#page-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  font-size: 14px;
  line-height: 1;
  z-index: 99;
}
#page-top a {
  background: #666;
  text-decoration: none;
  color: #fff;
  width: 60px;
  padding: 28px 5px;
  text-align: center;
  display: block;
  border-radius: 90px;
  opacity: 0.9;
  transition: all .3s ease;
}
#page-top a:hover {
  text-decoration: none;
  opacity: .5;
}