手机端一像素问题

//以下代码是使用sylus实现

border-1px($color){
    position:relative;
    &:after{
        display:block;
        position:absolute;
        left:0;
        bottom:0;
        border-top:1px solid $color;
        content:‘ ‘;
        width:100%;
    }
}


//解决办法
@media (-webkit-min-device-pixel-ratio: 1.5),(min-device-pixel-ratio: 1.5)
  .border-1px
    &::after
      -webkit-transform: scaleY(0.7)
      transform: scaleY(0.7)

@media (-webkit-min-device-pixel-ratio: 2),(min-device-pixel-ratio: 2)
  .border-1px
    &::after
      -webkit-transform: scaleY(0.5)
      transform: scaleY(0.5)

<div class="tab border-1px"></div>