:root {
  color-scheme: light;
  --ink: #173042;
  --muted: #587080;
  --line: #dbe6e8;
  --paper: #f7fbfa;
  --card: #ffffff;
  --mint: #dff4ed;
  --teal: #087b74;
  --teal-dark: #075b58;
  --coral: #f18a70;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 85% 5%, rgba(241, 138, 112, 0.14), transparent 26rem),
    linear-gradient(180deg, #f7fbfa 0, #ffffff 34rem);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
  line-height: 1.75;
}

a { color: var(--teal-dark); }
a:hover { color: var(--teal); }

.shell {
  width: min(100% - 40px, 980px);
  margin-inline: auto;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-block: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-weight: 760;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 11px;
  background: var(--teal);
  color: white;
  font-size: 18px;
}

nav { display: flex; gap: 20px; font-size: 14px; }
nav a { color: var(--muted); text-decoration: none; }

main { padding-block: 72px 88px; }

.hero {
  display: grid;
  grid-template-columns: 1.45fr 0.75fr;
  align-items: center;
  gap: 64px;
  min-height: 480px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 760;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1, h2 { line-height: 1.25; letter-spacing: -0.035em; }
h1 { max-width: 13ch; margin: 0; font-size: clamp(44px, 7vw, 78px); }
h2 { margin: 0 0 20px; font-size: clamp(28px, 4vw, 40px); }
h3 { margin: 0 0 8px; font-size: 18px; }

.lead {
  max-width: 640px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.flow-card, .content-card {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 22px 70px rgba(21, 64, 72, 0.08);
}

.flow-card { padding: 26px; }
.flow-card ol { margin: 0; padding: 0; list-style: none; }
.flow-card li { display: flex; align-items: center; gap: 14px; padding-block: 15px; }
.flow-card li + li { border-top: 1px solid var(--line); }

.step {
  display: grid;
  flex: 0 0 34px;
  height: 34px;
  place-items: center;
  border-radius: 50%;
  background: var(--mint);
  color: var(--teal-dark);
  font-size: 13px;
  font-weight: 800;
}

.section { padding-block: 62px; }
.section p { max-width: 720px; color: var(--muted); }

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 30px;
}

.mini-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--card);
}

.mini-card p { margin: 0; font-size: 15px; }

.policy { max-width: 780px; }
.policy h1 { max-width: none; font-size: clamp(38px, 6vw, 62px); }
.policy .updated { color: var(--muted); font-size: 14px; }
.content-card { margin-top: 42px; padding: clamp(26px, 5vw, 54px); }
.content-card section + section { margin-top: 38px; }
.content-card p, .content-card li { color: var(--muted); }
.content-card ul { padding-left: 1.25em; }

footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-block: 28px 42px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.footer-links { display: flex; gap: 18px; }

@media (max-width: 760px) {
  .shell { width: min(100% - 28px, 980px); }
  header { align-items: flex-start; flex-direction: column; }
  nav { flex-wrap: wrap; gap: 12px 18px; }
  main { padding-block: 42px 64px; }
  .hero { grid-template-columns: 1fr; gap: 40px; min-height: auto; }
  .grid { grid-template-columns: 1fr; }
  footer { flex-direction: column; }
}