js左侧浮动导航菜单

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>左侧浮动导航菜单</title>
    <style>
        body {
            margin: 0;
            font-family: Arial, sans-serif;
        }
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 200px;
            height: 100%;
            background-color: #333;
            padding: 20px;
        }
        .sidebar a {
            display: block;
            color: white;
            text-decoration: none;
            padding: 10px 0;
        }
        .sidebar a:hover {
            background-color: #555;
        }
        .content {
            margin-left: 220px;
            padding: 20px;
        }
    </style>
</head>
<body>
    <div class="sidebar">
        <a href="#home">首页</a>
        <a href="#services">服务</a>
        <a href="#about">关于我们</a>
        <a href="#contact">联系我们</a>
    </div>
    <div class="content">
        <h1>欢迎来到我们的网站</h1>
        <p>这里是主要内容区域。</p>
    </div>
</body>
</html>

.content {
    margin-left: 220px; /* 菜单宽度 + 一些额外的空间 */
    padding: 20px;
}

@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        position: relative;
    }
    .content {
        margin-left: 0;
    }
}