<!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">
<span class="navbar-text">导航栏文本</span>
</div>
</nav>
<div class="container-fluid mt-3">
<h3>导航栏文本</h3>
<p>U请使用 .navbar-text 类垂直对齐导航栏中非链接的任何元素（确保正确的内边距和文本颜色）。</p>
</div>
</body>
</html>