zkxw/docs/panel-tab-demos/01-underline-default.html

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    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>01 下划线默认 · Tab Demo</title>
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    <link rel="stylesheet" href="_shared.css" />
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  <body>
    <header class="demo-banner">
      <div>
        <h1><span class="demo-badge">01 下划线默认</span> 质检物料库 · Tab 样式 Demo</h1>
        <p>接近 Element Plus 默认 Tab，底边绿线 · 改动最小</p>
      </div>
      <div class="demo-banner__actions">
        <a href="index.html">← 选型索引</a>
        <a href="02-pill-segmented.html">02 胶囊</a>
        <a href="05-bar-accent.html">05 竖条</a>
      </div>
    </header>

    <div class="page-wrap">
      <section class="panel" id="panel-root">
        <div class="panel-top"><h2>质检物料库</h2></div>
        <div class="panel-tab-zone">
          <nav class="tabs-01" role="tablist">
            <button type="button" class="tab-btn is-active" data-tab="list" role="tab">物料列表</button>
            <button type="button" class="tab-btn" data-tab="usage" role="tab">变动记录</button>
            <button type="button" class="tab-btn" data-tab="stockCheck" role="tab">库存盘点</button>
          </nav>
        </div>
        <div class="tab-panel is-active" data-panel="list" id="content"></div>
      </section>
      <p class="style-note"><strong>适用场景：</strong>与全站其他 <code>panel-tabs</code> 保持一致；若只想微调间距/字重，选此方案。</p>
    </div>

    <script src="_demo-shell.js"></script>
    <script>
      document.getElementById('content').innerHTML = mockContent('list')
      initPanelTabs('panel-root')
    </script>
  </body>
</html>