css字体在div中居中

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>水平居中示例</title>
    <style>
        .container {
            text-align: center;
        }
    </style>
</head>
<body>
    <div class="container">
        <p>这段文本在水平方向上居中</p>
    </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>垂直居中示例</title>
    <style>
        .container {
            display: flex;
            align-items: center;
            height: 200px;
        }
    </style>
</head>
<body>
    <div class="container">
        <p>这段文本在垂直方向上居中</p>
    </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>水平和垂直居中示例</title>
    <style>
        .container {
            display: flex;
            justify-content: center;
            align-items: center;
            height: 200px;
        }
    </style>
</head>
<body>
    <div class="container">
        <p>这段文本在水平和垂直方向上都居中</p>
    </div>
</body>
</html>