#back-to-top{position:fixed;z-index:999;display:none;bottom:15px;right:25px;cursor:pointer}#back-to-top p{width:50px;height:50px;display:block;color:#fff;background:#999;text-align:center;font-size:16px;line-height:50px;border-radius:5px;-webkit-transition:.3s all;-moz-transition:.3s all;-ms-transition:.3s all;-o-transition:.3s all;transition:.3s all}#back-to-top p:hover{background:#00689f}