nav.html

<nav class="navbar navbar-expand-sm bg-dark navbar-dark">
    <div class="container-fluid">
        <a href="/" class="navbar-brand">
            <img src="/static/images/sucai.png" style="width:2rem;" class="rounded-pill me-2" alt=""/>爬虫训练场</a>

        <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#collapsibleNavbar">
            <span class="navbar-toggler-icon"></span>
        </button>
        <div class="collapse navbar-collapse" id="collapsibleNavbar">
            <ul class="navbar-nav">
                <li class="nav-item">
                    <a href="#" class="nav-link">案例场</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">爬虫博客</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">社群</a>
                </li>
            </ul>
        </div>
    </div>
</nav>