vant/packages/vant-css/src/badge.css

@import './common/var.css';
@import './mixins/border_retina.css';

@component-namespace van {
  @b badge-group {
    position: relative;
    width: 85px;
    &::after {
      @mixin border-retina (top);
    }
  }

  @b badge {
    display: block;
    overflow: hidden;
    position: relative;
    padding: 20px 12px;
    box-sizing: border-box;
    line-height: 1.4;
    background-color: $c-background;
    color: $c-gray-darker;
    font-size: 14px;
    text-decoration: none;
    word-break: break-all;

    @m select {
      font-weight: bold;
      color: $c-black;
      background-color: $c-white;
      .van-badge__active {
        display: block;
      }
      &::after {
        @mixin border-retina (top);
        @mixin border-retina (right);
        @mixin border-retina (left);
      }
    }

    @e active {
      display: none;
      position: absolute;
      left: 0;
      top: 0;
      width: 3px;
      height: 100%;
      background-color: #FF4444;
    }

    @e info {
      position: absolute;
      top: 2px;
      right: 2px;
      font-size: 10px;
      transform:scale(0.8);
      text-align: center;
      box-sizing: border-box;
      padding: 0 6px;
      min-width: 18px;
      height: 18px;
      line-height: 18px;
      border-radius: 9px;
      background-color: #FF4444;
      color: $c-white;
    }

    &::after {
      @mixin border-retina (bottom);
    }

    &:last-child {
      &::after {
        border-bottom: 0;
      }
    }
  }
}