/*手机banner轮播*/
.roll_img_mb_01{ overflow:hidden; position:relative;}
.roll_img_mb_01 .img_box{ height:200px; overflow:hidden; text-align:center;}
.roll_img_mb_01 .img_box img{ vertical-align:middle; min-height:200px; width:100%; }
.roll_img_mb_01 .nav_box{ overflow:hidden; height:20px; position:absolute; right:10px; bottom:0px;}
.roll_img_mb_01 .nav_box li{ width:10px; height:10px; font-size:1px; overflow:hidden; background:#ddd; border-radius:50px; float:left; margin:4px;}
.roll_img_mb_01 .nav_box .li_on{ background:#c00;}