outline:#00ff00 solid thick; 边框参数: 样式: none:默认,无轮廓 dotted:点状轮廓 dashed:虚线轮廓 solid:实现轮廓 double:双线轮廓,宽度等于outline-width的值 groove:3D凹槽轮廓,效果取决于outline-color的值 ridge:3D凸槽轮廓,效果取决于outline-color的值 inset:3D凹边轮廓,效果取决于outline-color的值 outset:3D凸边轮廓,效果取决于outline-co…