弯曲的阴影消失与背景颜色 [英] curved shadow disappears with background-color

问题描述

我想要一个曲线水平阴影，它的工作原理，但背景颜色影响阴影

I want a curve horizontal shadow, it works, but the background-color affects to shadow

我有这个html：

<div class="dcontainer">
  <div class="dshadow curva curva-h">
    myshadow
  </div>
</div>

和此css：

.dcontainer {
    /*background-color: #f6f6f6;*/
    height: 140px;
}
.dshadow {
position:relative;
float:left;
width:40%;
padding:1em;
margin:2em 10px 4em;
background:#fff;
box-shadow:0 1px 4px rgba(0, 0, 0, 0.3), 0 0 40px rgba(0, 0, 0, 0.1) inset;
}

.dshadow:before,
.dshadow:after {
content:"";
position:absolute;
z-index:-2;
}

.curva:before {
top:21px;
bottom:10px;
left:0;
right:50%;
box-shadow:0 0 15px rgba(0,0,0,0.6);
border-radius:10px / 100px;
}

.curva-h:before {
top:50%;
bottom:0;
left:10px;
right:10px;
border-radius:100px / 10px;
}

如果我取消注释背景颜色阴影curva消失，会发生什么？ ??
我不明白...

if I uncomment background-color the shadow "curva" disappears, what happen??? I don't understand...

推荐答案

您必须调整 index ，使其低于阴影 - DEMO

You have to adjust the z-index of your container to make it lower than the shadow - DEMO

.dcontainer {
    background-color: #f6f6f6;
    height: 140px;
    position: relative;
    z-index: -5;
}

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