@charset "utf-8";
.banner{
    width: 100%;
    height: 350px;
    background: url(../images/about_ban.png) no-repeat center center;
    background-size: cover;
    position: relative;
    margin-top: 80px;
    margin-bottom: 120px;
}
.about_bj2{
    width: 1200px;
    height: 441px;
    background: url(../images/about_pic11.png) no-repeat center center;
    background-size: cover;
    position: relative;
    margin-bottom: 160px;
}