.wrap{
    overflow: hidden;
    position: relative;
    width: 100%;
    height: 100%;
    background-color: #f5f5f5;
    font-family: Roboto,"Helvetica Neue",Helvetica,"Nimbus Sans L",-apple-system,BlinkMacSystemFont,"Liberation Sans","Hiragino Sans GB","Microsoft YaHei","Microsoft JhengHei","Source Han Sans CN","Source Han Sans SC","Wenquanyi Micro Hei","WenQuanYi Zen Hei","ST Heiti",SimSun,"WenQuanYi Zen Hei Sharp",sans-serif;
}
.main{
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}
.banner_bg{
    position: relative;
    width: 100%;
    height: 50%;
    background: url("../img/aboutUsbg.jpg");
    text-align: center;
    vertical-align: middle;
    background-position-x: center;
    background-size: cover;
}
.content_warp{
    position: relative;
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    margin-top: 40px;
    margin-bottom: 40px;
    text-align: center;
}
.content{
    position: relative;
    width: 60%;
    height: 100%;
    margin-left: auto;
    margin-right: auto;
    z-index: 11;
    text-align: center;
}

.content_title{
    width: 80%;
    margin: 50px auto 0;
    text-align: center;
    padding-bottom: 30px;
    border-bottom: 1px solid #e7e7e7;
}
.content_title h3{
    margin: auto;
    font-size: 30px;
    line-height: 30px;

}
.content_content{
    width: 80%;
    margin: 0 auto 50px;
    text-align: left;
    padding-top: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid #e7e7e7;
}
.content_content p{
    margin: auto;
    font-size: 14px;
    line-height: 30px;
    letter-spacing: 1px;
}