message: Loading: fix white spinner color
diff: }
  &.van-loading__spinner--white {
  - border-color: rgba(0, 0, 0, .5);
  - border-top-color: transparent;
  + border-color: rgba(0, 0, 0, .1);
  + border-top-color: rgba(255, 255, 255, .7);
  }
  }
  