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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  line-height: 1.6;
  color: #333;
  background: #f5f5f5;
}

.ui-style-0 body { background: #000; color: #fff; }
.ui-style-1 body { background: #1a1a1a; color: #fff; }
.ui-style-2 body { background: #fff; color: #333; }
.ui-style-3 body { background: #fff; color: #333; }
.ui-style-4 body { background: #fff; color: #333; }
.ui-style-5 body { background: #141414; color: #fff; }
.ui-style-6 body { background: #0f1419; color: #fff; }
.ui-style-7 body { background: #0f1419; color: #fff; }
.ui-style-8 body { background: #1a1a1a; color: #fff; }
.ui-style-9 body { background: #000; color: #fff; }
.ui-style-10 body { background: #fff; color: #333; }
.ui-style-11 body { background: #fff; color: #333; }
.ui-style-12 body { background: #fff; color: #333; }
.ui-style-13 body { background: #f4f5f7; color: #333; }
.ui-style-14 body { background: #fff; color: #333; }

.ui-style-0 .site-header { background: #000; border-bottom: 1px solid #333; }
.ui-style-1 .site-header { background: #1a1a1a; border-bottom: 1px solid #333; }
.ui-style-2 .site-header { background: #fff; border-bottom: 1px solid #e0e0e0; }
.ui-style-3 .site-header { background: #fff; border-bottom: 1px solid #e0e0e0; }
.ui-style-4 .site-header { background: #fff; border-bottom: 1px solid #e0e0e0; }
.ui-style-5 .site-header { background: #141414; border-bottom: 1px solid #2a2a2a; }
.ui-style-6 .site-header { background: #0f1419; border-bottom: 1px solid #2a3f5f; }
.ui-style-7 .site-header { background: #0f1419; border-bottom: 1px solid #2a3f5f; }
.ui-style-8 .site-header { background: #1a1a1a; border-bottom: 1px solid #00C75A; }
.ui-style-9 .site-header { background: #000; border-bottom: 1px solid #222; }
.ui-style-10 .site-header { background: #00C75A; border-bottom: none; }
.ui-style-11 .site-header { background: #fff; border-bottom: 1px solid #e0e0e0; }
.ui-style-12 .site-header { background: #fff; border-bottom: 1px solid #e0e0e0; }
.ui-style-13 .site-header { background: #fff; border-bottom: 1px solid #e0e0e0; }
.ui-style-14 .site-header { background: #fff; border-bottom: 1px solid #e0e0e0; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo {
  font-size: 24px;
  font-weight: bold;
  white-space: nowrap;
}

.ui-style-10 .logo { color: #fff; }
.ui-style-11 .logo { color: #0099FF; }
.ui-style-12 .logo { color: #FF6700; }
.ui-style-13 .logo { color: #00A1D6; }

.main-nav {
  display: flex;
  gap: 8px;
  align-items: center;
  white-space: nowrap;
  overflow: hidden;
  flex-wrap: nowrap;
}

.nav-link {
  padding: 8px 12px;
  text-decoration: none;
  color: inherit;
  border-radius: 6px;
  transition: all 0.2s;
  font-size: 14px;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  background: rgba(255, 255, 255, 0.1);
}

.ui-style-2 .nav-link:hover,
.ui-style-3 .nav-link:hover,
.ui-style-4 .nav-link:hover,
.ui-style-11 .nav-link:hover,
.ui-style-12 .nav-link:hover,
.ui-style-13 .nav-link:hover,
.ui-style-14 .nav-link:hover {
  background: rgba(0, 0, 0, 0.05);
}

.hero-section {
  padding: 60px 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  text-align: center;
}

.ui-style-10 .hero-section { background: linear-gradient(135deg, #00C75A 0%, #00a049 100%); }
.ui-style-11 .hero-section { background: linear-gradient(135deg, #0099FF 0%, #0077cc 100%); }
.ui-style-12 .hero-section { background: linear-gradient(135deg, #FF6700 0%, #dd5500 100%); }
.ui-style-13 .hero-section { background: linear-gradient(135deg, #00A1D6 0%, #FB7299 100%); }

.main-title {
  font-size: 32px;
  font-weight: bold;
  margin-bottom: 16px;
}

.intro-section {
  padding: 40px 0;
  background: rgba(255, 255, 255, 0.05);
}

.ui-style-2 .intro-section,
.ui-style-3 .intro-section,
.ui-style-4 .intro-section,
.ui-style-11 .intro-section,
.ui-style-12 .intro-section,
.ui-style-13 .intro-section,
.ui-style-14 .intro-section {
  background: rgba(0, 0, 0, 0.02);
}

.intro-section p {
  font-size: 16px;
  line-height: 1.8;
  color: inherit;
  opacity: 0.9;
}

.video-section {
  padding: 40px 0;
}

.section-title {
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 24px;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.video-card {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
}

.ui-style-2 .video-card,
.ui-style-3 .video-card,
.ui-style-4 .video-card,
.ui-style-11 .video-card,
.ui-style-12 .video-card,
.ui-style-13 .video-card,
.ui-style-14 .video-card {
  background: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.video-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.video-card__link {
  text-decoration: none;
  color: inherit;
  display: block;
}

.video-cover {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #333;
  position: relative;
}

.video-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.video-info {
  padding: 16px;
}

.video-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.video-one-line {
  font-size: 14px;
  opacity: 0.8;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.page-header {
  padding: 40px 0;
  text-align: center;
}

.page-header h1 {
  font-size: 36px;
  margin-bottom: 16px;
}

.page-header p {
  font-size: 16px;
  opacity: 0.8;
}

.top-list__items {
  list-style: none;
  padding: 0;
}

.top-list-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  margin-bottom: 16px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  transition: all 0.3s;
}

.ui-style-2 .top-list-item,
.ui-style-3 .top-list-item,
.ui-style-4 .top-list-item,
.ui-style-11 .top-list-item,
.ui-style-12 .top-list-item,
.ui-style-13 .top-list-item,
.ui-style-14 .top-list-item {
  background: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.top-list-item:hover {
  transform: translateX(8px);
}

.rank-badge {
  font-size: 28px;
  font-weight: bold;
  min-width: 50px;
  text-align: center;
  color: #667eea;
}

.ui-style-10 .rank-badge { color: #00C75A; }
.ui-style-11 .rank-badge { color: #0099FF; }
.ui-style-12 .rank-badge { color: #FF6700; }
.ui-style-13 .rank-badge { color: #00A1D6; }

.video-cover-small {
  width: 120px;
  aspect-ratio: 16 / 9;
  border-radius: 8px;
  overflow: hidden;
  background: #333;
  flex-shrink: 0;
}

.video-cover-small img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-info-main {
  flex: 1;
}

.video-info-main .video-title {
  margin-bottom: 8px;
}

.video-info-main .video-title a {
  text-decoration: none;
  color: inherit;
}

.video-info-main .video-title a:hover {
  text-decoration: underline;
}

.video-meta {
  font-size: 13px;
  opacity: 0.6;
  margin-bottom: 8px;
}

.video-player-section {
  background: #000;
  padding: 0;
}

.video-player {
  max-width: 1200px;
  margin: 0 auto;
}

.video-player-inner {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  background: #000;
  overflow: hidden;
}

.player-play-btn {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 80px;
  height: 80px;
  background: rgba(255, 255, 255, 0.9);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.player-play-btn:hover {
  background: #fff;
  transform: translate(-50%, -50%) scale(1.1);
}

.player-play-icon {
  font-size: 32px;
  color: #333;
  margin-left: 4px;
}

.detail-page {
  padding-bottom: 60px;
}

.detail-title {
  font-size: 32px;
  font-weight: bold;
  margin: 32px 0;
}

.detail-module {
  margin-bottom: 32px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 12px;
}

.ui-style-2 .detail-module,
.ui-style-3 .detail-module,
.ui-style-4 .detail-module,
.ui-style-11 .detail-module,
.ui-style-12 .detail-module,
.ui-style-13 .detail-module,
.ui-style-14 .detail-module {
  background: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.detail-module h2 {
  font-size: 20px;
  margin-bottom: 16px;
  color: #667eea;
}

.ui-style-10 .detail-module h2 { color: #00C75A; }
.ui-style-11 .detail-module h2 { color: #0099FF; }
.ui-style-12 .detail-module h2 { color: #FF6700; }
.ui-style-13 .detail-module h2 { color: #00A1D6; }

.detail-module p {
  line-height: 1.8;
  margin-bottom: 12px;
}

.info-list {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 12px;
  line-height: 1.8;
}

.info-list dt {
  font-weight: 600;
  opacity: 0.7;
}

.tags-container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-block;
  padding: 6px 12px;
  background: rgba(102, 126, 234, 0.1);
  border: 1px solid rgba(102, 126, 234, 0.3);
  border-radius: 16px;
  font-size: 14px;
}

.ui-style-10 .tag { background: rgba(0, 199, 90, 0.1); border-color: rgba(0, 199, 90, 0.3); }
.ui-style-11 .tag { background: rgba(0, 153, 255, 0.1); border-color: rgba(0, 153, 255, 0.3); }
.ui-style-12 .tag { background: rgba(255, 103, 0, 0.1); border-color: rgba(255, 103, 0, 0.3); }
.ui-style-13 .tag { background: rgba(0, 161, 214, 0.1); border-color: rgba(0, 161, 214, 0.3); }

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.video-card--related {
  margin-bottom: 0;
}

.site-footer {
  padding: 40px 0;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 60px;
  opacity: 0.6;
}

.ui-style-2 .site-footer,
.ui-style-3 .site-footer,
.ui-style-4 .site-footer,
.ui-style-11 .site-footer,
.ui-style-12 .site-footer,
.ui-style-13 .site-footer,
.ui-style-14 .site-footer {
  border-top: 1px solid rgba(0, 0, 0, 0.1);
}

@media (max-width: 768px) {
  .site-header .container {
    flex-direction: column;
    gap: 12px;
  }

  .main-nav {
    width: 100%;
    justify-content: space-between;
    gap: 4px;
  }

  .nav-link {
    padding: 8px;
    font-size: 13px;
  }

  .main-title {
    font-size: 24px;
  }

  .video-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 16px;
  }

  .video-cover {
    aspect-ratio: 3 / 4;
  }

  .video-info {
    padding: 12px;
  }

  .video-title {
    font-size: 14px;
  }

  .video-one-line {
    font-size: 12px;
  }

  .top-list-item {
    flex-direction: column;
    text-align: center;
  }

  .video-cover-small {
    width: 100%;
    max-width: 200px;
  }

  .detail-title {
    font-size: 24px;
  }

  .info-list {
    grid-template-columns: 80px 1fr;
    gap: 8px;
  }

  .related-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  }
}