/* 全局样式 */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.video-card {
  background: #fff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  transition: transform 0.2s, box-shadow 0.2s;
}

.video-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.video-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
  color: #222;
}

.video-card .meta {
  color: #888;
  font-size: 13px;
  margin-bottom: 10px;
}

.video-card .desc {
  color: #666;
  font-size: 14px;
  line-height: 1.6;
}

.video-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.video-item {
  background: #fff;
  padding: 20px;
  border-radius: 6px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
}

.video-item h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.video-item .meta {
  color: #888;
  font-size: 13px;
  margin-bottom: 8px;
}

.video-item .desc {
  color: #666;
  font-size: 14px;
  line-height: 1.6;
}

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

  main {
    padding: 20px 15px !important;
  }

  h1 {
    font-size: 24px !important;
  }

  h2 {
    font-size: 20px !important;
  }
}

/* UI风格变体 */
.ui-style-0 { --primary-color: #0066cc; }
.ui-style-1 { --primary-color: #1a73e8; }
.ui-style-2 { --primary-color: #2196f3; }
.ui-style-3 { --primary-color: #00897b; }
.ui-style-4 { --primary-color: #43a047; }
.ui-style-5 { --primary-color: #00acc1; }
.ui-style-6 { --primary-color: #039be5; }
.ui-style-7 { --primary-color: #1976d2; }
.ui-style-8 { --primary-color: #0288d1; }
.ui-style-9 { --primary-color: #0097a7; }
.ui-style-10 { --primary-color: #00796b; }
.ui-style-11 { --primary-color: #388e3c; }
.ui-style-12 { --primary-color: #689f38; }
.ui-style-13 { --primary-color: #0277bd; }
.ui-style-14 { --primary-color: #01579b; }
.ui-style-15 { --primary-color: #006064; }