*{border:0px;margin:0px;padding:0px;font-size:12px; font-family:Arial, Helvetica, sans-serif,"宋体";color:#00000;}
a{text-decoration:none;}
img{vertical-align:middle;}
input{vertical-align:middle;}
select{vertical-align:middle;}
.dis{display:;}
.undis{display:none;}
.undisAnswer{display:none;}
.clear{clear:both;height:1px;overflow:hidden;}




.main_wrap, .main_nav{width:980px;margin:0px auto; position:relative;}
.qa_classmenu{width:220px;height:auto;border:1px solid #e1e3e2;float:left;}
.qa_classmenu .title{height:30px;font-weight:bold;font-size:14px;color:#fff;padding:0px 8px;}
.qa_classmenu li a{color:#535250;display:block;font-size:14px;/*font-weight:bold;*/background:#dddddd url(images/arrow02.gif) no-repeat center right;padding:3px 0px 3px 15px;border:1px solid #cfcfcf;margin:1px; }
.qa_classmenu li a.flod{display:block;font-size:14px;font-weight:bold;background:#dddddd url(images/arrow01.gif) no-repeat center right;border:1px solid #cfcfcf;}
.sub_menu li a{font-weight:normal;font-size:13px;display:block;border:0px;background:#fff;}
.sub_menu li a:hover{background:#ddf0ff;}
.sub_menu li.cur a{border:0px;background:#ddf0ff;}