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(max-width:980px){.prosu-sub-hero-inner,.prosu-sub-split,.prosu-sub-split-reverse{grid-template-columns:1fr}.prosu-sub-grid-3,.prosu-sub-service-grid,.prosu-sub-component-grid{grid-template-columns:repeat(2,1fr)}.prosu-sub-process-grid{grid-template-columns:repeat(3,1fr)}.prosu-sub-gallery{grid-template-columns:1fr 1fr}.prosu-sub-gallery .prosu-sub-image-card:first-child{grid-column:1 / -1;grid-row:auto}.prosu-sub-contact-grid{grid-template-columns:1fr 1fr}}@media (max-width:640px){.prosu-sub-container{width:min(100% - 28px, 1120px)}.prosu-sub-section{padding:62px 0}.prosu-sub-hero{padding:72px 0 62px}.prosu-sub-hero-ctas,.prosu-sub-cta-btns{flex-direction:column}.prosu-sub-btn{width:100%}.prosu-sub-grid-3,.prosu-sub-service-grid,.prosu-sub-component-grid,.prosu-sub-process-grid,.prosu-sub-gallery,.prosu-sub-contact-grid{grid-template-columns:1fr}.prosu-sub-image-caption{position:static;border-radius:0}}</style><!-- BLOQUE:Hero / banner principal Instrucción:pega este archivo en un widget HTML de Elementor. Requiere que el archivo 00-estilos-globales.html esté pegado una sola vez en la página. --><div class="prosu-sub-wrapper"><!-- HERO --><section class="prosu-sub-hero" aria-label="Mantenimiento de subestaciones eléctricas en El Salvador"><div class="prosu-sub-container"><div class="prosu-sub-hero-inner"><div><div class="prosu-sub-badge">Ingeniería eléctrica industrial en El Salvador</div><h1 class="prosu-sub-h1">Mantenimiento de Subestaciones Eléctricas en El Salvador </h1><p class="prosu-sub-hero-sub">Servicio especializado de mantenimiento preventivo y correctivo para subestaciones eléctricas en empresas,industrias,comercios e infraestructura crítica. Realizamos evaluación técnica en sitio,diagnóstico de condiciones,ejecución del mantenimiento e informe técnico con observaciones y recomendaciones. </p><div class="prosu-sub-hero-ctas"><a href="#contacto" class="prosu-sub-btn prosu-sub-btn--primary">Solicitar visita técnica</a><a href="https://wa.me/50375440987?text=Hola%2C%20necesito%20informaci%C3%B3n%20sobre%20mantenimiento%20de%20subestaciones%20el%C3%A9ctricas." target="_blank" rel="noopener" class="prosu-sub-btn prosu-sub-btn--wa">Contactar por WhatsApp</a></div><p class="prosu-sub-hero-note">Servicio sujeto a inspección y evaluación técnica previa. La propuesta se elabora según las condiciones reales de la instalación. </p></div><!-- IMAGEN PRINCIPAL --><div class="prosu-sub-image-card"><img src="REEMPLAZAR-URL-IMAGEN-HERO.webp" alt="Mantenimiento de subestación eléctrica industrial en El Salvador realizado por PROSUMILEC" loading="eager"><div class="prosu-sub-image-caption"><strong>Evaluación técnica en sitio</strong><span>Mantenimiento de subestaciones eléctricas para empresas e industrias.</span></div></div></div></div></section></div>