body {
	height:600px;
}
* {
	margin:0;
	padding:0;
}
ul,li {
	list-style:none;
}
.slider {
	width:500px;
	height:300px;
	position:relative;
	margin:0 auto;
}
.slider-outer {
	width:100%;
	height:100%;
}
.img {
	}.slider-item {
	width:75px;
	height:100%;
	position:absolute;
	transform-style:preserve-3d;
	transform:rotateX(0deg);
	transition:all 1s;
}
.img {
	width:100%;
	height:100%;
	display:inline-block;
	position:absolute;
}
.slider-item .img:nth-child(1) {
	background:url("http://www.jq22.com/img/cs/500x300-1.png") no-repeat;
	transform:rotateX(0deg) translateZ(180px);
}
.slider-item .img:nth-child(2) {
	background:url("http://www.jq22.com/img/cs/500x300-2.png") no-repeat;
	transform:rotateX(90deg) translateZ(180px);
}
.slider-item .img:nth-child(3) {
	background:url("http://www.jq22.com/img/cs/500x300-3.png") no-repeat;
	transform:rotateX(180deg) translateZ(180px);
}
.slider-item .img:nth-child(4) {
	background:url("http://www.jq22.com/img/cs/500x300-4.png") no-repeat;
	transform:rotateX(270deg) translateZ(180px);
}
.arrow {
	top:50%;
	margin-top:-25px;
	width:100%;
	display:flex;
	position:absolute;
	justify-content:space-between;
	font-size:30px;
}
#prev,#next {
	width:50px;
	height:50px;
	background-color:rgba(21,21,21,0.3);
	line-height:50px;
	color:#ffffff;
	border-radius:6px;
	text-align:center;
	cursor:pointer;
}