移动端一像素边框的问题

.row {
  position: relative;
  &:after{
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    width: 200%;
    border-bottom:1px solid #e6e6e6;
    color: red;
    height: 200%;
    -webkit-transform-origin: left top;
    transform-origin: left top;
    -webkit-transform: scale(0.5);
    transform: scale(0.5);
    pointer-events: none; /* 防止点击触发 */
    box-sizing: border-box;
  }
}