diff --git a/client/lib/widgets/country_code.dart b/client/lib/widgets/country_code.dart
index 22aeb8b..9ec7871 100644
--- a/client/lib/widgets/country_code.dart
+++ b/client/lib/widgets/country_code.dart
@@ -1,7 +1,10 @@
-// country_code.dart — 国家码方块 + 信号条
+// country_code.dart — 节点地区图标(国旗,未知码回退码块) + 信号条
+import 'package:country_flags/country_flags.dart';
 import 'package:flutter/material.dart';
 import '../pangolin_theme.dart';
 
+/// 节点地区图标：有效 2 字母地区码渲染国旗(SVG,填满裁切,全平台含 Windows 都显示);
+/// 未知码(AUTO / ·· / 空等)回退为原 2 字母码块。选中态加 accent 边框环。
 class CountryCode extends StatelessWidget {
   const CountryCode({super.key, required this.code, this.active = false, this.size = 38});
   final String code;
@@ -11,21 +14,43 @@ class CountryCode extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final c = context.pangolin;
+    final radius = BorderRadius.circular(PangolinRadius.md);
+    final hasFlag = FlagCode.fromCountryCode(code.toUpperCase()) != null;
+
+    if (!hasFlag) {
+      // 回退：原码块样式(AUTO / 占位 / 非地区码)。
+      return Container(
+        width: size,
+        height: size,
+        alignment: Alignment.center,
+        decoration: BoxDecoration(
+          color: active ? c.accent : c.bgSubtle,
+          borderRadius: radius,
+        ),
+        child: Text(
+          code,
+          style: PangolinText.mono.copyWith(
+            fontSize: size * 0.31,
+            fontWeight: FontWeight.w600,
+            color: active ? PangolinColors.white : c.fg2,
+          ),
+        ),
+      );
+    }
+
+    // 国旗：外层 Container 控圆角 + 选中边框，内层 CountryFlag 以 BoxFit.cover 填满裁切。
     return Container(
       width: size,
       height: size,
-      alignment: Alignment.center,
+      clipBehavior: Clip.antiAlias,
       decoration: BoxDecoration(
-        color: active ? c.accent : c.bgSubtle,
-        borderRadius: BorderRadius.circular(PangolinRadius.md),
+        borderRadius: radius,
+        border: active ? Border.all(color: c.accent, width: 2) : null,
       ),
-      child: Text(
-        code,
-        style: PangolinText.mono.copyWith(
-          fontSize: size * 0.31,
-          fontWeight: FontWeight.w600,
-          color: active ? PangolinColors.white : c.fg2,
-        ),
+      child: CountryFlag.fromCountryCode(
+        code.toUpperCase(),
+        width: size,
+        height: size,
       ),
     );
   }
diff --git a/client/pubspec.yaml b/client/pubspec.yaml
index 05fed38..c1434d9 100644
--- a/client/pubspec.yaml
+++ b/client/pubspec.yaml
@@ -11,6 +11,7 @@ dependencies:
   flutter:
     sdk: flutter
   flutter_svg: ^2.0.10      # 加载 assets/ 下的矢量 logo
+  country_flags: ^3.1.0     # 节点国旗(SVG,全平台含 Windows;按 region 码渲染)
   lucide_icons: ^0.257.0    # Lucide 细线条图标
   google_fonts: ^6.2.1      # 运行时加载 Sora / Manrope / Noto Sans SC / JetBrains Mono
   flutter_riverpod: ^2.5.1  # 状态层(连接状态机 / 免费额度 / 节点选择 / 语言 / 主题)
diff --git a/client/test/golden/goldens/desktop_stats.png b/client/test/golden/goldens/desktop_stats.png
index d3a603b..eeeca88 100644
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diff --git a/client/test/golden/goldens/tablet_account.png b/client/test/golden/goldens/tablet_account.png
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diff --git a/client/test/golden/goldens/tablet_connect.png b/client/test/golden/goldens/tablet_connect.png
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diff --git a/client/test/golden/goldens/tablet_connect_dark.png b/client/test/golden/goldens/tablet_connect_dark.png
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