/* 额外样式 */
body.ui-style-7 .section {
  animation: fadeIn 0.6s ease-in;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.video-card a {
  display: block;
  color: inherit;
}

.video-card a:hover .video-title {
  color: #667eea;
}

@media (max-width: 768px) {
  .video-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 1.5rem;
  }

  .section {
    padding: 1.5rem;
  }
}