diff --git a/src/core/importer.ts b/src/core/importer.ts
index f9e067b..951c648 100644
--- a/src/core/importer.ts
+++ b/src/core/importer.ts
@@ -8,6 +8,8 @@
  * ===================================================================== */
 import type { Slide, SlideElement } from './types'
 import { createElement } from './sample'
+// 本地打包 pdf.js worker（避免依赖 CDN，离线/桌面/内网可用）
+import pdfWorkerUrl from 'pdfjs-dist/build/pdf.worker.min.mjs?url'
 
 /** 允许的图片扩展名 */
 const IMAGE_EXTS = new Set(['.png', '.jpg', '.jpeg', '.gif', '.webp', '.svg', '.bmp', '.ico'])
@@ -81,8 +83,7 @@ function readAsText(file: File): Promise<string> {
 
 export async function extractPdfText(file: File): Promise<string> {
   const pdfjsLib: any = await import('pdfjs-dist')
-  pdfjsLib.GlobalWorkerOptions.workerSrc =
-    `https://cdnjs.cloudflare.com/ajax/libs/pdf.js/${pdfjsLib.version}/pdf.worker.min.mjs`
+  pdfjsLib.GlobalWorkerOptions.workerSrc = pdfWorkerUrl
 
   const buffer = await readAsArrayBuffer(file)
   const pdf = await pdfjsLib.getDocument({ data: buffer }).promise