diff --git a/src/components/sections/Header.tsx b/src/components/sections/Header.tsx
index e5ceef9..4fd24aa 100644
--- a/src/components/sections/Header.tsx
+++ b/src/components/sections/Header.tsx
@@ -6,6 +6,7 @@ import {
   Table2,
   Moon,
   Sun,
+  SunMoon,
   CircleUserIcon,
   Menu,
 } from "lucide-react";
@@ -18,23 +19,19 @@ import {
   DropdownMenu,
   DropdownMenuContent,
   DropdownMenuItem,
+  DropdownMenuSub,
+  DropdownMenuSubContent,
+  DropdownMenuSubTrigger,
   DropdownMenuTrigger,
 } from "@/components/ui/dropdown-menu";
 
 interface HeaderProps {
-  viewMode: "grid" | "table";
-  setViewMode: (mode: "grid" | "table") => void;
   searchTerm: string;
   setSearchTerm: (term: string) => void;
 }
 
-export const Header = ({
-  viewMode,
-  setViewMode,
-  searchTerm,
-  setSearchTerm,
-}: HeaderProps) => {
-  const { appearance, setAppearance } = useTheme();
+export const Header = ({ searchTerm, setSearchTerm }: HeaderProps) => {
+  const { rawAppearance, setAppearance, viewMode, setViewMode } = useTheme();
   const [isSearchOpen, setIsSearchOpen] = useState(false);
   const location = useLocation();
   const isInstancePage = location.pathname.startsWith("/instance");
@@ -52,10 +49,6 @@ export const Header = ({
     }
   }, [sitename]);
 
-  const toggleAppearance = () => {
-    setAppearance(appearance === "light" ? "dark" : "light");
-  };
-
   return (
     <header className="purcarte-blur border-b border-(--accent-a4) shadow-sm shadow-(color:--accent-a4) sticky top-0 flex items-center justify-center z-10">
       <div className="w-[90%] max-w-screen-2xl px-4 py-2 flex items-center justify-between">
@@ -128,16 +121,35 @@ export const Header = ({
                           {viewMode === "grid" ? "表格视图" : "网格视图"}
                         </span>
                       </DropdownMenuItem>
-                      <DropdownMenuItem onClick={toggleAppearance}>
-                        {appearance === "dark" ? (
-                          <Sun className="size-4 mr-2 text-primary" />
-                        ) : (
-                          <Moon className="size-4 mr-2 text-primary" />
-                        )}
-                        <span>
-                          {appearance === "dark" ? "浅色模式" : "深色模式"}
-                        </span>
-                      </DropdownMenuItem>
+                      <DropdownMenuSub>
+                        <DropdownMenuSubTrigger>
+                          {rawAppearance === "light" ? (
+                            <Sun className="size-4 mr-2 text-primary" />
+                          ) : rawAppearance === "dark" ? (
+                            <Moon className="size-4 mr-2 text-primary" />
+                          ) : (
+                            <SunMoon className="size-4 mr-2 text-primary" />
+                          )}
+                          <span>切换主题</span>
+                        </DropdownMenuSubTrigger>
+                        <DropdownMenuSubContent className="purcarte-blur border-(--accent-4)/50 rounded-xl">
+                          <DropdownMenuItem
+                            onClick={() => setAppearance("light")}>
+                            <Sun className="size-4 mr-2 text-primary" />
+                            <span>浅色模式</span>
+                          </DropdownMenuItem>
+                          <DropdownMenuItem
+                            onClick={() => setAppearance("dark")}>
+                            <Moon className="size-4 mr-2 text-primary" />
+                            <span>深色模式</span>
+                          </DropdownMenuItem>
+                          <DropdownMenuItem
+                            onClick={() => setAppearance("system")}>
+                            <SunMoon className="size-4 mr-2 text-primary" />
+                            <span>跟随系统</span>
+                          </DropdownMenuItem>
+                        </DropdownMenuSubContent>
+                      </DropdownMenuSub>
                       {enableAdminButton && (
                         <DropdownMenuItem asChild>
                           <a
@@ -195,16 +207,35 @@ export const Header = ({
                       <Grid3X3 className="size-5 text-primary" />
                     )}
                   </Button>
-                  <Button
-                    variant="ghost"
-                    size="icon"
-                    onClick={toggleAppearance}>
-                    {appearance === "dark" ? (
-                      <Sun className="size-5 text-primary" />
-                    ) : (
-                      <Moon className="size-5 text-primary" />
-                    )}
-                  </Button>
+                  <DropdownMenu modal={false}>
+                    <DropdownMenuTrigger asChild>
+                      <Button variant="ghost" size="icon">
+                        {rawAppearance === "light" ? (
+                          <Sun className="size-5 text-primary" />
+                        ) : rawAppearance === "dark" ? (
+                          <Moon className="size-5 text-primary" />
+                        ) : (
+                          <SunMoon className="size-5 text-primary" />
+                        )}
+                      </Button>
+                    </DropdownMenuTrigger>
+                    <DropdownMenuContent
+                      align="end"
+                      className="purcarte-blur mt-[.5rem] border-(--accent-4)/50 rounded-xl">
+                      <DropdownMenuItem onClick={() => setAppearance("light")}>
+                        <Sun className="size-4 mr-2 text-primary" />
+                        <span>浅色模式</span>
+                      </DropdownMenuItem>
+                      <DropdownMenuItem onClick={() => setAppearance("dark")}>
+                        <Moon className="size-4 mr-2 text-primary" />
+                        <span>深色模式</span>
+                      </DropdownMenuItem>
+                      <DropdownMenuItem onClick={() => setAppearance("system")}>
+                        <SunMoon className="size-4 mr-2 text-primary" />
+                        <span>跟随系统</span>
+                      </DropdownMenuItem>
+                    </DropdownMenuContent>
+                  </DropdownMenu>
                   {enableAdminButton && (
                     <a href="/admin" target="_blank" rel="noopener noreferrer">
                       <Button variant="ghost" size="icon">
@@ -232,16 +263,34 @@ export const Header = ({
                   <DropdownMenuContent
                     align="end"
                     className="animate-in slide-in-from-top-5 duration-300 purcarte-blur border-(--accent-4)/50 rounded-xl">
-                    <DropdownMenuItem onClick={toggleAppearance}>
-                      {appearance === "dark" ? (
-                        <Sun className="size-4 mr-2 text-primary" />
-                      ) : (
-                        <Moon className="size-4 mr-2 text-primary" />
-                      )}
-                      <span>
-                        {appearance === "dark" ? "浅色模式" : "深色模式"}
-                      </span>
-                    </DropdownMenuItem>
+                    <DropdownMenuSub>
+                      <DropdownMenuSubTrigger>
+                        {rawAppearance === "light" ? (
+                          <Sun className="size-4 mr-2 text-primary" />
+                        ) : rawAppearance === "dark" ? (
+                          <Moon className="size-4 mr-2 text-primary" />
+                        ) : (
+                          <SunMoon className="size-4 mr-2 text-primary" />
+                        )}
+                        <span>切换主题</span>
+                      </DropdownMenuSubTrigger>
+                      <DropdownMenuSubContent className="purcarte-blur border-(--accent-4)/50 rounded-xl">
+                        <DropdownMenuItem
+                          onClick={() => setAppearance("light")}>
+                          <Sun className="size-4 mr-2 text-primary" />
+                          <span>浅色模式</span>
+                        </DropdownMenuItem>
+                        <DropdownMenuItem onClick={() => setAppearance("dark")}>
+                          <Moon className="size-4 mr-2 text-primary" />
+                          <span>深色模式</span>
+                        </DropdownMenuItem>
+                        <DropdownMenuItem
+                          onClick={() => setAppearance("system")}>
+                          <SunMoon className="size-4 mr-2 text-primary" />
+                          <span>跟随系统</span>
+                        </DropdownMenuItem>
+                      </DropdownMenuSubContent>
+                    </DropdownMenuSub>
                     {enableAdminButton && (
                       <DropdownMenuItem asChild>
                         <a
@@ -258,16 +307,35 @@ export const Header = ({
                 </DropdownMenu>
               ) : (
                 <>
-                  <Button
-                    variant="ghost"
-                    size="icon"
-                    onClick={toggleAppearance}>
-                    {appearance === "dark" ? (
-                      <Sun className="size-5 text-primary" />
-                    ) : (
-                      <Moon className="size-5 text-primary" />
-                    )}
-                  </Button>
+                  <DropdownMenu modal={false}>
+                    <DropdownMenuTrigger asChild>
+                      <Button variant="ghost" size="icon">
+                        {rawAppearance === "light" ? (
+                          <Sun className="size-5 text-primary" />
+                        ) : rawAppearance === "dark" ? (
+                          <Moon className="size-5 text-primary" />
+                        ) : (
+                          <SunMoon className="size-5 text-primary" />
+                        )}
+                      </Button>
+                    </DropdownMenuTrigger>
+                    <DropdownMenuContent
+                      align="end"
+                      className="purcarte-blur mt-[.5rem] border-(--accent-4)/50 rounded-xl">
+                      <DropdownMenuItem onClick={() => setAppearance("light")}>
+                        <Sun className="size-4 mr-2 text-primary" />
+                        <span>浅色模式</span>
+                      </DropdownMenuItem>
+                      <DropdownMenuItem onClick={() => setAppearance("dark")}>
+                        <Moon className="size-4 mr-2 text-primary" />
+                        <span>深色模式</span>
+                      </DropdownMenuItem>
+                      <DropdownMenuItem onClick={() => setAppearance("system")}>
+                        <SunMoon className="size-4 mr-2 text-primary" />
+                        <span>跟随系统</span>
+                      </DropdownMenuItem>
+                    </DropdownMenuContent>
+                  </DropdownMenu>
                   {enableAdminButton && (
                     <a href="/admin" target="_blank" rel="noopener noreferrer">
                       <Button variant="ghost" size="icon">
diff --git a/src/components/ui/dropdown-menu.tsx b/src/components/ui/dropdown-menu.tsx
index bdb3aba..23c25a2 100644
--- a/src/components/ui/dropdown-menu.tsx
+++ b/src/components/ui/dropdown-menu.tsx
@@ -42,14 +42,18 @@ const DropdownMenuSubContent = React.forwardRef<
   React.ElementRef<typeof DropdownMenuPrimitive.SubContent>,
   React.ComponentPropsWithoutRef<typeof DropdownMenuPrimitive.SubContent>
 >(({ className, ...props }, ref) => (
-  <DropdownMenuPrimitive.SubContent
-    ref={ref}
-    className={cn(
-      "z-50 min-w-[8rem] purcarte-blur overflow-hidden theme-card-style bg-popover p-1 text-popover-foreground",
-      className
-    )}
-    {...props}
-  />
+  <DropdownMenuPrimitive.Portal>
+    <Theme>
+      <DropdownMenuPrimitive.SubContent
+        ref={ref}
+        className={cn(
+          "z-50 min-w-[8rem] purcarte-blur overflow-hidden theme-card-style bg-popover p-1 text-popover-foreground",
+          className
+        )}
+        {...props}
+      />
+    </Theme>
+  </DropdownMenuPrimitive.Portal>
 ));
 DropdownMenuSubContent.displayName =
   DropdownMenuPrimitive.SubContent.displayName;
diff --git a/src/hooks/useTheme.ts b/src/hooks/useTheme.ts
index 7b1447e..e64f1ac 100644
--- a/src/hooks/useTheme.ts
+++ b/src/hooks/useTheme.ts
@@ -1,5 +1,6 @@
-import { useState, useEffect, createContext } from "react";
+import { useState, useEffect, createContext, useContext } from "react";
 import { useConfigItem } from "@/config";
+import { DEFAULT_CONFIG } from "@/config/default";
 
 export const allowedColors = [
   "gray",
@@ -35,25 +36,24 @@ export type Colors = (typeof allowedColors)[number];
 export const allowedAppearances = ["light", "dark", "system"] as const;
 export type Appearance = (typeof allowedAppearances)[number];
 
-export const THEME_DEFAULTS = {
-  appearance: "system" as Appearance,
-  color: "gray" as Colors,
-} as const;
-
 export interface ThemeContextType {
   appearance: "light" | "dark";
   rawAppearance: Appearance;
   setAppearance: (appearance: Appearance) => void;
   color: Colors;
   setColor: (color: Colors) => void;
+  viewMode: "grid" | "table";
+  setViewMode: (mode: "grid" | "table") => void;
 }
 
 export const ThemeContext = createContext<ThemeContextType>({
   appearance: "light",
-  rawAppearance: THEME_DEFAULTS.appearance,
+  rawAppearance: DEFAULT_CONFIG.selectedDefaultAppearance as Appearance,
   setAppearance: () => {},
-  color: THEME_DEFAULTS.color,
+  color: DEFAULT_CONFIG.selectThemeColor as Colors,
   setColor: () => {},
+  viewMode: DEFAULT_CONFIG.selectedDefaultView as "grid" | "table",
+  setViewMode: () => {},
 });
 
 /**
@@ -98,48 +98,69 @@ export const useSystemTheme = (appearance: Appearance): "light" | "dark" => {
   return appearance as "light" | "dark";
 };
 
-import { useContext } from "react";
-
-export const useThemeManager = () => {
+const useStoredState = <T>(
+  key: string,
+  defaultValue: T,
+  validator?: (value: any) => value is T
+): [T, React.Dispatch<React.SetStateAction<T>>] => {
   const enableLocalStorage = useConfigItem("enableLocalStorage");
-  const defaultAppearance = useConfigItem("selectedDefaultAppearance");
-  const defaultColor = useConfigItem("selectThemeColor");
 
-  const [appearance, setAppearance] = useState<Appearance>(() => {
+  const [state, setState] = useState<T>(() => {
     if (enableLocalStorage) {
-      const storedAppearance = localStorage.getItem("appearance");
-      const cleanedAppearance = storedAppearance
-        ? storedAppearance.replace(/^"|"$/g, "")
-        : null;
-      if (allowedAppearances.includes(cleanedAppearance as Appearance)) {
-        return cleanedAppearance as Appearance;
+      const storedValue = localStorage.getItem(key);
+      if (storedValue) {
+        const cleanedValue = storedValue.replace(/^"|"$/g, "");
+        if (!validator || validator(cleanedValue)) {
+          return cleanedValue as T;
+        }
       }
     }
-    return (defaultAppearance as Appearance) || THEME_DEFAULTS.appearance;
+    return defaultValue;
   });
 
-  const [color, setColor] = useState<Colors>(
-    (defaultColor as Colors) || THEME_DEFAULTS.color
+  useEffect(() => {
+    if (enableLocalStorage) {
+      localStorage.setItem(key, String(state));
+    }
+  }, [key, state, enableLocalStorage]);
+
+  return [state, setState];
+};
+
+export const useThemeManager = () => {
+  const defaultAppearance = useConfigItem(
+    "selectedDefaultAppearance"
+  ) as Appearance;
+  const defaultColor = useConfigItem("selectThemeColor") as Colors;
+  const defaultView = useConfigItem("selectedDefaultView") as "grid" | "table";
+
+  const [appearance, setAppearance] = useStoredState<Appearance>(
+    "appearance",
+    defaultAppearance,
+    (v): v is Appearance => allowedAppearances.includes(v)
+  );
+
+  const [color, setColor] = useStoredState<Colors>("color", defaultColor);
+
+  const [viewMode, setViewMode] = useStoredState<"grid" | "table">(
+    "nodeViewMode",
+    defaultView
   );
 
   useEffect(() => {
-    setColor((defaultColor as Colors) || THEME_DEFAULTS.color);
-  }, [defaultColor]);
+    setColor(defaultColor);
+  }, [defaultColor, setColor]);
 
   const resolvedAppearance = useSystemTheme(appearance);
 
-  useEffect(() => {
-    if (enableLocalStorage) {
-      localStorage.setItem("appearance", appearance);
-    }
-  }, [appearance, enableLocalStorage]);
-
   return {
     appearance: resolvedAppearance,
     rawAppearance: appearance,
     setAppearance,
     color,
     setColor,
+    viewMode,
+    setViewMode,
   };
 };
 export const useTheme = () => {
diff --git a/src/main.tsx b/src/main.tsx
index 3e01dbd..d783c52 100644
--- a/src/main.tsx
+++ b/src/main.tsx
@@ -1,4 +1,4 @@
-import { StrictMode, useState, useEffect, lazy, Suspense } from "react";
+import { StrictMode, useState, lazy, Suspense } from "react";
 import { createRoot } from "react-dom/client";
 import { BrowserRouter as Router, Routes, Route } from "react-router-dom";
 import "./index.css";
@@ -23,29 +23,10 @@ import { useConfigItem } from "@/config";
 // 内部应用组件，在 ConfigProvider 内部使用配置
 export const AppContent = () => {
   const { appearance, color } = useTheme();
-  const defaultView = useConfigItem("selectedDefaultView");
-  const enableLocalStorage = useConfigItem("enableLocalStorage");
-
-  const [viewMode, setViewMode] = useState<"grid" | "table">(() => {
-    if (enableLocalStorage) {
-      const savedMode = localStorage.getItem("nodeViewMode");
-      const cleanedMode = savedMode ? savedMode.replace(/^"|"$/g, "") : null;
-      if (cleanedMode === "grid" || cleanedMode === "table") {
-        return cleanedMode;
-      }
-    }
-    return defaultView || "grid";
-  });
   const [searchTerm, setSearchTerm] = useState("");
   const enableVideoBackground = useConfigItem("enableVideoBackground");
   const videoBackgroundUrl = useConfigItem("videoBackgroundUrl");
 
-  useEffect(() => {
-    if (enableLocalStorage) {
-      localStorage.setItem("nodeViewMode", viewMode);
-    }
-  }, [enableLocalStorage, viewMode]);
-
   return (
     <>
       {enableVideoBackground && videoBackgroundUrl && (
@@ -63,19 +44,13 @@ export const AppContent = () => {
         scaling="110%"
         style={{ backgroundColor: "transparent" }}>
         <div className="min-h-screen flex flex-col text-sm">
-          <Header
-            viewMode={viewMode}
-            setViewMode={setViewMode}
-            searchTerm={searchTerm}
-            setSearchTerm={setSearchTerm}
-          />
+          <Header searchTerm={searchTerm} setSearchTerm={setSearchTerm} />
           <Suspense fallback={<Loading />}>
             <Routes>
               <Route
                 path="/"
                 element={
                   <HomePage
-                    viewMode={viewMode}
                     searchTerm={searchTerm}
                     setSearchTerm={setSearchTerm}
                   />
diff --git a/src/pages/Home.tsx b/src/pages/Home.tsx
index 6a34464..025aa5b 100644
--- a/src/pages/Home.tsx
+++ b/src/pages/Home.tsx
@@ -9,6 +9,7 @@ import type { NodeWithStatus } from "@/types/node";
 import { useNodeData } from "@/contexts/NodeDataContext";
 import { useLiveData } from "@/contexts/LiveDataContext";
 import { useAppConfig } from "@/config";
+import { useTheme } from "@/hooks/useTheme";
 import {
   Card,
   CardDescription,
@@ -18,7 +19,6 @@ import {
 } from "@/components/ui/card";
 
 interface HomePageProps {
-  viewMode: "grid" | "table";
   searchTerm: string;
   setSearchTerm: (term: string) => void;
 }
@@ -28,11 +28,8 @@ const homeStateCache = {
   scrollPosition: 0,
 };
 
-const HomePage: React.FC<HomePageProps> = ({
-  viewMode,
-  searchTerm,
-  setSearchTerm,
-}) => {
+const HomePage: React.FC<HomePageProps> = ({ searchTerm, setSearchTerm }) => {
+  const { viewMode } = useTheme();
   const { nodes: staticNodes, loading, getGroups } = useNodeData();
   const { liveData } = useLiveData();
   const [selectedGroup, setSelectedGroup] = useState(