求大神帮忙 导航栏为什么不平齐

<style type="text/css">
body {
background-color: #000000;
margin: 0px;
padding: 0px;
}
#banner{
width:780px;
background-color: #ffffff;
margin: 0px auto;
padding: 0px;
}
#banner li{
float:left;
padding:0;
margin:0;
}
#nav li a{
text-decoration:none;
padding-top:8px;
display:block;
width:95px;
height:22px;
text-align:center;
background-color:#9C0;
color: #000;
margin-left:2px;
font-family: "宋体";
font-size: 14px;
}
#nav li a:hover{
background-color:#F30;
color:#FFF;
}
#banner ul{
padding-top:2px;
margin:0px;
}