#gotop {
    position:fixed;
    z-index:90;
    right:30px;
    bottom:31px;
    display:none;
    width:40px;
    height:40px;
    color:#fff;
    background:#33b5e5;
    line-height:40px;
    border-radius:50%;
    transition:all 0.5s;
    text-align: center;
    box-shadow: 0 2px 5px 0 rgba(0,0,0,0.16), 0 2px 10px 0 rgba(0,0,0,0.12);
}
#gotop :hover{
    /*background:#0099CC;*/
	background:#FF8000;
}