.logo_img{
    width:70%;height: auto; margin-left: 15px;
}

@media screen and (min-width:799px){
    .pc_commom_title{
        display: flex;
        flex-flow: column;
    }
    .navbar-inverse{
        width: 800px;
    }
    .slide{
        margin: 0 auto;
        max-width: 800px; !important;
    }
    .featured-box{
        margin: 0 auto;
        max-width: 800px; !important;
    }
    .mainNav{
        width: 165%;
        height: 70px;
        line-height: 50px;
        font-size: 18px;
        margin:20px 0;
        float: none !important;
        text-align: center;
        background-color: #F0F0F0;
        display: flex;
        justify-items: center;
        align-items: center;

    }
    .mainNav li{
        min-width: 15%;
    }
    .navbar-inverse .navbar-nav > li > a, .navbar-inverse .navbar-nav > .open ul > a {
         text-align: center;
    }

    .logo_img{
        width:50%;height: auto;
        margin-left: 60%;
    }
    /*公司简介*/
    .pc_placeholder{
        height: 400px;
    }

    .contact{
        margin: 0 auto;
        max-width: 800px; !important;
    }

    .featured-box{
        text-align: center;
    }


}