语法
box-shadow: X轴偏移量 Y轴偏移量 模糊半径 扩散半径 颜色
示例：
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> </head> <style> .shadow div{ float:left; margin:50px 120px; width:100px; height:100px; border:2px solid orange; text-align:center; line-height:100px; } .left{ box-shadow:-5px 0 10px -5px #00ff00; } .bottom{ box-shadow:0 5px 10px -5px #00ff00; } .right{ box-shadow:5px 0 10px -5px #00ff00; } .top{ box-shadow:0px -5px 10px -5px #00ff00; } .left-top{ box-shadow:-5px -5px 10px -4px #00ff00; } .right-top{ box-shadow:5px -5px 10px -4px #00ff00; } .left-bottom{ box-shadow:-5px 5px 10px -4px #00ff00; } .right-bottom{ box-shadow:5px 5px 10px -4px #00ff00; } .no-left{ /* .right-bottom,.right-top组合 */ box-shadow:5px 5px 10px -4px #00ff00,5px -5px 10px -4px #00ff00; } .no-bottom{ /* .left-top,.right-top组合 */ box-shadow:-5px -5px 10px -4px #00ff00,5px -5px 10px -4px #00ff00; } .no-right{ /* .left-top，.left-bottom组合 */ box-shadow:-5px -5px 10px -4px #00ff00,-5px 5px 10px -4px #00ff00; } .no-top{ /* .left-bottom,,right-bottom组合 */ box-shadow:-5px 5px 10px -4px #00ff00,5px 5px 10px -4px #00ff00; } </style> <body> <div class="shadow"> <div class="left">左边阴影</div> <div class="bottom">底部阴影</div> <div class="right">右部阴影</div> <div class="top">顶部部阴影</div> <div class="left-top">左上阴影</div> <div class="right-top">右上阴影</div> <div class="left-bottom">左下阴影</div> <div class="right-bottom">右下阴影</div> <div class="no-left">无左阴影</div> <div class="no-bottom">无下阴影</div> <div class="no-right">无右阴影</div> <div class="no-top">无上阴影</div> </div> </body> </html>
