.clearfix:after{/*伪元素是行内元素 正常浏览器清除浮动方法*/
    content: "";
    display: block;
    clear:both;
    visibility: hidden;
}
.padding-left-0{
    padding-left:0;
}
.padding-right-0{
    padding-right:0;
}

.clearfix:after{content:"";display:block;clear:both;visibility:hidden}.padding-left-0{padding-left:0}.padding-right-0{padding-right:0}