css兼容firefox和ie8置中问题 - Web 开发 / HTML(CSS)

我的页面中现在在ie8和firefox下全部页面是右靠的
希望哪位牛人帮忙解决下
css代码如下
CSS code:
/*------------全局-----------*/
@charset "gb2312";
body{ text-align:center; margin-left:auto; margin-right:auto; margin-top:0px; margin-bottom:0px; color:#000; font-

size:12px; font-family:"宋体";}
a{color:#000;text-decoration:none}
a:hover{color:#F00; text-decoration:none}
img{border:0px}
ul{ list-style:none;margin:0;padding:0;}
li{list-style-type:none;margin:0;padding:0;}
h1,h3{ margin:0px; padding:0px; display:inline; font-size:12px; }
h1{float:left; font-size:12px; font-weight:100; color:#003399; display:inline;}
h3{color:#FF0000;}
h2{ margin:0px; padding:0px; font-size:12px; font-weight:100; display:inline;}

/*------------头部-----------*/
#center{ width:982px;}
#HF_Head{}

.HF_Top{ height:25px; border:1px #BEC9CB solid; border-top:none;background:#F2FAFD; line-height:25px;}
.HF_Top .Left{
width:600px;
height:25px;
float:left;
padding-left: 15px;
text-align:left;
}
.HF_Top .Right{ width:265px; height:25px; float:right}
.HF_Top .Right a{ margin:0px 7px;}

.HF_Menu{height:60px; margin:5px 0px;}
.HF_Menu .Logo{ width:160px; height:60px; float:left;}
.HF_Menu .Help{ width:55px; height:60px; float:left; margin:0px 13px;}
.HF_Menu .Banner{ width:468px; height:60px; float:left;}
.HF_Menu