css-slide index

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <link href="common/css/style.css" rel="stylesheet">
</head>
<body>

    <section id="visual">
        <label for="s1">1</label>
        <input type="radio" name="btn" id="s1" checked>
        <label for="s2">1</label>
        <input type="radio" name="btn" id="s2">
        <label for="s3">1</label>
        <input type="radio" name="btn" id="s3">
        <label for="s4">1</label>
        <input type="radio" name="btn" id="s4">
        <ul class="imgslide">
            <li></li>
            <li></li>
            <li></li>
            <li></li>
        </ul>
    </section>

</body>
</html>