diff --git a/Cargo.lock b/Cargo.lock
index 5187bf8..fbb2382 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2304,7 +2304,7 @@ dependencies = [
 
 [[package]]
 name = "mixvideo-desktop"
-version = "0.2.0"
+version = "0.2.1"
 dependencies = [
  "anyhow",
  "base64 0.22.1",
diff --git a/apps/desktop/src-tauri/src/infrastructure/gemini_service.rs b/apps/desktop/src-tauri/src/infrastructure/gemini_service.rs
index 84997d1..68b64db 100644
--- a/apps/desktop/src-tauri/src/infrastructure/gemini_service.rs
+++ b/apps/desktop/src-tauri/src/infrastructure/gemini_service.rs
@@ -169,7 +169,8 @@ impl Default for RagGroundingConfig {
             model_id: "gemini-2.5-flash".to_string(),
             temperature: 1.0,
             max_output_tokens: 8192,
-            system_prompt: None,
+            system_prompt: "你是一个短视频情景穿搭分析专家, 根据用户预想的情景输出符合逻辑的情景和模特穿搭描述，必须依据已知的数据返回可能的方案, 并且给出参照的依据；
+            如果没有匹配的数据支持，返回空结果;",
         }
     }
 }