.icon-scroll {
    position: absolute;
    top: 80%;
    left: 50%;
    margin-left: -8px;
    width: 16px;
    height: 50px;
    z-index: 99999;
    -webkit-transition: opacity: .4s;
}
.icon-scroll span {
    display: block;
    width: 5px;
    height: 5px;
    border-right: 1px solid #000;
    border-bottom: 1px solid #000;
    margin: 0 0 2px 5px;
    -webkit-transform: rotate(45deg);
    -ms-transform: rotate(45deg);
    transform: rotate(45deg);
    -webkit-animation: mouse-scroll 1s infinite;
    -moz-animation: mouse-scroll 1s infinite;
    animation: mouse-scroll 1s infinite;
    -webkit-animation-direction: alternate;
    animation-direction: alternate;
}
.icon-scroll .a1 {
    margin-top: 6px;
    -webkit-animation-delay: .1s;
    -moz-animation-delay: .1s;
    animation-delay: .1s;
}
.icon-scroll .a2 {
    -webkit-animation-delay: .2s;
    -moz-animation-delay: .2s;
    animation-delay: .2s;
}
.icon-scroll .a3 {
    -webkit-animation-delay: .3s;
    -moz-animation-delay: .3s;
    animation-delay: .3s;
}
.icon-scroll .mouse {
    height: 22px;
    width: 14px;
    border: 1px solid #000;
    border-radius: 10px;
}
.icon-scroll .wheel {
    position: relative;
    display: block;
    height: 3px;
    width: 3px;
    margin: 2px auto 0;
    background: #000;
    -webkit-animation: mouse-wheel 1.2s ease infinite;
    -moz-animation: mouse-wheel 1.2s ease infinite;
    animation: mouse-wheel 1.2s ease infinite;
    border-radius: 50%;
}
@-webkit-keyframes mouse-wheel {
    0% {
        opacity: 1;
        -webkit-transform: translateY(0);
        transform: translateY(0);
    }
    100% {
        opacity: 0;
        -webkit-transform: translateY(5px);
        transform: translateY(5px);
    }
}
@-moz-keyframes mouse-wheel {
    0% {
        opacity: 1;
        -moz-transform: translateY(0);
        transform: translateY(0);
    }
    100% {
        opacity: 0;
        -moz-transform: translateY(5px);
        transform: translateY(5px);
    }
}
@keyframes mouse-wheel {
    0% {
        opacity: 1;
        transform: translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateY(6px);
    }
}
@-webkit-keyframes mouse-scroll {
    0% {
        opacity: 0;
    }
    50% {
        opacity: .5;
    }
    100% {
        opacity: 1;
    }
}
@-moz-keyframes mouse-scroll {
    0% {
        opacity: 0;
    }
    50% {
        opacity: .5;
    }
    100% {
        opacity: 1;
    }
}
@keyframes mouse-scroll {
    0% {
        opacity: 0;
    }
    50% {
        opacity: .5;
    }
    100% {
        opacity: 1;
    }
}