html5中相关的边框线

定义相关的边框线上边框
sect-con:before{
content: "";
display: block;
position: absolute;
left: 0px;
top: 0px;
200%;
height: 1px;
border-top: 1px solid #ccc;
transform: scale(0.5,0.5);
transform-origin: 0 0;
-webkit-transform: scale(0.5,0.5);
-webkit-transform-origin: 0 0;
box-sizing: border-box;
}