diff --git a/README.md b/README.md
index 36f4ee6..c700c03 100644
--- a/README.md
+++ b/README.md
@@ -263,6 +263,8 @@ APP_DEEP_LINK_URL=
 
 平台地址未配置时，按钮显示“前往下载页”，沿用上游 `AppAddr` 或 `/app/download/` 跳转；未配置 App 深链时隐藏打开 App 入口。链接保留原始跳转地址，不生成设计示例中的安装包、描述文件或 App Store 地址。
 
+谷歌统计（GA4）由 `GOOGLE_ANALYTICS_ID` 配置，三套环境默认 `G-269F3ZFQFQ`，在根布局通过 `next/script` 于页面可交互后加载；留空即关闭。
+
 所有 Telegram 联系入口（页尾、官方导航、回家的路、播放页链接、2257/DMCA、意见反馈，以及 Telegram 形式的「联系我们」客服链接）统一使用 `CONTACT_TELEGRAM_URL`，三套环境默认 `https://t.me/jbd125`，覆盖上游 `tgGroup`、`telegram`、`telegramAdd`。值无效时回退为默认账号。
 
 ## 接口和媒体
diff --git a/config/development.env b/config/development.env
index 986b4d2..6f469cd 100644
--- a/config/development.env
+++ b/config/development.env
@@ -17,6 +17,8 @@ M3U8_KEY_FILE=./config/secrets/m3u8.key
 SEO_INDEXNOW_KEY=d8e5b742d13809c10865fc3b29de24ee
 SEO_BAIDU_SITE_VERIFICATION=
 SEO_BAIDU_HTML_FILE=
+# Google Analytics 4 measurement ID; leave empty to disable.
+GOOGLE_ANALYTICS_ID=G-269F3ZFQFQ
 # Telegram contact for every TG entry (footer, navigation, return-home, legal pages, customer service).
 CONTACT_TELEGRAM_URL=https://t.me/jbd125
 APP_IOS_STORE_URL=
diff --git a/config/production.env b/config/production.env
index 413eafe..2316d8d 100644
--- a/config/production.env
+++ b/config/production.env
@@ -13,6 +13,8 @@ M3U8_KEY_FILE=./config/secrets/m3u8.key
 SEO_INDEXNOW_KEY=d8e5b742d13809c10865fc3b29de24ee
 SEO_BAIDU_SITE_VERIFICATION=
 SEO_BAIDU_HTML_FILE=
+# Google Analytics 4 measurement ID; leave empty to disable.
+GOOGLE_ANALYTICS_ID=G-269F3ZFQFQ
 # Telegram contact for every TG entry (footer, navigation, return-home, legal pages, customer service).
 CONTACT_TELEGRAM_URL=https://t.me/jbd125
 APP_IOS_STORE_URL=
diff --git a/config/test.env b/config/test.env
index 0cd4e99..4d88cbc 100644
--- a/config/test.env
+++ b/config/test.env
@@ -13,6 +13,8 @@ M3U8_KEY_FILE=./config/secrets/m3u8.key
 SEO_INDEXNOW_KEY=d8e5b742d13809c10865fc3b29de24ee
 SEO_BAIDU_SITE_VERIFICATION=
 SEO_BAIDU_HTML_FILE=
+# Google Analytics 4 measurement ID; leave empty to disable.
+GOOGLE_ANALYTICS_ID=G-269F3ZFQFQ
 # Telegram contact for every TG entry (footer, navigation, return-home, legal pages, customer service).
 CONTACT_TELEGRAM_URL=https://t.me/jbd125
 APP_IOS_STORE_URL=
diff --git a/src/app/layout.tsx b/src/app/layout.tsx
index 1140b8d..e35c71c 100644
--- a/src/app/layout.tsx
+++ b/src/app/layout.tsx
@@ -38,6 +38,8 @@ import "@/styles/pages/playback.css";
 import "@/styles/overrides/pwa-safe-area.css";
 import type { ReactNode } from "react";
 import { PwaProvider } from "@/components/pwa/PwaProvider";
+import { GoogleAnalytics } from "@/components/analytics/GoogleAnalytics";
+import { serverConfig } from "@/server/config";
 import { pwaViewport } from "@/lib/pwa/config";
 import { getRequestPage } from "@/server/react/request-page";
 import { toNextMetadata } from "@/server/seo";
@@ -81,7 +83,7 @@ export default async function RootLayout({
           />
         )}
       </head>
-      <body className={presentation.bodyClass}><PwaProvider />{children}</body>
+      <body className={presentation.bodyClass}><PwaProvider />{children}<GoogleAnalytics id={serverConfig().googleAnalyticsID} /></body>
     </html>
   );
 }
diff --git a/src/components/analytics/GoogleAnalytics.tsx b/src/components/analytics/GoogleAnalytics.tsx
new file mode 100644
index 0000000..96223e0
--- /dev/null
+++ b/src/components/analytics/GoogleAnalytics.tsx
@@ -0,0 +1,17 @@
+import Script from "next/script";
+
+/** Google tag (gtag.js); loads after hydration so it never blocks rendering. */
+export function GoogleAnalytics({ id }: { id: string }) {
+  if (!id) return null;
+  return (
+    <>
+      <Script
+        src={`https://www.googletagmanager.com/gtag/js?id=${id}`}
+        strategy="afterInteractive"
+      />
+      <Script id="google-analytics" strategy="afterInteractive">
+        {`window.dataLayer=window.dataLayer||[];function gtag(){dataLayer.push(arguments);}gtag('js',new Date());gtag('config',${JSON.stringify(id)});`}
+      </Script>
+    </>
+  );
+}
diff --git a/src/server/config.ts b/src/server/config.ts
index bcb7c59..1942f10 100644
--- a/src/server/config.ts
+++ b/src/server/config.ts
@@ -25,6 +25,8 @@ export function serverConfig() {
     timeout: Math.max(100, Number(process.env.UPSTREAM_TIMEOUT_MS) || 20000),
     m3u8KeyFile: process.env.M3U8_KEY_FILE || './config/secrets/m3u8.key',
     navigationOnly: process.env.NAVIGATION_ONLY === 'true',
+    /** Google Analytics 4 measurement ID; empty or invalid disables the Google tag. */
+    googleAnalyticsID: /^G-[A-Z0-9]{4,20}$/.test((process.env.GOOGLE_ANALYTICS_ID || '').trim()) ? (process.env.GOOGLE_ANALYTICS_ID || '').trim() : '',
     /** Every Telegram contact entry points here, overriding the upstream tgGroup/telegram/telegramAdd. */
     contactTelegramURL: installationURL(process.env.CONTACT_TELEGRAM_URL) || 'https://t.me/jbd125',
     installation: {