Hallo Gunnar,
vielen dank für deine Verbesserungen. Ich habe es geändert, passt es nun?
<!DOCTYPE html>
<html lang="de">
<head>
<meta charset="utf-8">
<title>Titel der Seite</title>
<link rel="stylesheet" href="css/design.css">
<!--[if lt IE 9]>
<script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
</head>
<body>
<header>
<h1>Titel der Seite</h1>
<img src="img/design/logo.png" alt="Logo" class="logo">
<nav>
<ul>
<li><a href="#">Test 1</a></li>
<li><a href="#">Test 2</a></li>
<li><a href="#">Test 3</a></li>
<li><a href="#">Test 4</a></li>
<li><a href="#">Test 5</a></li>
</ul>
</nav>
</header>
<main role="main">
<address class="phone">
<p>Nummer</p>
<p>Mail Adresse</p>
</address>
<section>
<h2>Titel</h2>
<p>Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.</p>
<figure class="einzel">
<figcaption>Bild 1</figcaption>
<img src="img/1.jpg" alt="Bild 1" />
</figure>
<figure class="einzel">
<figcaption>Bild 2</figcaption>
<img src="img/2.jpg" alt="Bild 2" />
</figure>
</section>
<footer>
<p>© 2015</p>
</footer>
</main>
</body>
</html>