.contenedor_pestanas{margin-bottom: 40px;}
.contenedor_pestanas .pestanas{padding: 1.5em 0 .5em; overflow: hidden; margin-bottom: .5em;}
.contenedor_pestanas .pestanas li{width: 24.5%; margin-left: .65%; float: left; height: 4.3em; background: #C1CFD9; color: #fff; font-size: .88em; font-weight: 500; text-transform: uppercase; text-align: center; vertical-align: middle; line-height: 1.2em; padding: .9em .2em 0;}
.contenedor_pestanas .pestanas li:nth-child(1), .contenedor_pestanas .pestanas li:nth-child(3){padding-top: 1.4em}
.contenedor_pestanas .pestanas li:first-child{margin-left: 0; }
.contenedor_pestanas .pestanas li.activa{background: #2E3641; position: relative;}
.contenedor_pestanas .pestanas li.activa:after{content:""; width: 0; height: 0; border-left: 7px solid transparent; border-right: 7px solid transparent; border-top: 10px solid #2E3641; display: block; position: absolute; bottom: -10px; right: 49%;}

@media(max-width: 999px){
	.contenedor_pestanas .pestanas li {font-size: 0.77em;}
}

@media(max-width: 767px){
	.contenedor_pestanas .pestanas li {font-size: 0.61em;}
}

@media(max-width: 599px){
	.contenedor_pestanas .pestanas li{width: 49.75%; margin-left: .5%; margin-bottom: .2em; font-size: 0.7em; }
	.contenedor_pestanas .pestanas li:nth-child(2n+1){margin-left: 0; }
	.contenedor_pestanas .pestanas li.activa:after{display: none}
}