.icon-scroll,
.icon-scroll:before {
  position: absolute;
}
.icon-scroll {
  width: 40px;
  height: 70px;
  bottom: 28px;
  margin-top: -35px;
  box-shadow: inset 0 0 0 2px #fff;
  border-radius: 25px;
  left: calc(50% - 20px);
}
.icon-scroll:before {
  content: '';
  width: 8px;
  height: 8px;
  background: #fff;
  margin-left: 16px;
  top: 8px;
  border-radius: 4px;
  -webkit-animation-duration: 1.5s;
          animation-duration: 1.5s;
  -webkit-animation-iteration-count: infinite;
          animation-iteration-count: infinite;
  -webkit-animation-name: scroll;
          animation-name: scroll;
}
@-webkit-keyframes scroll {
  0% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    -webkit-transform: translateY(46px);
            transform: translateY(46px);
  }
}
@keyframes scroll {
  0% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    -webkit-transform: translateY(46px);
            transform: translateY(46px);
  }
}