因此，我一直在尝试使标题响应，但它似乎根本不起作用。任何帮助都很好。
<!DOCTYPE html>
<html lang="en">
<head>
<meta name="viewport" content="width=device-width">
</head>
<body>
<h2>This is just a test page that does not work on three tested devices any help would be nice.</h2>
</body>
</html>
您可以使用引导头，它将为您完成。
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>
</head>
引导程序对于创建网站非常有用：https://www.w3schools.com/bootstrap/default.asp