.ic-jump-to-top {
    width: 40px;
    line-height: 40px;
    overflow: hidden;
    z-index: 999;
    display: none;
    cursor: pointer;
    position: fixed;
    bottom: 2%;
    right: 50%;
    background-color: #DDD;
    color: #555;
    text-align: center;
    font-size: 15px;
    text-decoration: none;
}
.ic-jump-to-top:hover {
    background-color: #DDF;
    color: #000;
}