diff --git a/programs/hyprland.nix b/programs/hyprland.nix
index 3b2a004..fea9109 100644
--- a/programs/hyprland.nix
+++ b/programs/hyprland.nix
@@ -1,5 +1,8 @@
 { pkgs, ... }:
 
+let
+  mainMod = "SUPER";
+in
 {
   # 启用 Noctalia
   programs.noctalia-shell = {
@@ -16,9 +19,6 @@
     enable = true;
     configType = "lua";
     settings = {
-      # ── 基础变量 ──────────────────────────────────────────
-      "$mainMod" = "SUPER";
-
       # ── 基础设置 ──────────────────────────────────────────
       monitor = ",preferred,auto,1";
 
@@ -78,56 +78,56 @@
 
       # ── 快捷键 (Keybindings) ──────────────────────────────
       bind = [
-        "$mainMod, Return, exec, ghostty"
-        "$mainMod, Q, killactive,"
-        "$mainMod, B, exec, google-chrome"
-        "$mainMod, M, exit,"
-        "$mainMod, E, exec, dolphin"
-        "$mainMod, V, togglefloating,"
+        "${mainMod}, Return, exec, ghostty"
+        "${mainMod}, Q, killactive,"
+        "${mainMod}, B, exec, google-chrome"
+        "${mainMod}, M, exit,"
+        "${mainMod}, E, exec, dolphin"
+        "${mainMod}, V, togglefloating,"
         
         # 使用 Noctalia 的快捷键
-        "$mainMod, R, exec, noctalia-shell ipc call launcher toggle"
-        "$mainMod, N, exec, noctalia-shell ipc call notifications toggle"
-        "$mainMod, D, exec, noctalia-shell ipc call dashboard toggle"
+        "${mainMod}, R, exec, noctalia-shell ipc call launcher toggle"
+        "${mainMod}, N, exec, noctalia-shell ipc call notifications toggle"
+        "${mainMod}, D, exec, noctalia-shell ipc call dashboard toggle"
 
         # 聚焦移动
-        "$mainMod, left, movefocus, l"
-        "$mainMod, right, movefocus, r"
-        "$mainMod, up, movefocus, u"
-        "$mainMod, down, movefocus, d"
+        "${mainMod}, left, movefocus, l"
+        "${mainMod}, right, movefocus, r"
+        "${mainMod}, up, movefocus, u"
+        "${mainMod}, down, movefocus, d"
 
         # 工作区切换 (多桌面核心)
-        "$mainMod, 1, workspace, 1"
-        "$mainMod, 2, workspace, 2"
-        "$mainMod, 3, workspace, 3"
-        "$mainMod, 4, workspace, 4"
-        "$mainMod, 5, workspace, 5"
-        "$mainMod, 6, workspace, 6"
-        "$mainMod, 7, workspace, 7"
-        "$mainMod, 8, workspace, 8"
-        "$mainMod, 9, workspace, 9"
-        "$mainMod, 0, workspace, 10"
+        "${mainMod}, 1, workspace, 1"
+        "${mainMod}, 2, workspace, 2"
+        "${mainMod}, 3, workspace, 3"
+        "${mainMod}, 4, workspace, 4"
+        "${mainMod}, 5, workspace, 5"
+        "${mainMod}, 6, workspace, 6"
+        "${mainMod}, 7, workspace, 7"
+        "${mainMod}, 8, workspace, 8"
+        "${mainMod}, 9, workspace, 9"
+        "${mainMod}, 0, workspace, 10"
 
         # 移动窗口到工作区
-        "$mainMod SHIFT, 1, movetoworkspace, 1"
-        "$mainMod SHIFT, 2, movetoworkspace, 2"
-        "$mainMod SHIFT, 3, movetoworkspace, 3"
-        "$mainMod SHIFT, 4, movetoworkspace, 4"
-        "$mainMod SHIFT, 5, movetoworkspace, 5"
-        "$mainMod SHIFT, 6, movetoworkspace, 6"
-        "$mainMod SHIFT, 7, movetoworkspace, 7"
-        "$mainMod SHIFT, 8, movetoworkspace, 8"
-        "$mainMod SHIFT, 9, movetoworkspace, 9"
-        "$mainMod SHIFT, 0, movetoworkspace, 10"
+        "${mainMod} SHIFT, 1, movetoworkspace, 1"
+        "${mainMod} SHIFT, 2, movetoworkspace, 2"
+        "${mainMod} SHIFT, 3, movetoworkspace, 3"
+        "${mainMod} SHIFT, 4, movetoworkspace, 4"
+        "${mainMod} SHIFT, 5, movetoworkspace, 5"
+        "${mainMod} SHIFT, 6, movetoworkspace, 6"
+        "${mainMod} SHIFT, 7, movetoworkspace, 7"
+        "${mainMod} SHIFT, 8, movetoworkspace, 8"
+        "${mainMod} SHIFT, 9, movetoworkspace, 9"
+        "${mainMod} SHIFT, 0, movetoworkspace, 10"
 
         # 鼠标滚动切换工作区
-        "$mainMod, mouse_down, workspace, e+1"
-        "$mainMod, mouse_up, workspace, e-1"
+        "${mainMod}, mouse_down, workspace, e+1"
+        "${mainMod}, mouse_up, workspace, e-1"
       ];
 
       bindm = [
-        "$mainMod, mouse:272, movewindow"
-        "$mainMod, mouse:273, resizewindow"
+        "${mainMod}, mouse:272, movewindow"
+        "${mainMod}, mouse:273, resizewindow"
       ];
 
       # ── 启动项 ────────────────────────────────────────────