本帖最后由 风音洛洛 于 2013-1-22 16:00 编辑
pockry 发表于 2013-1-22 14:09 
你说的难道是这个？
margin:0 auto;
margin-top:20px;
[mw_shl_code=css,true]body {
margin:0 auto;
padding:0px;
font-size:12px;
border:0px;
}
.top a {
text-decoration:none;
color:#c8e1ff;
}
.top a:hover {
text-decoration:underline;
}
.top {
height:45px;
background:#426ca9;
}
.top_nr {
width:1000px;
height:45px;
margin:0 auto;
color:#c8e1ff;
line-height:45px;
}
.top span {
float:left;
}
.top ul {
width:200px;
height:45px;
margin:auto;
margin-left:330px;
float:left;
}
.top ul li {
height:45px;
list-style-type:none;
float:left;
padding-left:3px;
padding-right:3px;
}
.qq {
width:107px;
height:26px;
float:left;
margin-top:10px;
}
.head {
height:367px;
background:url(images/banner_jb.gif);
}
.banner {
height:367px;
background:url(images/banner.png) no-repeat;
background-position:center;
}
.banner a {
width:151px;
height:44px;
margin-left:1070px;
margin-top:300px;
float:left;
}
.nav a{
color:#FFFFFF;
text-decoration:none;
}
.nav a:hover {
text-decoration:underline;
}
.nav {
height:51px;
background:url(images/nav_jb.gif);
}
.nav_z {
width:1002px;
height:51px;
background:url(images/nav.png) no-repeat;
margin:0 auto;
line-height:51px;
}
.nav ul {
float:left;
margin:0 auto;
padding:0px;
padding-left:50px;
}
.nav ul li {
font-size:14px;
color:#FFFFFF;
font-weight:bold;
float:left;
padding-left:4px;
padding-right:4px;
list-style-type:none;
}
.con {
height:3000px;
background:url(images/bg.gif);
background-position:center;
margin:0 auto;
}
.con_dy {
width:980px;
height:100px;
margin-top:20px;
background:url(images/dy_zuo.gif) no-repeat;
}
[/mw_shl_code]