:root {
  --ink: #1f2a2e;
  --muted: #63706d;
  --paper: #fbf8f2;
  --panel: #fffdf8;
  --line: #ded6c9;
  --green: #3f6d5a;
  --blue: #2e4f58;
  --gold: #b8843f;
  --coral: #bd6b50;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.75;
}

a {
  color: var(--blue);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

img {
  max-width: 100%;
  display: block;
}

.notice {
  background: var(--ink);
  color: #fffdf8;
  padding: 10px 18px;
  text-align: center;
  font-size: 14px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 20px clamp(18px, 4vw, 56px);
  border-bottom: 1px solid var(--line);
  background: rgba(251, 248, 242, 0.96);
  position: sticky;
  top: 0;
  z-index: 3;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--blue);
  color: #fff;
  font-weight: 900;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 22px;
  font-size: 14px;
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.82fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: center;
  padding: clamp(46px, 8vw, 90px) clamp(18px, 4vw, 56px) 40px;
}

.eyebrow {
  color: var(--coral);
  font-weight: 800;
  letter-spacing: 0;
  margin: 0 0 12px;
}

h1,
h2,
h3 {
  line-height: 1.28;
  letter-spacing: 0;
}

h1 {
  font-size: clamp(34px, 5vw, 64px);
  margin: 0 0 22px;
}

h2 {
  font-size: clamp(26px, 3vw, 38px);
  margin: 0 0 18px;
}

h3 {
  font-size: 20px;
  margin: 0 0 8px;
}

.lead {
  color: var(--muted);
  font-size: 18px;
  max-width: 680px;
}

.hero-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  border: 1px solid var(--ink);
  border-radius: 8px;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 16px;
  text-decoration: none;
  font-weight: 700;
}

.button.primary {
  background: var(--ink);
  color: #fffdf8;
}

.hero-visual {
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #efe7da;
}

.band {
  padding: 56px clamp(18px, 4vw, 56px);
}

.band.alt {
  background: #eef2ec;
}

.inner {
  max-width: 1120px;
  margin: 0 auto;
}

.section-head {
  max-width: 780px;
  margin-bottom: 28px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
}

.card p {
  color: var(--muted);
  margin: 0 0 16px;
}

.tag {
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
}

.checklist {
  display: grid;
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.checklist li {
  background: var(--panel);
  border-left: 5px solid var(--green);
  padding: 14px 16px;
}

.policy-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.article {
  max-width: 820px;
  margin: 0 auto;
  padding: 54px 18px 72px;
}

.article header {
  border-bottom: 1px solid var(--line);
  margin-bottom: 32px;
  padding-bottom: 22px;
}

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

.article h1 {
  font-size: clamp(30px, 4vw, 46px);
}

.article h2 {
  margin-top: 42px;
}

.note {
  background: #fff6df;
  border: 1px solid #e5c98d;
  border-radius: 8px;
  padding: 16px;
}

.site-footer {
  background: var(--ink);
  color: #fffdf8;
  padding: 34px clamp(18px, 4vw, 56px);
}

.site-footer a {
  color: #fffdf8;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: start;
}

@media (max-width: 820px) {
  .site-header,
  .hero,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .site-header {
    align-items: flex-start;
  }

  .hero {
    display: block;
  }

  .hero-visual {
    margin-top: 28px;
  }

  .grid,
  .policy-list {
    grid-template-columns: 1fr;
  }
}