feat:优化启动广告底部logo展示

@@ -138,10 +138,12 @@ struct LaunchAdvertisingPage {
                 })
               }
               if(this.defaultModel.screenType === '1') {
+                Column(){
                   Image($r('app.media.LaunchPage_logo'))
                     .width('278lpx')
                     .height('154lpx')
-                  .margin({top: '28lpx',bottom:'28lpx'})
+                    .margin({top:20})
+                }.width('100%').height('16%').backgroundColor(Color.White).expandSafeArea([SafeAreaType.SYSTEM], [SafeAreaEdge.TOP, SafeAreaEdge.BOTTOM])
               }
             }
             .width('100%')