.container{
    margin: 0 auto;
    width: 1000px;
}
.roll-wrap:hover .control{
    display: block;
}

.roll-wrap{
    position: relative;
    width: 100%;
    height: 167px;
    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{
    float: left;
    display: block;
    width: 200px;
    height: 167px;
    margin-right: 10px;
}