<!DOCTYPE html>  
<html lang="zh">  
<head>  
<meta charset="UTF-8">  
<meta name="viewport" content="width=device-width, initial-scale=1.0">  
<title>首页</title>  
</head>  
<body style="width: 100%; height: 100%; margin: 0; padding: 0; display: flex; justify-content: center; align-items: center;">  
<h1>欢迎来到我的网站</h1>  
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</body>  
</html>