css标题上下居中

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>CSS标题上下居中</title>
    <style>
        .container {
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh; /* 使容器高度占满整个视口 */
        }
    </style>
</head>
<body>
    <div class="container">
        <h1>居中的标题</h1>
    </div>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>CSS标题上下居中</title>
    <style>
        .container {
            display: grid;
            place-items: center;
            height: 100vh; /* 使容器高度占满整个视口 */
        }
    </style>
</head>
<body>
    <div class="container">
        <h1>居中的标题</h1>
    </div>
</body>
</html>