.main_image {width:1200px; height:450px; overflow:hidden; margin:0 auto; position:relative}
.main_image ul {width:9999px; height:450px; overflow:hidden; position:absolute; top:0; left:0}
.main_image li {float:left; width:100%; height:450px;}
.main_image li span {display:block; width:100%; height:450px}
.main_image li a {display:block; width:100%; height:450px}
.main_image li .img_1 {}
.main_image li .img_2 {}
.main_image li .img_3 {}
div.flicking_con {width:990px; margin:0 auto; position:relative}
div.flicking_con .flicking_inner{position:absolute; top:410px; right:45%; z-index:999; height:21px} 
div.flicking_con a {float:left; width:21px; height:21px; margin:0; padding:0; background:url('../images/btn_main_img.png') 0 0 no-repeat; display:block; text-indent:-10000px}
div.flicking_con a.on {background-position:0 -21px}
#btn_prev,#btn_next{z-index:113;position:absolute;display:block;width:90px!important;height:130px!important;top:50%;margin-top:-37px;display:none;}
#btn_prev{left:30px;  width:90px; height:130px;}
#btn_next{right:30px;  width:90px; height:130px;}


@media (min-width:880px) and (max-width:1200px) {
.main_image {width:880px; height:330px; overflow:hidden; margin:0 auto; position:relative}
.main_image ul {width:9999px; height:330px; overflow:hidden; position:absolute; top:0; left:0}
.main_image li {float:left; width:100%; height:330px;}
.main_image li span {display:block; width:100%; height:330px}
.main_image li a {display:block; width:100%; height:330px}
.main_image li .img_1 {}
.main_image li .img_2 {}
.main_image li .img_3 {}
div.flicking_con {width:990px; margin:0 auto; position:relative}
div.flicking_con .flicking_inner{position:absolute; top:300px; right:45%; z-index:999; height:21px} 
div.flicking_con a {float:left; width:21px; height:21px; margin:0; padding:0; background:url('../images/btn_main_img.png') 0 0 no-repeat; display:block; text-indent:-10000px}
div.flicking_con a.on {background-position:0 -21px}
#btn_prev,#btn_next{z-index:113;position:absolute;display:block;width:90px!important;height:130px!important;top:50%;margin-top:-37px;display:none;}
#btn_prev{left:30px;  width:90px; height:130px;}
#btn_next{right:30px;  width:90px; height:130px;}