Default style got lost when applying custom styles to SettingsExpander items

[NotYoojun]

Original Posted by: QQ 2492527689. Here's what he did:

边缘和对齐好像都有问题

His code below:

<ui:SettingsExpander Header="{lex:Loc TargetFiletype}" IsExpanded="True">
    <ComboBox ItemsSource="{StaticResource FileTypeArray}" SelectedValue="{Binding W3Job.FileType}" />
    <ui:SettingsExpander.Items>
        <ui:SettingsCard Header="{lex:Loc TargetLanguage}">
            <ComboBox ItemsSource="{StaticResource W3LanguageArray}" SelectedValue="{Binding W3Job.Language}" />
        </ui:SettingsCard>
        <ui:SettingsCard Header="{lex:Loc IgnoreIDSpaceCheck}">
            <ui:SettingsCard.Style>
                <Style TargetType="ui:SettingsCard">
                    <Setter Property="Visibility" Value="Visible" />
                    <Style.Triggers>
                        <DataTrigger Binding="{Binding W3Job.FileType}" Value="{x:Static c:FileType.csv}">
                            <Setter Property="Visibility" Value="Collapsed" />
                        </DataTrigger>
                    </Style.Triggers>
                </Style>
            </ui:SettingsCard.Style>
            <ui:ToggleSwitch
                x:Name="IgnoreIdSpaceCheckSwitch"
                IsOn="{Binding W3Job.IsIgnoreIdSpaceCheck}"
                OffContent="{lex:Loc IsOff}"
                OnContent="{lex:Loc IsOn}" />
        </ui:SettingsCard>
        <ui:SettingsCard Header="{lex:Loc IDSpace}">
            <ui:SettingsCard.Style>
                <Style TargetType="ui:SettingsCard">
                    <Setter Property="Visibility" Value="Visible" />
                    <Style.Triggers>
                        <DataTrigger Binding="{Binding W3Job.FileType}" Value="{x:Static c:FileType.csv}">
                            <Setter Property="Visibility" Value="Collapsed" />
                        </DataTrigger>
                        <DataTrigger Binding="{Binding W3Job.IsIgnoreIdSpaceCheck}" Value="True">
                            <Setter Property="Visibility" Value="Collapsed" />
                        </DataTrigger>
                    </Style.Triggers>
                </Style>
            </ui:SettingsCard.Style>
            <ui:NumberBox
                MinWidth="0"
                Maximum="9999"
                Minimum="-1"
                SmallChange="1"
                SpinButtonPlacementMode="Inline"
                Value="{Binding W3Job.IdSpace}" />
        </ui:SettingsCard>
    </ui:SettingsExpander.Items>
</ui:SettingsExpander>

[ssc19940105]

1.The default style disappears when a trigger is applied to modify the style. You also can't base on the default style in the trigger style.
2.In addition to the issue of styles disappearing, there is an issue with the edges between item items inside the SettingsExpander