移动端1px的终极版解决方案

/* 使用时候加上这个类就好了border-1px top-1px bottom-1px topBottom-1px left-1px right-1px  less sass 版本*/
.border-1px, .top-1px, .bottom-1px, .topBottom-1px, .left-1px, .right-1px {
  position: relative;
}

/* 全边框 */
.border-1px {
  &:before {
    .allBorder();
  }
}

/* 上边框 */
.top-1px {
  &:before {
    .topBorder();
  }
}

/* 下边框 */
.bottom-1px {
  &:after {
    .bottomBorder();
  }
}

/* 上下边框 */
.topBottom-1px {
  &:before {
    .topBorder();
  }
  &:after {
    .bottomBorder();
  }
}

/* 左边框 */
.left-1px {
  &:before {
    .leftBorder();
  }
}

/* 右边框 */
.right-1px {
  &:after {
    .rightBorder();
  }
}

.allBorder(@color: #eee) {
  content: " ";
  position: absolute;
  left: 0;
  top: 0;
  width: 200%;
  border: 1px solid @color;
  color: @color;
  height: 200%;
  transform-origin: left top;
  transform: scale(0.5);
}

.topBorder(@color: #eee) {
    content: " ";
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    height: 1px;
    border-top: 1px solid @color;
    color: @color;
    transform-origin: 0 0;
    transform: scaleY(0.5);
}

.bottomBorder(@color: #eee) {
    content: " ";
    position: absolute;
    left: 0;
    bottom: 0;
    right: 0;
    height: 1px;
    border-bottom: 1px solid @color;
    color: @color;
    transform-origin: 0 100%;
    transform: scaleY(0.5);
}

.leftBorder(@color: #eee) {
    content: " ";
    position: absolute;
    left: 0;
    top: 0;
    width: 1px;
    bottom: 0;
    border-left: 1px solid @color;
    color: @color;
    transform-origin: 0 0;
    transform: scaleX(0.5);
}

.rightBorder(@color: #eee) {
    content: " ";
    position: absolute;
    right: 0;
    top: 0;
    width: 1px;
    bottom: 0;
    border-right: 1px solid @color;
    color: @color;
    transform-origin: 100% 0;
    transform: scaleX(0.5);
}

/*    px2remLoader 插件下转换
    const px2remLoader = {
      loader:'px2rem-loader',
      options:{
        remUnit:75
      }
    } 
css 版本
*/

.border-1px:before {
    content: " ";
    position: absolute;
    left: 0;
    top: 0;
    width: 200%;
    border: 0.013333rem solid #eee;
    color: #eee;
    height: 200%;
    -webkit-transform-origin: left top;
    transform-origin: left top;
    -webkit-transform: scale(0.5);
    transform: scale(0.5);
}

.top-1px:before {
    content: " ";
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    height: 0.013333rem;
    border-top: 0.013333rem solid #eee;
    color: #eee;
    -webkit-transform-origin: 0 0;
    transform-origin: 0 0;
    -webkit-transform: scaleY(0.5);
    transform: scaleY(0.5);
}

.bottom-1px:after {
    content: " ";
    position: absolute;
    left: 0;
    bottom: 0;
    right: 0;
    height: 0.013333rem;
    border-bottom: 0.013333rem solid #eee;
    color: #eee;
    -webkit-transform-origin: 0 100%;
    transform-origin: 0 100%;
    -webkit-transform: scaleY(0.5);
    transform: scaleY(0.5);
}

.topBottom-1px:before {
    content: " ";
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    height: 0.013333rem;
    border-top: 0.013333rem solid #eee;
    color: #eee;
    -webkit-transform-origin: 0 0;
    transform-origin: 0 0;
    -webkit-transform: scaleY(0.5);
    transform: scaleY(0.5);
}

.topBottom-1px:after {
    content: " ";
    position: absolute;
    left: 0;
    bottom: 0;
    right: 0;
    height: 0.013333rem;
    border-bottom: 0.013333rem solid #eee;
    color: #eee;
    -webkit-transform-origin: 0 100%;
    transform-origin: 0 100%;
    -webkit-transform: scaleY(0.5);
    transform: scaleY(0.5);
}

.left-1px:before {
    content: " ";
    position: absolute;
    left: 0;
    top: 0;
    width: 0.013333rem;
    bottom: 0;
    border-left: 0.013333rem solid #eee;
    color: #eee;
    -webkit-transform-origin: 0 0;
    transform-origin: 0 0;
    -webkit-transform: scaleX(0.5);
    transform: scaleX(0.5);
}

.right-1px:after {
    content: " ";
    position: absolute;
    right: 0;
    top: 0;
    width: 0.013333rem;
    bottom: 0;
    border-right: 0.013333rem solid #eee;
    color: #eee;
    -webkit-transform-origin: 100% 0;
    transform-origin: 100% 0;
    -webkit-transform: scaleX(0.5);
    transform: scaleX(0.5);
}