.space-top {
  margin-top: 30px;
}
.space-top-60 {
  margin-top: 60px;
}

#pagetop > .pagetop-btn {
  display: block;
  z-index: 10;
  background-color: #2f68b3;
  border-radius: 50%;
  bottom: 60px;
  height: 60px;
  position: fixed;
  text-align: center;
  right: 20px;
  width: 60px;
  transition: .3s;
}
#pagetop > .pagetop-btn:hover {
  opacity: .8;
}
#pagetop > .pagetop-btn i::before {
  color: #fff;
  position: absolute;
  top: 50%;
  -webkit-transform: translateY(-52%);
  transform: translateY(-52%);
  left: 0;
  right: 0;
}

@media screen and (max-width: 1024px) {
  #pagetop > .pagetop-btn {
    bottom: 90px;
    right: 20px;
  }
  #pagetop > .pagetop-btn:hover {
    opacity: 1;
  }
}

@media screen and (max-width: 599px) {
  #pagetop > .pagetop-btn {
    bottom: 60px;
    height: 40px;
    right: 10px;
    width: 40px;
  }
}