.topsection {

	width:960px; height:145px;overflow:hidden;

	margin: 0px auto; clear:both;BACKGROUND: url(../images/headlogo.png) no-repeat;

}



.topnav {

	width:960px; height:55px;

	margin: 0px  auto; clear:both;BACKGROUND: url(../images/navbg.png) no-repeat;
    margin-top:90px;
	z-index:999;
	

}



#nav {

line-height: 30px;

height: 43px;

list-style-type: none;

position: relative;

padding: 0px;

margin-top: 12px;

width: 800px;

text-align: center;

float:right;

}

#nav A {

font-family: "宋体";

font-size: 14px;

font-weight: bold;

color: #ffffff;

display: block;

width:75px;

height:30px;

text-align: center;

text-decoration: none;



}



#nav li.home A {

font-family: "宋体";

font-size: 14px;

font-weight: bold;

color: #ffffff;

display: block;

width:100px;

height:30px;

text-align: center;

text-decoration: none;



}

#nav A:link {

color: #ffffff;

text-decoration: none;

}

#nav A:visited {

color: #ffffff;

text-decoration: none;

}

#nav A:hover {

color: #fff;



width:78px;

display:block;

height:24px;

}

#nav LI {

width: 75px;

float: left;

position: relative;

margin-left:1px;

padding-top:6px;





}



#nav LI.home {

width: 100px;

float: left;

position: relative;

margin-left:1px;

padding-top:6px;



text-align:right;



}

#nav LI:hover {

width: 75px;

float: left;

position: relative;

margin-left:1px;

height:45px;

BACKGROUND: url(../images/active_main.png) no-repeat;

}



#nav  LI.home:hover {

width: 100px;

float: left;

position: relative;

margin-left:1px;

height:45px;

BACKGROUND: url(../images/active_index.png) no-repeat;

text-align:center;

overflow:hidden;

}



/*  二级菜单  */

#nav ul.sev {

visibility: hidden;

position: absolute;

height: 36px;

top: 39px;

right: -470px;

width: 702px;

z-index: 25;

BACKGROUND: url(../images/sub.png) no-repeat;

padding:0;

list-style:none;





}



#nav ul.tech {

visibility: hidden;

position: absolute;

height: 36px;

top: 39px;

right: -70px;

width: 232px;

z-index: 26;

BACKGROUND: url(../images/sub.png) no-repeat;

padding:0;

list-style:none;





}

#nav :hover {

white-space: normal;

text-decoration: none;

}

#nav li:hover ul, #nav a:hover ul {

visibility: visible;

height: 36px;

margin-top: 4px;

text-align: center;

}

#nav :hover ul li {

font-weight: normal;

height: 30px;

width: 76px;

display: block;

position: relative;

border-collapse: collapse;

background-image: none;

}



#nav :hover ul li:hover {

font-weight: normal;

height: 30px;

width: 76px;

display: block;

position: relative;

border-collapse: collapse;

BACKGROUND: url(../images/active_sub.png) no-repeat;

}



#nav :hover ul li a {

font-size: 13px;

height: 24px;

line-height: 2.0em;

float: left;

padding: 0 1px;

color: #ffffff;

background: none;



}

#nav :hover ul li a:hover {

color: #fff;



line-height: 2.0em;

}



ul#nav li {

cursor:pointer;



}