<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap 实例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<nav class="navbar navbar-expand-sm bg-dark navbar-dark">
<div class="container-fluid">
<a class="navbar-brand" href="#">
<img src="/i/css/avatar.png" alt="Logo" style="width:40px;" class="rounded-pill">
</a>
</div>
</nav>
<div class="container-fluid mt-3">
<h3>品牌 / 标志</h3>
<p>如果将 .navbar-brand 类与图像一起使用时，Bootstrap 5 将自动设置图像样式，在垂直方向适应导航栏。</p>
</div>
</body>
</html>