@media (min-width: 1450px) {

    .bg-dark {
        height: 120px;
    }

    .navbar-brand {
        width: 220px;
        height: 220px;
        top: -40px;
    }

    .container {
        width: 90%;
        max-width: 90%;
        padding: 0;
    }

    .navbar-dark .navbar-nav .nav-link {
        font-size: 1rem;
    }

    .sreach_btn {
        width: 220px;
        height: 60px;
        position: absolute;
        left: 50%;
        margin-left: -110px;
        top: 120px;
        z-index: 9999;
        display: block;
    }

    .sreach_btn img {
        max-width: 32px;
        margin: 12px auto;
        display: block;
    }

    #demo .carousel-inner img {
        height: 800px;
    }

    .num_cont {
        width: 1600px;
        margin: 0 auto;
    }

    .adv li span font {
        font-size: 5rem;
        font-weight: lighter;
    }

    .obj .pic {
        height: 360px;
    }

    .home_case ul li .pic {
        height: 180px;
    }

    .video_list .pic {
        height: 20vw;
    }
    .home_about_info {
        padding: 7rem 4rem;
    }

    .honor_list .pic {
        height: 14vw;
    }
    .job_btn div{
        padding: 0 1rem;
    }
}