纯CSS手风琴效果

<div>
	<div class="box">
		<div class="item"><img src="img/2.jpg"></div>
		<div class="item"><img src="img/3.jpg"></div>
		<div class="item"><img src="img/4.jpg"></div>
		<div class="item"><img src="img/5.jpg"></div>
	</div>
</div>

样式如下：
<style type="text/css">
*{
	margin: 0;
	padding: 0;
}
.box{
	box-sizing: content-box;
	width: 800px;
	height: 300px;
	border:1px solid black;
	display:flex;
	flex-direction: row;
	margin: 50px auto
}
.item{
	box-sizing: border-box;
	width: 200px;
	overflow: hidden;
}
img{
	width: 260px;
	height: 300px;
}
.box:hover .item{
	width: 180px;
}
.box .item:hover{
	width: 260px;
}
</style>