我的代码一直存在问题，我希望文本位于中心，但不管我做什么，它都不会去那里。我添加了一条注释，指出我想要居中的文本的位置。任何帮助表示赞赏。
<!DOCTYPE html>
<html lang="en" class="no-js">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Mix Pics</title>
<meta name="description" content="A photography-inspired website layout with an expanding stack slider and a background image tilt effect" />
<meta name="keywords" content="photography, template, layout, effect, expand, image stack, animation, flickity, tilt" />
<meta name="author" content="Codrops" />
<link rel="shortcut icon" href="favicon.ico">
<link rel="stylesheet" type="text/css" href="css/normalize.css" />
<link rel="stylesheet" type="text/css" href="css/flickity.css" />
<link rel="stylesheet" type="text/css" href="css/main.css" />
<script src="js/modernizr.custom.js"></script>
</head>
<body>
<div class="container">
<div class="hero">
<div class="hero__back hero__back--static"></div>
<div class="hero__back hero__back--mover"></div>
<div class="hero__front"></div>
</div>
<header class="codrops-header">
<div class="codrops-links">
<a class="codrops-icon codrops-icon--prev" href="index.html" title="Home Page"><span>Home Page</span></a>
<a class="codrops-icon codrops-icon--drop" href="index.html" title="Home Page"><span>Home Page</span></a>
</div>
<h1 class="codrops-title">Mix <span>Pics</span></h1>
<div align="center">
<h3>About</h3> <!-- This text for some reason is in the top right hand corner, not the centre. -->
</div>
</body>