sourcegit/SourceGit/Resources/Styles/Button.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <!-- 无边框按钮（也是默认样式） -->
    <Style x:Key="Style.Button" TargetType="{x:Type Button}">
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="TextElement.Foreground" Value="{DynamicResource Brush.FG}"/>
        <Setter Property="Opacity" Value="0.9"/>
        <Setter Property="BorderThickness" Value="0"/>
        <Setter Property="SnapsToDevicePixels" Value="True"/>

        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type Button}">
                    <Border Background="{TemplateBinding Background}"
                            BorderBrush="{TemplateBinding BorderBrush}" 
                            BorderThickness="{TemplateBinding BorderThickness}"
                            Padding="{TemplateBinding Padding}">
                        <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>

        <Style.Triggers>
            <Trigger Property="IsMouseOver" Value="True">
                <Setter Property="Opacity" Value="1"/>
            </Trigger>
        </Style.Triggers>
    </Style>

    <!-- 修改默认样式 -->
    <Style TargetType="{x:Type Button}" BasedOn="{StaticResource Style.Button}"/>
    
    <!-- 无边框但显示Hover -->
    <Style x:Key="Style.Button.HighlightHover" BasedOn="{StaticResource Style.Button}" TargetType="{x:Type Button}">
        <Style.Triggers>
            <Trigger Property="IsMouseOver" Value="True">
                <Setter Property="Background" Value="#40000000"/>
            </Trigger>
        </Style.Triggers>
    </Style>
    
    <!-- 有边框 -->
    <Style x:Key="Style.Button.Bordered" BasedOn="{StaticResource Style.Button}" TargetType="{x:Type Button}">
        <Setter Property="BorderBrush" Value="{DynamicResource Brush.Border1}"/>
        <Setter Property="BorderThickness" Value="1"/>
        <Setter Property="Padding" Value="8,0"/>
    </Style>
    <Style x:Key="Style.Button.AccentBordered" BasedOn="{StaticResource Style.Button}" TargetType="{x:Type Button}">
        <Setter Property="Background" Value="{DynamicResource Brush.Accent1}"/>
        <Setter Property="BorderBrush" Value="{DynamicResource Brush.FG}"/>
        <Setter Property="BorderThickness" Value="1"/>
        <Setter Property="Padding" Value="8,0"/>
    </Style>
</ResourceDictionary>