diff --git a/app/(site)/registration/layout.tsx b/app/(site)/registration/layout.tsx
new file mode 100644
index 0000000..5eedbbf
--- /dev/null
+++ b/app/(site)/registration/layout.tsx
@@ -0,0 +1,5 @@
+import { notFound } from "next/navigation";
+
+export default function RegistrationLayout() {
+  notFound();
+}
diff --git a/app/(site)/sponsor/page.tsx b/app/(site)/sponsor/page.tsx
index 1cda845..8f621b4 100644
--- a/app/(site)/sponsor/page.tsx
+++ b/app/(site)/sponsor/page.tsx
@@ -1,12 +1,5 @@
-import type { Metadata } from "next";
-import SponsorPageClient from "@/app/components/sponsor/SponsorPageClient";
-
-export const metadata: Metadata = {
-  title: "Nhà Tài Trợ | IPv6 Enhanced 2026",
-  description:
-    "Trở thành nhà tài trợ tại Hội Nghị IPv6 cho AI & Trung Tâm Dữ Liệu 2026. Kết nối thương hiệu của bạn với những kiến trúc sư của hạ tầng ngày mai.",
-};
+import { notFound } from "next/navigation";
 
 export default function SponsorPage() {
-  return <SponsorPageClient />;
+  notFound();
 }
diff --git a/app/not-found.tsx b/app/not-found.tsx
index 1b45c6c..014815a 100644
--- a/app/not-found.tsx
+++ b/app/not-found.tsx
@@ -14,7 +14,7 @@ export default function NotFound() {
         <h1 className="font-display text-5xl md:text-6xl font-bold text-uni-dark mb-6">404</h1>
         <h2 className="font-display text-2xl md:text-3xl font-bold text-uni-dark mb-4">Page Not Found</h2>
         <p className="text-slate-600 text-lg mb-10 leading-relaxed">
-          The page you're looking for could not be found. It may have been moved or deleted. 
+          The page you&apos;re looking for could not be found. It may have been moved or deleted.
           Please check the URL or return to our home page.
         </p>
 
@@ -22,7 +22,7 @@ export default function NotFound() {
         <div className="flex justify-center">
           <Link 
             href="/" 
-            className="px-8 py-4 bg-uni-dark hover:bg-slate-800 text-white rounded-full font-semibold text-lg transition-all flex items-center justify-center gap-2 shadow-lg"
+            className="px-8 py-4 gold-gradient-bg text-on-primary hover:brightness-110 rounded-full font-semibold text-lg transition-all flex items-center justify-center gap-2 shadow-lg"
           >
             Back to Home <i className="fa-solid fa-arrow-right text-sm"></i>
           </Link>
@@ -30,4 +30,4 @@ export default function NotFound() {
       </div>
     </div>
   );
-}
\ No newline at end of file
+}