diff --git a/deploy/edge/conf.d/jiu.conf b/deploy/edge/conf.d/jiu.conf
index 07105c3..5f5d245 100644
--- a/deploy/edge/conf.d/jiu.conf
+++ b/deploy/edge/conf.d/jiu.conf
@@ -47,16 +47,30 @@ server {
         expires 0;
     }
 
-    # 公开商品详情页（扫码跳转）→ 交给 Flutter Web 路由处理
+    # 公开商品详情页（扫码跳转）→ 后端注入 OG 标签后返回 Flutter index.html
     location ~ ^/product/ {
-        root /opt/jiu/web;
-        try_files $uri /app/index.html;
+        proxy_pass         http://127.0.0.1:8080;
+        proxy_set_header   Host $host;
+        proxy_set_header   X-Real-IP $remote_addr;
+        proxy_read_timeout 30s;
     }
 
-    # 扫码页（/scan/<id> → scan.html，JS 从 URL 读取 id）
-    location /scan/ {
-        root /opt/jiu/marketing;
-        try_files /scan.html =404;
+    # Flutter 路由会把 /product/:id 重写为 /app/product/:id（base-href=/app/）
+    # 分享此 URL 时微信爬虫也需要 OG 标签 → 去掉 /app 前缀后转发后端
+    location ~ ^/app/product/ {
+        rewrite ^/app(/product/.+)$ $1 break;
+        proxy_pass         http://127.0.0.1:8080;
+        proxy_set_header   Host $host;
+        proxy_set_header   X-Real-IP $remote_addr;
+        proxy_read_timeout 30s;
+    }
+
+    # 桌面客户端安装包下载（Windows .exe / macOS .zip）
+    location /downloads/ {
+        alias /opt/jiu/downloads/;
+        add_header Content-Disposition "attachment";
+        add_header Cache-Control "no-cache";
+        autoindex off;
     }
 
     # 营销站点兜底（根路径及所有其他路径）