diff --git a/public/scenes/demo.json b/public/scenes/demo.json
index 9fb72c3..8ebe808 100644
--- a/public/scenes/demo.json
+++ b/public/scenes/demo.json
@@ -33,43 +33,43 @@
     }
   ],
   "endings": [
-    { "id": "trust_end", "label": "信任的伙伴", "sceneId": "trust_ending", "chapterId": "ch1", "thumbnail": "images/end_trust.jpg" },
-    { "id": "alone_end", "label": "独行之路", "sceneId": "alone_ending", "chapterId": "ch1", "thumbnail": "images/end_alone.jpg" },
-    { "id": "continue_end", "label": "继续前行", "sceneId": "continue_ending", "chapterId": "ch3", "thumbnail": "images/end_continue.jpg" }
+    { "id": "trust_end", "label": "信任的伙伴", "sceneId": "trust_ending", "chapterId": "ch1", "thumbnail": "demo/ui/images/end_trust.jpg" },
+    { "id": "alone_end", "label": "独行之路", "sceneId": "alone_ending", "chapterId": "ch1", "thumbnail": "demo/ui/images/end_alone.jpg" },
+    { "id": "continue_end", "label": "继续前行", "sceneId": "continue_ending", "chapterId": "ch3", "thumbnail": "demo/ui/images/end_continue.jpg" }
   ],
   "chapters": [
     {
       "id": "ch1",
       "label": "第一章：醒来",
       "startScene": "intro",
-      "thumbnail": "images/ch1.jpg",
+      "thumbnail": "demo/ui/images/ch1.jpg",
       "defaultVariables": { "trust": 50, "courage": 0, "investigation": 0 }
     },
     {
       "id": "ch2",
       "label": "第二章：调查",
       "startScene": "desk_detail",
-      "thumbnail": "images/ch2.jpg",
+      "thumbnail": "demo/ui/images/ch2.jpg",
       "defaultVariables": { "trust": 60, "courage": 10, "investigation": 1 }
     },
     {
       "id": "ch3",
       "label": "第三章：终局",
       "startScene": "qte_success",
-      "thumbnail": "images/ch3.jpg",
+      "thumbnail": "demo/ui/images/ch3.jpg",
       "defaultVariables": { "trust": 70, "courage": 20, "investigation": 2 }
     }
   ],
   "scenes": {
     "intro": {
       "id": "intro",
-      "videoUrl": "videos/intro.mp4",
-      "subtitleUrl": "subtitles/intro.vtt",
+      "videoUrl": "demo/intro/intro.mp4",
+      "subtitleUrl": "demo/intro/intro.vtt",
       "subtitles": {
-        "zh": "subtitles/intro.vtt",
-        "en": "subtitles/intro_en.vtt"
+        "zh": "demo/intro/intro.vtt",
+        "en": "demo/intro/intro_en.vtt"
       },
-      "bgmUrl": "audio/calm_bgm.mp3",
+      "bgmUrl": "demo/shared/calm_bgm.mp3",
       "bgmVolume": 0.6,
       "bgmCrossFade": 1.5,
       "videoMuted": true,
@@ -106,8 +106,8 @@
       "id": "investigation_site",
       "type": "image",
       "videoUrl": "",
-      "imageUrl": "images/investigation_scene.jpg",
-      "subtitleUrl": "subtitles/investigation.vtt",
+      "imageUrl": "demo/investigation_site/investigation_scene.jpg",
+      "subtitleUrl": "demo/investigation_site/investigation.vtt",
       "hotspots": [
         {
           "id": "hs_desk",
@@ -143,7 +143,7 @@
     },
     "corridor": {
       "id": "corridor",
-      "videoUrl": "videos/corridor.mp4",
+      "videoUrl": "demo/corridor/corridor.mp4",
       "hotspots": [
         {
           "id": "hs_left",
@@ -173,8 +173,8 @@
     },
     "left_door": {
       "id": "left_door",
-      "videoUrl": "videos/left_door.mp4",
-      "subtitleUrl": "subtitles/left_door.vtt",
+      "videoUrl": "demo/left_door/left_door.mp4",
+      "subtitleUrl": "demo/left_door/left_door.vtt",
       "choices": [
         {
           "text": "与陌生人握手",
@@ -193,9 +193,9 @@
     },
     "right_door": {
       "id": "right_door",
-      "videoUrl": "videos/right_door.mp4",
+      "videoUrl": "demo/right_door/right_door.mp4",
       "skippable": false,
-      "bgmUrl": "audio/tense_bgm.mp3",
+      "bgmUrl": "demo/right_door/tense_bgm.mp3",
       "bgmVolume": 0.7,
       "bgmCrossFade": 2.0,
       "videoMuted": true,
@@ -217,7 +217,7 @@
     },
     "qte_success": {
       "id": "qte_success",
-      "videoUrl": "videos/qte_success.mp4",
+      "videoUrl": "demo/qte_success/qte_success.mp4",
       "choices": [
         {
           "text": "继续前进",
@@ -231,7 +231,7 @@
     },
     "qte_fail": {
       "id": "qte_fail",
-      "videoUrl": "videos/qte_fail.mp4",
+      "videoUrl": "demo/qte_fail/qte_fail.mp4",
       "choices": [
         {
           "text": "继续前进",
@@ -245,7 +245,7 @@
     },
     "desk_detail": {
       "id": "desk_detail",
-      "videoUrl": "videos/continue_ending.mp4",
+      "videoUrl": "demo/shared/continue_ending.mp4",
       "choices": [
         {
           "text": "返回调查现场",
@@ -259,9 +259,9 @@
     },
     "stay": {
       "id": "stay",
-      "videoUrl": "videos/stay_loop.mp4",
-      "subtitleUrl": "subtitles/stay.vtt",
-      "bgmUrl": "audio/calm_bgm.mp3",
+      "videoUrl": "demo/stay/stay_loop.mp4",
+      "subtitleUrl": "demo/stay/stay.vtt",
+      "bgmUrl": "demo/shared/calm_bgm.mp3",
       "bgmVolume": 0.6,
       "videoMuted": true,
       "loopStart": 3.0,
@@ -272,7 +272,7 @@
     },
     "trust_ending": {
       "id": "trust_ending",
-      "videoUrl": "videos/trust_ending.mp4",
+      "videoUrl": "demo/trust_ending/trust_ending.mp4",
       "choices": [
         {
           "text": "开启信任的旅程（需要 trust >= 80）",
@@ -291,12 +291,12 @@
     },
     "secret_ending": {
       "id": "secret_ending",
-      "videoUrl": "videos/continue_ending.mp4",
+      "videoUrl": "demo/shared/continue_ending.mp4",
       "choices": []
     },
     "alone_ending": {
       "id": "alone_ending",
-      "videoUrl": "videos/alone_ending.mp4",
+      "videoUrl": "demo/alone_ending/alone_ending.mp4",
       "choices": [],
       "onEnter": [
         { "type": "set", "target": "completed_game", "value": 1 }
@@ -304,7 +304,7 @@
     },
     "continue_ending": {
       "id": "continue_ending",
-      "videoUrl": "videos/continue_ending.mp4",
+      "videoUrl": "demo/shared/continue_ending.mp4",
       "choices": []
     }
   }