/* ============================================================
   XDM 3D — Sitio web corporativo (es)
   Dominio: https://3d.wa-ya.cn
   ============================================================ */
:root{
  --azul-osc:#0b1220;
  --azul:#101c33;
  --azul-med:#16233f;
  --acento:#2ea8ff;
  --acento-2:#ffb02e;
  --texto:#e8eef7;
  --texto-suave:#a9b6c9;
  --borde:rgba(255,255,255,.10);
  --radio:14px;
  --sombra:0 10px 30px rgba(0,0,0,.35);
  --max:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Segoe UI","Helvetica Neue",Arial,"Noto Sans",sans-serif;
  background:var(--azul-osc);color:var(--texto);line-height:1.65;
  font-size:16px;
}
img{max-width:100%;display:block}
a{color:var(--acento);text-decoration:none;transition:color .2s}
a:hover{color:#7ecbff}
h1,h2,h3,h4{line-height:1.25;font-weight:700;letter-spacing:.2px}
h1{font-size:2.4rem}
h2{font-size:1.9rem}
h3{font-size:1.25rem}
.contenedor{max-width:var(--max);margin:0 auto;padding:0 22px}
.seccion{padding:72px 0}
.seccion.alt{background:var(--azul)}
.titulo-seccion{text-align:center;margin-bottom:14px}
.subtitulo-seccion{text-align:center;color:var(--texto-suave);max-width:820px;margin:0 auto 44px}
.luz{
  width:64px;height:4px;border-radius:4px;margin:14px auto 0;
  background:linear-gradient(90deg,var(--acento),var(--acento-2));
}
.etiqueta{
  display:inline-block;background:rgba(46,168,255,.12);color:var(--acento);
  border:1px solid rgba(46,168,255,.35);border-radius:999px;
  padding:4px 14px;font-size:.82rem;font-weight:600;margin-bottom:14px;
}

/* ---------- Cabecera ---------- */
.cabecera{
  position:sticky;top:0;z-index:100;
  background:rgba(11,18,32,.92);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--borde);
}
.barra{display:flex;align-items:center;justify-content:space-between;height:74px}
.logo-enlace{display:flex;align-items:center;gap:14px}
.logo-enlace img{height:52px;width:auto;border-radius:6px}
.logo-texto{display:flex;flex-direction:column;line-height:1.15}
.logo-texto strong{font-size:1.02rem;color:#fff}
.logo-texto span{font-size:.72rem;color:var(--texto-suave);letter-spacing:.6px}
.navegacion ul{display:flex;gap:6px;list-style:none}
.navegacion a{
  display:block;padding:10px 14px;border-radius:8px;
  color:var(--texto);font-weight:500;font-size:.95rem;
}
.navegacion a:hover{background:rgba(255,255,255,.06);color:#fff}
.navegacion a.activo{color:var(--acento)}
.nav-toggle{
  display:none;background:none;border:1px solid var(--borde);border-radius:8px;
  color:#fff;font-size:1.3rem;padding:6px 12px;cursor:pointer;
}
.cta-cabecera{
  background:linear-gradient(90deg,var(--acento),#1f7fe0);color:#fff !important;
  font-weight:700;border-radius:999px;padding:10px 22px !important;
}
.cta-cabecera:hover{filter:brightness(1.12)}

/* ---------- Héroe ---------- */
.heroe{
  position:relative;min-height:420px;display:flex;align-items:center;
  background:linear-gradient(120deg,rgba(11,18,32,.88),rgba(11,18,32,.55)),
             url('/img/banner.jpg') center/cover no-repeat;
}
.heroe-interior{padding:90px 0}
.heroe h1{max-width:760px;margin-bottom:18px}
.heroe p{max-width:640px;color:var(--texto-suave);font-size:1.12rem;margin-bottom:30px}
.heroe-acciones{display:flex;gap:16px;flex-wrap:wrap}
.sello-hero{
  margin-top:34px;display:flex;gap:34px;flex-wrap:wrap;color:var(--texto-suave);
  font-size:.9rem;
}
.sello-hero b{color:#fff;font-size:1.3rem;display:block}

/* ---------- Botones ---------- */
.btn{
  display:inline-block;padding:13px 30px;border-radius:999px;font-weight:700;
  cursor:pointer;border:none;font-size:.98rem;transition:transform .15s,filter .15s;
}
.btn:hover{transform:translateY(-2px)}
.btn-primario{background:linear-gradient(90deg,var(--acento),#1f7fe0);color:#fff}
.btn-secundario{background:transparent;color:#fff;border:2px solid var(--borde)}
.btn-secundario:hover{border-color:var(--acento);color:#fff}

/* ---------- Tarjetas ---------- */
.rejilla{display:grid;gap:26px}
.rejilla-2{grid-template-columns:repeat(2,1fr)}
.rejilla-3{grid-template-columns:repeat(3,1fr)}
.rejilla-4{grid-template-columns:repeat(4,1fr)}
.tarjeta{
  background:var(--azul-med);border:1px solid var(--borde);border-radius:var(--radio);
  padding:28px;box-shadow:var(--sombra);transition:transform .2s,border-color .2s;
}
.tarjeta:hover{transform:translateY(-4px);border-color:rgba(46,168,255,.45)}
.tarjeta img{border-radius:10px;margin-bottom:18px;object-fit:cover}
.tarjeta h3{margin-bottom:10px;color:#fff}
.tarjeta p{color:var(--texto-suave);font-size:.95rem}
.tarjeta .enlace{display:inline-block;margin-top:14px;font-weight:600}
.icono-ventaja{
  width:54px;height:54px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  font-size:1.5rem;background:rgba(46,168,255,.12);margin-bottom:16px;
}

/* ---------- Producto ---------- */
.tarjeta-producto img{height:230px;width:100%;background:#0d1526}
.lista-puntos{list-style:none;margin-top:14px}
.lista-puntos li{
  padding:7px 0 7px 26px;position:relative;color:var(--texto-suave);font-size:.94rem;
}
.lista-puntos li::before{
  content:"✓";position:absolute;left:0;color:var(--acento);font-weight:700;
}
.tabla-especificaciones{width:100%;border-collapse:collapse;margin-top:20px}
.tabla-especificaciones td{
  padding:12px 16px;border-bottom:1px solid var(--borde);font-size:.95rem;
}
.tabla-especificaciones td:first-child{
  color:var(--texto-suave);width:38%;font-weight:600;
}
.tabla-especificaciones td:last-child{color:#fff}
.detalle-producto{display:grid;grid-template-columns:1.05fr 1fr;gap:44px;align-items:start}
.detalle-producto .marco-img{
  background:#0d1526;border:1px solid var(--borde);border-radius:var(--radio);
  padding:26px;position:sticky;top:100px;
}
.navegacion-productos{
  display:flex;justify-content:space-between;margin-top:60px;gap:16px;flex-wrap:wrap;
}

/* ---------- Servicios / galería ---------- */
.tarjeta-servicio{padding:18px}
.tarjeta-servicio img{height:200px;width:100%;background:#0d1526}
.tarjeta-servicio h3{font-size:1.02rem}
.tarjeta-servicio p{font-size:.86rem;margin-top:6px}
.filtro-servicios{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:36px}
.filtro-servicios button{
  background:var(--azul-med);border:1px solid var(--borde);color:var(--texto-suave);
  padding:8px 18px;border-radius:999px;cursor:pointer;font-size:.88rem;
}
.filtro-servicios button.activo,.filtro-servicios button:hover{
  border-color:var(--acento);color:#fff;
}

/* ---------- Cinta de cifras ---------- */
.cifras{background:linear-gradient(90deg,#12233f,#0d1830);border-block:1px solid var(--borde)}
.cifras .rejilla-4{padding:44px 0}
.cifra{text-align:center}
.cifra b{font-size:2.1rem;color:var(--acento);display:block}
.cifra span{color:var(--texto-suave);font-size:.9rem}

/* ---------- FAQ ---------- */
.faq-item{
  background:var(--azul-med);border:1px solid var(--borde);border-radius:var(--radio);
  margin-bottom:16px;overflow:hidden;
}
.faq-item summary{
  padding:20px 24px;cursor:pointer;font-weight:600;color:#fff;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:14px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:1.4rem;color:var(--acento)}
.faq-item[open] summary::after{content:"–"}
.faq-item .respuesta{padding:0 24px 20px;color:var(--texto-suave)}

/* ---------- Formulario ---------- */
.formulario{
  background:var(--azul-med);border:1px solid var(--borde);border-radius:var(--radio);
  padding:34px;box-shadow:var(--sombra);max-width:760px;margin:0 auto;
}
.campo{margin-bottom:20px}
.campo label{display:block;font-weight:600;margin-bottom:8px;font-size:.92rem}
.campo input,.campo select,.campo textarea{
  width:100%;padding:13px 16px;border-radius:10px;border:1px solid var(--borde);
  background:#0d1526;color:#fff;font-size:.95rem;font-family:inherit;
}
.campo input:focus,.campo select:focus,.campo textarea:focus{
  outline:none;border-color:var(--acento);
}
.campo-fila{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.mensaje-estado{
  display:none;margin-top:18px;padding:16px 20px;border-radius:10px;font-weight:600;
}
.mensaje-estado.ok{display:block;background:rgba(46,204,113,.12);border:1px solid rgba(46,204,113,.5);color:#7fe3a8}
.mensaje-estado.error{display:block;background:rgba(231,76,60,.12);border:1px solid rgba(231,76,60,.5);color:#ff9d8f}
.nota-formulario{font-size:.82rem;color:var(--texto-suave);margin-top:12px}

/* ---------- Certificados ---------- */
.tarjeta-cert{padding:16px;text-align:center}
.tarjeta-cert img{height:280px;object-fit:contain;background:#0d1526;border-radius:8px;padding:8px}
.tarjeta-cert h3{font-size:.92rem;margin-top:14px}

/* ---------- Pie ---------- */
.pie{background:#080e1a;border-top:1px solid var(--borde);padding:56px 0 30px;margin-top:0}
.pie-rejilla{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:36px;margin-bottom:36px}
.pie h4{color:#fff;margin-bottom:14px;font-size:1rem}
.pie ul{list-style:none}
.pie li{margin-bottom:9px;font-size:.9rem;color:var(--texto-suave)}
.pie-pie{
  border-top:1px solid var(--borde);padding-top:22px;display:flex;
  justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:.82rem;color:var(--texto-suave);
}

/* ---------- Migas ---------- */
.migas{padding:18px 0;font-size:.85rem;color:var(--texto-suave)}
.migas a{color:var(--texto-suave)}

/* ---------- Página cabecera interior ---------- */
.cabecera-pagina{
  background:linear-gradient(120deg,rgba(11,18,32,.9),rgba(11,18,32,.6)),
             url('/img/banner.jpg') center/cover no-repeat;
  padding:64px 0;text-align:center;
}
.cabecera-pagina h1{margin-bottom:10px}
.cabecera-pagina p{color:var(--texto-suave);max-width:720px;margin:0 auto}

/* ---------- Responsivo ---------- */
@media (max-width:1024px){
  .rejilla-4{grid-template-columns:repeat(2,1fr)}
  .rejilla-3{grid-template-columns:repeat(2,1fr)}
  .pie-rejilla{grid-template-columns:1fr 1fr}
  .detalle-producto{grid-template-columns:1fr}
  .detalle-producto .marco-img{position:static}
}
@media (max-width:760px){
  h1{font-size:1.7rem}
  h2{font-size:1.5rem}
  .nav-toggle{display:block}
  .navegacion{
    display:none;position:absolute;top:74px;left:0;right:0;
    background:var(--azul-osc);border-bottom:1px solid var(--borde);
    padding:14px 22px 22px;
  }
  .navegacion.abierta{display:block}
  .navegacion ul{flex-direction:column}
  .cta-cabecera{display:inline-block;margin-top:8px}
  .rejilla-2,.rejilla-3,.rejilla-4{grid-template-columns:1fr}
  .campo-fila{grid-template-columns:1fr}
  .seccion{padding:52px 0}
  .heroe-interior{padding:60px 0}
  .sello-hero{gap:20px}
}