diff --git a/frontend/admin-web/src/services/contractService.ts b/frontend/admin-web/src/services/contractService.ts
index b5290630..9a8fd1a6 100644
--- a/frontend/admin-web/src/services/contractService.ts
+++ b/frontend/admin-web/src/services/contractService.ts
@@ -172,8 +172,8 @@ export const contractService = {
    * 返回下载 URL，前端直接打开进行下载
    */
   getDownloadUrl(orderNo: string): string {
-    // 获取 API 基础 URL
-    const baseUrl = process.env.NEXT_PUBLIC_API_URL || '';
+    // 获取 API 基础 URL（与 .env.production 中的变量名一致）
+    const baseUrl = process.env.NEXT_PUBLIC_API_BASE_URL || '';
     return `${baseUrl}${API_ENDPOINTS.CONTRACTS.DOWNLOAD(orderNo)}`;
   },