ul,li{ margin:0px;padding:0px;}
 #navcont {background: #fff; width: 100%;}
 #nav { font-family: helvetica; position:relative; width:1207px; height:56px; font-size:14px; color:#000; 
margin: 0 auto; }
 #nav ul { list-style-type:none; }
 #nav ul li { float:left; position: relative; width:120px; text-align:center}
 #nav ul li a { border-right:1px solid #e9e9e9; padding:20px; display:block; text-decoration:none; text-
align:center; color:#000;}
 #nav ul li a:hover {background: #FF6600 url(http://www.youwokeji.com.cn/Images/shadow.png) repeat-x;; 
color:#fff;} 
 #nav ul li ul {display: none;}
 #nav ul li:hover ul {display: block; position: absolute; top:56px; min-width:200px; left:0;} 
 #nav ul li:hover ul li a {display:block; background:#FFECD9; color:#000000; width: 200px; text-align: 
center; border-bottom: 1px solid #f2f2f2; border-right: none;}
 #nav ul li:hover ul li a:hover { background:#FF6600; color:#ffffff; }
 .borderleft {border-left: 1px solid #e9e9e9;margin:0;}
 .top { border-top: 1px solid #f2f2f2;}
 
 .box{
position: relative;
height: 80px;
width: 100%;
z-index: 999;
}

.box-active{
position: sticky;
  position: -webkit-sticky;
  top: 10px; 
}
.ptopic{
font-size: 30px;

}
.pcontent{
font-size: 20px;
line-height:30px;
}