@import url('https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css');

.UIBackTopTopControl {
    /* background: rgba(0, 0, 0, 0) url("https://storage-vnportal.vnpt.vn/agg-sgd/sitefolders/cdngheangiang/11347/top.png") no-repeat scroll center center; */
    background: #3db2ff;
    bottom: 3%;
    height: 40px;
    position: fixed;
    right: 15px;
    width: 40px;
    z-index: 10;
    border-radius: 50%;
}

.UIBackTopTopControl::before {
    font-family: FontAwesome;
    content: "\f062";
    color: #fff;
    position: absolute;
    left: 0;
    right: 0;
    text-align: center;
    top: 50%;
    transform: translateY(-50%);
}

@media only screen and (max-width: 768px) {
    div.UIBackTopTopControl {
        position: fixed !important;
        min-width: 40px !important;
        max-width: 40px !important;
        min-height: 40px;
        max-height: 40px;
    }
}