:root {
  color-scheme: light;
  --ink: #183b39;
  --ink-soft: #4b6765;
  --teal: #248f87;
  --teal-deep: #176d67;
  --mint: #d9f0ed;
  --paper: #fbfaf5;
  --paper-deep: #f3eee3;
  --amber: #c99143;
  --line: rgba(24, 59, 57, 0.14);
  --shadow: 0 24px 80px rgba(24, 59, 57, 0.09);
  --radius: 28px;
  --content: min(1120px, calc(100vw - 40px));
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 86% 3%, rgba(46, 169, 159, 0.13), transparent 32rem),
    radial-gradient(circle at 3% 44%, rgba(201, 145, 67, 0.09), transparent 28rem),
    var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.72;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }
a:focus-visible, button:focus-visible {
  outline: 3px solid rgba(36, 143, 135, 0.42);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 99;
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--ink);
  color: white;
  transition: top 160ms ease;
}
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(24, 59, 57, 0.08);
  background: rgba(251, 250, 245, 0.88);
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
}

.nav {
  width: var(--content);
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  letter-spacing: 0.16em;
  font-size: 13px;
  font-weight: 650;
}
.brand img { width: 38px; height: 38px; }
.brand small {
  display: block;
  margin-top: -3px;
  color: var(--ink-soft);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.14em;
}

.nav-links { display: flex; align-items: center; gap: 24px; }
.nav-links a {
  color: var(--ink-soft);
  font-size: 14px;
  text-decoration: none;
}
.nav-links a:hover { color: var(--teal-deep); }

.button,
.button-secondary {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 650;
  line-height: 1.2;
}
.button { background: var(--ink); color: #fff; }
.button:hover { background: var(--teal-deep); }
.button-secondary { border-color: var(--line); background: rgba(255,255,255,.55); }
.button-secondary:hover { border-color: rgba(36,143,135,.42); }

.hero {
  width: var(--content);
  min-height: min(780px, calc(100svh - 72px));
  margin: 0 auto;
  padding: 96px 0 76px;
  display: grid;
  grid-template-columns: 1.12fr .88fr;
  align-items: center;
  gap: clamp(48px, 8vw, 112px);
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--teal-deep);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
}

h1, h2, h3 { margin-top: 0; text-wrap: balance; }
h1, h2 {
  font-family: "Songti SC", "STSong", Georgia, serif;
  font-weight: 400;
  letter-spacing: -.035em;
}
h1 { margin-bottom: 24px; font-size: clamp(48px, 7.1vw, 92px); line-height: 1.03; }
h2 { margin-bottom: 18px; font-size: clamp(34px, 4.4vw, 58px); line-height: 1.12; }
h3 { margin-bottom: 8px; font-size: 18px; line-height: 1.4; }

.hero-copy { max-width: 660px; color: var(--ink-soft); font-size: clamp(18px, 2vw, 22px); }
.hero-actions { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 12px; }
.fine-print { margin-top: 18px; color: var(--ink-soft); font-size: 12px; }

.phone-stage {
  min-height: 540px;
  display: grid;
  place-items: center;
  position: relative;
}
.phone-stage::before {
  content: "";
  position: absolute;
  width: min(430px, 80vw);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46,169,159,.24), rgba(46,169,159,.04) 62%, transparent 63%);
}
.phone {
  position: relative;
  width: min(310px, 74vw);
  aspect-ratio: 9 / 18.8;
  padding: 12px;
  border: 1px solid rgba(255,255,255,.7);
  border-radius: 48px;
  background: #183b39;
  box-shadow: 0 42px 90px rgba(24,59,57,.24);
  transform: rotate(2.5deg);
}
.phone-screen {
  height: 100%;
  overflow: hidden;
  padding: 26px 22px;
  border-radius: 38px;
  background: linear-gradient(165deg, #fffef9, #f2eee4 74%);
}
.phone-status { display: flex; justify-content: space-between; font-size: 10px; font-weight: 700; }
.phone-kicker { margin: 62px 0 4px; color: var(--teal); font-size: 10px; letter-spacing: .18em; }
.phone-title { font-family: "Songti SC", serif; font-size: 34px; line-height: 1.1; }
.phone-card {
  margin-top: 24px;
  padding: 20px;
  border: 1px solid rgba(24,59,57,.08);
  border-radius: 24px;
  background: rgba(255,255,255,.82);
  box-shadow: 0 16px 44px rgba(24,59,57,.09);
}
.phone-card strong { display: block; font-family: "Songti SC", serif; font-size: 22px; font-weight: 400; }
.phone-card span { display: block; margin-top: 5px; color: var(--ink-soft); font-size: 11px; }
.progress { height: 6px; margin-top: 18px; overflow: hidden; border-radius: 999px; background: var(--mint); }
.progress::after { content: ""; display: block; width: 64%; height: 100%; border-radius: inherit; background: var(--teal); }
.phone-tabs { position: absolute; left: 30px; right: 30px; bottom: 34px; display: flex; justify-content: space-between; color: var(--ink-soft); font-size: 10px; }

.section { width: var(--content); margin: 0 auto; padding: 110px 0; }
.section-intro { max-width: 720px; margin-bottom: 44px; color: var(--ink-soft); font-size: 18px; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
  min-height: 250px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,.62);
  box-shadow: 0 8px 30px rgba(24,59,57,.035);
}
.card-number { color: var(--amber); font-family: ui-monospace, "SFMono-Regular", monospace; font-size: 12px; letter-spacing: .12em; }
.card h3 { margin-top: 54px; font-family: "Songti SC", serif; font-size: 25px; font-weight: 400; }
.card p { margin-bottom: 0; color: var(--ink-soft); font-size: 14px; }

.split {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: clamp(42px, 8vw, 108px);
  align-items: start;
}
.principles { display: grid; gap: 14px; }
.principle {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 16px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}
.principle:last-child { border-bottom: 1px solid var(--line); }
.principle-mark { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; background: var(--mint); color: var(--teal-deep); font-size: 13px; font-weight: 700; }
.principle p { margin: 4px 0 0; color: var(--ink-soft); font-size: 14px; }

.carrier-panel {
  padding: clamp(34px, 6vw, 72px);
  border-radius: 44px;
  color: #e7f4f2;
  background: linear-gradient(145deg, #183b39, #0f2d2c);
  box-shadow: var(--shadow);
}
.carrier-panel .eyebrow { color: #74d4ca; }
.carrier-panel p { color: rgba(231,244,242,.72); }
.carrier-grid { margin-top: 38px; display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.carrier {
  padding: 24px;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 24px;
  background: rgba(255,255,255,.045);
}
.carrier strong { display: block; margin-bottom: 8px; color: #fff; font-size: 17px; }
.carrier span { color: rgba(231,244,242,.68); font-size: 13px; }

.hq-hero { grid-template-columns: 1fr 1fr; }
.hq-stage {
  min-height: 520px;
  display: grid;
  place-items: center;
  position: relative;
}
.hq-stage::before {
  content: "";
  position: absolute;
  width: min(480px, 86vw);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46,169,159,.22), rgba(46,169,159,.05) 61%, transparent 62%);
}
.hq-board {
  position: relative;
  width: min(480px, 88vw);
  overflow: hidden;
  border: 1px solid rgba(24,59,57,.12);
  border-radius: 32px;
  background: rgba(255,255,255,.88);
  box-shadow: 0 34px 90px rgba(24,59,57,.17);
  transform: rotate(-1.2deg);
}
.hq-board-head,
.hq-board-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.hq-board-head {
  padding: 20px 24px;
  border-bottom: 1px solid var(--line);
}
.hq-board-brand { display: flex; align-items: center; gap: 10px; font-size: 13px; font-weight: 700; }
.hq-board-brand img { width: 30px; height: 30px; }
.hq-board-status { color: var(--teal-deep); font-size: 11px; font-weight: 700; letter-spacing: .08em; }
.hq-board-body { padding: 34px 34px 28px; }
.hq-board-body > p { margin: 0 0 3px; color: var(--teal-deep); font-size: 12px; letter-spacing: .14em; }
.hq-board-body > strong { display: block; margin-bottom: 28px; font-family: "Songti SC", serif; font-size: 29px; font-weight: 400; }
.hq-access-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 15px 0;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 14px;
}
.hq-access-row i { color: var(--teal-deep); font-size: 12px; font-style: normal; }
.hq-board-foot { padding: 14px 24px; color: rgba(231,244,242,.72); background: var(--ink); font-size: 10px; letter-spacing: .14em; }

.access-steps { margin: 0; padding: 0; list-style: none; }
.access-steps li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}
.access-steps li:last-child { border-bottom: 1px solid var(--line); }
.access-steps li > span {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--teal-deep);
  background: var(--mint);
  font-size: 13px;
  font-weight: 700;
}
.access-steps strong { display: block; font-size: 16px; }
.access-steps p { margin: 3px 0 0; color: var(--ink-soft); font-size: 14px; }

.hq-status-panel {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: clamp(36px, 7vw, 84px);
  align-items: start;
}
.hq-facts { margin: 0; }
.hq-facts div { padding: 15px 0; border-top: 1px solid rgba(255,255,255,.13); }
.hq-facts div:last-child { border-bottom: 1px solid rgba(255,255,255,.13); }
.hq-facts dt { color: rgba(231,244,242,.56); font-size: 11px; letter-spacing: .08em; }
.hq-facts dd { margin: 3px 0 0; color: #fff; font-size: 15px; }

.hq-security {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: clamp(42px, 8vw, 108px);
  align-items: start;
}
.hq-security-copy p { margin-top: 0; color: var(--ink-soft); }

.legal-shell { width: min(820px, calc(100vw - 40px)); margin: 0 auto; padding: 84px 0 120px; }
.legal-shell h1 { font-size: clamp(42px, 7vw, 70px); }
.legal-meta { margin: -8px 0 48px; color: var(--ink-soft); font-size: 13px; }
.legal-shell h2 { margin: 52px 0 14px; font-family: inherit; font-size: 22px; font-weight: 700; letter-spacing: 0; }
.legal-shell h3 { margin-top: 28px; }
.legal-shell p, .legal-shell li { color: #385654; }
.legal-shell li + li { margin-top: 8px; }
.notice {
  margin: 26px 0;
  padding: 20px 22px;
  border-left: 3px solid var(--teal);
  border-radius: 0 18px 18px 0;
  background: var(--mint);
}

.link-page {
  width: min(680px, calc(100vw - 40px));
  min-height: 100svh;
  margin: 0 auto;
  display: grid;
  place-items: center;
  text-align: center;
}
.link-card { padding: 52px 34px; }
.link-card img { width: 100px; }
.link-card h1 { margin-top: 24px; font-size: clamp(38px, 8vw, 62px); }
.link-card p { max-width: 520px; margin: 0 auto 28px; color: var(--ink-soft); }

.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(243,238,227,.62);
}
.footer-inner {
  width: var(--content);
  margin: 0 auto;
  padding: 52px 0;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  align-items: end;
}
.footer-copy { max-width: 580px; color: var(--ink-soft); font-size: 13px; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 18px; font-size: 13px; }
.footer-links a { color: var(--ink-soft); }
.footer-registration {
  width: var(--content);
  margin: 0 auto;
  padding: 0 0 30px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 18px;
  color: var(--ink-soft);
  font-size: 12px;
  text-align: center;
}
.footer-registration a { text-underline-offset: 3px; }
.footer-registration a:hover { color: var(--teal-deep); }

@media (max-width: 820px) {
  .nav-links a:not(.button) { display: none; }
  .hero { grid-template-columns: 1fr; padding-top: 66px; text-align: center; }
  .hero-copy { margin-inline: auto; }
  .hero-actions { justify-content: center; }
  .phone-stage { min-height: 500px; }
  .grid-3, .split, .hq-status-panel, .hq-security { grid-template-columns: 1fr; }
  .hq-hero { grid-template-columns: 1fr; }
  .hq-stage { min-height: 440px; }
  .card { min-height: 210px; }
  .card h3 { margin-top: 30px; }
  .section { padding: 80px 0; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-links { justify-content: flex-start; }
}

@media (max-width: 520px) {
  :root { --content: min(100% - 28px, 1120px); }
  .nav { min-height: 64px; }
  .brand span { display: none; }
  .nav-links .button { min-height: 42px; padding-inline: 17px; font-size: 13px; }
  .hero { min-height: auto; padding: 58px 0 50px; }
  h1 { font-size: 47px; }
  .carrier-grid { grid-template-columns: 1fr; }
  .hq-stage { min-height: 380px; }
  .hq-board-body { padding: 28px 24px 22px; }
  .hq-board-body > strong { font-size: 25px; }
  .legal-shell { width: min(100% - 30px, 820px); padding-top: 58px; }
}

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