diff --git a/bigwork/src/smart_customer_service.py b/bigwork/src/smart_customer_service.py
index 484f62b..86e18f7 100644
--- a/bigwork/src/smart_customer_service.py
+++ b/bigwork/src/smart_customer_service.py
@@ -610,6 +610,11 @@ class SmartCustomerService:
     def _call_deepseek_api(self, user_id: str, churn_prediction: Dict[str, Any], query: str = "") -> str:
         """调用DeepSeek API生成挽留措施"""
         try:
+            # 检查API密钥是否有效
+            if not DEEPSEEK_API_KEY or DEEPSEEK_API_KEY == "your-key-here":
+                st.warning("DeepSeek API密钥未配置或无效，将使用备用方案")
+                return self._generate_mock_retention_plan(user_id, churn_prediction, query)
+            
             # 构建智能提示词（包含用户查询内容）
             prompt = self._build_retention_prompt(user_id, churn_prediction, query)
             
@@ -1079,8 +1084,8 @@ class SmartCustomerService:
         api_url = "https://api.deepseek.com/v1/chat/completions"
         
         # 检查API密钥是否配置
-        if not api_key:
-            print("DeepSeek API密钥未配置，返回默认响应")
+        if not api_key or api_key == "your-key-here":
+            print("DeepSeek API密钥未配置或无效，返回默认响应")
             return "感谢您的反馈。我们的客服团队将尽快处理您的问题，并与您联系。"
         
         # 构建系统提示
@@ -1320,8 +1325,8 @@ class SmartCustomerService:
         api_url = "https://api.deepseek.com/v1/chat/completions"
         
         # 检查API密钥是否配置
-        if not api_key:
-            print("DeepSeek API密钥未配置，返回默认情感分析结果")
+        if not api_key or api_key == "your-key-here":
+            print("DeepSeek API密钥未配置或无效，返回默认情感分析结果")
             return "neutral"
         
         # 构建系统提示