jquery导航特效代码

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>jQuery 导航特效</title>
    <style>
        .nav {
            list-style: none;
            padding: 0;
        }
        .nav li {
            display: inline-block;
            margin-right: 10px;
        }
        .sub-menu {
            display: none;
            list-style: none;
            padding: 0;
            position: absolute;
            background-color: #fff;
            border: 1px solid #ccc;
        }
    </style>
</head>
<body>
    <ul class="nav">
        <li><a href="#">Home</a></li>
        <li>
            <a href="#">Services</a>
            <ul class="sub-menu">
                <li><a href="#">Web Design</a></li>
                <li><a href="#">SEO</a></li>
                <li><a href="#">Marketing</a></li>
            </ul>
        </li>
        <li><a href="#">About</a></li>
        <li><a href="#">Contact</a></li>
    </ul>

    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
    <script>
        $(document).ready(function() {
            $('.nav > li').hover(
                function() {
                    $(this).find('.sub-menu').slideDown(200);
                },
                function() {
                    $(this).find('.sub-menu').slideUp(200);
                }
            );
        });
    </script>
</body>
</html>