wpf中为什么按钮移动上去动画变大，下面的倒影不放大
<Window x:Class="TEST.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="500" Width="700">
<Window.Resources>
<Style x:Key="buttonType" TargetType="Button">
<Style.Triggers>
<Trigger Property="IsPressed" Value="true">
<Setter Property = "Foreground" Value="Green"/>
<Setter Property = "Height" Value="100"/>
</Trigger>
<EventTrigger RoutedEvent="Button.MouseEnter">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetProperty="LayoutTransform.(ScaleTransform.ScaleX)" To="1.3"
Duration="0:0:0.1" />
<DoubleAnimation Storyboard.TargetProperty="LayoutTransform.(ScaleTransform.ScaleY)" To="1.3"
Duration="0:0:0.1" />
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
<EventTrigger RoutedEvent="Button.MouseLeave">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetProperty="LayoutTransform.(ScaleTransform.ScaleX)" Duration="0:0:0.1" />
<DoubleAnimation Storyboard.TargetProperty="LayoutTransform.(ScaleTransform.ScaleY)" Duration="0:0:0.1" />
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
</Style.Triggers>
<Setter Property="Height" Value="50"></Setter>
<Setter Property="Width" Value="50"></Setter>
<Setter Property="LayoutTransform">
<Setter.Value>
<ScaleTransform ScaleX="1" ScaleY="1" />
</Setter.Value>
</Setter>
<Setter Property="RenderTransformOrigin" Value="0.5,1" />
</Style>
</Window.Resources>
<Grid Height="300" Width="500">
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Button Style="{StaticResource buttonType}" x:Name="btn" Content="Button" HorizontalAlignment="Center" VerticalAlignment="Bottom" >
</Button>
<Rectangle Grid.Row="1" Opacity="0.7" Height="{Binding ElementName=btn, Path=ActualHeight}"
Width="{Binding ElementName=btn, Path=ActualWidth}">
<Rectangle.Fill>
<VisualBrush Visual="{Binding ElementName=btn}"/>
</Rectangle.Fill>
<Rectangle.LayoutTransform>
<ScaleTransform ScaleY="-0.7"/>
</Rectangle.LayoutTransform>
<Rectangle.OpacityMask>
<LinearGradientBrush EndPoint="0,1">
<GradientStop Offset="0" Color="Transparent"/>
<GradientStop Offset="1" Color="#77000000"/>
</LinearGradientBrush>
</Rectangle.OpacityMask>
</Rectangle>
</Grid>
</Window>
Duration="0:0:0.1" />
<DoubleAnimation Storyboard.TargetProperty="LayoutTransform.(ScaleTransform.ScaleY)" To="1.3"
Duration="0:0:0.1" />
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
<EventTrigger RoutedEvent="Button.MouseLeave">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetProperty="LayoutTransform.(ScaleTransform.ScaleX)" Duration="0:0:0.1" />
<DoubleAnimation Storyboard.TargetProperty="LayoutTransform.(ScaleTransform.ScaleY)" Duration="0:0:0.1" />
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
</Style.Triggers>
<Setter Property="Height" Value="50"></Setter>
<Setter Property="Width" Value="50"></Setter>
<Setter Property="LayoutTransform">
<Setter.Value>
<ScaleTransform ScaleX="1" ScaleY="1" />
</Setter.Value>
</Setter>
<Setter Property="RenderTransformOrigin" Value="0.5,1" />
</Style>
</Window.Resources>
<Grid Height="300" Width="500">
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Button Style="{StaticResource buttonType}" x:Name="btn" Content="Button" HorizontalAlignment="Center" VerticalAlignment="Bottom" >
</Button>
<Rectangle Grid.Row="1" Opacity="0.7" Name="aa" Height="{Binding ElementName=btn, Path=ActualHeight}"
Width="{Binding ElementName=btn, Path=ActualWidth}">
<Rectangle.Fill>
<VisualBrush Visual="{Binding ElementName=btn}"/>
</Rectangle.Fill>
<Rectangle.LayoutTransform>
<ScaleTransform ScaleY="{Binding ElementName=btn, Path=LayoutTransform.(ScaleTransform.ScaleY)}"
ScaleX="{Binding ElementName=btn, Path=LayoutTransform.(ScaleTransform.ScaleX)}"/>
</Rectangle.LayoutTransform>
<Rectangle.OpacityMask>
<LinearGradientBrush EndPoint="0,1">
<GradientStop Offset="0" Color="#77000000"/>
<GradientStop Offset="1" Color="Transparent"/>
</LinearGradientBrush>
</Rectangle.OpacityMask>
</Rectangle>
</Grid>
