@media (max-width: 72em){
    /* Desktop */
    #banner span{
        display: none;
    }
}
@media (max-width: 63.9375em) and (min-width: 46.25em){
    /* Tablet */
    #content {
        margin-left: 5%;
        margin-right:5%;
    }
    #video > video {
        width: 70%;
    }

    /* Bảng */
    table .colone{
        width: 15%;
    }
    table .coltwo{
        width: 50%;
    }
    table .colthr > img{
        width:40%;
    }
    .yt_video {
        margin: 0 5% 0 5%;
        width: 90%;
    }
}
@media (max-width: 46.2em){
    /* Phone */
    html,body {
        overflow-x: hidden;
    }
    .start {
        display:none;
    }
    .hideonmobile {
        display: none;
    }
    #header {
        width: 100%;
        height: 60px;
    }
    #header p{
        display: none;
        text-align: center;
    }
    #banner {
        height: 300px;
        
    }
    #banner >p{
        display: flex;
        margin-top: 100px;
        font-size:35px;
    }

    #content {
        margin-left: 20px;
        margin-right: 20px;
    }
    #content h2{
        font-size: 30px;
    }
    #content .more {
        width: 180px;
    }
    #first{
        font-size: 18px;
    }
    .info {
        display: block;
    }
    .text {
        width: 100%;
        margin-left:0;
        font-size: 18px;
        line-height: 22px;
        text-align: left;
    }
    .picture {
        width: 100%;
        align-content: center;
    }
    #video > video {
        width: 90%;
    }
    #totop {
        padding:15px;
        right: 10px;
        bottom: 10px;
    }
    /* Kết */
    #footer {
        display: block;
        height: auto;
    }
    .f_logo{
        display: none;
    }
    .f_block {
        width: 90%;
    }

    /* Dành cho trang About us */
    .members {
        display: block;
        margin-left: 10%;
        margin-right: 10%;
    }
    .member{
        width: 100%;
    }
    #warning{
        display: block;
    }
    /* Dành cho video Youtube */

    .yt_video > iframe {
        width: 100%;
        height: 250px;
    }
}