diff --git a/miniapp/utils/sankey.js b/miniapp/utils/sankey.js
index 2475d60..0f86ba5 100644
--- a/miniapp/utils/sankey.js
+++ b/miniapp/utils/sankey.js
@@ -19,7 +19,12 @@ function getXlsxModule() {
   try {
     cachedXlsxModule = require('xlsx');
   } catch (error) {
-    cachedXlsxModule = null;
+    // 兜底：兼容开发者工具未正确挂载 npm 解析时，直接从 miniprogram_npm 目录加载。
+    try {
+      cachedXlsxModule = require('../miniprogram_npm/xlsx');
+    } catch (fallbackError) {
+      cachedXlsxModule = null;
+    }
   }
   return cachedXlsxModule;
 }