.UIBackTopTopControl {
  background: #ffbe22 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%;
}