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

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

body.ui-style-14 {
  font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
  background: #ffffff;
  color: #333333;
}

.site-header {
  background: #2c5aa0;
  color: white;
  padding: 1rem 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.site-nav {
  display: flex;
  gap: 0.5rem;
  flex-wrap: nowrap;
  overflow: visible;
}

.site-nav a {
  color: white;
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  transition: background 0.3s;
  white-space: nowrap;
  font-size: 0.95rem;
}

.site-nav a:hover {
  background: rgba(255,255,255,0.1);
}

main {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1rem;
}

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

.page-header h1 {
  font-size: 2rem;
  color: #2c5aa0;
  margin-bottom: 0.5rem;
}

.site-intro {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  margin-bottom: 2rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

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

.section-title {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #2c5aa0;
  color: #333;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.5rem;
}

.video-card {
  background: white;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  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 {
  position: relative;
  width: 100%;
  padding-top: 140%;
  overflow: hidden;
  background: #e0e0e0;
}

.video-cover img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-info {
  padding: 1rem;
}

.video-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: #333;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-one-line, .video-meta {
  font-size: 0.875rem;
  color: #666;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-player-section {
  margin-bottom: 2rem;
}

.video-player {
  position: relative;
  width: 100%;
  max-width: 100%;
  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;
  background: rgba(255,255,255,0.9);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.3s;
}

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

.player-play-icon {
  font-size: 2rem;
  color: #2c5aa0;
}

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

.detail-header h1 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: #333;
}

.content-block {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  margin-bottom: 2rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.content-block h2 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: #2c5aa0;
}

.info-table {
  width: 100%;
}

.info-table tr {
  border-bottom: 1px solid #eee;
}

.info-table th {
  text-align: left;
  padding: 0.75rem 0;
  width: 100px;
  color: #666;
  font-weight: normal;
}

.info-table td {
  padding: 0.75rem 0;
}

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

.tag-item {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: #f0f0f0;
  border-radius: 16px;
  font-size: 0.875rem;
  color: #666;
}

.site-footer {
  background: #333;
  color: #ccc;
  text-align: center;
  padding: 2rem 0;
  margin-top: 3rem;
}

.back-to-top {
  position: fixed;
  right: 2rem;
  bottom: 2rem;
  width: 48px;
  height: 48px;
  background: #2c5aa0;
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
  transition: all 0.3s;
}

.back-to-top:hover {
  background: #1e3f6f;
  transform: translateY(-2px);
}

.page--grid .filter-bar {
  background: white;
  padding: 1rem 2rem;
  border-radius: 8px;
  margin-bottom: 2rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

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

.page--top .top-item {
  background: white;
  padding: 1.5rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  display: flex;
  gap: 1.5rem;
  align-items: center;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.top-rank {
  font-size: 2rem;
  font-weight: bold;
  color: #2c5aa0;
  min-width: 50px;
}

.top-item .video-cover {
  width: 120px;
  padding-top: 0;
  height: 160px;
  flex-shrink: 0;
}

.top-item .video-info {
  flex: 1;
  padding: 0;
}

@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    gap: 1rem;
  }

  .site-nav {
    width: 100%;
    justify-content: center;
    font-size: 0.85rem;
  }

  .site-nav a {
    padding: 0.4rem 0.6rem;
  }

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

  .video-cover {
    padding-top: 130%;
  }

  .page-header h1 {
    font-size: 1.5rem;
  }

  .section-title {
    font-size: 1.25rem;
  }

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

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