._container{
	height:530px;
	overflow:hidden;
	text-align:center;
}
._container li{
	height:530px;
	position:relative;
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	align-items: center;
	
}
._container li:first-child{
	margin-top:0;
	transition:margin-top .8s;
}