HarmonyOS web组件加载url 显示为电脑网页 手机不适配

import webview from '@ohos.web.webview'; 
@Entry 
@Component 
struct Index { 
  controller: WebviewController = new webview.WebviewController(); 
  @State userAgent: string = ''; 
 
  aboutToAppear() { 
    webview.WebviewController.setWebDebuggingAccess(true); 
  } 
 
  build() { 
    Row() { 
      Column() { 
        Web({ 
          src: 'https://index.html', 
          controller: this.controller 
        }) 
          .onControllerAttached(() => { 
            this.userAgent = this.controller.getCustomUserAgent() + ' ' + 'ArkWeb/4.1.6.1'; 
            this.controller.setCustomUserAgent(this.userAgent); 
            console.log('[LOG]this.userAgent', this.userAgent); 
          }) 
          .javaScriptAccess(true) 
          .domStorageAccess(true) 
      } 
      .width('100%') 
    } 
    .height('100%') 
  } 
}