HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>CSS text-decoration Dotted Example</title>
  <style>
    body {
      font-family: system-ui, sans-serif;
      padding: 20px;
      background: #f8fafc;
      max-width: 640px;
      margin: 0 auto;
      line-height: 1.6;
    }

    .help-link {
      text-decoration: underline dotted #2563eb;
      color: #1e40af;
      font-weight: 600;
    }
  </style>
</head>
<body>
  <h1>Glossary Link</h1>
  <p>
    Learn about
    <a class="help-link" href="#">CSS specificity</a>
    and how selectors determine which styles apply to an element.
  </p>
</body>
</html>

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CSS text-decoration Property - Dotted Blue Underline