diff --git a/electron/main/ipc.ts b/electron/main/ipc.ts
index b5a3469..8a59f4a 100644
--- a/electron/main/ipc.ts
+++ b/electron/main/ipc.ts
@@ -322,9 +322,14 @@ ${extras?.maxScore ?? 100}
     timeout: ((getStore().get('timeout') as number) ?? 120) * 1000
   })
 
-  const content = response.data.choices[0].message.content
+  const content = response.data?.choices?.[0]?.message?.content
+  if (!content) {
+    log.error('AI API 返回为空或格式异常:', JSON.stringify(response.data).slice(0, 1000))
+    throw new Error(`API 返回为空，请检查模型名是否正确 (当前: ${config.model})`)
+  }
   const parsed = tryParseJson(content)
   if (!parsed) {
+    log.error('AI 返回 JSON 解析失败:', content.slice(0, 500))
     throw new Error(`AI 返回格式异常，无法解析为 JSON。原始返回：\n${content}`)
   }
   return {
diff --git a/electron/main/window.ts b/electron/main/window.ts
index ff4a13d..2ca0bac 100644
--- a/electron/main/window.ts
+++ b/electron/main/window.ts
@@ -61,7 +61,7 @@ export function openDialogWindow(type: string): BrowserWindow | null {
     settings: { width: 520, height: 560 },
     history: { width: 800, height: 600 },
     templates: { width: 640, height: 520 },
-    rubric: { width: 520, height: 480 },
+    rubric: { width: 640, height: 700 },
     result: { width: 440, height: 560 }
   }
   const size = sizes[type] || { width: 500, height: 500 }
diff --git a/src/components/RubricEditor.vue b/src/components/RubricEditor.vue
index cc2c18a..6c89756 100644
--- a/src/components/RubricEditor.vue
+++ b/src/components/RubricEditor.vue
@@ -130,5 +130,7 @@ function handleClose() {
   border: 1px solid #e4e7ed;
   border-radius: 6px;
   padding: 16px;
+  max-height: 480px;
+  overflow-y: auto;
 }
 </style>
\ No newline at end of file