盒子
box-shadow用法总结
box-shadow:<length><length><length><length>|| <color>
CSS3盒阴影效果不仅支持盒外阴影,还支持内阴影,使用时增加一个inset属性即可。例如:box-shadow: inset 0 0 1px #fff;所表示的含义是没有偏移,1像素模糊的白色内阴影。

box- shadow还支持多阴影,例 如:box-shadow: inset 0 0 1px #fff, inset 4px 4px 20px rgba(255,255,255,0.33), inset -2px -2px 10px rgba(255,255,255,0.25);所表示的 含义是,无偏移1像素模糊白色阴影重叠于左上角4像素偏移20像素模糊透明度0.33的白色内阴影再重叠于右下角偏移2像素,模糊10像素,透明度 0.25的白色内阴影。


.drop-shadow.top {
box-shadow: 0 -4px 2px -2px rgba(0,0,0,0.4);
}
.drop-shadow.right {
box-shadow: 4px 0 2px -2px rgba(0,0,0,0.4);
}
.drop-shadow.bottom {
box-shadow: 0 4px 2px -2px rgba(0,0,0,0.4);
}
.drop-shadow.left {
box-shadow: -4px 0 2px -2px rgba(0,0,0,0.4);
}

.emphasize-dark {
box-shadow: 0 0 5px 2px rgba(0,0,0,.35);
}
.emphasize-light {
box-shadow: 0 0 0 10px rgba(255,255,255,.25);
}
.emphasize-inset {
box-shadow: inset 0 0 7px 4px rgba(255,255,255,.5);
}
.emphasize-border {
box-shadow: inset 0 0 0 7px rgba(255,255,255,.5);
}

.embossed-light {
border: 1px solid rgba(0,0,0,0.1);
box-shadow: inset 0 1px 0 rgba(255,255,255,0.7);
}
.embossed-heavy {
border: 1px solid rgba(0,0,0,0.1);
box-shadow:
inset 0 2px 3px rgba(255,255,255,0.3),
inset 0 -2px 3px rgba(0,0,0,0.3),
0 1px 1px rgba(255,255,255,0.9);
}

-webkit-border-radius: 40px;
-webkit-box-shadow: 0 0 1px #fff, 0 0 3px #000, 0 0 3px #000;
-moz-border-radius: 40px;
-moz-box-shadow: 0 0 1px #fff, 0 0 3px #000, 0 0 3px #000, inset 0 1px #fff, inset 0 12px rgba(255,255,255,0.15), inset 0 4px 10px #cef, inset 0 22px 5px #0773b4, inset 0 -5px 10px #0df;
height: 34px;
width: 80px;
border-radius: 40px;
background: #034a76;
box-shadow: 0 0 1px #fff, 0 0 3px #000, 0 0 3px #000, inset 0 1px #fff, inset 0 12px rgba(255,255,255,0.15), inset 0 4px 10px #cef, inset 0 22px 5px #0773b4, inset 0 -5px 10px #0df;
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