diff --git a/tauri/src-tauri/tauri.conf.json b/tauri/src-tauri/tauri.conf.json
index 7b353e3..55ccbc6 100644
--- a/tauri/src-tauri/tauri.conf.json
+++ b/tauri/src-tauri/tauri.conf.json
@@ -5,7 +5,7 @@
   "identifier": "com.lineup.client",
   "build": {
     "beforeDevCommand": "npm run dev",
-    "devUrl": "http://127.0.0.1:1420",
+    "devUrl": "http://192.168.3.13:1420",
     "beforeBuildCommand": "npm run build",
     "frontendDist": "../dist"
   },
diff --git a/tauri/src/main.ts b/tauri/src/main.ts
index 733c8c0..b640f91 100644
--- a/tauri/src/main.ts
+++ b/tauri/src/main.ts
@@ -41,12 +41,15 @@ declare global {
 }
 
 // 这是登录表单首次显示时使用的本地默认地址；用户提交后的地址会保存到 localStorage。
-// `0.0.0.0` is a server bind address, never a browser destination.  When the
-// Web Host is opened locally use loopback; when it is opened through the
-// trusted Tailscale Host use the matching reachable AppServer address.
-const DEFAULT_API = location.hostname === "127.0.0.1" || location.hostname === "localhost"
-  ? "http://127.0.0.1:8090"
-  : "http://100.121.118.116:8090";
+// `0.0.0.0` is a server bind address, never a browser destination.
+// 打包后的 Tauri（Android + macOS）都通过 Tailscale 访问远程 AppServer，
+// 不能用 loopback（手机/沙盒里 127.0.0.1 指向自己），所以走 100.121.118.116。
+// 仅浏览器本地 dev 模式（`http://127.0.0.1:1420` / `http://localhost:1420`）才回退到 loopback。
+const DEFAULT_API = "__TAURI_INTERNALS__" in window
+  ? "http://100.121.118.116:8090"
+  : location.hostname === "127.0.0.1" || location.hostname === "localhost"
+    ? "http://127.0.0.1:8090"
+    : "http://100.121.118.116:8090";
 
 // 这些状态对象属于当前可信 Host 的装配层：Runtime 负责会话、消息和可靠性，
 // 它们负责将 Surface、Capability、Artifact 和执行进度投影到当前页面。