老师，这样写为什么不生效呢

来源：2-16 编程练习

一心励志当码农

2021-04-24 14:53:59

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        #para1 {
           font:italic bold;
           color: red;
        }

        #para2 {
            color: blue;
            font-weight: bold;
        }
    </style>

</head>
<body>
    <p id="para1">
        Web前端攻城狮(Web front siege lion)
    </p>

    <p id="para2">
        CSS层叠样式表(Cascading Style Sheets)
    </p>
</body>
</html>