:root {
  --bg: #f3f0e8;
  --paper: #fffcf6;
  --ink: #1b2420;
  --muted: #5d675f;
  --line: #e3ddd1;
  --green: #1d6b56;
  --green-deep: #144a3c;
  --pond: #e5f1eb;
  --sand: #efe6d4;
  --shadow: 0 18px 40px rgba(27, 36, 32, 0.08);
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", sans-serif;
  --serif: "Songti SC", "STSong", "SimSun", "PMingLiU", serif;
  --max: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% -10%, #e7f3ed 0, transparent 36%),
    linear-gradient(180deg, #f7f4ed 0%, var(--bg) 280px);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
}

img { max-width: 100%; height: auto; }

a { color: var(--green-deep); }

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

h1, h2, h3, .logo {
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.35;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(247, 244, 237, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 72px;
  padding: 10px 0;
}

.logo {
  color: var(--ink);
  text-decoration: none;
  font-size: 22px;
  white-space: nowrap;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-left: 8px;
}

.nav a {
  color: var(--ink);
  text-decoration: none;
  font-size: 15px;
}

.nav a[aria-current="page"] {
  color: var(--green-deep);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.status {
  margin-left: auto;
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
  cursor: default;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 999px;
  padding: 4px 10px;
}

.hero { padding: 72px 0 28px; }

.eyebrow {
  margin: 0 0 12px;
  color: var(--green);
  font-size: 14px;
  letter-spacing: 0.14em;
}

.hero h1 {
  margin: 0;
  max-width: 16em;
  font-size: 48px;
  line-height: 1.25;
}

.lede {
  max-width: 38em;
  margin: 18px 0 0;
  font-size: 18px;
}

.filing-note {
  max-width: 40em;
  margin: 16px 0 0;
  color: var(--muted);
}

.stage {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  margin: 42px 0 10px;
  padding: 28px;
  background:
    linear-gradient(180deg, rgba(255, 252, 246, 0.4), rgba(255, 252, 246, 0.85)),
    var(--pond);
  border: 1px solid #d5e6de;
  border-radius: 22px;
}

.file-card, .note-card, .sheet, .cell, .faq-card, .qr-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.file-card, .note-card { padding: 16px; }

.frame {
  height: 190px;
  border-radius: 12px;
  background:
    radial-gradient(circle at 72% 18%, #f6e7c4 0 18%, transparent 19%),
    linear-gradient(165deg, #f7fbf8 0%, #d5ebe3 42%, #7eae9e 100%);
  display: flex;
  align-items: flex-end;
  padding: 14px;
}

.frame span, .tag {
  display: inline-block;
  background: rgba(255, 252, 246, 0.88);
  color: var(--green-deep);
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 13px;
}

.file-card h2, .note-card h2, .sheet h3 {
  margin: 14px 0 8px;
  font-size: 22px;
}

.file-meta, .note-card time, .muted { color: var(--muted); }

.note-card p { margin: 0 0 8px; }

.section { padding: 56px 0; }

.section h2 {
  margin: 0 0 22px;
  font-size: 32px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.steps li {
  padding: 22px 20px 18px;
  background: var(--paper);
  border-top: 3px solid var(--green);
  border-radius: 4px 4px 14px 14px;
}

.steps strong {
  display: block;
  margin-bottom: 8px;
  color: var(--green);
  font-family: var(--serif);
  font-size: 20px;
}

.layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 36px;
  align-items: start;
}

.sheet { padding: 22px 22px 8px; }

.sheet dl { margin: 0; }

.sheet dl div {
  display: grid;
  grid-template-columns: 6.5em 1fr;
  gap: 10px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.sheet dt { color: var(--green-deep); }

.sheet dd { margin: 0; }

.explain { color: var(--muted); }

.cells {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.cell { padding: 20px 18px; }

.cell span {
  display: block;
  margin-bottom: 8px;
  color: var(--green);
  font-family: var(--serif);
  font-size: 18px;
}

.cell p { margin: 0; }

.privacy-band {
  background: var(--green-deep);
  color: #f4f1ea;
  border-radius: 20px;
  padding: 36px 32px;
}

.privacy-band h2 { color: inherit; }

.privacy-band a {
  color: #fff;
  font-weight: 600;
}

.faq {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 28px;
  align-items: start;
}

.qr-card {
  padding: 16px;
  text-align: center;
}

.qr-card img {
  width: 120px;
  height: 120px;
  object-fit: contain;
}

.qr-card strong {
  display: block;
  margin-top: 8px;
  font-size: 18px;
  letter-spacing: 0.04em;
}

.footer-qr strong {
  display: block;
  margin: 0 0 8px;
  font-size: 15px;
  white-space: nowrap;
}

.qr-kicker { margin: 0; font-size: 14px; }

.faq-list { display: grid; gap: 12px; }

.faq-card { padding: 14px 16px 12px; box-shadow: none; }

.faq-card h3 {
  margin: 0 0 4px;
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 600;
}

.faq-card p { margin: 0; color: var(--muted); }

.page { padding: 48px 0 24px; }

.page-head h1 { margin: 0 0 8px; font-size: 40px; }

.prose {
  max-width: 42em;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 8px 28px 20px;
}

.prose section, .prose > p { border-top: 1px solid var(--line); }

.prose h2 { margin: 22px 0 8px; font-size: 24px; }

.updated { color: var(--muted); font-size: 14px; }

.contact {
  min-height: 46vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 28px 0 10px;
}

.contact img {
  width: 240px;
  height: 240px;
  object-fit: contain;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 12px;
}

.contact h1 { margin: 18px 0 0; font-size: 32px; }

.contact .group-no {
  margin: 6px 0 0;
  font-size: 20px;
  letter-spacing: 0.04em;
}

.site-footer {
  margin-top: 28px;
  border-top: 1px solid var(--line);
  background: #ebe6dc;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.8fr auto;
  gap: 28px;
  padding: 32px 0 12px;
}

.footer-name {
  font-family: var(--serif);
  font-size: 20px;
  margin: 0 0 8px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-links a { color: var(--ink); text-decoration: none; }

.footer-qr img {
  width: 120px;
  height: 120px;
  object-fit: contain;
  background: var(--paper);
  border-radius: 10px;
  padding: 6px;
}

.footer-bottom {
  border-top: 1px solid var(--line);
  padding: 14px 0 22px;
  color: var(--muted);
  font-size: 13px;
}

.footer-bottom p { margin: 0 0 6px; }

@media (max-width: 800px) {
  .hero { padding-top: 36px; }
  .hero h1 { font-size: 34px; }
  .stage, .steps, .layout, .cells, .faq, .footer-grid {
    grid-template-columns: 1fr;
  }
  .header-inner { align-items: flex-start; flex-wrap: wrap; }
  .status { margin-left: 0; }
  .nav { width: 100%; margin-left: 0; }
  .sheet dl div { grid-template-columns: 1fr; gap: 2px; }
  .wrap { width: min(var(--max), calc(100% - 28px)); }
  .prose { padding: 4px 16px 12px; }
}