:root{
  --amarillo:#FFC03D;
  --amarillo-2:#FFD77A;
  --marino:#212D45;
  --marino-2:#2B3A58;
  --marino-3:#18213A;
  --texto:#4B4F58;
  --claro:#F5F5F5;
  --blanco:#FFFFFF;
  --wa:#1B7D47;
  --max:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Open Sans",system-ui,sans-serif;color:var(--texto);background:var(--blanco);font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{font-family:"Montserrat",sans-serif;color:var(--marino);line-height:1.12;font-weight:700}
a{color:inherit}
svg{display:block;max-width:100%}
:focus-visible{outline:3px solid var(--amarillo);outline-offset:3px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-999px;top:8px;background:var(--amarillo);color:var(--marino);padding:8px 14px;z-index:99;font-weight:600}
.skip:focus{left:8px}
.oscuro{background:var(--marino);color:#C9D2E3}
.oscuro h1,.oscuro h2,.oscuro h3{color:#fff}

/* Botones */
.btn{display:inline-flex;align-items:center;gap:10px;font-family:"Montserrat",sans-serif;font-weight:700;font-size:15px;text-decoration:none;padding:14px 24px;border:2px solid currentColor;background:transparent;cursor:pointer;border-radius:4px;transition:background .15s,color .15s,border-color .15s}
.btn-am{background:var(--amarillo);border-color:var(--amarillo);color:var(--marino)}
.btn-am:hover{background:var(--amarillo-2);border-color:var(--amarillo-2)}
.btn-wa{background:var(--wa);border-color:var(--wa);color:#fff}
.btn-wa:hover{background:#1E8A4F;border-color:#1E8A4F}
.btn-lin{color:#fff;border-color:rgba(255,255,255,.5)}
.btn-lin:hover{border-color:var(--amarillo);color:var(--amarillo)}
.btn-mar{color:var(--marino);border-color:var(--marino)}
.btn-mar:hover{background:var(--marino);color:#fff}
.btn svg{width:20px;height:20px;flex:none}

/* Cabecera */
header{position:fixed;top:0;left:0;right:0;z-index:40;transition:background .25s,box-shadow .25s}
header.solido{background:rgba(33,45,69,.97);box-shadow:0 2px 20px rgba(0,0,0,.25)}
.nav{display:flex;align-items:center;justify-content:space-between;height:78px}
.logo{display:flex;align-items:center;gap:12px;text-decoration:none}
.logo svg{width:52px;height:52px;border-radius:6px}
.logo b{font-family:"Montserrat",sans-serif;font-weight:800;font-size:20px;color:#fff;letter-spacing:.01em}
.nav ul{display:flex;gap:28px;list-style:none;align-items:center}
.nav ul a{text-decoration:none;color:#fff;font-weight:500;font-size:15px}
.nav ul a:hover{color:var(--amarillo)}
.nav ul .btn{padding:10px 18px;font-size:14px;color:var(--marino)}
.menu-btn{display:none;background:none;border:0;cursor:pointer;padding:8px}
.menu-btn span{display:block;width:26px;height:2px;background:#fff;margin:6px 0}

/* HERO inmersivo */
.hero{min-height:100vh;min-height:100svh;position:relative;overflow:hidden;display:flex;align-items:center;padding:110px 0 60px;
  background:radial-gradient(1200px 600px at 75% 30%,#2E3F63 0%,var(--marino) 55%,var(--marino-3) 100%)}
.hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:40px 40px;pointer-events:none}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:.9fr 1.1fr;gap:40px;align-items:center}
.hola{font-family:"Montserrat",sans-serif;font-weight:700;color:var(--amarillo);font-size:18px;margin-bottom:14px}
.hero h1{color:#fff;font-size:clamp(40px,5.4vw,70px);font-weight:800;letter-spacing:-.01em}
.hero .lead{font-size:19px;margin:22px 0 30px;max-width:32em;color:#C9D2E3}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap}
.pista{margin-top:30px;font-size:14px;color:#AEB9CE;display:flex;align-items:center;gap:10px}
.pista i{display:inline-block;width:10px;height:10px;border-radius:50%;background:var(--amarillo);box-shadow:0 0 0 0 rgba(255,192,61,.6);animation:pulso 2s infinite}
@keyframes pulso{70%{box-shadow:0 0 0 10px rgba(255,192,61,0)}100%{box-shadow:0 0 0 0 rgba(255,192,61,0)}}

.escena{position:relative}
.escena svg{width:100%;height:auto;overflow:visible}
.flujo{stroke-dasharray:6 10;animation:corre 1.2s linear infinite}
@keyframes corre{to{stroke-dashoffset:-32}}
.sol-rayos{transform-origin:110px 80px;animation:gira 30s linear infinite}
@keyframes gira{to{transform:rotate(360deg)}}
.husillo{transform-origin:530px 330px;animation:gira .6s linear infinite}
.boquilla{animation:imprime 3s ease-in-out infinite alternate}
@keyframes imprime{from{transform:translateX(0)}to{transform:translateX(34px)}}
.capa{animation:crece 6s steps(6) infinite;transform-origin:bottom;transform-box:fill-box}
@keyframes crece{from{transform:scaleY(.15)}to{transform:scaleY(1)}}
.hotspot{cursor:pointer}
.hotspot circle.anillo{fill:none;stroke:var(--amarillo);stroke-width:2;transform-box:fill-box;transform-origin:center;animation:onda 2.2s ease-out infinite}
@keyframes onda{from{transform:scale(.6);opacity:1}to{transform:scale(2);opacity:0}}
.hotspot:hover circle.punto,.hotspot:focus circle.punto{fill:#fff}
.hotspot text{font-family:"Montserrat",sans-serif;font-weight:700;font-size:13px;fill:#fff}
.tooltip{position:absolute;background:#fff;color:var(--marino);padding:10px 14px;border-radius:6px;font-size:14px;max-width:230px;box-shadow:0 8px 24px rgba(0,0,0,.3);pointer-events:none;opacity:0;transform:translateY(6px);transition:opacity .15s,transform .15s}
.tooltip.ver{opacity:1;transform:none}
.tooltip b{font-family:"Montserrat",sans-serif;display:block;margin-bottom:2px}

/* Barra de líneas */
.lineas-barra{background:var(--amarillo)}
.lineas-barra .wrap{display:grid;grid-template-columns:repeat(4,1fr)}
.lineas-barra a{display:flex;gap:14px;align-items:center;padding:22px 18px;text-decoration:none;color:var(--marino);border-right:1px solid rgba(33,45,69,.18);transition:background .15s}
.lineas-barra a:first-child{border-left:1px solid rgba(33,45,69,.18)}
.lineas-barra a:hover{background:var(--amarillo-2)}
.lineas-barra svg{width:38px;height:38px;flex:none}
.lineas-barra b{font-family:"Montserrat",sans-serif;font-size:16px;display:block;line-height:1.2}
.lineas-barra small{font-size:13px}

/* Secciones */
section{padding:110px 0}
.cab{max-width:760px;margin-bottom:56px}
.cab .eti{font-family:"Montserrat",sans-serif;font-weight:700;color:#8A6200;font-size:15px;margin-bottom:10px;display:block}
.oscuro .cab .eti{color:var(--amarillo)}
.cab h2{font-size:clamp(32px,4vw,50px);font-weight:800}
.cab p{font-size:18px;margin-top:16px}
.revela{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.revela.ver{opacity:1;transform:none}

/* Solar: scrollytelling */
.solar-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;align-items:start}
.pasos-solar{display:flex;flex-direction:column;gap:22vh;padding:6vh 0 18vh}
.paso{border-left:4px solid #DDE2EA;padding:6px 0 6px 24px;transition:border-color .3s,opacity .3s;opacity:.45}
.paso.activo{border-color:var(--amarillo);opacity:1}
.paso .num{font-family:"Montserrat",sans-serif;font-weight:800;color:var(--amarillo);font-size:15px}
.paso h3{font-size:28px;margin:4px 0 10px}
.paso p{font-size:17px}
.sticky{position:sticky;top:100px}
.diagrama{background:var(--marino);border-radius:12px;padding:26px;color:#C9D2E3}
.diagrama svg text{font-family:"Montserrat",sans-serif}
.comp{transition:opacity .35s}
.diagrama[data-paso] .comp{opacity:.35}
.diagrama[data-paso="0"] .c-sol,.diagrama[data-paso="1"] .c-panel,.diagrama[data-paso="2"] .c-inv,.diagrama[data-paso="3"] .c-bat,.diagrama[data-paso="4"] .c-casa,.diagrama[data-paso="4"] .c-red,.diagrama[data-paso="5"] .comp{opacity:1}
.hora{margin-top:18px;display:flex;align-items:center;gap:14px}
.hora label{font-family:"Montserrat",sans-serif;font-weight:700;color:#fff;font-size:14px;white-space:nowrap}
.hora input{flex:1;accent-color:var(--amarillo)}
.hora output{font-family:"Montserrat",sans-serif;font-weight:800;color:var(--amarillo);font-size:22px;min-width:64px;text-align:right}
.lectura{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px}
.lectura div{background:var(--marino-2);border-radius:8px;padding:10px 12px}
.lectura small{display:block;font-size:12px;color:#AEB9CE}
.lectura b{font-family:"Montserrat",sans-serif;font-size:20px;color:#fff}
.explica{font-size:14px;margin-top:12px;color:#AEB9CE;min-height:44px}

/* Simulador */
.sim{background:var(--claro)}
.sim-box{display:grid;grid-template-columns:1fr 1fr;background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 20px 50px rgba(33,45,69,.12)}
.sim-in{padding:40px}
.sim-out{padding:40px;background:var(--marino);color:#C9D2E3}
label.l{display:block;font-family:"Montserrat",sans-serif;font-weight:700;color:var(--marino);font-size:15px;margin-bottom:8px}
.campo{margin-bottom:26px}
.ayuda{font-size:14px;margin-top:6px;color:#5C616B}
.rango{display:flex;gap:16px;align-items:center}
input[type=range]{flex:1;accent-color:#E0A11E;height:28px}
.rango output{font-family:"Montserrat",sans-serif;font-size:26px;font-weight:800;color:var(--marino);min-width:120px;text-align:right}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips input{position:absolute;opacity:0;pointer-events:none}
.chips label{padding:9px 16px;border:2px solid #D6DBE4;border-radius:40px;cursor:pointer;font-weight:600;font-size:14px;color:var(--marino);transition:all .15s}
.chips input:checked+label{background:var(--marino);border-color:var(--marino);color:#fff}
.chips input:focus-visible+label{outline:3px solid var(--amarillo);outline-offset:2px}
.oscuro .chips label{border-color:#45567A;color:#fff}
.oscuro .chips input:checked+label{background:var(--amarillo);border-color:var(--amarillo);color:var(--marino)}
.res-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:22px}
.res{background:var(--marino-2);border-radius:8px;padding:16px 18px}
.res small{display:block;font-size:13px;color:#AEB9CE}
.res strong{font-family:"Montserrat",sans-serif;font-size:34px;font-weight:800;color:#fff;line-height:1.2}
.res strong em{font-style:normal;font-size:16px;color:var(--amarillo);margin-left:4px}
.techo{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:18px;min-height:30px}
.techo span{width:22px;height:34px;background:linear-gradient(160deg,#4C6BA8,#2A4275);border:1px solid #6F8BC4;border-radius:2px;animation:aparece .3s ease-out both}
@keyframes aparece{from{opacity:0;transform:translateY(-6px)}}
.nota{font-size:13px;color:#AEB9CE;margin-bottom:20px}

/* EV */
.ev-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:start}
.ev-panel{background:var(--marino-2);border-radius:12px;padding:32px}
.ev-panel .campo{margin-bottom:22px}
.ev-panel label.l{color:#fff}
.bateria{position:relative;height:74px;border:3px solid #fff;border-radius:10px;margin:28px 14px 14px 0;overflow:hidden}
.bateria::after{content:"";position:absolute;right:-14px;top:22px;width:10px;height:24px;background:#fff;border-radius:0 4px 4px 0}
.bateria .carga{position:absolute;left:0;top:0;bottom:0;width:20%;background:linear-gradient(90deg,var(--amarillo),#FFE29A);transition:width 1.6s ease}
.bateria .pct{position:absolute;inset:0;display:grid;place-items:center;font-family:"Montserrat",sans-serif;font-weight:800;font-size:24px;color:#fff;text-shadow:0 1px 3px rgba(0,0,0,.6)}
.ev-res{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:20px}
.ev-res div{background:var(--marino);border-radius:8px;padding:12px 14px}
.ev-res small{display:block;font-size:12px;color:#AEB9CE}
.ev-res b{font-family:"Montserrat",sans-serif;font-size:24px;color:#fff}
.check{list-style:none;display:grid;gap:14px}
.check li{display:grid;grid-template-columns:34px 1fr;gap:14px;align-items:start}
.check li svg{width:34px;height:34px}
.check b{font-family:"Montserrat",sans-serif;color:#fff;display:block;font-size:17px}
.check span{font-size:15px}

/* ===== Mecanizado ===== */
.mec-intro{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:end;margin-bottom:56px}
.mec-intro .cab{margin-bottom:0}
.datos-rapidos{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.datos-rapidos div{border-left:4px solid var(--amarillo);background:var(--claro);padding:14px 16px;border-radius:0 8px 8px 0}
.datos-rapidos b{font-family:"Montserrat",sans-serif;color:var(--marino);font-size:17px;display:block}
.datos-rapidos span{font-size:14px}

/* Torno guiado por scroll */
.torno-scroll{height:420vh;position:relative}
.torno-sticky{position:sticky;top:78px;height:calc(100vh - 78px);display:flex;align-items:center}
.torno-panel{background:var(--marino);border-radius:16px;padding:28px 32px;width:100%;display:grid;grid-template-columns:1.5fr 1fr;gap:32px;align-items:center;color:#C9D2E3}
.torno-panel svg{width:100%;height:auto}
.torno-panel svg text{font-family:"Montserrat",sans-serif}
.etapas{list-style:none;display:grid;gap:6px;margin-bottom:22px}
.etapas li{display:grid;grid-template-columns:28px 1fr;gap:12px;align-items:center;font-family:"Montserrat",sans-serif;font-weight:600;font-size:15px;color:#9AA6BF;transition:color .3s}
.etapas li i{width:28px;height:28px;border-radius:50%;border:2px solid #45567A;display:grid;place-items:center;font-style:normal;font-size:13px;transition:all .3s}
.etapas li.hecha{color:#AEB9CE}.etapas li.hecha i{background:#45567A;border-color:#45567A;color:#fff}
.etapas li.activa{color:#fff}.etapas li.activa i{background:var(--amarillo);border-color:var(--amarillo);color:var(--marino)}
.etapa-txt h3{color:#fff;font-size:24px;margin-bottom:8px}
.etapa-txt p{font-size:15px;min-height:96px}
.lecturas-torno{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px;margin-top:16px}
.lecturas-torno div{background:var(--marino-2);border-radius:8px;padding:8px 12px}
.lecturas-torno small{display:block;font-size:11px;color:#AEB9CE}
.lecturas-torno b{font-family:"Montserrat",sans-serif;color:#fff;font-size:17px}
.progreso-torno{height:4px;background:#2B3A58;border-radius:4px;margin-top:16px;overflow:hidden}
.progreso-torno span{display:block;height:100%;width:0;background:var(--amarillo)}
.giro{animation:giro .35s linear infinite}
@keyframes giro{to{stroke-dashoffset:-16}}

/* Procesos (pestañas) */
.procesos{margin-top:90px}
.tabs{display:flex;gap:6px;flex-wrap:wrap;border-bottom:2px solid #E1E5EC;margin-bottom:30px}
.tabs button{font:700 15px "Montserrat",sans-serif;color:#5C616B;background:none;border:0;padding:14px 18px;cursor:pointer;border-bottom:3px solid transparent;margin-bottom:-2px}
.tabs button[aria-selected="true"]{color:var(--marino);border-color:var(--amarillo)}
.tab-panel{display:grid;grid-template-columns:.9fr 1.1fr;gap:44px;align-items:center}
.tab-panel[hidden]{display:none}
.tab-vis{background:var(--marino);border-radius:12px;padding:20px;aspect-ratio:4/3;display:grid;place-items:center}
.tab-vis svg{width:100%;height:100%}
.tab-info h3{font-size:28px;margin-bottom:10px}
.tab-info>p{font-size:17px;margin-bottom:18px}
.ficha{width:100%;border-collapse:collapse;font-size:15px;margin-bottom:18px}
.ficha th{text-align:left;font-family:"Montserrat",sans-serif;color:var(--marino);font-weight:700;padding:9px 12px 9px 0;width:38%;vertical-align:top;border-top:1px solid #E1E5EC}
.ficha td{padding:9px 0;border-top:1px solid #E1E5EC}
.pc{background:#FFF4D6;border:1px dashed #E0A11E;border-radius:4px;padding:0 6px;color:#8A6200;font-weight:600}
.usos{display:flex;flex-wrap:wrap;gap:8px}
.usos span{background:var(--claro);border-radius:40px;padding:6px 14px;font-size:14px;font-weight:600;color:var(--marino)}

/* Materiales metálicos */
.mat-met{margin-top:90px;display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.mat-lista{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.mat-lista button{text-align:left;font:600 15px "Open Sans",sans-serif;color:var(--marino);background:#fff;border:2px solid #E1E5EC;border-radius:8px;padding:12px 14px;cursor:pointer;display:flex;gap:10px;align-items:center}
.mat-lista button i{width:18px;height:18px;border-radius:50%;flex:none}
.mat-lista button[aria-pressed="true"]{border-color:var(--marino);background:var(--marino);color:#fff}
.mat-card{background:var(--marino);color:#C9D2E3;border-radius:12px;padding:28px}
.mat-card h4{color:#fff;font-size:24px;margin-bottom:4px}
.mat-card .sub{color:var(--amarillo);font-family:"Montserrat",sans-serif;font-weight:700;font-size:14px;margin-bottom:12px}
.mat-card .barra-prop{grid-template-columns:150px 1fr;color:#C9D2E3}
.mat-card .barra-prop div{background:#2B3A58}
.mat-card .ej{margin-top:16px;font-size:15px}
.mat-card .ej b{color:#fff}

/* Industrias + cotizar */
.industrias{margin-top:90px}
.ind-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.ind{background:var(--claro);border-radius:10px;padding:20px 18px}
.ind svg{width:40px;height:40px;margin-bottom:10px}
.ind b{font-family:"Montserrat",sans-serif;color:var(--marino);display:block;font-size:17px;margin-bottom:4px}
.ind span{font-size:14px}
.rfq{margin-top:70px;background:var(--amarillo);border-radius:14px;padding:36px;display:grid;grid-template-columns:1fr 1.3fr;gap:36px;align-items:center}
.rfq h3{font-size:30px;margin-bottom:8px}
.rfq p{color:var(--marino)}
.rfq form{display:grid;grid-template-columns:1fr 1fr 110px;gap:12px;align-items:end}
.rfq label{font-family:"Montserrat",sans-serif;font-weight:700;color:var(--marino);font-size:13px;display:block;margin-bottom:6px}
.rfq select,.rfq input{border-color:#fff}
.rfq .btn{grid-column:1/-1;justify-content:center;background:var(--marino);border-color:var(--marino);color:#fff}
.rfq .btn:hover{background:var(--marino-3)}
.rfq small{grid-column:1/-1;color:var(--marino);font-size:13px}

/* ===== Impresión 3D ===== */
.p3d{background:var(--claro)}
.p3d-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.impresora{background:var(--marino);border-radius:12px;padding:28px}
.mat-info{background:#fff;border-radius:10px;padding:24px;margin-top:20px;box-shadow:0 10px 30px rgba(33,45,69,.08)}
.mat-info h4{font-size:22px;margin-bottom:6px}
.barra-prop{display:grid;grid-template-columns:130px 1fr;gap:10px;align-items:center;font-size:14px;margin-top:10px}
.barra-prop div{height:10px;background:#E4E8EF;border-radius:6px;overflow:hidden}
.barra-prop i{display:block;height:100%;background:var(--amarillo);border-radius:6px;transition:width .5s ease}
.flujo3d{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:80px}
.camino{background:#fff;border-radius:12px;padding:26px;box-shadow:0 10px 30px rgba(33,45,69,.07);position:relative}
.camino .q{font-family:"Montserrat",sans-serif;font-weight:800;color:#8A6200;font-size:14px}
.camino h3{font-size:21px;margin:6px 0 8px}
.camino p{font-size:15px}
.camino ul{list-style:none;margin-top:10px;font-size:14px}
.camino li{padding:3px 0 3px 20px;position:relative}
.camino li::before{content:"";position:absolute;left:0;top:11px;width:10px;height:3px;background:var(--amarillo)}
.lab{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:80px}
.lab-card{background:#fff;border-radius:12px;padding:28px;box-shadow:0 10px 30px rgba(33,45,69,.07)}
.lab-card h3{font-size:22px;margin-bottom:6px}
.lab-card>p{font-size:15px;margin-bottom:16px}
.lab-vis{background:var(--marino);border-radius:10px;padding:16px;margin-bottom:16px}
.lab-vis svg{width:100%;height:auto;display:block}
.lab-card .rango output{font-size:22px;min-width:80px}
.metricas{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:14px}
.metricas div{background:var(--claro);border-radius:8px;padding:10px 12px}
.metricas small{display:block;font-size:12px;color:#5C616B}
.metricas b{font-family:"Montserrat",sans-serif;color:var(--marino);font-size:18px}
.guia{margin-top:80px;display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.regla{background:#fff;border-radius:12px;padding:22px;box-shadow:0 10px 30px rgba(33,45,69,.07)}
.regla svg{width:100%;height:96px;margin-bottom:12px;background:var(--marino);border-radius:8px}
.regla b{font-family:"Montserrat",sans-serif;color:var(--marino);font-size:17px;display:block;margin-bottom:4px}
.regla span{font-size:14px}
.aplic{display:flex;flex-wrap:wrap;gap:10px;margin-top:40px}
.aplic span{background:var(--marino);color:#fff;padding:8px 16px;border-radius:40px;font-size:14px;font-weight:600}

@media (max-width:1000px){
  .mec-intro,.torno-panel,.tab-panel,.mat-met,.rfq,.p3d-grid,.lab{grid-template-columns:1fr}
  .torno-panel{padding:16px;gap:12px}
  .etapas{grid-template-columns:repeat(5,1fr);gap:4px;margin-bottom:10px}
  .etapas li{grid-template-columns:1fr;justify-items:center;font-size:11px;text-align:center;gap:4px}
  .etapa-txt h3{font-size:19px}.etapa-txt p{font-size:14px;min-height:0}
  .torno-scroll{height:380vh}
  .ind-grid{grid-template-columns:1fr 1fr}
  .flujo3d,.guia{grid-template-columns:1fr 1fr}
}
@media (max-width:620px){
  .datos-rapidos,.mat-lista,.flujo3d,.guia{grid-template-columns:1fr}
  .rfq{padding:24px}.rfq form{grid-template-columns:1fr}
  .tabs{flex-wrap:nowrap;overflow-x:auto}
  .tabs button{white-space:nowrap;padding:12px 12px}
  .lecturas-torno b{font-size:14px}
  .etapa-txt p{font-size:13px}
}
.vaiven{animation:vaiven 3s ease-in-out infinite alternate}
@keyframes vaiven{from{transform:translateX(60px)}to{transform:translateX(-90px)}}
.fresa-mov{animation:fresa 4s ease-in-out infinite}
.ranura{animation:ranura 4s ease-in-out infinite}
@keyframes fresa{0%{transform:translateX(0)}70%,100%{transform:translateX(180px)}}
@keyframes ranura{0%{width:0}70%,100%{width:180px}}
.arco{animation:arco .25s steps(2) infinite}
@keyframes arco{50%{opacity:.35}}
.traza{stroke-dasharray:1;stroke-dashoffset:1;animation:traza 4s ease-in-out infinite}
.corte{stroke-dasharray:1;stroke-dashoffset:1;animation:traza 5s linear infinite}
@keyframes traza{70%,100%{stroke-dashoffset:0}}
.engrane{animation:gira 6s linear infinite}
.engrane2{animation:gira 3.6s linear infinite reverse}

/* Proyectos */
.filtros{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:28px}
.filtros button{font:600 14px "Montserrat",sans-serif;background:transparent;color:#fff;border:2px solid #45567A;padding:8px 16px;border-radius:40px;cursor:pointer}
.filtros button[aria-pressed="true"]{background:var(--amarillo);color:var(--marino);border-color:var(--amarillo)}
.galeria{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.proy{background:var(--marino-2);border-radius:10px;overflow:hidden}
.proy[hidden]{display:none}
.foto{aspect-ratio:16/10;background:repeating-linear-gradient(135deg,#34466A 0 12px,#30416360 12px 24px);display:grid;place-items:center;color:#AEB9CE;font-size:13px}
.proy-b{padding:20px 22px 24px}
.proy-l{font-size:12px;font-weight:700;color:var(--amarillo);font-family:"Montserrat",sans-serif}
.proy h3{font-size:20px;margin:6px 0 8px}
.proy p{font-size:15px;color:#AEB9CE}

/* Estudiantes */
.est-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.ruta{position:relative;padding-left:34px}
.ruta::before{content:"";position:absolute;left:11px;top:10px;bottom:10px;width:3px;background:linear-gradient(var(--amarillo),var(--marino))}
.ruta div{position:relative;padding:0 0 26px}
.ruta div::before{content:"";position:absolute;left:-31px;top:6px;width:19px;height:19px;border-radius:50%;background:#fff;border:4px solid var(--amarillo)}
.ruta b{font-family:"Montserrat",sans-serif;color:var(--marino);font-size:19px;display:block}

/* Calidad */
.cal-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cal{background:#fff;border-radius:10px;padding:28px;box-shadow:0 10px 30px rgba(33,45,69,.08)}
.cal svg{width:44px;height:44px;margin-bottom:14px}
.cal h3{font-size:21px;margin-bottom:8px}
.marcas{display:flex;flex-wrap:wrap;gap:12px 44px;align-items:center;margin-top:48px}
.marcas small{width:100%;font-size:14px}
.marcas span{font-family:"Montserrat",sans-serif;font-weight:800;font-size:26px;color:#6E7480}

/* Nosotros */
.nos-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:64px;align-items:center}
.nos-grid p{margin-bottom:14px;font-size:18px}
.equipo{display:grid;gap:16px}
.persona{display:grid;grid-template-columns:78px 1fr;gap:18px;align-items:center;background:var(--claro);border-radius:10px;padding:18px}
.avatar{width:78px;height:78px;border-radius:50%;background:var(--amarillo);display:grid;place-items:center;font-family:"Montserrat",sans-serif;font-weight:800;color:var(--marino);font-size:24px}
.persona b{font-family:"Montserrat",sans-serif;color:var(--marino);font-size:19px;display:block}
.persona span{font-size:14px}

/* FAQ */
.faq{max-width:860px}
details{border-bottom:1px solid #E1E5EC}
summary{list-style:none;cursor:pointer;padding:22px 44px 22px 0;font-family:"Montserrat",sans-serif;font-weight:700;font-size:19px;color:var(--marino);position:relative}
summary::-webkit-details-marker{display:none}
summary::after{content:"";position:absolute;right:8px;top:28px;width:14px;height:14px;border-right:3px solid #8A6200;border-bottom:3px solid #8A6200;transform:rotate(45deg);transition:transform .2s}
details[open] summary::after{transform:rotate(-135deg);top:34px}
details p{padding:0 44px 22px 0}

/* Contacto */
.cont-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.form{background:#fff;border-radius:12px;padding:34px;color:var(--texto)}
.form h3{font-size:24px;margin-bottom:4px}
.form .sub{font-size:14px;margin-bottom:22px}
.form .fila{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form .campo{margin-bottom:16px}
input[type=text],select,textarea{width:100%;font:inherit;font-size:16px;padding:12px 14px;border:2px solid #D6DBE4;border-radius:6px;background:#fff;color:var(--texto)}
input:focus,select:focus,textarea:focus{border-color:var(--marino);outline:none}
textarea{min-height:110px;resize:vertical}
.error{color:#B42318;font-size:13px;margin-top:4px;display:none}
.campo.invalido .error{display:block}
.campo.invalido input,.campo.invalido select{border-color:#B42318}
.datos{display:grid;gap:22px}
.dato{display:grid;grid-template-columns:48px 1fr;gap:16px;align-items:start}
.dato .ic{width:48px;height:48px;border-radius:50%;background:var(--amarillo);display:grid;place-items:center}
.dato .ic svg{width:22px;height:22px}
.dato small{display:block;color:#AEB9CE;font-size:13px}
.dato b,.dato a{color:#fff;font-size:17px;font-weight:600}
.redes{display:flex;gap:12px;margin-top:6px}
.redes a{width:44px;height:44px;border-radius:50%;border:2px solid #45567A;display:grid;place-items:center}
.redes a:hover{border-color:var(--amarillo)}
.redes svg{width:20px;height:20px}

footer{background:var(--marino-3);color:#AEB9CE;font-size:14px;padding:30px 0}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;align-items:center}
footer .logo svg{width:40px;height:40px}
footer .logo b{font-size:16px}

.wa-float{position:fixed;right:22px;bottom:22px;z-index:30;width:60px;height:60px;border-radius:50%;background:var(--wa);display:grid;place-items:center;box-shadow:0 8px 22px rgba(0,0,0,.3)}
.wa-float svg{width:32px;height:32px}


/* ===== v4: portada con foto ===== */
.portada{position:relative;min-height:94vh;min-height:94svh;display:flex;align-items:flex-end;padding:150px 0 70px;background:var(--marino-3);overflow:hidden;color:#fff}
.portada-bg{position:absolute;inset:0}
.portada-bg img{width:100%;height:100%;object-fit:cover;animation:ken 34s ease-in-out infinite alternate}
@keyframes ken{from{transform:scale(1.04)}to{transform:scale(1.14) translate(-1.5%,-1%)}}
.portada-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(24,33,58,.72) 0%,rgba(24,33,58,.35) 38%,rgba(24,33,58,.55) 62%,rgba(24,33,58,.96) 100%)}
.portada .wrap{position:relative;z-index:1;width:100%}
.portada .hola{color:var(--amarillo)}
.portada h1{color:#fff;font-size:clamp(44px,6.6vw,92px);font-weight:800;letter-spacing:-.015em;max-width:13ch;line-height:1.02}
.portada .lead{font-size:clamp(17px,1.6vw,20px);margin:22px 0 30px;max-width:36em;color:#E3E8F1}
.portada-pie{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;flex-wrap:wrap}
.accesos{display:grid;grid-template-columns:repeat(4,minmax(0,170px));gap:10px;margin-top:38px}
.accesos a{display:block;text-decoration:none;color:#fff;background:rgba(33,45,69,.55);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.18);border-radius:10px;padding:14px 16px;transition:border-color .2s,background .2s}
.accesos a:hover{border-color:var(--amarillo);background:rgba(33,45,69,.8)}
.accesos b{font-family:"Montserrat",sans-serif;font-size:15px;display:block}
.accesos span{font-size:13px;color:#C9D2E3}
.foto-cap{font-size:12px;color:#AEB9CE;max-width:22em;text-align:right}
.confianza{background:var(--marino-3);color:#AEB9CE;border-top:1px solid #2B3A58}
.confianza .wrap{display:flex;flex-wrap:wrap;gap:10px 34px;align-items:center;justify-content:space-between;padding-top:18px;padding-bottom:18px;font-size:14px}
.confianza b{color:#fff;font-family:"Montserrat",sans-serif;font-weight:700}
.confianza .sep{display:flex;gap:28px;flex-wrap:wrap}

/* explora */
.explora{background:radial-gradient(1000px 520px at 75% 40%,#2E3F63 0%,var(--marino) 55%,var(--marino-3) 100%)}
.explora .hero-grid{padding:0 24px}

/* fotos de obra */
.fotos-obra{display:grid;grid-template-columns:1.6fr 1fr 1fr;grid-template-rows:240px 240px;gap:12px;margin-top:70px}
.fotos-obra figure{position:relative;border-radius:12px;overflow:hidden;margin:0;background:var(--marino)}
.fotos-obra figure:first-child{grid-row:span 2}
.fotos-obra img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .8s ease}
.fotos-obra figure:hover img{transform:scale(1.05)}
.fotos-obra figcaption{position:absolute;left:0;right:0;bottom:0;padding:26px 14px 12px;background:linear-gradient(transparent,rgba(24,33,58,.85));color:#fff;font-size:14px;font-weight:600}
.ampliar{cursor:zoom-in}

/* ahorro */
.res.ancho{grid-column:1/-1;display:flex;justify-content:space-between;align-items:center;background:var(--amarillo)}
.res.ancho small{color:var(--marino);font-weight:600}
.res.ancho strong{color:var(--marino)}
.res.ancho strong em{color:var(--marino)}

/* EV: cotiza con fotos */
.ev-cotiza{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;margin-top:90px}
.ev-collage{display:grid;grid-template-columns:1.2fr 1fr;gap:12px}
.ev-collage figure{margin:0;border-radius:12px;overflow:hidden;position:relative}
.ev-collage figure:first-child{grid-row:span 2}
.ev-collage img{width:100%;height:100%;object-fit:cover;display:block;aspect-ratio:3/4}
.ev-collage figure:not(:first-child) img{aspect-ratio:3/4.1}
.ev-collage figcaption{position:absolute;left:10px;bottom:10px;background:rgba(24,33,58,.82);color:#fff;font-size:13px;padding:5px 10px;border-radius:20px}
.pasos-ev{list-style:none;counter-reset:pe;display:grid;gap:12px;margin:20px 0 24px}
.pasos-ev li{counter-increment:pe;display:grid;grid-template-columns:40px 1fr;gap:14px;align-items:start}
.pasos-ev li::before{content:counter(pe);width:40px;height:40px;border-radius:50%;background:var(--amarillo);color:var(--marino);display:grid;place-items:center;font-family:"Montserrat",sans-serif;font-weight:800}
.pasos-ev b{color:#fff;font-family:"Montserrat",sans-serif;display:block}
.pasos-ev span{font-size:15px}
.form-ev{display:grid;grid-template-columns:1fr 1fr;gap:12px;background:var(--marino-2);padding:20px;border-radius:12px}
.form-ev label{display:block;font-family:"Montserrat",sans-serif;font-weight:700;font-size:13px;color:#fff;margin-bottom:6px}
.form-ev .btn{grid-column:1/-1;justify-content:center}
.precio-desde{display:flex;gap:18px;flex-wrap:wrap;margin-top:14px;font-size:14px}
.precio-desde b{color:#fff}

/* visor 3D */
.visor{background:var(--marino);border-radius:14px;padding:20px;color:#C9D2E3}
.visor-canvas{position:relative;height:380px;border-radius:10px;background:radial-gradient(circle at 50% 40%,#2E3F63,#18213A 75%);overflow:hidden;cursor:grab;touch-action:pan-y}
.visor-canvas:active{cursor:grabbing}
.visor-canvas canvas{display:block;width:100%;height:100%}
.visor-hint{position:absolute;left:12px;top:10px;font-size:12px;color:#AEB9CE;pointer-events:none}
.visor-fallback{position:absolute;inset:0;display:none;place-items:center;text-align:center;padding:20px;color:#AEB9CE}
.visor-top{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px;flex-wrap:wrap}
.visor-top .chips label{padding:7px 13px;font-size:13px}
.visor .chips label{border-color:#45567A;color:#fff}
.visor .chips input:checked+label{background:var(--amarillo);border-color:var(--amarillo);color:var(--marino)}
.toggle{display:flex;align-items:center;gap:8px;font-size:14px;color:#fff;cursor:pointer}
.toggle input{accent-color:var(--amarillo);width:18px;height:18px}

/* proyectos v4 */
.proy{border-top:4px solid var(--amarillo)}
.proy .foto-real{aspect-ratio:16/10;overflow:hidden}
.proy .foto-real img{width:100%;height:100%;object-fit:cover;display:block}
.mosaico{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:190px;gap:10px;margin-bottom:40px}
.mosaico button{padding:0;border:0;border-radius:10px;overflow:hidden;cursor:zoom-in;background:#2B3A58}
.mosaico button:nth-child(1){grid-column:span 2;grid-row:span 2}
.mosaico img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .6s ease}
.mosaico button:hover img{transform:scale(1.06)}
dialog.lightbox{border:0;padding:0;background:transparent;max-width:92vw;max-height:90vh}
dialog.lightbox::backdrop{background:rgba(10,14,26,.88)}
dialog.lightbox img{max-width:92vw;max-height:84vh;display:block;border-radius:8px}
dialog.lightbox p{color:#fff;text-align:center;margin-top:10px;font-size:15px}
dialog.lightbox button{position:absolute;top:-6px;right:-6px;width:40px;height:40px;border-radius:50%;border:0;background:var(--amarillo);color:var(--marino);font-size:22px;font-weight:800;cursor:pointer}

@media (max-width:1000px){
  .accesos{grid-template-columns:repeat(2,1fr)}
  .fotos-obra{grid-template-columns:1fr 1fr;grid-template-rows:200px 200px 200px}
  .fotos-obra figure:first-child{grid-column:span 2;grid-row:span 1}
  .ev-cotiza{grid-template-columns:1fr}
  .mosaico{grid-template-columns:1fr 1fr;grid-auto-rows:150px}
  .foto-cap{display:none}
}
@media (max-width:620px){
  .portada{padding-top:120px;min-height:auto}
  .portada-bg::after{background:linear-gradient(180deg,rgba(24,33,58,.8),rgba(24,33,58,.72) 50%,rgba(24,33,58,.95))}
  .form-ev{grid-template-columns:1fr}
  .visor-canvas{height:300px}
  .confianza .wrap{justify-content:flex-start}
}
@media (prefers-reduced-motion:reduce){.portada-bg img{animation:none}}

.ev-claro .ev-panel .chips label{border-color:#45567A;color:#fff}
.ev-claro .ev-panel .chips input:checked+label{background:var(--amarillo);border-color:var(--amarillo);color:var(--marino)}
.ev-claro .check b,.ev-claro .pasos-ev b,.ev-claro .precio-desde b{color:var(--marino)}
.ev-claro .check span,.ev-claro .pasos-ev span{color:var(--texto)}

/* ===== v5 ===== */
.nav ul{gap:22px}.nav ul a{font-size:14px}
.accesos{grid-template-columns:repeat(3,minmax(0,200px))}
/* ingeniería */
.ing-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:start}
.ing-fig{margin:0;background:#fff;border-radius:14px;overflow:hidden;box-shadow:0 20px 50px rgba(33,45,69,.12)}
.ing-fig img{width:100%;display:block}
.ing-fig figcaption{padding:12px 16px;font-size:14px;color:#5C616B;border-top:1px solid #E1E5EC}
.etapas-ing{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:16px}
.etapas-ing button{font:700 14px "Montserrat",sans-serif;border:2px solid #D6DBE4;background:#fff;color:var(--marino);border-radius:40px;padding:8px 14px;cursor:pointer;display:flex;gap:8px;align-items:center}
.etapas-ing button i{font-style:normal;width:22px;height:22px;border-radius:50%;background:var(--claro);display:grid;place-items:center;font-size:12px}
.etapas-ing button[aria-selected="true"]{background:var(--marino);border-color:var(--marino);color:#fff}
.etapas-ing button[aria-selected="true"] i{background:var(--amarillo);color:var(--marino)}
.etapa-card{background:var(--marino);color:#C9D2E3;border-radius:14px;padding:28px}
.etapa-card h3{color:#fff;font-size:26px;margin-bottom:8px}
.etapa-card .que{margin-top:16px;padding-top:14px;border-top:1px solid #34466A;font-size:15px}
.etapa-card .que b{color:var(--amarillo);font-family:"Montserrat",sans-serif;display:block;margin-bottom:6px;font-size:14px}
.etapa-card ul{list-style:none;display:grid;gap:4px}
.etapa-card li{padding-left:18px;position:relative}
.etapa-card li::before{content:"";position:absolute;left:0;top:11px;width:9px;height:3px;background:var(--amarillo)}
.etapa-vis{height:150px;margin:-6px 0 14px;border-radius:10px;background:var(--marino-2);display:grid;place-items:center}
.etapa-vis svg{height:130px;width:auto}
.entregables{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:70px}
.entregable{background:#fff;border-radius:12px;padding:22px;box-shadow:0 10px 30px rgba(33,45,69,.07);display:grid;grid-template-columns:44px 1fr;gap:14px;align-items:start}
.entregable svg{width:44px;height:44px}
.entregable b{font-family:"Montserrat",sans-serif;color:var(--marino);font-size:17px;display:block;margin-bottom:2px}
.entregable span{font-size:14px}
.software{display:flex;flex-wrap:wrap;gap:10px 30px;margin-top:34px;align-items:center;font-size:15px}
.software b{font-family:"Montserrat",sans-serif;color:var(--marino)}
/* estructuras */
.est-fotos{display:grid;grid-template-columns:1fr 1fr 1fr 1fr;grid-template-rows:250px 250px;gap:12px;margin-bottom:70px}
.est-fotos .f-dolly{grid-column:2/4;grid-row:1}.est-fotos .f-chasis{grid-column:1;grid-row:1/3}.est-fotos .f-rack{grid-column:4;grid-row:1/3}.est-fotos .f-marco{grid-column:2;grid-row:2}.est-fotos .f-sold{grid-column:3;grid-row:2}
.est-fotos figure{margin:0;position:relative;border-radius:12px;overflow:hidden;background:var(--marino-2)}
.est-fotos img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .8s ease}
.est-fotos figure:hover img{transform:scale(1.05)}
.est-fotos figcaption{position:absolute;left:0;right:0;bottom:0;padding:26px 14px 12px;background:linear-gradient(transparent,rgba(24,33,58,.88));color:#fff;font-size:14px;font-weight:600}
.tipos-est{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:80px}
.tipo{background:var(--marino-2);border-radius:12px;padding:22px;border-left:4px solid var(--amarillo)}
.tipo b{font-family:"Montserrat",sans-serif;color:#fff;font-size:18px;display:block;margin-bottom:6px}
.tipo span{font-size:15px}
.viga-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:40px;align-items:center}
.viga-panel{background:var(--marino-2);border-radius:14px;padding:28px}
.viga-panel label.l{color:#fff}
.viga-panel select{background:#fff}
.viga-panel .rango output{color:#fff;font-size:22px;min-width:96px}
.viga-vis{background:var(--marino-3);border-radius:14px;padding:18px}
.viga-vis svg{width:100%;height:auto;display:block}
.veredicto{display:flex;gap:12px;align-items:center;margin-top:14px;padding:14px 16px;border-radius:10px;font-family:"Montserrat",sans-serif;font-weight:700}
.veredicto.ok{background:rgba(37,165,95,.18);color:#7CE0A3}
.veredicto.mal{background:rgba(227,138,138,.18);color:#F2A9A9}
.viga-res{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px}
.viga-res div{background:var(--marino-2);border-radius:8px;padding:10px 12px}
.viga-res small{display:block;font-size:12px;color:#AEB9CE}
.viga-res b{font-family:"Montserrat",sans-serif;color:#fff;font-size:20px}
.uso-bar{height:8px;background:#2B3A58;border-radius:6px;margin-top:6px;overflow:hidden}
.uso-bar i{display:block;height:100%;border-radius:6px;transition:width .3s,background .3s}
.pasos-est{display:flex;flex-wrap:wrap;gap:8px;margin-top:60px;list-style:none;counter-reset:pe2}
.pasos-est li{counter-increment:pe2;background:var(--marino-2);border-radius:40px;padding:8px 16px 8px 8px;display:flex;align-items:center;gap:10px;font-weight:600;color:#fff;font-size:15px}
.pasos-est li::before{content:counter(pe2);width:28px;height:28px;border-radius:50%;background:var(--amarillo);color:var(--marino);display:grid;place-items:center;font-family:"Montserrat",sans-serif;font-weight:800;font-size:13px}
/* mecanizado: fotos y repuestos */
.mec-fotos{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin-top:70px}
.mec-fotos figure{margin:0;border-radius:10px;overflow:hidden;position:relative;aspect-ratio:3/4}
.mec-fotos figure:first-child{grid-column:span 2;aspect-ratio:auto}
.mec-fotos img{width:100%;height:100%;object-fit:cover;display:block}
.mec-fotos figcaption{position:absolute;left:8px;bottom:8px;background:rgba(24,33,58,.82);color:#fff;font-size:12px;padding:4px 10px;border-radius:20px}
.repuestos{margin-top:100px}
.rep-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.rep{background:var(--claro);border-radius:12px;overflow:hidden}
.rep img{width:100%;aspect-ratio:4/3;object-fit:cover;display:block}
.rep div{padding:16px 18px 20px}
.rep b{font-family:"Montserrat",sans-serif;color:var(--marino);font-size:17px;display:block;margin-bottom:4px}
.rep span{font-size:14px}
.rep-ruta{display:flex;flex-wrap:wrap;gap:8px 0;align-items:center;margin:26px 0 30px;font-weight:600;color:var(--marino);font-size:15px}
.rep-ruta span{background:#fff;border:2px solid var(--amarillo);border-radius:40px;padding:6px 14px}
.rep-ruta i{width:26px;height:2px;background:var(--amarillo);display:inline-block}
.ia-nota{font-size:13px;color:#5C616B;margin-top:12px}
@media (max-width:1180px){
  .nav ul{display:none;position:absolute;top:78px;left:0;right:0;background:var(--marino);flex-direction:column;align-items:flex-start;padding:16px 24px 26px;gap:18px}
  .nav ul.abierto{display:flex}
  .menu-btn{display:block}
}
@media (max-width:1000px){
  .ing-grid,.viga-grid{grid-template-columns:1fr}
  .entregables,.tipos-est{grid-template-columns:1fr 1fr}
  .est-fotos{grid-template-columns:1fr 1fr;grid-template-rows:220px 220px 220px}
  .est-fotos .f-dolly{grid-column:1/3;grid-row:1}.est-fotos .f-chasis{grid-column:1;grid-row:2}.est-fotos .f-rack{grid-column:2;grid-row:2}.est-fotos .f-marco{grid-column:1;grid-row:3}.est-fotos .f-sold{grid-column:2;grid-row:3}
  .mec-fotos{grid-template-columns:1fr 1fr}
  .mec-fotos figure:first-child{aspect-ratio:4/3}
  .rep-grid{grid-template-columns:1fr 1fr}
  .accesos{grid-template-columns:1fr 1fr}
}
@media (max-width:620px){
  .entregables,.tipos-est,.rep-grid{grid-template-columns:1fr}
  .viga-panel{padding:20px}
}

/* Responsive */
@media (max-width:1000px){
  .hero-grid,.solar-grid,.sim-box,.ev-grid,.p3d-grid,.est-grid,.nos-grid,.cont-grid{grid-template-columns:1fr}
  .hero{min-height:auto}
  .sticky{position:sticky;top:78px;z-index:2}
  .diagrama{padding:14px}
  .pasos-solar{gap:40vh;padding-top:4vh}
  .paso{background:#fff;padding:14px 18px;border-radius:0 8px 8px 0;box-shadow:0 6px 20px rgba(33,45,69,.1)}
  .lineas-barra .wrap{grid-template-columns:1fr 1fr;padding:0}
  .lineas-barra a{border-bottom:1px solid rgba(33,45,69,.18)}
  .mec-pasos{grid-template-columns:1fr 1fr}
  .galeria,.cal-grid{grid-template-columns:1fr 1fr}
  .nav ul{display:none;position:absolute;top:78px;left:0;right:0;background:var(--marino);flex-direction:column;align-items:flex-start;padding:16px 24px 26px;gap:18px}
  .nav ul.abierto{display:flex}
  .menu-btn{display:block}
}
@media (max-width:620px){
  body{font-size:16px}
  section{padding:76px 0}
  .lineas-barra a{padding:16px 12px;gap:10px}
  .lineas-barra svg{width:30px;height:30px}
  .lineas-barra small{display:none}
  .mec-pasos,.galeria,.cal-grid,.form .fila,.res-grid{grid-template-columns:1fr}
  .lectura,.ev-res{grid-template-columns:1fr 1fr 1fr}
  .lectura b,.ev-res b{font-size:17px}
  .sim-in,.sim-out,.form,.ev-panel{padding:24px}
  .hora{flex-wrap:wrap}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .revela{opacity:1;transform:none}
}

/* v6 */
.limite{font-size:14px;color:#E9EDF4;background:#18213A;border-left:3px solid var(--amarillo);padding:10px 12px;border-radius:6px;margin:14px 0 0}
.limite b{color:var(--amarillo)}
.precios-ev{grid-column:1/-1;margin-top:40px}
.tabla-precio{width:100%;border-collapse:collapse;font-size:15px;background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 1px 0 #E3E7EF}
.tabla-precio th,.tabla-precio td{padding:14px 16px;text-align:left;border-bottom:1px solid #E3E7EF}
.tabla-precio thead th{background:var(--marino);color:#fff;font-family:Montserrat,sans-serif;font-size:13px;font-weight:700}
.tabla-precio tbody th{font-family:Montserrat,sans-serif;color:var(--marino)}
.tabla-precio td b{font-size:20px;color:var(--marino);font-family:Montserrat,sans-serif}
.incluye{list-style:none;padding:0;margin:18px 0 0;display:grid;gap:6px;font-size:15px}
.incluye b{color:var(--marino)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.privacidad-nota{font-size:13px;margin:10px 0 0;color:inherit;opacity:.85}
.privacidad-nota a,footer a[data-priv]{color:inherit;text-decoration:underline}
dialog.priv{max-width:620px;width:calc(100% - 32px);border:0;border-radius:14px;padding:28px;color:var(--texto)}
dialog.priv::backdrop{background:rgba(10,14,26,.7)}
dialog.priv h2{font-size:24px;margin-bottom:8px;color:var(--marino)}
dialog.priv dt{font-family:Montserrat,sans-serif;font-weight:700;color:var(--marino);margin-top:12px}
dialog.priv dd{margin:2px 0 0}
dialog.priv .btn{margin-top:20px}
@media(max-width:640px){.tabla-precio th,.tabla-precio td{padding:10px 8px;font-size:13px}.tabla-precio td b{font-size:16px}}

/* v7: sitio multipágina */
body.sub header{background:rgba(33,45,69,.97);box-shadow:0 2px 20px rgba(0,0,0,.25)}
body.sub main>section:first-child{padding-top:150px}
.cab h1{font-size:clamp(32px,4vw,50px);font-weight:800}
.miga{font-size:14px;margin-bottom:22px;opacity:.85}
.miga a{color:inherit}
#menu a[aria-current="page"]{color:var(--amarillo)}
.lineas-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.linea-card{background:#fff;border:1px solid #E1E5EC;border-radius:14px;overflow:hidden;display:flex;flex-direction:column}
.linea-media{display:block;aspect-ratio:16/10;background:var(--marino);overflow:hidden}
.linea-media img,.linea-media svg{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s}
.linea-card:hover .linea-media img{transform:scale(1.04)}
.linea-txt{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1}
.linea-txt h3{font-size:21px;margin-bottom:8px}
.linea-txt h3 a{color:inherit;text-decoration:none}
.linea-txt p{font-size:15px}
.linea-txt ul{list-style:none;padding:0;margin:14px 0 20px;font-size:14px;display:grid;gap:6px}
.linea-txt li{padding-left:18px;position:relative}
.linea-txt li::before{content:"";position:absolute;left:0;top:.55em;width:8px;height:8px;border-radius:50%;background:var(--amarillo)}
.linea-txt .btn{margin-top:auto;align-self:flex-start}
.cierre{border-top:1px solid #34466A;text-align:left}
.cierre h2{font-size:clamp(28px,3.4vw,42px);margin-bottom:12px}
.cierre p{max-width:40em;margin-bottom:24px}
.cierre .privacidad-nota{margin:14px 0 0}
.otras{display:flex;flex-wrap:wrap;gap:10px 12px;align-items:center;margin-top:44px;padding-top:26px;border-top:1px solid #34466A;font-size:14px}
.otras span{font-family:"Montserrat",sans-serif;font-weight:700;color:#fff;margin-right:6px}
.otras a{color:#E9EDF4;text-decoration:none;border:1px solid #45567A;border-radius:999px;padding:7px 14px}
.otras a:hover{border-color:var(--amarillo);color:var(--amarillo)}
@media(max-width:980px){.lineas-grid{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.lineas-grid{grid-template-columns:1fr}body.sub main>section:first-child{padding-top:120px}}

/* v8: configuradores y pestañas a páginas */
.ir-pagina{display:flex;justify-content:space-between;align-items:center;gap:18px;margin-top:56px;padding:20px 24px;border-radius:12px;background:var(--amarillo);color:var(--marino);text-decoration:none;font-family:"Montserrat",sans-serif;font-weight:700;font-size:17px;transition:transform .2s}
.ir-pagina:hover{transform:translateY(-2px)}
.ir-pagina b{flex:none;background:var(--marino);color:#fff;border-radius:6px;padding:10px 18px;font-size:14px}
.kit-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:28px;align-items:start}
.kpaso{border:1px solid #DCE1EA;border-radius:14px;background:#fff;padding:22px 22px 24px;margin:0 0 16px;min-width:0}
.kpaso legend{font-family:"Montserrat",sans-serif;font-weight:700;color:var(--marino);font-size:18px;padding:0 8px;display:flex;align-items:center;gap:10px}
.kn{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--amarillo);color:var(--marino);font-size:15px}
.kpaso.apagado,.chips.apagado,.ksub.apagado{opacity:.45}
.kpaso.apagado .chips,.chips.apagado{pointer-events:none}
.kayuda{font-size:14px;margin:12px 0 0;color:var(--texto)}
.kayuda a{color:inherit}
.ksub{display:block;font-family:"Montserrat",sans-serif;font-weight:700;color:var(--marino);font-size:14px;margin:16px 0 8px}
.ksub:first-of-type{margin-top:4px}
.kdos{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:16px}
.kdos label{font-size:14px;font-weight:600;color:var(--marino);display:grid;gap:6px}
.kdos input{font:inherit;font-size:20px;font-weight:700;padding:10px 12px;border:2px solid #D6DBE4;border-radius:8px;width:100%;color:var(--marino)}
.kslider{display:block;margin-top:18px;font-size:15px;font-weight:600;color:var(--marino)}
.kslider input{display:block;width:100%;margin-top:8px;accent-color:#8A6200}
.subir{display:grid;gap:4px;border:2px dashed #AEB9CE;border-radius:12px;padding:18px;cursor:pointer;text-align:center;background:#F8F9FB}
.subir:hover,.subir:focus-within{border-color:var(--marino)}
.subir input{position:absolute;opacity:0;width:1px;height:1px}
.subir b{font-family:"Montserrat",sans-serif;color:var(--marino)}
.subir small{font-size:13px;color:var(--texto)}
#k-prev{display:block;max-height:220px;max-width:100%;margin:14px auto 0;border-radius:8px}
.kit-out{position:sticky;top:96px;background:var(--marino);color:#C9D2E3;border-radius:14px;padding:22px}
.kit-out svg{width:100%;height:auto;display:block;border-radius:12px}
.kit-out h3{color:#fff;font-size:20px;margin:18px 0 10px}
.kit-out ul{list-style:none;padding:0;margin:0;font-size:14px}
.kit-out li{display:flex;justify-content:space-between;gap:14px;padding:8px 0;border-bottom:1px solid #34466A}
.kit-out li b{color:#fff;white-space:nowrap}
.k-total{margin:18px 0 14px;padding:16px 18px;border-radius:10px;background:#18213A}
.k-total small{display:block;font-size:13px;color:#AEB9CE}
.k-total b{display:block;font-family:"Montserrat",sans-serif;font-size:clamp(26px,3vw,34px);color:var(--amarillo);line-height:1.2}
.k-total span{font-size:13px;color:#AEB9CE}
.k-total.claro{background:var(--marino)}
.k-kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:16px}
.k-kpis div{background:var(--marino-2);border-radius:8px;padding:10px 12px}
.k-kpis small{display:block;font-size:12px;color:#AEB9CE}
.k-kpis b{font-family:"Montserrat",sans-serif;color:#fff;font-size:17px}
.kit-out .btn{width:100%;justify-content:center}
.chips.osc label{border-color:#45567A;color:#fff}
.chips.osc input:checked+label{background:var(--amarillo);border-color:var(--amarillo);color:var(--marino)}
.ev3d-grid{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:28px;align-items:start}
.ev3d-box{position:relative;background:linear-gradient(#2B3A58,#18213A);border-radius:14px;overflow:hidden}
#ev3d{width:100%;aspect-ratio:16/10;touch-action:pan-y;cursor:grab}
#ev3d canvas{display:block}
.ev3d-hud{position:absolute;left:16px;top:14px;display:grid;pointer-events:none}
.ev3d-hud b{font-family:"Montserrat",sans-serif;font-size:38px;color:#fff;line-height:1}
.ev3d-hud span{font-size:14px;color:#E9EDF4}
.ev3d-fb{position:absolute;inset:0;display:grid;place-items:center;padding:30px;text-align:center}
.ev3d-ctl{background:var(--marino-2);border-radius:14px;padding:24px}
.casa-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:28px;align-items:start}
.casa-lienzo{position:relative;border-radius:14px;overflow:hidden;background:#E9EDF4}
#casa-c{display:block;width:100%;height:auto;cursor:crosshair}
.casa-subir{position:absolute;inset:0;border-radius:14px;align-content:center;background:rgba(248,249,251,.96)}
.casa-subir.chico{inset:auto 12px 12px auto;padding:8px 14px;border-style:solid;border-width:1px;background:#fff}
.casa-subir.chico small{display:none}
.casa-pasos{margin:0 0 6px;padding-left:22px;display:grid;gap:8px;font-size:15px}
.casa-pasos li.act{font-weight:700;color:var(--marino)}
.casa-pasos li.ok{text-decoration:line-through;opacity:.6}
@media(max-width:900px){.kit-grid,.ev3d-grid,.casa-grid{grid-template-columns:1fr}.kit-out{position:static}.ir-pagina{flex-direction:column;align-items:flex-start;font-size:16px}}
@media(max-width:480px){.kdos{grid-template-columns:1fr}.k-kpis{grid-template-columns:1fr}.kpaso{padding:18px 14px}}
[hidden]{display:none!important}
.tipos-inst{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.tipos-inst article{border:1px solid #DCE1EA;border-radius:14px;padding:18px 18px 20px;background:#fff}
.tipos-inst svg{width:100%;height:auto;border-radius:10px;display:block;margin-bottom:14px}
.tipos-inst h3{font-size:20px;margin-bottom:6px}
.tipos-inst p{font-size:15px}
.tipos-inst ul{margin:10px 0 0;padding-left:18px;font-size:14px;display:grid;gap:4px}
.kcheck{display:flex;gap:10px;align-items:center;margin-top:14px;font-size:15px;color:var(--marino);font-weight:600}
.kcheck input{width:20px;height:20px;accent-color:#8A6200}
.k-kpis{grid-template-columns:repeat(3,1fr)}
#k-flujo{margin-top:4px}
.logo img{width:52px;height:52px;border-radius:8px;display:block}
footer .logo img{width:40px;height:40px}
@media(max-width:900px){.tipos-inst{grid-template-columns:1fr}}
@media(max-width:480px){.k-kpis{grid-template-columns:1fr 1fr}}
.tira{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.tira.dos{grid-template-columns:repeat(2,1fr);max-width:860px}
.tira.uno{grid-template-columns:1fr}
.tira figure{margin:0;border-radius:14px;overflow:hidden;background:#fff;border:1px solid #DCE1EA}
.tira img{width:100%;aspect-ratio:4/3;object-fit:cover;display:block}
.tira.uno img{aspect-ratio:16/8}
.tira figcaption{padding:14px 16px 16px;font-size:14px}
.tira figcaption b{display:block;font-family:"Montserrat",sans-serif;color:var(--marino);font-size:16px;margin-bottom:2px}
.tierra{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.5fr) minmax(0,.7fr);gap:26px;align-items:center;margin-top:44px;padding:24px;border-radius:14px;background:var(--claro)}
.tierra figure{margin:0;border-radius:12px;overflow:hidden;position:relative}
.tierra img{width:100%;aspect-ratio:4/5;object-fit:cover;display:block}
.tierra figcaption{font-size:13px;padding:8px 10px;background:#fff}
.tierra h3{font-size:24px;margin-bottom:8px}
.tierra ul{margin:12px 0 0;padding-left:20px;display:grid;gap:8px;font-size:15px}
.diseno-video{margin:0 0 32px;border-radius:14px;overflow:hidden;background:#fff;border:1px solid #DCE1EA}
.diseno-video video{display:block;width:100%;aspect-ratio:1920/856;background:#fff}
.diseno-video figcaption{padding:12px 16px;font-size:14px}
@media(max-width:900px){.tira,.tira.dos{grid-template-columns:1fr}.tierra{grid-template-columns:1fr}.tierra figure{max-width:320px}}
.casa-lista{list-style:none;padding:0;margin:18px 0 0;font-size:14px}
.casa-lista li{display:flex;justify-content:space-between;gap:12px;padding:7px 0;border-bottom:1px solid #DCE1EA}
.casa-lista b{color:var(--marino);white-space:nowrap}
.est-principal{margin:0 0 14px;border-radius:14px;overflow:hidden;position:relative}
.est-principal img{display:block;width:100%;aspect-ratio:1600/714;object-fit:cover}
.est-principal figcaption{position:absolute;left:14px;bottom:14px;background:rgba(24,33,58,.85);color:#fff;font-family:"Montserrat",sans-serif;font-weight:700;font-size:15px;padding:8px 16px;border-radius:24px}
.datos-cli .kdos{margin-top:8px}
.datos-cli input{font-size:16px!important;font-weight:500!important}
.dc-error{color:#B42318;font-weight:700;font-size:14px;margin:10px 0 0}
.datos-cli input.falta{border-color:#B42318}
.escena.con3d>svg,.escena.con3d>.tooltip{display:none}
.t3-wrap{position:relative;border-radius:14px;overflow:hidden;background:#18213A}
#taller3d{width:100%;aspect-ratio:16/10;touch-action:pan-y;cursor:grab}
#taller3d canvas{display:block;width:100%;height:100%}
.escena:not(.con3d) .t3-wrap,.escena:not(.con3d) .t3-lista{display:none}
.t3-zoom{position:absolute;right:12px;top:12px;display:flex;gap:6px}
.t3-zoom button{min-width:40px;height:40px;border:0;border-radius:8px;background:rgba(255,255,255,.92);color:var(--marino);font:700 18px Montserrat,sans-serif;cursor:pointer;padding:0 12px}
.t3-zoom #t3-todo{font-size:13px}
.t3-info{position:absolute;left:12px;bottom:12px;max-width:min(360px,calc(100% - 24px));background:rgba(255,255,255,.96);border-radius:12px;padding:14px 16px}
.t3-info b{font-family:"Montserrat",sans-serif;color:var(--marino);font-size:18px}
.t3-info p{font-size:14px;margin:4px 0 10px;color:var(--texto)}
.t3-info .btn{padding:9px 16px;font-size:14px}
.t3-lista{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.t3-lista button{border:1.5px solid #C9D0DB;background:#fff;border-radius:999px;padding:8px 14px;font:600 14px "Open Sans",sans-serif;color:var(--marino);cursor:pointer}
.t3-lista button[aria-pressed="true"]{background:var(--marino);border-color:var(--marino);color:#fff}
.t3-fotos{margin-top:18px}
.t3-fotos img{aspect-ratio:4/3}
.sel-auto{display:grid;grid-template-columns:1fr 1.4fr;gap:10px}
.sel-auto label{display:grid;gap:5px;font:600 13px "Open Sans",sans-serif;color:var(--marino)}
.sel-auto.osc label{color:#E9EDF4}
.sel-auto select,.sel-auto input{font:600 15px "Open Sans",sans-serif;padding:10px;border-radius:8px;border:1.5px solid #C9D0DB;background:#fff;color:var(--marino);width:100%}
@media(max-width:640px){#taller3d{aspect-ratio:4/5}.sel-auto{grid-template-columns:1fr}}
.t3-fotos figcaption{color:var(--texto)}