@media only screen and (max-width: 900px) {
    div#main-menu {
        background: #222426;
    }
    .row.footer_tops {
        margin-left: 30px!important;
    }
    h2.son_home {
        margin-left: 0px;
        padding: 20px;
        background: #40B349;
        border-radius: 0px 37px;
        color: #f0f0f1;
        font-size: 16px;
        min-width: 288px;
        min-height: 51px;
        transform: rotate(0deg);
        text-transform: uppercase;
        /* background: blueviolet; */
        left: -81px;
        margin-top: 0px;
    }
    .owl-nav {
        display: none;
    }
    .owl-dots {
        display: none;
    }
    .slide-item_quy {
        text-align: center;
        width: 50%;
        float: left;
    }
    div#masthead i {
        color: #f00;
    }
    .flex-col.show-for-medium.flex-right .button.is-outline, input[type='submit'].is-outline, input[type='reset'].is-outline, input[type='button'].is-outline {
        border: 2px solid red;
        /* background-color: #666; */
    }

}