方法1：
.border_top {
background: url("data:image/svg+xml;utf8,") no-repeat;
}
.border_bottom {
background: url("data:image/svg+xml;utf8,") no-repeat;
}
.border_left {
background: url("data:image/svg+xml;utf8,") no-repeat;
}
.border_right {
background: url("data:image/svg+xml;utf8,") no-repeat;
}
方法2：
.border-bottom,.border-top{position:?relative;}.border-bottom:after,.border-top:before{content:?'';position:?absolute;width:?200%;height:?1px;background:?#eee;-webkit-transform:?scale(0.5);transform:?scale(0.5);z-index:?1;}.border-bottom:after{bottom:?0;left:?0;-webkit-transform-origin:?0?100%;transform-origin:?0?100%;}.border-top:before{top:?0;left:?0;-webkit-transform-origin:?0?0;transform-origin:?0?0;}
1????h8
