diff --git a/web-to-ppt/popup.js b/web-to-ppt/popup.js
index 38868df..9acc4d4 100644
--- a/web-to-ppt/popup.js
+++ b/web-to-ppt/popup.js
@@ -89,7 +89,13 @@ async function exportPptx() {
     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: dataUrl, filename });
+    try {
+      const dlId = await chrome.downloads.download({ url: dataUrl, filename });
+      console.log('[WebToPPT] download id:', dlId);
+    } catch (e) {
+      console.error('[WebToPPT] download error:', e.message, e);
+      throw e;
+    }
 
     setProgress(100, '导出完成');
     setResult('success', '导出完成');