举一个有关accessibility(可达性)的例子，回答格式要求：用html形式写出，head部分要带有title，样式可以用css在前三个style标签中定义，页面主体有两部分：第一个是h1的部分标题，第二个是关于文件可达性的详细内容的具体文字信息部分会有一个p标签，描述具体的情况，p标签中需要用到strong标签表示关键信息。需要提供页面全部的内容。
user
```html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Accessibility Example</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            background-color: #f4f4f4;
            color: #333;
            margin: 0;
            padding: 20px;
        }
        h1 {
            color: #0056b3;
            text-align: center;
        }
        p {
            font-size: 16px;
            line-height: 1.6;
            margin-top: 20px;
        }
        strong {
            color: #d9534f;
        }
    </style>
</head>
<body>
    <h1>Web Accessibility</h1>
    <p>Web accessibility refers to the practice of making websites usable by people of all abilities. This includes individuals with <strong>visual impairments</strong>, <strong>hearing impairments</strong>, and other disabilities. By implementing accessibility features, such as alt text for images and keyboard navigation, we ensure that everyone can access and enjoy digital content.</p>
</body>
</html>
```
assistant