:root {
  --ink: #14201d;
  --muted: #64706c;
  --paper: #f4f1e8;
  --cream: #fbfaf5;
  --forest: #102a25;
  --forest-2: #173b34;
  --lime: #cbff62;
  --coral: #ff735c;
  --line: rgba(20, 32, 29, .16);
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--cream);
  font-family: Inter, "SF Pro Display", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.progress { position: fixed; z-index: 100; left: 0; top: 0; width: 100%; height: 3px; }
.progress span { display: block; width: 0; height: 100%; background: var(--coral); }
.site-header {
  position: sticky; top: 0; z-index: 80;
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; padding: 14px max(24px, calc((100vw - var(--max))/2));
  background: rgba(251, 250, 245, .88); border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}
.brand { display: flex; align-items: center; gap: 12px; line-height: 1.05; }
.brand-mark { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 50%; background: var(--forest); color: var(--lime); font-weight: 900; font-size: 13px; letter-spacing: .08em; }
.brand b { display: block; font-size: 15px; }
.brand small { display: block; color: var(--muted); font-size: 11px; margin-top: 4px; letter-spacing: .05em; }
nav { display: flex; align-items: center; gap: 27px; font-size: 13px; font-weight: 700; }
nav a { position: relative; white-space: nowrap; word-break: keep-all; }
nav a:not(.nav-cta)::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -5px; height: 2px; background: var(--coral); transition: right .25s ease; }
nav a:hover::after { right: 0; }
.nav-cta { padding: 9px 17px; border-radius: 999px; background: var(--forest); color: white; }
.menu-button { display: none; border: 1px solid var(--line); background: transparent; border-radius: 999px; padding: 8px 13px; }
.section-shell { width: min(var(--max), calc(100% - 48px)); margin: 0 auto; }
.section { padding: 120px 0; }
.hero { min-height: 760px; display: grid; grid-template-columns: 1.08fr .92fr; gap: 70px; align-items: center; padding-top: 70px; padding-bottom: 70px; }
.eyebrow { margin: 0 0 18px; color: #4f6e65; font-size: 12px; font-weight: 900; letter-spacing: .16em; }
.hero h1, .section-heading h2, .fit-copy h2, .contact h2 { margin: 0; font-size: clamp(44px, 6.1vw, 84px); line-height: .98; letter-spacing: -.055em; }
.hero h1 span { color: var(--forest-2); }
.hero-lede { max-width: 650px; margin: 30px 0; color: #3d4b47; font-size: 18px; line-height: 1.75; }
.hero-actions, .contact-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border-radius: 999px; border: 1px solid transparent; cursor: pointer; font-weight: 800; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--forest); color: white; box-shadow: 0 12px 28px rgba(16,42,37,.16); }
.button-secondary { border-color: var(--line); background: rgba(255,255,255,.55); }
.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 28px 0 0; padding: 0; list-style: none; }
.hero-tags li { padding: 6px 11px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: 12px; }
.hero-visual { position: relative; min-height: 520px; display: grid; place-items: center; overflow: hidden; border-radius: 38px; background: var(--forest); box-shadow: 0 30px 80px rgba(16,42,37,.2); }
.hero-visual::before { content: ""; position: absolute; inset: 0; background-image: radial-gradient(circle at 20% 20%, rgba(203,255,98,.18), transparent 28%), linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px); background-size: auto, 40px 40px, 40px 40px; }
.core { position: relative; z-index: 3; display: flex; flex-direction: column; align-items: center; justify-content: center; width: 190px; height: 190px; border-radius: 50%; background: var(--lime); color: var(--forest); box-shadow: 0 0 0 14px rgba(203,255,98,.08), 0 0 55px rgba(203,255,98,.24); }
.core span { font-size: 13px; font-weight: 900; letter-spacing: .18em; }
.core strong { font-size: 26px; line-height: 1.1; }
.core small { margin-top: 7px; font-size: 10px; }
.orbit { position: absolute; border: 1px solid rgba(255,255,255,.2); border-radius: 50%; }
.orbit-one { width: 330px; height: 330px; animation: spin 18s linear infinite; }
.orbit-two { width: 470px; height: 470px; border-style: dashed; animation: spin 28s linear infinite reverse; }
.satellite { position: absolute; z-index: 4; padding: 9px 14px; border-radius: 999px; background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.25); color: white; font-size: 12px; font-weight: 800; backdrop-filter: blur(7px); }
.s1 { left: 12%; top: 22%; }.s2 { right: 12%; top: 28%; }.s3 { left: 17%; bottom: 19%; }.s4 { right: 20%; bottom: 13%; }.s5 { right: 7%; top: 54%; color: var(--forest); background: var(--coral); border: 0; }
@keyframes spin { to { transform: rotate(360deg); } }
.signal-strip { display: grid; grid-template-columns: repeat(4, 1fr); background: var(--paper); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.signal-strip article { min-height: 165px; display: flex; align-items: flex-end; justify-content: space-between; gap: 18px; padding: 34px max(24px, calc((100vw - var(--max))/8)); border-right: 1px solid var(--line); }
.signal-strip article:last-child { border-right: 0; }
.signal-strip strong { font-size: clamp(27px, 3.1vw, 44px); letter-spacing: -.04em; color: var(--forest); }
.signal-strip span { color: var(--muted); font-size: 12px; line-height: 1.5; }
.section-heading { display: grid; grid-template-columns: .9fr 1.45fr .9fr; gap: 40px; align-items: start; margin-bottom: 58px; }
.section-heading .eyebrow { grid-column: 1; }
.section-heading h2 { grid-column: 1 / 3; font-size: clamp(38px, 5vw, 67px); }
.section-heading > p:last-child { grid-column: 3; grid-row: 2; margin: 0; color: var(--muted); }
.capability-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.capability-card { min-height: 330px; display: flex; flex-direction: column; padding: 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); transition: background .25s ease, transform .25s ease; }
.capability-card:hover { background: var(--paper); transform: translateY(-5px); }
.capability-card > span { color: var(--coral); font-size: 12px; font-weight: 900; }
.capability-card h3 { margin: auto 0 10px; font-size: 25px; letter-spacing: -.03em; }
.capability-card p { color: var(--muted); }
.capability-card em { color: #73807c; font-size: 11px; font-style: normal; letter-spacing: .05em; }
.dark-section { background: var(--forest); color: white; }
.section-heading.light .eyebrow { color: var(--lime); }
.section-heading.light > p:last-child { color: rgba(255,255,255,.6); }
.filter-row { display: flex; flex-wrap: wrap; gap: 9px; margin: -20px 0 35px; }
.filter { border: 1px solid rgba(255,255,255,.2); border-radius: 999px; padding: 8px 15px; background: transparent; color: rgba(255,255,255,.7); cursor: pointer; }
.filter.active, .filter:hover { background: var(--lime); color: var(--forest); border-color: var(--lime); }
.case-list { border-top: 1px solid rgba(255,255,255,.18); }
.case-card { display: grid; grid-template-columns: 70px 1fr 150px; gap: 28px; padding: 42px 0; border-bottom: 1px solid rgba(255,255,255,.18); }
.case-card.is-hidden { display: none; }
.case-index { color: var(--coral); font-size: 12px; font-weight: 900; }
.case-kicker { margin: 0 0 7px; color: var(--lime); font-size: 11px; font-weight: 800; letter-spacing: .08em; }
.case-main h3 { margin: 0 0 14px; font-size: clamp(26px, 3vw, 40px); line-height: 1.14; letter-spacing: -.035em; }
.case-main > p:last-of-type { max-width: 760px; margin: 0; color: rgba(255,255,255,.7); }
.case-metrics { display: flex; flex-wrap: wrap; gap: 12px 20px; margin-top: 22px; }
.case-metrics span { padding-right: 20px; border-right: 1px solid rgba(255,255,255,.18); font-size: 12px; color: rgba(255,255,255,.65); }
.case-metrics b { display: block; color: white; font-size: 17px; }
.case-side { display: flex; align-content: flex-start; flex-wrap: wrap; gap: 7px; }
.case-side span { height: fit-content; padding: 5px 9px; border-radius: 999px; background: rgba(255,255,255,.08); font-size: 10px; color: rgba(255,255,255,.68); }
.research-grid { display: grid; grid-template-columns: .82fr 1.18fr; gap: 90px; }
.research-grid .section-heading { display: block; margin: 0; }
.research-grid .section-heading h2 { font-size: clamp(40px, 5vw, 68px); }
.research-grid .section-heading > p:last-child { margin-top: 26px; max-width: 420px; }
.sticky { position: sticky; top: 120px; align-self: start; }
.research-item { display: grid; grid-template-columns: 45px 1fr; gap: 18px; padding: 25px 0; border-bottom: 1px solid var(--line); }
.research-item > span { color: var(--coral); font-weight: 900; font-size: 12px; }
.research-item h3 { margin: 0 0 8px; font-size: 21px; }
.research-item p { margin: 0; color: var(--muted); }
.publication-block { margin-top: 42px; padding: 30px; background: var(--paper); border-radius: 24px; }
.publication-heading { display: flex; align-items: end; justify-content: space-between; gap: 20px; border-bottom: 1px solid var(--line); padding-bottom: 16px; }
.publication-heading h3 { margin: 0; font-size: 27px; }
.publication-heading span { color: var(--muted); font-size: 11px; letter-spacing: .08em; }
.publication-block ol { padding-left: 20px; }
.publication-block li { padding: 10px 0; color: #43504c; font-size: 13px; }
.publication-note { margin: 15px 0 0; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.education { background: var(--paper); }
.timeline { border-top: 1px solid var(--line); }
.timeline-item { display: grid; grid-template-columns: 160px 20px 1fr; gap: 25px; padding: 32px 0; border-bottom: 1px solid var(--line); }
.year { font-size: 13px; font-weight: 900; color: var(--coral); }
.timeline-line { width: 10px; height: 10px; margin-top: 8px; border-radius: 50%; background: var(--forest); box-shadow: 0 0 0 6px rgba(16,42,37,.08); }
.timeline-item h3 { margin: 0; font-size: 24px; }
.timeline-item p { margin: 3px 0; font-weight: 700; }
.timeline-item small { color: var(--muted); }
.fit-section { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; }
.fit-copy h2 { font-size: clamp(42px, 5vw, 68px); }
.fit-grid { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.fit-grid article { min-height: 260px; padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.fit-grid span { color: var(--coral); font-size: 11px; font-weight: 900; }
.fit-grid h3 { margin: 65px 0 10px; font-size: 22px; line-height: 1.25; }
.fit-grid p { color: var(--muted); font-size: 14px; }
.contact { padding: 130px 0; background: var(--coral); color: #221d1a; }
.contact-inner { max-width: 980px; text-align: center; }
.contact .eyebrow { color: #5e2d25; }
.contact h2 { font-size: clamp(40px, 5vw, 62px); }
.nowrap { white-space: nowrap; word-break: keep-all; }
.contact-inner > p:not(.eyebrow):not(.contact-meta) { max-width: 720px; margin: 28px auto; font-size: 18px; }
.contact-actions { justify-content: center; }
.button-light { background: white; }
.button-outline-light { background: transparent; border-color: rgba(0,0,0,.35); }
.contact-meta { margin-top: 35px; font-size: 12px; opacity: .68; }
footer { display: flex; justify-content: space-between; padding: 28px max(24px, calc((100vw - var(--max))/2)); background: var(--forest); color: rgba(255,255,255,.68); font-size: 12px; }
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .65s ease, transform .65s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation: none !important; transition: none !important; } .reveal { opacity: 1; transform: none; } }
@media (max-width: 920px) {
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-visual { min-height: 480px; }
  .signal-strip { grid-template-columns: 1fr 1fr; }
  .signal-strip article:nth-child(2) { border-right: 0; }
  .signal-strip article { border-bottom: 1px solid var(--line); }
  .section-heading { grid-template-columns: 1fr; gap: 18px; }
  .section-heading .eyebrow, .section-heading h2, .section-heading > p:last-child { grid-column: 1; grid-row: auto; }
  .capability-grid { grid-template-columns: 1fr 1fr; }
  .research-grid, .fit-section { grid-template-columns: 1fr; }
  .sticky { position: static; }
}
@media (max-width: 680px) {
  .site-header { padding: 12px 18px; }
  .menu-button { display: block; }
  nav { display: none; position: absolute; top: 69px; left: 12px; right: 12px; flex-direction: column; align-items: stretch; gap: 0; padding: 12px; background: var(--cream); border: 1px solid var(--line); border-radius: 18px; box-shadow: 0 20px 50px rgba(16,42,37,.16); }
  nav.open { display: flex; }
  nav a { padding: 11px; }
  .section-shell { width: min(100% - 30px, var(--max)); }
  .section { padding: 82px 0; }
  .hero { gap: 38px; padding-top: 48px; }
  .hero h1 { font-size: 48px; }
  .hero-lede { font-size: 16px; }
  .hero-visual { min-height: 390px; border-radius: 26px; }
  .orbit-two { width: 370px; height: 370px; }.orbit-one { width: 270px; height: 270px; }
  .core { width: 155px; height: 155px; }.core strong { font-size: 22px; }
  .signal-strip article { min-height: 125px; padding: 22px 18px; }
  .signal-strip strong { font-size: 28px; }
  .capability-grid, .fit-grid { grid-template-columns: 1fr; }
  .capability-card { min-height: 270px; }
  .case-card { grid-template-columns: 36px 1fr; gap: 14px; }
  .case-side { grid-column: 2; }
  .case-metrics span { border-right: 0; }
  .timeline-item { grid-template-columns: 1fr; gap: 8px; }
  .timeline-line { display: none; }
  .contact { padding: 90px 0; }
  footer { padding: 24px 18px; }
}