.scroll-arrows path {
	stroke: #FFF;
	fill: transparent;
	stroke-width: 1px;
	animation: arrow 2s infinite;
	-webkit-animation: arrow 2s infinite;
}

@keyframes arrow
{
	0% {opacity:0}
	40% {opacity:1}
	80% {opacity:0}
	100% {opacity:0}
}

@-webkit-keyframes arrow /*Safari and Chrome*/
{
	0% {opacity:0}
	40% {opacity:1}
	80% {opacity:0}
	100% {opacity:0}
}

.scroll-arrows path.a1 {
	animation-delay:-1s;
	-webkit-animation-delay:-1s; /* Safari 和 Chrome */
}

.scroll-arrows path.a2 {
	animation-delay:-0.5s;
	-webkit-animation-delay:-0.5s; /* Safari 和 Chrome */
}

.scroll-arrows path.a3 {
	animation-delay:0s;
	-webkit-animation-delay:0s; /* Safari 和 Chrome */
}