#gotoTop{
    position: fixed;
    right: 20px;
    bottom: 80px;
    width: 46px;
    height: 46px;
    font-size: 40px;
    text-align: center;
    text-decoration: none;
    color: #eee;
    background-color: #777;    
    opacity: .8;
}
#gotoTop:hover{
    background-color: #333;
}