<nav class="navbar navbar-expand-md navbar-light bg-light fixed-top">
    <div class="container-fluid">
        <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarCollapse" aria-controls="navbarCollapse" aria-expanded="false">
            <span class="navbar-toggler-icon"></span>
        </button>
        <div class="collapse navbar-collapse" id="navbarCollapse">
            <ul class="navbar-nav">
                <li class="nav-item">
                    <a class="nav-link active" href="/">ホーム</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link active" href="/account">アカウント</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link active" href="/admin">管理者</a>
                </li>
            </ul>
        </div>
    </div>
</nav>