yueche_app/uni_modules/wot-design-uni/components/wd-backtop/index.scss

@import '../common/abstracts/variable';
@import '../common/abstracts/mixin';

@include b(backtop) {
  position: fixed;
  background-color: $-backtop-bg;
  width: 40px;
  height: 40px;
  display: flex;
  justify-content: center;
  align-items: center;
  color: $-color-gray-8;

  @include edeep(backicon) {
    font-size: $-backtop-icon-size;
  }

  @include when(circle) {
    border-radius: 50%;
  }

  @include when(square) {
    border-radius: 4px;
  }
}