:root {
  --bg: #f2f8f6;
  --surface: #ffffff;
  --ink: #16211f;
  --text: #30413d;
  --muted: #687773;
  --primary: #0f9a86;
  --primary-light: #daf0ea;
  --line: #cfe1db;
  --yellow: #f7c45d;
  --serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --content: 1160px;
  --page: clamp(20px, 5vw, 72px);
  color-scheme: light;
  font-family: var(--sans);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  min-width: 320px;
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: "";
  pointer-events: none;
  background:
    radial-gradient(circle at 90% 4%, rgb(15 154 134 / 15%), transparent 22rem),
    radial-gradient(circle at 6% 94%, rgb(247 196 93 / 18%), transparent 20rem);
}

a { color: inherit; }

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

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 10;
  padding: 10px 15px;
  color: #fff;
  background: var(--ink);
  border-radius: 999px;
  transform: translateY(-180%);
}

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

.site-header,
main,
footer {
  width: min(calc(100% - (var(--page) * 2)), var(--content));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 82px;
}

.brand {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: .02em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  color: #fff;
  font-family: var(--sans);
  font-size: 17px;
  font-weight: 900;
  background: var(--primary);
  border-radius: 11px;
  box-shadow: 0 6px 16px rgb(15 154 134 / 25%);
  place-items: center;
}

.home-link {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.home-link:hover { color: var(--primary); }

.intro {
  max-width: 920px;
  padding: clamp(64px, 11vw, 138px) 0 clamp(60px, 9vw, 108px);
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--primary);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .13em;
}

h1, h2, h3 {
  margin: 0;
  color: var(--ink);
  font-family: var(--serif);
  letter-spacing: -.035em;
}

h1 {
  font-size: clamp(42px, 6.1vw, 82px);
  line-height: 1.17;
}

h1 em {
  color: var(--primary);
  font-style: normal;
}

.intro-copy {
  max-width: 660px;
  margin: 30px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 20px);
}

.choices { padding-bottom: clamp(72px, 10vw, 128px); }

.section-heading { margin-bottom: 28px; }

.section-heading h2,
.future h2 { font-size: clamp(31px, 4vw, 52px); line-height: 1.25; }

.choice-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.choice-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 500px;
  padding: clamp(28px, 4vw, 48px);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 28px;
}

.choice-card-primary { background: var(--surface); }

.choice-card-dark {
  color: #dcebe6;
  background: #183f38;
  border-color: #183f38;
}

.choice-card-dark h3 { color: #fff; }

.choice-card-dark .card-kicker { color: #79d8c5; }

.choice-card-dark::after {
  position: absolute;
  right: -100px;
  bottom: -126px;
  width: 320px;
  height: 320px;
  content: "";
  border: 1px solid rgb(121 216 197 / 30%);
  border-radius: 50%;
  box-shadow: 0 0 0 42px rgb(121 216 197 / 6%), 0 0 0 84px rgb(121 216 197 / 4%);
}

.card-number {
  margin-bottom: 70px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .12em;
}

.choice-card-dark .card-number { color: var(--yellow); }

.card-kicker {
  margin: 0 0 11px;
  color: var(--primary);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .11em;
}

.choice-card h3 { font-size: clamp(28px, 3.2vw, 42px); line-height: 1.23; }

.choice-card > p:not(.card-kicker) {
  max-width: 440px;
  margin: 21px 0 24px;
}

.choice-card ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
}

.choice-card li::before {
  margin-right: 9px;
  color: var(--primary);
  content: "•";
}

.choice-card-dark li::before { color: var(--yellow); }

.card-link {
  position: relative;
  z-index: 1;
  display: inline-flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  width: fit-content;
  min-height: 48px;
  margin-top: auto;
  padding: 0 17px 0 20px;
  color: #fff;
  background: var(--primary);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.choice-card-dark .card-link { color: var(--ink); background: var(--yellow); }

.card-link:hover {
  box-shadow: 0 9px 20px rgb(15 154 134 / 24%);
  transform: translateY(-2px);
}

.future {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, .7fr);
  gap: clamp(28px, 7vw, 104px);
  align-items: end;
  padding: clamp(34px, 5vw, 56px);
  background: rgb(255 255 255 / 54%);
  border: 1px dashed #a8c9bf;
  border-radius: 28px;
}

.future p:last-child {
  max-width: 430px;
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

footer {
  display: flex;
  justify-content: space-between;
  padding: 34px 0 44px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 13px;
}

footer a { text-decoration: none; }
footer a:hover { color: var(--primary); }

@media (max-width: 720px) {
  .site-header { min-height: 70px; }
  .brand { font-size: 18px; }
  .brand-mark { width: 30px; height: 30px; font-size: 15px; }
  .home-link { font-size: 13px; }
  .intro { padding-top: 58px; }
  h1 { font-size: clamp(38px, 12vw, 56px); }
  .choice-grid, .future { grid-template-columns: 1fr; }
  .choice-card { min-height: 460px; padding: 30px; }
  .card-number { margin-bottom: 52px; }
  .future { gap: 24px; }
  footer { gap: 12px; flex-direction: column; }
}

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