<!DOCTYPE html>
<html>
<head><title>Attributes Test</title></head>
<body>
<p class="intro" id="p1" data-tracking="abc123">First paragraph.</p>
<a href="https://example.com/page?utm_source=email&campaign=spring" style="color: blue;">Click here</a>
<img src="https://cdn.example.com/img.png" alt="Descriptive alt text" width="200" />
<div style="background: url('https://example.com/bg.jpg'); padding: 10px;">
<span class="highlight" data-tooltip="Important info">Styled content</span>
</div>
</body>
</html>