<div class="container" *ngIf="!showContent">
  <button class="btn-82" (click)="startAnimation()" [@fadeAnimation] *ngIf="!showProgress">
    <span>Button</span>
  </button>
  <div class="progress-circle" *ngIf="showProgress">
    <div class="progress-value">{{ progress }}%</div>
  </div>
</div>

<div class="container" *ngIf="showContent">
  <!-- 正式页面内容 -->
  <nz-layout>
    <nz-header>Header</nz-header>
    <nz-content>Content</nz-content>
    <nz-footer>Footer</nz-footer>
  </nz-layout>
</div>
