:root {
  color-scheme: light;
  --ink: #0d1f2a;
  --ink-soft: #38505c;
  --teal: #0b8390;
  --teal-strong: #086873;
  --cyan: #8fe6f7;
  --cyan-soft: #dff7fa;
  --amber: #ffc25a;
  --surface: #f6f8fa;
  --white: #ffffff;
  --line: rgba(13, 31, 42, 0.16);
  --line-strong: rgba(13, 31, 42, 0.28);
  --focus: #006f7a;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { color: inherit; }

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--white);
  text-decoration: none;
  transform: translateY(-180%);
}

.skip-link:focus { transform: translateY(0); }

.shell {
  width: min(1160px, calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(13, 31, 42, 0.1);
  background: rgba(246, 248, 250, 0.94);
  backdrop-filter: blur(14px);
}

.nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.brand img {
  width: 192px;
  height: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--ink-soft);
  font-size: 14px;
}

.nav-links a {
  padding: 8px 0;
  text-decoration: none;
}

.nav-links a:hover { color: var(--teal-strong); }

.hero-wrap {
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 85% 10%, rgba(143, 230, 247, 0.38), transparent 24rem),
    linear-gradient(135deg, #f6f8fa 0%, #eef7f8 100%);
}

.hero {
  min-height: 680px;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(340px, 0.85fr);
  align-items: center;
  gap: clamp(48px, 7vw, 96px);
  padding: clamp(76px, 9vw, 118px) 0 clamp(70px, 8vw, 104px);
}

.kicker {
  margin: 0 0 20px;
  color: var(--teal-strong);
  font-size: 13px;
  font-weight: 760;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.kicker.light { color: var(--cyan); }

h1,
h2,
h3 {
  text-wrap: balance;
}

h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(44px, 6.6vw, 78px);
  line-height: 1.07;
  letter-spacing: -0.038em;
}

.hero-lead {
  max-width: 650px;
  margin: 28px 0 0;
  color: var(--ink-soft);
  font-size: clamp(18px, 2vw, 21px);
  line-height: 1.8;
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 21px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  background: var(--ink);
  color: var(--white);
  font-size: 14px;
  font-weight: 720;
  text-decoration: none;
  transition: transform 160ms ease-out, background-color 160ms ease-out;
}

.button:hover {
  background: var(--teal-strong);
  transform: translateY(-2px);
}

.button.secondary {
  border-color: var(--line-strong);
  background: transparent;
  color: var(--ink);
}

.button.secondary:hover {
  border-color: var(--ink);
  background: rgba(255, 255, 255, 0.6);
}

.hero-identity {
  position: relative;
  margin: 0;
  padding: 28px 28px 22px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.76);
}

.hero-identity::after {
  content: "";
  position: absolute;
  right: -18px;
  bottom: -18px;
  width: 72px;
  height: 4px;
  background: var(--amber);
}

.hero-identity img {
  width: 100%;
  aspect-ratio: 5 / 6;
  object-fit: contain;
}

.hero-identity figcaption {
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.55;
}

.hero-identity figcaption span { color: var(--teal-strong); }

.section { padding: clamp(84px, 10vw, 132px) 0; }

.section-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 48px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.section-title h2,
.legal h1 {
  margin: 0;
  font-size: clamp(34px, 4.7vw, 56px);
  line-height: 1.12;
  letter-spacing: -0.035em;
}

.section-title > p {
  margin: 0;
  color: var(--teal-strong);
  font-size: 14px;
  font-weight: 700;
}

.about {
  display: grid;
  grid-template-columns: 0.76fr 1.24fr;
  gap: clamp(46px, 8vw, 100px);
  align-items: start;
}

.about .section-title {
  display: block;
  margin: 0;
  padding: 0;
  border: 0;
}

.about .section-title p { margin-top: 18px; }

.about-copy p {
  max-width: 68ch;
  margin: 0 0 24px;
  color: var(--ink-soft);
  font-size: 19px;
  line-height: 1.9;
  text-wrap: pretty;
}

.about-copy p:first-child {
  color: var(--ink);
  font-size: clamp(22px, 2.5vw, 29px);
  line-height: 1.68;
}

.focus-section {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.focus-list article {
  display: grid;
  grid-template-columns: minmax(240px, 0.8fr) minmax(0, 1.2fr);
  gap: 44px;
  padding: 38px 0;
  border-top: 1px solid var(--line);
}

.focus-list article:first-child { border-top: 0; }

.focus-name {
  display: flex;
  align-items: center;
  gap: 16px;
}

.focus-name span {
  color: var(--amber);
  font-size: 14px;
}

.focus-name h3 {
  margin: 0;
  font-size: clamp(24px, 3vw, 35px);
}

.focus-list article > p {
  max-width: 62ch;
  margin: 0;
  color: var(--ink-soft);
  font-size: 17px;
  line-height: 1.85;
}

.principles {
  display: grid;
  grid-template-columns: 1.04fr 0.96fr;
  gap: clamp(44px, 7vw, 84px);
  padding: clamp(44px, 7vw, 76px);
  border-radius: 14px;
  color: var(--white);
  background: var(--ink);
}

.principles h2 {
  max-width: 650px;
  margin: 0;
  font-size: clamp(36px, 4.8vw, 58px);
  line-height: 1.16;
  letter-spacing: -0.035em;
}

.principle-list > div {
  padding: 22px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.principle-list > div:first-child { border-top: 0; }
.principle-list strong { display: block; margin-bottom: 8px; font-size: 18px; }
.principle-list p { margin: 0; color: rgba(255, 255, 255, 0.78); line-height: 1.75; }

.identity-layout {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: clamp(44px, 8vw, 96px);
  align-items: start;
}

.identity-intro {
  margin: 0;
  color: var(--ink-soft);
  font-size: 17px;
  line-height: 1.85;
}

.facts { margin: 0; }

.facts > div {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 28px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.facts > div:first-child { border-top-color: var(--line-strong); }
.facts dt { color: var(--ink-soft); font-size: 14px; }
.facts dd { margin: 0; font-size: 17px; line-height: 1.6; overflow-wrap: anywhere; }
.facts a { color: var(--teal-strong); text-underline-offset: 4px; }

.contact-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 44px;
  margin-bottom: clamp(84px, 9vw, 120px);
  padding: clamp(36px, 6vw, 58px);
  border-top: 4px solid var(--amber);
  background: var(--cyan-soft);
}

.contact-band h2 {
  margin: 0;
  font-size: clamp(28px, 3.8vw, 44px);
  letter-spacing: -0.03em;
}

.contact-band p {
  max-width: 65ch;
  margin: 14px 0 0;
  color: var(--ink-soft);
  line-height: 1.75;
}

.site-footer {
  padding: 38px 0 48px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 13px;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
}

.footer-grid strong,
.footer-grid span { display: block; }
.footer-grid strong { margin-bottom: 8px; color: var(--ink); }
.footer-links { display: flex; flex-wrap: wrap; gap: 20px; }
.footer-links a { text-decoration: none; }
.footer-links a:hover { color: var(--teal-strong); }

.legal {
  width: min(860px, calc(100% - 48px));
  margin: 0 auto;
  padding: clamp(70px, 9vw, 108px) 0 120px;
}

.legal-logo {
  width: min(260px, 70vw);
  margin-bottom: 54px;
}

.legal .updated {
  margin: 18px 0 48px;
  color: var(--ink-soft);
}

.legal h2 {
  margin: 42px 0 14px;
  font-size: 24px;
}

.legal p,
.legal li,
.legal dd {
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.85;
}

.legal a { color: var(--teal-strong); text-underline-offset: 4px; }
.legal-back { display: inline-block; margin-bottom: 42px; text-decoration: none; }

.contact-details {
  margin: 38px 0;
  padding: 28px 0;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line);
}

.contact-details > div {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 24px;
  padding: 12px 0;
}

.contact-details dt { color: var(--ink-soft); }
.contact-details dd { margin: 0; color: var(--ink); overflow-wrap: anywhere; }

@media (max-width: 860px) {
  .shell { width: min(100% - 32px, 1160px); }
  .nav { min-height: 68px; }
  .brand img { width: 152px; }
  .nav-links a:not(:last-child) { display: none; }
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-identity { width: min(520px, 100%); justify-self: center; }
  .about,
  .principles,
  .identity-layout { grid-template-columns: 1fr; }
  .focus-list article { grid-template-columns: 1fr; gap: 18px; }
  .section-title { align-items: flex-start; flex-direction: column; gap: 12px; }
  .contact-band { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 560px) {
  .nav-links { gap: 12px; }
  .nav-links a { font-size: 13px; }
  .hero { padding-top: 62px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .hero-actions .button { width: 100%; }
  .hero-identity { padding: 18px; }
  .principles { padding: 34px 24px; }
  .facts > div,
  .contact-details > div { grid-template-columns: 1fr; gap: 7px; }
  .contact-band { padding: 32px 24px; }
  .footer-grid { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}