移动端1像素的边框

.border:after{
    content: " ";
    width: 200%;
    height: 200%;
    position: absolute;
    top: 0;
    left: 0;
    border: 1px solid rgba(0,0,0,.2);
    -webkit-transform: scale(.5);
    transform: scale(.5);
    -webkit-transform-origin: 0 0;
    transform-origin: 0 0;
    box-sizing: border-box;
    border-radius: 10px;

}

.border{positon:relative}

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转载自blog.csdn.net/m0_37633370/article/details/77838360