diff --git a/.env b/.env
index 644cfcd..33dcbe3 100644
--- a/.env
+++ b/.env
@@ -14,7 +14,7 @@ DATABASE_URL=file:./prisma/dev.db
 # DATABASE_URL=postgresql://qia_admin:your-password@postgres.ap-shanghai.myqcloud.com:5432/qia
 
 # DeepSeek AI
-DEEPSEEK_API_KEY=sk-7e34702637f74020b62cdd62d3f48559
+DEEPSEEK_API_KEY=sk-3e2019e98c6f406b86ba31c7b820fb51
 DEEPSEEK_API_URL=https://api.deepseek.com/chat/completions
 
 # CORS (支持多个开发端口)
diff --git a/src/routes/ai.ts b/src/routes/ai.ts
index 34d8317..5e60ce6 100644
--- a/src/routes/ai.ts
+++ b/src/routes/ai.ts
@@ -163,8 +163,7 @@ async function callDeepSeek(message: string): Promise<{
   const apiUrl = process.env.DEEPSEEK_API_URL || 'https://api.deepseek.com/chat/completions';
 
   if (!apiKey || apiKey === 'sk-xxx') {
-    // Mock response for development
-    return mockParseResponse(message);
+    throw new Error('DeepSeek API Key 未配置');
   }
 
   try {
@@ -232,16 +231,15 @@ async function callDeepSeek(message: string): Promise<{
         };
       } catch (e) {
         console.error('[AI] Parse error:', e);
-        // Schema validation failed, use mock response
-        return mockParseResponse(message);
+        throw new Error(`AI 解析失败: ${e instanceof Error ? e.message : '未知错误'}`);
       }
     }
 
-    console.warn('[AI] No JSON found in response, using mock');
-    return mockParseResponse(message);
+    console.warn('[AI] No JSON found in response');
+    throw new Error('AI 响应格式错误，未能解析出 JSON');
   } catch (error) {
     console.error('DeepSeek API error:', error);
-    return mockParseResponse(message);
+    throw new Error(`DeepSeek API 调用失败: ${error instanceof Error ? error.message : '未知错误'}`);
   }
 }