:root {
  --blue: #1a5fb4;
  --blue-dark: #0d3b7a;
  --green: #3f9a1f;
  --green-soft: #eef7e8;
  --ink: #1d2733;
  --muted: #5b6776;
  --line: #dde3ea;
  --bg: #ffffff;
  --bg-alt: #f5f8fb;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
img { max-width: 100%; height: auto; }
a { color: var(--blue-dark); }
a:hover { color: var(--blue); }

.wrap { max-width: 860px; margin: 0 auto; padding: 0 16px; }

.site-header { border-bottom: 1px solid var(--line); }
.site-header .wrap {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 12px; padding-top: 14px; padding-bottom: 14px;
}
.brand img { display: block; height: 48px; width: auto; }
.site-header nav { display: flex; flex-wrap: wrap; gap: 20px; }
.site-header nav a { text-decoration: none; font-weight: 600; }

main { padding: 40px 0 56px; }
h1 { font-size: clamp(2rem, 5vw, 2.75rem); line-height: 1.15; color: var(--blue-dark); margin: 0 0 12px; }
h2 { font-size: 1.35rem; color: var(--blue-dark); margin: 40px 0 10px; }
.lede { font-size: 1.2rem; color: var(--muted); margin: 0 0 24px; }
.meta { color: var(--muted); font-size: .95rem; }
.notice-banner {
  background: var(--green-soft); border-left: 4px solid var(--green);
  padding: 12px 16px; border-radius: 4px;
}
.cards {
  list-style: none; padding: 0; display: grid; gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.cards li { border: 1px solid var(--line); border-radius: 8px; padding: 14px 16px; background: var(--bg-alt); }
.cards strong { display: block; color: var(--blue-dark); margin-bottom: 4px; }

.site-footer {
  border-top: 1px solid var(--line); background: var(--bg-alt);
  padding: 24px 0; font-size: .92rem; color: var(--muted);
}
.site-footer .notice { color: var(--ink); }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 16px; }