Tab content (individual css) background color not working..

The following code (according to your homepage) is suppose to change the color of the second tabs content, but it doesn’t.

/* Second tab content */
.su-tabs > .su-tabs-content > div:nth-child(2) {background-color:#3c0000;}

The “all” code does work:

.su-tabs > .su-tabs-panes > div {

  /* Background color */
  background-color: #ffcc00;
}

.. Or is it me that’s messing it up?