.roll_box{
	width: 1000px;
    height: 330px;
    overflow: hidden;
    position: relative;
    margin: 0px auto;
    position: relative;
}
.roll_list{
	float: left;
	left: 0;
    position: absolute;
}
.roll_list img{
	float: left;
    width: 188px;
    margin-right: 12px;
}
.arrow{
	display: inline-block;
	line-height: 36px;
	top: 175px;
}

@media screen and (max-width: 1020px){
.roll_box{
	width: 100%;
	overflow: auto;
}
.arrow{
	display:none;
}
}