<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width,initial-scale=1.0" />
<title>元素标签与属性</title>
</head>
<body>
<!--页眉-->
<!-- <div class="header">页眉</div> -->
<header>
<h1><header></h1>
</header>
<div class="container">
<!--边栏-->
<aside>
<h1><aside></h1>
</aside>
<!--主体区-->
<main>
<h1><main></h1>
</main>
</div>
<section>
<h1><section1></h1>
</section>
<section>
<h1><section2></h1>
</section>
<!--页脚-->
<header>
<h1>< footer ></h1>
</header>
</body>
</html>