用python django做web项目，导入bootstrap4后导航栏排版不正常

问题遇到的现象和发生背景

使用《Python 编程从入门到实践第二版》的源码,导航栏的排版不正常

问题相关代码，请勿粘贴截图

base页面的代码

{% load bootstrap4 %}

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1,
    shrink-to-fit=no">
  <title>Learning Log</title>

  {% bootstrap_css %}
  {% bootstrap_javascript jquery='full' %}
  <!-- Bootstrap core CSS -->
  <link href="/static/bootstrap/css/bootstrap.css" rel="stylesheet">
  <link href="/static/bootstrap/css/blog.css" rel="stylesheet">

</head>
<body>

  <nav class="navbar navbar-expand-md navbar-light bg-light mb-4 border">

    <a class="navbar-brand" href="{% url 'learning_logs:index'%}">
        Learning Log</a>

    <button class="navbar-toggler" type="button" data-toggle="collapse"
        data-target="#navbarCollapse" aria-controls="navbarCollapse"
        aria-expanded="false" aria-label="Toggle navigation">
      <span class="navbar-toggler-icon"></span></button>
    <div class="collapse navbar-collapse" id="navbarCollapse">
      <ul class="navbar-nav mr-auto">
        <li class="nav-item">
          <a class="nav-link" href="{% url 'learning_logs:topics'%}">
              Topics</a></li>
      </ul>
      <ul class="navbar-nav ml-auto">
        {% if user.is_authenticated %}
          <li class="nav-item">
            <span class="navbar-text"}>Hello, {{ user.username }}.</span>
          </li>
          <li class="nav-item">
            <a class="nav-link" href="{% url 'users:logout' %}">Log out</a>
          </li>
        {% else %}
          <li class="nav-item">
            <a class="nav-link" href="{% url 'users:register' %}">Register</a>
          </li>
          <li class="nav-item">
            <a class="nav-link" href="{% url 'users:login' %}">Log in</a></li>
        {% endif %}
      </ul>
    </div>

  </nav>

  <main role="main" class="container">
    <div class="pb-2 mb-2 border-bottom">
      {% block page_header %}{% endblock page_header %}
    </div>
    <div>
      {% block content %}{% endblock content %}
    </div>
  </main>

  <script src="/static/bootstrap/js/bootstrap.js"></script>
  
</body>

</html>

我的解答思路和尝试过的方法

有根据 https://blog.csdn.net/grfstc/article/details/124581471?utm_source=app&app_version=5.3.0 这篇博客修改settings.py和base页面。

我想要达到的结果

导航栏排版显示正常