Create Pure CSS 3D Ribbon

Since I always insists using CSS3 instead of images, here is a good example of CSS usage to create a 3D ribbon.
James has used a single level element containing a child element with the class.

<p class="ribbon">
    <strong class="ribbon-content">Sangtao24.com ribbons</strong>
</p>

Code (markup):

In order to achieve it using CSS, he has used before and after pseudo codes and good use of border properties

.ribbon {
  font-size: 16px !important;

  position: relative;
  background: #ba89b6;
  color: #fff;
  text-align: center;
  padding: 1em 2em; /* Adjust to suit */
   margin: 0 0 3em; /* Based on 24px vertical rhythm. 48px bottom margin -  normally 24 but the ribbon 'graphics' take up 24px themselves so we  double it. */
}
.ribbon:before, .ribbon:after {
  content: "";
  position: absolute;
  display: block;
  bottom: -1em;
  border: 1.5em solid #986794;
  z-index: -1;
}
.ribbon:before {
  left: -2em;
  border-right-width: 1.5em;
  border-left-color: transparent;
}
.ribbon:after {
  right: -2em;
  border-left-width: 1.5em;
  border-right-color: transparent;
}
.ribbon .ribbon-content:before, .ribbon .ribbon-content:after {
  content: "";
  position: absolute;
  display: block;
  border-style: solid;
  border-color: #804f7c transparent transparent transparent;
  bottom: -1em;
}
.ribbon .ribbon-content:before {
  left: 0;
  border-width: 1em 0 0 1em;
}
.ribbon .ribbon-content:after {
  right: 0;
  border-width: 1em 1em 0 0;
}

Code (markup):

If your using the ribbon inside another element, add this CSS.

position: relative;
z-index: 1;

Code (markup):

Source: http://forum.sangtao24.com/programming-coding/create-pure-css-ribbon-t247.html