#BackToTop,
#BackToTop span { border-radius: 50%; -webkit-border-radius: 50%; -moz-border-radius: 50%; -o-border-radius: 50%; -ms-border-radius: 50%; }
#BackToTop { float: left; z-index: 5000; display: none; text-decoration: none; position: fixed; bottom: -42px; top: auto !important; left: 50%; margin-left: -36px; overflow: hidden; }
#BackToTop span { display: block; cursor: pointer; text-align: center; padding: 20px; opacity: 0.4; background-color: #000; }
#BackToTop:hover { opacity: 1; }
#BackToTop:hover span { opacity: 1; }
#BackToTop i { background-image: url("up-01.png"); background-position: center center; background-repeat: no-repeat; background-size: contain; display: block; height: 36px; width: 36px; position: relative; top: -16px; }