Bootstrap中的panel-info类是上下文状态类，用于形成对特定上下文更有意义的面板。这会将信息添加到面板，并且为蓝色。
您可以尝试运行以下代码以实现panel-info类-
<!DOCTYPE html> <html> <head> <title>Bootstrap Example</title> <link href = "/bootstrap/css/bootstrap.min.css" rel = "stylesheet"> <script src = "/scripts/jquery.min.js"></script> <script src = "/bootstrap/js/bootstrap.min.js"></script> </head> <body style = "background: orange;"> <div class = "panel panel-info"> <div class = "panel-heading"> <h3 class = "panel-title">Panel Title</h3> </div> <div class = "panel-body"> This is a demo panel. </div> </div> </body> </html>