:root {
  --ink: #103331;
  --ink-soft: #4b6866;
  --paper: #f4f7f1;
  --white: #ffffff;
  --mint: #a9e2c1;
  --mint-bright: #c7f3d7;
  --teal: #0a514c;
  --line: rgba(16, 51, 49, 0.13);
  --shadow: 0 28px 70px rgba(13, 61, 57, 0.15);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }

.site-header {
  width: min(1180px, calc(100% - 48px));
  min-height: 88px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 13px; }
.brand-mark { width: 38px; height: 42px; position: relative; display: inline-block; }
.brand-mark span { position: absolute; width: 16px; height: 27px; border: 3px solid var(--teal); border-radius: 999px; transform: rotate(32deg); }
.brand-mark span:nth-child(1) { left: 2px; top: 2px; }
.brand-mark span:nth-child(2) { right: 2px; top: 11px; border-color: #31a677; }
.brand-mark span:nth-child(3) { left: 2px; bottom: 0; height: 17px; border-color: #81cda3; }
.brand-copy { display: flex; flex-direction: column; line-height: 1.05; }
.brand-copy strong { font-family: Georgia, serif; letter-spacing: .12em; font-size: 19px; }
.brand-copy small { margin-top: 6px; color: var(--ink-soft); letter-spacing: .2em; font-size: 11px; }
nav { display: flex; align-items: center; gap: 30px; font-size: 14px; }
nav a { transition: opacity .2s ease; }
nav a:hover { opacity: .62; }
.nav-cta { border: 1px solid var(--ink); padding: 9px 17px; border-radius: 999px; }

main { overflow: hidden; }
.hero {
  width: min(1180px, calc(100% - 48px));
  min-height: 610px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.35fr .65fr;
  gap: 72px;
  align-items: center;
  position: relative;
}
.hero-copy { position: relative; z-index: 2; padding: 78px 0; }
.eyebrow, .section-label { margin: 0 0 16px; color: #268466; font-weight: 700; font-size: 12px; letter-spacing: .18em; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 24px; font-family: Georgia, "Songti SC", serif; font-size: clamp(42px, 5.5vw, 72px); line-height: 1.12; font-weight: 500; letter-spacing: -.035em; }
h1 em { color: #238563; font-style: normal; }
.hero-lead { max-width: 660px; color: var(--ink-soft); font-size: 18px; }
.hero-actions { margin-top: 34px; display: flex; align-items: center; gap: 26px; }
.primary-button { display: inline-block; padding: 13px 23px; background: var(--ink); color: white; border-radius: 999px; font-weight: 650; }
.text-link { font-weight: 650; border-bottom: 1px solid rgba(16, 51, 49, .4); }
.hero-orb { position: absolute; border-radius: 50%; filter: blur(2px); pointer-events: none; }
.orb-one { width: 430px; height: 430px; right: -140px; top: 40px; background: rgba(180, 231, 198, .5); }
.orb-two { width: 190px; height: 190px; left: 46%; bottom: -100px; background: rgba(201, 240, 215, .75); }
.science-card {
  min-height: 390px;
  position: relative;
  z-index: 2;
  border-radius: 34px;
  background: linear-gradient(155deg, #0a4d48 0%, #103936 70%);
  box-shadow: var(--shadow);
  overflow: hidden;
  color: var(--white);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 34px;
}
.science-card::before { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 75% 15%, rgba(196, 246, 216, .36), transparent 34%); }
.science-card p { position: relative; margin: 0; color: rgba(255,255,255,.7); font-size: 16px; line-height: 1.35; }
.science-card strong { color: white; font-family: Georgia, serif; font-size: 34px; font-weight: 500; }
.molecule { position: absolute; inset: 0; }
.node { position: absolute; width: 20px; height: 20px; border-radius: 50%; background: var(--mint-bright); box-shadow: 0 0 0 9px rgba(199, 243, 215, .12); }
.n1 { left: 22%; top: 24%; }.n2 { left: 55%; top: 14%; }.n3 { right: 17%; top: 38%; }
.n4 { left: 39%; top: 52%; }.n5 { right: 25%; bottom: 23%; }.n6 { left: 18%; bottom: 20%; }
.bond { position: absolute; height: 2px; background: rgba(199,243,215,.55); transform-origin: left center; }
.b1 { width: 130px; left: 25%; top: 27%; transform: rotate(-16deg); }.b2 { width: 112px; left: 58%; top: 18%; transform: rotate(44deg); }
.b3 { width: 105px; left: 43%; top: 53%; transform: rotate(-28deg); }.b4 { width: 97px; left: 42%; top: 56%; transform: rotate(32deg); }
.b5 { width: 110px; left: 20%; bottom: 24%; transform: rotate(-31deg); }.b6 { width: 107px; right: 20%; top: 42%; transform: rotate(72deg); }

.status-strip {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto 96px;
  padding: 18px 22px;
  display: grid;
  grid-template-columns: auto auto 1fr auto;
  gap: 13px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255,255,255,.55);
  font-size: 14px;
}
.status-dot { width: 10px; height: 10px; border-radius: 50%; background: #32a56f; box-shadow: 0 0 0 5px rgba(50,165,111,.13); }
.status-strip span:not(.status-dot), .status-strip time { color: var(--ink-soft); }

.section { width: min(1180px, calc(100% - 48px)); margin: 0 auto; padding: 92px 0; border-top: 1px solid var(--line); }
.about { display: grid; grid-template-columns: .9fr 1.1fr; gap: 90px; }
h2 { margin-bottom: 18px; font-family: Georgia, "Songti SC", serif; font-size: clamp(32px, 4vw, 48px); line-height: 1.2; font-weight: 500; }
.about > p { font-size: 19px; color: var(--ink-soft); max-width: 620px; }
.section-heading { max-width: 650px; margin-bottom: 44px; }
.section-heading > p:last-child { color: var(--ink-soft); }
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.service-grid article { min-height: 270px; padding: 28px; border: 1px solid var(--line); border-radius: 22px; background: rgba(255,255,255,.58); transition: transform .2s ease, box-shadow .2s ease; }
.service-grid article:hover { transform: translateY(-4px); box-shadow: 0 18px 40px rgba(17,65,60,.08); }
.service-grid article > span { display: inline-block; margin-bottom: 60px; color: #268466; font: 600 13px/1 Georgia, serif; }
.service-grid h3 { font-size: 22px; }
.service-grid p { color: var(--ink-soft); }
.contact { display: grid; grid-template-columns: .75fr 1.25fr; gap: 70px; align-items: center; }
.contact-card { border-radius: 24px; background: var(--ink); color: white; padding: 34px 38px; }
.contact-card p { font-size: 18px; }
.contact-card small { color: rgba(255,255,255,.63); }

footer { width: min(1180px, calc(100% - 48px)); margin: 0 auto; padding: 38px 0 56px; border-top: 1px solid var(--line); display: grid; grid-template-columns: 1fr auto; gap: 10px 30px; color: var(--ink-soft); font-size: 13px; }
.footer-brand { color: var(--ink); font-family: Georgia, serif; font-weight: 700; letter-spacing: .08em; }
.footer-brand span { margin-left: 12px; font-family: inherit; font-weight: 400; letter-spacing: 0; }
footer p { margin: 0; }
footer p:nth-child(2) { text-align: right; }

@media (max-width: 820px) {
  .site-header { width: min(100% - 32px, 1180px); }
  nav a:not(.nav-cta) { display: none; }
  .hero { width: min(100% - 32px, 1180px); grid-template-columns: 1fr; gap: 0; padding-bottom: 48px; }
  .hero-copy { padding: 64px 0 30px; }
  .science-card { min-height: 300px; }
  .status-strip { width: min(100% - 32px, 1180px); grid-template-columns: auto 1fr; margin-bottom: 58px; }
  .status-strip > span:nth-of-type(2), .status-strip time { grid-column: 2; }
  .section { width: min(100% - 32px, 1180px); padding: 66px 0; }
  .about, .contact { grid-template-columns: 1fr; gap: 24px; }
  .service-grid { grid-template-columns: 1fr; }
  .service-grid article { min-height: 210px; }
  .service-grid article > span { margin-bottom: 32px; }
  footer { width: min(100% - 32px, 1180px); grid-template-columns: 1fr; }
  footer p:nth-child(2) { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}