.mtn-mobile-notice {
    display: none;
}

@media (max-width: 768px) {
    .mtn-mobile-notice {
        display: block;
        background: #fffbcc;
        color: #333;
        padding: 12px 14px;
        text-align: left;
        font-size: 14px;
        font-weight: 500;
        border-bottom: 1px solid #e6e6e6;
    }
}