diff --git a/server/ai/client.js b/server/ai/client.js
index 85601ed..62220c7 100644
--- a/server/ai/client.js
+++ b/server/ai/client.js
@@ -19,9 +19,10 @@ function getErrorMsg(status, data) {
   }
 }
 
-async function callDeepSeek(messages, userId, temperature = 0.1) {
+async function callDeepSeek(messages, userId, temperature = 0.1, jsonMode = true) {
   console.log('调用 DeepSeek...');
   var body = { model: 'deepseek-v4-flash', messages: messages, temperature: temperature, stream: false, thinking: { type: 'disabled' } };
+  if (jsonMode) body.response_format = { type: 'json_object' };
   if (userId) body.user_id = sanitizeUserId(userId);
   var res = await fetch('https://api.deepseek.com/chat/completions', {
     method: 'POST',
diff --git a/server/handlers.js b/server/handlers.js
index 62d0881..6c51851 100644
--- a/server/handlers.js
+++ b/server/handlers.js
@@ -187,7 +187,7 @@ async function callDeepSeekForSummary(prompt, userId) {
     { role: 'system', content: '你是一个财务助手，请根据采购记录生成简洁回复。' },
     { role: 'user', content: prompt }
   ];
-  return callDeepSeek(messages, userId);
+  return callDeepSeek(messages, userId, 0.3, false);
 }
 
 module.exports = {