JSFiddle - React, Tailwind, and code Playground

HTML

<label class="input-text">Name: <input class="input" type="text" placeholder="請輸入姓名" value="peter"></label>
<button class="show" onclick=show()>我要訂購</button>
<button class="about" onclick=about()>認識工廠</button>

CSS

.input-text {
  margin-bottom: 10px;
  font-size: 24px;
}

.input {
  outline: none;
  border: none;
  font-size: 24px;
  background-color: #aaa;
  color: #fff;
  border-radius: 8px;
  padding: 5px;
  font-weight: bold;
}

.input::placeholder {
  color: #fff;
}

.show, .about {
  padding: 10px;
  display: block;
  border: 0;
  background-color: #fa0;
  font-size: 24px;
  color: blue;
  font-weight: bold;
  border-radius: 10px;
  box-shadow: 5px 5px 5px #ccc;
  cursor: pointer;
}

button {
  margin-top: 20px;
}

.show:hover, .about:hover {
  transform: scale(1.2);
  color: white;
  background-color: #aaa;
}

JavaScript

function show() {	
	let name = document.querySelector('.input').value;
	const message = `${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！`;
	alert(message)
};
function about() {
	const message = `我們工廠位於新北市，通過國際 ISO9001 認證，品質讓您放心！`;
	alert(message)
}