html - 中底框-阴影

Question

我想创建一个底部边框下方有框显示的 H2

这是我的“基本”代码:

<div class="bloc-principal">
<h2 id="toto">My H2</h2>
</div>
<style type="text/css">
   #toto{
     box-shadow: 0 4px 2px -2px gray;
    }
</style>

但我想得到这个结果:http://www.hostingpics.net/viewer.php?id=275479boxshadow.png

另一边没有边框，只有底部中间的这个小阴影。

我试图找到教程，但我根本没有得到相同的结果....

Answer 1

我认为多色/渐变阴影超出了 box-shadow 属性的能力。我使用了具有该渐变的绝对定位元素并将其放置在文本顶部。

http://jsfiddle.net/efdJA/

#toto {
    position:relative;
    background-color:white;
    height:100px;
    border:1px solid red;
}

#toto:before {
background: rgb(255,255,255);
background: url(data:image/svg+xml;base64,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);
background: -moz-linear-gradient(left,  rgba(255,255,255,1) 0%, rgba(226,226,226,1) 50%, rgba(255,255,255,1) 100%);
background: -webkit-gradient(linear, left top, right top, color-stop(0%,rgba(255,255,255,1)), color-stop(50%,rgba(226,226,226,1)), color-stop(100%,rgba(255,255,255,1)));
background: -webkit-linear-gradient(left,  rgba(255,255,255,1) 0%,rgba(226,226,226,1) 50%,rgba(255,255,255,1) 100%);
background: -o-linear-gradient(left,  rgba(255,255,255,1) 0%,rgba(226,226,226,1) 50%,rgba(255,255,255,1) 100%);
background: -ms-linear-gradient(left,  rgba(255,255,255,1) 0%,rgba(226,226,226,1) 50%,rgba(255,255,255,1) 100%);
background: linear-gradient(to right,  rgba(255,255,255,1) 0%,rgba(226,226,226,1) 50%,rgba(255,255,255,1) 100%);
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ffffff', endColorstr='#ffffff',GradientType=1 );

    position:absolute;
    bottom:0;
    left:0;
    width:100%;
    height:10px;
    content:'';
}

对于可怕的背景乱码，我深表歉意，我使用了惊人的CSS Gradient Generator .