梁晨轩关于界面的html代码

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>关于</title>
    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons/font/bootstrap-icons.css" rel="stylesheet">

    <meta name="color-scheme" content="light dark">
    <script type="fae97e01bab9410baa7c74b8-text/javascript">
        const isDark = window.matchMedia('(prefers-color-scheme: dark)').matches;
        document.documentElement.setAttribute('data-bs-theme', isDark ? 'dark' : 'light');
    </script>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/github-markdown-css/5.8.1/github-markdown.css" integrity="sha512-Hasfm7Iv5AG2/v5DSRXetpC33VjyPBXn5giooMag2EgSbiJ2Xp4GGvYGKSvc68SiJIflF/WrbDFdNmtlZHE5HA==" crossorigin="anonymous" referrerpolicy="no-referrer" />

    <script id="MathJax-script" async src="https://cdn.jsdelivr.net/npm/mathjax@4/tex-mml-chtml.js" type="fae97e01bab9410baa7c74b8-text/javascript"></script>

    <link href="https://cdn.jsdelivr.net.cn/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-QWTKZyjpPEjISv5WaRU9OFeRpok6YctnYmDr5pNlyT2bRjXh0JMhjY6hW+ALEwIH" crossorigin="anonymous">

    <style>
        .markdown-body {
            box-sizing: border-box;
            min-width: 200px;
            max-width: 980px;
            margin: 0 auto;
            padding: 45px;
        }

        @media (max-width: 767px) {
            .markdown-body {
                padding: 15px;
            }
        }


            @media (prefers-color-scheme: dark) {
                body {
                    background-color: #0d1117;
                }
            }
    </style>
</head>
<body>
    <nav class="navbar navbar-expand-lg">
        <div class="container-fluid">
            <a class="navbar-brand" href="/">
                <i class="bi bi-chat-left"></i> <span>Lean Forum</span>
            </a>
            <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="切换导航">
                <span class="navbar-toggler-icon"></span>
            </button>
            <div class="collapse navbar-collapse" id="navbarNav">
                <ul class="navbar-nav">
                    <li class="nav-item">
                        <a class="nav-link active" href="/">首页</a>
                    </li>

                    <li class="nav-item">
                        <a class="nav-link" href="/posts/">所有文章</a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link" href="/about/">关于</a>
                    </li>
                </ul>
            </div>


            <div class="nav-item dropdown ms-auto">
                <a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown" aria-expanded="false">
                    <i class="bi bi-person-circle"></i> <span>Tangym</span>
                </a>
                <ul class="dropdown-menu dropdown-menu-end">
                    <li>
                        <form action="/logout/" method="post" class="w-100">
                            <input type="hidden" name="csrfmiddlewaretoken" value="IuYN2EP6nI6WIA9ZGzJfZFXpcZG6rvlCoRO4z6Q1fHh9SQtFmmFdx2HwjUMsNYrB">
                            <button type="submit" class="dropdown-item">登出</button>
                        </form>
                    </li>
                </ul>
            </div>

        </div>
    </nav>

    <div class="container mt-4">


<h1 class="mt-5">关于我们的论坛(Lean forum)</h1>
<p class="lead">一个简单但多样的论坛</p>

<h3>论坛规则</h3>
<ul>
    <li>尊重他人，避免恶意攻击。</li>
    <li>请勿发布违法或违规内容。</li>
    <li>遵守具体规定，维护社区秩序。</li>
</ul>

<h3>相关信息</h3>
<p>你可以在下列地方联系维护者或查看源代码</p>
<ul>
    <li>Github: <a href="https://github.com/aba2222/lean_forum">github.com/aba2222/lean_forum</a></li>
</ul>

<h3>感谢您的支持</h3>
<p>我们非常感谢每一位用户对论坛的支持和参与！</p>


    </div>
    <script src="https://cdn.jsdelivr.net.cn/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-YvpcrYf0tY3lHB60NNkmXc5s9fDVZLESaAA55NDzOxhy9GkcIdslK1eN7N6jIeHz" crossorigin="anonymous" type="fae97e01bab9410baa7c74b8-text/javascript"></script>


    <script type="fae97e01bab9410baa7c74b8-text/javascript">
        const themeQuery = window.matchMedia('(prefers-color-scheme: dark)');
        const setTheme = () => document.documentElement.setAttribute(
            'data-bs-theme',
            themeQuery.matches ? 'dark' : 'light'
        );

        themeQuery.addEventListener('change', setTheme);
    </script>
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</body>
</html>

代码在上面，自己看

纯前端是何意味？ 论坛代码在github上开源了，你这又是何意味？