帮我生成一个好看简洁的H5提示html源码

<!DOCTYPE html>
<html>
<head>
  <title>简洁的H5提示</title>
  <style>
    body {
      font-family: Arial, sans-serif;
      background-color: #f0f0f0;
    }
<pre><code>.container {
  width: 300px;
  margin: 100px auto;
  padding: 20px;
  background-color: #fff;
  border-radius: 5px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

h1 {
  font-size: 24px;
  color: #333;
  margin-bottom: 20px;
  text-align: center;
}

p {
  font-size: 16px;
  color: #666;
  text-align: center;
}

button {
  display: block;
  width: 100px;
  margin: 20px auto;
  padding: 10px;
  background-color: #4CAF50;
  color: #fff;
  font-size: 14px;
  border: none;
  border-radius: 3px;
  cursor: pointer;
}

button:hover {
  background-color: #45a049;
}
</code></pre>
  </style>
</head>
<body>
  <div class="container">
    <h1>简洁的H5提示</h1>
    <p>这是一个简洁的H5提示页面。</p>
    <button onclick="alert('Hello!')">点击我</button>
  </div>
</body>
</html