diff --git a/HDMI-Tool/release/HDMI-Tool.exe b/HDMI-Tool/release/HDMI-Tool.exe
index 3d1e237..51cc213 100644
Binary files a/HDMI-Tool/release/HDMI-Tool.exe and b/HDMI-Tool/release/HDMI-Tool.exe differ
diff --git a/HDMI-Tool/src/app_gui.py b/HDMI-Tool/src/app_gui.py
index 92bc80f..5eaccf6 100644
--- a/HDMI-Tool/src/app_gui.py
+++ b/HDMI-Tool/src/app_gui.py
@@ -45,9 +45,18 @@ def get_icon_path():
     return p if os.path.exists(p) else None
 
 
+def _apply_dropdown_theme():
+    """CTk 默认下拉菜单是白底, 在深色界面里风格突兀; 改为随外观自适应的配色。
+    在创建任何控件前调用, 对全部 CTkComboBox/菜单生效。"""
+    ctk.ThemeManager.theme['DropdownMenu']['fg_color'] = ('#F2F2F2', '#2B2B2B')
+    ctk.ThemeManager.theme['DropdownMenu']['hover_color'] = ('#D8D8D8', '#3C3C3C')
+    ctk.ThemeManager.theme['DropdownMenu']['text_color'] = ('#1A1A1A', '#DADADA')
+
+
 def run_gui(auto_close=0):
     """入口: 配置外观并启动主窗口"""
     ctk.set_appearance_mode('Dark')
+    _apply_dropdown_theme()
     App(auto_close).mainloop()