1.css代码

// 子绝父相
  .self-check-tag {
    display: inline-block;
    min-width: 132px;
    height: 32px;
    position: relative;

    .overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-color: gray;
      opacity: 0.1;
    }

2.效果