如何在CSS初级项目中实现Tab切换布局_Display none block与Flex结合实现流程

<div class="tab-container">
  <ul class="tab-header">
    <li class="active" data-tab="panel1">首页</li>
    <li data-tab="panel2">关于</li>
    <li data-tab="panel3">联系</li>
  </ul>

  <div class="tab-content">
    <div id="panel1" class="tab-panel active">这是首页内容</div>
    <div id="panel2" class="tab-panel">这是关于内容</div>
    <div id="panel3" class="tab-panel">这是联系内容</div>
  </div>
</div>

.tab-header {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  border-bottom: 1px solid #ddd;
}

.tab-header li {
  flex: 1;
  text-align: center;
  padding: 12px 0;
  cursor: pointer;
  background-color: #f5f5f5;
  border-right: 1px solid #ddd;
}

.tab-header li:last-child {
  border-right: none;
}

.tab-header li.active {
  background-color: #fff;
  font-weight: bold;
}

.tab-panel {
  display: none;
  padding: 20px;
  border-top: none;
}

.tab-panel.active {
  display: block;
}

document.querySelectorAll('.tab-header li').forEach(tab => {
  tab.addEventListener('click', () => {
    // 清除所有active
    document.querySelectorAll('.tab-header li').forEach(t => t.classList.remove('active'));
    document.querySelectorAll('.tab-panel').forEach(p => p.classList.remove('active'));

    // 激活当前
    tab.classList.add('active');
    const panelId = tab.getAttribute('data-tab');
    document.getElementById(panelId).classList.add('active');
  });
});