Bootstrap v5版本的HTML模板
一个基本的Bootstrap v5版本的HTML模板。这是一个非常基础的模板，包含了Bootstrap CSS和JS的引用，以及一个基本的HTML结构。
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Bootstrap v5 模板</title>
<!-- 引入 Bootstrap CSS -->
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-6l9sXXGgb5JGb5hlT/hWJLLPLW9eStAefghSJwS+CJpc33ujIW1HnIhR7aZ+6U95Ex" crossorigin="anonymous">
</head>
<body>
<div class="container">
<h1>欢迎来到我的网页</h1>
<p>这是一个基于Bootstrap v5的模板。</p>
</div>
<!-- 引入 Bootstrap JS -->
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js" integrity="sha384-w76AqPfDkMBDXo30jS1Sgez6pr3x5MlQ1ZAGC+nuZB+EYdgRZgiwxhTBTkF7CXvN" crossorigin="anonymous"></script>
</body>
</html>
这个模板中，我已经包含了Bootstrap v5的CSS和JS的CDN链接。在<div class="container">标签中，您可以添加您自己的HTML内容。
登录：
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>登录页面</title>
<!-- 引入 Bootstrap CSS -->
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-6l9sXXGgb5JGb5hlT/hWJLLPLW9eStAefghSJwS+CJpc33ujIW1HnIhR7aZ+6U95Ex" crossorigin="anonymous">
</head>
<body>
<div class="container my-5">
<div class="row justify-content-center">
<div class="col-md-6">
<h2 class="text-center mb-4">登录</h2>
<form>
<div class="mb-3">
<label for="username" class="form-label">用户名</label>
<input type="text" class="form-control" id="username" placeholder="请输入用户名" required>
</div>
<div class="mb-3">
<label for="password" class="form-label">密码</label>
<input type="password" class="form-control" id="password" placeholder="请输入密码" required>
</div>
<div class="d-grid gap-2">
<button type="submit" class="btn btn-primary">登录</button>
</div>
</form>
</div>
</div>
</div>
<!-- 引入 Bootstrap JS -->
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js" integrity="sha384-w76AqPfDkMBDXo30jS1Sgez6pr3x5MlQ1ZAGC+nuZB+EYdgRZgiwxhTBTkF7CXvN" crossorigin="anonymous"></script>
</body>
</html>
注册：
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>注册页面</title>
<!-- 引入 Bootstrap CSS -->
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-6l9sXXGgb5JGb5hlT/hWJLLPLW9eStAefghSJwS+CJpc33ujIW1HnIhR7aZ+6U95Ex" crossorigin="anonymous">
</head>
<body>
<div class="container my-5">
<div class="row justify-content-center">
<div class="col-md-6">
<h2 class="text-center mb-4">注册</h2>
<form>
<div class="mb-3">
<label for="username" class="form-label">用户名</label>
<input type="text" class="form-control" id="username" placeholder="请输入用户名" required>
</div>
<div class="mb-3">
<label for="email" class="form-label">邮箱</label>
<input type="email" class="form-control" id="email" placeholder="请输入邮箱地址" required>
</div>
<div class="mb-3">
<label for="password" class="form-label">密码</label>
<input type="password" class="form-control" id="password" placeholder="请输入密码" required>
</div>
<div class="mb-3">
<label for="confirmPassword" class="form-label">确认密码</label>
<input type="password" class="form-control" id="confirmPassword" placeholder="请再次输入密码" required>
</div>
<div class="d-grid gap-2">
<button type="submit" class="btn btn-primary">注册</button>
</div>
</form>
</div>
</div>
</div>
<!-- 引入 Bootstrap JS -->
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js" integrity="sha384-w76AqPfDkMBDXo30jS1Sgez6pr3x5MlQ1ZAGC+nuZB+EYdgRZgiwxhTBTkF7CXvN" crossorigin="anonymous"></script>
</body>
</html>
更多的Bootstrap组件或者样式，您可以参考Bootstrap的官方文档。