.main { padding: 2rem 0; min-height: calc(100vh - 200px); }
.section { margin-bottom: 3rem; }
.section h2 { font-size: 1.5rem; margin-bottom: 1rem; color: #222; border-left: 4px solid #0066cc; padding-left: 0.75rem; }
.hero { text-align: center; padding: 2rem 0; background: #fff; border-radius: 8px; margin-bottom: 2rem; }
.hero h1 { font-size: 1.8rem; color: #222; margin-bottom: 1rem; }
.hero-desc { color: #666; line-height: 1.8; max-width: 800px; margin: 0 auto; }
.video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.5rem; }
.video-card { background: #fff; padding: 1.25rem; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.08); transition: all 0.3s; }
.video-card:hover { transform: translateY(-4px); box-shadow: 0 4px 16px rgba(0,0,0,0.12); }
.video-card h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.video-card h3 a { color: #222; }
.video-card h3 a:hover { color: #0066cc; }
.video-card .meta { color: #999; font-size: 0.85rem; margin-bottom: 0.5rem; }
.video-card .desc { color: #666; font-size: 0.9rem; line-height: 1.6; }
.video-list { background: #fff; border-radius: 8px; padding: 1rem; }
.video-item { padding: 1.25rem; border-bottom: 1px solid #f0f0f0; }
.video-item:last-child { border-bottom: none; }
.video-item h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.video-item h3 a { color: #222; }
.video-item h3 a:hover { color: #0066cc; }
.video-item .meta { color: #999; font-size: 0.85rem; margin-bottom: 0.5rem; }
.video-item .desc { color: #666; font-size: 0.9rem; line-height: 1.6; }
.topic-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; }
.topic-item { background: #fff; padding: 1.5rem; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
.topic-item h3 { font-size: 1.2rem; margin-bottom: 0.75rem; }
.topic-item h3 a { color: #222; }
.topic-item h3 a:hover { color: #0066cc; }
.topic-item p { color: #666; line-height: 1.6; }
.more-link { text-align: center; margin-top: 1.5rem; }
.more-link a { display: inline-block; padding: 0.75rem 2rem; background: #0066cc; color: #fff; border-radius: 4px; transition: all 0.3s; }
.more-link a:hover { background: #0052a3; text-decoration: none; transform: translateY(-2px); }
.page-header { text-align: center; padding: 2rem 0; background: #fff; border-radius: 8px; margin-bottom: 2rem; }
.page-header h1 { font-size: 1.8rem; color: #222; margin-bottom: 0.75rem; }
.page-header p { color: #666; line-height: 1.8; }
.list-section { background: #fff; border-radius: 8px; padding: 1.5rem; }
.list-item { display: flex; gap: 1rem; padding: 1.25rem; border-bottom: 1px solid #f0f0f0; align-items: flex-start; }
.list-item:last-child { border-bottom: none; }
.list-item .rank, .list-item .year { font-size: 1.5rem; font-weight: bold; color: #0066cc; min-width: 60px; text-align: center; }
.list-content { flex: 1; }
.list-content h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.list-content h3 a { color: #222; }
.list-content h3 a:hover { color: #0066cc; }
.list-content .meta { color: #999; font-size: 0.85rem; margin-bottom: 0.25rem; }
.list-content .tags { color: #0066cc; font-size: 0.85rem; margin-bottom: 0.5rem; }
.list-content .desc { color: #666; font-size: 0.9rem; line-height: 1.6; }
.video-detail { background: #fff; border-radius: 8px; padding: 2rem; }
.detail-header h1 { font-size: 2rem; color: #222; margin-bottom: 1.5rem; padding-bottom: 1rem; border-bottom: 2px solid #f0f0f0; }
.detail-section { margin-bottom: 2.5rem; }
.detail-section h2 { font-size: 1.3rem; color: #222; margin-bottom: 1rem; }
.detail-info { background: #f8f9fa; padding: 1.5rem; border-radius: 8px; margin-bottom: 2rem; }
.info-list { display: grid; grid-template-columns: 100px 1fr; gap: 0.75rem; }
.info-list dt { font-weight: bold; color: #666; }
.info-list dd { color: #333; }
.highlight { font-size: 1.1rem; color: #0066cc; line-height: 1.8; padding: 1rem; background: #f0f8ff; border-radius: 8px; border-left: 4px solid #0066cc; }
.summary p, .review p { margin-bottom: 1rem; line-height: 1.8; color: #333; text-indent: 2em; }
.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 1.25rem; }
.related-card { background: #f8f9fa; padding: 1rem; border-radius: 8px; transition: all 0.3s; }
.related-card:hover { background: #e9ecef; }
.related-card h3 { font-size: 1rem; margin-bottom: 0.5rem; }
.related-card h3 a { color: #222; }
.related-card h3 a:hover { color: #0066cc; }
.related-card .meta { color: #999; font-size: 0.8rem; margin-bottom: 0.5rem; }
.related-card .desc { color: #666; font-size: 0.85rem; line-height: 1.5; }
.footer { background: #2c3e50; color: #ecf0f1; padding: 2rem 0; margin-top: 3rem; text-align: center; }
.footer p { font-size: 0.9rem; }
@media (max-width: 768px) {
  .hero h1, .page-header h1 { font-size: 1.3rem; }
  .detail-header h1 { font-size: 1.5rem; }
  .video-grid { grid-template-columns: 1fr; }
  .info-list { grid-template-columns: 80px 1fr; gap: 0.5rem; }
  .related-grid { grid-template-columns: 1fr; }
  .list-item { flex-direction: column; gap: 0.5rem; }
  .list-item .rank, .list-item .year { min-width: auto; text-align: left; }
}