CSS3 box-shadow:

浏览器参照基准:Firefox4 and Later, Chrome5 and Later, Safari5 and Later, Opera10.53 and Later, IE9.0 and Later

圆角+阴影效果:

#box-shadow{
	box-shadow:5px 5px 5px #444;
}

圆角+半透明+阴影效果:

#box-shadow2{
	box-shadow:5px 5px 5px rgba(0,0,0,.4);
}
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