@media (max-width: 768px) {
    .menu {
    width: 100%;
    background: #fff;
    margin-top: 0px;
    display: none;
}

.togger-menu {
    background: #a1241c;
    padding-top: 10px;
    padding-bottom: 10px;
    margin-top: 5px;
    display: inline-block;
    width: 100%;
    cursor: pointer;
}

.togger-menu span {
    float: left;
    color: #fff;
    font-size: 22px;
    margin-right: 10px;
    margin-left: 10px;
}

.nav ul li a {
    text-decoration: none;
    color: #a1241c;
    width: 100%;
    display: inline-block;
    font-weight: 500;
}

.togger-menu i {
    float: right;
    right: 0;
    position: absolute;
    color: #ffffff;
    font-size: 25px;
    cursor: pointer;
    margin-right: 15px;
}

.togger-menu-sub {
    float: right;
    color: #961f1e;
    right: 0px;
    top: 0px;
    position: absolute;
    display: block;
}

.nav ul li:hover {
    transition: all 0.25s;
    background: #fff;
    color: #a1241c;
}

.menu ul li ul li {
    padding: 0px 15px;
    width: 85%;
    border-top: none;
    border-left: none;
    line-height: 40px;
    color: #666;
}

.menu ul li ul li a {
    color: #666;
}

.menu ul li:hover ul {
    display: block;
}

.menu ul li ul {
    display: none;
    position: static;
    top: 45px;
    width: 330px;
    left: 0px;
    z-index: 99999;
    background: #ffffff;
}

.nav ul li ul {
    display: none;
    top: 45px;
    width: 250px;
    left: 0px;
    z-index: 99999;
    background: #fff;
    border: 0px;
}

.menu ul li {
    width: 100%;
    display: inline-block;
    list-style: none;
    float: left;
    padding: 0;
    font-size: 16px;
    height: auto;
    line-height: 37px;
    text-transform: none;
    border-bottom: 1px solid #e2e2e2;
}

.slogan {
    font-family: monospace;
    font-size: 14px;
    color: #a1241c;
    line-height: 20px;
    margin-top: 15px;
}

.language {
    margin-top: -28px;
    position: absolute;
    left: -13px;
}

.search {
    float: right;
    margin-top: 20px;
    position: relative;
    right: -23px;
}

.logo {
    margin-top: 10px;
    text-align: center;
}

#owl-demo .item img {
    display: block;
    width: 100%;
    height: 140px;
}

.title_primary {
    background: url(../img/vien.png) no-repeat bottom center;
    text-align: center;
    padding-bottom: 20px;
    font-size: 15px;
    text-transform: uppercase;
    font-weight: bold;
    font-family: tahoma;
    margin-top: 5px;
    color: #3b5998;
}

.dangky_khoahoc .form_dangky button {
    margin-top: 20px !important;
    display: block;
    margin: auto;
    border: none;
    text-transform: uppercase;
    font-weight: bold;
    color: #a1241c;
    font-size: 16px;
    padding: 12px 30px;
    background: #fff;
    cursor: pointer;
    border-radius: 3px;
}

    .btn_learn {
        margin-top: 45px;
        height: 40px;
        text-align: center;
    }

.box_news .btn_news {
    margin-top: 10px;
    padding-right: 35px;
    text-align: center;
    margin-bottom: 10px;
}

.box_news {
    margin-top: 20px;
}

.box_news .title_news {
    margin-top: 10px;
    text-align: center;
    color: #3b5998;
    font-size: 18px;
    padding-right: 0px;
}

.box_news .btn_news {
    margin-top: 10px;
    padding-right: 0px;
    text-align: center;
    margin-bottom: 10px;
}

.link_footer {
    margin-top: 20px;
    display: none;
}

.mxh {
    margin-top: 20px;
    float: none;
    margin-bottom: 15px;
    text-align: center;
}

.map {
    text-align: center;
}

.btn_learn a {
    width: 100%;
    text-transform: uppercase;
    font-family: tahoma;
    font-weight: bold;
    color: #3b5998;
    border: 1px solid #e4bdbd;
    background: none;
    border-radius: 5px;
    padding: 16px 40px;
    font-size: 16px;
    cursor: pointer;
    text-decoration: none;
}

.box_danhmuc img {
    width: 100%;
    height: auto;
}

.box_danhmuc {
    margin-top: 20px;
    border-bottom: 1px solid #eee;
    padding-bottom: 20px;
}

.iframe-video {
    width: 100%;
    height: auto;
}
.title_article {
    font-size: 15px;
    text-transform: uppercase;
    font-weight: bold;
    font-family: tahoma;
    color: #3b5998;
    padding-bottom: 20px;
}
.title_video {
    margin-top: 10px;
    font-weight: bold;
    font-size: 15px;
}
.date_video {
    font-size: 12px;
    margin-top: 0px;
    margin-bottom: 10px;
}
    .box_tailieu {
        margin-top: 20px;
        border-bottom: solid 1px #e2e2e2;
    }
    .nd{
        display: none;
    }
    .box_tailieu .title a {
        text-decoration: none;
        font-size: 17px;
    }
    .box_tin_moi {
        margin-top: 10px;
        border-bottom: 1px solid #e2e2e2;
        padding-bottom: 10px;
    }
    .tin_tuyendung {
        margin-top: 20px;
        border-bottom: solid 1px #e2e2e2;
    }
    .tin_tuyendung .link_more a {
        color: #a1241c;
        text-decoration: none;
        border: 1px solid #b7a19f;
        padding: 4px 12px;
    }
    .form_contact button {
        background: #b61318;
        color: #fff;
        border: none;
        padding: 7px 20px;
        margin-top: 10px;
        border-radius: 2px;
        cursor: pointer;
    }
    .list_khoahoc {
         margin-top: 20px;
         border: 1px solid #ccc;
         text-align: center;
         display: inline-block;
         padding-bottom: 10px;
         width: 100%;
         height: auto;
     }
    .list_khoahoc2 {
        margin-top: 20px;
        border: 1px solid #ccc;
        text-align: center;
        display: inline-block;
        padding-bottom: 10px;
        width: 100%;
        height: auto;
    }
    .list_khoahoc3 img {
         height: 235px;
         padding: 5px;
     }
    .list_khoahoc3 {
        margin-top: 20px;
        border: 1px solid #ccc;
        text-align: center;
        display: inline-block;
        padding-bottom: 10px;
        width: 100%;
        height: auto;
    }
    .img_news img {
        width: 90%;
    }

}