.topbanner {
    display: none;
}

.topbannermb {
    display: block;
}

.text-menu {
    font-size: 0.7em;
    line-height: 0;
}

.gach {
    font-size: 1em;

}

.box11 {
    flex-direction: column;
    padding: 20px 10px;

}

.textgt2 {
    padding: 10px;

}

.gioithieu {
    padding: 20px 5px 10px 5px;
}

.video-box11 {
    padding: 10px 0px;
    text-align: center;

}

.box013 {
    height: auto;
    /* background-image: linear-gradient(to right, #c10b0b, #ab781b); 
    background-image: url(media/nen11MB.jpg);
    background-size: cover; 
    padding-bottom: 70px;*/
    margin-bottom: -50px;
}

.textgt0 {
    display: none;
}

.khoi21 {
    flex-direction: column;
    background-image: url(media/nen22MB2.jpg);
    background-size: cover;
    background-repeat: no-repeat;

}

.khoi211 {
    width: 100%;
    padding-bottom: 200px;
}

.khoi212 {
    width: 100%;
}

.box31 {
    padding: 5px;
}

.textbox311 {
    font-size: 2em;
}

.textbox312 {
    font-size: 1em;
}

.khoi5 {
    background-image: url(media/nen3MB.jpg);
}

.textbox511 {
    font-size: 1.2em;
}

.tacgia1 {
    font-size: 1em;
}