refactor: 更改样式

Author: ArgoZhang

src/BootstrapBlazor/Components/Radio/RadioList.razor.cs

@@ -46,7 +46,8 @@ public partial class RadioList<TValue>
         .Build();
 
     private string? GetButtonItemClassString(SelectedItem item) => CssBuilder.Default("btn")
-        .AddClass($"active bg-{Color.ToDescriptionString()}", CurrentValueAsString == item.Value)
+        .AddClass($"btn-outline-{Color.ToDescriptionString()}")
+        .AddClass("active", CurrentValueAsString == item.Value)
         .Build();
 
     /// <summary>

src/BootstrapBlazor/Components/Radio/RadioList.razor.scss

@@ -24,7 +24,6 @@
     }
 
     &.btn-group {
-        border: var(--bs-border-width) solid var(--bs-border-color);
         display: inline-flex;
         flex: 0 !important;
         flex-wrap: nowrap;