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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background: #f5f5f5;
}

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

.site-header {
  background: #fff;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.site-logo a {
  font-size: 1.5rem;
  font-weight: bold;
  color: #333;
  text-decoration: none;
}

.main-nav {
  display: flex;
  gap: 2rem;
  white-space: nowrap;
}

.main-nav a {
  color: #666;
  text-decoration: none;
  transition: color 0.3s;
}

.main-nav a:hover,
.main-nav a.active {
  color: #007bff;
}

.main-content {
  min-height: 60vh;
  padding: 2rem 0;
}

.hero-section {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 3rem 0;
  margin-bottom: 2rem;
}

.hero-section h1 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.hero-desc {
  font-size: 1.1rem;
  opacity: 0.9;
}

.site-intro {
  background: white;
  padding: 2rem 0;
  margin-bottom: 2rem;
}

.site-intro p {
  line-height: 1.8;
  color: #555;
}

.video-section {
  margin-bottom: 3rem;
}

.section-title {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  padding-left: 0.5rem;
  border-left: 4px solid #007bff;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.5rem;
}

.video-card {
  background: white;
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
}

.video-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

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

.video-cover {
  width: 100%;
  aspect-ratio: 3/4;
  overflow: hidden;
  background: #eee;
}

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

.video-info {
  padding: 1rem;
}

.video-title {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  color: #333;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.video-one-line {
  font-size: 0.9rem;
  color: #666;
  margin-bottom: 0.5rem;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.video-meta {
  display: flex;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: #999;
}

.video-meta span {
  padding: 0.2rem 0.5rem;
  background: #f0f0f0;
  border-radius: 4px;
}

.page-header {
  margin-bottom: 2rem;
}

.page-header h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.page-header p {
  color: #666;
}

.page--with-sidebar {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 2rem;
}

.layout__side--filters {
  background: white;
  padding: 1.5rem;
  border-radius: 8px;
  height: fit-content;
}

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

.top-list__item {
  display: flex;
  gap: 1rem;
  background: white;
  padding: 1rem;
  margin-bottom: 1rem;
  border-radius: 8px;
  align-items: center;
}

.top-rank {
  font-size: 1.5rem;
  font-weight: bold;
  color: #007bff;
  min-width: 40px;
}

.top-cover {
  width: 80px;
  height: 120px;
  flex-shrink: 0;
}

.top-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 4px;
}

.top-info {
  flex: 1;
}

.top-info h3 {
  margin-bottom: 0.5rem;
}

.top-info a {
  color: #333;
  text-decoration: none;
}

.top-info a:hover {
  color: #007bff;
}

.group {
  margin-bottom: 3rem;
}

.group__title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #007bff;
}

.group__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.5rem;
}

.video-player-section {
  background: #000;
  padding: 2rem 0;
  margin-bottom: 2rem;
}

.video-player {
  max-width: 900px;
  margin: 0 auto;
}

.video-player-inner {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
}

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

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

.player-play-icon {
  font-size: 2rem;
  color: #007bff;
}

.detail-header {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  margin-bottom: 2rem;
}

.detail-header h1 {
  font-size: 2rem;
}

.detail-module {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  margin-bottom: 2rem;
}

.detail-module h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: #333;
}

.info-list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.5rem 1rem;
}

.info-list dt {
  font-weight: bold;
  color: #666;
}

.info-list dd {
  color: #333;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  padding: 0.4rem 0.8rem;
  background: #f0f0f0;
  border-radius: 20px;
  font-size: 0.9rem;
  color: #666;
}

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

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

.site-footer {
  background: #333;
  color: white;
  padding: 2rem 0;
  text-align: center;
  margin-top: 4rem;
}

@media (max-width: 768px) {
  .main-nav {
    gap: 0.5rem;
    font-size: 0.9rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .main-nav::-webkit-scrollbar {
    display: none;
  }

  .hero-section h1 {
    font-size: 1.3rem;
  }

  .hero-desc {
    font-size: 1rem;
  }

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

  .page--with-sidebar {
    grid-template-columns: 1fr;
  }

  .video-cover {
    aspect-ratio: 3/4;
    max-height: 45vh;
  }

  .video-info {
    padding: 0.8rem;
  }

  .top-list__item {
    flex-direction: column;
    align-items: flex-start;
  }
}

.ui-style-0 body { background: #1a1a1a; color: #fff; }
.ui-style-0 .site-header { background: #2a2a2a; }
.ui-style-0 .site-logo a, .ui-style-0 .main-nav a { color: #fff; }
.ui-style-0 .video-card, .ui-style-0 .detail-module { background: #2a2a2a; }

.ui-style-5 .hero-section { background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%); }
.ui-style-10 .hero-section { background: linear-gradient(135deg, #00C75A 0%, #00a048 100%); }
.ui-style-13 .hero-section { background: linear-gradient(135deg, #00A1D6 0%, #FB7299 100%); }