.conteudo-width {width: 1170px; margin: 0 auto;}
.trapezio {position: absolute; z-index: 100; max-width: 100%;}
.trapezio.top{border-top: var(--heigth) solid  #ffffff; border-left: 25px solid transparent;border-right: 25px solid  transparent; height: 0; top: 100%;}
.trapezio.bot{border-bottom: var(--heigth) solid  #ffffff; border-left: 25px solid transparent;border-right: 25px solid  transparent; height: 0; bottom: 100%;}