box-shadow: 5px 5px black
box-shadow: 5px 5px 5px black
box-shadow: 5px 10px 5px black
box-shadow: 5px 5px 5px 5px black
box-shadow: -5px -5px 5px black
box-shadow: inset 5px 5px black
box-shadow: inset 5px 5px 5px black
box-shadow: inset 5px 10px 5px black
box-shadow: inset 5px 5px 5px 5px black
box-shadow: inset -5px -5px 5px black
box-shadow: 0px 1px 3px rgba(0,0,0,0.4)
circle: box-shadow: 5px 5px black
circle: box-shadow: 5px 5px 5px black
circle: box-shadow: 5px 10px 5px black
circle: box-shadow: 5px 5px 5px 5px black
circle: box-shadow: -5px -5px 5px black
circle: box-shadow: 0px 1px 3px rgba(0,0,0,0.4)
点击动态切换 box-shadow: none
点击动态切换 box-shadow: 非法值