini-item p { font-size: 13px; color: rgba(226,232,240,0.7); margin: 0; }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.accordion-header { background:transparent !important; }