:root {
  --navy: #12375d;
  --blue: #1d5f99;
  --mist: #eef4f8;
  --ink: #1f2933;
  --muted: #5b6b7a;
  --line: #d9e2ea;
  --white: #ffffff;
}

* { box-sizing: border-box; }
html { color: var(--ink); font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif; line-height: 1.75; }
body { margin: 0; background: var(--white); }
a { color: inherit; }
.content, .header-inner { width: min(100% - 40px, 1040px); margin: 0 auto; }

.site-header { border-top: 5px solid var(--blue); background: var(--white); }
.header-inner { min-height: 106px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 16px; text-decoration: none; }
.brand-mark { padding: 5px 11px; background: var(--navy); color: var(--white); font-size: 1.3rem; font-weight: 800; letter-spacing: .05em; line-height: 1.2; }
.brand-name { color: var(--navy); font-size: .92rem; font-weight: 700; line-height: 1.45; }
.brand-en { margin: 0; color: var(--muted); font-size: .8rem; letter-spacing: .04em; text-align: right; }

.hero { background: linear-gradient(125deg, #12375d 0%, #1d5f99 72%, #2d77ae 100%); color: var(--white); }
.hero .content { padding: 78px 0 84px; }
.eyebrow { margin: 0 0 10px; color: var(--blue); font-size: .78rem; font-weight: 800; letter-spacing: .14em; }
.hero .eyebrow { color: #b7d8ee; }
h1, h2 { margin: 0; line-height: 1.4; }
h1 { max-width: 730px; font-size: clamp(1.8rem, 4vw, 2.9rem); letter-spacing: .04em; }
.hero p:last-child { max-width: 770px; margin: 25px 0 0; font-size: 1rem; }

.section { padding: 68px 0; }
.section-heading { margin-bottom: 26px; }
h2 { color: var(--navy); font-size: clamp(1.45rem, 2vw, 1.8rem); }
.prose { max-width: 850px; font-size: 1rem; }
.prose p { margin: 0; }

.news-section { background: var(--mist); }
.news-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.news-list li { display: flex; gap: 32px; padding: 18px 8px; border-bottom: 1px solid var(--line); }
.news-list time { flex: 0 0 100px; color: var(--blue); font-variant-numeric: tabular-nums; font-weight: 700; }

.links { padding-bottom: 84px; }
.link-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.link-grid a { min-height: 112px; display: flex; flex-direction: column; justify-content: center; padding: 20px 52px 20px 24px; background: var(--white); border: 1px solid var(--line); color: var(--navy); font-weight: 800; text-decoration: none; position: relative; transition: background .15s ease, border-color .15s ease; }
.link-grid a::after { content: "›"; position: absolute; right: 22px; top: 50%; color: var(--blue); font-size: 1.8rem; font-weight: 400; transform: translateY(-53%); }
.link-grid a:hover { border-color: var(--blue); background: #f6fbfe; }
.link-grid span { display: block; margin-top: 3px; color: var(--muted); font-size: .84rem; font-weight: 400; }

.site-footer { padding: 31px 0; background: #102a43; color: #d9e7f1; }
.footer-name, .copyright { margin: 0; }
.footer-name { font-size: .88rem; font-weight: 700; }
.copyright { margin-top: 6px; font-size: .75rem; }

@media (max-width: 650px) {
  .content, .header-inner { width: min(100% - 32px, 1040px); }
  .header-inner { min-height: 92px; }
  .brand-en { display: none; }
  .hero .content { padding: 58px 0 64px; }
  .section { padding: 52px 0; }
  .news-list li { display: block; padding: 17px 0; }
  .news-list time { display: block; margin-bottom: 3px; }
  .link-grid { grid-template-columns: 1fr; }
}