ant-design/components/anchor/style/index.less

@import "../../style/themes/default";
@import "../../style/mixins/index";

@anchor-border-width: 2px;

.@{ant-prefix}-anchor {
  .reset-component;
  position: relative;
  padding-left: @anchor-border-width;
  &-wrapper {
    background-color: @component-background;
  }

  &-ink {
    position: absolute;
    height: 100%;
    left: 0;
    top: 0;
    &:before {
      content: ' ';
      position: relative;
      width: @anchor-border-width;
      height: 100%;
      display: block;
      background-color: @border-color-split;
      margin: 0 auto;
    }
    &-ball {
      display: none;
      position: absolute;
      width: 8px;
      height: 8px;
      border-radius: 8px;
      border: 2px solid @primary-color;
      background-color: @component-background;
      left: 50%;
      transition: top .3s ease-in-out;
      transform: translateX(-50%);
      &.visible {
        display: inline-block;
      }
    }
  }

  &.fixed &-ink &-ink-ball {
    display: none;
  }

  &-link {
    padding: 8px 0 8px 16px;
    line-height: 1;

    &-title {
      display: block;
      position: relative;
      transition: all .3s;
      color: @text-color;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      margin-bottom: 8px;

      &:only-child {
        margin-bottom: 0;
      }
    }

    &-active > &-title {
      color: @primary-color;
    }
  }

  &-link &-link {
    padding-top: 6px;
    padding-bottom: 6px;
  }
}