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<!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-light justify-content-center"> <ul class="navbar-nav"> <li class="nav-item"> <a class="nav-link" href="#">链接 1</a> </li> <li class="nav-item"> <a class="nav-link" href="#">链接 2</a> </li> <li class="nav-item"> <a class="nav-link" href="#">链接 3</a> </li> </ul> </nav> <div class="container-fluid mt-3"> <h3>居中的导航栏</h3> <p>请使用 .justify-content-center 类将导航栏居中。</p> <p>在这个例子中，导航栏将在中、大和超大屏幕上居中。在小屏幕上，它将垂直和左对齐显示（由于 .navbar-expand-sm 类）。</p> </div> </body> </html>