body.ui-style-1 {
  --primary-color: #1890ff;
  --secondary-color: #52c41a;
  --bg-color: #f5f5f5;
  --card-bg: #ffffff;
  --text-color: #333;
  --border-color: #e8e8e8;
}

.site-header {
  text-align: center;
  padding: 40px 0 20px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  margin: -20px -20px 30px;
  border-radius: 0 0 16px 16px;
}

.site-header h1 {
  color: white;
  font-size: 28px;
  font-weight: 600;
}

.site-intro {
  background: var(--card-bg);
  padding: 24px;
  border-radius: 8px;
  margin-bottom: 30px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  line-height: 1.8;
}

section {
  margin-bottom: 40px;
}

section h2 {
  font-size: 22px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary-color);
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.video-card {
  background: var(--card-bg);
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  transition: all 0.3s;
  position: relative;
}

.video-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}

.video-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.video-card .meta {
  color: #888;
  font-size: 13px;
  margin-bottom: 8px;
}

.video-card .oneline {
  font-size: 14px;
  color: #666;
  line-height: 1.6;
}

.video-card .rank {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--primary-color);
  color: white;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 16px;
}

.page-header {
  background: var(--card-bg);
  padding: 30px;
  border-radius: 8px;
  margin-bottom: 30px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.page-header h1 {
  font-size: 28px;
  margin-bottom: 12px;
}

.page-header .desc {
  font-size: 15px;
  color: #666;
  line-height: 1.8;
}

.video-list {
  background: var(--card-bg);
  border-radius: 8px;
  padding: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.video-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--border-color);
}

.video-item:last-child {
  border-bottom: none;
}

.video-item h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.video-item .meta {
  color: #888;
  font-size: 14px;
  margin-bottom: 8px;
}

.video-item .summary {
  font-size: 14px;
  color: #666;
  line-height: 1.6;
}

.video-detail {
  background: var(--card-bg);
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.video-detail h1 {
  font-size: 28px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--primary-color);
}

.basic-info {
  background: #f9f9f9;
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 24px;
}

.basic-info p {
  margin-bottom: 8px;
  line-height: 1.8;
}

.oneline-section,
.summary-section,
.review-section {
  margin-bottom: 24px;
}

.oneline-section h2,
.summary-section h2,
.review-section h2 {
  font-size: 20px;
  margin-bottom: 12px;
}

.oneline-section p,
.summary-section p,
.review-section p {
  line-height: 1.8;
  font-size: 15px;
  color: #555;
}

.related-section {
  margin-top: 40px;
  padding-top: 30px;
  border-top: 2px solid var(--border-color);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 16px;
}

.related-item {
  padding: 16px;
  background: #f9f9f9;
  border-radius: 8px;
  transition: all 0.3s;
}

.related-item:hover {
  background: #f0f0f0;
}

.related-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.related-item p {
  font-size: 14px;
  color: #666;
  line-height: 1.6;
}

@media (max-width: 768px) {
  .site-header h1 {
    font-size: 22px;
  }

  .video-grid {
    grid-template-columns: 1fr;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }

  section h2 {
    font-size: 20px;
  }
}