add js

themes/custom/envigo/js/override.js

@@ -186,4 +186,15 @@
                 $grid.masonry('layout');
             });
 
+            $('.h_nav_main li:last-child .header-nav-item-child-list a').on('click', function(event) {
+         //event.preventDefault();
+         var target = $(this).attr('href');
+         var idData = target.substr(target.indexOf("#"));
+            if(idData.length) {
+            $('html, body').animate({
+                  scrollTop: $(idData).offset().top
+               }, 500);
+            }
+         });
+
 })(jQuery);
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