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<header>
<h1>Welcome to the Encyclopedia</h1>
<p>Your go-to source for comprehensive knowledge</p>
</header>
<nav>
<a href="#">Home</a>
<a href="#categories">Categories</a>
<a href="#articles">Popular Articles</a>
<a href="#about">About</a>
</nav>
<div class="search-bar">
<input type="text" placeholder="Search articles...">
<button>Search</button>
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<section id="categories" class="categories">
<h2>Categories</h2>
<ul>
<li><a href="#">Science</a></li>
<li><a href="#">Technology</a></li>
<li><a href="#">History</a></li>
<li><a href="#">Geography</a></li>
<li><a href="#">Culture</a></li>
</ul>
</section>
<section id="articles" class="articles">
<h2>Featured Articles</h2>
<ul>
<li><a href="#">The Wonders of Space Exploration</a></li>
<li><a href="#">The Rise and Fall of Ancient Civilizations</a></li>
<li><a href="#">Understanding Quantum Mechanics</a></li>
<li><a href="#">The Impact of AI on Modern Society</a></li>
<li><a href="#">World's Most Breathtaking Landscapes</a></li>
</ul>
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<img src="https://via.placeholder.com/300" alt="Space Exploration">
<h3>The Wonders of Space Exploration</h3>
<p>Discover the mysteries of the universe and the advances in space technology that bring us closer to the stars.</p>
<a href="#">Read More</a>
</div>
<div class="featured-item">
<img src="https://via.placeholder.com/300" alt="Ancient Civilizations">
<h3>The Rise and Fall of Ancient Civilizations</h3>
<p>Explore the history of ancient empires and their lasting impact on the modern world.</p>
<a href="#">Read More</a>
</div>
<div class="featured-item">
<img src="https://via.placeholder.com/300" alt="Quantum Mechanics">
<h3>Understanding Quantum Mechanics</h3>
<p>Dive into the complex and fascinating world of quantum physics and its real-world applications.</p>
<a href="#">Read More</a>
</div>
</section>
<section id="about" class="about">
<h2>About This Encyclopedia</h2>
<p>This online encyclopedia is dedicated to providing reliable and well-researched information on a wide range of topics. From science and technology to history and culture, we aim to empower curious minds with knowledge.</p>
<p>Our content is curated by experts and enthusiasts from around the world, ensuring a comprehensive and engaging learning experience for all users.</p>
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<p>© 2025 Encyclopedia. All rights reserved.</p>
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