:root { color-scheme: dark light; }
body { background-color: var(--bg-color, #fff); color: var(--text-color, #000); }
.loading { display: flex; justify-content: center; align-items: center; height: 100vh; }
.spinner { width: 48px; height: 48px; border: 4px solid rgba(59, 130, 246, 0.3); border-radius: 50%; border-top-color: rgb(59, 130, 246); animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
/* 添加首屏关键样式 */
.hero-section {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.card {
  background-color: var(--card-bg, #fff);
  border-radius: 0.5rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.12);
  transition: transform 0.2s, box-shadow 0.2s;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}
/* 移动端优化样式 */
@media (max-width: 768px) {
  .hero-section { min-height: 50vh; }
  .container { padding-left: 1rem; padding-right: 1rem; }
  .card { padding: 1rem; }
  .grid { gap: 1rem; }
  .spinner { width: 36px; height: 36px; border-width: 3px; }
}
/* 添加触摸优化 */
@media (pointer: coarse) {
  button, a { 
    min-height: 44px; 
    min-width: 44px;
    touch-action: manipulation;
  }
  input, select, textarea {
    font-size: 16px; /* 防止iOS缩放 */
  }
}