CSS 响应式导航菜单栏🍌 使用纯 HTML＋CSS，写一个响应式导航。实用至上，用的时候可以再完善。代码比较简单，就

🍌代码比较简单，就直接上图上代码吧！
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

    <style>
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            text-decoration: none;
        }


        .navbar {
            background-color: #34495E;
        }

        .navbar ul {
            list-style: none;
            display: flex;
            align-items: center;
            list-style: none;
        }

        .navbar ul li a {
            display: block;
            padding: 10px 40px;
            color: white;
            text-align: center;
            transition: all 300ms ease-in-out;
        }

        .navbar ul li a:hover {
            color: #fff;
            background-color: #1ABC9C;
        }


        .navbar input#nav-toggle {
            display: none;
        }

        @media screen and (max-width: 600px) {

            .navbar {
                background-color: transparent;
            }

            .navbar ul {
                display: flex;
                flex-direction: column;
                justify-content: center;
                align-items: center;
                position: absolute;
                top: 0;
                left: -1000px;
                transition: all 200ms ease;
                background-color: #34495E;
                width: 50vw;
                height: 50vh;
            }

            .navbar input:checked~ul {
                left: 0;
            }


            /* 
            menu icon */

            label[for="nav-toggle"] {
                position: absolute;
                z-index: 1000;
                padding: 8px;
                width: 45px;
                height: 40px;
                display: flex;
                flex-direction: column;
                justify-content: space-between;
            }

            label[for="nav-toggle"] span {
                display: block;
                background-color: #1ABC9C;
                width: 100%;
                height: 4px;
                border-radius: 5px;
            }

        }
    </style>
</head>

<body>
    <header>
        <nav class="navbar">
            <input type="checkbox" title="nav-toggle" id="nav-toggle" />
            <label for="nav-toggle">
                <span></span>
                <span></span>
                <span></span>
            </label>
            <ul>
                <li><a href="#">菜单一</a></li>
                <li><a href="#">菜单二</a></li>
                <li><a href="#">菜单三</a></li>
            </ul>
        </nav>
    </header>
</body>

</html>