@media only screen and (max-width: 1200px) {
    .banner .item {
        min-height: 350px;
    }

    .banner .item_detail {
        min-height: 220px;
    }
}

@media only screen and (max-width: 1024px) {
    .navigation-dtu .nav-dtu li a {
        font-size: 14px;
    }

    .banner .item_detail {
        min-height: 200px;
    }

    .banner .item .nivo-caption .slide-h2 {
        font-size: 30px;
    }

    .box-student .info_student .box_info {
        padding: 50px 0 10px 50px;
    }

    .box-program .item_program .box-title .item_info .title_item a {
        font-size: 18px
    }

    .box-research .list_research .item_research .rs_title a {
        font-size: 18px
    }
}

@media only screen and (max-width: 992px) {
    .hide_desktop {
        display: inline-block;
    }

    .fa-home {
        display: none;
    }

    .navigation {
        position: fixed;
        width: 80%;
        height: 100%;
        right: -400px;
        top: 0;
        overflow: visible;
        background-color: #fff;
        border-right: 1px solid #757474;
        z-index: 9999;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        transition-duration: .8s;
        transition-timing-function: ease;
    }

    .navigation-dtu .nav-dtu {
        width: 100%;
        margin-left: 0;
        margin-top: 50px;
    }

        .navigation-dtu .nav-dtu li {
            text-align: left;
            width: 100% !important;
            border-bottom: 1px solid #cbcbcb;
        }

            .navigation-dtu .nav-dtu li a {
                padding: 10px 20px;
                color: #000;
                font-size: 12px;
            }

            .navigation-dtu .nav-dtu li:first-child a {
                padding-left: 20px;
               
            }

            .navigation-dtu .nav-dtu li a:hover, .navigation-dtu .nav-dtu li a:focus, .navigation-dtu .nav-dtu li.active a {
                color: #a9161c;
            }

            .navigation-dtu .nav-dtu li .nav-dtu-child {
                display: block;
                
            }

    .icon_menu_repo, .icon_menu_inpo {
        display: inline-block;
    }

        .icon_menu_repo i, .icon_menu_inpo i {
            z-index: 9999;
        }

    i.show_menu_icon {
        display: block;
    }

    i.show_hide_icon {
        display: none;
    }

    i.fa-times {
        color: #c61330;
    }

    .banner .item {
        min-height: 320px;
    }

    .box-enroll .item_enroll .box-title .item_info .news_title a {
        font-size: 16px;
    }

    .box-student .info_student .box_info .desc p.note {
        font-size: 15px;
    }

    .box-student .info_student .box_info .desc p.author {
        font-size: 16px;
    }
    .box-program .item_program .box-title .item_info .title_item a{font-size:16px;}
    .box-research .list_research .item_research .rs_title a {
        font-size: 16px
    }
    /*.content_detail .news_list .box_item {
        display: block;
    }

        .content_detail .news_list .box_item .img_news {
            flex: 0 0 100%;
            max-width: 100%;
            margin: 0;
        }

        .content_detail .news_list .box_item .item_news {
            flex: 0 0 100%;
            max-width: 100%;
            padding-left: 0;
            padding-top: 10px;
        }*/

}

@media only screen and (max-width: 823px) {
    .banner .item_detail {
        min-height: 200px;
    }

    .banner .item .nivo-caption .slide-dtu {
        font-size: 18px;
    }

    .banner .item .nivo-caption .slide-h2 {
        font-size: 26px;
    }

    .banner .item .nivo-caption p.slide-hotline {
        font-size: 18px;
    }
    .box-program .item_program .box-title{padding:15px;}
        .box-program .item_program .box-title .item_info {
            padding-left: 15px;
        }
        .box-program .item_program .box-title .item_icon {
            max-width: 60px;
        }
   
    .box-news .box_item_news .item_news .box-title {
        padding: 10px;
    }
        .box-news .box_item_news .item_news .box-title .title_item a {
            line-height: 1.2;
        }
        .box-news .box_item_news .item_news .date_news {
            top: 10px;
            left: 10px;
            padding: 5px;
        }
    .box-research .list_research .item_research .info_more .date_time {
        font-size: 13px;
    }
        .box-research .list_research .item_research .info_more .date_time:after {
            padding-left: 15px;
        }
    .box-research .list_research .item_research .info_more .author {
        font-size: 13px;
        margin-left: 15px;
    }
    .footer .footer_box .title_img .title_footer {
        font-size: 18px;
    }
}

@media only screen and (max-width: 767px) {
    .banner .item {
        min-height: 300px;
    }

        .banner .item .nivo-caption p.slide-p {
            padding-top: 0;
            margin: 0;
        }

        .banner .item .nivo-caption a.slide-read-more {
            margin-top: 10px;
        }
    .box-news {
        background: #ebebeb;
    }
        .box-news .cat_mb {
            flex-direction: column-reverse;
        }
        .box-news .category_news .tab_cat {
            margin: 10px 0;
        }
            .box-news .category_news .tab_cat .buffer_tab {
                display: inline-block;
                margin-right: 20px;
                padding: 5px 0;
            }
        .box-news .box_item_news .box_achievement {
            padding: 20px 0;
        }

        .footer .footer-social ul li {
            display: inline-block;
            padding: 0 5px;
        }
    .box-news .category_news .view_all {
        text-align: end;
        margin-top: 10px;
    }

    .content_detail .contact_info ul.social_right li {
        margin-right: 0;
    }

    .content_detail {
        margin-top: 30px;
    }

    .box-project {
        margin-top: 30px;
    }

    .box_about_detail {
        margin-top: 30px;
    }

    .staff_detail {
        margin-top: 30px;
    }

    .margin_top_50 {
        margin-top: 30px;
    }
}

@media only screen and (max-width: 667px) {
    .banner .item_detail {
        min-height: 180px;
    }


    .header-top .box-menu-fix {
        flex-wrap: wrap;
    }

        .header-top .box-menu-fix .search-form {
            margin-top: 5px;
        }

    .content_detail .contact_info ul.social_right li a {
        width: 36px;
        height: 36px;
    }

        .content_detail .contact_info ul.social_right li a i {
            font-size: 22px;
        }
}

@media only screen and (max-width: 576px) {
    .content_form .form-group {
        display: block;
        margin-bottom: 0;
    }

    .content_form input[type="text"], input[type="password"], input[type="number"], select {
        width: 100%;
        margin-bottom: 1rem;
    }

    .content_form textarea {
        margin-bottom: 1rem;
    }
}

@media only screen and (max-width: 568px) {
    .banner .item .banner_left {
        background: rgb(255 255 255 / 80%);
    }

    .logo {
        -ms-flex: 0 0 75%;
        flex: 0 0 75%;
        max-width: 75%;
    }

    .language {
        display: flex;
        justify-content: flex-end;
    }

        .language ul.lang li {
            padding-right: 0;
            padding-left: 5px;
        }

    .box-research .item_research .thumb_img img {
        max-width: 100%;
    }

    .box-team .col-sm-6 {
        -ms-flex: 0 0 50%;
        flex: 0 0 50%;
        max-width: 50%;
    }

    .footer .footer_box .col-sm-5 {
        ms-flex: 0 0 41.666667%;
        flex: 0 0 41.666667%;
        max-width: 41.666667%;
    }

    .footer .footer_box .col-sm-7 {
        ms-flex: 0 0 58.333333%;
        flex: 0 0 58.333333%;
        max-width: 58.333333%;
    }

    .box_detail .box_item .col-50, .box-project .box_item .col-50 {
        -ms-flex: 0 0 50%;
        flex: 0 0 50%;
        max-width: 50%;
    }

    .staff_detail .box_img {
        display: flex;
        flex-wrap: wrap;
    }

    .staff_detail .img_staff {
        margin-right: 15px;
    }

    .staff_detail .box {
        margin-top: 0;
    }

    .content_detail .news_list .box_item {
        display: flex;
    }

        .content_detail .news_list .box_item .img_news {
            flex: 0 0 33.333333%;
            max-width: 33.333333%;
            margin: 0;
        }

        .content_detail .news_list .box_item .item_news {
            flex: 0 0 66.666667%;
            max-width: 66.666667%;
            padding-left: 15px;
            padding-top: 0;
        }

    .content_detail .contact_info ul.social_right li a {
        width: 44px;
        height: 44px;
    }

        .content_detail .contact_info ul.social_right li a i {
            font-size: 25px;
        }

    .box-project .item_project .title_team p {
        font-size: 16px;
    }
}

@media only screen and (max-width: 480px) {
    .banner .item {
        min-height: 280px;
    }
}

@media only screen and (max-width: 320px) {
    .box_detail .box_item .col-50 {
        -ms-flex: 0 0 100%;
        flex: 0 0 100%;
        max-width: 100%;
    }
}

@media only screen and (max-width: 280px) {
    .content_detail .news_list .box_item {
        display: block;
    }

        .content_detail .news_list .box_item .img_news {
            flex: 0 0 100%;
            max-width: 100%;
            margin: 0;
        }

        .content_detail .news_list .box_item .item_news {
            flex: 0 0 100%;
            max-width: 100%;
            padding-left: 0;
            padding-top: 10px;
        }
}
/* Mobile */
@media (max-width: 768px) {
    .partner_item {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }

    .partner_logo {
        flex: none;
    }

        .partner_logo img {
            max-width: 220px;
        }

    .partner_info {
        width: 100%;
    }

    .partner_btns {
        justify-content: center;
    }
}

/* ✅ Tablet */
@media (max-width: 992px) {
    .news_thumb {
        flex: 0 0 160px;
    }

    .title_news a {
        font-size: 18px;
    }
    .box_item_news .news_item {
        align-items: unset;
    }
}

/* ✅ Mobile */
@media (max-width: 768px) {
    .news_item {
        flex-direction: column;
    }

    .news_thumb {
        width: 100%;
        flex: none;
    }

        .news_thumb img {
            height: 180px;
        }

    .title_news a {
        font-size: 17px;
    }
    .box_item_news .news_item {
        align-items: unset;
    }
}

/* ✅ Small mobile */
@media (max-width: 480px) {
    .news_thumb img {
        height: 150px;
    }

    .title_news a {
        font-size: 16px;
    }
    .box_item_news .news_item {
        align-items: unset;
    }
}
@media (max-width: 1200px) and (min-width: 992px) {
    .navigation-dtu .nav-dtu > li > a {
        font-size: 12px; /* giảm nhẹ chữ */
        padding: 8px 10px;
        white-space: nowrap;
       
    }
    .navigation-dtu .nav-dtu li a {
        font-size: 12px;
    }
}

/* Mobile: đổi thứ tự hiển thị */
@media (max-width: 767px) {

    .box-news .row.cat_mb {
        display: flex;
        flex-direction: column;
    }

    /* Cho category lên trên */
    .box-news .category_news {
        order: 1;
        margin-bottom: 20px;
    }

    /* News xuống dưới */
    .box-news .box_item_news {
        order: 2;
    }
}

@media (max-width: 767px) {
    .title_name {
        margin-top: 30px;
    }
    .header-top .row {
        display: flex;
        align-items: center;
        justify-content: space-between;
    }

    /* Ngôn ngữ bên trái */
    .header-top .language {
        width: auto;
        flex: 0 0 auto;
    }

    /* Menu + search bên phải */
    .header-top .box-menu-fix {
        width: auto;
        flex: 1;
        display: flex;
        justify-content: flex-end;
        align-items: center;
    }

    /* Menu inline */
    .dtuhome-menu {
        display: flex;
        flex-wrap: wrap;
        justify-content: flex-end;
    }

        .dtuhome-menu li {
            display: inline-block;
        }

    /* Search icon gọn lại */
    .search .btn-primary {
        padding: 6px 10px;
        font-size: 12px;
    }
}