update: トップページのフレームをマークアップ

public/index.html

@@ -345,6 +345,12 @@
           </div>
         </section>
         <section class="top-page__main-illust"></section>
+        <section class="top-page__frame">
+          <section><div></div><div></div><div></div></section>
+          <section><div></div><div></div><div></div></section>
+          <section><div></div><div></div><div></div></section>
+          <section><div></div><div></div><div></div></section>
+        </section>
       </section>
     </main>
     <script type="text/javascript" src="./scripts/app.min.js"></script>