JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=
    , initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="/index.css">
    <link rel="preconnect" href="https://fonts.googleapis.com">
    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
    <link href="https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@100;400&display=swap" rel="stylesheet">
</head>

<body>
    <div class="order">
        <h1 class="h1tag">- ONLINE ORDER -</h1>
        <div class='name'>
            <label for="">姓名　</label>
            <input id='name' type="text" placeholder="請輸入姓名..." required>
        </div>

        <div class='card'>
            <button onclick="myFunction()">我要訂購</button>
            <button onclick="myFactory()">認識工廠</button>
        </div>
    </div>
    <script src="/index.js"></script>
</body>

</html>

CSS

* {
    padding: 0;
    margin: 0;
    background: lightblue;
    font-family: 'Noto Sans TC', sans-serif;

}

.h1tag {
    margin-top: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.name {
    margin-top: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

.name>input {
    border: 0;
    border-radius: 50px;
    padding: 2px 10px;
    background-color: white;
}

.card {

    display: flex;
    align-items: center;
    justify-content: center;
}

button {
    margin: 20px;
    width: 150px;
    padding: 10px;
    background: lightgray;
    color: white;
    border-radius: 50px;
    border: 2px solid gray;
}

button:hover {
    background: white;
    color: lightblue;
    border: 2px dashed lightblue;
    font-weight: 800;
}

JavaScript

function myFunction() {
    var name = document.getElementById('name').value;
    alert(name + '您好！!謝謝您對我們的衣服有興趣！請致電 0987-654-321，會有專人提供您報價！');
}

function myFactory() {
    var name = document.getElementById('name').value;
    alert(name + '您好！!我們工廠位於新北市，通過國際 ISO9001 認證，品質讓您放心！');
}