使用带凹槽值的border-style属性设置刻在页面上的边框。您可以尝试运行以下代码以实现 border-style属性：
<html> <head> </head> <body> <p style = "border-width:4px; border-style:none;"> This is a border with none width. </p> <p style = "border-width:4px; border-style:groove;"> This is a border carved into the page. </p> </body> </html>