.dw-loading-mask {
  position: absolute;
  z-index: 2000;
  background-color: rgba(255, 255, 255, 0.9);
  margin: 0;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  transition: opacity 0.3s;
}
.dw-loading-spinner {
  position: absolute;
  /* 定位到父容器的中心点 */
  top: 50%;
  left: 50%;
  /* 核心：通过 transform 往回偏移自身的 50% */
  transform: translate(-50%, -50%);

  text-align: center;
  /* 不再需要 width: 100% 和 margin-top 的繁琐计算 */
}
.dw-loading-spinner .circular {
  display: inline;
  height: 50px;
  width: 50px;
  animation: loading-rotate 2s linear infinite;
}
.dw-loading-spinner .dw-loading-text {
  color: #409eff;
  margin: 3px 0;
  font-size: 14px;
}