.arrow-scroll-top {
  background: url("../../../../../image/up-arrow.gif") no-repeat scroll 0 0 transparent;
  bottom: 60px;
  color: #FF891B;
  cursor: pointer;
  display: block;
  font-weight: bold;
  height: 25px;
  line-height: 30px;
  opacity: 0.6;
  position: fixed;
  left: 50px;
  text-align: center;
  width: 80px;
}

.arrow-scroll-top:hover {
    opacity:1;   
}