:root {
  --white: #ffffff;
  --ink: #30394d;
  --muted: #66758d;
  --accent: #2fb1bb;
  --accent-bright: #49bed5;
  --aqua-50: #f3fbfd;
  --aqua-100: #e2f5f9;
  --aqua-200: #c7ebf2;
  --dark: #17263a;
  --line: rgba(49, 158, 186, 0.32);
  --page: min(1400px, calc(100vw - 112px));
  --header-h: 92px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: Inter, "Avenir Next", "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.nowrap { white-space: nowrap; }
.page-shell { width: var(--page); margin-inline: auto; position: relative; z-index: 2; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  height: var(--header-h);
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 max(48px, calc((100vw - 1360px) / 2));
  transition: background-color .35s ease, box-shadow .35s ease, height .35s ease;
}
.site-header.is-scrolled {
  height: 72px;
  background: rgba(255,255,255,.9);
  box-shadow: 0 1px 0 rgba(47,57,77,.07);
  backdrop-filter: blur(16px);
}
.brand { width: 190px; height: 68px; display: flex; align-items: center; }
.brand img { display: block; width: 100%; height: auto; }
.desktop-nav { display: flex; align-items: center; gap: 38px; font-size: 14px; letter-spacing: .01em; }
.desktop-nav a { position: relative; }
.desktop-nav a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: -8px; height: 1px;
  background: var(--accent); transition: right .25s ease;
}
.desktop-nav a:hover::after, .desktop-nav a:focus-visible::after { right: 0; }
.language-menu { position: relative; }
.language-button {
  display: inline-flex; align-items: center; gap: 9px; border: 0; border-left: 1px solid #cbd6dc;
  background: transparent; color: var(--ink); padding: 2px 0 2px 30px; cursor: pointer;
}
.language-button svg { width: 11px; height: 8px; fill: none; stroke: currentColor; stroke-width: 1.4; transition: transform .2s ease; }
.language-menu.is-open .language-button svg { transform: rotate(180deg); }
.language-options {
  position: absolute; top: calc(100% + 15px); right: 0; min-width: 156px; padding: 7px;
  border: 1px solid rgba(47,57,77,.1); border-radius: 12px; background: rgba(255,255,255,.97);
  box-shadow: 0 18px 45px rgba(24,42,61,.14); opacity: 0; visibility: hidden;
  transform: translateY(-7px); transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
}
.language-menu.is-open .language-options { opacity: 1; visibility: visible; transform: none; }
.language-options button {
  display: block; width: 100%; padding: 10px 12px; border: 0; border-radius: 8px; background: transparent;
  color: var(--ink); text-align: left; white-space: nowrap; cursor: pointer;
}
.language-options button:hover, .language-options button:focus-visible { background: var(--aqua-50); }
.language-options button.is-active { color: var(--accent); background: var(--aqua-50); }
.menu-button, .mobile-nav { display: none; }

.hero { min-height: 900px; height: 100svh; position: relative; overflow: hidden; display: flex; align-items: center; }
.hero::before {
  content: ""; position: absolute; width: 560px; height: 560px; left: -255px; top: -330px;
  border: 1px solid rgba(61,176,198,.25); border-radius: 50%; background: rgba(194,235,243,.65);
}
.hero-content { padding-top: 80px; }
.hero h1, .section h2, .contact h2 {
  margin: 0; color: var(--ink); letter-spacing: -.055em; font-weight: 500;
}
.mobile-break { display: none; }
.hero h1 { max-width: 820px; font-size: 80px; line-height: .98; }
.hero-copy { max-width: 570px; margin: 32px 0 0; color: var(--ink); font-size: 20px; line-height: 1.55; }
.hero-actions { display: flex; align-items: center; gap: 34px; margin-top: 40px; }
.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 18px; min-height: 58px;
  padding: 0 34px; border-radius: 999px; font-size: 16px; transition: transform .25s var(--ease), box-shadow .25s ease;
}
.button svg, .text-link svg { width: 19px; fill: none; stroke: currentColor; stroke-width: 1.7; }
.button-primary { color: #fff; background: var(--accent); box-shadow: 0 12px 30px rgba(47,177,187,.18); }
.button-primary:hover { transform: translateY(-3px); box-shadow: 0 17px 34px rgba(47,177,187,.28); }
.text-link { display: inline-flex; align-items: center; gap: 10px; padding-bottom: 5px; border-bottom: 1px solid var(--accent); font-size: 16px; }
.disciplines { margin: 86px 0 0; color: #758aa4; font: 500 12px/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .17em; text-transform: uppercase; }
.scroll-cue { position: absolute; left: 50%; bottom: 26px; z-index: 4; display: grid; place-items: center; gap: 8px; }
.scroll-cue span { width: 1px; height: 24px; background: #9daebb; }
.scroll-cue svg { width: 25px; fill: none; stroke: var(--ink); stroke-width: 1.5; }

.hero-field { position: absolute; inset: 0 0 0 44%; overflow: hidden; }
.wash { position: absolute; border-radius: 50%; filter: blur(2px); }
.wash-one { width: 560px; height: 560px; top: 8%; left: 6%; background: radial-gradient(circle, rgba(197,236,243,.73), rgba(234,248,251,.35) 56%, transparent 72%); }
.wash-two { width: 720px; height: 720px; right: -20%; bottom: -38%; background: rgba(104,199,217,.34); }
.plane, .mini-plane, .about-plane {
  position: absolute; border: 2px solid rgba(255,255,255,.85); border-radius: 20px;
  background: linear-gradient(145deg, rgba(138,215,228,.28), rgba(76,181,205,.12));
  box-shadow: inset 0 0 40px rgba(255,255,255,.25);
  transform: skewY(27deg) rotate(-7deg);
}
.plane-one { width: 300px; height: 470px; left: 20%; top: 27%; }
.plane-two { width: 310px; height: 560px; left: 38%; top: 18%; }
.plane-three { width: 340px; height: 610px; left: 56%; top: 13%; }
.orbit { position: absolute; border: 1.5px solid rgba(44,176,203,.55); border-radius: 50%; transform: rotate(-12deg); }
.orbit-one { width: 840px; height: 330px; left: -1%; top: 36%; }
.orbit-two { width: 700px; height: 660px; right: -36%; top: 22%; border-color: rgba(255,255,255,.8); }
.node { position: absolute; width: 12px; height: 12px; border: 2px solid #fff; border-radius: 50%; background: var(--accent-bright); box-shadow: 0 0 0 1px rgba(55,175,200,.2); }
.node-one { left: 20%; top: 51%; }.node-two { left: 55%; top: 75%; }.node-three { right: 8%; top: 26%; }
.field-words { position: absolute; right: 13%; top: 39%; display: grid; gap: 24px; color: #7896ad; font: 500 11px/1 ui-monospace, monospace; letter-spacing: .2em; text-transform: uppercase; transform: rotate(-3deg); }

.section { position: relative; overflow: hidden; }
.section-label { margin: 0 0 30px; color: #527696; font: 600 12px/1 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .21em; text-transform: uppercase; }
.section-label::after { content: ""; display: block; width: 74px; height: 1px; margin-top: 16px; background: var(--accent-bright); }
.capabilities { min-height: 670px; padding: 110px 0 92px; }
.capabilities h2, .process h2, .about h2 { font-size: 68px; line-height: 1.02; }
.capability-rail { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); gap: 68px; margin-top: 80px; }
.capability-rail::before { content: ""; position: absolute; left: 8px; right: 8px; top: 0; height: 1px; background: var(--line); }
.capability-rail article { position: relative; padding: 31px 8px 0 4px; }
.rail-node { position: absolute; top: -10px; left: 0; width: 21px; height: 21px; border-radius: 50%; border: 5px solid #e6f5f7; background: var(--accent); box-shadow: 0 0 0 1px rgba(47,177,187,.35); }
.capability-rail h3 { margin: 0 0 12px; font-size: 24px; font-weight: 500; letter-spacing: -.02em; }
.capability-rail p { max-width: 290px; margin: 0; color: var(--muted); font-size: 17px; line-height: 1.55; }
.capability-rail-four { grid-template-columns: repeat(4, 1fr); gap: 44px; }
.capability-rail-four p { max-width: 245px; }
.section-link { margin-top: 62px; }
.section-geometry { position: absolute; inset: 0 0 0 47%; }
.soft-disc { position: absolute; width: 520px; height: 520px; top: -130px; right: 7%; border-radius: 50%; background: radial-gradient(circle, rgba(197,237,244,.62), transparent 68%); }
.mini-plane { width: 220px; height: 380px; top: 54px; }
.mini-plane.p1 { left: 16%; }.mini-plane.p2 { left: 35%; }.mini-plane.p3 { left: 54%; }
.sweep { position: absolute; width: 770px; height: 280px; border: 1px dashed rgba(43,170,198,.42); border-radius: 50%; left: 4%; top: 80px; transform: rotate(-12deg); }

.process { min-height: 505px; padding: 94px 0; background: linear-gradient(110deg, var(--aqua-100), #eefbfe 65%, #d7f2f7); }
.process-grid { display: grid; grid-template-columns: .72fr 1fr; gap: 80px; align-items: center; }
.process h2 { font-size: 56px; }
.process-steps { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px; list-style: none; padding: 0; margin: 60px 0 0; }
.process-steps::before { content: ""; position: absolute; top: 54px; left: 5px; right: 5px; height: 1px; background: var(--line); }
.process-steps li { position: relative; padding-top: 82px; }
.step-number { position: absolute; top: 0; color: #75bbd2; font-size: 42px; font-weight: 300; }
.step-node { position: absolute; top: 45px; left: 1px; width: 20px; height: 20px; border-radius: 50%; border: 5px solid rgba(226,247,250,.95); background: var(--accent); box-shadow: 0 0 0 1px rgba(47,177,187,.35); }
.process-steps h3 { margin: 0 0 9px; font-size: 22px; font-weight: 500; }
.process-steps p { margin: 0; color: var(--muted); font-size: 16px; line-height: 1.45; }
.process-orbit { position: absolute; width: 500px; height: 500px; left: -320px; top: -120px; border: 1px solid rgba(255,255,255,.9); border-radius: 50%; }

.about { min-height: 620px; padding: 125px 0; }
.about .page-shell { width: var(--page); }
.about h2 { max-width: 680px; }
.about p { max-width: 600px; margin: 30px 0 26px; color: var(--muted); font-size: 18px; line-height: 1.55; }
.about-visual { position: absolute; inset: 0 0 0 50%; overflow: hidden; }
.about-disc { position: absolute; width: 500px; height: 500px; right: 5%; top: -60px; border-radius: 50%; background: radial-gradient(circle, rgba(204,241,246,.8), rgba(237,250,252,.5) 58%, transparent 72%); }
.about-plane { width: 230px; height: 390px; top: 80px; }
.about-plane.ap1 { left: 12%; }.about-plane.ap2 { left: 32%; }.about-plane.ap3 { left: 52%; }
.about-orbit { position: absolute; width: 790px; height: 280px; top: 115px; left: -10%; border: 1px dashed rgba(43,170,198,.48); border-radius: 50%; transform: rotate(-14deg); }
.about-node { position: absolute; width: 11px; height: 11px; border-radius: 50%; background: var(--accent); left: 27%; top: 61%; }

.scope { padding: 112px 0; color: #fff; background: var(--dark); }
.scope .page-shell { display: grid; grid-template-columns: .9fr 1.1fr; gap: 110px; align-items: end; }
.scope .section-label { color: #83cbd7; }
.scope h2 { color: #fff; font-size: 64px; line-height: 1.04; }
.scope-heading > p:last-child { max-width: 570px; margin: 28px 0 0; color: #b9cbd5; font-size: 17px; line-height: 1.6; }
.scope-list { border-top: 1px solid rgba(255,255,255,.2); }
.scope-list a { display: grid; grid-template-columns: 54px 1fr; gap: 16px; align-items: center; min-height: 76px; border-bottom: 1px solid rgba(255,255,255,.2); transition: padding .25s ease, color .25s ease; }
.scope-list a:hover { padding-left: 10px; color: #78d2dd; }
.scope-list span { color: #65b7c7; font: 500 12px/1 ui-monospace, monospace; }
.scope-list strong { font-size: 18px; font-weight: 450; }

.page-hero { min-height: 760px; position: relative; overflow: hidden; display: flex; align-items: center; padding-top: 70px; background: #fff; }
.page-hero .page-shell { z-index: 2; }
.page-hero h1 { max-width: 1040px; margin: 0; color: var(--ink); font-size: 88px; font-weight: 500; line-height: .99; letter-spacing: -.055em; }
.page-hero .page-shell > p:last-child { max-width: 730px; margin: 34px 0 0; color: var(--muted); font-size: 20px; line-height: 1.55; }
.page-hero-geometry { position: absolute; inset: 0 0 0 50%; overflow: hidden; }
.page-hero-geometry span { position: absolute; width: 330px; height: 570px; top: 125px; border: 2px solid rgba(255,255,255,.9); border-radius: 24px; background: linear-gradient(145deg, rgba(138,215,228,.3), rgba(76,181,205,.1)); transform: skewY(27deg) rotate(-7deg); }
.page-hero-geometry span:first-child { left: 20%; }
.page-hero-geometry span:nth-child(2) { left: 48%; }
.page-hero-geometry i { position: absolute; width: 790px; height: 300px; left: 0; top: 230px; border: 1px solid rgba(47,177,187,.48); border-radius: 50%; transform: rotate(-13deg); }

.detail-section { position: relative; padding: 120px 0; overflow: hidden; }
.service-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 90px; }
.service-grid article { position: relative; min-height: 430px; padding: 48px 10px 58px 86px; border-top: 1px solid var(--line); }
.service-grid article:nth-child(n+3) { border-bottom: 1px solid var(--line); }
.detail-number { position: absolute; left: 0; top: 50px; color: var(--accent); font: 500 13px/1 ui-monospace, monospace; letter-spacing: .12em; }
.service-grid h2 { margin: 0 0 22px; font-size: 42px; font-weight: 500; letter-spacing: -.035em; }
.service-grid p { max-width: 520px; margin: 0 0 24px; color: var(--muted); font-size: 17px; line-height: 1.65; }
.service-grid ul { margin: 0; padding: 0; list-style: none; color: var(--ink); font-size: 15px; line-height: 1.9; }
.service-grid li::before { content: "—"; margin-right: 10px; color: var(--accent); }

.opportunity-section { background: var(--aqua-50); }
.section-intro { max-width: 780px; margin-bottom: 72px; }
.section-intro h2 { margin: 0; font-size: 68px; font-weight: 500; line-height: 1.03; letter-spacing: -.05em; }
.section-intro > p:last-child { max-width: 690px; margin: 28px 0 0; color: var(--muted); font-size: 18px; line-height: 1.6; }
.opportunity-grid { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); }
.opportunity-grid article { display: grid; grid-template-columns: 48px 1fr; column-gap: 24px; padding: 34px 38px 36px 0; border-bottom: 1px solid var(--line); }
.opportunity-grid article:nth-child(odd) { border-right: 1px solid var(--line); }
.opportunity-grid article:nth-child(even) { padding-left: 38px; }
.opportunity-grid span, .collaboration-list span { grid-row: 1 / span 2; color: var(--accent); font: 500 12px/1.5 ui-monospace, monospace; }
.opportunity-grid h3, .collaboration-list h3 { margin: 0 0 10px; font-size: 22px; font-weight: 500; }
.opportunity-grid p, .collaboration-list p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.55; }

.native-section { background: #fff; }
.native-section .page-shell { display: grid; grid-template-columns: .9fr 1.1fr; gap: 110px; align-items: start; }
.native-section .section-intro { position: sticky; top: 115px; margin: 0; }
.principle-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.principle-list li { display: grid; grid-template-columns: 50px 1fr; gap: 22px; padding: 30px 0; border-bottom: 1px solid var(--line); }
.principle-list > li > span { color: var(--accent); font: 500 12px/1.6 ui-monospace, monospace; }
.principle-list h3 { margin: 0 0 9px; font-size: 20px; font-weight: 500; }
.principle-list p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.55; }

.process-five { min-height: auto; padding: 110px 0; }
.process-five h2 { margin: 0; font-size: 64px; font-weight: 500; line-height: 1.03; letter-spacing: -.05em; }
.five-steps { grid-template-columns: repeat(5, 1fr); gap: 36px; margin-top: 80px; }

.collaboration-section { background: #fff; }
.collaboration-section .page-shell { display: grid; grid-template-columns: .8fr 1.2fr; gap: 120px; }
.collaboration-list { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); }
.collaboration-list article { display: grid; grid-template-columns: 40px 1fr; column-gap: 16px; padding: 30px 24px 38px 0; border-bottom: 1px solid var(--line); }
.collaboration-list article:nth-child(odd) { border-right: 1px solid var(--line); }
.collaboration-list article:nth-child(even) { padding-left: 24px; }

.about-story { padding-top: 80px; }
.story-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 120px; align-items: start; }
.story-statement p { margin: 0; color: var(--ink); font-size: 56px; line-height: 1.08; letter-spacing: -.045em; }
.story-copy { padding-top: 8px; }
.story-copy p { margin: 0 0 28px; color: var(--muted); font-size: 19px; line-height: 1.7; }
.principles-section { background: var(--aqua-50); }
.principles-section .page-shell { display: grid; grid-template-columns: .9fr 1.1fr; gap: 110px; }
.principles-section .section-intro { position: sticky; top: 115px; margin: 0; }
.company-band { padding: 100px 0; color: #fff; background: var(--dark); }
.company-band h2 { margin: 0 0 24px; color: #6bd0db; font-size: 96px; font-weight: 500; letter-spacing: -.055em; }
.company-band .page-shell > p[data-copy="companyBody"] { max-width: 730px; margin: 0; color: #becdd7; font-size: 18px; line-height: 1.65; }
.company-office { display: grid; grid-template-columns: 160px minmax(0, 600px); gap: 26px; align-items: start; margin-top: 44px; padding-top: 30px; border-top: 1px solid rgba(255,255,255,.18); color: #e4f1f4; }
.company-office span { color: #76ced9; font: 600 12px/1.5 ui-monospace, monospace; letter-spacing: .12em; text-transform: uppercase; }
.company-office address { margin: 0; font-size: 15px; font-style: normal; line-height: 1.65; }

.page-contact { position: relative; padding: 94px 0 0; overflow: hidden; color: #fff; background: radial-gradient(circle at 82% 8%, #24485e, var(--dark) 42%, #172236 78%); }
.page-contact > .page-shell > h2 { margin: 0; font-size: 82px; font-weight: 500; line-height: .99; letter-spacing: -.055em; }
.page-contact > .page-shell > p { max-width: 720px; margin: 26px 0 34px; color: #bed0dd; font-size: 18px; line-height: 1.55; }
.page-contact .site-footer { margin-top: 85px; }

.contact { position: relative; min-height: 600px; padding: 78px 0 0; overflow: hidden; color: #fff; background: radial-gradient(circle at 78% 26%, #23455c 0, var(--dark) 38%, #172236 75%); }
.contact h2 { color: #fff; font-size: 82px; line-height: .98; }
.contact h2::first-line { color: var(--accent-bright); }
.contact > .page-shell > p { max-width: 650px; margin: 24px 0 30px; color: #bed0dd; font-size: 18px; line-height: 1.5; }
.contact .button { min-height: 54px; }
.contact-orbits span { position: absolute; border: 1px solid rgba(142,211,225,.48); border-radius: 50%; }
.contact-orbits span:first-child { width: 640px; height: 640px; right: -170px; top: -205px; }
.contact-orbits span:nth-child(2) { width: 850px; height: 270px; right: -150px; top: 180px; transform: rotate(-38deg); }
.contact-orbits i { position: absolute; width: 13px; height: 13px; border-radius: 50%; background: #75d6e4; right: 19%; top: 46%; }
.site-footer { display: grid; grid-template-columns: 220px 1fr minmax(300px, 390px); gap: 50px; align-items: center; min-height: 156px; margin-top: 66px; border-top: 1px solid rgba(255,255,255,.16); color: #dbe7ed; }
.footer-brand { display: flex; align-items: center; width: 188px; }
.footer-brand img { display: block; width: 100%; height: auto; }
.site-footer nav { display: flex; gap: 34px; font-size: 13px; }
.site-footer nav a:hover { color: #fff; }
.footer-legal { padding-left: 34px; border-left: 1px solid rgba(255,255,255,.28); font-size: 12px; line-height: 1.7; }
.footer-legal p { margin: 0; }
.footer-address { max-width: 370px; margin: 4px 0 !important; color: #aebfca; }

.hero h1, .section h2, .page-hero h1, .section-intro h2, .story-statement p,
.company-band h2, .contact h2, .page-contact h2 {
  text-wrap: balance;
  word-break: auto-phrase;
}

.reveal { opacity: 0; transform: translateY(22px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 1050px) {
  :root { --page: min(900px, calc(100vw - 64px)); }
  .hero-field { left: 50%; opacity: .78; }
  .hero h1 { font-size: 70px; }
  .capabilities h2, .about h2, .section-intro h2 { font-size: 58px; }
  .process h2, .process-five h2 { font-size: 54px; }
  .scope h2 { font-size: 54px; }
  .page-hero h1 { font-size: 70px; }
  .story-statement p { font-size: 50px; }
  .company-band h2 { font-size: 78px; }
  .contact h2, .page-contact > .page-shell > h2 { font-size: 68px; }
  .hero h1 br, .capabilities h2 br, .about h2 br, .scope h2 br, .page-hero h1 br,
  .section-intro h2 br, .collaboration-section h2 br, .contact h2 br, .page-contact h2 br { display: none; }
  .process-grid { grid-template-columns: 1fr; gap: 30px; }
  .process-steps { margin-top: 15px; }
  .site-footer { grid-template-columns: auto 1fr; }
  .footer-legal { grid-column: 1 / -1; padding: 18px 0 0; border-left: 0; border-top: 1px solid rgba(255,255,255,.12); }
  .capability-rail-four { grid-template-columns: repeat(2, 1fr); gap: 28px 48px; }
  .capability-rail-four::before { display: none; }
  .capability-rail-four article { border-top: 1px solid var(--line); }
  .scope .page-shell, .native-section .page-shell, .collaboration-section .page-shell, .story-grid, .principles-section .page-shell { grid-template-columns: 1fr; gap: 64px; }
  .native-section .section-intro, .principles-section .section-intro { position: static; }
  .five-steps { grid-template-columns: repeat(3, 1fr); row-gap: 52px; }
  .five-steps::before { display: none; }
  .five-steps li { border-top: 1px solid var(--line); }
}

@media (max-width: 760px) {
  :root { --page: calc(100vw - 40px); --header-h: 74px; }
  .site-header { padding: 0 20px; }
  .site-header.is-scrolled { height: 66px; }
  .brand { width: 158px; height: 58px; }
  .desktop-nav { display: none; }
  .menu-button { display: grid; gap: 6px; width: 42px; height: 42px; place-content: center; border: 0; background: transparent; cursor: pointer; z-index: 3; }
  .menu-button span { display: block; width: 23px; height: 1px; background: var(--ink); transition: transform .25s ease; }
  .menu-button.is-open span:first-child { transform: translateY(3.5px) rotate(45deg); }
  .menu-button.is-open span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
  .mobile-nav { position: fixed; inset: 0; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 28px; background: rgba(255,255,255,.98); font-size: 26px; opacity: 0; visibility: hidden; transition: opacity .25s ease; }
  .mobile-nav.is-open { opacity: 1; visibility: visible; }
  .mobile-nav .language-menu { display: flex; flex-direction: column; align-items: center; }
  .mobile-nav .language-button { border: 0; padding: 12px 0; color: var(--accent); font-size: 18px; }
  .mobile-nav .language-options { position: static; display: none; min-width: 150px; padding: 4px 0 0; border: 0; background: transparent; box-shadow: none; opacity: 1; visibility: visible; transform: none; }
  .mobile-nav .language-menu.is-open .language-options { display: block; }
  .mobile-nav .language-options button { padding: 8px 12px; font-size: 16px; text-align: center; }
  .hero { min-height: 780px; height: 100svh; align-items: flex-start; padding-top: 158px; }
  .hero-content { padding-top: 0; }
  .hero h1 { max-width: 100%; font-size: 50px; line-height: .98; }
  .hero-copy { max-width: 92%; margin-top: 25px; font-size: 17px; line-height: 1.48; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 25px; margin-top: 32px; }
  .button { min-height: 54px; padding: 0 25px; font-size: 15px; }
  .disciplines { margin-top: 50px; font-size: 10px; letter-spacing: .12em; }
  .hero-field { inset: 0; opacity: .54; pointer-events: none; }
  .hero-field .plane { transform: scale(.6) skewY(27deg) rotate(-7deg); transform-origin: bottom right; }
  .plane-one { left: 22%; top: 43%; }.plane-two { left: 42%; top: 38%; }.plane-three { left: 60%; top: 34%; }
  .field-words { display: none; }
  .scroll-cue { display: none; }
  .section-label { margin-bottom: 25px; }
  .capabilities { padding: 86px 0 72px; }
  .capabilities h2, .process h2, .about h2 { font-size: 42px; }
  .section-geometry { left: 65%; opacity: .42; }
  .capability-rail { grid-template-columns: 1fr; gap: 0; margin-top: 60px; padding-left: 24px; }
  .capability-rail::before { top: 0; bottom: 0; left: 4px; right: auto; width: 1px; height: auto; }
  .capability-rail article { padding: 0 0 48px 24px; }
  .rail-node { top: 2px; left: -30px; }
  .capability-rail h3 { font-size: 22px; }
  .capability-rail p { font-size: 16px; }
  .capability-rail-four article { border-top: 0; }
  .scope { padding: 82px 0; }
  .scope .page-shell { gap: 58px; }
  .scope h2 { font-size: 40px; }
  .scope-list strong { font-size: 16px; }
  .process { padding: 80px 0 70px; }
  .process-grid { gap: 45px; }
  .process-steps { grid-template-columns: 1fr; gap: 28px; margin: 0; padding-left: 34px; }
  .process-steps::before { top: 7px; bottom: 10px; left: 7px; right: auto; width: 1px; height: auto; }
  .process-steps li { padding: 0 0 0 38px; min-height: 82px; }
  .step-number { position: static; display: block; margin-bottom: 7px; font-size: 25px; }
  .step-node { top: 2px; left: -35px; }
  .about { min-height: 670px; padding: 85px 0 250px; }
  .about p { font-size: 16px; }
  .about-visual { inset: auto 0 0 12%; height: 300px; opacity: .76; }
  .about-plane { transform: scale(.63) skewY(27deg) rotate(-7deg); transform-origin: bottom left; top: 0; }
  .contact { min-height: 720px; padding-top: 76px; }
  .contact h2 { font-size: 50px; }
  .contact > .page-shell > p { max-width: 90%; font-size: 16px; }
  .site-footer { grid-template-columns: 1fr; align-items: start; gap: 30px; min-height: 330px; padding: 42px 0; margin-top: 70px; }
  .footer-brand { width: 180px; }
  .site-footer nav { flex-wrap: wrap; gap: 18px 26px; }
  .footer-legal { grid-column: auto; }
  .page-hero { min-height: 690px; padding-top: 100px; align-items: center; }
  .page-hero h1 { font-size: 50px; }
  .page-hero .page-shell > p:last-child { max-width: 94%; font-size: 17px; }
  .page-hero-geometry { inset: auto 0 0 25%; height: 330px; opacity: .55; }
  .page-hero-geometry span { transform: scale(.58) skewY(27deg) rotate(-7deg); transform-origin: bottom left; top: 0; }
  .detail-section { padding: 82px 0; }
  .service-grid, .opportunity-grid, .collaboration-list { grid-template-columns: 1fr; }
  .service-grid { gap: 0; }
  .service-grid article { min-height: 0; padding: 36px 0 46px 54px; }
  .service-grid article:nth-child(n+3) { border-bottom: 0; }
  .service-grid article:last-child { border-bottom: 1px solid var(--line); }
  .detail-number { top: 39px; }
  .service-grid h2 { font-size: 34px; }
  .section-intro { margin-bottom: 54px; }
  .section-intro h2 { font-size: 42px; }
  .opportunity-grid article, .opportunity-grid article:nth-child(even), .collaboration-list article, .collaboration-list article:nth-child(even) { padding: 28px 0; border-right: 0; }
  .native-section .page-shell, .collaboration-section .page-shell, .story-grid, .principles-section .page-shell { gap: 48px; }
  .five-steps { grid-template-columns: 1fr; padding-left: 34px; margin-top: 54px; }
  .five-steps li { border-top: 0; }
  .company-band { padding: 80px 0; }
  .company-band h2 { font-size: 60px; }
  .company-office { grid-template-columns: 1fr; gap: 12px; margin-top: 36px; padding-top: 24px; }
  .page-contact { padding-top: 76px; }
  .page-contact > .page-shell > h2 { font-size: 48px; }
  .page-contact > .page-shell > p { font-size: 16px; }
}

@media (max-width: 420px) {
  .hero h1, .page-hero h1 { font-size: 44px; }
  html:lang(zh) .hero h1 { font-size: 40px; word-break: keep-all; }
  html:lang(zh) .hero h1 br { display: block; }
  html:lang(zh) .hero h1 .mobile-break { display: inline; }
  .capabilities h2, .process h2, .about h2, .section-intro h2 { font-size: 38px; }
  .scope h2 { font-size: 36px; }
  .contact h2, .page-contact > .page-shell > h2 { font-size: 43px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}