:root {
  color-scheme: light;
  --ink: #18211d;
  --muted: #637069;
  --line: #dfe7e2;
  --paper: #f7faf8;
  --card: #ffffff;
  --accent: #176b4a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
}

a { color: var(--accent); text-underline-offset: 0.2em; }

.shell { width: min(760px, calc(100% - 32px)); margin: 0 auto; padding: 64px 0; }
.home { padding-top: 96px; }
.eyebrow { margin: 0 0 8px; color: var(--accent); font-size: 13px; font-weight: 700; letter-spacing: 0.12em; }
h1 { margin: 0 0 16px; font-size: clamp(36px, 8vw, 60px); line-height: 1.15; }
h2 { margin-top: 2em; line-height: 1.35; }
h3 { margin-top: 1.8em; line-height: 1.4; }
.lead { max-width: 620px; margin: 0 0 48px; color: var(--muted); font-size: 20px; }
.card { margin: 20px 0; padding: 24px; border: 1px solid var(--line); border-radius: 18px; background: var(--card); }
.card h2 { margin-top: 0; }
.link-list { display: grid; gap: 10px; }
.link-list a { display: block; padding: 10px 0; border-bottom: 1px solid var(--line); text-decoration: none; }
.link-list a:last-child { border-bottom: 0; }
footer { margin-top: 48px; color: var(--muted); font-size: 14px; }
.site-footer { text-align: center; }
.site-footer p { margin: 6px 0; }
.document { background: var(--card); }
.document h1 { margin-top: 24px; font-size: clamp(32px, 7vw, 48px); }
.document li { margin: 0.5em 0; }
.back { text-decoration: none; }
.contact { padding: 18px 20px; border-left: 4px solid var(--accent); background: #eef6f1; font-size: 18px; }

@media (max-width: 600px) {
  .shell { padding-top: 36px; padding-bottom: 48px; }
  .home { padding-top: 64px; }
  .card { padding: 20px; border-radius: 14px; }
}