#principal h1 {
	width:770px;
	height:270px;
	background:url(../imgs/tit_desenha.jpg) center top no-repeat;
	text-indent:-9000px;
	
	margin:0 auto;
}

.lista_tb_design {
	list-style:none;
}

.lista_tb_design li {
	list-style:none;
	padding:5px 0;
}
.lista_tb_design li a:hover {
	opacity:0.80;
	filter: alpha(opacity=80);
	-moz-opacity:0.8;
}
.lista_tb_design li a:active {
	opacity:0.90;
	filter: alpha(opacity=90);
	-moz-opacity:0.9;
}
.lista_tb_design img {
	border:0;
}