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Ví dụ về Top Navigation RUN

<!DOCTYPE html>
<html>

<head>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Freetuts.net - Hướng dẫn tạo thanh top navigation bằng HTML và CSS</title>
    <style>
        body {
            margin: 0;
            font-family: Arial, Helvetica, sans-serif;
        }

.topnav {
            overflow: hidden;
            background-color: #333;
        }

.topnav a {
            float: left;
            color: #f2f2f2;
            text-align: center;
            padding: 14px 16px;
            text-decoration: none;
            font-size: 17px;
        }

.topnav a:hover {
            background-color: #ddd;
            color: black;
        }

.topnav a.active {
            background-color: #4CAF50;
            color: white;
        }
    </style>
</head>

<body>

<div class="topnav">
        <a class="active" href="#home">Trang chủ</a>
        <a href="#news">Tin tức</a>
        <a href="#contact">Liên hệ</a>
        <a href="#about">Về chúng tôi</a>
    </div>

<div style="padding-left:16px">
        <h2>Ví dụ về Top Navigation</h2>
        <p>Nội dung..</p>
    </div>

</body>

</html>