diff --git a/.github/demo/stage-profile-en.gif b/.github/demo/stage-profile-en.gif
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diff --git a/.github/demo/stage-profile.gif b/.github/demo/stage-profile-zh.gif
similarity index 100%
rename from .github/demo/stage-profile.gif
rename to .github/demo/stage-profile-zh.gif
diff --git a/.github/demo/url-audit-en.gif b/.github/demo/url-audit-en.gif
new file mode 100644
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diff --git a/.github/demo/url-audit.gif b/.github/demo/url-audit-zh.gif
similarity index 100%
rename from .github/demo/url-audit.gif
rename to .github/demo/url-audit-zh.gif
diff --git a/README.md b/README.md
index 0deef1e..5d13af0 100644
--- a/README.md
+++ b/README.md
@@ -17,12 +17,12 @@ see [Privacy](#privacy).)
 **Stage Profile** — drop in a GPX and get a Tour-style stage chart: hover readout,
 auto-categorized climbs, and switchable export themes (including midnight dark):
 
-![Stage Profile demo](.github/demo/stage-profile.gif)
+![Stage Profile demo](.github/demo/stage-profile-en.gif)
 
 **URL Audit** — paste a URL and get an SEO / social-card / AI-readiness score with a
 simulated share preview (here it is auditing one of its own pages — 100/100):
 
-![URL Audit demo](.github/demo/url-audit.gif)
+![URL Audit demo](.github/demo/url-audit-en.gif)
 
 ## Features
 
diff --git a/README.zh-TW.md b/README.zh-TW.md
index 88d9af4..04ca310 100644
--- a/README.zh-TW.md
+++ b/README.zh-TW.md
@@ -16,12 +16,12 @@
 **賽段剖面圖**——丟進 GPX 就生成環法風賽段圖：游標讀數、爬坡自動分級、
 可切換出圖主題（含午夜黑深色）：
 
-![賽段剖面圖示範](.github/demo/stage-profile.gif)
+![賽段剖面圖示範](.github/demo/stage-profile-zh.gif)
 
 **網址健檢**——貼上網址，評 SEO／社群分享卡／AI 引擎就緒度並模擬分享預覽
 （示範裡掃的是它自己的工具頁——100 分滿分）：
 
-![網址健檢示範](.github/demo/url-audit.gif)
+![網址健檢示範](.github/demo/url-audit-zh.gif)
 
 ## 特色