/* 额外样式增强 */
body.ui-style-1 {
  font-size: 16px;
}

.container {
  animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.video-card {
  border: 1px solid #e8e8e8;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.video-card:hover {
  border-color: #1890ff;
}

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

  section {
    padding: 20px;
  }

  h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 20px;
  }
}