/* 全局样式已在 head 内联 */
body { min-height: 100vh; display: flex; flex-direction: column; }
main { flex: 1; max-width: 1200px; margin: 0 auto; padding: 2rem 1rem; width: 100%; }
.site-header, .page-header { text-align: center; margin-bottom: 3rem; padding: 2rem 1rem; background: #fff; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.1); }
h1 { font-size: 1.8rem; color: #2c3e50; margin-bottom: 1rem; }
.site-intro, .page-intro { font-size: 1rem; color: #555; line-height: 1.8; max-width: 800px; margin: 0 auto; }
section { margin-bottom: 3rem; }
h2 { font-size: 1.5rem; color: #34495e; margin-bottom: 1.5rem; padding-bottom: 0.5rem; border-bottom: 2px solid #3498db; }
.video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.5rem; }
.video-card { background: #fff; padding: 1.5rem; border-radius: 8px; 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 16px rgba(0,0,0,0.15); }
.video-card h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.video-card h3 a { color: #2c3e50; text-decoration: none; }
.video-card h3 a:hover { color: #3498db; }
.meta { font-size: 0.85rem; color: #7f8c8d; margin-bottom: 0.5rem; }
.desc, .summary { font-size: 0.95rem; color: #555; line-height: 1.6; }
.more-link { text-align: center; margin-top: 1.5rem; }
.more-link a { color: #3498db; text-decoration: none; font-weight: 500; }
.more-link a:hover { text-decoration: underline; }
.video-list { background: #fff; padding: 2rem; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.1); }
.video-item { padding: 1.5rem 0; border-bottom: 1px solid #ecf0f1; position: relative; }
.video-item:last-child { border-bottom: none; }
.rank { position: absolute; top: 1.5rem; right: 0; background: #e74c3c; color: #fff; padding: 0.2rem 0.6rem; border-radius: 4px; font-size: 0.85rem; font-weight: bold; }
.video-detail { background: #fff; padding: 2rem; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.1); }
.video-info { background: #ecf0f1; padding: 1.5rem; border-radius: 8px; margin-bottom: 2rem; }
.video-info p { margin: 0.5rem 0; }
footer { background: #2c3e50; color: #ecf0f1; text-align: center; padding: 1.5rem; margin-top: 3rem; }
@media (max-width: 768px) {
  h1 { font-size: 1.4rem; }
  h2 { font-size: 1.2rem; }
  .video-grid { grid-template-columns: 1fr; }
  main { padding: 1rem 0.5rem; }
}