#goTop {
    position: fixed;
    z-index: 9999;
    right: 20px;
    bottom: 20px;
    background-color: #5397f0;
    color: #fff;
    width: 40px;
    height: 40px;
    text-align: center;
    line-height: 40px;
    opacity: 0.6;
    border-radius: 100%;
    font-size: 20px;
    cursor: pointer;
}
#goTop *{
    cursor: pointer;
}