*{margin:0; padding:0;border:0;}
h1{height:0;line-height:0;font-size:0;}
#cont_bg{min-width:1002px;width:100%;width:expression((documentElement.clientWidth < 1002) ? "1002px" : "100%" );}
#cont_bg{background:#000 url(../images/bg_01.jpg) no-repeat center 0;}
#cont_a{background:url(../images/bg_02.jpg) no-repeat center 283px;}
#cont_b{background:url(../images/bg_03.jpg) no-repeat center 558px;}
#cont_c{background:url(../images/bg_04.jpg) no-repeat center 908px;}
#header{margin:0 auto;width:1002px;position:relative;}
#main_top img,#header img{display:block;}
#main_mid{width:1002px;margin:0 auto;position:relative;}
#main_top{background:#00F;}
.btm_h{position:absolute;top:0;left:0;}
.btm_h span a{float:left;width:501px;height:61px;overflow:hidden;background:url(../images/a_bg.gif) repeat;text-indent:-9999px;}
.btm_h .btm1 .hover{background:url(../images/hd2.jpg) no-repeat 0 0;width:501px;height:61px;display:block;}
.btm_h .btm2 .hover{background:url(../images/hd2.jpg) no-repeat -501px 0;width:501px;height:61px;display:block;}
/* nav_box */
.nav_box{position:absolute;height:30px; line-height:30px;left:30px; text-align:right;}
.nav_box,.nav_box a{color:#33141d;}
.nav_box a:hover{color:#FF0;}
.nav_box span{padding:0 8px;}