marty.js

//About What Toggle
(function($){
  $(document).ready(function($) {
    $('.about-what-overview-button-txt-000').click(function(event) {
      event.preventDefault();
      if($(this).parentsUntil('.about-what-region1').find('.about-what-overview-block-320-bottom').hasClass('about-what-toggle-display')) {
        $(this).parentsUntil('.about-what-region1').find('.about-what-overview-block-320-bottom').removeClass('about-what-toggle-display');
        } else {
        $(this).parentsUntil('.about-what-region1').find('.about-what-overview-block-320-bottom').addClass('about-what-toggle-display');
      }
    });
  });
})(jQuery);

marty.scss

.about-what-toggle-display {
  @include breakpoint($b320) {
    display: inline-block;
  }
}