.UIBackTopTopControl {
        background: #2579ea url(images/totop.png) no-repeat center;
    bottom: 15%;
width: 50px;
    height: 50px;
    position: fixed;
    right: 2%;
    z-index: 10;
        box-shadow: 2px 3px 0 rgba(0, 0, 0, 0.2);
        border-radius: 100%;
        opacity: 0.8
}