.go-top{
  display: block;
  width: 40px;
  height: 40px;
  line-height: 40px;
  text-align: center;
  font-size: 30px;
  position: fixed;
  bottom: -40px;
  right: 20px;
  -webkit-transition: all 1s ease;
  -moz-transition: all 1s ease;
  -o-transition: all 1s ease;
  transition: all 1s ease;
  background-color: #404040;
  color: #fff;
  text-decoration: none;
  -moz-border-radius: 5px;
  -webkit-border-radius: 5px;
  border-radius: 5px;
}

.go-top.show{
  bottom: 20px;
}

.go-top:hover{
  background-color: #5DBA9D;
  color: #fff;
}