用于重叠式div的CSS3box-shadow-CSS3box-shadowforoverlapping-likedivs

15  

This jsfiddle does what you want.

这个jsfiddle做你想要的。

The way it works is with a main #wrap element that centres the content and creates a coordinate map for the absolutely positioned #main element. It does this because of its position: relative CSS rule. You end up with the following markup:

它的工作方式是使用一个主要的#wrap元素使内容居中，并为绝对定位的#main元素创建一个坐标图。这是因为它的位置：相对CSS规则。您最终得到以下标记：

The header is then placed inside of this and given position: relative and a z-index to set it stacking above the #main container.

然后将标题放在此位置和给定位置：relative和z-index以将其设置在#main容器上方。

Finally #main is absolutely positioned below the header. The CSS looks like so:

最后#main绝对位于标题下方。 CSS看起来像这样：

/* centre content and create coordinate map for absolutely positioned #main */
#wrap {
    width: 300px;
    margin: 20px auto;
    position: relative;
}

header, #main {
    background: #fff;

    /* rounded corners */
    border: 1px solid #211C18;
    border-radius: 5px;
    -moz-border-radius: 5px;
    -webkit-border-radius: 5px;    

    /* dropshadows */
    box-shadow: 2px 4px 20px #005377;
    -moz-box-shadow: 2px 4px 20px #005377;
    -webkit-box-shadow: 2px 4px 20px #005377;
}

header {
    display: block;
    width: 300px;
    height: 50px;

    /* stack above the #main container */
    position: relative;
    z-index: 2;
}

#main {
    width: 200px;
    height: 70px;

    /* stack below the header and underlap it...if that's even a word */
    position: absolute;
    z-index: 1;
    top: 40px;
    left: 50px;
}

3  

I just had some luck using relative positioning.

我只是运气相对定位。

For example.

例如。

1st div has a box-shadow, and a bottom margin. 2nd div slides up under the shadow.

第一个div有一个盒子阴影和一个底部边距。第二个div在阴影下滑动。

#firstdiv {width: 960px; box-shadow: 5px 5px 5px #ccc; margin-bottom: 10px;}
#seconddiv {width: 960px; position: relative; top: -10px;}

It's not the best solution but it works for me.

这不是最好的解决方案，但它对我有用。

2  

setting position to "relative" will already solve the problem!

将位置设置为“相对”已经解决了问题！