diff --git a/web-to-ppt/popup.js b/web-to-ppt/popup.js
index 9a12f32..123c96c 100644
--- a/web-to-ppt/popup.js
+++ b/web-to-ppt/popup.js
@@ -104,15 +104,22 @@ async function exportPptx() {
     // 4. 生成 PPTX
     setProgress(90, '正在打包...');
     const blob = await WebToPPT.schemaToPptxBlob(schema);
+    console.log('[WebToPPT] blob size:', blob.size, 'type:', blob.type);
 
-    // 5. 下载（弹出保存对话框）
+    // 5. 下载
     setProgress(95, '正在下载...');
     const url = URL.createObjectURL(blob);
     const title = jsonData.source?.title || 'webpage';
     const safeTitle = title.replace(/[\\/:*?"<>|]+/g, '-').replace(/\s+/g, '-').slice(0, 64) || 'webpage';
     const filename = `web-to-ppt/${safeTitle}-${Date.now()}.pptx`;
 
-    await chrome.downloads.download({ url, filename });
+    try {
+      const dlId = await chrome.downloads.download({ url, filename });
+      console.log('[WebToPPT] download started, id:', dlId);
+    } catch (dlErr) {
+      console.error('[WebToPPT] download failed:', dlErr);
+      throw dlErr;
+    }
     setTimeout(() => URL.revokeObjectURL(url), 60000);
 
     setProgress(100, `已导出：${filename}`);