#totop{position:fixed;right:30px;z-index:999999999999;bottom:30px;display:none;outline:none;background:#888;width:35px;height:35px;text-align:center;color:#fff;padding:8px;font-size:15px;-webkit-transition:all .1s linear 0s;-moz-transition:all .1s linear 0s;-o-transition:all .1s linear 0s;transition:all .1s linear 0s}#totop:hover{background:#555;display:block}