要设置Bootstrap卡的容器，您需要使用card-body类。它允许您添加内容
以下是卡体类-
<div class="card-body"> Body of the card </div>
并在卡类中设置以上内容，如以下代码片段所示：
<div class="card"> <div class="card-body">Body of the card.</div> </div>
您可以尝试运行以下代码来实现card-body类-
<!DOCTYPE html> <html lang="en"> <head> <title>Bootstrap Example</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css"> <script src="https://cdn.staticfile.org/jquery/3.3.1/jquery.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script> </head> <body> <div class="container"> <h3>Heading Three</h3> <div class="card"> <div class="card-body">Body of the card.</div> </div> </div> </body> </html>