MainWindow.axaml

<Window 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:local="clr-namespace:ShowWrite"
        xmlns:paz="using:Avalonia.Controls.PanAndZoom"
        xmlns:sys="clr-namespace:System;assembly=netstandard"
        x:Class="ShowWrite.MainWindow"
        x:DataType="local:MainWindow"
        Title="ShowWrite"
        WindowState="FullScreen"
        Background="{DynamicResource ThemeBackground}"
        WindowDecorations="None"
        CanResize="False"
        Opened="Window_Opened"
        Closing="Window_Closing">

    <Window.Resources>
        <local:SelectedBackgroundConverter x:Key="SelectedBackgroundConverter"/>
        <local:SelectedForegroundConverter x:Key="SelectedForegroundConverter"/>
        <local:LevelToIndentConverter x:Key="LevelToIndentConverter"/>
    </Window.Resources>

    <Window.Styles>
        <Style Selector="Path.icon-path">
            <Setter Property="Fill" Value="{DynamicResource ThemeIconColor}"/>
        </Style>
        <Style Selector="ToggleButton:checked Path.icon-path">
            <Setter Property="Fill" Value="White"/>
        </Style>
        <Style Selector="local|SvgIcon">
            <Setter Property="IconBrush" Value="{DynamicResource ThemeIconColor}"/>
        </Style>
        <Style Selector="ToggleButton:checked local|SvgIcon">
            <Setter Property="IconBrush" Value="White"/>
        </Style>
        <Style Selector="Border.no-background">
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="BorderThickness" Value="0"/>
        </Style>
        <Style Selector="ToggleButton.no-background:checked">
            <Setter Property="Background" Value="Transparent"/>
        </Style>
        <Style Selector="Button.nav-btn">
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="BorderThickness" Value="0"/>
            <Setter Property="Padding" Value="15,8"/>
            <Setter Property="Cursor" Value="Hand"/>
            <Setter Property="CornerRadius" Value="8"/>
        </Style>
        <Style Selector="Button.nav-btn:pointerover">
            <Setter Property="Background" Value="{DynamicResource ThemeHoverBackground}"/>
        </Style>
        <Style Selector="Button.nav-btn:pressed">
            <Setter Property="Background" Value="{DynamicResource ThemePressedBackground}"/>
        </Style>
        <Style Selector="Button.title-btn">
            <Setter Property="Background" Value="{DynamicResource ThemeSurface}"/>
            <Setter Property="BorderThickness" Value="3,0,0,0"/>
            <Setter Property="BorderBrush" Value="{DynamicResource ThemePrimary}"/>
            <Setter Property="Cursor" Value="Hand"/>
            <Setter Property="CornerRadius" Value="6"/>
            <Setter Property="Foreground" Value="{DynamicResource ThemeTextPrimary}"/>
        </Style>
        <Style Selector="Button.title-btn:pointerover">
            <Setter Property="Background" Value="{DynamicResource ThemeHoverBackground}"/>
        </Style>
        <Style Selector="Button.title-btn:pressed">
            <Setter Property="Background" Value="{DynamicResource ThemePressedBackground}"/>
        </Style>
        <Style Selector="ToggleButton.tool-btn">
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="BorderThickness" Value="0"/>
            <Setter Property="Padding" Value="12,8"/>
            <Setter Property="Cursor" Value="Hand"/>
            <Setter Property="CornerRadius" Value="{DynamicResource ThemeButtonCornerRadius}"/>
        </Style>
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            <Setter Property="Background" Value="{DynamicResource ThemePrimary}"/>
        </Style>
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            <Setter Property="BorderThickness" Value="0"/>
            <Setter Property="Padding" Value="{DynamicResource ThemeButtonPadding}"/>
            <Setter Property="Cursor" Value="Hand"/>
            <Setter Property="CornerRadius" Value="{DynamicResource ThemeButtonCornerRadius}"/>
        </Style>
        <Style Selector="ToggleButton.tool-btn-square:pointerover">
            <Setter Property="Background" Value="{DynamicResource ThemeHoverBackground}"/>
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            <Setter Property="Background" Value="{DynamicResource ThemePressedBackground}"/>
        </Style>
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            <Setter Property="Background" Value="{DynamicResource ThemePrimary}"/>
            <Setter Property="CornerRadius" Value="{DynamicResource ThemeButtonCornerRadius}"/>
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            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="CornerRadius" Value="{DynamicResource ThemeButtonCornerRadius}"/>
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            <Setter Property="Cursor" Value="Hand"/>
            <Setter Property="CornerRadius" Value="{DynamicResource ThemeButtonCornerRadius}"/>
        </Style>
        <Style Selector="Button.tool-btn-square:pointerover">
            <Setter Property="Background" Value="{DynamicResource ThemeHoverBackground}"/>
        </Style>
        <Style Selector="Button.tool-btn-square:pressed">
            <Setter Property="Background" Value="{DynamicResource ThemePressedBackground}"/>
        </Style>
        <Style Selector="ToggleButton.tool-btn-transparent">
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="BorderThickness" Value="0"/>
            <Setter Property="Padding" Value="{DynamicResource ThemeButtonPadding}"/>
            <Setter Property="Cursor" Value="Hand"/>
            <Setter Property="CornerRadius" Value="{DynamicResource ThemeButtonCornerRadius}"/>
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        </Style>
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            <Setter Property="Background" Value="Transparent"/>
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        <Style Selector="Button.delete-btn">
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            <Setter Property="Cursor" Value="Hand"/>
        </Style>
        <Style Selector="Button.delete-btn:pointerover">
            <Setter Property="Background" Value="{DynamicResource ThemeDangerHover}"/>
        </Style>
        <Style Selector="Button.delete-btn:pressed">
            <Setter Property="Background" Value="#C62828"/>
        </Style>
        <Style Selector="CheckBox.ink-checkbox">
            <Setter Property="Foreground" Value="{DynamicResource ThemeTextSecondary}"/>
        </Style>
        <Style Selector="CheckBox.ink-checkbox:pointerover /template/ ContentPresenter#PART_ContentPresenter">
            <Setter Property="Foreground" Value="{DynamicResource ThemeTextSecondary}"/>
        </Style>
        <Style Selector="CheckBox.ink-checkbox:pointerover">
            <Setter Property="Foreground" Value="{DynamicResource ThemeTextSecondary}"/>
        </Style>
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        </Style>
        <Style Selector="Button.nav-btn TextBlock">
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        </Style>
        <Style Selector="CheckBox.ink-checkbox">
            <Setter Property="FontFamily" Value="avares://ShowWrite/font/HarmonyOS_Sans_SC_Medium.ttf#HarmonyOS Sans SC"/>
        </Style>
        <Style Selector="Button.menu-btn">
            <Setter Property="FontFamily" Value="avares://ShowWrite/font/HarmonyOS_Sans_SC_Medium.ttf#HarmonyOS Sans SC"/>
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="BorderThickness" Value="0"/>
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            <Setter Property="HorizontalAlignment" Value="Stretch"/>
            <Setter Property="HorizontalContentAlignment" Value="Center"/>
        </Style>
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            <Setter Property="Background" Value="{DynamicResource ThemeHoverBackground}"/>
        </Style>
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            <Setter Property="Background" Value="{DynamicResource ThemePressedBackground}"/>
        </Style>
        <Style Selector="Button.tab-btn">
            <Setter Property="FontFamily" Value="avares://ShowWrite/font/HarmonyOS_Sans_SC_Medium.ttf#HarmonyOS Sans SC"/>
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            <Setter Property="BorderThickness" Value="0"/>
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            <Setter Property="Cursor" Value="Hand"/>
            <Setter Property="CornerRadius" Value="0"/>
            <Setter Property="FontSize" Value="13"/>
            <Setter Property="Foreground" Value="{DynamicResource ThemeTextSecondary}"/>
            <Setter Property="HorizontalAlignment" Value="Stretch"/>
            <Setter Property="HorizontalContentAlignment" Value="Center"/>
        </Style>
        <Style Selector="Button.tab-btn:pointerover">
            <Setter Property="Background" Value="#15FFFFFF"/>
        </Style>
        <Style Selector="Button.tab-btn.active">
            <Setter Property="Background" Value="{DynamicResource ThemePrimary}"/>
            <Setter Property="Foreground" Value="White"/>
            <Setter Property="FontWeight" Value="Bold"/>
        </Style>
        <Style Selector="Button.tab-btn.active:pointerover">
            <Setter Property="Background" Value="{DynamicResource ThemePrimaryHover}"/>
        </Style>
    </Window.Styles>

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                        HorizontalAlignment="Stretch" 
                        VerticalAlignment="Stretch"
                        Stretch="None"
                        ZoomSpeed="1.2"
                        MinZoomX="0.1"
                        MaxZoomX="5.0"
                        MinZoomY="0.1"
                        MaxZoomY="5.0"
                        EnablePan="True"
                        EnableZoom="True"
                        EnableGestureZoom="False"
                        EnableGestureTranslation="True"
                        EnableAnimations="False"
                        ClipToBounds="True"
                        Focusable="True"
                        PanButton="Left"
                        Background="{DynamicResource ThemeVideoBackground}">
            <Grid x:Name="VideoAreaContainer"
                  HorizontalAlignment="Left"
                  VerticalAlignment="Top"
                  Background="Transparent"
                  RenderTransformOrigin="0,0">
                <Image x:Name="VideoImage" Stretch="Uniform" HorizontalAlignment="Left" VerticalAlignment="Top"/>
            
            <Canvas x:Name="KeystoneOverlayCanvas" IsVisible="False">
                <Polygon x:Name="KeystonePolygon" 
                         Fill="#30FF0000" 
                         Stroke="#FF0000" 
                         StrokeThickness="2"
                         Points="0,0 0,0 0,0 0,0"/>
                
                <Border x:Name="KeystonePointTL" 
                        Canvas.Left="0" Canvas.Top="0"
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                        Tag="0">
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                        Cursor="Hand"
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                    </Canvas>

                    <Canvas x:Name="ElemGeo" Width="50" Height="50">
                        <Path x:Name="GeoFill" Width="50" Height="50"
                              Fill="#FFB23B"
                              Stretch="Uniform"
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                    </Canvas>
                </StackPanel>
            </StackPanel>

        <TextBlock x:Name="CameraInfoText"
                   FontSize="14"
                   Foreground="#AAAAAA"
                   HorizontalAlignment="Left"
                   VerticalAlignment="Top"
                   Margin="20"
                   IsVisible="False"
                   ZIndex="50"/>

        <Border x:Name="PhotoPanel"
                Width="280"
                HorizontalAlignment="Right"
                VerticalAlignment="Stretch"
                Background="{DynamicResource ThemeSurface}"
                BorderBrush="{DynamicResource ThemeSurfaceVariant}"
                BorderThickness="1,0,0,0"
                IsVisible="False"
                Margin="0,0,0,60"
                ZIndex="300">
            <Grid>
                <Grid.RowDefinitions>
                    <RowDefinition Height="*"/>
                    <RowDefinition Height="Auto"/>
                </Grid.RowDefinitions>

                <!-- Row 0: 内容区域（根据选中的选项卡显示照片内容或题目内容） -->
                <!-- 照片内容（"文件"选项卡选中时显示） -->
                <Grid Grid.Row="0" x:Name="PhotoContentPanel">
                    <Grid.RowDefinitions>
                        <RowDefinition Height="*"/>
                        <RowDefinition Height="Auto"/>
                    </Grid.RowDefinitions>

                    <Grid Grid.Row="0">
                        <!-- Avalonia 12.1 的 ScrollViewer 测量内容时忽略 Padding，导致条目右侧被视口裁切；
                             改用 ItemsControl 的 Margin 留白，并关闭滚动条覆盖模式避免遮挡圆角 -->
                        <ScrollViewer x:Name="PhotoListScrollViewer" AllowAutoHide="False">
                            <ItemsControl x:Name="PhotoList" ItemsSource="{Binding Photos}" x:CompileBindings="False" Margin="8">
                                <ItemsControl.ItemTemplate>
                                <DataTemplate x:DataType="local:PhotoItem">
                                    <Border x:Name="PhotoItemBorder"
                                            Background="{Binding IsSelected, Converter={StaticResource SelectedBackgroundConverter}}"
                                            CornerRadius="8"
                                            Margin="4"
                                            Padding="8"
                                            Cursor="Hand"
                                            PointerPressed="PhotoItem_PointerPressed"
                                            PointerMoved="PhotoItem_PointerMoved"
                                            PointerReleased="PhotoItem_PointerReleased"
                                            Tag="{Binding}">
                                        <Grid RowDefinitions="Auto,*">
                                            <TextBlock Grid.Row="0"
                                                       Text="{Binding Index}"
                                                       FontSize="12"
                                                       FontWeight="Bold"
                                                       Foreground="{Binding IsSelected, Converter={StaticResource SelectedForegroundConverter}}"
                                                       HorizontalAlignment="Left"
                                                       Margin="0,0,0,4"/>
                                            <Grid Grid.Row="1">
                                                <Image Source="{Binding Thumbnail}"
                                                       Stretch="Uniform"
                                                       HorizontalAlignment="Stretch"/>
                                                <Border IsVisible="{Binding IsSelected}"
                                                        Background="#80000000"
                                                        VerticalAlignment="Stretch"
                                                        HorizontalAlignment="Stretch">
                                                    <TextBlock Text="再次点击&#10;返回实时"
                                                               FontSize="14"
                                                               FontWeight="Bold"
                                                               Foreground="White"
                                                               HorizontalAlignment="Center"
                                                               VerticalAlignment="Center"
                                                               TextAlignment="Center"/>
                                                </Border>
                                                <Grid HorizontalAlignment="Left"
                                                      VerticalAlignment="Bottom"
                                                      Margin="4">
                                                    <Grid.RowDefinitions>
                                                        <RowDefinition Height="Auto"/>
                                                        <RowDefinition Height="Auto"/>
                                                    </Grid.RowDefinitions>
                                                    <CheckBox x:Name="PhotoCheckBox"
                                                              Grid.Row="0"
                                                              HorizontalAlignment="Left"
                                                              IsChecked="{Binding IsChecked}"
                                                              IsVisible="{Binding $parent[ItemsControl].((local:MainWindow)DataContext).IsSelectMode}"
                                                              Background="White"
                                                              BorderBrush="#CCCCCC"/>
                                                    <Button Width="28"
                                                            Height="28"
                                                            Grid.Row="1"
                                                            HorizontalAlignment="Left"
                                                            Classes="delete-btn"
                                                            CornerRadius="14"
                                                            Padding="0"
                                                            Click="DeletePhoto_Click"
                                                            Tag="{Binding}"
                                                            IsVisible="{Binding !IsDeleting}">
                                                        <Viewbox Width="16" Height="16">
                                                            <Path Fill="White" Data="M5.75 3V1.5h4.5V3zm-1.5 0V1a1 1 0 0 1 1-1h5.5a1 1 0 0 1 1 1v2h2.5a.75.75 0 0 1 0 1.5h-.365l-.743 9.653A2 2 0 0 1 11.148 16H4.852a2 2 0 0 1-1.994-1.847L2.115 4.5H1.75a.75.75 0 0 1 0-1.5zm-.63 1.5h8.76l-.734 9.538a.5.5 0 0 1-.498.462H4.852a.5.5 0 0 1-.498-.462z"/>
                                                        </Viewbox>
                                                    </Button>
                                                    <StackPanel Orientation="Vertical"
                                                                Grid.Row="1"
                                                                HorizontalAlignment="Left"
                                                                Spacing="4"
                                                                IsVisible="{Binding IsDeleting}">
                                                        <Button Content="确认删除"
                                                                FontSize="11"
                                                                Classes="delete-btn"
                                                                Foreground="White"
                                                                CornerRadius="4"
                                                                Padding="8,4"
                                                                Click="ConfirmDeletePhoto_Click"
                                                                Tag="{Binding}"/>
                                                        <Button Content="取消"
                                                                FontSize="11"
                                                                Background="#555555"
                                                                Foreground="White"
                                                                CornerRadius="4"
                                                                Padding="8,4"
                                                                Click="CancelDeletePhoto_Click"
                                                                Tag="{Binding}"/>
                                                    </StackPanel>
                                                </Grid>
                                            </Grid>
                                        </Grid>
                                    </Border>
                                </DataTemplate>
                            </ItemsControl.ItemTemplate>
                        </ItemsControl>
                    </ScrollViewer>

                    <Border x:Name="ImportingOverlay"
                            Background="#E0000000"
                            IsVisible="False"
                            VerticalAlignment="Center"
                            HorizontalAlignment="Center"
                            CornerRadius="8"
                            Padding="20,12">
                        <StackPanel Orientation="Horizontal" Spacing="8">
                            <ProgressBar IsIndeterminate="True"
                                         Width="120"
                                         Height="6"
                                         HorizontalAlignment="Center"/>
                            <TextBlock Text="正在导入，请等待..."
                                       FontSize="14"
                                       Foreground="White"
                                       HorizontalAlignment="Center"/>
                        </StackPanel>
                    </Border>
                </Grid>

                <Border Grid.Row="1"
                            Background="Transparent"
                            Padding="12,8">
                        <StackPanel Orientation="Vertical"
                                    HorizontalAlignment="Center"
                                    Spacing="8">
                            <StackPanel x:Name="NormalButtons"
                                        Orientation="Horizontal"
                                        HorizontalAlignment="Center"
                                        Spacing="16">
                                <Button x:Name="SavePhotoBtn"
                                        Classes="nav-btn"
                                        Click="SavePhotoBtn_Click">
                                    <StackPanel Orientation="Horizontal" Spacing="8">
                                        <local:SvgIcon Width="18" Height="18"
                                                       IconName="floppy"/>
                                        <TextBlock Text="保存照片" FontSize="12" Foreground="{DynamicResource ThemeTextSecondary}" VerticalAlignment="Center"/>
                                    </StackPanel>
                                </Button>

                                <Button x:Name="ImportPhotoBtn"
                                        Classes="nav-btn"
                                        Click="ImportPhotoBtn_Click">
                                    <StackPanel Orientation="Horizontal" Spacing="8">
                                        <local:SvgIcon Width="18" Height="18"
                                                       IconName="import"/>
                                        <TextBlock Text="导入" FontSize="12" Foreground="{DynamicResource ThemeTextSecondary}" VerticalAlignment="Center"/>
                                    </StackPanel>
                                </Button>
                            </StackPanel>

                            <StackPanel x:Name="SelectModeButtons"
                                        Orientation="Horizontal"
                                        HorizontalAlignment="Center"
                                        Spacing="12"
                                        IsVisible="False">
                                <Button Classes="nav-btn"
                                        Click="ConfirmSavePhotos_Click">
                                    <TextBlock Text="确定" FontSize="12" Foreground="{DynamicResource ThemeTextSecondary}" VerticalAlignment="Center"/>
                                </Button>
                                <Button Classes="nav-btn"
                                        Click="CancelSelectMode_Click">
                                    <TextBlock Text="取消" FontSize="12" Foreground="{DynamicResource ThemeTextSecondary}" VerticalAlignment="Center"/>
                                </Button>
                                <Button Classes="nav-btn"
                                        Click="InvertSelection_Click">
                                    <TextBlock Text="反选" FontSize="12" Foreground="{DynamicResource ThemeTextSecondary}" VerticalAlignment="Center"/>
                                </Button>
                            </StackPanel>

                            <CheckBox x:Name="IncludeInkCheckBox"
                                      Classes="ink-checkbox"
                                      Content="保留墨迹注释"
                                      HorizontalAlignment="Center"
                                      Margin="0,8,0,0"/>
                        </StackPanel>
                    </Border>
                </Grid>

                <!-- 题目内容（"题目"选项卡选中时显示：OCR 识别已拍照片中的目录信息） -->
                <Grid Grid.Row="0" x:Name="TitleContentPanel" IsVisible="False">
                    <Grid.RowDefinitions>
                        <RowDefinition Height="*"/>
                        <RowDefinition Height="Auto"/>
                    </Grid.RowDefinitions>

                    <ScrollViewer Grid.Row="0" AllowAutoHide="False" HorizontalScrollBarVisibility="Disabled">
                        <ItemsControl x:Name="TitleList" ItemsSource="{Binding Titles}" x:CompileBindings="False" Margin="8">
                            <ItemsControl.ItemTemplate>
                                <DataTemplate x:DataType="local:TitleEntry">
                                    <Button Classes="title-btn"
                                            Click="TitleButton_Click"
                                            Tag="{Binding}"
                                            Margin="{Binding Level, Converter={StaticResource LevelToIndentConverter}}"
                                            HorizontalAlignment="Stretch"
                                            HorizontalContentAlignment="Left"
                                            Padding="10,6">
                                        <Grid ColumnDefinitions="Auto,*">
                                            <Border Grid.Column="0"
                                                    Background="{DynamicResource ThemePrimary}"
                                                    CornerRadius="4"
                                                    Padding="5,1"
                                                    Margin="0,0,8,0"
                                                    VerticalAlignment="Center">
                                                <TextBlock Text="{Binding Badge}" FontSize="10" Foreground="White" FontWeight="Bold"/>
                                            </Border>
                                            <TextBlock Grid.Column="1"
                                                       Text="{Binding Display}"
                                                       FontSize="13"
                                                       TextTrimming="CharacterEllipsis"
                                                       VerticalAlignment="Center"/>
                                        </Grid>
                                    </Button>
                                </DataTemplate>
                            </ItemsControl.ItemTemplate>
                        </ItemsControl>
                    </ScrollViewer>

                    <Border Grid.Row="1" Background="Transparent" Padding="12,8">
                        <StackPanel Orientation="Horizontal"
                                    HorizontalAlignment="Center"
                                    Spacing="12">
                            <Button x:Name="OcrReRunBtn"
                                    Classes="nav-btn"
                                    Click="OcrReRun_Click">
                                <StackPanel Orientation="Horizontal" Spacing="8">
                                    <local:SvgIcon Width="18" Height="18" IconName="scan"/>
                                    <TextBlock Text="重新识别" FontSize="12" Foreground="{DynamicResource ThemeTextSecondary}" VerticalAlignment="Center"/>
                                </StackPanel>
                            </Button>
                            <Button x:Name="OcrClearBtn"
                                    Classes="nav-btn"
                                    Click="OcrClear_Click">
                                <TextBlock Text="清空" FontSize="12" Foreground="{DynamicResource ThemeTextSecondary}" VerticalAlignment="Center"/>
                            </Button>
                        </StackPanel>
                    </Border>

                    <Border x:Name="OcrOverlay"
                            Grid.Row="0"
                            Background="#E0000000"
                            IsVisible="False"
                            VerticalAlignment="Center"
                            HorizontalAlignment="Center"
                            CornerRadius="8"
                            Padding="20,12">
                        <StackPanel Orientation="Vertical" Spacing="8" HorizontalAlignment="Center">
                            <ProgressBar x:Name="OcrProgressBar"
                                         IsIndeterminate="False"
                                         Minimum="0"
                                         Maximum="100"
                                         Width="200"
                                         Height="6"
                                         HorizontalAlignment="Center"/>
                            <TextBlock x:Name="OcrStatusText"
                                       Text="准备中..."
                                       FontSize="13"
                                       Foreground="White"
                                       HorizontalAlignment="Center"/>
                        </StackPanel>
                    </Border>
                </Grid>

                <!-- Row 1: 底部选择栏（左右排版的选项卡） -->
                <Border x:Name="PhotoTabBar"
                        Grid.Row="1"
                        Background="Transparent"
                        BorderBrush="Transparent"
                        BorderThickness="0"
                        Padding="0">
                    <Grid ColumnDefinitions="*,*">
                        <Button x:Name="FileTabBtn"
                                Grid.Column="0"
                                Classes="tab-btn active"
                                Content="文件"
                                Click="FileTab_Click"/>
                        <Button x:Name="TitleTabBtn"
                                Grid.Column="1"
                                Classes="tab-btn"
                                Content="题目"
                                Click="TitleTab_Click"/>
                    </Grid>
                </Border>
            </Grid>
        </Border>

        <Popup x:Name="MoreMenuPopup"
               Placement="Top"
               IsLightDismissEnabled="True"
               IsOpen="False">
            <Border Background="{DynamicResource ThemeSurface}" CornerRadius="8" Padding="4" BorderBrush="{DynamicResource ThemeSurfaceVariant}" BorderThickness="1">
                <StackPanel HorizontalAlignment="Stretch">
                    <Button Content="切换摄像头" Click="SwitchCamera_Click" Classes="menu-btn" Foreground="{DynamicResource ThemeTextPrimary}" Padding="20,12"/>
                    <Button Content="梯形校正" Click="KeystoneCorrection_Click" Classes="menu-btn" Foreground="{DynamicResource ThemeTextPrimary}" Padding="20,12"/>
                    <Button Content="清除矫正" Click="ClearKeystone_Click" Classes="menu-btn" Foreground="{DynamicResource ThemeTextPrimary}" Padding="20,12"/>
					<Button Content="闪记" Click="OpenRandomNoteWindow_Click" Classes="menu-btn" Foreground="{DynamicResource ThemeTextPrimary}" Padding="20,12"/>
					<Button Content="设置" Click="OpenSettings_Click" Classes="menu-btn" Foreground="{DynamicResource ThemeTextPrimary}" Padding="20,12"/>
                    <Button Content="退出" Click="Exit_Click" Classes="menu-btn" Foreground="{DynamicResource ThemeTextPrimary}" Padding="20,12"/>
                </StackPanel>
            </Border>
        </Popup>

        <Border x:Name="PagePanel"
                Grid.Row="0"
                Grid.RowSpan="2"
                Width="280"
                HorizontalAlignment="Right"
                VerticalAlignment="Stretch"
                Background="{DynamicResource ThemeSurface}"
                BorderBrush="{DynamicResource ThemeSurfaceVariant}"
                BorderThickness="1,0,0,0"
                IsVisible="False"
                Margin="0,0,0,60"
                ZIndex="250">
            <Border.RenderTransform>
                <TranslateTransform X="280"/>
            </Border.RenderTransform>
            <Grid>
                <Grid.RowDefinitions>
                    <RowDefinition Height="Auto"/>
                    <RowDefinition Height="*"/>
                    <RowDefinition Height="Auto"/>
                </Grid.RowDefinitions>
                
                <!-- PPT页数信息 -->
                <Border Grid.Row="0" Background="Transparent" Padding="12,8">
                    <TextBlock x:Name="PptPageInfo" Text="" FontSize="12" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center"/>
                </Border>
                
                <Grid Grid.Row="1">
                    <ScrollViewer AllowAutoHide="False">
                        <ItemsControl x:Name="PageList" ItemsSource="{Binding WhiteboardPageThumbnails}" x:CompileBindings="False" Margin="8">
                            <ItemsControl.ItemTemplate>
                                <DataTemplate x:DataType="local:WhiteboardPageThumbnail">
                                    <Border x:Name="PageItemBorder"
                                            Background="{Binding IsSelected, Converter={StaticResource SelectedBackgroundConverter}}"
                                            CornerRadius="8" 
                                            Margin="4"
                                            Padding="8"
                                            Cursor="Hand"
                                            PointerPressed="PageItem_PointerPressed"
                                            Tag="{Binding PageNumber}">
                                        <Grid RowDefinitions="Auto,*">
                                            <TextBlock Grid.Row="0"
                                                       Text="{Binding PageNumber, StringFormat='第{0}页'}"
                                                       FontSize="12"
                                                       FontWeight="Bold"
                                                       Foreground="{Binding IsSelected, Converter={StaticResource SelectedForegroundConverter}}"
                                                       HorizontalAlignment="Left"
                                                       Margin="0,0,0,4"/>
                                            <Border Grid.Row="1"
                                                    Background="#2E5C4A"
                                                    CornerRadius="4"
                                                    Height="120">
                                                <Image Source="{Binding Thumbnail}"
                                                       Stretch="Uniform"
                                                       HorizontalAlignment="Stretch"
                                                       VerticalAlignment="Stretch"/>
                                            </Border>
                                        </Grid>
                                    </Border>
                                </DataTemplate>
                            </ItemsControl.ItemTemplate>
                        </ItemsControl>
                    </ScrollViewer>
                    
                    <Border x:Name="PageImportingOverlay"
                            Background="#E0000000"
                            IsVisible="False"
                            VerticalAlignment="Center"
                            HorizontalAlignment="Center"
                            CornerRadius="8"
                            Padding="20,12">
                        <StackPanel Orientation="Vertical" Spacing="8">
                            <ProgressBar IsIndeterminate="True"
                                         Width="120"
                                         Height="6"
                                         HorizontalAlignment="Center"/>
                            <TextBlock Text="正在导入文件，请等待..."
                                       FontSize="14"
                                       Foreground="White"
                                       HorizontalAlignment="Center"/>
                        </StackPanel>
                    </Border>
                </Grid>
                
                <Border Grid.Row="2" 
                        Background="Transparent" 
                        Padding="12,8">
                    <StackPanel Orientation="Vertical" 
                                HorizontalAlignment="Center" 
                                Spacing="8">
                        <Button Classes="nav-btn"
                                Click="AddPageBtn_Click">
                            <StackPanel Orientation="Horizontal" Spacing="8">
                                <Viewbox Width="18" Height="18">
                                    <Path Classes="icon-path" Data="M19 13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z"/>
                                </Viewbox>
                                <TextBlock Text="添加新页" FontSize="12" Foreground="{DynamicResource ThemeTextSecondary}" VerticalAlignment="Center"/>
                            </StackPanel>
                        </Button>
                        
                        <Button Classes="nav-btn"
                                Click="ImportPptBtn_Click">
                            <StackPanel Orientation="Horizontal" Spacing="8">
                                <Viewbox Width="18" Height="18">
                                    <Path Classes="icon-path" Data="M19 3H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2zm0 16H5V5h14v14zM7 10h2v7H7zm4-3h2v10h-2zm4 6h2v4h-2z"/>
                                </Viewbox>
                                <TextBlock Text="导入文件" FontSize="12" Foreground="{DynamicResource ThemeTextSecondary}" VerticalAlignment="Center"/>
                            </StackPanel>
                        </Button>
                    </StackPanel>
                </Border>
            </Grid>
        </Border>

        <Button x:Name="PluginCancelButton"
                Classes="tool-btn-square"
                Width="56"
                Height="56"
                IsVisible="False"
                HorizontalAlignment="Center"
                VerticalAlignment="Center"
                ZIndex="300"
                Click="PluginCancelButton_Click">
            <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                <Grid.RowDefinitions>
                    <RowDefinition Height="*"/>
                    <RowDefinition Height="Auto"/>
                </Grid.RowDefinitions>
                <Viewbox Grid.Row="0" Width="28" Height="28" HorizontalAlignment="Center">
                    <Path Classes="icon-path" Data="M19 6.41L17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12z"/>
                </Viewbox>
                <TextBlock Grid.Row="1" Text="取消" FontSize="10" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center" Margin="0,4,0,0" Classes="button-text-label"/>
            </Grid>
        </Button>

        <Popup x:Name="PenSettingsPopup"
               Placement="Top"
               PlacementTarget="{Binding #PenBtn}"
               IsLightDismissEnabled="True"
               IsOpen="False">
            <Border Background="{DynamicResource ThemeSurface}" CornerRadius="12" Padding="12" BorderBrush="{DynamicResource ThemeSurfaceVariant}" BorderThickness="1">
                <StackPanel Spacing="8">
                    <TextBlock Text="颜色" FontSize="13" Foreground="{DynamicResource ThemeTextSecondary}" Margin="0,0,0,2"/>
                    <Grid x:Name="ColorGrid" Width="200">
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="*"/>
                            <ColumnDefinition Width="*"/>
                            <ColumnDefinition Width="*"/>
                            <ColumnDefinition Width="*"/>
                            <ColumnDefinition Width="*"/>
                        </Grid.ColumnDefinitions>
                        <Grid.RowDefinitions>
                            <RowDefinition Height="Auto"/>
                            <RowDefinition Height="Auto"/>
                            <RowDefinition Height="Auto"/>
                            <RowDefinition Height="Auto"/>
                            <RowDefinition Height="Auto"/>
                            <RowDefinition Height="Auto"/>
                        </Grid.RowDefinitions>
                    </Grid>
                    
                    <Border Height="1" Background="{DynamicResource ThemeSurfaceVariant}" Margin="0,4"/>
                    
                    <TextBlock Text="粗细" FontSize="13" Foreground="{DynamicResource ThemeTextSecondary}" Margin="0,0,0,2"/>
                    <StackPanel x:Name="SizePanel" Orientation="Horizontal" Spacing="8" HorizontalAlignment="Center">
                    </StackPanel>
                </StackPanel>
            </Border>
        </Popup>

        <Popup x:Name="ClearSlidePopup"
               Placement="Top"
               PlacementTarget="{Binding #EraserBtn}"
               IsLightDismissEnabled="True"
               IsOpen="False">
            <Border Background="{DynamicResource ThemeSurface}" CornerRadius="12" Padding="16" BorderBrush="{DynamicResource ThemeSurfaceVariant}" BorderThickness="1">
                <StackPanel Spacing="12" Width="200">
                    <TextBlock Text="滑动清屏" FontSize="13" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center"/>
                    <Grid>
                        <Border x:Name="SlideTrack" 
                                Height="44" 
                                CornerRadius="22" 
                                Background="{DynamicResource ThemeSurfaceVariant}">
                            <TextBlock Text="→ 滑动清屏 →" 
                                       FontSize="12" 
                                       Foreground="{DynamicResource ThemeTextTertiary}" 
                                       HorizontalAlignment="Center" 
                                       VerticalAlignment="Center"
                                       IsHitTestVisible="False"/>
                        </Border>
                        <Border x:Name="SlideThumb"
                                Width="44"
                                Height="44"
                                CornerRadius="22"
                                Background="#FF6B6B"
                                Cursor="Hand"
                                HorizontalAlignment="Left"
                                Margin="0,0,0,0">
                            <Viewbox Width="20" Height="20">
                                <Path Fill="White" Data="M16.5 4.478v.227a49 49 0 0 1 3.878.512a.75.75 0 1 1-.256 1.478l-.209-.035l-1.005 13.07a3 3 0 0 1-2.991 2.77H8.084a3 3 0 0 1-2.991-2.77L4.087 6.66l-.209.035a.75.75 0 0 1-.256-1.478A49 49 0 0 1 7.5 4.705v-.227c0-1.564 1.213-2.9 2.816-2.951a53 53 0 0 1 3.369 0c1.603.051 2.815 1.387 2.815 2.951m-6.136-1.452a51 51 0 0 1 3.273 0C14.39 3.05 15 3.684 15 4.478v.113a50 50 0 0 0-6 0v-.113c0-.794.609-1.428 1.364-1.452m-.355 5.945a.75.75 0 1 0-1.5.058l.347 9a.75.75 0 1 0 1.499-.058zm5.48.058a.75.75 0 1 0-1.498-.058l-.347 9a.75.75 0 0 0 1.5.058z"/>
                            </Viewbox>
                        </Border>
                    </Grid>
                </StackPanel>
            </Border>
        </Popup>

        <Popup x:Name="VideoAdjustPopup"
               Placement="Top"
               PlacementTarget="{Binding #VideoAdjustBtn}"
               IsLightDismissEnabled="True"
               IsOpen="False">
            <Border Background="{DynamicResource ThemeSurface}" CornerRadius="12" Padding="12" BorderBrush="{DynamicResource ThemeSurfaceVariant}" BorderThickness="1">
                <StackPanel Orientation="Horizontal" Spacing="8">
                    <Button Width="48"
                            Height="48"
                            Classes="tool-btn-square"
                            Click="RotateLeft_Click">
                        <Viewbox Width="24" Height="24">
                            <Path Classes="icon-path" Data="M4.596 12.05q-.255 0-.405-.173q-.149-.173-.081-.423q.15-.798.448-1.498t.719-1.327q.134-.194.372-.215q.237-.022.42.155q.129.129.14.294t-.086.304q-.385.58-.64 1.205q-.254.626-.399 1.294q-.036.17-.18.277t-.308.107m6.354 8.335q0 .28-.183.427q-.182.146-.432.079q-.754-.175-1.464-.47q-.71-.296-1.342-.717q-.195-.135-.216-.363t.156-.41q.129-.129.293-.14q.165-.012.305.086q.58.385 1.205.63t1.274.37q.171.037.288.19q.116.152.116.318M6.07 17.53q-.184.177-.421.156q-.238-.021-.372-.216q-.44-.652-.726-1.361q-.286-.71-.441-1.464q-.068-.25.079-.423q.146-.173.407-.173q.171 0 .312.107t.176.278q.145.667.4 1.293t.639 1.205q.098.14.077.317t-.13.28m7.47 3.355q-.25.067-.42-.08t-.17-.401q0-.171.107-.312t.278-.176q2.453-.524 4.034-2.444t1.581-4.422q0-2.925-2.037-4.962T11.95 6.05h-.777l1.746 1.746q.16.16.16.354t-.16.354t-.353.16q-.195 0-.354-.16L9.823 6.116q-.13-.131-.183-.268q-.053-.136-.053-.298t.053-.298q.052-.136.183-.267l2.383-2.389q.165-.16.36-.16t.353.16q.166.165.166.36t-.16.353l-1.74 1.741h.765q3.327 0 5.664 2.337t2.336 5.663q0 2.889-1.813 5.077t-4.596 2.758"/>
                        </Viewbox>
                    </Button>
                    <Button Width="48"
                            Height="48"
                            Classes="tool-btn-square"
                            Click="RotateRight_Click">
                        <Viewbox Width="24" Height="24">
                            <Path Classes="icon-path" Data="M13.05 21v-1.05q.85-.125 1.663-.45t1.537-.85l.708.72q-.858.645-1.844 1.056T13.05 21m-2 0q-3.008-.392-5.004-2.651T4.05 13.05q0-1.664.626-3.118T6.39 7.39t2.542-1.714t3.118-.626h.766l-2.089-2.088l.708-.72l3.307 3.308l-3.308 3.308l-.707-.708l2.1-2.1h-.777q-2.925 0-4.962 2.038T5.05 13.05q0 2.6 1.7 4.563t4.3 2.376zm7.32-3.042l-.72-.708q.525-.725.86-1.528t.479-1.672H20q-.125 1.058-.545 2.044t-1.086 1.864M20 12.05h-1.012q-.144-.87-.479-1.672q-.334-.803-.859-1.528l.72-.708q.646.802 1.063 1.794T20 12.05"/>
                        </Viewbox>
                    </Button>
                </StackPanel>
            </Border>
        </Popup>

        <Border x:Name="WhiteboardBackground"
                Background="#2E5C4A"
                IsVisible="False"
                HorizontalAlignment="Stretch"
                VerticalAlignment="Stretch"
                ZIndex="100"/>

        <Border x:Name="BottomToolbar" 
                Background="Transparent"
                Padding="20,12"
                VerticalAlignment="Bottom"
                ZIndex="200">
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="*"/>
                    <ColumnDefinition Width="Auto"/>
                    <ColumnDefinition Width="*"/>
                </Grid.ColumnDefinitions>

                <!-- 左侧按钮组 -->
                <Border x:Name="LeftButtonGroup"
                        Grid.Column="0"
                        Background="{DynamicResource ThemeSurface}" 
                        Opacity="0.8"
                        CornerRadius="{DynamicResource ThemeButtonGroupCornerRadius}"
                        Padding="{DynamicResource ThemeButtonGroupPadding}"
                        VerticalAlignment="Center"
                        HorizontalAlignment="Left">
                    <Grid>
                        <!-- 普通模式左侧按钮 -->
                        <StackPanel x:Name="NormalBottomButtons"
                                    Orientation="Horizontal" 
                                    Spacing="0">
                            <Button x:Name="MoreButton" 
                                    Classes="tool-btn-square"
                                    Width="56"
                                    Height="56"
                                    Click="MoreButton_Click">
                                <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="*"/>
                                        <RowDefinition Height="Auto"/>
                                    </Grid.RowDefinitions>
                                    <local:SvgIcon Grid.Row="0" Width="28" Height="28" HorizontalAlignment="Center"
                                                   IconName="more"/>
                                    <TextBlock Grid.Row="1" Text="更多" FontSize="10" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center" Margin="0,4,0,0" Classes="button-text-label"/>
                                </Grid>
                            </Button>
                            
                            <Button x:Name="PictureInPictureBtn"
                                    Classes="tool-btn-square"
                                    Width="56"
                                    Height="56"
                                    IsVisible="False"
                                    Click="PictureInPicture_Click">
                                <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="*"/>
                                        <RowDefinition Height="Auto"/>
                                    </Grid.RowDefinitions>
                                    <local:SvgIcon Grid.Row="0" Width="28" Height="28" HorizontalAlignment="Center"
                                                   IconName="chalkboard"/>
                                    <TextBlock Grid.Row="1" Text="版中版" FontSize="10" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center" Margin="0,4,0,0" Classes="button-text-label"/>
                                </Grid>
                            </Button>
                            
                            <Button Classes="tool-btn-square"
                                    Width="56"
                                    Height="56"
                                    Click="Minimize_Click">
                                <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="*"/>
                                        <RowDefinition Height="Auto"/>
                                    </Grid.RowDefinitions>
                                    <local:SvgIcon Grid.Row="0" Width="28" Height="28" HorizontalAlignment="Center"
                                                   IconName="minimize"/>
                                    <TextBlock Grid.Row="1" Text="最小化" FontSize="10" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center" Margin="0,4,0,0" Classes="button-text-label"/>
                                </Grid>
                            </Button>
                        </StackPanel>
                        
                        <!-- 白板模式左侧按钮 -->
                        <StackPanel x:Name="WhiteboardModeButtons"
                                    Orientation="Horizontal" 
                                    Spacing="0"
                                    IsVisible="False">
                            <Button x:Name="ExitWhiteboardBtn" 
                                    Classes="tool-btn-square"
                                    Width="56"
                                    Height="56"
                                    Click="ExitWhiteboard_Click">
                                <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="*"/>
                                        <RowDefinition Height="Auto"/>
                                    </Grid.RowDefinitions>
                                    <Viewbox Grid.Row="0" Width="28" Height="28" HorizontalAlignment="Center">
                                        <Path Classes="icon-path" Data="M19 6.41L17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12z"/>
                                    </Viewbox>
                                    <TextBlock Grid.Row="1" Text="收起" FontSize="10" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center" Margin="0,4,0,0" Classes="button-text-label"/>
                                </Grid>
                            </Button>
                            
                            <Button Classes="tool-btn-square"
                                    Width="56"
                                    Height="56"
                                    Click="Minimize_Click">
                                <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="*"/>
                                        <RowDefinition Height="Auto"/>
                                    </Grid.RowDefinitions>
                                    <local:SvgIcon Grid.Row="0" Width="28" Height="28" HorizontalAlignment="Center"
                                                   IconName="minimize"/>
                                    <TextBlock Grid.Row="1" Text="最小化" FontSize="10" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center" Margin="0,4,0,0" Classes="button-text-label"/>
                                </Grid>
                            </Button>
                        </StackPanel>
                    </Grid>
                </Border>

                <!-- 梯形校正模式左侧按钮组 -->
                <Border x:Name="KeystoneButtonGroup"
                        Grid.Column="0"
                        Background="{DynamicResource ThemeSurface}" 
                        Opacity="0.8"
                        CornerRadius="{DynamicResource ThemeButtonGroupCornerRadius}"
                        Padding="{DynamicResource ThemeButtonGroupPadding}"
                        VerticalAlignment="Center"
                        IsVisible="False">
                    <StackPanel x:Name="KeystoneCorrectionButtons"
                                Orientation="Horizontal" 
                                Spacing="0">
                        <Button Classes="tool-btn-square"
                                Width="56"
                                Height="56"
                                Click="ConfirmKeystone_Click">
                            <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                                <Grid.RowDefinitions>
                                    <RowDefinition Height="*"/>
                                    <RowDefinition Height="Auto"/>
                                </Grid.RowDefinitions>
                                <Viewbox Grid.Row="0" Width="28" Height="28" HorizontalAlignment="Center">
                                    <Path Fill="#4CAF50" Data="M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z"/>
                                </Viewbox>
                                <TextBlock Grid.Row="1" Text="确定" FontSize="10" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center" Margin="0,4,0,0" Classes="button-text-label"/>
                            </Grid>
                        </Button>
                        <Button Classes="tool-btn-square"
                                Width="56"
                                Height="56"
                                Click="CancelKeystone_Click">
                            <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                                <Grid.RowDefinitions>
                                    <RowDefinition Height="*"/>
                                    <RowDefinition Height="Auto"/>
                                </Grid.RowDefinitions>
                                <Viewbox Grid.Row="0" Width="28" Height="28" HorizontalAlignment="Center">
                                    <Path Fill="#F44336" Data="M19 6.41L17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12z"/>
                                </Viewbox>
                                <TextBlock Grid.Row="1" Text="取消" FontSize="10" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center" Margin="0,4,0,0" Classes="button-text-label"/>
                            </Grid>
                        </Button>
                        <Button Classes="tool-btn-square"
                                Width="56"
                                Height="56"
                                Click="ResetKeystone_Click">
                            <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                                <Grid.RowDefinitions>
                                    <RowDefinition Height="*"/>
                                    <RowDefinition Height="Auto"/>
                                </Grid.RowDefinitions>
                                <Viewbox Grid.Row="0" Width="28" Height="28" HorizontalAlignment="Center">
                                    <Path Fill="#FFC107" Data="M12 5V1L7 6l5 5V7c3.31 0 6 2.69 6 6s-2.69 6-6 6-6-2.69-6-6H4c0 4.42 3.58 8 8 8s8-3.58 8-8-3.58-8-8-8z"/>
                                </Viewbox>
                                <TextBlock Grid.Row="1" Text="重置" FontSize="10" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center" Margin="0,4,0,0" Classes="button-text-label"/>
                            </Grid>
                        </Button>
                        <Grid Width="80" Height="56" Margin="8,0,0,0">
                            <Grid.RowDefinitions>
                                <RowDefinition Height="*"/>
                                <RowDefinition Height="Auto"/>
                            </Grid.RowDefinitions>
                            <ComboBox x:Name="AspectRatioDropDown"
                                      Grid.Row="0"
                                      VerticalAlignment="Center"
                                      HorizontalAlignment="Center"
                                      Width="72"
                                      Height="36"
                                      Background="{DynamicResource ThemeSurface}"
                                      CornerRadius="6">
                                <ComboBoxItem Content="自由" IsSelected="True"/>
                                <ComboBoxItem Content="A4 (1:1.414)"/>
                                <ComboBoxItem Content="B4"/>
                            </ComboBox>
                            <TextBlock Grid.Row="1" Text="比例" FontSize="10" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center" Margin="0,4,0,0" Classes="button-text-label"/>
                        </Grid>
                    </StackPanel>
                </Border>

                <!-- 中央按钮组 -->
                <Border x:Name="CenterButtonGroup"
                        Grid.Column="1" 
                        Background="{DynamicResource ThemeSurface}" 
                        Opacity="0.8"
                        CornerRadius="{DynamicResource ThemeButtonGroupCornerRadius}"
                        Padding="{DynamicResource ThemeButtonGroupPadding}"
                        HorizontalAlignment="Center"
                        VerticalAlignment="Center">
                    <Grid>
                        <Border x:Name="ToolSliderBackground"
                                Width="{DynamicResource ThemeSliderIndicatorSize}"
                                Height="{DynamicResource ThemeSliderIndicatorSize}"
                                Background="#0078D4"
                                CornerRadius="{DynamicResource ThemeSliderIndicatorCornerRadius}"
                                HorizontalAlignment="Left"
                                VerticalAlignment="Center">
                            <Border.RenderTransform>
                                <TranslateTransform X="0"/>
                            </Border.RenderTransform>
                        </Border>
                        <StackPanel Orientation="Horizontal" Spacing="0">
                            <ToggleButton x:Name="MoveBtn" 
                                          Classes="tool-btn-transparent"
                                          Width="56"
                                          Height="56"
                                          IsChecked="True"
                                          Click="MoveBtn_Click">
                                <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="*"/>
                                        <RowDefinition Height="Auto"/>
                                    </Grid.RowDefinitions>
                                    <local:SvgIcon Grid.Row="0" Width="28" Height="28" HorizontalAlignment="Center"
                                                   IconName="pointer"/>
                                    <TextBlock Grid.Row="1" Text="移动" FontSize="10" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center" Margin="0,4,0,0" Classes="button-text-label"/>
                                </Grid>
                            </ToggleButton>
                            
                            <ToggleButton x:Name="PenBtn" 
                                          Classes="tool-btn-transparent"
                                          Width="56"
                                          Height="56"
                                          Click="PenBtn_Click">
                                <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="*"/>
                                        <RowDefinition Height="Auto"/>
                                    </Grid.RowDefinitions>
                                    <local:SvgIcon Grid.Row="0" Width="28" Height="28" HorizontalAlignment="Center"
                                                   IconName="pencil"/>
                                    <TextBlock Grid.Row="1" Text="画笔" FontSize="10" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center" Margin="0,4,0,0" Classes="button-text-label"/>
                                </Grid>
                            </ToggleButton>
                            
                            <ToggleButton x:Name="EraserBtn" 
                                          Classes="tool-btn-transparent"
                                          Width="56"
                                          Height="56"
                                          Click="EraserBtn_Click">
                                <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="*"/>
                                        <RowDefinition Height="Auto"/>
                                    </Grid.RowDefinitions>
                                    <local:SvgIcon Grid.Row="0" Width="28" Height="28" HorizontalAlignment="Center"
                                                   IconName="eraser"/>
                                    <TextBlock Grid.Row="1" Text="橡皮擦" FontSize="10" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center" Margin="0,4,0,0" Classes="button-text-label"/>
                                </Grid>
                            </ToggleButton>

                            <Border Width="1" Background="{DynamicResource ThemeSurfaceVariant}" Margin="4,8"/>

                            <Button Classes="tool-btn-square"
                                    Width="56"
                                    Height="56"
                                    Click="UndoInk_Click">
                                <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="*"/>
                                        <RowDefinition Height="Auto"/>
                                    </Grid.RowDefinitions>
                                    <local:SvgIcon Grid.Row="0" Width="28" Height="28" HorizontalAlignment="Center"
                                                   IconName="undo"/>
                                    <TextBlock Grid.Row="1" Text="撤销" FontSize="10" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center" Margin="0,4,0,0" Classes="button-text-label"/>
                                </Grid>
                            </Button>
                            
                            <Button Classes="tool-btn-square"
                                    Width="56"
                                    Height="56"
                                    Click="ClearInk_Click">
                                <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="*"/>
                                        <RowDefinition Height="Auto"/>
                                    </Grid.RowDefinitions>
                                    <local:SvgIcon Grid.Row="0" Width="28" Height="28" HorizontalAlignment="Center"
                                                   IconName="trash"/>
                                    <TextBlock Grid.Row="1" Text="清屏" FontSize="10" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center" Margin="0,4,0,0" Classes="button-text-label"/>
                                </Grid>
                            </Button>

                            <Border Width="1" Background="{DynamicResource ThemeSurfaceVariant}" Margin="4,8"/>

                            <Button x:Name="CaptureBtn"
                                    Classes="tool-btn-square"
                                    Width="56"
                                    Height="56"
                                    Click="Capture_Click">
                                <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="*"/>
                                        <RowDefinition Height="Auto"/>
                                    </Grid.RowDefinitions>
                                    <local:SvgIcon Grid.Row="0" Width="28" Height="28" HorizontalAlignment="Center"
                                                   IconName="camera"/>
                                    <TextBlock Grid.Row="1" Text="拍照" FontSize="10" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center" Margin="0,4,0,0" Classes="button-text-label"/>
                                </Grid>
                            </Button>
                            
                            <Button x:Name="ScanBtn"
                                    Classes="tool-btn-square"
                                    Width="56"
                                    Height="56"
                                    Click="ScanDocument_Click">
                                <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="*"/>
                                        <RowDefinition Height="Auto"/>
                                    </Grid.RowDefinitions>
                                    <local:SvgIcon Grid.Row="0" Width="28" Height="28" HorizontalAlignment="Center"
                                                   IconName="scan"/>
                                    <TextBlock Grid.Row="1" Text="扫描" FontSize="10" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center" Margin="0,4,0,0" Classes="button-text-label"/>
                                </Grid>
                            </Button>
                            
                            <Button x:Name="VideoAdjustBtn"
                                    Classes="tool-btn-square"
                                    Width="56"
                                    Height="56"
                                    Click="VideoAdjustBtn_Click">
                                <Grid>
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="*"/>
                                        <RowDefinition Height="Auto"/>
                                    </Grid.RowDefinitions>
                                    <local:SvgIcon Grid.Row="0" Width="28" Height="28" HorizontalAlignment="Center" VerticalAlignment="Center"
                                                   IconName="adjustments"/>
                                    <TextBlock Grid.Row="1" Text="画面调节" FontSize="10" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center" Margin="0,4,0,0" Classes="button-text-label"/>
                                </Grid>
                            </Button>
                        </StackPanel>
                    </Grid>
                </Border>

                <!-- 右侧按钮组 -->
                <Border x:Name="RightButtonGroup"
                        Grid.Column="2"
                        Background="{DynamicResource ThemeSurface}" 
                        Opacity="0.8"
                        CornerRadius="{DynamicResource ThemeButtonGroupCornerRadius}"
                        Padding="{DynamicResource ThemeButtonGroupPadding}"
                        VerticalAlignment="Center"
                        HorizontalAlignment="Right">
                    <Grid>
                        <!-- 普通模式右侧按钮 -->
                        <StackPanel x:Name="NormalRightButtons"
                                    Orientation="Horizontal" 
                                    Spacing="0">
                            <Button x:Name="TogglePhotoBtn"
                                    Classes="tool-btn-square"
                                    Width="56"
                                    Height="56"
                                    Click="TogglePhotoPanel_Click">
                                <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="*"/>
                                        <RowDefinition Height="Auto"/>
                                    </Grid.RowDefinitions>
                                    <local:SvgIcon x:Name="TogglePhotoIcon" Grid.Row="0" Width="28" Height="28" HorizontalAlignment="Center"
                                                   IconName="chevron-left"/>
                                    <TextBlock x:Name="TogglePhotoLabel" Grid.Row="1" Text="展开" FontSize="10" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center" Margin="0,4,0,0" Classes="button-text-label"/>
                                </Grid>
                            </Button>
                            
                            <Button x:Name="ConnectDeviceBtn"
                                    Classes="tool-btn-square"
                                    Width="56"
                                    Height="56"
                                    Click="ConnectDeviceBtn_Click">
                                <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="*"/>
                                        <RowDefinition Height="Auto"/>
                                    </Grid.RowDefinitions>
                                    <local:SvgIcon Grid.Row="0" Width="28" Height="28" HorizontalAlignment="Center"
                                                   IconName="link"/>
                                    <TextBlock Grid.Row="1" Text="连接设备" FontSize="10" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center" Margin="0,4,0,0" Classes="button-text-label"/>
                                </Grid>
                            </Button>
                        </StackPanel>
                        
                        <!-- 白板模式右侧按钮（翻页） -->
                        <StackPanel x:Name="WhiteboardPageButtons"
                                    Orientation="Horizontal" 
                                    Spacing="4"
                                    IsVisible="False">
                            <Button x:Name="PrevPageBtn"
                                    Classes="tool-btn-square"
                                    Width="48"
                                    Height="56"
                                    Click="PrevPage_Click">
                                <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="*"/>
                                        <RowDefinition Height="Auto"/>
                                    </Grid.RowDefinitions>
                                    <local:SvgIcon Grid.Row="0" Width="24" Height="24" HorizontalAlignment="Center"
                                                   IconName="chevron-left"/>
                                    <TextBlock Grid.Row="1" Text="上一页" FontSize="9" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center" Margin="0,4,0,0" Classes="button-text-label"/>
                                </Grid>
                            </Button>
                            
                            <Border x:Name="PageInfoBorder"
                                    Width="70"
                                    Height="56"
                                    Background="Transparent"
                                    VerticalAlignment="Center"
                                    Cursor="Hand"
                                    PointerPressed="PageInfoBorder_PointerPressed">
                                <StackPanel Orientation="Vertical" HorizontalAlignment="Center" VerticalAlignment="Center">
                                    <TextBlock x:Name="PageInfoText" 
                                               Text="1/1" 
                                               FontSize="18" 
                                               FontWeight="Bold"
                                               Foreground="{DynamicResource ThemeTextPrimary}" 
                                               HorizontalAlignment="Center"/>
                                </StackPanel>
                            </Border>
                            
                            <Button x:Name="NextPageBtn"
                                    Classes="tool-btn-square"
                                    Width="48"
                                    Height="56"
                                    Click="NextPage_Click">
                                <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="*"/>
                                        <RowDefinition Height="Auto"/>
                                    </Grid.RowDefinitions>
                                    <local:SvgIcon x:Name="NextPagePath" Grid.Row="0" Width="24" Height="24" HorizontalAlignment="Center"
                                                   IconName="chevron-right"/>
                                    <TextBlock x:Name="NextPageText" Grid.Row="1" Text="下一页" FontSize="9" Foreground="{DynamicResource ThemeTextSecondary}" HorizontalAlignment="Center" Margin="0,4,0,0" Classes="button-text-label"/>
                                </Grid>
                            </Button>
                        </StackPanel>
                    </Grid>
                </Border>
            </Grid>
        </Border>

        <!-- 拖拽导入提示遮罩 -->
        <Border x:Name="DragDropOverlay"
                Background="#66000000"
                IsVisible="False"
                ZIndex="9999">
            <StackPanel HorizontalAlignment="Center"
                        VerticalAlignment="Center"
                        Spacing="8">
                <Image Source="avares://ShowWrite/ammm.png"
                       Width="300"
                       Height="300"
                       HorizontalAlignment="Center"
                       Stretch="Uniform"/>
                <TextBlock Text="松手喂给我"
                           FontSize="20"
                           FontWeight="SemiBold"
                           Foreground="White"
                           HorizontalAlignment="Center"/>
            </StackPanel>
        </Border>
    </Grid>
</Window>