/*头部*/
body,div,ul,li,h1,h2,h3,h4,h5,h6,p{
    margin:0;
    padding:0;
}
ul,li{
    list-style: none;
}
a{
    text-decoration: none;
}
body{
    width:100%;
    height:auto;
}
input,button,select,textarea{ outline:none;} /*取消表单项聚焦时产生的边框*/
textarea{resize:none;}
.banner{
    width:100%;
    height:500px;
    background:url('../images/codev_banner.png') no-repeat center top;
    background-size:cover;
    cursor: pointer;
}
.banner a{
    display:block;
    width:100%;
    height:100%;
}
.use_line{
    width:100%;
    height:35px;
    line-height:35px;
    font-size:18px;
    color:#ffffff;
    text-align:center;
    background:#442667;
}
.center_content{
    width:1000px;
    height:auto;
    overflow:hidden;
    margin:0 auto;
}
.center_content img{
    width:100%;
    height:auto;
    display:block;
    overflow: hidden;
}