.to_top {
  cursor: pointer;
  position: fixed;
  right: 46px;
  bottom: 498px;
  width: 64px;
  height: 64px;
  background: url(../img/toTop.png) rgba(25, 6, 61, 0.19);
  background-size: 100%;
  border-radius: 46px;
}
.to_top:hover {
  background-image: url(../img/toTop_active.png);
}
@media screen and (max-width: 750px) {
  .to_top {
    cursor: pointer;
    position: fixed;
    right: 10px;
    bottom: 60px;
    width: 20px;
    height: 20px;
    background: url(../img/toTop.png) rgba(25, 6, 61, 0.19);
    background-size: 100%;
    border-radius: 46px;
  }
  .to_top:hover {
    background-image: url(../img/toTop_active.png);
  }
}