/* 扩展样式 */
body.ui-style-13 {
  font-size: 16px;
}

section {
  animation: fadeIn 0.6s ease-in;
}

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

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

.video-card:hover {
  transform: translateY(-5px) scale(1.02);
  box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

a {
  transition: color 0.2s;
}

.logo:hover {
  opacity: 0.9;
}

/* 布局变体 G */
@media (min-width: 1024px) {
  .container {
    max-width: 1100px;
  }
}