.container{margin:0 auto;width:940px}
.roll-wrap:hover .control{display:block}.roll-wrap{position:relative;width:100%;height:100px;overflow:hidden}
.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:9999px}
.roll_row .roll__list li{ }
.control{position:absolute;top:42%;display:none;padding:10px 5px;font-weight:700;text-decoration:none;color:#fff;background-color:rgba(0,0,0,.3);z-index: 999;}
.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:700;text-align:center;color:#fff;background-color:#f90}.roll_col .li-2{background-color:#09f}.roll_col .li-3{background-color:#f09}.roll_col .li-4{background-color:#0f9}.roll_col .control{top:80px}