/* ═══ TWINS4BIM — Landings sectoriales · CSS común ═══ */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --blue:#3B6FE8;--blue-dark:#2855C0;--blue-dim:rgba(59,111,232,0.1);--blue-line:rgba(59,111,232,0.3);
  --ink:#080808;--s1:#0F0F0F;--s2:#161616;--s3:#1E1E1E;
  --border:rgba(255,255,255,0.07);--muted:rgba(255,255,255,0.5);--white:#FFFFFF;
  --serif:'Cormorant Garamond',Georgia,serif;--sans:'Outfit',-apple-system,'Segoe UI',sans-serif;
}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--ink);color:var(--white);line-height:1.6;overflow-x:hidden;font-size:14px}
img,svg,video{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

/* Nav */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(8,8,8,.85);backdrop-filter:blur(16px);border-bottom:1px solid var(--border);padding:0 5vw;height:64px;display:flex;align-items:center;justify-content:space-between}
.nav-logo{font-weight:800;letter-spacing:.04em;font-size:1.05rem;color:var(--white);cursor:pointer}
.nav-logo .four{color:var(--blue)}
.nav-back{font-size:.7rem;color:var(--muted);letter-spacing:.06em;text-transform:uppercase;font-weight:600;transition:color .2s;display:inline-flex;align-items:center;gap:.4rem}
.nav-back:hover{color:var(--white)}

/* Hero */
.hero{padding:140px 5vw 80px;background:radial-gradient(ellipse at top right,rgba(59,111,232,.12),var(--ink) 60%);border-bottom:1px solid var(--border);position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(59,111,232,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(59,111,232,.04) 1px,transparent 1px);background-size:60px 60px;pointer-events:none;opacity:.5}
.hero-inner{max-width:1100px;margin:0 auto;position:relative;z-index:1}
.hero-tag{display:inline-flex;align-items:center;gap:.55rem;padding:.55rem 1rem;background:rgba(59,111,232,.12);border:1px solid var(--blue-line);font-size:.65rem;letter-spacing:.16em;text-transform:uppercase;font-weight:700;color:var(--blue);margin-bottom:1.4rem}
.hero h1{font-family:var(--serif);font-weight:300;font-size:clamp(2.2rem,5.2vw,4rem);line-height:1.05;letter-spacing:-.02em;margin-bottom:1.2rem;max-width:880px}
.hero h1 em{font-style:italic;color:var(--blue);font-weight:300}
.hero-sub{font-family:var(--serif);font-style:italic;font-size:clamp(1.05rem,1.8vw,1.4rem);color:var(--muted);max-width:680px;line-height:1.5;margin-bottom:2.2rem;font-weight:300}
.hero-ctas{display:flex;gap:1rem;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:.55rem;padding:.95rem 1.7rem;font-size:.7rem;font-weight:700;letter-spacing:.13em;text-transform:uppercase;border:none;cursor:pointer;text-decoration:none;transition:all .25s;font-family:inherit}
.btn-blue{background:var(--blue);color:#fff}
.btn-blue:hover{background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 10px 26px rgba(59,111,232,.4)}
.btn-outline{background:transparent;color:var(--white);border:1px solid var(--border)}
.btn-outline:hover{border-color:var(--blue);background:rgba(59,111,232,.08)}

/* Secciones */
.section{padding:5rem 5vw;border-bottom:1px solid var(--border)}
.section-alt{background:var(--s1)}
.section-head{text-align:center;max-width:680px;margin:0 auto 3rem}
.label{display:inline-flex;align-items:center;gap:.45rem;font-size:.62rem;letter-spacing:.18em;text-transform:uppercase;color:var(--blue);font-weight:700}
.label::before{content:'';width:18px;height:1px;background:var(--blue)}
.section-head h2{font-family:var(--serif);font-size:clamp(1.7rem,3.3vw,2.4rem);font-weight:300;line-height:1.15;margin:.8rem 0}
.section-head h2 em{font-style:italic;color:var(--blue)}
.section-head p{color:var(--muted);font-size:.9rem;line-height:1.7}

/* Beneficios grid */
.bg-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:1px;background:var(--border);max-width:1100px;margin:0 auto}
.bg-card{background:var(--ink);padding:2rem 1.6rem;transition:background .25s}
.bg-card:hover{background:var(--s1)}
.bg-num{font-family:var(--serif);font-size:2.2rem;color:var(--blue);font-weight:300;line-height:1;margin-bottom:.8rem}
.bg-title{font-family:var(--serif);font-size:1.15rem;color:var(--white);font-weight:300;margin-bottom:.5rem;line-height:1.25}
.bg-desc{font-size:.78rem;color:var(--muted);line-height:1.7}

/* Pasos */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.5rem;max-width:1100px;margin:0 auto}
.step{padding:1.8rem;background:var(--s1);border:1px solid var(--border);position:relative}
.step-num{font-family:var(--serif);font-size:3rem;color:var(--blue);opacity:.4;line-height:1;margin-bottom:.8rem;font-weight:300}
.step-title{font-size:1rem;font-weight:600;color:var(--white);margin-bottom:.5rem}
.step-desc{font-size:.78rem;color:var(--muted);line-height:1.7}

/* CTA final */
.cta{padding:5rem 5vw;text-align:center;background:linear-gradient(135deg,rgba(59,111,232,.06),transparent);border-bottom:1px solid var(--border)}
.cta h2{font-family:var(--serif);font-size:clamp(1.8rem,3.6vw,2.8rem);font-weight:300;line-height:1.15;margin-bottom:.8rem}
.cta h2 em{font-style:italic;color:var(--blue)}
.cta p{font-family:var(--serif);font-style:italic;color:var(--muted);margin-bottom:2rem;font-size:1.05rem}
.cta-btns{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}

/* Footer */
.footer{padding:2.5rem 5vw;background:var(--s1);text-align:center;font-size:.7rem;color:var(--muted);line-height:2}
.footer a{color:var(--blue)}

/* FAQ inline (mini) */
.faq-mini{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:.5rem}
.faq-mini details{background:var(--s1);border:1px solid var(--border);padding:0;transition:.2s}
.faq-mini details[open]{border-color:var(--blue-line)}
.faq-mini summary{padding:1.1rem 1.3rem;font-size:.88rem;font-weight:500;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:1rem;color:var(--white)}
.faq-mini summary::-webkit-details-marker{display:none}
.faq-mini summary::after{content:'+';color:var(--blue);font-size:1.4rem;transition:transform .2s;line-height:1}
.faq-mini details[open] summary::after{transform:rotate(45deg)}
.faq-mini .ans{padding:0 1.3rem 1.3rem;color:var(--muted);font-size:.82rem;line-height:1.75}

/* Responsive */
@media(max-width:720px){
  .hero{padding:100px 5vw 50px}
  .section,.cta{padding:3.5rem 5vw}
  .section-head{margin-bottom:2rem}
  .nav{padding:0 4vw;height:56px}
  .nav-logo{font-size:.9rem}
  .nav-back{font-size:.6rem}
  .bg-card{padding:1.5rem 1.2rem}
}