.section{position:relative}.paper div.sdwn,.section div.sdwn{-webkit-animation:bounce 2s infinite 2s;padding-top:3px;display:block;position:absolute;left:50%;margin-left:-15px;bottom:30px;background-color:#FFF;width:30px;height:30px;z-index:3;border-radius:15px;box-shadow:0 15px 20px rgba(0, 0, 0, .22);text-align:center;vertical-align:middle}div.sdwn{color:#000;cursor:pointer;text-decoration:none;transition:all .3s;font-size:larger}
@keyframes bounce {
    0%, 100%, 20%, 50%, 80% {
        -webkit-transform: translateY(0);
        -ms-transform: translateY(0);
        transform: translateY(0)
    }
    40% {
        -webkit-transform: translateY(-10px);
        -ms-transform: translateY(-10px);
        transform: translateY(-10px)
    }
    60% {
        -webkit-transform: translateY(-5px);
        -ms-transform: translateY(-5px);
        transform: translateY(-5px)
    }
}