diff --git a/README.ja.md b/README.ja.md
index ce7e8a7..db1f313 100644
--- a/README.ja.md
+++ b/README.ja.md
@@ -10,7 +10,7 @@
 
 無料、オープンソース、ローカル処理。**ログイン不要、アップロード不要、難しい設定不要。** 動画を追加し、画質を選ぶだけで Mac 上で変換できます。
 
-![MP4Flow の機能デモ](docs/assets/mp4flow-demo.gif)
+![MP4Flow の日本語画面](website/assets/mp4flow-working-screen-ja.png)
 
 ## 3ステップで始める
 
diff --git a/README.md b/README.md
index e78431c..7328699 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@
 
 Free, open source, and local. **No account, no upload, no codec jargon.** Add a video, choose a quality, and convert it on your Mac.
 
-![MP4Flow feature demo](docs/assets/mp4flow-demo.gif)
+![MP4Flow running in English](website/assets/mp4flow-working-screen-en.png)
 
 ## Start in 3 steps
 
diff --git a/README.zh-CN.md b/README.zh-CN.md
index ecd15bc..a1f0f2b 100644
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -10,7 +10,7 @@
 
 免费、开源、本地处理。**不用登录、不用上传、不用会看参数。** 添加视频，选择画质，在你的 Mac 上完成转换。
 
-![MP4Flow 功能演示](docs/assets/mp4flow-demo.gif)
+![MP4Flow 中文界面](website/assets/mp4flow-working-screen.png)
 
 ## 三步上手
 
diff --git a/docs/GITHUB_METADATA.md b/docs/GITHUB_METADATA.md
index c06e7ae..3600278 100644
--- a/docs/GITHUB_METADATA.md
+++ b/docs/GITHUB_METADATA.md
@@ -16,6 +16,10 @@ of the product's public download path, not optional decoration.
 - Keep [README.md](../README.md), [README.ja.md](../README.ja.md), and
   [README.zh-CN.md](../README.zh-CN.md) equivalent in scope. English aids
   global discovery; Japanese and Chinese serve native-language users.
+- Use the matching real, localized app capture from `website/assets/` near the
+  top of each README. When screenshots change, update the website and all three
+  README image references together; keep the social card based on the English
+  capture.
 - Link the latest release rather than a versioned DMG in README text. This
   avoids leaving visitors on a stale installer after the next release.
 - Attach a `.dmg` and matching `.sha256` file to every stable release. Do not
diff --git a/website/assets/mp4flow-working-screen-en.png b/website/assets/mp4flow-working-screen-en.png
index 3dc5eb3..6048efa 100644
Binary files a/website/assets/mp4flow-working-screen-en.png and b/website/assets/mp4flow-working-screen-en.png differ
diff --git a/website/assets/mp4flow-working-screen-ja.png b/website/assets/mp4flow-working-screen-ja.png
index 6ce1d39..3b74832 100644
Binary files a/website/assets/mp4flow-working-screen-ja.png and b/website/assets/mp4flow-working-screen-ja.png differ
diff --git a/website/assets/mp4flow-working-screen.png b/website/assets/mp4flow-working-screen.png
index 42e310d..1ca2c02 100644
Binary files a/website/assets/mp4flow-working-screen.png and b/website/assets/mp4flow-working-screen.png differ
diff --git a/website/assets/social-preview.jpg b/website/assets/social-preview.jpg
index f2d179a..973e82d 100644
Binary files a/website/assets/social-preview.jpg and b/website/assets/social-preview.jpg differ
diff --git a/website/index.html b/website/index.html
index 49b1b8a..f3ece68 100644
--- a/website/index.html
+++ b/website/index.html
@@ -21,8 +21,8 @@
     <meta property="og:locale:alternate" content="ja_JP" />
     <meta property="og:title" content="MP4Flow｜智能转换、剪切、裁切、旋转，全部在 Mac 本地完成" />
     <meta property="og:description" content="免费开源的原生 macOS 视频转 MP4 工具。极速处理、不上传视频、不用登录。" />
-    <meta property="og:image" content="https://ixiehao.github.io/MP4Flow/assets/social-preview.jpg?v=1" />
-    <meta property="og:image:secure_url" content="https://ixiehao.github.io/MP4Flow/assets/social-preview.jpg?v=1" />
+    <meta property="og:image" content="https://ixiehao.github.io/MP4Flow/assets/social-preview.jpg?v=2" />
+    <meta property="og:image:secure_url" content="https://ixiehao.github.io/MP4Flow/assets/social-preview.jpg?v=2" />
     <meta property="og:image:type" content="image/jpeg" />
     <meta property="og:image:width" content="1280" />
     <meta property="og:image:height" content="640" />
@@ -30,7 +30,7 @@
     <meta name="twitter:card" content="summary_large_image" />
     <meta name="twitter:title" content="MP4Flow｜智能转换、剪切、裁切、旋转，全部在 Mac 本地完成" />
     <meta name="twitter:description" content="免费开源的原生 macOS 视频转 MP4 工具。极速处理、不上传视频、不用登录。" />
-    <meta name="twitter:image" content="https://ixiehao.github.io/MP4Flow/assets/social-preview.jpg?v=1" />
+    <meta name="twitter:image" content="https://ixiehao.github.io/MP4Flow/assets/social-preview.jpg?v=2" />
     <meta name="twitter:image:alt" content="MP4Flow 真实软件工作界面，展示在 Mac 本地完成的视频转换" />
     <title>MP4Flow｜智能转换、剪切、裁切、旋转的 macOS 视频转 MP4 工具</title>
     <link rel="icon" type="image/png" sizes="1024x1024" href="assets/mp4flow-app-icon.png" />