#container.clearfix::after{content:"";display:block;width:100%;height:100%;background:#fff;position:absolute;top:0;left:0;clear:none;visibility:visible;z-index:999}#container.clearfix::before{opacity:0}#container.clearfix.fadeout::after{transition:all 0.5s ease}#container.clearfix.hide::before{opacity:1}#container.clearfix.hide::after{background:transparent;height:0}