html - 使用 css 带阴影的三 Angular 形

Question

CSS

.caret-bottom
{
    display: inline-block;
    width: 0;
    height: 0;
    vertical-align:top;
    content: "";
    border-top: 9px solid #FFFFFF;
    border-right: 7px solid transparent;
    border-left: 7px solid transparent; 
    margin-top: 13px;
    margin-left: 4px;   
  }

HTML代码

<div class="caret-left"></div>

我需要像 3D 效果一样的三 Angular 形底部阴影。

Answer 1

.triangle {
  width: 100px;
  height: 100px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 16px 10px -17px rgba(0, 0, 0, 0.5);
}
.triangle:after {
  content: "";
  position: absolute;
  width: 50px;
  height: 50px;
  background: #999;
  -webkit-transform: rotate(45deg);
  top: 75px;
  left: 25px;
  box-shadow: -1px -1px 10px -2px rgba(0, 0, 0, 0.5);
}

<div class="triangle"></div>

演示

http://jsfiddle.net/w9Zgc/