Legal-assistant/legal-assistant-app/src/app/pages/learning/learning.html

<div class="learning-container">
  <!-- 顶部导航栏 -->
  <header class="learning-header">
    <button class="header-btn" (click)="goBack()">
      <i class="fas fa-arrow-left"></i>
    </button>
    <h1>法律学习</h1>
    <div class="placeholder"></div>
  </header>

  <!-- 子页面路由出口 -->
  <div class="learning-content">
    <router-outlet></router-outlet>
  </div>
</div>