fix mobile menu

assets/javascripts/app.js

@@ -503,7 +503,7 @@
 
   //背景widget設定
   if ( location.href.search('editmode=on') != -1 ) {
-		$('.background').css('z-index','2');
+		$('.background').css('z-index','0');
 	} else {
 		$('.background').css('z-index','-1');
   };

assets/stylesheets/template/modules/gallery.scss

@@ -89,6 +89,7 @@
       background: lighten($theme-gray, 60%);
       margin-bottom: 1.25em;
       border-radius: 0.125em;
+      width: 100%;
 
       @media screen and (max-width: $screen-sm) {
         margin-right: 1.25em;

assets/stylesheets/template/modules/menu.scss

@@ -245,7 +245,7 @@
 
 @media (max-width: 767px) {
   .modules-menu .modules-menu-level-0 {
-    display: unset;
+    flex-direction: column;
   }
 }