.toTop{
    position: fixed;
    width:36px;
    height:36px;
    right: 54px;
    bottom:54px;
    display: none;
    z-index: 100;
}
.toTop:hover{
    cursor: pointer;
}

.QR_code{
    position: fixed;
    width: 150px;
    left: 10px;
    bottom: 54px;
    /*transform: translateY(-50%);*/
    z-index: 100;
    /*display: none;*/
}