text-align:center+inlineblock 无效
vscode里面用text-align:center+inlineblock 无效，代码如下，请问可以帮我看下问题在哪吗？
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>水平居中的布局方案1</title>
<style>
#parent {
border: 1px solid red;
border-radius: 0.5em;
width: 200px;
height: 200px； text-align: center;
}
#child {
background-color: yellow;
width: 50px;
height: 50px;
display: inline-block;
}
</style>
</head>
<body>
<!-- 1.text-align center+inline block实现 -->
<div id="parent">
<div id="child"> 123
</div>
</div>
</body>
</html>
