diff --git a/chatclient/App.xaml b/chatclient/App.xaml
index 43f4d3c..6fba763 100644
--- a/chatclient/App.xaml
+++ b/chatclient/App.xaml
@@ -4,7 +4,7 @@
             xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
             xmlns:local="clr-namespace:chatclient"
             StartupUri="MainWindow.xaml">
-   <Application.Resources>
+    <Application.Resources>
         <ResourceDictionary>
             <ResourceDictionary.MergedDictionaries>
                 <materialDesign:BundledTheme BaseTheme="Light" PrimaryColor="DeepPurple" SecondaryColor="Lime" />
@@ -14,6 +14,17 @@
                 <ResourceDictionary Source="pack://application:,,,/MaterialDesignColors;component/Themes/Recommended/Primary/MaterialDesignColor.DeepPurple.xaml" />
                 <ResourceDictionary Source="pack://application:,,,/chatclient;component/Data/MaterialTrayMenuItem.xaml" />
             </ResourceDictionary.MergedDictionaries>
+            <!-- Material Design 字体覆盖 -->
+            <FontFamily x:Key="MaterialDesignFont">pack://application:,,,/chatclient;component/Fonts/HarmonyOS_Sans_Semibold.ttf#HarmonyOS Sans SC</FontFamily>
+            <!-- 添加 HarmonyOS Sans 字体资源 -->
+            <FontFamily x:Key="HarmonyOSSans">pack://application:,,,/chatclient;component/Fonts/HarmonyOS_Sans_Semibold.ttf#HarmonyOS Sans SC</FontFamily>
+            <!-- 设置全局字体 -->
+            <Style TargetType="TextElement">
+                <Setter Property="FontFamily" Value="{StaticResource HarmonyOSSans}" />
+            </Style>
+            <Style TargetType="Control">
+                <Setter Property="FontFamily" Value="{StaticResource HarmonyOSSans}" />
+            </Style>
         </ResourceDictionary>
     </Application.Resources>
 </Application>
diff --git a/chatclient/resource/HarmonyOS Sans/HarmonyOS_Sans/.DS_Store b/chatclient/resource/Font/HarmonyOS_Sans/.DS_Store
similarity index 100%
rename from chatclient/resource/HarmonyOS Sans/HarmonyOS_Sans/.DS_Store
rename to chatclient/resource/Font/HarmonyOS_Sans/.DS_Store
diff --git a/chatclient/resource/HarmonyOS Sans/HarmonyOS_Sans/HarmonyOS_Sans_Black.ttf b/chatclient/resource/Font/HarmonyOS_Sans/HarmonyOS_Sans_Black.ttf
similarity index 100%
rename from chatclient/resource/HarmonyOS Sans/HarmonyOS_Sans/HarmonyOS_Sans_Black.ttf
rename to chatclient/resource/Font/HarmonyOS_Sans/HarmonyOS_Sans_Black.ttf
diff --git a/chatclient/resource/HarmonyOS Sans/HarmonyOS_Sans/HarmonyOS_Sans_Bold.ttf b/chatclient/resource/Font/HarmonyOS_Sans/HarmonyOS_Sans_Bold.ttf
similarity index 100%
rename from chatclient/resource/HarmonyOS Sans/HarmonyOS_Sans/HarmonyOS_Sans_Bold.ttf
rename to chatclient/resource/Font/HarmonyOS_Sans/HarmonyOS_Sans_Bold.ttf
diff --git a/chatclient/resource/HarmonyOS Sans/HarmonyOS_Sans/HarmonyOS_Sans_Light.ttf b/chatclient/resource/Font/HarmonyOS_Sans/HarmonyOS_Sans_Light.ttf
similarity index 100%
rename from chatclient/resource/HarmonyOS Sans/HarmonyOS_Sans/HarmonyOS_Sans_Light.ttf
rename to chatclient/resource/Font/HarmonyOS_Sans/HarmonyOS_Sans_Light.ttf
diff --git a/chatclient/resource/HarmonyOS Sans/HarmonyOS_Sans/HarmonyOS_Sans_Medium.ttf b/chatclient/resource/Font/HarmonyOS_Sans/HarmonyOS_Sans_Medium.ttf
similarity index 100%
rename from chatclient/resource/HarmonyOS Sans/HarmonyOS_Sans/HarmonyOS_Sans_Medium.ttf
rename to chatclient/resource/Font/HarmonyOS_Sans/HarmonyOS_Sans_Medium.ttf
diff --git a/chatclient/resource/HarmonyOS Sans/HarmonyOS_Sans/HarmonyOS_Sans_Regular.ttf b/chatclient/resource/Font/HarmonyOS_Sans/HarmonyOS_Sans_Regular.ttf
similarity index 100%
rename from chatclient/resource/HarmonyOS Sans/HarmonyOS_Sans/HarmonyOS_Sans_Regular.ttf
rename to chatclient/resource/Font/HarmonyOS_Sans/HarmonyOS_Sans_Regular.ttf
diff --git a/chatclient/resource/HarmonyOS Sans/HarmonyOS_Sans/HarmonyOS_Sans_Semibold.ttf b/chatclient/resource/Font/HarmonyOS_Sans/HarmonyOS_Sans_Semibold.ttf
similarity index 100%
rename from chatclient/resource/HarmonyOS Sans/HarmonyOS_Sans/HarmonyOS_Sans_Semibold.ttf
rename to chatclient/resource/Font/HarmonyOS_Sans/HarmonyOS_Sans_Semibold.ttf
diff --git a/chatclient/resource/HarmonyOS Sans/HarmonyOS_Sans/HarmonyOS_Sans_Thin.ttf b/chatclient/resource/Font/HarmonyOS_Sans/HarmonyOS_Sans_Thin.ttf
similarity index 100%
rename from chatclient/resource/HarmonyOS Sans/HarmonyOS_Sans/HarmonyOS_Sans_Thin.ttf
rename to chatclient/resource/Font/HarmonyOS_Sans/HarmonyOS_Sans_Thin.ttf
diff --git a/chatclient/resource/HarmonyOS Sans/.DS_Store b/chatclient/resource/HarmonyOS Sans/.DS_Store
deleted file mode 100644
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diff --git a/chatclient/resource/HarmonyOS Sans/HarmonyOS Naskh Arabic UI/.DS_Store b/chatclient/resource/HarmonyOS Sans/HarmonyOS Naskh Arabic UI/.DS_Store
deleted file mode 100644
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deleted file mode 100644
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deleted file mode 100644
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deleted file mode 100644
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deleted file mode 100644
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deleted file mode 100644
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deleted file mode 100644
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deleted file mode 100644
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