@media only screen and (max-width: 900px) {
    div#main-menu {
        background: #222426;
    }
    .row.footer_tops {
        margin-left: 30px!important;
    }
    .home_video_s1 {
        position: relative;
        top: 0px!important;
    }
    .home_video_s1 .video-button-wrapper {
        position: absolute;
        margin-left: 38%;
        margin-top: -155px;
    }
    .tieu_de_s_home {
        margin-top: 60px!important;
        text-align: center;
    }
    .row_s3 {
        height: auto;
        background: var(--primary-color);
        border-radius: 16px;
        margin-top: -646px!important;
    }
    .text_s5 {
        margin-top: 440px!important;
    }

}