#nav_top { float:left; margin:0; margin-left:12px; width:563px; }
#nav_top li { list-style:none; float:left; position:relative; z-index:99; }
#nav_top li a { cursor:hand; display:block; float:left;  height:20px;  }
#nav_top ul.title_detail { position:absolute;   z-index:9999; padding-left:0; margin-left:0;width:158px; height:40px;  overflow:hidden; padding-top:60px;top:16px; left:0;display:none;} 
#nav_top ul.title_detail li { float:left; width:50%; overflow:hidden; }
#nav_top ul.title_detail a { display:block; height:30px; text-decoration:none; line-height:30px; color:#000; border:none; width:100%; margin:0 auto;} 
#nav_top ul.title_detail a:hover { background:#CCC; color:#000; } 
#nav_top li ul li { float:none; text-align:center;  }
#tj{ background:#FFF url(/topmenu/img/tian2.gif) no-repeat; }
#fw{ background:#FFF url(/topmenu/img/fenwu.gif) no-repeat; }
#as {background:#FFF url(/topmenu/img/aoshi.gif) no-repeat;  }
#xtj {background:#FFF url(/topmenu/img/xintian.gif) no-repeat;  }
#xtj {background:#FFF url(/topmenu/img/xintian.gif) no-repeat;  }
#tj2 {background:#FFF url(/topmenu/img/tian2.gif) no-repeat; }
#td {background:#FFF url(/topmenu/img/tiandi.gif) no-repeat; }
#lt {background:#FFF url(/topmenu/img/lengteng.gif) no-repeat;}