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>