#nav {padding:0; margin:0; list-style:none; height:47px; position:relative; z-index:500; font-family:"微软雅黑";font-weight:bold;cursor:pointer}
#nav li.top {display:block; float:left; width:122px; height:47px; line-height:41px; text-align:center;font-family:"微软雅黑"; background:url(../images/gjzx2_07.jpg) no-repeat right ; font-weight:bold;cursor:pointer}
#nav li a.top_link {display:block;  height:47px; line-height:47px; color: #fff; font-size:15px; text-decoration:none; font-weight:bold; font-family:"微软雅黑";cursor:pointer}
#nav li a.top_link span.down {display:block;  height:47px; line-height:47px; color: #fff; font-size:15px; text-decoration:none;font-weight:bold;cursor:pointer}
#nav li a.top_link:hover {color:#fff;display:block; width:122px; height:47px; line-height:47px;font-weight:bold;cursor:pointer}
#nav li a.top_link:hover span {color:#b1d5eb;display:block; width:122px; height:47px; line-height:47px;font-weight:bold;}
#nav li a.top_link:hover span.down {color:#b1d5eb; display:block; width:122px; height:47px; line-height:47px;font-weight:bold;}
#nav li:hover > a.top_link {color: #b1d5eb;font-weight:bold;}
/* Default list styling */

#nav li:hover {position:relative; z-index:200;}

/* keep the 'next' level invisible by placing it off screen. */
#nav ul, 
#nav li:hover ul ul,
#nav li:hover ul li:hover ul ul,
#nav li:hover ul li:hover ul li:hover ul ul,
#nav li:hover ul li:hover ul li:hover ul li:hover ul ul
{position:absolute; left:-9999px; top:-9999px; width:0; height:0; margin:0; padding:0; list-style:none;}

#nav li:hover ul.sub
{left:0; top:47px; background: #efefef;white-space:nowrap; width:122px; height:auto; z-index:300; text-align: center;display: inline;font-family:"微软雅黑";}
#nav li:hover ul.sub li
{display:block; height:28px; position:relative; float:left; width:122px; font-weight:normal;font-family:"微软雅黑";border-bottom:1px solid #d5d5d5; }
#nav li:hover ul.sub li a
{display:block; font-size:12px; height:28px; width:122px; line-height:28px; text-indent:5px; color:#000; text-decoration:none;font-family:"微软雅黑";}
#nav li:hover ul.sub li a:hover 
{background:#1c2a69; color:#fff;}