:root {
  color-scheme: dark;
  --bg: #071019;
  --bg-deep: #04090f;
  --panel: #0d1823;
  --panel-soft: rgba(17, 31, 43, .72);
  --line: rgba(255, 255, 255, .09);
  --line-strong: rgba(113, 228, 220, .2);
  --text: #f4f7fa;
  --muted: #9aa9b9;
  --quiet: #657486;
  --cyan: #75e4dc;
  --blue: #8aa7ff;
  --gold: #f0c57a;
  --sans: "Segoe UI Variable", "PingFang SC", "Microsoft YaHei UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  color: var(--text);
  background: var(--bg);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
a, button { -webkit-tap-highlight-color: transparent; }
::selection { color: #061018; background: var(--cyan); }
.shell { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }

.site-header {
  position: fixed;
  z-index: 20;
  inset: 0 0 auto;
  border-bottom: 1px solid transparent;
  transition: background .2s ease, border-color .2s ease;
}
.site-header.scrolled { border-color: var(--line); background: rgba(5, 11, 18, .86); backdrop-filter: blur(20px); }
.header-inner { min-height: 76px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 12px; width: max-content; }
.brand-mark { display: grid; place-items: center; width: 38px; height: 38px; border: 1px solid rgba(117, 228, 220, .38); border-radius: 12px; color: #071019; background: linear-gradient(135deg, var(--cyan), var(--blue)); font-size: 17px; }
.brand > span:last-child { display: grid; gap: 3px; }
.brand b { font-size: 16px; font-weight: 580; letter-spacing: -.02em; }
.brand small { color: var(--quiet); font-size: 12px; letter-spacing: .08em; }
.site-nav { display: flex; align-items: center; gap: 30px; }
.site-nav a { color: var(--muted); font-size: 14px; transition: color .15s ease; }
.site-nav a:hover, .site-nav a:focus-visible { color: var(--text); }
.project-link { justify-self: end; display: inline-flex; align-items: center; gap: 7px; min-height: 42px; padding: 0 16px; border: 1px solid var(--line); border-radius: 99px; color: #dbe4ed; font-size: 13px; background: rgba(255, 255, 255, .025); transition: border-color .15s ease, background .15s ease; }
.project-link:hover, .project-link:focus-visible { border-color: var(--line-strong); background: rgba(117, 228, 220, .06); }

.hero { position: relative; min-height: 820px; display: grid; align-items: center; padding: 132px 0 80px; overflow: hidden; background: linear-gradient(180deg, #071019 0%, #08121c 100%); }
.hero::before { content: ""; position: absolute; inset: 0; opacity: .34; background-image: linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px); background-size: 80px 80px; mask-image: linear-gradient(to bottom, #000 0%, transparent 88%); }
.hero-light { position: absolute; border-radius: 50%; pointer-events: none; filter: blur(1px); }
.hero-light-a { width: 620px; height: 620px; top: -200px; right: -220px; background: rgba(138, 167, 255, .07); box-shadow: 0 0 180px rgba(138, 167, 255, .11); }
.hero-light-b { width: 560px; height: 560px; bottom: -290px; left: -220px; background: rgba(117, 228, 220, .055); box-shadow: 0 0 180px rgba(117, 228, 220, .1); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(340px, .8fr); align-items: center; gap: 90px; }
.eyebrow { color: var(--cyan); font-size: 13px; font-weight: 600; letter-spacing: .16em; }
.hero h1 { max-width: 760px; margin: 24px 0; font-size: clamp(50px, 5.3vw, 72px); font-weight: 520; line-height: 1.05; letter-spacing: -.055em; }
.hero h1 em { color: var(--gold); font-style: normal; font-weight: 520; }
.hero-copy > p { max-width: 720px; margin: 0; color: #b2bfcc; font-size: 18px; line-height: 1.85; }
.hero-actions { display: flex; gap: 12px; margin-top: 36px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 22px; border-radius: 13px; font-size: 15px; transition: transform .15s ease, border-color .15s ease, background .15s ease; }
.button:hover { transform: translateY(-1px); }
.button.primary { color: #061018; background: linear-gradient(135deg, #8cece5, #86a9ff); }
.button.secondary { border: 1px solid var(--line); color: #dbe4ed; background: rgba(255, 255, 255, .03); }
.business-card { padding: 34px; border: 1px solid var(--line-strong); border-radius: 30px; background: linear-gradient(145deg, rgba(18, 34, 47, .92), rgba(9, 20, 31, .8)); box-shadow: 0 34px 90px rgba(0,0,0,.32); backdrop-filter: blur(22px); }
.business-card > small { color: var(--cyan); font-size: 12px; letter-spacing: .15em; }
.business-card h2 { margin: 18px 0 30px; font-size: 30px; font-weight: 520; line-height: 1.35; letter-spacing: -.035em; }
.principle-list { display: grid; gap: 0; }
.principle-list span { display: grid; grid-template-columns: 36px 1fr; align-items: center; gap: 12px; min-height: 60px; border-top: 1px solid var(--line); color: #c5d0da; font-size: 15px; line-height: 1.5; }
.principle-list i { color: var(--quiet); font-size: 12px; font-style: normal; }

.signal-strip { border-block: 1px solid var(--line); background: rgba(4, 9, 15, .68); }
.signal-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.signal-grid div { min-height: 132px; display: flex; flex-direction: column; justify-content: center; padding: 24px 28px; border-right: 1px solid var(--line); }
.signal-grid div:first-child { border-left: 1px solid var(--line); }
.signal-grid strong { font-size: 25px; font-weight: 520; letter-spacing: -.04em; }
.signal-grid span { margin-top: 8px; color: var(--muted); font-size: 14px; line-height: 1.5; }

.section { padding: 126px 0; }
.section-soft { border-block: 1px solid var(--line); background: linear-gradient(145deg, rgba(255,255,255,.018), rgba(255,255,255,.006)); }
.section-head { max-width: 780px; }
.section-head.centered { margin-inline: auto; text-align: center; }
.section-head h2 { margin: 16px 0; font-size: clamp(40px, 5vw, 62px); font-weight: 500; line-height: 1.12; letter-spacing: -.052em; }
.section-head p { margin: 0; color: var(--muted); font-size: 17px; line-height: 1.8; }
.model-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 58px; }
.model-grid article { min-height: 330px; display: flex; flex-direction: column; padding: 30px; border: 1px solid var(--line); border-radius: 26px; background: linear-gradient(145deg, rgba(255,255,255,.035), rgba(255,255,255,.012)); }
.model-grid article.accent-card { border-color: var(--line-strong); background: linear-gradient(145deg, rgba(117,228,220,.075), rgba(138,167,255,.035)); }
.card-index { color: var(--cyan); font-size: 13px; letter-spacing: .12em; }
.model-grid h3 { margin: 48px 0 15px; font-size: 27px; font-weight: 540; letter-spacing: -.035em; }
.model-grid p { margin: 0; color: var(--muted); font-size: 16px; line-height: 1.75; }
.model-grid small { margin-top: auto; padding-top: 32px; color: var(--quiet); font-size: 13px; line-height: 1.55; }
.support-grid { display: grid; grid-template-columns: .82fr 1.18fr; gap: 100px; align-items: start; }
.compact-head { position: sticky; top: 118px; }
.support-list { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.support-list article { min-height: 240px; padding: 26px; border: 1px solid var(--line); border-radius: 24px; background: rgba(8, 18, 28, .72); }
.support-list article > span { color: var(--cyan); font-size: 13px; }
.support-list h3 { margin: 38px 0 12px; font-size: 22px; font-weight: 540; letter-spacing: -.025em; }
.support-list p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.7; }
.process-list { counter-reset: steps; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin: 62px 0 0; padding: 0; list-style: none; }
.process-list li { position: relative; min-height: 190px; padding: 32px 28px; border-block: 1px solid var(--line); border-right: 1px solid var(--line); }
.process-list li:first-child { border-left: 1px solid var(--line); border-radius: 22px 0 0 22px; }
.process-list li:last-child { border-radius: 0 22px 22px 0; }
.process-list li::before { counter-increment: steps; content: "0" counter(steps); display: block; margin-bottom: 44px; color: var(--cyan); font-size: 13px; letter-spacing: .1em; }
.process-list b { display: block; font-size: 20px; font-weight: 550; }
.process-list span { display: block; margin-top: 11px; color: var(--muted); font-size: 14px; line-height: 1.6; }

.project-promo { padding: 0 0 126px; }
.project-promo-card { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 60px; min-height: 330px; padding: 58px; overflow: hidden; border: 1px solid rgba(240,197,122,.22); border-radius: 32px; background: radial-gradient(circle at 88% 20%, rgba(138,167,255,.14), transparent 30%), linear-gradient(135deg, rgba(240,197,122,.08), rgba(117,228,220,.045)); transition: border-color .18s ease, transform .18s ease; }
.project-promo-card:hover { border-color: rgba(240,197,122,.4); transform: translateY(-2px); }
.project-promo-card h2 { max-width: 760px; margin: 18px 0 15px; font-size: clamp(35px, 4.6vw, 56px); font-weight: 500; line-height: 1.12; letter-spacing: -.05em; }
.project-promo-card p { max-width: 720px; margin: 0; color: var(--muted); font-size: 16px; line-height: 1.75; }
.promo-action { display: inline-flex; align-items: center; gap: 12px; min-height: 54px; padding: 0 22px; border: 1px solid rgba(255,255,255,.12); border-radius: 99px; color: #eff4f7; background: rgba(255,255,255,.04); white-space: nowrap; }
.promo-action i { color: var(--cyan); font-size: 20px; font-style: normal; }

.site-footer { border-top: 1px solid var(--line); background: var(--bg-deep); }
.footer-main { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: 64px; padding: 48px 0 36px; }
.footer-main p { justify-self: end; max-width: 620px; margin: 0; color: var(--muted); font-size: 14px; line-height: 1.7; text-align: right; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; min-height: 64px; border-top: 1px solid rgba(255,255,255,.05); color: #596879; font-size: 12px; }
.backoffice-entry { color: #526174; font-size: 12px; opacity: .58; transition: color .15s ease, opacity .15s ease; }
.backoffice-entry:hover, .backoffice-entry:focus-visible { color: #b5c0cb; opacity: 1; }

@media (max-width: 980px) {
  .shell { width: min(100% - 36px, 760px); }
  .header-inner { grid-template-columns: 1fr auto; }
  .site-nav { display: none; }
  .hero { min-height: auto; }
  .hero-grid, .support-grid { grid-template-columns: 1fr; gap: 48px; }
  .compact-head { position: static; }
  .signal-grid { grid-template-columns: 1fr 1fr; }
  .signal-grid div:nth-child(3) { border-left: 1px solid var(--line); }
  .signal-grid div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .model-grid { grid-template-columns: 1fr; }
  .model-grid article { min-height: 270px; }
  .process-list { grid-template-columns: 1fr 1fr; }
  .process-list li:first-child { border-radius: 22px 0 0 0; }
  .process-list li:nth-child(2) { border-radius: 0 22px 0 0; }
  .process-list li:nth-child(3) { border-left: 1px solid var(--line); border-top: 0; border-radius: 0 0 0 22px; }
  .process-list li:last-child { border-top: 0; border-radius: 0 0 22px 0; }
  .project-promo-card { grid-template-columns: 1fr; }
  .promo-action { width: max-content; }
}

@media (max-width: 640px) {
  .shell { width: min(100% - 26px, 560px); }
  .header-inner { min-height: 70px; }
  .brand b { font-size: 15px; }
  .brand small { font-size: 11px; }
  .project-link.compact { width: 42px; justify-content: center; padding: 0; font-size: 0; }
  .project-link.compact span { font-size: 17px; }
  .hero { padding: 116px 0 70px; }
  .hero h1 { font-size: 45px; }
  .hero-copy > p { font-size: 16px; }
  .hero-actions { flex-direction: column; }
  .button { width: 100%; }
  .business-card { padding: 26px 22px; border-radius: 24px; }
  .signal-grid { grid-template-columns: 1fr; }
  .signal-grid div { min-height: 110px; border-left: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .signal-grid div:last-child { border-bottom: 0; }
  .section { padding: 92px 0; }
  .section-head h2 { font-size: 38px; }
  .support-list { grid-template-columns: 1fr; }
  .process-list { grid-template-columns: 1fr; }
  .process-list li, .process-list li:first-child, .process-list li:nth-child(2), .process-list li:nth-child(3), .process-list li:last-child { min-height: 150px; border: 1px solid var(--line); border-bottom: 0; border-radius: 0; }
  .process-list li:first-child { border-radius: 20px 20px 0 0; }
  .process-list li:last-child { border-bottom: 1px solid var(--line); border-radius: 0 0 20px 20px; }
  .process-list li::before { margin-bottom: 25px; }
  .project-promo { padding-bottom: 92px; }
  .project-promo-card { min-height: 0; padding: 34px 24px; border-radius: 24px; }
  .project-promo-card h2 { font-size: 36px; }
  .promo-action { width: 100%; justify-content: center; }
  .footer-main { grid-template-columns: 1fr; gap: 22px; padding: 38px 0 28px; }
  .footer-main p { justify-self: start; text-align: left; }
  .footer-bottom { align-items: flex-end; gap: 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}