更新

FootwearTest/Views/MainWindow.axaml

@@ -17,7 +17,22 @@
                  Background="#EEF2F5"
                  TransparencyLevelHint="None"
                  BackgroundAnimationEnabled="False"
-                 ShowTitlebarBackground="True">
+                 BackgroundTransitionsEnabled="False"
+                 ShowTitlebarBackground="True"
+                 TitleBarAnimationEnabled="False"
+                 TitleBarVisibilityOnFullScreen="Visible">
+
+    <suki:SukiWindow.Styles>
+        <Style Selector="suki|GlassCard#PART_TitleBarBackground">
+            <Setter Property="IsOpaque" Value="True"/>
+        </Style>
+        <Style Selector="suki|GlassCard#PART_TitleBarBackground /template/ Border.GlassCardBorderPartCard">
+            <Setter Property="Background" Value="#FDFEFF"/>
+        </Style>
+        <Style Selector="Border#DragArea">
+            <Setter Property="Background" Value="#FDFEFF"/>
+        </Style>
+    </suki:SukiWindow.Styles>
 
     <Grid Background="#EEF2F5" ColumnDefinitions="236,*">
         <Border Grid.Column="0" Background="#17212B">

FootwearTest/Views/MainWindow.axaml.cs

@@ -1,3 +1,6 @@
+using Avalonia.Controls;
+using Avalonia.Controls.Primitives;
+using Avalonia.Media;
 using SukiUI.Controls;
 
 namespace FootwearTest.Views
@@ -8,5 +11,24 @@ namespace FootwearTest.Views
         {
             InitializeComponent();
         }
+
+        protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
+        {
+            base.OnApplyTemplate(e);
+
+            var titleBarBackground = e.NameScope.Find<GlassCard>("PART_TitleBarBackground");
+            if (titleBarBackground is not null)
+            {
+                titleBarBackground.IsOpaque = true;
+                titleBarBackground.IsAnimated = false;
+                titleBarBackground.BorderThickness = new Avalonia.Thickness(0);
+            }
+
+            var dragArea = e.NameScope.Find<Border>("DragArea");
+            if (dragArea is not null)
+            {
+                dragArea.Background = SolidColorBrush.Parse("#FDFEFF");
+            }
+        }
     }
 }