.header_ch{ width:950px; height:72px; overflow:hidden; font-size:0px;}
.logo_ch{ width:156px; height:72px; float:left; overflow:hidden;}
.nav_ch{width:794px;height:72px;background:url(../images120410/pic_13.jpg) no-repeat; float:left;}
.nav_ch ol li{float:right;}
.nav_ch ol li.one_a{width:794px;font-size:14px;color:#9ad2e8;height:28px;padding-top:13px;*height:27px;*padding-top:14px;margin-right:0px; overflow:hidden;}
.nav_ch ol li.one_b{width:794px;font-size:12px;padding-top:9px;*padding-top:10px;color:#6697b0;}
.nav_ch ol li.one_a a{color:#fff;margin-left:8px;margin-right:7px;}
.nav_ch ol li.one_b a{color:#ccdbe6;margin-left:8px;margin-right:7px;}