:root {
  color-scheme: light;
  --paper: #f8f3e9;
  --paper-deep: #f0e8da;
  --surface: #fffdf8;
  --ink: #283126;
  --muted: #6f786d;
  --green: #365d3c;
  --green-soft: #dce5d7;
  --terracotta: #bd673d;
  --line: #d9d0c0;
  --shadow: 0 22px 70px rgba(66, 50, 35, 0.09);
  font-family: "Iowan Old Style", "Songti SC", "Noto Serif CJK SC", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
}
a { color: inherit; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--terracotta); outline-offset: 4px; }
.shell { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 72%, transparent);
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(18px);
}
.site-header .shell { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; font: 600 21px/1.2 var(--serif, "Songti SC", serif); }
.brand img { width: 44px; height: 44px; border-radius: 12px; box-shadow: 0 5px 18px rgba(55, 62, 46, .12); }
.nav { display: flex; align-items: center; gap: 28px; }
.nav a { min-height: 44px; display: inline-flex; align-items: center; text-decoration: none; color: var(--muted); font-weight: 600; }
.nav a[aria-current="page"], .nav a:hover { color: var(--green); }

.hero { padding: 96px 0 82px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(320px, .92fr); align-items: center; gap: 72px; }
h1, h2, h3 { font-family: "Iowan Old Style", "Songti SC", "Noto Serif CJK SC", serif; letter-spacing: -.025em; }
h1 { max-width: 760px; margin: 0 0 28px; font-size: clamp(46px, 6vw, 76px); line-height: 1.12; font-weight: 600; color: #344831; }
.lead { max-width: 660px; margin: 0; font-size: clamp(18px, 2vw, 22px); color: var(--muted); }
.actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; padding: 0 24px; border: 1px solid var(--green); border-radius: 8px; color: var(--green); text-decoration: none; font-weight: 700; }
.button.primary { color: #fff; background: var(--green); }
.hero-art { position: relative; display: grid; place-items: center; min-height: 500px; }
.hero-art::before { content: ""; position: absolute; width: 76%; aspect-ratio: 1; border: 1px solid var(--line); border-radius: 50%; }
.hero-art img { position: relative; width: min(100%, 480px); border-radius: 25%; mix-blend-mode: multiply; }
.trust { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin-top: 58px; border-top: 1px solid var(--line); }
.trust div { padding: 24px 24px 0 0; }
.trust div + div { padding-left: 24px; border-left: 1px solid var(--line); }
.trust strong { display: block; color: var(--green); font-size: 17px; }
.trust span { color: var(--muted); font-size: 14px; }

.band { padding: 88px 0; background: var(--surface); border-top: 1px solid var(--line); }
.band.alt { background: var(--paper-deep); }
.section-heading { max-width: 760px; margin-bottom: 48px; }
.section-heading h2 { margin: 0 0 14px; font-size: clamp(34px, 4vw, 50px); line-height: 1.2; color: #344831; }
.section-heading p { margin: 0; color: var(--muted); font-size: 18px; }
.flow { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 18px; margin: 42px 0 62px; counter-reset: flow; }
.flow article { position: relative; padding-top: 62px; border-top: 1px solid var(--line); }
.flow article::before { counter-increment: flow; content: counter(flow); position: absolute; top: 14px; left: 0; width: 34px; height: 34px; display: grid; place-items: center; border: 1px solid var(--green); border-radius: 50%; color: var(--green); font-weight: 800; }
.flow article:not(:last-child)::after { content: "→"; position: absolute; top: 17px; right: 0; color: var(--terracotta); }
.flow h3 { margin: 0 0 8px; font-size: 18px; }
.flow p { margin: 0; color: var(--muted); font-size: 14px; }
.policy-grid, .support-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 54px; }
.policy-item, .support-item { padding: 26px 0; border-top: 1px solid var(--line); }
.policy-item h3, .support-item h3 { margin: 0 0 8px; font-size: 21px; }
.policy-item p, .support-item p { margin: 0; color: var(--muted); }
.notice { margin-top: 40px; padding: 24px 28px; border: 1px solid #b9a994; border-left: 4px solid var(--terracotta); border-radius: 8px; background: rgba(255,253,248,.6); }
.notice strong { display: block; margin-bottom: 4px; }
.notice p { margin: 0; color: var(--muted); }
.document { padding: 72px 0 96px; }
.document .meta { margin: -12px 0 48px; color: var(--muted); }
.document section { padding: 32px 0; border-top: 1px solid var(--line); }
.document section h2 { margin: 0 0 14px; font-size: 28px; }
.document section h3 { margin: 24px 0 8px; font-size: 19px; }
.document p, .document li { color: #555f52; }
.document ul { padding-left: 1.3em; }
.contact { margin-top: 42px; padding: 34px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); box-shadow: var(--shadow); }
.contact h2 { margin-top: 0; }
.contact address { font-style: normal; }
.contact a { color: var(--green); font-weight: 800; }
.site-footer { padding: 42px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.site-footer .shell { display: flex; justify-content: space-between; gap: 32px; }
.site-footer p { margin: 0; max-width: 760px; }

@media (max-width: 820px) {
  .shell { width: min(100% - 32px, 680px); }
  .site-header .shell { min-height: 68px; }
  .brand { font-size: 18px; }
  .brand img { width: 38px; height: 38px; }
  .nav { gap: 14px; font-size: 14px; }
  .hero { padding: 66px 0; }
  .hero-grid { grid-template-columns: 1fr; gap: 24px; }
  .hero-art { min-height: 330px; order: -1; }
  .hero-art img { width: min(86%, 380px); }
  .trust, .flow, .policy-grid, .support-grid { grid-template-columns: 1fr; }
  .trust div + div { padding-left: 0; border-left: 0; }
  .flow article:not(:last-child)::after { content: "↓"; }
  .band { padding: 64px 0; }
  .site-footer .shell { flex-direction: column; }
}

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