1。边框 转自https://www.runoob.com/css3/css3-borders.html
border-radius 圆角，例子 border-radius:25px
border-shadow 盒阴影 ，例子 border-shadow:10px 10px 5px #888888;
border-image 边界图片，例：border-image:url(border.png) 30 30 round;
2.背景 转自 https://www.runoob.com/css3/css3-backgrounds.html
background-image 背景图片，例
{background-image:url(img_flwr.gif),url(paper.gif);
background-position:right botton,left top;
background-repeat:no-repeat,repeat;
}
另可
{ background: url(img_flwr.gif) right bottom no-repeat, url(paper.gif) left top repeat; }
background-size 背景图片大小。例 background-size:80px 60px;配合backgroud-repeat:repeat no-repeat
完全填充
{ background:url(img_flwr.gif); background-size:100% 100%; background-repeat:no-repeat; }
background-Origin 属性，指定背景适用的位置，可选 border-box,padding-box,content-box
多个背景图片 background-image:url(img_flwr.gif),url(img_tree.gif)
background-clip 背景剪裁，例 background-clip:content-box;