:after伪类方法
.border-line{position:relative;}
.border-line:after{position: absolute; width: 100%; left: 0;bottom: 0; display: block;border-top: 1px solid rgba(7,17,27,0.1); content: ' ';}
:after伪类方法
.border-line{position:relative;}
.border-line:after{position: absolute; width: 100%; left: 0;bottom: 0; display: block;border-top: 1px solid rgba(7,17,27,0.1); content: ' ';}