.grid_container {width:1000px;margin:0 auto;}
.grid_container:after {display:block;clear:both;content:'';}
.grid_container_left {width:660px;float:left;}
.grid_container_right {width:310px;float:right;}
.grid_container_right_content {width:660px;float:right;}
.grid_container_left_sidebar {width:310px;float:left;}

.grid_container .pt_40 {padding-top:40px;} /* pt -> padding top */
.grid_container .pt_100 {padding-top:100px;} /* pt -> padding top */
.grid_container .pt_120 {padding-top:120px;} /* pt -> padding top */

.grid_container .bloco_de_conteudo_sb,
.grid_container .bloco_de_conteudo {
	margin: 0 0 25px 0;
}

.grid_container .bloco_de_conteudo {
	border: 1px solid #e9e9e9;
	background: #fff;
	padding: 25px;
}

.grid_container .bloco_de_conteudo_sb { /* sb -> sem borda */

}