.container{
    margin: 0 auto;
    width: 940px;
}
.roll-wrap:hover .control{
    display: block;
}

.roll-wrap{
    position: relative;
    width: 100%;
    height: 420px;
	padding:15px 0;
}
.roll-wrap .roll__list{

}
.roll_row .roll__list::before, .roll_row .roll__list::after {
    content: "";
    display: table;
    line-height: 0;
}
.roll_row .roll__list::after {
    clear: both;
}
.roll_row .roll__list{
    width: 9999999999px;
}
.roll_row .roll__list li{
    float: left;
    display: block;
    margin-right: 20px;
    width:300px;
    height: auto;
    font-weight: bold;
    text-align: center;
    color: #fff;
    background-color: #ff9900;
}
.roll_row .roll__list li a{
	display: block;
	width: 100%;
	height: auto;
	position:relative;
}
.roll_row .roll__list li a img{
	display: block;
	width: 100%;
	height: auto;
	border-radius: 5px;
}
.roll_row .roll__list li a span{
	display: block;
	position:absolute;
	left:0;
	top:0;
	right:0;
	bottom:0;
	background:rgba(0,0,0,0.5);
	border-radius: 5px;
	opacity: 0;
	-webkit-transition:all 0.6s ease;
	-moz-transition:all 0.6s ease;
	-o-transition:all 0.6s ease;
	transition:all 0.6s ease;
}
.roll_row .roll__list li a:hover span{
	opacity: 1;
}
.roll_row .roll__list li a span i{
	display: block;
	font-size: 12px;
	color: #fff;
	border: 1px solid #fff;
	border-radius: 3px;
	width: 50%;
	height: 40px;
	line-height:40px;
	text-align: center;
	margin:0 auto;
	margin-top:55%;
	font-style: normal;
}


.control{
    position: absolute;
    top: 30px;
    display: none;
    padding: 10px 5px;
    font-weight: bold;
    text-decoration: none;
    color: #fff;
    background-color: rgba(0, 0, 0, .3);
}
.control:hover{
    background-color: rgba(0, 0, 0, .5);
}
.control.pre{
    left: 5px;
}
.control.next{
    right: 5px;
}
.roll_col{
    width: 100%;
    height: 200px;
    overflow: hidden;
}
.roll_col .roll__list{
    width: 100%;
}
.h600{
    height: 600px;
}
.roll_col li{
    display: block;
    height: 200px;
    line-height: 200px;
    font-size: 30px;
    font-weight: bold;
    text-align: center;
    color: #fff;
    background-color: #ff9900;
}
.roll_col .li-2{
    background-color: #0099ff;
}
.roll_col .li-3{
    background-color: #ff0099;
}
.roll_col .li-4{
    background-color: #00ff99;
}
.roll_col .control{
    top: 80px;
}