小编les*_*shy的帖子

.title {
	width: 300px;
	height: 0px;
	border-bottom: 50px solid #f2f2f2;
	border-right: 50px solid transparent;
	opacity: .8;
	position: absolute;
	margin: 47px 0 0 62px;
}
#media {
	margin: 97px 0 0 62px;
	position: absolute;
	height: 100px;
	background-color: #f2f2f2;
	opacity: .8;
	width: 350px;
	z-index: 2;
	border-bottom: 6px double black;
	border-right: 6px double black;
}

<div id="media"></div>
<div class="title"></div>