Use a negative value for the fourth length which defines the spread distance. This is often overlooked, but supported by all major browsers. ... <看更多>

CSS3 Box Shadow, only top/right/bottom/left and all - box-shadow.html. ... .shadow-inset { box-shadow: inset 0 0 20px rgba(115,115,115,0.75); } ... ... <看更多>

box -shadow's unnoticed spread · Read me! · Constant box-shadow · box-shadow only at the bottom · inset box-shadow and multiple shadows · box-shadow gone wild. ... <看更多>

CSS Shadows: Inset Curved Shadow (Top & Bottom). 3,647 views3.6K views. Mar 15, 2014 ... CSS Box ... ... <看更多>