I"<section class="hero">
  <h1>Welcome to <span>src</span></h1>
  <div class="hero-buttons">
    <a href="#" class="btn btn-primary" id="downloadBtn">Download Now</a>
    <a href="/docs/getting-started/" class="btn btn-secondary">Documentation</a>
  </div>
</section>

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  var btn = document.getElementById('downloadBtn');
  if (!btn) return;
  var ua = navigator.userAgent;
  if (/Mac/i.test(ua)) {
    btn.textContent = 'Download for macOS';
    btn.href = '#download-macos';
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    btn.href = '#download-windows';
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    btn.href = '#download-linux';
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<section class="features">
  <div class="features-col">
    <h2>Features</h2>

    <div class="feature-group">
      <h3>Fast</h3>
      <ul>
        <li>Blazing fast performance out of the box</li>
        <li>Zero-config setup to get started in seconds</li>
      </ul>
    </div>

    <div class="feature-group">
      <h3>Flexible</h3>
      <ul>
        <li>Works with your existing tools and workflows</li>
        <li>Deploy anywhere you want</li>
      </ul>
    </div>
  </div>

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    <div class="video-placeholder" style="width:100%;aspect-ratio:16/9;background:#262637;border:2px dashed #3a3a52;border-radius:12px;display:flex;align-items:center;justify-content:center;color:#9399b2;">
      Replace with your video embed
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  </div>
</section>
:ET