@media screen and (max-width: 1199px) {}

@media screen and (max-width: 991px) {
    #header {
        position: fixed;
        top: 0;
        height: auto;
    }

    #header .container {
        justify-content: center;
    }

    .opt-mobail {
        display: block;
    }

    .opt-mobail .lang-site {
        display: block
    }

    .main_menu {
        display: none;
    }

    .main_menu {
        position: absolute;
        width: 100%;
        top: 79px;
        left: 0;
        background: #fff;
        box-shadow: 0 6px 7px rgb(0 0 0 / 16%);
        padding-bottom: 20px;
        border-radius: 0;
    }

    .main_menu li {
        display: block;
        float: inherit;
        padding: 10px 20px;
    }

    .opt-mobail .lang-site a.btn-site {
        margin: 0
    }

    .main_menu .btn-site {
        display: none
    }

    .section_hero {
        min-height: 310px;
    }

    .col-books {
        flex: 1 50%;
    }

    .section_awards {
        padding: 20px 0 40px;
    }

    .section_awards .d-flex {
        overflow: auto;
    }

    .item-award {
        width: auto;
    }

    .section_about .row {
        flex-direction: column-reverse;
    }

    .cont-about {
        padding: 0;
        margin-bottom: 20px;
    }

    .about_page .row:nth-child(even) .cont-about {
        padding: 0;
    }

    .thumb--about {
        margin-bottom: 20px;
    }

    #team-slider {
        padding: 0 40px;
    }

    .section_join {
        padding: 40px 0;
        background-size: cover !important;
        background-position: 40% !important;
    }

    .form-contct {
        margin-bottom: 40px;
    }

    .form-contct .d-flex {
        flex-wrap: wrap;
    }

    .d-flex .form-group {
        width: 100%;
        margin: 0 0 10px 0;
    }

    .form-contct .btn-site {
        width: 100%;
    }

    .menu-ft ul {
        text-align: center;
    }

    .cont-bt {
        flex-direction: column;
    }

    .copyRight {
        margin-bottom: 10px;
    }

    .thumb-strong-team {
        margin-bottom: 20px;
    }

    .txt--awards h3 {
        font-size: 25px;
    }

    .col--5 {
        flex: 0 50%;
    }

    .txt-award-dt {
        padding: 0;
    }

    .thumb-award-dt {
        margin-bottom: 20px;
    }

    .thumb-join {
        padding: 0;
        margin-bottom: 50px;
    }

    .form-join .d-flex {
        flex-wrap: wrap;
    }

    .txt-not-found {
        padding: 0;
    }

    .col-books {
        flex: 1 50%;
    }

    .nav-tabs .nav-link {
        font-size: 15px;
    }

    .nav-tabs .nav-link.active,
    .nav-tabs .nav-item.show .nav-link {
        font-size: 14px;
    }

    .col-gallery .owl-nav > button {
        left: -35px;
    }

    .col-gallery .owl-nav > button.owl-next {
        right: -35px;
        left: auto;
    }

}

@media screen and (max-width: 767px) {}

@media screen and (max-width: 500px) {}