CSS Styling Help for a Triangle Navigation Code

Hi,

It’s a wonderful plugin, but I am absolutely lost to enhance the CSS styling for it. I found in the internet a page, and I would like now implement this css style. But it’s not working. Maybe you or soemeone other can help? Thank you very much in advance.

Regards, Luigi

The author of this code is Chris Coyier

Link:css-tricks.com/triangle-breadcrumbs

HTML
<ul class="breadcrumb">
<li><a href="#">Home</a></li>
<li><a href="#">Vehicles</a></li>
<li><a href="#">Vans</a></li>
<li><a href="#">Camper Vans</a></li>
<li><a href="#">1989 VW Westfalia Vanagon</a></li>

CSS
.breadcrumb {
	list-style: none;
	overflow: hidden;
	font: 18px Helvetica, Arial, Sans-Serif;
}
.breadcrumb li {
	float: left;
}
.breadcrumb li a {
	color: white;
	text-decoration: none;
	padding: 10px 0 10px 65px;
	background: brown;                   /* fallback color */
	background: hsla(34,85%,35%,1);
	position: relative;
	display: block;
	float: left;
}
.breadcrumb li a:after {
	content: " ";
	display: block;
	width: 0;
	height: 0;
	border-top: 50px solid transparent;           /* Go big on the size, and let overflow hide */
	border-bottom: 50px solid transparent;
	border-left: 30px solid hsla(34,85%,35%,1);
	position: absolute;
	top: 50%;
	margin-top: -50px;
	left: 100%;
	z-index: 2;
}
.breadcrumb li a:before {
	content: " ";
	display: block;
	width: 0;
	height: 0;
	border-top: 50px solid transparent;
	border-bottom: 50px solid transparent;
	border-left: 30px solid white;
	position: absolute;
	top: 50%;
	margin-top: -50px;
	margin-left: 1px;
	left: 100%;
	z-index: 1;
}
.breadcrumb li:first-child a {
	padding-left: 10px;
}
.breadcrumb li:nth-child(2) a       { background:        hsla(34,85%,45%,1); }
.breadcrumb li:nth-child(2) a:after { border-left-color: hsla(34,85%,45%,1); }
.breadcrumb li:nth-child(3) a       { background:        hsla(34,85%,55%,1); }
.breadcrumb li:nth-child(3) a:after { border-left-color: hsla(34,85%,55%,1); }
.breadcrumb li:nth-child(4) a       { background:        hsla(34,85%,65%,1); }
.breadcrumb li:nth-child(4) a:after { border-left-color: hsla(34,85%,65%,1); }
.breadcrumb li:nth-child(5) a       { background:        hsla(34,85%,75%,1); }
.breadcrumb li:nth-child(5) a:after { border-left-color: hsla(34,85%,75%,1); }
.breadcrumb li:last-child a {
	background: transparent !important;
	color: black;
	pointer-events: none;
	cursor: default;
}
.breadcrumb li a:hover { background: hsla(34,85%,25%,1); }
.breadcrumb li a:hover:after { border-left-color: hsla(34,85%,25%,1) !important

http://ww.wp.xz.cn/extend/plugins/breadcrumb-navxt/