CSS没问题，你看一下你的html结构是不是哪里写错了

.copyright{

width:100%;

background-color:#999;

clear:both;

}

.copyright-content{

width:1000px;

height:170px;

margin:10px auto;

padding-top:15px;

}

.copyright-content li{

width:180px;

list-style-type:none;

float:left;

text-align:center;

line-height:30px;

background-image:url(images/line.png);

background-repeat:no-repeat;

background-position:right center;

padding-left:0px;

}

.copyright-content a{

text-decoration:none;

font-family:"微软雅黑";

font-size:18px;

color:#666;

}

.copyright-content li ul li{

font-family:"新宋体";

font-size:13px;

color:#666;

background:none;}

代码贴出来