diff --git a/src/app/layout.tsx b/src/app/layout.tsx
index 3fce244..14a3714 100644
--- a/src/app/layout.tsx
+++ b/src/app/layout.tsx
@@ -13,7 +13,7 @@ const inter = Inter({ subsets: ['latin'] });
 
 // 动态生成 metadata，支持配置更新后的标题变化
 export async function generateMetadata(): Promise<Metadata> {
-  let siteName = process.env.SITE_NAME;
+  let siteName = process.env.SITE_NAME || 'MoonTV';
   if (process.env.NEXT_PUBLIC_STORAGE_TYPE !== 'd1') {
     const config = await getConfig();
     siteName = config.SiteConfig.SiteName;