diff --git a/src/Semi.Avalonia/Index.axaml b/src/Semi.Avalonia/Index.axaml
index 334aa54..1f16c58 100644
--- a/src/Semi.Avalonia/Index.axaml
+++ b/src/Semi.Avalonia/Index.axaml
@@ -20,4 +20,6 @@
             </ResourceDictionary.MergedDictionaries>
         </ResourceDictionary>
     </Styles.Resources>
+
+    <StyleInclude Source="avares://Semi.Avalonia/Styles/_index.axaml" />
 </Styles>
\ No newline at end of file
diff --git a/src/Semi.Avalonia/SemiTheme.axaml b/src/Semi.Avalonia/SemiTheme.axaml
index eea19b2..cbf8643 100644
--- a/src/Semi.Avalonia/SemiTheme.axaml
+++ b/src/Semi.Avalonia/SemiTheme.axaml
@@ -21,4 +21,6 @@
             </ResourceDictionary.MergedDictionaries>
         </ResourceDictionary>
     </Styles.Resources>
+
+    <StyleInclude Source="avares://Semi.Avalonia/Styles/_index.axaml" />
 </Styles>
\ No newline at end of file
diff --git a/src/Semi.Avalonia/Styles/TabControl.axaml b/src/Semi.Avalonia/Styles/TabControl.axaml
new file mode 100644
index 0000000..eaa7bc6
--- /dev/null
+++ b/src/Semi.Avalonia/Styles/TabControl.axaml
@@ -0,0 +1,5 @@
+<Styles xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <Style Selector="TabControl TabItem:nth-last-child(1)">
+        <Setter Property="Margin" Value="0" />
+    </Style>
+</Styles>
\ No newline at end of file
diff --git a/src/Semi.Avalonia/Styles/_index.axaml b/src/Semi.Avalonia/Styles/_index.axaml
new file mode 100644
index 0000000..574fa22
--- /dev/null
+++ b/src/Semi.Avalonia/Styles/_index.axaml
@@ -0,0 +1,3 @@
+<Styles xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <StyleInclude Source="avares://Semi.Avalonia/Styles/TabControl.axaml" />
+</Styles>
\ No newline at end of file