#nav { list-style:none; height:28px; margin-top:4px; margin-bottom:0px; padding:0px; margin-left:0px;}
#nav li.top { float:left; height:28px; text-align:center; line-height:28px; width:85px; margin-left:5px; margin-right:5px;}
#nav li a.top_link { float:left; height:28px; line-height:28px; color:#333; text-decoration:none; font-size:12px; cursor:pointer;}
#nav li a.top_link span {float:left; display:block;  height:28px; }
#nav li a.top_link span.down {float:left; display:block; height:28px; background: url(daohang2.jpg) no-repeat; width:85px;}

#nav li:hover a.top_link {color:#fff;}
#nav li:hover a.top_link span { background:url(daohang2.jpg) no-repeat; width:85px; height:28px;}
#nav li:hover a.top_link span.down { background:url(daohang1.jpg) no-repeat; width:85px; height::28px;}

/* Default list styling */

#nav li:hover {position:relative; z-index:200; font-size:12px;}

#nav li:hover ul.sub
{left:0px; top:28px; background: #adf4d6; padding:2px; border:1px solid #2e855a; white-space:nowrap; width:79px; height:auto; z-index:300;}
#nav li:hover ul.sub li
{display:block; height:20px; position:relative; float:left; width:79px; font-weight:normal;}
#nav li:hover ul.sub li a
{display:block; font-size:12px; height:18px; width:74px; line-height:18px; text-indent:5px; color:#000; text-decoration:none;border:1px solid #adf4d6;}
#nav li ul.sub li a.fly
{background:#adf4d6 url(arrow.gif) 60px 6px no-repeat;}
#nav li:hover ul.sub li a:hover 
{background:#2e855a; color:#fff; border-color:#fff;}
#nav li:hover ul.sub li a.fly:hover
{background:#adf4d6 url(arrow_over.gif) 60px 6px no-repeat; color:#fff;}


#nav li:hover li:hover ul,
#nav li:hover li:hover li:hover ul,
#nav li:hover li:hover li:hover li:hover ul,
#nav li:hover li:hover li:hover li:hover li:hover ul
{left:90px; top:-4px; background: #adf4d6; padding:2px; border:1px solid #5c731e; white-space:nowrap; width:81px; z-index:400; height:auto;}

#nav ul, 
#nav li:hover ul ul,
#nav li:hover li:hover ul ul,
#nav li:hover li:hover li:hover ul ul,
#nav li:hover li:hover li:hover li:hover ul ul
{position:absolute; left:-9999px; top:-9999px; width:0; height:0; margin:0; padding:0; list-style:none;}

#nav li:hover li:hover a.fly,
#nav li:hover li:hover li:hover a.fly,
#nav li:hover li:hover li:hover li:hover a.fly,
#nav li:hover li:hover li:hover li:hover li:hover a.fly
{background:#2e855a url(arrow_over.gif) 60px 6px no-repeat; color:#fff; border-color:#fff;} 

#nav li:hover li:hover li a.fly,
#nav li:hover li:hover li:hover li a.fly,
#nav li:hover li:hover li:hover li:hover li a.fly
{background:#adf4d6 url(arrow.gif) 60px 6px no-repeat; color:#000; border-color:#adf4d6;}