div css实现页面分块

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Page Blocks</title>
    <style>
        body {
            font-family: Arial, sans-serif;
        }
        .header {
            background-color: #4CAF50;
            color: white;
            padding: 15px;
            text-align: center;
        }
        .nav {
            background-color: #333;
            overflow: hidden;
        }
        .nav a {
            float: left;
            display: block;
            color: white;
            text-align: center;
            padding: 14px 16px;
            text-decoration: none;
        }
        .nav a:hover {
            background-color: #ddd;
            color: black;
        }
        .main {
            padding: 20px;
        }
        .footer {
            background-color: #333;
            color: white;
            text-align: center;
            padding: 10px;
        }
    </style>
</head>
<body>
    <div class="header">
        <h1>My Website</h1>
    </div>
    <div class="nav">
        <a href="#home">Home</a>
        <a href="#news">News</a>
        <a href="#contact">Contact</a>
        <a href="#about">About</a>
    </div>
    <div class="main">
        <h2>Welcome to My Website</h2>
        <p>This is the main content area.</p>
    </div>
    <div class="footer">
        <p>© 2023 My Website. All rights reserved.</p>
    </div>
</body>
</html>