将button样式上下左右居中在div class=call-to-action中间 请将样式代码插到下面页面中!doctype htmlhtml lang=zh-CN head meta charset=utf-8 meta name=viewport content=width=device-width initial-scale=1 title无涯openAititle

<p>将以下代码插入到<style>标签中：</p>
<p>.call-to-action {
display: flex;
flex-direction: row;
justify-content: center;
align-items: center;
margin-top: 20px;
}</p>
<p>.call-to-action button {
margin: 0 10px;
}</p>
<p>其中，.call-to-action样式用于将按钮水平居中，justify-content: center;属性实现。align-items: center;属性用于将按钮垂直居中。同时，通过将按钮margin设置为0 10px来实现按钮之间的间距。</p>