.container { max-width: 1200px; margin: 0 auto; padding: 2rem 1rem; }
.hero { text-align: center; padding: 3rem 1rem; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: #fff; border-radius: 8px; margin-bottom: 2rem; }
.hero h1 { font-size: 2rem; margin-bottom: 1rem; }
.hero-desc { font-size: 1rem; line-height: 1.8; max-width: 800px; margin: 0 auto; opacity: 0.95; }
.section { margin-bottom: 3rem; background: #fff; padding: 2rem; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.05); }
.section h2 { font-size: 1.5rem; margin-bottom: 1.5rem; color: #667eea; border-left: 4px solid #667eea; padding-left: 1rem; }
.video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.5rem; }
.video-card { background: #f9f9f9; padding: 1.5rem; border-radius: 8px; transition: transform 0.3s, box-shadow 0.3s; }
.video-card:hover { transform: translateY(-4px); box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
.video-card h3 { margin-bottom: 0.5rem; }
.video-card h3 a { color: #333; text-decoration: none; font-size: 1.1rem; }
.video-card h3 a:hover { color: #667eea; }
.video-card .meta { color: #666; font-size: 0.9rem; margin-bottom: 0.5rem; }
.video-card .desc { color: #555; font-size: 0.95rem; line-height: 1.6; }
.video-list { display: flex; flex-direction: column; gap: 1rem; }
.video-item { background: #f9f9f9; padding: 1.5rem; border-radius: 8px; }
.video-item h3 { margin-bottom: 0.5rem; }
.video-item h3 a { color: #333; text-decoration: none; font-size: 1.1rem; }
.video-item h3 a:hover { color: #667eea; }
.video-item .meta { color: #666; font-size: 0.9rem; margin-bottom: 0.5rem; }
.video-item .desc { color: #555; line-height: 1.6; }
.topic-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; }
.topic-card { background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%); color: #fff; padding: 2rem; border-radius: 8px; }
.topic-card h3 { margin-bottom: 1rem; }
.topic-card h3 a { color: #fff; text-decoration: none; font-size: 1.3rem; }
.topic-card h3 a:hover { text-decoration: underline; }
.more-link { margin-top: 1.5rem; text-align: center; }
.more-link a { color: #667eea; text-decoration: none; margin: 0 0.5rem; }
.more-link a:hover { text-decoration: underline; }
.page-header { text-align: center; margin-bottom: 2rem; }
.page-header h1 { font-size: 2rem; color: #333; margin-bottom: 1rem; }
.video-list-page { display: flex; flex-direction: column; gap: 1.5rem; }
.video-item-detailed { display: flex; gap: 1rem; background: #f9f9f9; padding: 1.5rem; border-radius: 8px; align-items: flex-start; }
.video-item-detailed .rank { font-size: 2rem; font-weight: bold; color: #667eea; min-width: 3rem; text-align: center; }
.video-item-detailed .video-info { flex: 1; }
.video-item-detailed h3 { margin-bottom: 0.5rem; }
.video-item-detailed h3 a { color: #333; text-decoration: none; font-size: 1.2rem; }
.video-item-detailed h3 a:hover { color: #667eea; }
.video-item-detailed .meta { color: #666; font-size: 0.9rem; margin-bottom: 0.5rem; }
.video-item-detailed .desc { color: #555; margin-bottom: 0.5rem; line-height: 1.6; }
.video-item-detailed .summary { color: #666; font-size: 0.9rem; line-height: 1.6; }
.video-detail { background: #fff; padding: 2rem; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.05); }
.video-detail header h1 { font-size: 2rem; margin-bottom: 1rem; color: #333; }
.breadcrumb { color: #666; font-size: 0.9rem; margin-bottom: 1.5rem; }
.breadcrumb a { color: #667eea; text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.video-info-section, .video-highlight, .video-summary, .video-review, .related-videos { margin-bottom: 2rem; }
.video-info-section h2, .video-highlight h2, .video-summary h2, .video-review h2, .related-videos h2 { font-size: 1.3rem; margin-bottom: 1rem; color: #667eea; border-left: 4px solid #667eea; padding-left: 1rem; }
.info-list { list-style: none; }
.info-list li { padding: 0.5rem 0; border-bottom: 1px solid #f0f0f0; }
.video-highlight p, .video-summary p, .video-review p { line-height: 1.8; color: #555; }
.site-footer { background: #333; color: #fff; text-align: center; padding: 2rem 1rem; margin-top: 3rem; }
@media (max-width: 768px) {
  .hero h1 { font-size: 1.5rem; }
  .hero-desc { font-size: 0.95rem; }
  .container { padding: 1rem 0.5rem; }
  .section { padding: 1.5rem; }
  .video-grid { grid-template-columns: 1fr; }
  .topic-grid { grid-template-columns: 1fr; }
}