message: Loading: update document
diff: }
  .van-loading {
  -
  - line-height: 0;
  font-size: 0;
  &--circle {
  }
  &__spinner {
  - display: inline-block;
  - height: 100%;
  width: 100%;
  - animation: van-loading 0.8s linear;
  - animation-iteration-count: infinite;
  + height: 100%;
  + display: inline-block;
  + animation: van-loading 0.8s linear infinite;
  &--circle {
  border-radius: 100%;
  