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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"> <div class="container-fluid"> <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> </div> </nav> <div class="container-fluid mt-3"> <h3>基础的导航栏</h3> <p>导航栏是位于页面顶部的导航标题。</p> <p>navbar-expand-xxl|xl|lg|md|sm 类确定导航栏何时应垂直堆叠（在特大、超大、大、中或小屏幕上）。</p> </div> </body> </html>