.demo a {
position: absolute;
bottom: 20px;
left: 50%;
z-index: 2;
display: inline-block;
-webkit-transform: translate(0, -50%);
transform: translate(0, -50%);
color: #fff!important;
font : normal 400 20px/1 ‘Josefin Sans’, sans-serif;
letter-spacing: .1em;
text-decoration: none;
transition: opacity .3s;
}
.demo a:hover {
opacity: .5;
}

#hero_scroll a {
padding-top: 60px;
}
#hero_scroll a span {
position: absolute;
top: 0;
left: 50%;
width: 46px;
height: 46px;
margin-left: -23px;
border: 1px solid #fff;
border-radius: 100%;
box-sizing: border-box;
}
#hero_scroll a span::after {
position: absolute;
top: 50%;
left: 50%;
content: ”;
width: 16px;
height: 16px;
margin: -12px 0 0 -8px;
border-left: 1px solid #fff;
border-bottom: 1px solid #fff;
-webkit-transform: rotate(-45deg);
transform: rotate(-45deg);
box-sizing: border-box;
}
#hero_scroll a span::before {
position: absolute;
top: 0;
left: 0;
z-index: -1;
content: ”;
width: 44px;
height: 44px;
box-shadow: 0 0 0 0 rgba(255,255,255,.1);
border-radius: 100%;
opacity: 0;
-webkit-animation: sdb03 3s infinite;
animation: sdb03 3s infinite;
box-sizing: border-box;
}
@-webkit-keyframes sdb03 {
0% {
opacity: 0;
}
30% {
opacity: 1;
}
60% {
box-shadow: 0 0 0 60px rgba(255,255,255,.1);
opacity: 0;
}
100% {
opacity: 0;
}
}
@keyframes sdb03 {
0% {
opacity: 0;
}
30% {
opacity: 1;
}
60% {
box-shadow: 0 0 0 60px rgba(255,255,255,.1);
opacity: 0;
}
100% {
opacity: 0;
}
}