.top_us { background-image: url('../img/banner_nosotros_1748550631.jpg'); }
.top_serv { background-image: url('../img/banner_servicios_1748530157.webp'); }
.top_portfolio { background-image: url('../img/banner_portafolio_1748908727.jpg'); }
.top_contact { background-image: url('../img/banner_contacto_1748543080.jpg'); }
.top_prov { background-image: url('../img/banner_proveedores_1748530264.webp'); }
.top_avpriv { background-image: url('../img/banner_aviso_1748530289.jpg'); }