@arco-design/web-react/lib/BackTop/style/index.less

Arco Design React UI Library.

@import './token.less';

@backtop-prefix-cls: ~'@{prefix}-backtop';

.@{backtop-prefix-cls} {
  position: fixed;
  bottom: @backtop-margin-bottom;
  right: @backtop-margin-right;
  z-index: 100;
  cursor: pointer;

  &-button {
    width: @backtop-button-size-width;
    height: @backtop-button-size-width;
    font-size: @backtop-button-size-font;
    text-align: center;
    outline: none;
    background-color: @backtop-button-color-bg;
    border-radius: @backtop-button-border-radius;
    color: @backtop-button-color-text;
    transition: all @transition-duration-2 @transition-timing-function-linear;
    cursor: pointer;
    border: none;

    &:focus-visible {
      box-shadow: 0 0 0 2px var(~'@{arco-cssvars-prefix}-color-primary-light-3');
    }

    &:hover {
      background-color: @backtop-button-color-bg_hover;
    }

    svg {
      font-size: @backtop-button-size-icon;
    }
  }
}