diff --git a/backend/apps/generation/views.py b/backend/apps/generation/views.py
index 6fe927d..bd320cb 100644
--- a/backend/apps/generation/views.py
+++ b/backend/apps/generation/views.py
@@ -91,12 +91,15 @@ def _format_prompt_for_ark(prompt, label_placeholders):
     return result
 
 
-_ORPHAN_MATERIAL_MENTION_RE = re.compile(r'@(?:图片|视频|音频|素材)\S*')
+_ORPHAN_MATERIAL_MENTION_RE = re.compile(r'@(?:图片|视频|音频|素材)[^\s，。！？、；：,.!?;:)）]*')
 
 
-def _has_orphan_material_mention(prompt, references):
-    """Detect a material @mention in prompt when no reference payload arrived."""
-    return bool(prompt and not references and _ORPHAN_MATERIAL_MENTION_RE.search(prompt))
+def _find_orphan_material_mention(prompt, references):
+    """Return a material @mention in prompt when no reference payload arrived."""
+    if not prompt or references:
+        return None
+    match = _ORPHAN_MATERIAL_MENTION_RE.search(prompt)
+    return match.group(0) if match else None
 
 
 def _get_token_price(config, model, has_video_ref, resolution):
@@ -239,7 +242,8 @@ def video_generate_view(request):
     search_mode = request.data.get('search_mode', 'off')
     seed = _safe_int(request.data.get('seed', -1), -1)
 
-    if _has_orphan_material_mention(prompt, references):
+    orphan_mention = _find_orphan_material_mention(prompt, references)
+    if orphan_mention:
         logger.warning(
             'Blocked generate with material @mention but empty references (user=%s prompt=%s)',
             user.id,
@@ -247,7 +251,7 @@ def video_generate_view(request):
         )
         return Response({
             'error': 'missing_references',
-            'message': '@对应的内容为空',
+            'message': f'{orphan_mention} 对应的内容为空',
         }, status=status.HTTP_400_BAD_REQUEST)
 
     # 1080P 仅 Seedance 2.0 支持，Fast 不支持
diff --git a/backend/tests/test_ark_prompt_format.py b/backend/tests/test_ark_prompt_format.py
index dcc6e6f..6e5b536 100644
--- a/backend/tests/test_ark_prompt_format.py
+++ b/backend/tests/test_ark_prompt_format.py
@@ -152,7 +152,7 @@ class TestVideoGenerateArkPrompt(TestCase):
         resp = self._post_generate('@图片1 走过来', [])
         self.assertEqual(resp.status_code, 400, resp.content)
         self.assertEqual(resp.json().get('error'), 'missing_references')
-        self.assertEqual(resp.json().get('message'), '@对应的内容为空')
+        self.assertEqual(resp.json().get('message'), '@图片1 对应的内容为空')
         self.assertFalse(mock_create_task.called)
         self.assertFalse(GenerationRecord.objects.filter(user=self.user).exists())
 
diff --git a/web/src/store/generation.ts b/web/src/store/generation.ts
index c415a42..69bb2b0 100644
--- a/web/src/store/generation.ts
+++ b/web/src/store/generation.ts
@@ -54,13 +54,14 @@ function mapProgress(backendStatus: string): number {
   return 50;
 }
 
-const ORPHAN_MATERIAL_MENTION_RE = /@(?:图片|视频|音频|素材)\S*/;
+const ORPHAN_MATERIAL_MENTION_RE = /@(?:图片|视频|音频|素材)[^\s，。！？、；：,.!?;:)）]*/;
 
-function hasOrphanMaterialMention(input: ReturnType<typeof useInputBarStore.getState>): boolean {
-  if (input.mode !== 'universal') return false;
+function findOrphanMaterialMention(input: ReturnType<typeof useInputBarStore.getState>): string | null {
+  if (input.mode !== 'universal') return null;
   const hasDirectRefs = input.references.length > 0;
   const hasAssetMentions = (input.assetMentions || []).length > 0;
-  return !hasDirectRefs && !hasAssetMentions && ORPHAN_MATERIAL_MENTION_RE.test(input.prompt);
+  if (hasDirectRefs || hasAssetMentions) return null;
+  return input.prompt.match(ORPHAN_MATERIAL_MENTION_RE)?.[0] || null;
 }
 
 /** Check if a URL is an asset library reference (case-insensitive protocol). */
@@ -323,8 +324,9 @@ export const useGenerationStore = create<GenerationState>((set, get) => ({
 
   addTask: async () => {
     const input = useInputBarStore.getState();
-    if (hasOrphanMaterialMention(input)) {
-      showToast('@对应的内容为空');
+    const orphanMention = findOrphanMaterialMention(input);
+    if (orphanMention) {
+      showToast(`${orphanMention} 对应的内容为空`);
       return null;
     }
     if (!input.canSubmit()) return null;