@include b(tag) {
  position: relative;
  padding: 3px 6px;
  border-radius: 3px;
  color: #fff;
  font-size: 12px;
  &-hairline::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    border: 1px solid currentColor;
    border-radius: 5px;
  }
  &-round {
    border-radius: 10px;
  }
  &-mark {
    padding-right: 7px;
    border-radius: 0 10px 10px 0;
  }
  &-large {
    font-size: 16px;
  }
  &-medium {
    font-size: 14px;
  }
  &-mini {
    font-size: 10px;
  }
}