@charset"utf-8"

*{

    margin: 0;

    padding: 0;

    font-size: 12px;

}

body

{

    background-color: #F5F5F5;

}

.top{

    width:100%;

    height: 27px;

  background:url(/企业网站/images/top_bg.jpg)repeat-x;

    }

.top_content{

    width:1000px;

    margin:0 auto;

}

.top_content li

{

    list-style-image:url(/企业网站/images/li_bg.gif);

    float: right;

    width:70px;

    line-height: 27px;

}

.top_content a:link,.top_content a:visited

{

    color:#8E8E8E;

    text-decoration: none;

}

.top_content a:hover,.top_content a:active{

    color: #900;

    text-decoration:none;

}

.wrap

{

    width:1000px;

    margin: 0 auto;

    background-color: #FFF;

}

.logo

{

    height:80px;

        background-color: #FFF;

}

.logo_left

{

    width: 200px;

    float: left;

}

.logo_right

{

    width: 300px;

    float: right;

   height: 28px

    margin-top: 30px;

    color: #8E8E8E;

}

.logo_right img

{

    vertical-align:middle;

    margin-right: 10px;

}

.tel{

    font-family: cursive;

    font-size: 16px;

    color:crimson;

}

.nav

{

    height: 40px;

}

.nav_left

{

    width:10px;

    background:url(/企业网站/images/nav_left.jpg);

    background-repeat: no-repeat;

    float: left;

    height: 40px;   

}

.nav_mid

{

    width: 980px;

    background-image:url(/企业网站/images/nav_bg.jpg);

    background-repeat: repeat-x;

    float: left;

     overflow: hidden;

}

.nav_right

{

    width:10px;

    background:url(/企业网站/images/nav_right.jpg) no-repeat;

    float:left;

}

.nav_mid_left li

{

float: left;

    list-style-type: none;

    width:100px;

    text-align: center;

    line-height: 10px;

}

.nav_mid_left a:link,.nav_mid_left a:visited

{

    text-decoration: none;

    color:#FFF;

    font-size: 16px

    font-family: fantasy; 

}

.nav_mid_left a:hover,.nav_mid_left a:active

{

    text-decoration: none;

    color:#FF0;

    font-size: 16px

    font-family: fantasy; 

}

.search_text

{

    width:190px;

    height:25px;

       background:url(/企业网站/images/search.jpg);

    background-repeat: no-repeat;

    background-position: right center;

    background-color: #FFF;

    padding-right: 25px;/*右覆盖*/

    border:1px solid #FFF;

}

.ad

{

    height:310px;

}

为什么图片位置不对？，而且在ad上加入overflow：hidden是图片不见了。是不是哪里格式不对导致后面的格式都不对了？还有就是为什么在360上可以显示网页而在谷歌浏览器上是乱码？新手小白，希望各位大神指教！