/* Loading容器样式 */
#loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #efefef;
  z-index: 9999;
  display: none;
  justify-content: center;
  align-items: center;
  transition: opacity 0.3s;
}

/* 旋转动画样式 */
.spinner {
  width: 50px;
  height: 50px;
  border: 5px solid white;
  border-top: 5px solid #3498db;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* 显示时样式 */
.active {
  display: flex !important;
  opacity: 1;
}