diff --git a/PCL2.Neo/App.axaml.cs b/PCL2.Neo/App.axaml.cs
index 355c112b..f6f5c083 100644
--- a/PCL2.Neo/App.axaml.cs
+++ b/PCL2.Neo/App.axaml.cs
@@ -1,14 +1,16 @@
-using System;
 using System.Linq;
 using Avalonia;
 using Avalonia.Controls.ApplicationLifetimes;
-using Avalonia.Data.Core;
 using Avalonia.Data.Core.Plugins;
 using Avalonia.Markup.Xaml;
-using PCL2.Neo.Helpers;
-using PCL2.Neo.Utils;
+using CommunityToolkit.Mvvm.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection;
+using PCL2.Neo.Services;
 using PCL2.Neo.ViewModels;
+using PCL2.Neo.ViewModels.Download;
+using PCL2.Neo.ViewModels.Home;
 using PCL2.Neo.Views;
+using System;
 
 namespace PCL2.Neo
 {
@@ -19,14 +21,33 @@ public override void Initialize()
             AvaloniaXamlLoader.Load(this);
         }
 
+        private static IServiceProvider ConfigureServices() => new ServiceCollection()
+            .AddTransient<MainWindowViewModel>()
+
+            .AddTransient<HomeViewModel>()
+            .AddTransient<HomeSubViewModel>()
+
+            .AddTransient<DownloadViewModel>()
+            .AddTransient<DownloadGameViewModel>()
+            .AddTransient<DownloadModViewModel>()
+
+            .AddSingleton<NavigationService>(s => new NavigationService(s))
+            .BuildServiceProvider();
+
         public override void OnFrameworkInitializationCompleted()
         {
+            Ioc.Default.ConfigureServices(ConfigureServices());
+
+            var vm = Ioc.Default.GetRequiredService<MainWindowViewModel>();
             if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
             {
                 // Avoid duplicate validations from both Avalonia and the CommunityToolkit.
                 // More info: https://docs.avaloniaui.net/docs/guides/development-guides/data-validation#manage-validationplugins
                 DisableAvaloniaDataAnnotationValidation();
-                desktop.MainWindow = new MainWindow();
+                desktop.MainWindow = new MainWindow
+                {
+                    DataContext = vm
+                };
             }
 
             base.OnFrameworkInitializationCompleted();
diff --git a/PCL2.Neo/Attributes.cs b/PCL2.Neo/Attributes.cs
new file mode 100644
index 00000000..852b2850
--- /dev/null
+++ b/PCL2.Neo/Attributes.cs
@@ -0,0 +1,15 @@
+using System;
+
+namespace PCL2.Neo;
+
+[AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct)]
+public class SubViewModelOfAttribute(Type parentViewModel) : Attribute
+{
+    public Type ParentViewModel { get; } = parentViewModel;
+}
+
+[AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct)]
+public class DefaultSubViewModelAttribute(Type subViewModel) : Attribute
+{
+    public Type SubViewModel { get; } = subViewModel;
+}
\ No newline at end of file
diff --git a/PCL2.Neo/PCL2.Neo.csproj b/PCL2.Neo/PCL2.Neo.csproj
index f8a87052..fb82ff64 100644
--- a/PCL2.Neo/PCL2.Neo.csproj
+++ b/PCL2.Neo/PCL2.Neo.csproj
@@ -35,8 +35,9 @@
       <PrivateAssets Condition="'$(Configuration)' != 'Debug'">All</PrivateAssets>
     </PackageReference>
     <PackageReference Include="Avalonia.Xaml.Behaviors" Version="11.2.7.1" />
-    <PackageReference Include="CommunityToolkit.Mvvm" Version="8.4.0" />
     <PackageReference Include="DotNet.Bundle" Version="0.9.13" />
+    <PackageReference Include="CommunityToolkit.Mvvm" Version="8.4.0" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="9.0.4" />
   </ItemGroup>
 
   <ItemGroup>
@@ -46,4 +47,22 @@
   <ItemGroup>
     <UpToDateCheckInput Remove="Controls\Style\ListBoxStyle.axaml" />
   </ItemGroup>
+
+  <ItemGroup>
+    <Compile Update="Views\HomeView.axaml.cs">
+      <DependentUpon>HomeLeftView.axaml</DependentUpon>
+    </Compile>
+    <Compile Update="Views\Home\HomeSubView.axaml.cs">
+      <DependentUpon>HomeRightView.axaml</DependentUpon>
+      <SubType>Code</SubType>
+    </Compile>
+    <Compile Update="Views\Download\DownloadGameView.axaml.cs">
+      <DependentUpon>DownloadRightView.axaml</DependentUpon>
+      <SubType>Code</SubType>
+    </Compile>
+    <Compile Update="Views\Download\DownloadModView.axaml.cs">
+      <DependentUpon>DownloadModView.axaml</DependentUpon>
+      <SubType>Code</SubType>
+    </Compile>
+  </ItemGroup>
 </Project>
diff --git a/PCL2.Neo/Services/NavigationService.cs b/PCL2.Neo/Services/NavigationService.cs
new file mode 100644
index 00000000..d68cc854
--- /dev/null
+++ b/PCL2.Neo/Services/NavigationService.cs
@@ -0,0 +1,83 @@
+using Microsoft.Extensions.DependencyInjection;
+using PCL2.Neo.ViewModels;
+using System;
+using System.Reflection;
+
+namespace PCL2.Neo.Services;
+
+public class NavigationService
+{
+    public IServiceProvider ServiceProvider { get; init; }
+
+    public event Action<ViewModelBase?>? CurrentViewModelChanged;
+    public event Action<ViewModelBase?>? CurrentSubViewModelChanged;
+
+    private ViewModelBase? _currentViewModel;
+    public ViewModelBase? CurrentViewModel
+    {
+        get => _currentViewModel;
+        protected set
+        {
+            if (value == _currentViewModel)
+                return;
+            _currentViewModel = value;
+            CurrentViewModelChanged?.Invoke(value);
+        }
+    }
+
+    private ViewModelBase? _currentSubViewModel;
+    public ViewModelBase? CurrentSubViewModel
+    {
+        get => _currentSubViewModel;
+        protected set
+        {
+            if (value == _currentSubViewModel)
+                return;
+            _currentSubViewModel = value;
+            CurrentSubViewModelChanged?.Invoke(value);
+        }
+    }
+
+    public NavigationService(IServiceProvider serviceProvider)
+    {
+        ServiceProvider = serviceProvider;
+    }
+
+    public virtual T Goto<T>() where T : ViewModelBase
+    {
+        if (typeof(T).GetCustomAttribute<DefaultSubViewModelAttribute>() is { } dsvm)
+        {
+            var vm = CurrentViewModel as T;
+            if (vm?.GetType() != typeof(T))
+            {
+                vm = ServiceProvider.GetRequiredService<T>();
+                CurrentViewModel = vm;
+            }
+            if (CurrentSubViewModel?.GetType() != dsvm.SubViewModel)
+                CurrentSubViewModel = ServiceProvider.GetRequiredService(dsvm.SubViewModel) as ViewModelBase;
+            return vm;
+        }
+
+        if (typeof(T).GetCustomAttribute<SubViewModelOfAttribute>() is { } svmo)
+        {
+            var subVm = CurrentSubViewModel as T;
+            if (CurrentViewModel?.GetType() != svmo.ParentViewModel)
+                CurrentViewModel = ServiceProvider.GetRequiredService(svmo.ParentViewModel) as ViewModelBase;
+            if (subVm?.GetType() != typeof(T))
+            {
+                subVm = ServiceProvider.GetRequiredService<T>();
+                CurrentSubViewModel = subVm;
+            }
+            return subVm;
+        }
+
+        var targetVm = CurrentViewModel?.GetType() != typeof(T) || CurrentSubViewModel?.GetType() != typeof(T)
+            ? ServiceProvider.GetRequiredService<T>()
+            : (T)CurrentViewModel;
+        if (CurrentViewModel?.GetType() != typeof(T))
+            CurrentViewModel = targetVm;
+        if (CurrentSubViewModel?.GetType() != typeof(T))
+            CurrentSubViewModel = targetVm;
+        return targetVm;
+    }
+}
\ No newline at end of file
diff --git a/PCL2.Neo/ViewLocator.cs b/PCL2.Neo/ViewLocator.cs
index 2fbc639e..9aecab0b 100644
--- a/PCL2.Neo/ViewLocator.cs
+++ b/PCL2.Neo/ViewLocator.cs
@@ -3,28 +3,28 @@
 using Avalonia.Controls.Templates;
 using PCL2.Neo.ViewModels;
 
-namespace PCL2.Neo
+namespace PCL2.Neo;
+
+public class ViewLocator : IDataTemplate
 {
-    public class ViewLocator : IDataTemplate
+    public Control? Build(object? param)
     {
-        public Control? Build(object? param)
-        {
-            if (param is null)
-                return null;
+        if (param is null)
+            return null;
 
-            var name = param.GetType().FullName!.Replace("ViewModel", "View", StringComparison.Ordinal);
-            var type = Type.GetType(name);
+        var name = param.GetType().FullName!.Replace("ViewModel", "View", StringComparison.Ordinal);
+        var type = Type.GetType(name);
 
-            if (type != null)
-            {
-                return (Control)Activator.CreateInstance(type)!;
-            }
-
-            return new TextBlock { Text = "Not Found: " + name };
-        }
-        public bool Match(object? data)
+        if (type != null)
         {
-            return data is ViewModelBase;
+            return (Control)Activator.CreateInstance(type)!;
         }
+
+        return new TextBlock { Text = "Not Found: " + name };
+    }
+
+    public bool Match(object? data)
+    {
+        return data is ViewModelBase;
     }
-}
+}
\ No newline at end of file
diff --git a/PCL2.Neo/ViewModels/Download/DownloadGameViewModel.cs b/PCL2.Neo/ViewModels/Download/DownloadGameViewModel.cs
new file mode 100644
index 00000000..90522970
--- /dev/null
+++ b/PCL2.Neo/ViewModels/Download/DownloadGameViewModel.cs
@@ -0,0 +1,7 @@
+namespace PCL2.Neo.ViewModels.Download;
+
+[SubViewModelOf(typeof(DownloadViewModel))]
+public class DownloadGameViewModel : ViewModelBase
+{
+
+}
\ No newline at end of file
diff --git a/PCL2.Neo/ViewModels/Download/DownloadModViewModel.cs b/PCL2.Neo/ViewModels/Download/DownloadModViewModel.cs
new file mode 100644
index 00000000..7f724923
--- /dev/null
+++ b/PCL2.Neo/ViewModels/Download/DownloadModViewModel.cs
@@ -0,0 +1,7 @@
+namespace PCL2.Neo.ViewModels.Download;
+
+[SubViewModelOf(typeof(DownloadViewModel))]
+public class DownloadModViewModel : ViewModelBase
+{
+
+}
\ No newline at end of file
diff --git a/PCL2.Neo/ViewModels/DownloadViewModel.cs b/PCL2.Neo/ViewModels/DownloadViewModel.cs
new file mode 100644
index 00000000..e687a306
--- /dev/null
+++ b/PCL2.Neo/ViewModels/DownloadViewModel.cs
@@ -0,0 +1,44 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using PCL2.Neo.Services;
+using PCL2.Neo.ViewModels.Download;
+
+namespace PCL2.Neo.ViewModels;
+
+[DefaultSubViewModel(typeof(DownloadGameViewModel))]
+public partial class DownloadViewModel : ViewModelBase
+{
+    public NavigationService NavigationService { get; }
+
+    [ObservableProperty]
+    private string _message = "I am from DownloadViewModel";
+
+    public DownloadViewModel(NavigationService navigationService)
+    {
+        NavigationService = navigationService;
+    }
+
+    [RelayCommand]
+    private void NavigateToDownloadGame()
+    {
+        this.NavigationService.Goto<DownloadGameViewModel>();
+    }
+
+    [RelayCommand]
+    private void NavigateToDownloadMod()
+    {
+        this.NavigationService.Goto<DownloadModViewModel>();
+    }
+
+    [RelayCommand]
+    private void Btn_Test1()
+    {
+        Message = "I am from DownloadViewModel Test1";
+    }
+
+    [RelayCommand]
+    private void Btn_Test2()
+    {
+        Message = "I am from DownloadViewModel Test2";
+    }
+}
\ No newline at end of file
diff --git a/PCL2.Neo/ViewModels/Home/HomeSubViewModel.cs b/PCL2.Neo/ViewModels/Home/HomeSubViewModel.cs
new file mode 100644
index 00000000..96d2c784
--- /dev/null
+++ b/PCL2.Neo/ViewModels/Home/HomeSubViewModel.cs
@@ -0,0 +1,22 @@
+using CommunityToolkit.Mvvm.Input;
+using PCL2.Neo.Services;
+using PCL2.Neo.ViewModels.Download;
+
+namespace PCL2.Neo.ViewModels.Home;
+
+[SubViewModelOf(typeof(HomeViewModel))]
+public partial class HomeSubViewModel : ViewModelBase
+{
+    public NavigationService NavigationService { get; }
+
+    public HomeSubViewModel(NavigationService navigationService)
+    {
+        this.NavigationService = navigationService;
+    }
+
+    [RelayCommand]
+    private void NavigateToDownloadMod()
+    {
+        this.NavigationService.Goto<DownloadModViewModel>();
+    }
+}
\ No newline at end of file
diff --git a/PCL2.Neo/ViewModels/HomeViewModel.cs b/PCL2.Neo/ViewModels/HomeViewModel.cs
new file mode 100644
index 00000000..2a2e23c0
--- /dev/null
+++ b/PCL2.Neo/ViewModels/HomeViewModel.cs
@@ -0,0 +1,9 @@
+using PCL2.Neo.ViewModels.Home;
+
+namespace PCL2.Neo.ViewModels;
+
+[DefaultSubViewModel(typeof(HomeSubViewModel))]
+public class HomeViewModel : ViewModelBase
+{
+
+}
\ No newline at end of file
diff --git a/PCL2.Neo/ViewModels/MainWindowViewModel.cs b/PCL2.Neo/ViewModels/MainWindowViewModel.cs
index 7b121870..f252a6d8 100644
--- a/PCL2.Neo/ViewModels/MainWindowViewModel.cs
+++ b/PCL2.Neo/ViewModels/MainWindowViewModel.cs
@@ -1,22 +1,74 @@
 using Avalonia.Controls;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
 using PCL2.Neo.Controls.MyMsg;
+using PCL2.Neo.Services;
 using PCL2.Neo.Helpers;
 using System.Threading.Tasks;
 
+
 namespace PCL2.Neo.ViewModels
 {
     public partial class MainWindowViewModel : ViewModelBase
     {
         private Window? _window;
+        public NavigationService NavigationService { get; }
+
+        // quite shitty, maybe consider using enum and converters
+        [ObservableProperty] private bool _isNavBtn1Checked = true;
+        [ObservableProperty] private bool _isNavBtn2Checked;
+        [ObservableProperty] private bool _isNavBtn3Checked;
+        [ObservableProperty] private bool _isNavBtn4Checked;
+        [ObservableProperty] private bool _isNavBtn5Checked;
+
+        [ObservableProperty]
+        private ViewModelBase? _currentViewModel;
+        [ObservableProperty]
+        private ViewModelBase? _currentSubViewModel;
 
         // 为了设计时的 DataContext
         public MainWindowViewModel()
         {
+            throw new System.NotImplementedException();
         }
         public MainWindowViewModel(Window window)
         {
             this._window = window;
         }
+        public MainWindowViewModel(NavigationService navigationService)
+        {
+            this.NavigationService = navigationService;
+            this.NavigationService.CurrentViewModelChanged += x =>
+            {
+                CurrentViewModel = x;
+                switch (x)
+                {
+                    case HomeViewModel:
+                        IsNavBtn1Checked = true;
+                        break;
+                    case DownloadViewModel:
+                        IsNavBtn2Checked = true;
+                        break;
+                }
+            };
+            this.NavigationService.CurrentSubViewModelChanged += x =>
+            {
+                CurrentSubViewModel = x;
+            };
+            this.NavigationService.Goto<HomeViewModel>();
+        }
+
+        [RelayCommand]
+        public void NavigateToHome()
+        {
+            this.NavigationService.Goto<HomeViewModel>();
+        }
+
+        [RelayCommand]
+        public void NavigateToDownload()
+        {
+            this.NavigationService.Goto<DownloadViewModel>();
+        }
 
         public void Close()
         {
@@ -29,7 +81,7 @@ public void Minimize()
             _window.WindowState = WindowState.Minimized;
         }
 
-        public void ShowMessageBox((MessageBoxParam, TaskCompletionSource<MessageBoxResult>) messageBoxParam)
+        public void ShowMessageBox(IMessageBox messageBox)
         {
 
         }
diff --git a/PCL2.Neo/ViewModels/ViewModelBase.cs b/PCL2.Neo/ViewModels/ViewModelBase.cs
index 5ef648a5..515c3506 100644
--- a/PCL2.Neo/ViewModels/ViewModelBase.cs
+++ b/PCL2.Neo/ViewModels/ViewModelBase.cs
@@ -1,9 +1,8 @@
 using CommunityToolkit.Mvvm.ComponentModel;
 
-namespace PCL2.Neo.ViewModels
+namespace PCL2.Neo.ViewModels;
+
+public partial class ViewModelBase : ObservableObject
 {
-    public class ViewModelBase : ObservableObject
-    {
 
-    }
-}
+}
\ No newline at end of file
diff --git a/PCL2.Neo/Views/Download/DownloadGameView.axaml b/PCL2.Neo/Views/Download/DownloadGameView.axaml
new file mode 100644
index 00000000..da02522c
--- /dev/null
+++ b/PCL2.Neo/Views/Download/DownloadGameView.axaml
@@ -0,0 +1,18 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:pc="using:PCL2.Neo.Controls"
+             xmlns:vm="using:PCL2.Neo.ViewModels"
+             xmlns:vmd="using:PCL2.Neo.ViewModels.Download"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+             x:Class="PCL2.Neo.Views.Download.DownloadGameView"
+             x:DataType="vmd:DownloadGameViewModel">
+    <Design.DataContext>
+        <vmd:DownloadGameViewModel />
+    </Design.DataContext>
+    <StackPanel>
+        <TextBlock Margin="10" Text="DownloadGameView"/>
+    </StackPanel>
+</UserControl>
+
diff --git a/PCL2.Neo/Views/Download/DownloadGameView.axaml.cs b/PCL2.Neo/Views/Download/DownloadGameView.axaml.cs
new file mode 100644
index 00000000..4c66f950
--- /dev/null
+++ b/PCL2.Neo/Views/Download/DownloadGameView.axaml.cs
@@ -0,0 +1,11 @@
+using Avalonia.Controls;
+
+namespace PCL2.Neo.Views.Download;
+
+public partial class DownloadGameView : UserControl
+{
+    public DownloadGameView()
+    {
+        InitializeComponent();
+    }
+}
\ No newline at end of file
diff --git a/PCL2.Neo/Views/Download/DownloadModView.axaml b/PCL2.Neo/Views/Download/DownloadModView.axaml
new file mode 100644
index 00000000..1afd2255
--- /dev/null
+++ b/PCL2.Neo/Views/Download/DownloadModView.axaml
@@ -0,0 +1,18 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:pc="using:PCL2.Neo.Controls"
+             xmlns:vm="using:PCL2.Neo.ViewModels"
+             xmlns:vmd="using:PCL2.Neo.ViewModels.Download"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+             x:Class="PCL2.Neo.Views.Download.DownloadModView"
+             x:DataType="vmd:DownloadModViewModel">
+    <Design.DataContext>
+        <vmd:DownloadModViewModel />
+    </Design.DataContext>
+    <StackPanel>
+        <TextBlock Margin="10" Text="DownloadModView"/>
+    </StackPanel>
+</UserControl>
+
diff --git a/PCL2.Neo/Views/Download/DownloadModView.axaml.cs b/PCL2.Neo/Views/Download/DownloadModView.axaml.cs
new file mode 100644
index 00000000..ae693946
--- /dev/null
+++ b/PCL2.Neo/Views/Download/DownloadModView.axaml.cs
@@ -0,0 +1,11 @@
+using Avalonia.Controls;
+
+namespace PCL2.Neo.Views.Download;
+
+public partial class DownloadModView : UserControl
+{
+    public DownloadModView()
+    {
+        InitializeComponent();
+    }
+}
\ No newline at end of file
diff --git a/PCL2.Neo/Views/DownloadView.axaml b/PCL2.Neo/Views/DownloadView.axaml
new file mode 100644
index 00000000..cef8a615
--- /dev/null
+++ b/PCL2.Neo/Views/DownloadView.axaml
@@ -0,0 +1,40 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:pc="using:PCL2.Neo.Controls"
+             xmlns:vm="using:PCL2.Neo.ViewModels"
+             mc:Ignorable="d" d:DesignWidth="150" d:DesignHeight="450"
+             x:Class="PCL2.Neo.Views.DownloadView"
+             x:DataType="vm:DownloadViewModel"
+             Width="170">
+    <StackPanel Orientation="Vertical">
+        <TextBlock Text="DownloadLeftView"/>
+        <TextBlock Text="{Binding Message}" TextWrapping="Wrap" />
+        <pc:MyButton
+            Text="Navigate to GameView"
+            ColorType="Highlight"
+            Height="50"
+            Margin="10"
+            Command="{Binding NavigateToDownloadGameCommand}"/>
+        <pc:MyButton
+            Text="Navigate to ModView"
+            ColorType="Highlight"
+            Height="50"
+            Margin="10"
+            Command="{Binding NavigateToDownloadModCommand}"/>
+        <pc:MyButton
+            Text="Test1"
+            ColorType="Highlight"
+            Height="50"
+            Margin="10"
+            Command="{Binding Btn_Test1Command}"/>
+        <pc:MyButton
+            Text="Test2"
+            ColorType="Highlight"
+            Height="50"
+            Margin="10"
+            Command="{Binding Btn_Test2Command}"/>
+    </StackPanel>
+</UserControl>
+
diff --git a/PCL2.Neo/Views/DownloadView.axaml.cs b/PCL2.Neo/Views/DownloadView.axaml.cs
new file mode 100644
index 00000000..b1eb0768
--- /dev/null
+++ b/PCL2.Neo/Views/DownloadView.axaml.cs
@@ -0,0 +1,14 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace PCL2.Neo.Views
+{
+    public partial class DownloadView : UserControl
+    {
+        public DownloadView()
+        {
+            InitializeComponent();
+        }
+    }
+}
\ No newline at end of file
diff --git a/PCL2.Neo/Views/Home/HomeSubView.axaml b/PCL2.Neo/Views/Home/HomeSubView.axaml
new file mode 100644
index 00000000..dbb67cc9
--- /dev/null
+++ b/PCL2.Neo/Views/Home/HomeSubView.axaml
@@ -0,0 +1,52 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:pc="using:PCL2.Neo.Controls"
+             xmlns:vm="using:PCL2.Neo.ViewModels"
+             xmlns:home="clr-namespace:PCL2.Neo.ViewModels.Home"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+             x:Class="PCL2.Neo.Views.Home.HomeSubView"
+             x:DataType="home:HomeSubViewModel">
+    <ScrollViewer>
+        <StackPanel Orientation="Vertical">
+            <pc:MyButton
+                ColorType="Normal"
+                Height="50"
+                Margin="10"
+                Text="普通按钮" />
+            <pc:MyButton
+                Click="Button_OnClick"
+                ColorType="Highlight"
+                Height="50"
+                Margin="10"
+                Text="高亮按钮" />
+            <pc:MyButton
+                Click="Button2_OnClick"
+                ColorType="Red"
+                Height="50"
+                Margin="10"
+                Text="红色按钮" />
+            <pc:MyButton Height="50" Margin="10">
+                <Run Text="PCL2.Neo 也支持了" />
+                <Run
+                    FontWeight="Bold"
+                    Foreground="#ff4c4c"
+                    Text="Inline 富文本！" />
+                <LineBreak />
+                <Run Text="为什么这里有个" />
+                <InlineUIContainer>
+                    <Image Source="avares://PCL2.Neo/Assets/Icon.ico" Width="20" />
+                </InlineUIContainer>
+                <Run Text="图标？" />
+            </pc:MyButton>
+            <pc:MyLoading
+                Height="150"
+                Name="TestLoading"
+                Width="150" />
+            <pc:MyButton Height="50" Margin="10" Text="跳转到 Download Mod" Command="{Binding NavigateToDownloadModCommand}" />
+            <pc:MyButton Height="50" Margin="10" Text="搜索 Java" Click="Search_Java_Button"/>
+            <pc:MyCard Margin="10" />
+        </StackPanel>
+    </ScrollViewer>
+</UserControl>
diff --git a/PCL2.Neo/Views/Home/HomeSubView.axaml.cs b/PCL2.Neo/Views/Home/HomeSubView.axaml.cs
new file mode 100644
index 00000000..e48a6a4f
--- /dev/null
+++ b/PCL2.Neo/Views/Home/HomeSubView.axaml.cs
@@ -0,0 +1,57 @@
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using PCL2.Neo.Controls;
+using PCL2.Neo.Models.Minecraft.Java;
+using System;
+using System.Linq;
+
+namespace PCL2.Neo.Views.Home;
+
+public partial class HomeSubView : UserControl
+{
+    public HomeSubView()
+    {
+        InitializeComponent();
+    }
+
+    private void Button_OnClick(object? sender, RoutedEventArgs e)
+    {
+        this.TestLoading.State = MyLoading.LoadingState.Loading;
+    }
+
+    private void Button2_OnClick(object? sender, RoutedEventArgs e)
+    {
+        this.TestLoading.State = MyLoading.LoadingState.Error;
+    }
+
+    private async void Search_Java_Button(object? sender, RoutedEventArgs e)
+    {
+        try
+        {
+            var javas = await Java.SearchJava();
+            Console.WriteLine($"找到 {javas.Count()} 个Java环境:");
+
+            foreach (var java in javas)
+            {
+                try
+                {
+                    Console.WriteLine("----------------------");
+                    Console.WriteLine($"路径: {java.DirectoryPath}");
+                    var version = java.Version;
+                    Console.WriteLine($"版本: Java {version}");
+                    Console.WriteLine($"位数: {(java.Is64Bit ? "64位" : "32位")}");
+                    Console.WriteLine($"类型: {(java.IsJre ? "JRE" : "JDK")}");
+                    Console.WriteLine($"可用: {java.Compability}");
+                }
+                catch (Exception ex)
+                {
+                    Console.WriteLine($"处理Java信息时出错: {ex.Message}");
+                }
+            }
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine($"搜索失败: {ex.Message}");
+        }
+    }
+}
\ No newline at end of file
diff --git a/PCL2.Neo/Views/HomeView.axaml b/PCL2.Neo/Views/HomeView.axaml
new file mode 100644
index 00000000..ba939041
--- /dev/null
+++ b/PCL2.Neo/Views/HomeView.axaml
@@ -0,0 +1,13 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:vm="using:PCL2.Neo.ViewModels"
+             xmlns:home="clr-namespace:PCL2.Neo.ViewModels.Home"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="250"
+             x:Class="PCL2.Neo.Views.HomeView"
+             x:DataType="home:HomeSubViewModel"
+             Width="250">
+    Welcome to Avalonia!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+</UserControl>
+
diff --git a/PCL2.Neo/Views/HomeView.axaml.cs b/PCL2.Neo/Views/HomeView.axaml.cs
new file mode 100644
index 00000000..d5c929cf
--- /dev/null
+++ b/PCL2.Neo/Views/HomeView.axaml.cs
@@ -0,0 +1,14 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace PCL2.Neo.Views
+{
+    public partial class HomeView : UserControl
+    {
+        public HomeView()
+        {
+            InitializeComponent();
+        }
+    }
+}
\ No newline at end of file
diff --git a/PCL2.Neo/Views/MainWindow.axaml b/PCL2.Neo/Views/MainWindow.axaml
index 7bd1abe6..7bfaa599 100644
--- a/PCL2.Neo/Views/MainWindow.axaml
+++ b/PCL2.Neo/Views/MainWindow.axaml
@@ -17,7 +17,8 @@
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
     xmlns:pc="using:PCL2.Neo.Controls"
-    xmlns:vm="clr-namespace:PCL2.Neo.ViewModels"
+    xmlns:vm="using:PCL2.Neo.ViewModels"
+    xmlns:local="using:PCL2.Neo"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
     <Grid Name="GridRoot">
         <Border
@@ -41,7 +42,7 @@
                         Margin="19,0"
                         Orientation="Horizontal"
                         VerticalAlignment="Center"
-                        ZIndex="1">
+                        ZIndex="3">
                         <Path
                             Data="{StaticResource ShapeTitleLogo}"
                             Height="16"
@@ -116,7 +117,7 @@
                         Margin="0,0,12,0"
                         Orientation="Horizontal"
                         VerticalAlignment="Center"
-                        ZIndex="1">
+                        ZIndex="3">
                         <pc:MyIconButton
                             Height="28"
                             HorizontalAlignment="Right"
@@ -145,6 +146,7 @@
                         Background="{DynamicResource ColorBrush3}"
                         Grid.Row="0"
                         Height="48"
+                        ZIndex="2"
                         Name="NavBackgroundBorder">
                         <StackPanel
                             Height="27"
@@ -153,23 +155,27 @@
                             Orientation="Horizontal"
                             VerticalAlignment="Center">
                             <pc:MyRadioButton
-                                IsChecked="True"
+                                IsChecked="{Binding IsNavBtn1Checked}"
                                 Logo="{StaticResource BtnTitleSelect0}"
                                 LogoScale="0.95"
                                 Margin="5,0"
                                 Name="BtnTitleSelect0"
                                 Padding="2,0"
                                 Tag="0"
-                                Text="{DynamicResource LangTitleHome}" />
+                                Text="{DynamicResource LangTitleHome}"
+                                Command="{Binding NavigateToHome}" />
                             <pc:MyRadioButton
+                                IsChecked="{Binding IsNavBtn2Checked}"
                                 Logo="{DynamicResource BtnTitleSelect1}"
                                 LogoScale="0.9"
                                 Margin="5,0"
                                 Name="BtnTitleSelect1"
                                 Padding="2,0"
                                 Tag="1"
-                                Text="{DynamicResource LangTitleDownload}" />
+                                Text="{DynamicResource LangTitleDownload}"
+                                Command="{Binding NavigateToDownload}" />
                             <pc:MyRadioButton
+                                IsChecked="{Binding IsNavBtn3Checked}"
                                 Logo="{StaticResource BtnTitleSelect2}"
                                 LogoScale="1.05"
                                 Margin="5,0"
@@ -178,6 +184,7 @@
                                 Tag="2"
                                 Text="{DynamicResource LangTitleLink}" />
                             <pc:MyRadioButton
+                                IsChecked="{Binding IsNavBtn4Checked}"
                                 Logo="{DynamicResource BtnTitleSelect3}"
                                 LogoScale="1.1"
                                 Margin="5,0"
@@ -186,6 +193,7 @@
                                 Tag="3"
                                 Text="{DynamicResource LangTitleSetup}" />
                             <pc:MyRadioButton
+                                IsChecked="{Binding IsNavBtn5Checked}"
                                 Logo="{StaticResource BtnTitleSelect4}"
                                 LogoScale="0.93"
                                 Margin="5,0"
@@ -196,55 +204,21 @@
                         </StackPanel>
                     </Border>
 
-                    <Grid Grid.Row="1" Name="PanMain">
-                        <ScrollViewer>
-                            <StackPanel Orientation="Vertical">
-                                <pc:MyButton
-                                    ColorType="Normal"
-                                    Height="50"
-                                    Margin="10"
-                                    Text="普通按钮" />
-                                <pc:MyButton
-                                    Click="Button_OnClick"
-                                    ColorType="Highlight"
-                                    Height="50"
-                                    Margin="10"
-                                    Text="高亮按钮" />
-                                <pc:MyButton
-                                    Click="Button2_OnClick"
-                                    ColorType="Red"
-                                    Height="50"
-                                    Margin="10"
-                                    Text="红色按钮" />
-                                <pc:MyButton Height="50" Margin="10">
-                                    <Run Text="PCL2.Neo 也支持了" />
-                                    <Run
-                                        FontWeight="Bold"
-                                        Foreground="#ff4c4c"
-                                        Text="Inline 富文本！" />
-                                    <LineBreak />
-                                    <Run Text="为什么这里有个" />
-                                    <InlineUIContainer>
-                                        <Image Source="avares://PCL2.Neo/Assets/Icon.ico" Width="20" />
-                                    </InlineUIContainer>
-                                    <Run Text="图标？" />
-                                </pc:MyButton>
-                                <pc:MyLoading
-                                    Height="150"
-                                    Name="TestLoading"
-                                    Width="150" />
-                                <pc:MyButton Height="50" Margin="10" />
-                                <pc:MyButton
-                                    Click="Search_Java_Button"
-                                    Height="50"
-                                    Margin="10"
-                                    Text="搜索 Java" />
-                                <Border Background="White" Height="50">
-                                    <TextBlock FontSize="20" Text="测试阴影" />
-                                </Border>
-                                <pc:MyCard Margin="10,0,10,10" ZIndex="2" />
-                            </StackPanel>
-                        </ScrollViewer>
+                    <Grid Grid.Row="1" Name="PanMain"
+                          ColumnDefinitions="Auto, *">
+                        <!-- Width overridden in code behind -->
+                        <Border Grid.Column="0" Name="LeftNavigationControlBorder"
+                                RenderTransformOrigin="0 0"
+                                Background="WhiteSmoke"
+                                Width="250"
+                                ZIndex="1"
+                                BoxShadow="0 0 15 0 DarkGray" />
+                        <UserControl Grid.Column="0" Name="LeftNavigationControl"
+                                     Content="{Binding CurrentViewModel}"
+                                     ZIndex="2" />
+                        <UserControl Grid.Column="1" Name="RightNavigationControl"
+                                     ZIndex="0"
+                                     Content="{Binding CurrentSubViewModel}" />
                     </Grid>
 
                     <Grid
@@ -253,7 +227,7 @@
                         Grid.RowSpan="2"
                         IsVisible="False"
                         Name="PanMsg"
-                        ZIndex="2" />
+                        ZIndex="10" />
                 </Grid>
             </Border>
         </Border>
diff --git a/PCL2.Neo/Views/MainWindow.axaml.cs b/PCL2.Neo/Views/MainWindow.axaml.cs
index 965c1715..8704f8a1 100644
--- a/PCL2.Neo/Views/MainWindow.axaml.cs
+++ b/PCL2.Neo/Views/MainWindow.axaml.cs
@@ -1,6 +1,7 @@
 using Avalonia;
 using Avalonia.Animation.Easings;
 using Avalonia.Controls;
+using Avalonia.Controls.Presenters;
 using Avalonia.Input;
 using Avalonia.Interactivity;
 using Avalonia.Media;
@@ -10,12 +11,12 @@
 using PCL2.Neo.Animations.Easings;
 using PCL2.Neo.Controls;
 using PCL2.Neo.Helpers;
-using PCL2.Neo.Models.Minecraft.Java;
 using System;
 using System.Linq;
 using System.Numerics;
 using System.Runtime.InteropServices;
 using System.Threading.Tasks;
+using CubicEaseOut = Avalonia.Animation.Easings.CubicEaseOut;
 
 namespace PCL2.Neo.Views;
 
@@ -55,14 +56,37 @@ public MainWindow()
 
         BtnTitleMin.Click += (_, _) => WindowState = WindowState.Minimized;
 
-        GridRoot.Opacity = 0; // 在此处初始化透明度，不然将闪现
-        this.Loaded += (_, _) => AnimationIn();
-    }
-    private void OnNavPointerPressed(object? sender, PointerPressedEventArgs e)
-    {
+        LeftNavigationControl.Loaded += (_, _) =>
+        {
+            LeftNavigationControlBorder.Width = LeftNavigationControl.Presenter!.Child?.Width ?? 0d;
+            AnimationHelper? lastAnimation = null;
+            LeftNavigationControl.Presenter!.PropertyChanged += async (_, e) =>
+            {
+                if (e.Property != ContentPresenter.ChildProperty)
+                    return;
+                var oldValue = e.OldValue as Control;
+                var newValue = e.NewValue as Control;
+                lastAnimation?.CancelAndClear();
+                var previousScaleTransform =
+                    (LeftNavigationControlBorder.RenderTransform as TransformGroup)?.Children
+                    .FirstOrDefault(x => x is ScaleTransform) as ScaleTransform;
+                var previousScaleX = previousScaleTransform?.ScaleX ?? 1d;
+                LeftNavigationControlBorder.Width = LeftNavigationControl.Presenter!.Child?.Width ?? 0d;
+                var scale = oldValue?.Width / newValue?.Width * previousScaleX ?? 1d;
+                lastAnimation = new AnimationHelper(
+                [
+                    new ScaleTransformScaleXAnimation(LeftNavigationControlBorder, TimeSpan.FromMilliseconds(300), scale,
+                        1d, new CubicEaseOut())
+                ]);
+                await lastAnimation.RunAsync();
+            };
+        };
 
-    }
 
+         GridRoot.Opacity = 0; // 在此处初始化透明度，不然将闪现
+        this.Loaded += (_, _) => AnimationIn();
+    }
+       
     private void SetupSide(string name, StandardCursorType cursor, WindowEdge edge)
     {
         var ctl = this.Get<Control>(name);
@@ -182,45 +206,4 @@ private void AnimationOut()
             mainWindowCompositionVisual.StartAnimationGroup(animationGroup);
         }
     }
-
-    private void Button_OnClick(object? sender, RoutedEventArgs e)
-    {
-        this.TestLoading.State = MyLoading.LoadingState.Loading;
-    }
-
-    private void Button2_OnClick(object? sender, RoutedEventArgs e)
-    {
-        this.TestLoading.State = MyLoading.LoadingState.Error;
-    }
-
-    private async void Search_Java_Button(object? sender, RoutedEventArgs e)
-    {
-        try
-        {
-            var javas = await Java.SearchJava();
-            Console.WriteLine($"找到 {javas.Count()} 个Java环境:");
-
-            foreach (var java in javas)
-            {
-                try
-                {
-                    Console.WriteLine("----------------------");
-                    Console.WriteLine($"路径: {java.DirectoryPath}");
-                    var version = java.Version;
-                    Console.WriteLine($"版本: Java {version}");
-                    Console.WriteLine($"位数: {(java.Is64Bit ? "64位" : "32位")}");
-                    Console.WriteLine($"类型: {(java.IsJre ? "JRE" : "JDK")}");
-                    Console.WriteLine($"可用: {java.Compability}");
-                }
-                catch (Exception ex)
-                {
-                    Console.WriteLine($"处理Java信息时出错: {ex.Message}");
-                }
-            }
-        }
-        catch (Exception ex)
-        {
-            Console.WriteLine($"搜索失败: {ex.Message}");
-        }
-    }
 }
\ No newline at end of file