<div class="app-collapse-panel">
  <div class="app-collapse-panel-header">
    <i nz-icon nzType="right" class="app-collapse-panel-arrow" [ngClass]="{'app-collapse-panel-arrow-down': nzActive}"></i>
    {{nzHeader}}
  </div>
  <div class="app-collapse-panel-box" [ngClass]="{'app-collapse-panel-box--hidden': !nzActive}">
    <div class="app-collapse-panel-boxItem">
      <ng-content></ng-content>
    </div>
  </div>
</div>
