:root {
  --bg: #f7f9fc;
  --surface: #ffffff;
  --surface-alt: #eef4fb;
  --text: #1c2733;
  --muted: #526170;
  --primary: #1f4f8a;
  --border: #d6e0ea;
  --shadow: 0 10px 24px rgba(19, 45, 77, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
}

.container {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
}

.narrow {
  width: min(760px, 100%);
}

.site-header {
  padding: 72px 0 56px;
  background: linear-gradient(180deg, #163e6e 0%, #245d96 100%);
  color: #fff;
}

.eyebrow {
  margin: 0 0 12px;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  opacity: 0.88;
}

h1,
 h2,
 h3 {
  line-height: 1.3;
  margin-top: 0;
}

h1 {
  margin-bottom: 16px;
  font-size: clamp(2rem, 4vw, 3rem);
}

h2 {
  margin-bottom: 16px;
  font-size: 1.7rem;
  color: var(--primary);
}

h3 {
  margin-bottom: 12px;
  font-size: 1.15rem;
}

.subsection-heading {
  margin: 28px 0 14px;
  color: var(--primary);
}

.lead {
  max-width: 56rem;
  margin: 0;
  font-size: 1.08rem;
}

.section {
  padding: 56px 0;
}

.section-alt {
  background: var(--surface-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-intro {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 0.98rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  box-shadow: var(--shadow);
}

.card-cover,
.hero-visual img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, #eef4fb 0%, #ffffff 100%);
}

.card-cover {
  margin: 0 0 16px;
  aspect-ratio: 1200 / 630;
  object-fit: cover;
}

.card-kicker {
  display: inline-flex;
  align-items: center;
  margin: 0 0 10px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--surface-alt);
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 700;
}

.hero-visual {
  margin: 0;
}

.hero-visual img {
  box-shadow: var(--shadow);
}

.check-list,
.link-list {
  padding-left: 1.2rem;
  margin: 0;
}

.check-list li + li,
.link-list li + li {
  margin-top: 10px;
}

.category-lead-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.category-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.category-lead-links a,
.category-chips a {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
}

.site-footer {
  padding: 28px 0 40px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  background: #fff;
}

.text-link {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
}

.text-link:hover {
  text-decoration: underline;
}

.meta-note {
  color: var(--muted);
  font-size: 0.95rem;
}

p {
  margin-top: 0;
}

@media (max-width: 640px) {
  .site-header {
    padding: 56px 0 44px;
  }

  .section {
    padding: 44px 0;
  }
}