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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  color: #333;
  background: #fff;
}

body.ui-style-12 {
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  color: #2c3e50;
}

.header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 1rem 0;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.nav {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.nav a {
  color: rgba(255,255,255,0.9);
  text-decoration: none;
  transition: color 0.3s;
  white-space: nowrap;
}

.nav a:hover {
  color: #fff;
}

.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 4rem 0;
  color: #fff;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.2rem;
  opacity: 0.9;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 20px;
}

.section {
  margin-bottom: 3rem;
}

.section-title {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  color: #2c3e50;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
}

.video-card {
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  transition: transform 0.3s, box-shadow 0.3s;
}

.video-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

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

.video-cover {
  position: relative;
  padding-top: 56.25%;
  overflow: hidden;
  background: #f0f0f0;
}

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

.video-info {
  padding: 1rem;
}

.video-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: #2c3e50;
}

.video-one-line {
  font-size: 0.9rem;
  color: #666;
  line-height: 1.5;
}

.video-meta {
  font-size: 0.85rem;
  color: #999;
  margin-top: 0.5rem;
}

.site-intro {
  background: #fff;
  padding: 2rem;
  border-radius: 12px;
  margin-bottom: 3rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

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

.video-player {
  max-width: 1000px;
  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%);
  background: rgba(255,255,255,0.9);
  border: none;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  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: #667eea;
}

.detail-main {
  max-width: 1000px;
  margin: 0 auto;
}

.detail-title {
  font-size: 2.2rem;
  margin: 2rem 0 1rem;
  color: #2c3e50;
}

.info-block {
  background: #fff;
  padding: 1.5rem;
  border-radius: 12px;
  margin-bottom: 2rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.info-block h2 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: #667eea;
}

.info-item {
  margin-bottom: 0.8rem;
  line-height: 1.8;
}

.info-label {
  font-weight: 600;
  color: #555;
  margin-right: 0.5rem;
}

.content-module {
  background: #fff;
  padding: 1.5rem;
  border-radius: 12px;
  margin-bottom: 2rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.content-module h2 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: #667eea;
}

.content-module p {
  line-height: 1.8;
  color: #555;
}

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

.tag {
  background: #e8ecf1;
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  font-size: 0.9rem;
  color: #667eea;
}

.related-section {
  margin-top: 3rem;
}

.video-card--related {
  background: #f8f9fa;
}

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

.page-title {
  font-size: 2rem;
  color: #2c3e50;
  margin-bottom: 1rem;
}

.page-desc {
  color: #666;
  font-size: 1.1rem;
}

.footer {
  background: #2c3e50;
  color: #fff;
  padding: 2rem 0;
  text-align: center;
  margin-top: 4rem;
}

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

.top-item {
  background: #fff;
  margin-bottom: 1.5rem;
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.top-rank {
  font-size: 2rem;
  font-weight: bold;
  color: #667eea;
  min-width: 50px;
}

.top-cover {
  width: 120px;
  height: 68px;
  border-radius: 8px;
  overflow: hidden;
  flex-shrink: 0;
}

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

.top-info {
  flex: 1;
}

.top-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: #2c3e50;
}

.sidebar-right {
  width: 300px;
  background: #fff;
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.layout-with-sidebar {
  display: flex;
  gap: 2rem;
}

.main-content {
  flex: 1;
}

@media (max-width: 768px) {
  .nav {
    gap: 0.8rem;
    font-size: 0.9rem;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

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

  .layout-with-sidebar {
    flex-direction: column;
  }

  .sidebar-right {
    width: 100%;
  }

  .video-cover {
    padding-top: 45%;
  }

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