diff --git a/Flos_Gtk4/CMakeLists.txt b/Flos_Gtk4/CMakeLists.txt
index b48725c..7861999 100644
--- a/Flos_Gtk4/CMakeLists.txt
+++ b/Flos_Gtk4/CMakeLists.txt
@@ -27,6 +27,7 @@ set(RESOURCE_LIST
     flos.png
     menubar.xml
     style.css
+    style_dark.css
     reset.css
     dock.ui
     start.ui
@@ -35,6 +36,8 @@ set(RESOURCE_LIST
     folder.svg
     gnome-fs-regular.svg
     icons/16x16/actions/7zFM.png
+    icons/16x16/actions/arrow_left.svg
+    icons/16x16/actions/arrow_right.svg
     icons/48x48/actions/My_GtkUI.png
     icons/scalable/status/file-manager.svg
     icons/scalable/status/file-manager_running.svg
diff --git a/Flos_Gtk4/res/icons/16x16/actions/arrow_left.svg b/Flos_Gtk4/res/icons/16x16/actions/arrow_left.svg
new file mode 100644
index 0000000..0ce1af3
--- /dev/null
+++ b/Flos_Gtk4/res/icons/16x16/actions/arrow_left.svg
@@ -0,0 +1,13 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16">
+  <defs id="defs3051">
+    <style type="text/css" id="current-color-scheme">
+      .ColorScheme-Text {
+        color:#dedede;
+      }
+      </style>
+  </defs>
+ <path style="fill:currentColor;fill-opacity:1;stroke:none" 
+     d="m5 8l6.251-6 .749.719-4.298 4.125-1.237 1.156 1.237 1.156 4.298 4.125-.749.719-4.298-4.125z"
+     class="ColorScheme-Text"
+     />
+</svg>
diff --git a/Flos_Gtk4/res/icons/16x16/actions/arrow_right.svg b/Flos_Gtk4/res/icons/16x16/actions/arrow_right.svg
new file mode 100644
index 0000000..3f5d6b7
--- /dev/null
+++ b/Flos_Gtk4/res/icons/16x16/actions/arrow_right.svg
@@ -0,0 +1,13 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16">
+  <defs id="defs3051">
+    <style type="text/css" id="current-color-scheme">
+      .ColorScheme-Text {
+        color:#dedede;
+      }
+      </style>
+  </defs>
+ <path style="fill:currentColor;fill-opacity:1;stroke:none" 
+     d="m12 8l-6.251-6-.749.719 4.298 4.125 1.237 1.156-1.237 1.156-4.298 4.125.749.719 4.298-4.125z"
+     class="ColorScheme-Text"
+     />
+</svg>
diff --git a/Flos_Gtk4/res/start.ui b/Flos_Gtk4/res/start.ui
index decadb2..efcaaf4 100644
--- a/Flos_Gtk4/res/start.ui
+++ b/Flos_Gtk4/res/start.ui
@@ -210,7 +210,7 @@
                                   <object class="GtkImage">
                                     <property name="visible">1</property>
                                     <property name="pixel-size">16</property>
-                                    <property name="icon-name">arrow-right</property>
+                                    <property name="icon-name">arrow_right</property>
                                   </object>
                                 </child>
                                 <child>
@@ -476,7 +476,7 @@
                                     <object class="GtkImage">
                                       <property name="visible">1</property>
                                       <property name="pixel-size">16</property>
-                                      <property name="icon-name">arrow-left</property>
+                                      <property name="icon-name">arrow_left</property>
                                     </object>
                                   </child>
                                   <child>
diff --git a/Flos_Gtk4/res/style_dark.css b/Flos_Gtk4/res/style_dark.css
new file mode 100644
index 0000000..15e9d77
--- /dev/null
+++ b/Flos_Gtk4/res/style_dark.css
@@ -0,0 +1,28 @@
+/*
+您可以在这里输入任何 GTK 可识别的 CSS 规则。
+您可以点击上面的“暂停”按钮来暂时停用这个自定义 CSS。
+
+变更会立即应用到全局，影响整个应用程序。
+*/
+@import url("resource://org/gtk/daleclack/reset.css");
+
+/*Style for menubar*/
+menubar{
+	background-color: alpha(gray,0.7);
+}
+
+box{
+    background-color: alpha(gray,0.7);
+}
+
+separator{
+	background-color:rgb(59, 59, 59);
+}
+
+menubutton{
+    color:rgb(32, 32, 32);
+}
+
+button{
+	color:white;
+}
diff --git a/Flos_Gtk4/src/core/MainWin.cpp b/Flos_Gtk4/src/core/MainWin.cpp
index c883c95..568e6fd 100644
--- a/Flos_Gtk4/src/core/MainWin.cpp
+++ b/Flos_Gtk4/src/core/MainWin.cpp
@@ -86,7 +86,7 @@ static void main_win_init(MainWin *win)
 
     // Apply Style for menubar and the button
     win->provider = GTK_STYLE_PROVIDER(gtk_css_provider_new());
-    gtk_css_provider_load_from_resource(GTK_CSS_PROVIDER(win->provider), "/org/gtk/daleclack/style.css");
+    gtk_css_provider_load_from_resource(GTK_CSS_PROVIDER(win->provider), "/org/gtk/daleclack/style_dark.css");
     gtk_style_context_add_provider(gtk_widget_get_style_context(menubar), win->provider, G_MAXINT);
     gtk_style_context_add_provider(gtk_widget_get_style_context(home_button), win->provider, G_MAXINT);