diff --git a/lib/core/config/app_config.dart b/lib/core/config/app_config.dart
index ae4f632..de06a15 100644
--- a/lib/core/config/app_config.dart
+++ b/lib/core/config/app_config.dart
@@ -9,14 +9,13 @@ import 'package:flutter/foundation.dart';
 class AppConfig {
   const AppConfig._();
 
-  /// 真机默认使用的开发机局域网地址。
+  /// 真机默认使用的服务地址。
   ///
-  /// 这个地址跟着电脑所在的网络走，换网络后要用
-  /// `ipconfig getifaddr en0` 重新确认。默认值只改这一行。
-  static const String devHostBaseUrl = 'http://192.168.31.187:8081';
+  /// 当前指向公网服务；换地址时改这一行。
+  static const String devHostBaseUrl = 'http://39.162.50.99:8081';
 
-  /// 办公室内网（Wi-Fi）直连地址，双网络自动切换时的首选。
-  static const String lanBaseUrl = 'http://192.168.31.250:8081';
+  /// 双网络探测的首选地址，当前与默认地址一致（公网服务）。
+  static const String lanBaseUrl = 'http://39.162.50.99:8081';
 
   static const String _loopbackBaseUrl = 'http://127.0.0.1:8081';
 
diff --git a/test/config/server_endpoint_test.dart b/test/config/server_endpoint_test.dart
index 7d97b77..aa80ea9 100644
--- a/test/config/server_endpoint_test.dart
+++ b/test/config/server_endpoint_test.dart
@@ -57,13 +57,13 @@ void main() {
   });
 
   test('should_use_the_configured_lan_address_for_device_default', () {
-    expect(AppConfig.devHostBaseUrl, 'http://192.168.31.187:8081');
+    expect(AppConfig.devHostBaseUrl, 'http://39.162.50.99:8081');
   });
 
   test('should_apply_stored_url_only_when_debug_is_enabled', () async {
     SharedPreferencesAsyncPlatform.instance =
         InMemorySharedPreferencesAsync.withData({
-          ServerEndpoint.preferenceKey: ' http://192.168.31.187:8081/ ',
+          ServerEndpoint.preferenceKey: ' http://39.162.50.99:8081/ ',
         });
     final original = AppConfig.apiBaseUrl;
 
@@ -71,7 +71,7 @@ void main() {
     expect(AppConfig.apiBaseUrl, original);
 
     await ServerEndpoint.load(debug: true);
-    expect(AppConfig.apiBaseUrl, 'http://192.168.31.187:8081');
+    expect(AppConfig.apiBaseUrl, 'http://39.162.50.99:8081');
   });
 
   test('should_save_normalized_url_and_clear_override', () async {
@@ -81,10 +81,10 @@ void main() {
       isNull,
     );
 
-    expect(await ServerEndpoint.save(' http://192.168.31.187:8081/ '), isTrue);
+    expect(await ServerEndpoint.save(' http://39.162.50.99:8081/ '), isTrue);
     expect(
       await SharedPreferencesAsync().getString(ServerEndpoint.preferenceKey),
-      'http://192.168.31.187:8081',
+      'http://39.162.50.99:8081',
     );
 
     await ServerEndpoint.clear();