@media (min-width: 782px) { 
    /* Show on Desktop, Hide on Mobile */
    .wp-block.desktop-content,
    .editor-styles-wrapper .desktop-content,
    .desktop-content {
        display: block !important;
    }

    .wp-block.mobile-content,
    .editor-styles-wrapper .mobile-content,
    .mobile-content {
        display: none !important;
    }
}

@media (max-width: 781px) {
    /* Show on Mobile, Hide on Desktop */
    .wp-block.desktop-content,
    .editor-styles-wrapper .desktop-content,
    .desktop-content {
        display: none !important;
    }

    .wp-block.mobile-content,
    .editor-styles-wrapper .mobile-content,
    .mobile-content {
        display: block !important;
    }
}