.goTop {
  position: fixed;
  width: 50px;
  height: 50px;
  line-height: 50px;
  text-align: center;
  background-color: #008000;
  cursor: pointer;
  z-index: 1;
  bottom: 236px;
  right: 17px;
  border-radius: 50%;
  color: #ffc0cb;
  z-index: 999;
}
@media (max-width: 551px) {
  .goTop {
    width: 35px;
    height: 35px;
    line-height: 35px;
    right: 0px;
    bottom: 186px;
  }
}