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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-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>