:root{
  --ink:#0B1B2E; --ink-2:#13283F; --line:#24405F;
  --cyan:#5CC8FF; --cyan-d:#1F8FD1;
  --paper:#F4F2EC; --paper-2:#EAE6DC; --rule:#CFC8B8;
  --text:#1A2633; --muted:#5A6573; --on-ink:#E7EEF6; --on-ink-muted:#9FB2C6;
  --amber:#E8A33D;
  --mono:"IBM Plex Mono", ui-monospace, Consolas, monospace;
  --sans:"IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  --wrap:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);color:var(--text);background:var(--paper);line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono);letter-spacing:.04em}

/* ---------- header ---------- */
header.top{position:sticky;top:0;z-index:20;background:rgba(11,27,46,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:#fff}
.brand svg{width:30px;height:30px}
.brand b{font-weight:700;letter-spacing:.18em;font-size:15px}
nav.links{display:flex;gap:28px}
nav.links a{color:var(--on-ink-muted);text-decoration:none;font-size:14px;font-weight:500}
nav.links a:hover{color:#fff}
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 18px;border-radius:4px;font-weight:600;font-size:14px;text-decoration:none;border:1px solid transparent;transition:background .15s,border-color .15s,color .15s}
.btn.primary{background:var(--cyan);color:var(--ink)}
.btn.primary:hover{background:#86D7FF}
.btn.ghost{border-color:var(--line);color:var(--on-ink)}
.btn.ghost:hover{border-color:var(--cyan);color:#fff}
.top .btn{padding:8px 14px}

/* ---------- hero ---------- */
.hero{position:relative;background:var(--ink);color:var(--on-ink);overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px),
  linear-gradient(rgba(36,64,95,.45) 1px,transparent 1px),linear-gradient(90deg,rgba(36,64,95,.45) 1px,transparent 1px);
  background-size:120px 120px,120px 120px,24px 24px,24px 24px;opacity:.55;
  mask-image:radial-gradient(ellipse at 70% 40%,#000 0%,transparent 75%);-webkit-mask-image:radial-gradient(ellipse at 70% 40%,#000 0%,transparent 75%)}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;padding-top:96px;padding-bottom:104px}
.tag{display:inline-block;font-family:var(--mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan);border:1px solid var(--line);padding:5px 10px;border-radius:3px}
.hero h1{font-size:clamp(36px,5.2vw,60px);line-height:1.06;margin:22px 0 20px;font-weight:700;letter-spacing:-.02em;color:#fff}
.hero h1 em{font-style:normal;color:var(--cyan)}
.hero p.lead{font-size:18px;color:var(--on-ink-muted);max-width:560px;margin:0 0 32px}
.cta{display:flex;gap:12px;flex-wrap:wrap}

/* title block */
.titleblock{border:1.5px solid var(--cyan);font-family:var(--mono);font-size:12px;color:var(--on-ink);background:rgba(11,27,46,.7)}
.titleblock .row{display:grid;grid-template-columns:110px 1fr;border-top:1px solid var(--line)}
.titleblock .row:first-child{border-top:0}
.titleblock .k{padding:10px 12px;color:var(--on-ink-muted);border-right:1px solid var(--line);text-transform:uppercase;letter-spacing:.1em;font-size:11px}
.titleblock .v{padding:10px 12px}
.titleblock .head{padding:16px 12px;font-family:var(--sans);font-size:20px;font-weight:700;letter-spacing:.16em;color:#fff;border-bottom:1.5px solid var(--cyan);display:flex;justify-content:space-between;align-items:center}
.titleblock .head span{font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--cyan);font-weight:500}
.ok{color:#7BE0A4}.wip{color:var(--amber)}

/* ---------- sections ---------- */
section{padding:96px 0}
.sheet{display:flex;align-items:baseline;gap:16px;margin-bottom:14px}
.sheet .no{font-family:var(--mono);font-size:12px;color:var(--cyan-d);letter-spacing:.14em;text-transform:uppercase}
.sheet .rule{flex:1;height:1px;background:var(--rule)}
h2{font-size:clamp(28px,3.4vw,40px);line-height:1.15;margin:0 0 16px;letter-spacing:-.015em}
.intro{max-width:680px;color:var(--muted);font-size:17px;margin:0 0 48px}

/* principles */
.principles{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--rule);background:#fff}
.principle{padding:32px 28px;border-left:1px solid var(--rule)}
.principle:first-child{border-left:0}
.principle .n{font-family:var(--mono);font-size:12px;color:var(--cyan-d);letter-spacing:.12em}
.principle h3{margin:10px 0 8px;font-size:19px}
.principle p{margin:0;color:var(--muted);font-size:15px}

/* products */
.products{background:var(--paper-2);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.product{display:grid;grid-template-columns:1fr 1fr;gap:0;background:#fff;border:1px solid var(--rule);margin-bottom:28px}
.product:last-child{margin-bottom:0}
.product .body{padding:40px 40px 36px}
.product .meta{display:flex;gap:10px;align-items:center;margin-bottom:14px;flex-wrap:wrap}
.chip{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;padding:4px 9px;border-radius:3px;border:1px solid var(--rule);color:var(--muted)}
.chip.status{border-color:transparent;background:#FFF3DF;color:#9A5F0A}
.chip.status.live{background:#E3F6EA;color:#1E7A45}
.product h3{font-size:28px;margin:0 0 6px;letter-spacing:-.01em}
.product .strap{font-weight:600;color:var(--cyan-d);margin:0 0 14px}
.product p{color:var(--muted);margin:0 0 16px}
.product ul{margin:0;padding:0;list-style:none}
.product li{padding:9px 0 9px 26px;border-top:1px dashed var(--rule);position:relative;font-size:15px}
.product li::before{content:"";position:absolute;left:2px;top:17px;width:12px;height:2px;background:var(--cyan-d)}
.product .visual{background:var(--ink);position:relative;min-height:300px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.product .visual img{width:100%;height:100%;object-fit:cover;object-position:78% 50%;position:absolute;inset:0}
.product.flip .visual{order:-1}
.diagram{width:86%;max-width:420px}

/* services */
.services{display:grid;grid-template-columns:repeat(2,1fr);gap:0;border:1px solid var(--rule);background:#fff}
.service{padding:28px 30px;border-top:1px solid var(--rule);border-left:1px solid var(--rule);display:grid;grid-template-columns:44px 1fr;gap:14px}
.service:nth-child(-n+2){border-top:0}
.service:nth-child(odd){border-left:0}
.service .ic{width:40px;height:40px;border:1.5px solid var(--ink);display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:12px;font-weight:500}
.service h3{margin:2px 0 6px;font-size:17px}
.service p{margin:0;color:var(--muted);font-size:15px}

/* about */
.about{background:var(--ink);color:var(--on-ink)}
.about .sheet .rule{background:var(--line)}
.about .sheet .no{color:var(--cyan)}
.about h2{color:#fff}
.about-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:56px;align-items:start}
.about p{color:var(--on-ink-muted);font-size:17px;margin:0 0 18px}
.about p strong{color:#fff;font-weight:600}
.timeline{border-left:1.5px solid var(--cyan);padding-left:22px;font-size:15px}
.timeline > div{position:relative;padding:0 0 22px}
.timeline > div::before{content:"";position:absolute;left:-28px;top:7px;width:10px;height:10px;border:1.5px solid var(--cyan);background:var(--ink);border-radius:50%}
.timeline .y{font-family:var(--mono);font-size:12px;color:var(--cyan);letter-spacing:.1em}
.timeline .t{color:var(--on-ink)}

/* contact */
.contact-box{display:grid;grid-template-columns:1.1fr .9fr;border:1.5px solid var(--ink);background:#fff}
.contact-box .l{padding:44px}
.contact-box .r{padding:44px;background:var(--paper-2);border-left:1.5px solid var(--ink);display:flex;flex-direction:column;gap:18px;justify-content:center}
.contact-box .k{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.contact-box .v{font-size:18px;font-weight:600;text-decoration:none;word-break:break-word}
.contact-box .v:hover{color:var(--cyan-d)}
.btn.dark{background:var(--ink);color:#fff}
.btn.dark:hover{background:var(--ink-2)}

footer{background:var(--ink);color:var(--on-ink-muted);font-size:13px;border-top:1px solid var(--line)}
footer .wrap{display:flex;justify-content:space-between;align-items:center;padding-top:26px;padding-bottom:26px;gap:16px;flex-wrap:wrap}
footer a{color:var(--on-ink-muted)}

/* ---------- responsive ---------- */
@media (max-width:900px){
  nav.links{display:none}
  .hero .wrap{grid-template-columns:1fr;padding-top:64px;padding-bottom:72px;gap:40px}
  .principles{grid-template-columns:1fr}
  .principle{border-left:0;border-top:1px solid var(--rule)}
  .principle:first-child{border-top:0}
  .product{grid-template-columns:1fr}
  .product.flip .visual{order:0}
  .product .visual{min-height:220px}
  .services{grid-template-columns:1fr}
  .service{border-left:0!important;border-top:1px solid var(--rule)!important}
  .service:first-child{border-top:0!important}
  .about-grid{grid-template-columns:1fr;gap:36px}
  .contact-box{grid-template-columns:1fr}
  .contact-box .r{border-left:0;border-top:1.5px solid var(--ink)}
  section{padding:68px 0}
}
@media (max-width:520px){
  .wrap{padding:0 16px}
  .product .body,.contact-box .l,.contact-box .r{padding:28px 22px}
  .top .btn{display:none}
  .titleblock .row{grid-template-columns:92px 1fr}
}

/* ---------- additions: branches, R&D, VCAD page ---------- */
.features{display:grid;grid-template-columns:repeat(2,1fr);gap:0;border:1px solid var(--rule);background:#fff}
.feature{padding:28px 30px;border-top:1px solid var(--rule);border-left:1px solid var(--rule)}
.feature:nth-child(-n+2){border-top:0}
.feature:nth-child(odd){border-left:0}
.feature .n{font-family:var(--mono);font-size:12px;color:var(--cyan-d);letter-spacing:.12em}
.feature h3{margin:8px 0 6px;font-size:18px}
.feature p{margin:0;color:var(--muted);font-size:15px}
.branch{display:grid;grid-template-columns:1fr 1fr;background:var(--ink);color:var(--on-ink);border:1px solid var(--line);text-decoration:none;transition:border-color .15s}
.branch:hover{border-color:var(--cyan)}
.branch .img{position:relative;min-height:300px;overflow:hidden}
.branch .img img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:78% 50%}
.branch .body{padding:40px}
.branch h3{color:#fff;font-size:30px;margin:10px 0 6px}
.branch .strap{color:var(--cyan);font-weight:600;margin:0 0 14px}
.branch p{color:var(--on-ink-muted);margin:0 0 22px}
.branch .chip{border-color:var(--line);color:var(--on-ink-muted)}
.branch .go{font-weight:600;color:var(--cyan)}
.more{margin-top:20px;border:1px dashed var(--rule);padding:18px 22px;font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--muted);text-transform:uppercase}
.rnd{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--rule);background:#fff}
.rnd .item{padding:28px;border-left:1px solid var(--rule);border-top:1px solid var(--rule)}
.rnd .item:nth-child(3n+1){border-left:0}
.rnd .item:nth-child(-n+3){border-top:0}
.rnd .ic{width:40px;height:40px;border:1.5px solid var(--ink);display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:12px;font-weight:500;margin-bottom:14px}
.rnd h3{margin:0 0 6px;font-size:17px}
.rnd p{margin:0;color:var(--muted);font-size:15px}
.callout{margin-top:28px;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;background:var(--ink);color:var(--on-ink);padding:26px 30px}
.callout p{margin:0;color:var(--on-ink-muted)}
.callout strong{color:#fff}
.crumb{font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--on-ink-muted);text-decoration:none}
.crumb:hover{color:var(--cyan)}
.vhero .art{border:1.5px solid var(--cyan);background:#000}
.vhero .art img{width:100%}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--rule);background:#fff;counter-reset:s}
.step{padding:28px 24px;border-left:1px solid var(--rule)}
.step:first-child{border-left:0}
.step .n{font-family:var(--mono);font-size:28px;color:var(--cyan-d);line-height:1}
.step h3{margin:12px 0 6px;font-size:17px}
.step p{margin:0;color:var(--muted);font-size:15px}
.cmd{font-family:var(--mono);font-size:14px;background:var(--ink);color:#BFE9FF;padding:18px 22px;border-left:3px solid var(--cyan);margin:0 0 28px;overflow-x:auto;white-space:pre}
.roadmap{border-left:1.5px solid var(--cyan-d);padding-left:24px}
.roadmap > div{position:relative;padding:0 0 24px}
.roadmap > div::before{content:"";position:absolute;left:-30px;top:6px;width:11px;height:11px;border:1.5px solid var(--cyan-d);background:var(--paper);border-radius:50%}
.roadmap > div.done::before{background:var(--cyan-d)}
.roadmap .y{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--cyan-d);text-transform:uppercase}
.roadmap h3{margin:2px 0 4px;font-size:17px}
.roadmap p{margin:0;color:var(--muted);font-size:15px}
@media (max-width:900px){
  .features{grid-template-columns:1fr}
  .feature{border-left:0!important;border-top:1px solid var(--rule)!important}
  .feature:first-child{border-top:0!important}
  .branch{grid-template-columns:1fr}
  .branch .img{min-height:220px}
  .rnd{grid-template-columns:1fr}
  .rnd .item{border-left:0!important;border-top:1px solid var(--rule)!important}
  .rnd .item:first-child{border-top:0!important}
  .steps{grid-template-columns:1fr 1fr}
  .step:nth-child(3){border-left:0}
  .step:nth-child(n+3){border-top:1px solid var(--rule)}
}
@media (max-width:520px){
  .branch .body{padding:28px 22px}
  .steps{grid-template-columns:1fr}
  .step{border-left:0!important;border-top:1px solid var(--rule)}
  .step:first-child{border-top:0}
}

.founder{display:grid;grid-template-columns:1.3fr .7fr;gap:56px;align-items:center}
.founder .card{border:1.5px solid var(--cyan);padding:28px;background:rgba(11,27,46,.6)}
.founder .card .k{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan)}
.founder .card .name{font-size:24px;font-weight:700;color:#fff;margin:6px 0 2px}
.founder .card .role{color:var(--on-ink-muted);margin-bottom:20px}
@media (max-width:900px){.founder{grid-template-columns:1fr;gap:28px}}