:root{
  --bg:#f4f6f8;
  --surface:#fff;
  --ink:#0c1219;
  --muted:#617181;
  --line:#dce2e7;
  --blue:#2874df;
  --dark:#0d1218;
  --max:1240px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit}
.container{width:min(var(--max),calc(100% - 44px));margin:0 auto}

header{
  position:sticky;top:0;z-index:80;
  background:rgba(12,17,23,.95);
  border-bottom:1px solid rgba(255,255,255,.08);
  backdrop-filter:blur(14px);
}
.nav{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:26px}
.brand-logo{width:250px;height:auto}
nav{display:flex;align-items:center;gap:19px}
nav a{color:#e9edf2;text-decoration:none;font-size:.72rem;font-weight:760}
nav a:hover{color:#fff}

.hero{position:relative;min-height:610px;display:flex;align-items:flex-end;overflow:hidden;background:#080c11}
.hero-media{position:absolute;inset:0}
.hero-media img{width:100%;height:100%;object-fit:cover;object-position:center 55%}
.hero::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(90deg,rgba(5,9,13,.94) 0%,rgba(5,9,13,.72) 36%,rgba(5,9,13,.20) 72%,rgba(5,9,13,.04) 100%),
    linear-gradient(0deg,rgba(5,9,13,.72),transparent 52%);
}
.hero-inner{position:relative;z-index:2;padding:125px 0 70px}
.breadcrumb{display:flex;gap:8px;color:#b3bdc7;font-size:.7rem;margin-bottom:22px}
.breadcrumb a{text-decoration:none}
.hero-copy{max-width:720px}
.eyebrow{
  display:flex;align-items:center;gap:9px;
  color:var(--blue);font-size:.67rem;font-weight:850;
  letter-spacing:.14em;text-transform:uppercase
}
.eyebrow::before{content:"";width:18px;height:1px;background:currentColor}
.hero .eyebrow{color:#8ebcff}
.hero h1{color:#fff;font-size:clamp(2.5rem,4.8vw,4.65rem);line-height:.96;letter-spacing:-.055em;margin:17px 0 20px}
.hero p{color:#d3dce4;font-size:1rem;max-width:690px;margin:0}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:27px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border-radius:999px;text-decoration:none;font-size:.75rem;font-weight:850}
.btn-primary{background:#5d6670;color:#fff}
.btn-outline{border:1px solid rgba(255,255,255,.42);color:#fff;background:rgba(255,255,255,.06)}

.fact-strip{
  position:relative;z-index:3;margin-top:-29px;
  display:grid;grid-template-columns:repeat(4,1fr);
  background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;
  box-shadow:0 18px 48px rgba(22,32,44,.09)
}
.fact{padding:18px 19px;border-right:1px solid var(--line)}
.fact:last-child{border-right:0}
.fact b{display:block;font-size:.9rem;margin-bottom:3px}
.fact span{display:block;color:var(--muted);font-size:.69rem;line-height:1.4}

.section{padding:78px 0}
.section.dark{background:var(--dark);color:#fff}
.section.dark .lead,.section.dark p{color:#b8c3cc}
.section-head{display:grid;grid-template-columns:.6fr 1.4fr;gap:52px;align-items:start;margin-bottom:30px}
.section-head h2{font-size:clamp(1.9rem,3.15vw,3.45rem);line-height:1.03;letter-spacing:-.048em;margin:0 0 13px}
.lead{font-size:.92rem;color:var(--muted);margin:0;max-width:800px}

.system-flow{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.system-step{
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;min-height:225px
}
.system-icon,.use-icon{
  width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  background:#edf5ff;color:#2874df;border:1px solid #d7e6fb
}
.system-icon svg,.use-icon svg{width:25px;height:25px}
.system-step span{display:block;font-size:.57rem;letter-spacing:.15em;color:#7d91a7;font-weight:850;margin-top:22px}
.system-step h3{font-size:1rem;margin:7px 0}
.system-step p{font-size:.74rem;color:var(--muted);margin:0}
.system-note,.platform-note,.ecosystem-line{
  margin-top:14px;padding:13px 16px;border:1px solid var(--line);border-radius:14px;background:#fff;
  display:flex;gap:8px;align-items:flex-start;font-size:.72rem
}
.system-note span,.platform-note span,.ecosystem-line span{color:var(--muted)}

.use-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.use-card{border:1px solid #2b3540;border-radius:18px;background:#141b23;padding:20px;min-height:215px}
.use-card .use-icon{background:#172431;border-color:#334555;color:#8dbbff}
.use-card h3{font-size:1rem;margin:18px 0 8px}
.use-card p{font-size:.73rem;line-height:1.55;margin:0}

.aircraft-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.aircraft-card{background:#fff;border:1px solid var(--line);border-radius:22px;overflow:hidden}
.aircraft-media{height:260px;background:#0c1117}
.aircraft-media img{width:100%;height:100%;object-fit:cover}
.aircraft-body{padding:22px}
.compare-kicker{font-size:.6rem;text-transform:uppercase;letter-spacing:.14em;color:#7f90a3;font-weight:850}
.aircraft-body h3{font-size:1.35rem;margin:7px 0}
.aircraft-body p{font-size:.78rem;color:var(--muted);margin:0 0 16px}
.spec-row{display:flex;justify-content:space-between;gap:12px;padding:9px 0;border-top:1px solid var(--line);font-size:.68rem}
.spec-row span{color:var(--muted)}

.fh2-section{background:#eef1f4}
.fh2-main{display:grid;grid-template-columns:1.05fr .95fr;background:#0b1016;border-radius:25px;overflow:hidden}
.fh2-media{min-height:450px}
.fh2-media img{width:100%;height:100%;object-fit:cover}
.fh2-content{padding:38px;color:#fff}
.fh2-content h2{font-size:clamp(2rem,3vw,3.1rem);line-height:1.03;letter-spacing:-.048em;margin:14px 0}
.fh2-content p{color:#bec8d1;font-size:.83rem}
.fh2-features{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:22px}
.fh2-features div{border-top:1px solid #2b3540;padding-top:10px}
.fh2-features b{display:block;font-size:.76rem}
.fh2-features span{display:block;color:#aeb9c3;font-size:.65rem;margin-top:2px}

.ai-panel{margin-top:16px;padding:28px;border-radius:22px;background:#111820;color:#fff;border:1px solid #2c3742}
.ai-panel-head{max-width:840px}
.ai-panel-head h2{font-size:clamp(1.75rem,2.8vw,2.8rem);line-height:1.04;letter-spacing:-.045em;margin:13px 0 10px}
.ai-panel-head p{font-size:.81rem;color:#b8c3cc;margin:0}
.ai-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:20px}
.ai-card{background:#0d131a;border:1px solid #2a3540;border-radius:15px;padding:17px;min-height:165px}
.ai-card span{font-size:.56rem;color:#84b6ff;font-weight:850;letter-spacing:.13em}
.ai-card h3{font-size:.94rem;margin:9px 0 6px}
.ai-card p{font-size:.68rem;color:#aebac4;margin:0;line-height:1.52}
.ecosystem-line{border-color:#2d3945;background:#0d131a;color:#fff}
.ecosystem-line span{color:#aebac4}

.deployment-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.deployment-card{background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden}
.deployment-card img{width:100%;height:270px;object-fit:cover}
.deployment-card>div{padding:20px}
.deployment-card span{font-size:.58rem;letter-spacing:.14em;color:#2874df;font-weight:850}
.deployment-card h3{font-size:1.15rem;margin:8px 0}
.deployment-card p{font-size:.75rem;color:var(--muted);margin:0}

.products{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.product-card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;display:grid;grid-template-columns:190px 1fr;min-height:265px}
.product-media{background:#0d1218;overflow:hidden}
.product-media img{width:100%;height:100%;object-fit:cover}
.product-body{padding:19px;display:flex;flex-direction:column}
.product-kicker{font-size:.58rem;letter-spacing:.14em;text-transform:uppercase;color:#7d8fa3;font-weight:850}
.product-body h3{font-size:1.13rem;margin:7px 0}
.product-body p{font-size:.7rem;color:var(--muted);margin:0 0 10px}
.product-specs{display:grid;gap:5px;margin-top:auto}
.product-specs span{font-size:.63rem;border-top:1px solid var(--line);padding-top:6px;color:#607080}
.product-specs b{color:#111a23}
.price{font-size:1.15rem;font-weight:900;margin:12px 0 8px}
.product-link{display:inline-flex;align-items:center;justify-content:center;width:100%;min-height:39px;border-radius:999px;background:#5d6670;color:#fff;text-decoration:none;font-size:.68rem;font-weight:850}
.accessory-line{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-top:15px;font-size:.68rem;color:var(--muted)}
.accessory-line a{padding:7px 10px;border:1px solid var(--line);border-radius:999px;background:#fff;text-decoration:none;color:#1e67c5;font-weight:750}

.faq-list{display:grid;gap:8px}
details{border:1px solid var(--line);border-radius:14px;background:#fff;padding:0 17px}
summary{cursor:pointer;padding:14px 0;font-weight:800;font-size:.8rem}
details p{margin:0 0 15px;color:var(--muted);font-size:.75rem}

footer{background:#0c1117;color:#aeb9c4;padding:34px 0}
.footer{display:flex;justify-content:space-between;gap:26px;align-items:flex-start}
.footer-logo{width:230px;height:auto;margin-bottom:12px}
.footer>div:first-child{font-size:.68rem;max-width:560px}
.footer-links{display:flex;flex-wrap:wrap;gap:14px}
.footer-links a{color:#d7dee5;text-decoration:none;font-size:.7rem}
.back-to-top{
  position:fixed;right:18px;bottom:18px;z-index:90;width:44px;height:44px;
  border:1px solid #ccd3d9;border-radius:50%;background:#fff;color:#27323d;
  box-shadow:0 10px 28px rgba(20,28,36,.13);opacity:0;visibility:hidden;transform:translateY(8px);transition:.2s;cursor:pointer
}
.back-to-top.visible{opacity:1;visibility:visible;transform:none}

@media(max-width:980px){
  nav{display:none}
  .section-head{grid-template-columns:1fr;gap:16px}
  .system-flow,.use-grid{grid-template-columns:repeat(2,1fr)}
  .fh2-main{grid-template-columns:1fr}
  .fh2-media{min-height:330px}
  .ai-grid{grid-template-columns:repeat(2,1fr)}
  .products{grid-template-columns:1fr}
}
@media(max-width:680px){
  .container{width:min(100% - 28px,var(--max))}
  .brand-logo{width:205px}
  .hero{min-height:590px}
  .hero-inner{padding:108px 0 46px}
  .hero h1{font-size:2.35rem}
  .fact-strip{grid-template-columns:1fr 1fr;margin-top:-20px}
  .fact{border-bottom:1px solid var(--line)}
  .fact:nth-child(2){border-right:0}
  .section{padding:56px 0}
  .system-flow,.use-grid{grid-template-columns:1fr 1fr;gap:8px}
  .system-step,.use-card{padding:14px;min-height:190px}
  .system-step h3,.use-card h3{font-size:.86rem}
  .system-step p,.use-card p{font-size:.64rem}
  .aircraft-grid,.deployment-grid{grid-template-columns:1fr}
  .aircraft-media,.deployment-card img{height:215px}
  .fh2-content{padding:25px 18px}
  .fh2-features{grid-template-columns:1fr 1fr}
  .ai-panel{padding:20px 14px}
  .ai-grid{grid-template-columns:1fr}
  .ai-card{min-height:auto}
  .product-card{grid-template-columns:115px 1fr;min-height:235px}
  .product-body{padding:13px 11px}
  .product-body h3{font-size:.93rem}
  .product-body p{font-size:.62rem}
  .product-specs span{font-size:.56rem}
  .price{font-size:.95rem}
  .footer{flex-direction:column}
}