.back_to_top {
     position: relative;
     z-index: 900;
     display: none;
     cursor: pointer;
 }

.back_to_top img {
    position: fixed;
    /*bottom: 20px;*/
    bottom: 150px;
    right: 30px;
    cursor: pointer;
    opacity: 0.5;
    width: 48px;
}
.geoe-tt img {
    right: 35px !important;
}
.back_to_top img:active {
    opacity: 1;
}