*{
	margin: 0;
	padding: 0;
}

.box{
	width: 900px;
	height: 460px;
	margin: 200px auto;
	/*溢出部分隐藏*/
	overflow: hidden;
}
.box img{
	width: 640px;
	height: 360px;
}
li{
	list-style: none;
	width: 155px;
	height: 360px;
	float: left;
	border-left: 5px solid white;
	box-shadow: -5px 0px 10px black;
	transition: all 0.5s linear;
}
/*鼠标悬浮在ul上，让ul变小*/
.box ul:hover li{
	width: 35px;
}
/*鼠标悬浮到某个li上，让li变大*/
.box ul li:hover{
	width: 635px;
}