add

frontend/asset_assistant/lib/pages/country_page.dart

@@ -271,10 +271,12 @@ class _CountryPageState extends State<CountryPage> {
   }
 
   Widget _buildBody(ThemeData theme) {
+    // 加载中且列表为空
     if (_isLoading && _countries.isEmpty) {
       return const Center(child: CircularProgressIndicator());
     }
 
+    // 有错误信息且列表为空
     if (_errorMessage != null && _countries.isEmpty) {
       return Center(
         child: Column(
@@ -294,6 +296,43 @@ class _CountryPageState extends State<CountryPage> {
       );
     }
 
+    // 无数据状态（列表为空且无错误）
+    if (_countries.isEmpty) {
+      return Center(
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: [
+            // 无数据背景图标
+            Icon(
+              Icons.flag_outlined,
+              size: 120,
+              color: theme.colorScheme.onSurface.withOpacity(0.1),
+            ),
+            const SizedBox(height: 24),
+            // 无数据提示文字
+            Text(
+              '暂无国家数据',
+              style: theme.textTheme.titleLarge?.copyWith(
+                color: theme.colorScheme.onSurface.withOpacity(0.5),
+              ),
+            ),
+            const SizedBox(height: 16),
+            // 刷新按钮
+            IconButton(
+              icon: Icon(
+                Icons.refresh,
+                size: 28,
+                color: theme.colorScheme.primary,
+              ),
+              onPressed: () => _fetchCountries(isRefresh: true),
+              tooltip: '刷新数据',
+            ),
+          ],
+        ),
+      );
+    }
+
+    // 正常列表展示
     return RefreshIndicator(
       onRefresh: _refresh,
       child: ListView.builder(