#backTop{width:28px;height:28px;padding:10px;border-radius:4px;text-indent:-9999px;cursor:pointer;z-index:999999999;display:none;box-sizing:content-box;-webkit-box-sizing:content-box}#backTop.red{background:url(../images/uparr-48-w.png) center center no-repeat rgba(127,123,140,.9);border-radius:0}