diff --git a/web/src/components/Toolbar.tsx b/web/src/components/Toolbar.tsx
index 397aaf3..e9346d6 100644
--- a/web/src/components/Toolbar.tsx
+++ b/web/src/components/Toolbar.tsx
@@ -87,11 +87,10 @@ const ratioItems = [
   { label: '3:4', value: '3:4' as AspectRatio },
 ];
 
-const durationItems = [
-  { label: '5s', value: '5' },
-  { label: '10s', value: '10' },
-  { label: '15s', value: '15' },
-];
+const durationItems = Array.from({ length: 12 }, (_, i) => {
+  const v = i + 4;
+  return { label: `${v}s`, value: String(v) };
+});
 
 const modeLabels: Record<CreationMode, string> = {
   universal: '全能参考',
diff --git a/web/src/types/index.ts b/web/src/types/index.ts
index 4a8878f..578bab9 100644
--- a/web/src/types/index.ts
+++ b/web/src/types/index.ts
@@ -1,7 +1,7 @@
 export type CreationMode = 'universal' | 'keyframe';
 export type ModelOption = 'seedance_2.0' | 'seedance_2.0_fast';
 export type AspectRatio = '16:9' | '9:16' | '1:1' | '21:9' | '4:3' | '3:4';
-export type Duration = 5 | 10 | 15;
+export type Duration = 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15;
 export type GenerationType = 'video' | 'image';
 
 export interface UploadedFile {