a.scroll{padding-top:80px}a.scroll span{position:absolute;top:0;left:50%;width:24px;height:24px;margin-left:-12px;border-left:1px solid #fff;border-bottom:1px solid #fff;transform:rotate(-45deg);-webkit-animation:sdb 2s infinite;animation:sdb 2s infinite;opacity:0;box-sizing:border-box}a.scroll span:first-of-type{-webkit-animation-delay:0s;animation-delay:0s}a.scroll span:nth-of-type(2){top:16px;-webkit-animation-delay:.15s;animation-delay:.15s}a.scroll span:nth-of-type(3){top:32px;-webkit-animation-delay:.3s;animation-delay:.3s}@-webkit-keyframes sdb{0%{opacity:0}50%{opacity:1}to{opacity:0}}@keyframes sdb{0%{opacity:0}50%{opacity:1}to{opacity:0}}