:root {
  --bg: #f1ebde;
  --surface: rgba(255, 252, 247, 0.88);
  --surface-strong: #fffdfa;
  --text: #1f1a14;
  --muted: #62594f;
  --line: rgba(70, 58, 45, 0.15);
  --line-strong: rgba(70, 58, 45, 0.26);
  --accent: #1f5ca8;
  --shadow: 0 24px 54px rgba(37, 28, 19, 0.1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "IBM Plex Sans JP", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(31, 92, 168, 0.08), transparent 24%),
    linear-gradient(180deg, #f8f4ec 0%, var(--bg) 100%);
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.page {
  width: min(820px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 28px 0 72px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px 18px;
  padding-bottom: 18px;
}

.topbar a {
  color: var(--text);
}

.top-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
}

.hero,
.section {
  border: 1px solid var(--line);
  border-radius: 26px;
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.hero {
  padding: 30px;
}

.eyebrow {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.74);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 18px 0 12px;
  font-size: clamp(1.9rem, 4.4vw, 2.9rem);
  line-height: 1.18;
  letter-spacing: -0.03em;
}

.lead {
  margin: 0;
  color: var(--muted);
  line-height: 1.9;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 0.92rem;
}

.sections {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}

.section {
  padding: 26px 30px;
}

.section h2 {
  margin: 0 0 14px;
  font-size: 1.5rem;
  line-height: 1.3;
}

.section p,
.section li {
  color: var(--muted);
  line-height: 1.95;
}

.section p {
  margin: 0 0 14px;
}

.section p:last-child,
.section ul:last-child {
  margin-bottom: 0;
}

.section ul {
  margin: 0 0 14px;
  padding-left: 1.3rem;
}

.section li {
  margin-bottom: 8px;
}

.section li::marker {
  color: var(--line-strong);
}

.callout {
  margin: 18px 0 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface-strong);
}

.callout p {
  margin: 0;
}

.cta {
  margin-top: 8px;
  padding: 26px 30px;
  border-radius: 26px;
  border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, rgba(31, 92, 168, 0.08), rgba(255, 253, 250, 0.9));
  box-shadow: var(--shadow);
}

.cta h2 {
  margin: 0 0 10px;
  font-size: 1.35rem;
}

.cta p {
  margin: 0 0 16px;
  color: var(--muted);
  line-height: 1.9;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  padding: 12px 22px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
}

.cta-button:hover {
  text-decoration: none;
  background: #184b8a;
}

.related {
  margin-top: 18px;
  padding: 22px 30px;
  border: 1px solid var(--line);
  border-radius: 26px;
  background: var(--surface);
}

.related h2 {
  margin: 0 0 12px;
  font-size: 1.1rem;
}

.related ul {
  margin: 0;
  padding-left: 1.2rem;
}

.related li {
  margin-bottom: 8px;
  line-height: 1.8;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 28px;
  color: var(--muted);
  font-size: 0.94rem;
}

@media (max-width: 640px) {
  .page {
    width: min(100vw - 20px, 820px);
    padding-top: 20px;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero,
  .section,
  .cta,
  .related {
    padding: 22px 18px;
  }
}