.roll_img_mb_01 {
	overflow: hidden; position: relative;
}
.roll_img_mb_01 .img_box {
	height: 200px; text-align: center; overflow: hidden;
}
.roll_img_mb_01 .img_box img {
	width: 100%; vertical-align: middle; min-height: 200px;
}
.roll_img_mb_01 .nav_box {
	height: 20px; right: 10px; bottom: 0px; overflow: hidden; position: absolute;
}
.roll_img_mb_01 .nav_box li {
	background: rgb(221, 221, 221); margin: 1px; border-radius: 50px; width: 10px; height: 10px; overflow: hidden; font-size: 1px; float: left;
}
.roll_img_mb_01 .nav_box .li_on {
	background: rgb(204, 0, 0);
}