:root {
  color-scheme: light;
  --ink: #17211e;
  --muted: #5d6864;
  --green: #176b57;
  --green-dark: #0e4e40;
  --mint: #dcefe6;
  --coral: #f5975f;
  --gold: #f4c47f;
  --paper: #ffffff;
  --soft: #f5f7f5;
  --line: #d8dfdc;
  --max: 1120px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
  letter-spacing: 0;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.site-header {
  width: min(calc(100% - 40px), var(--max));
  min-height: 76px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-grid;
  grid-template-columns: 40px auto;
  grid-template-rows: 22px 16px;
  align-items: center;
  column-gap: 11px;
  color: var(--ink);
  text-decoration: none;
}

.brand img {
  grid-row: 1 / 3;
  border-radius: 8px;
}

.brand span { font-weight: 760; }
.brand small { color: var(--muted); font-size: 11px; }

nav { display: flex; gap: 24px; }
nav a { color: var(--muted); text-decoration: none; font-size: 14px; }
nav a:hover, nav a[aria-current="page"] { color: var(--green); }

.hero {
  position: relative;
  min-height: min(660px, calc(100vh - 150px));
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--mint);
  border-top: 1px solid #cce2d7;
  border-bottom: 1px solid #cce2d7;
}

.hero-visual {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  pointer-events: none;
}

.hero-visual img {
  width: min(680px, 55vw);
  height: auto;
  transform: translateX(5%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(calc(100% - 40px), var(--max));
  margin: auto;
  padding: 88px 0 64px;
  align-self: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--green);
  font-size: 13px;
  font-weight: 750;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }

.hero h1 {
  max-width: 600px;
  margin-bottom: 16px;
  font-size: clamp(64px, 10vw, 124px);
  line-height: .92;
  font-weight: 820;
}

.hero-copy {
  max-width: 510px;
  margin-bottom: 32px;
  font-size: 21px;
  line-height: 1.65;
}

.availability {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  color: var(--green-dark);
  background: rgba(255, 255, 255, .68);
  border: 1px solid rgba(23, 107, 87, .2);
  border-radius: 6px;
  font-size: 14px;
}

.platform-mark { color: var(--coral); font-size: 13px; }

.principles {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
  padding: 104px 0;
}

.section-heading { max-width: 720px; margin-bottom: 52px; }
.section-heading h2, .account-band h2, .policy-header h1 {
  margin-bottom: 0;
  font-size: 40px;
  line-height: 1.24;
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
}

.principle-grid article {
  min-height: 240px;
  padding: 28px 32px 24px 0;
  border-bottom: 1px solid var(--line);
}

.principle-grid article + article { padding-left: 32px; border-left: 1px solid var(--line); }
.principle-grid h3 { margin-bottom: 12px; font-size: 20px; }
.principle-grid p { margin-bottom: 0; color: var(--muted); }
.number { display: block; margin-bottom: 48px; color: var(--coral); font-weight: 800; }

.account-band {
  display: grid;
  grid-template-columns: 1fr 1.1fr auto;
  align-items: end;
  gap: 56px;
  padding: 76px max(20px, calc((100% - var(--max)) / 2));
  color: #fff;
  background: var(--green-dark);
}

.account-band .eyebrow { color: var(--gold); }
.account-band p { margin-bottom: 0; color: #dce9e4; }
.text-link { color: #fff; white-space: nowrap; font-weight: 700; }

footer {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
  padding: 52px 0 32px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
}

footer p { margin: 4px 0 0; color: var(--muted); }
.footer-links { display: flex; gap: 24px; font-size: 14px; }
.copyright { grid-column: 1 / -1; padding-top: 28px; border-top: 1px solid var(--line); font-size: 13px; }

.policy-layout {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 220px minmax(0, 760px);
  justify-content: space-between;
  gap: 80px;
  padding: 88px 0 112px;
}

.policy-header { grid-column: 1 / -1; max-width: 800px; padding-bottom: 36px; border-bottom: 1px solid var(--line); }
.policy-header h1 { margin-bottom: 18px; font-size: 48px; }
.policy-header > p:last-child { max-width: 620px; margin-bottom: 0; color: var(--muted); }

.policy-nav {
  position: sticky;
  top: 28px;
  align-self: start;
  display: grid;
  gap: 8px;
}

.policy-nav a {
  padding: 5px 0;
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}

.policy-nav a:hover { color: var(--green); }

.policy-content section { scroll-margin-top: 28px; padding: 0 0 34px; }
.policy-content h2 { margin-bottom: 14px; font-size: 23px; }
.policy-content p, .policy-content li { color: #3e4a46; }
.policy-content ul { margin: 0 0 16px; padding-left: 24px; }
.policy-content li + li { margin-top: 10px; }
.policy-content a { color: var(--green); }

@media (max-width: 820px) {
  .hero { min-height: 540px; align-items: flex-start; }
  .hero-content { width: calc(100% - 40px); padding: 64px 0 20px; align-self: start; }
  .hero-visual { align-items: end; opacity: .52; }
  .hero-visual img { width: min(520px, 92vw); transform: translate(25%, 26%); }
  .hero h1 { font-size: 72px; }
  .hero-copy { max-width: 480px; font-size: 18px; }
  .principle-grid { grid-template-columns: 1fr; }
  .principle-grid article { min-height: auto; padding: 24px 0; }
  .principle-grid article + article { padding-left: 0; border-left: 0; }
  .number { margin-bottom: 22px; }
  .account-band { grid-template-columns: 1fr; align-items: start; gap: 28px; }
  .policy-layout { grid-template-columns: 1fr; gap: 38px; padding-top: 64px; }
  .policy-nav { position: static; grid-template-columns: repeat(2, 1fr); padding-bottom: 24px; border-bottom: 1px solid var(--line); }
}

@media (max-width: 560px) {
  .site-header { width: calc(100% - 28px); min-height: 68px; }
  .site-header nav { gap: 14px; }
  .site-header nav a:first-child { display: none; }
  .hero-content { width: calc(100% - 28px); padding-top: 48px; }
  .hero h1 { font-size: 64px; }
  .principles, footer, .policy-layout { width: calc(100% - 28px); }
  .principles { padding: 76px 0; }
  .section-heading h2, .account-band h2 { font-size: 32px; }
  .account-band { padding: 60px 20px; }
  footer { grid-template-columns: 1fr; }
  .copyright { grid-column: 1; }
  .policy-header h1 { font-size: 38px; }
  .policy-nav { grid-template-columns: 1fr 1fr; gap: 4px 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}