/* === 全屏遮罩层 === */
#loadingMask {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5); /* 半透明背景 */
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

/* === 加载动画内容 === */
.loading-content {
  text-align: center;
  color: #fff;
}

/* === 转圈动画 === */
.spinner {
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  width: 48px;
  height: 48px;
  animation: spin 1s linear infinite;
  margin: 0 auto 10px;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}