#go_top {
    position: fixed;
    bottom: 100px;
    right: 25px;
    border: 1px solid #EFEFEF;
    color: #333;
    width: 60px;
    text-align: center;
    border-radius: 40px;
    height: 45px;
    cursor: pointer;
    font-size: 22px;
    padding-top: 15px;
    font-weight: bold;
    opacity: 0;
    background: rgba(120, 120, 120, 0.3) url(../../../img/icon/icon-fleche.svg) 20px 15px no-repeat;
    transform: rotate(-90deg);
    z-index: 10;
}