.top-img {
  position: fixed;
  width: 0.1rem;
  height: 1.32rem;
  right: 0.3rem;
  bottom: 0.2rem;
  z-index: 999;
  font-size: 0.36rem;
  color: rgb(102, 102, 102, 0.5);
  cursor: pointer;
}
.top-img:hover {
  content: url("../../assets/img/pc/home/top-red.png");
}