.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

@media (max-width: 768px) {
  .video-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

.video-card {
  background: #fff;
  padding: 24px;
  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, .video-card h4 {
  font-size: 18px;
  margin-bottom: 12px;
  color: #212529;
  line-height: 1.4;
}

.video-card h3 a, .video-card h4 a {
  color: inherit;
  transition: color 0.2s;
}

.video-card h3 a:hover, .video-card h4 a:hover {
  color: #d32f2f;
}

.video-meta {
  font-size: 13px;
  color: #6c757d;
  margin-bottom: 12px;
}

.video-desc {
  font-size: 14px;
  color: #495057;
  line-height: 1.6;
  margin-bottom: 16px;
}

.read-more {
  font-size: 14px;
  color: #d32f2f;
  font-weight: 500;
  transition: color 0.2s;
}

.read-more:hover {
  color: #a02020;
}

.ui-style-4 {
  /* UI 风格变体样式 */
}

.layout-D {
  /* 布局变体样式 */
}