.icon-scroll,
.icon-scroll:before {
position: absolute;
left: 50%;
}

.icon-scroll {
width: 40px;
height: 70px;
margin-left: -20px;
top: 50%;
margin-top: -35px;
box-shadow: inset 0 0 0 1px #000;
border-radius: 25px;
}

.icon-scroll:before {
content: '';
width: 8px;
height: 8px;
background: #000;
margin-left: -4px;
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);
}
}