:root {
  --ink: #161d2b;
  --ink-soft: #465064;
  --paper: #faf7f2;
  --paper-2: #f1ece3;
  --card: #fff;
  --accent: #e2621f;
  --accent-dark: #b84c12;
  --teal: #1f7a70;
  --line: #dfd7ca;
  --shadow: 0 20px 55px -32px rgba(22, 29, 43, .48);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  color: var(--ink);
  background: var(--paper);
  font-family: "Noto Sans JP", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 16.5px;
  font-weight: 500;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 {
  font-family: "Zen Kaku Gothic New", "Noto Sans JP", sans-serif;
  line-height: 1.4;
}
a { color: inherit; }
.wrap { width: min(1080px, calc(100% - 48px)); margin: 0 auto; }
.narrow { width: min(780px, calc(100% - 48px)); margin: 0 auto; }
.accent { color: var(--accent-dark); }

header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(250, 247, 242, .94);
  backdrop-filter: blur(12px);
}
.nav { min-height: 66px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  font-family: "Zen Kaku Gothic New", sans-serif;
  font-size: 21px;
  font-weight: 900;
}
.brand img { width: 38px; height: 38px; border: 2px solid var(--accent); border-radius: 50%; }
.brand small {
  display: block;
  margin-top: -3px;
  color: var(--ink-soft);
  font-size: 10.5px;
  letter-spacing: .16em;
}
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a { color: var(--ink-soft); font-size: 14px; font-weight: 800; text-decoration: none; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 20px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff !important;
  font-weight: 900;
  text-decoration: none;
  box-shadow: 0 9px 22px -12px rgba(226, 98, 31, .8);
}

.hero {
  padding: 62px 0 58px;
  background:
    radial-gradient(900px 450px at 90% 0, rgba(226, 98, 31, .15), transparent 60%),
    radial-gradient(700px 400px at 5% 110%, rgba(31, 122, 112, .11), transparent 58%);
}
.crumb { margin-bottom: 20px; color: var(--ink-soft); font-size: 13px; font-weight: 700; }
.crumb a { color: var(--accent-dark); text-decoration: none; }
.eyebrow {
  display: inline-block;
  margin-bottom: 20px;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--accent-dark);
  font-size: 12.5px;
  font-weight: 900;
  letter-spacing: .08em;
}
.hero h1 { max-width: 21em; margin-bottom: 18px; font-size: clamp(30px, 4.7vw, 50px); font-weight: 900; }
.hero .lead { max-width: 43em; color: var(--ink-soft); font-size: 18px; }
.hero .lead strong { color: var(--ink); }

.facts { padding: 30px 0; background: var(--ink); color: #fff; }
.facts-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; text-align: center; }
.fact b {
  display: block;
  color: #ffb07a;
  font-family: "Zen Kaku Gothic New", sans-serif;
  font-size: 29px;
  font-weight: 900;
  line-height: 1.2;
}
.fact span { display: block; margin-top: 5px; color: #ccc3b7; font-size: 13px; line-height: 1.55; }

section { padding: 66px 0; }
.alt { background: var(--paper-2); }
.tag { margin-bottom: 10px; color: var(--accent-dark); font-size: 12px; font-weight: 900; letter-spacing: .14em; text-transform: uppercase; }
.title { margin-bottom: 18px; font-size: clamp(25px, 3.3vw, 35px); font-weight: 900; }
.body p { margin-bottom: 20px; color: var(--ink-soft); }
.body p strong { color: var(--ink); }
.body h3 { margin: 34px 0 12px; font-size: 20px; font-weight: 900; }
.body ul { margin: 0 0 24px 1.3em; color: var(--ink-soft); }
.body li { margin-bottom: 7px; }

.callout {
  margin: 30px 0;
  padding: 24px 27px;
  border: 1px solid var(--line);
  border-left: 5px solid var(--accent);
  border-radius: 14px;
  background: #fff;
}
.callout.teal { border-left-color: var(--teal); }
.callout b { display: block; margin-bottom: 7px; font-size: 20px; font-weight: 900; }
.callout p { margin: 0; }

.flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; margin-top: 30px; }
.step {
  position: relative;
  min-height: 170px;
  padding: 20px 17px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: #fff;
  box-shadow: var(--shadow);
}
.step::after {
  position: absolute;
  top: 50%;
  right: -13px;
  z-index: 2;
  color: var(--accent);
  content: "›";
  font-size: 27px;
  font-weight: 900;
  transform: translateY(-50%);
}
.step:last-child::after { display: none; }
.step small { color: var(--accent-dark); font-size: 11px; font-weight: 900; letter-spacing: .08em; }
.step h3 { margin: 6px 0 7px; font-size: 16px; }
.step p { color: var(--ink-soft); font-size: 13.5px; line-height: 1.7; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 28px; }
.card {
  padding: 24px 22px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  box-shadow: var(--shadow);
}
.card .num { color: var(--accent); font-family: "Zen Kaku Gothic New", sans-serif; font-size: 28px; font-weight: 900; }
.card h3 { margin: 8px 0; font-size: 18px; }
.card p { color: var(--ink-soft); font-size: 14px; line-height: 1.75; }

.evidence { width: 100%; margin: 26px 0; border-collapse: collapse; overflow: hidden; border: 1px solid var(--line); background: #fff; font-size: 14.5px; }
.evidence th, .evidence td { padding: 13px 15px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.evidence th { background: #ebe5dc; font-size: 12.5px; letter-spacing: .04em; }
.evidence tr:last-child td { border-bottom: 0; }
.evidence td:first-child { width: 27%; font-weight: 900; }

.note {
  margin-top: 28px;
  padding: 14px 17px;
  border: 1px dashed var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, .7);
  color: var(--ink-soft);
  font-size: 12.5px;
}
.cta { padding: 70px 0; background: var(--ink); color: #fff; text-align: center; }
.cta h2 { margin-bottom: 12px; font-size: clamp(26px, 3.5vw, 37px); }
.cta p { max-width: 38em; margin: 0 auto 26px; color: #cfc6ba; }
.cta-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.btn-ghost { border: 1px solid rgba(255,255,255,.4); background: transparent; box-shadow: none; }

.case-list { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 30px; }
.case-link {
  display: flex;
  min-height: 280px;
  flex-direction: column;
  padding: 27px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  box-shadow: var(--shadow);
  text-decoration: none;
  transition: transform .15s, border-color .15s;
}
.case-link:hover { border-color: var(--accent); transform: translateY(-3px); }
.case-no { margin-bottom: 13px; color: var(--accent-dark); font-size: 12px; font-weight: 900; letter-spacing: .09em; }
.case-link h2 { margin-bottom: 12px; font-size: 23px; }
.case-link p { color: var(--ink-soft); font-size: 14.5px; }
.case-link .more { margin-top: auto; padding-top: 20px; color: var(--accent-dark); font-weight: 900; }

footer { padding: 40px 0; background: #0f1520; color: #aaa195; font-size: 13px; }
.footer-row { display: flex; justify-content: space-between; gap: 20px; }
footer a { color: #ddd5ca; text-decoration: none; }

@media (max-width: 900px) {
  .nav-links a:not(.btn) { display: none; }
  .flow { grid-template-columns: 1fr 1fr; }
  .step::after { display: none; }
  .cards { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
  .facts-grid { grid-template-columns: 1fr 1fr; }
  .case-list { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .evidence { font-size: 13px; }
  .evidence th, .evidence td { padding: 11px; }
  .footer-row { flex-direction: column; }
}
@media (max-width: 480px) {
  .wrap, .narrow { width: min(100% - 32px, 1080px); }
  .hero { padding: 44px 0; }
  .facts-grid { gap: 18px 10px; }
  .fact b { font-size: 24px; }
}