*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  --brown: #3a2c1b;
  --brown-dark: #21170e;
  --ink: #241f18;
  --sub: #5a5045;
  --muted: #877a6b;
  --paper: #f4ede2;
  --surface: #fffdf9;
  --line: #dfd2bf;
  --gold: #b98e38;
  --gold-pale: #eee0bf;
  font-family: "Hiragino Sans", "Yu Gothic", YuGothic, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.8;
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
h1, h2, h3 { font-family: "Hiragino Mincho ProN", "Yu Mincho", YuMincho, serif; line-height: 1.4; letter-spacing: .04em; }
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(244,237,226,.94); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
.site-header__inner { width: min(1040px, calc(100% - 32px)); min-height: 64px; margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { font-family: Georgia, "Yu Mincho", serif; font-size: 21px; font-weight: 700; letter-spacing: .04em; }
.back { font-size: 13px; font-weight: 700; color: var(--sub); }
.back:hover { color: var(--gold); }
.page { width: min(1040px, calc(100% - 32px)); margin: 0 auto; padding: clamp(34px, 6vw, 72px) 0 80px; }
.page-hero { display: grid; grid-template-columns: 1.05fr .95fr; align-items: stretch; overflow: hidden; border: 1px solid var(--line); background: var(--surface); }
.page-hero__copy { padding: clamp(28px, 5vw, 58px); display: flex; flex-direction: column; justify-content: center; }
.eyebrow { color: var(--gold); font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.page-hero h1 { margin-top: 14px; font-size: clamp(28px, 4.6vw, 46px); color: var(--brown-dark); }
.page-hero__lead { margin-top: 16px; color: var(--sub); font-size: clamp(14px, 1.8vw, 17px); }
.page-hero__image { min-height: 360px; width: 100%; height: 100%; object-fit: cover; }
.disclaimer { margin-top: 14px; font-size: 11px; color: var(--muted); }
.process-map { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin: 28px 0 48px; background: var(--line); border: 1px solid var(--line); }
.process-map a { position: relative; min-height: 104px; padding: 18px; background: var(--surface); }
.process-map a::after { content: "→"; position: absolute; right: -9px; top: 38px; z-index: 2; color: var(--gold); font-size: 18px; font-weight: 800; }
.process-map a:last-child::after { display: none; }
.process-map small { display: block; color: var(--gold); font-weight: 800; letter-spacing: .1em; }
.process-map strong { display: block; margin-top: 4px; font-size: 15px; }
.section { padding: 48px 0; border-top: 1px solid var(--line); }
.section:first-of-type { border-top: 0; }
.section-head { display: grid; grid-template-columns: 150px 1fr; gap: 24px; margin-bottom: 28px; align-items: start; }
.section-no { color: var(--gold); font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.section h2 { font-size: clamp(24px, 3.2vw, 34px); color: var(--brown-dark); }
.section-intro { margin-top: 10px; color: var(--sub); max-width: 760px; }
.profile-grid, .kpi-grid, .insight-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.profile-card, .kpi-card, .insight-card { background: var(--surface); border: 1px solid var(--line); padding: 22px; }
.profile-card small, .kpi-card small { display: block; color: var(--muted); font-size: 11px; font-weight: 800; letter-spacing: .06em; }
.profile-card strong { display: block; margin-top: 7px; font-size: 16px; }
.kpi-card strong { display: block; margin-top: 8px; color: var(--brown); font-family: Georgia, serif; font-size: clamp(25px, 4vw, 38px); line-height: 1.1; }
.kpi-card span { display: block; margin-top: 8px; color: var(--sub); font-size: 13px; }
.issue-tree { display: grid; grid-template-columns: .72fr 1.28fr; gap: 18px; align-items: stretch; }
.issue-root { display: grid; place-items: center; min-height: 220px; padding: 26px; background: var(--brown); color: white; text-align: center; }
.issue-root strong { font-family: "Yu Mincho", serif; font-size: 23px; }
.issue-branches { display: grid; gap: 10px; }
.issue-branch { position: relative; padding: 20px 22px; background: var(--surface); border: 1px solid var(--line); }
.issue-branch::before { content: ""; position: absolute; left: -19px; top: 50%; width: 18px; border-top: 1px solid var(--gold); }
.issue-branch b { display: block; color: var(--brown); }
.issue-branch p { margin-top: 4px; color: var(--sub); font-size: 13px; }
.timeline { display: grid; gap: 14px; }
.timeline-item { display: grid; grid-template-columns: 74px 1fr; gap: 18px; align-items: stretch; }
.timeline-item__label { display: grid; place-items: center; background: var(--brown); color: white; font-size: 12px; font-weight: 800; text-align: center; padding: 10px; }
.timeline-item__body { padding: 20px 22px; background: var(--surface); border: 1px solid var(--line); }
.timeline-item h3 { font-size: 18px; color: var(--brown-dark); }
.timeline-item p { margin-top: 6px; color: var(--sub); font-size: 14px; }
.bar-chart { display: grid; gap: 16px; padding: 24px; background: var(--surface); border: 1px solid var(--line); }
.bar-row { display: grid; grid-template-columns: 150px 1fr 58px; gap: 12px; align-items: center; font-size: 13px; }
.bar-track { height: 16px; background: #e9dfd1; overflow: hidden; }
.bar { height: 100%; background: var(--brown); }
.bar--after { background: var(--gold); }
.observation { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.observation article { padding: 22px; border-top: 3px solid var(--gold); background: var(--surface); }
.observation strong { display: block; color: var(--brown-dark); }
.observation p { margin-top: 7px; color: var(--sub); font-size: 13px; }
.callout { margin-top: 28px; padding: 26px 28px; background: var(--gold-pale); border-left: 4px solid var(--gold); }
.callout strong { display: block; font-family: "Yu Mincho", serif; font-size: 20px; color: var(--brown-dark); }
.callout p { margin-top: 7px; color: var(--sub); }
.article-shell { width: min(820px, calc(100% - 32px)); margin: 0 auto; padding: clamp(38px, 7vw, 78px) 0 80px; }
.article-header { text-align: center; margin-bottom: 32px; }
.article-header h1 { margin-top: 14px; font-size: clamp(29px, 5vw, 44px); }
.article-meta { margin-top: 13px; color: var(--muted); font-size: 12px; }
.article-cover { width: 100%; aspect-ratio: 16 / 8; object-fit: cover; border: 1px solid var(--line); }
.article-body { margin-top: 28px; padding: clamp(24px, 5vw, 48px); background: var(--surface); border: 1px solid var(--line); }
.article-body h2 { margin: 42px 0 14px; padding-left: 14px; border-left: 3px solid var(--gold); font-size: clamp(21px, 3vw, 28px); }
.article-body h2:first-child { margin-top: 0; }
.article-body h3 { margin: 26px 0 9px; font-size: 18px; }
.article-body p { margin-bottom: 16px; }
.article-body ul { margin: 0 0 20px; display: grid; gap: 8px; }
.article-body li { position: relative; padding-left: 20px; }
.article-body li::before { content: ""; position: absolute; left: 0; top: .75em; width: 8px; border-top: 2px solid var(--gold); }
.formula { margin: 22px 0; padding: 22px; background: var(--brown); color: white; text-align: center; font-family: Georgia, "Yu Mincho", serif; font-size: clamp(17px, 3vw, 24px); }
.checklist { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin: 20px 0; }
.checklist div { padding: 15px 16px 15px 42px; background: var(--paper); border: 1px solid var(--line); position: relative; font-size: 14px; }
.checklist div::before { content: "✓"; position: absolute; left: 16px; color: var(--gold); font-weight: 900; }
.cta { margin-top: 42px; padding: 34px; background: var(--brown); color: white; text-align: center; }
.cta h2 { color: white; font-size: 24px; }
.cta p { margin-top: 8px; color: rgba(255,255,255,.72); }
.btn { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; margin-top: 18px; padding: 0 28px; background: white; color: var(--brown); font-size: 14px; font-weight: 800; }
.site-footer { padding: 26px 16px; background: var(--brown-dark); color: rgba(255,255,255,.55); text-align: center; font-size: 11px; }
@media (max-width: 760px) {
  .page-hero { grid-template-columns: 1fr; }
  .page-hero__image { min-height: 230px; order: -1; }
  .process-map { grid-template-columns: 1fr 1fr; }
  .process-map a::after { display: none; }
  .section-head { grid-template-columns: 1fr; gap: 7px; }
  .profile-grid, .kpi-grid, .insight-grid, .observation { grid-template-columns: 1fr; }
  .issue-tree { grid-template-columns: 1fr; }
  .issue-branch::before { display: none; }
  .bar-row { grid-template-columns: 110px 1fr 50px; }
  .checklist { grid-template-columns: 1fr; }
  .site-header__inner { min-height: 58px; }
  .back { max-width: 48%; text-align: right; line-height: 1.4; }
}