#scroll-backtop {
   position:fixed;
   right:15px;
   bottom:15px;
   cursor:pointer;
   width:40px;
   height:40px;
   background-color:#3498db;
   text-indent:-9999px;
   display:none;
   -webkit-border-radius:60px;
   -moz-border-radius:60px;
   border-radius:60px
}
#scroll-backtop span {
   position:absolute;
   top:50%;
   left:50%;
   margin-left:-8px;
   margin-top:-12px;
   height:0;
   width:0;
   border:8px solid transparent;
   border-bottom-color:#ffffff;
}
#scroll-backtop:hover {
   background-color:#e74c3c;
   opacity:1;filter:"alpha(opacity=100)";
   -ms-filter:"alpha(opacity=100)";
   /* transform: translate3d(0, -5px, 0); */
   /* -webkit-transform: translate3d(0, -5px, 0); */
}