message: fix: stylelint error
diff: @import '../../style/index.scss';
  -$tree: 'hi-tree';
  +$tree: 'hi-tree' !default;
  .hi-tree {
  font-size: 14px;
  @@ -177,15 +177,15 @@ $tree: 'hi-tree';
  }
  &.gap-bottom {
  - border-bottom-color: red;
  + border-bottom-color: #f00;
  }
  &.gap-enter {
  - background-color: yellow;
  + background-color: #ff0;
  }
  &.gap-top {
  - border-top-color: red;
  + border-top-color: #f00;
  }
  }
  