* {
	margin:0;
	padding:0;
}
ul {
	list-style:none;
}
.clearfix {
	zoom:1;
}
.clearfix::after {
	display:block;
	content:'';
	clear:both;
	visibility:hidden;
}
.container {
	position:relative;
	width:620px; 
	height:300px;
	margin:100px auto;
	background:#ebeaeb;
	padding:30px;
	border-radius:20px;
}
.wrap {
	position:relative;
	width:620px;
	overflow:hidden;
}
.wrap ul {
	position:relative;
}
.wrap ul li {
	float:left;
	width:200px;
	height:300px;
	margin-right:30px;
	background:#999;
	text-align:center;
	font-size:30px;
	color:#fff;
	line-height:300px;
}
.wrap ul li.bg1 {
	background:orange;
}
.wrap ul li.bg2 {
	background:paleturquoise;
}
.wrap ul li.bg3 {
	background:blueviolet;
}
.wrap ul li.bg4 {
	background:palevioletred;
}
.wrap ul li.bg5 {
	background:yellowgreen;
}
.wrap ul li.bg6 {
	background:yellow;
}
.wrap ul li.bg7 {
	background:blue;
}
a {
	position:absolute;
	top:50%;
	margin-top:-20px;
	display:block;
	width:40px;
	height:40px;
	border-radius:50%;
	background:rgba(0,0,0,0.8);
	color:#fff;
	font-size:30px;
	text-align:center;
	line-height:40px;
	text-decoration:none;
}
a.next {
	right:-20px;
}
a.prev {
	left:-20px;
}