/* 基础样式已在内联CSS中定义 */

body.ui-style-0 {
  font-size: 16px;
}

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

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

/* 卡片悬停效果 */
main section > div > div:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* 响应式优化 */
@media (max-width: 640px) {
  h1 { font-size: 28px !important; }
  h2 { font-size: 22px !important; }
  h3 { font-size: 18px !important; }
}

/* 返回顶部按钮 */
#backToTop {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: #2563eb;
  color: white;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  z-index: 1000;
}

#backToTop:hover {
  background: #1e40af;
}