.gotop {
  display: none;
  position: fixed;
  bottom: 60px;
  right: 0;
  width: 30px;
  height: 30px;
  text-align: center;
  line-height: 30px;
  color: #fff;
  background-color: #000;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}