:root {
  --navy: #0b2447;
  --navy-light: #163a6e;
  --teal: #0aa693;
  --teal-ink: #06695e;
  --teal-light: #e6f7f5;
  --gold: #c9a84c;
  --white: #fff;
  --off-white: #f7f9fb;
  --text: #1a1a2e;
  --gray: #5a616e;
  --line: #e2e7ee;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 17px; }
body { font-family: "Noto Sans JP", sans-serif; color: var(--text); background: var(--white); line-height: 1.9; -webkit-font-smoothing: antialiased; }
img { display: block; width: 100%; }
a { color: inherit; }
.container { width: min(100% - 40px, 1100px); margin: 0 auto; }
.skip { position: absolute; left: -9999px; top: 0; z-index: 20; padding: 10px 16px; background: var(--navy); color: #fff; }
.skip:focus { left: 0; }

.header { background: var(--navy); color: #fff; }
.header-inner { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { font-family: "Shippori Mincho", serif; font-size: 1.1rem; font-weight: 700; text-decoration: none; letter-spacing: .04em; }
.brand small { display: block; font-family: "Noto Sans JP", sans-serif; font-size: .65rem; font-weight: 400; opacity: .78; }
.nav { display: flex; align-items: center; gap: 24px; font-size: .88rem; }
.nav a { text-decoration: none; }
.nav a:hover { color: #7ce1d5; }

.blog-hero { padding: 92px 0 86px; color: #fff; background: linear-gradient(135deg, rgba(11,36,71,.98), rgba(11,36,71,.82)), url('../photo_09.webp') center/cover; }
.blog-hero .eyebrow, .article-hero .eyebrow { display: block; margin-bottom: 12px; color: #7ce1d5; font-weight: 700; font-size: .78rem; letter-spacing: .16em; }
.blog-hero h1, .article-hero h1 { font-family: "Shippori Mincho", serif; line-height: 1.45; letter-spacing: .03em; }
.blog-hero h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); }
.blog-hero p { max-width: 720px; margin-top: 18px; color: rgba(255,255,255,.88); }

.blog-list { padding: 82px 0 96px; background: var(--off-white); }
.section-head { margin-bottom: 34px; }
.section-head h2 { font-family: "Shippori Mincho", serif; color: var(--navy); font-size: clamp(1.7rem, 3vw, 2.2rem); }
.section-head p { color: var(--gray); margin-top: 8px; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card { display: flex; flex-direction: column; overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: 10px; text-decoration: none; box-shadow: 0 10px 30px rgba(11,36,71,.06); transition: transform .2s ease, box-shadow .2s ease; }
.card:hover { transform: translateY(-4px); box-shadow: 0 16px 38px rgba(11,36,71,.12); }
.card img { height: 210px; object-fit: cover; }
.card-body { padding: 26px 24px 28px; }
.card-meta { color: var(--teal-ink); font-size: .78rem; font-weight: 700; letter-spacing: .08em; }
.card h2 { margin-top: 10px; color: var(--navy); font-family: "Shippori Mincho", serif; font-size: 1.3rem; line-height: 1.6; }
.card p { margin-top: 12px; color: var(--gray); font-size: .92rem; }
.card-more { display: inline-block; margin-top: 16px; color: var(--teal-ink); font-weight: 700; font-size: .88rem; }
.editorial-note { padding: 64px 0; background: var(--white); }
.note-box { padding: 28px 30px; border-left: 4px solid var(--teal); background: var(--teal-light); }
.note-box h2 { color: var(--navy); font-size: 1.2rem; }
.note-box p { margin-top: 8px; color: #39424f; }

.article-hero { padding: 74px 0 68px; color: #fff; background: linear-gradient(135deg, rgba(11,36,71,.98), rgba(11,36,71,.82)); }
.article-hero-inner { max-width: 850px; }
.article-hero h1 { font-size: clamp(2rem, 4.7vw, 3rem); }
.article-lead { margin-top: 20px; max-width: 760px; color: rgba(255,255,255,.9); font-size: 1.04rem; }
.article-meta { display: flex; flex-wrap: wrap; gap: 12px 22px; margin-top: 24px; color: rgba(255,255,255,.76); font-size: .82rem; }
.breadcrumb { padding: 15px 0; border-bottom: 1px solid var(--line); color: var(--gray); font-size: .8rem; }
.breadcrumb a { color: var(--teal-ink); }

.article-wrap { width: min(100% - 40px, 820px); margin: 0 auto; padding: 64px 0 88px; }
.article-body h2 { margin: 56px 0 18px; color: var(--navy); font-family: "Shippori Mincho", serif; font-size: 1.65rem; line-height: 1.55; border-bottom: 2px solid var(--teal); padding-bottom: 12px; }
.article-body h3 { margin: 32px 0 12px; color: var(--navy); font-size: 1.14rem; }
.article-body p + p { margin-top: 18px; }
.article-body ul, .article-body ol { margin: 18px 0 18px 1.35em; }
.article-body li + li { margin-top: 8px; }
.summary { margin-bottom: 42px; padding: 28px 30px; background: var(--teal-light); border-radius: 10px; }
.summary h2 { margin: 0 0 14px; padding: 0; border: 0; font-family: "Noto Sans JP", sans-serif; font-size: 1.15rem; }
.summary ul { margin-bottom: 0; }
.caution { margin: 30px 0; padding: 24px 26px; border: 1px solid #dfc77f; background: #fffaf0; border-radius: 8px; }
.caution strong { display: block; color: var(--navy); margin-bottom: 6px; }
.source-list { padding: 24px 26px; background: var(--off-white); border-radius: 8px; font-size: .9rem; }
.source-list a { color: var(--teal-ink); }
.source-list li + li { margin-top: 10px; }
.related { padding: 64px 0 76px; background: var(--off-white); }
.related h2 { color: var(--navy); font-family: "Shippori Mincho", serif; margin-bottom: 24px; }
.related-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.related-card { padding: 22px 24px; background: #fff; border: 1px solid var(--line); border-radius: 8px; text-decoration: none; }
.related-card small { color: var(--teal-ink); font-weight: 700; }
.related-card strong { display: block; margin-top: 7px; color: var(--navy); }

.footer { padding: 48px 0 30px; background: #071a34; color: rgba(255,255,255,.78); }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 40px; }
.footer strong { color: #fff; font-family: "Shippori Mincho", serif; font-size: 1.08rem; }
.footer a { color: #fff; }
.footer-links { display: grid; gap: 7px; }
.copyright { margin-top: 30px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.12); font-size: .76rem; }

@media (max-width: 820px) {
  .cards { grid-template-columns: 1fr; }
  .card { display: grid; grid-template-columns: 220px 1fr; }
  .card img { height: 100%; min-height: 220px; }
  .nav { gap: 14px; }
}

@media (max-width: 620px) {
  html { font-size: 16px; }
  .container, .article-wrap { width: min(100% - 30px, 1100px); }
  .header-inner { min-height: 70px; }
  .nav a:first-child { display: none; }
  .blog-hero, .article-hero { padding: 62px 0 58px; }
  .blog-list { padding: 60px 0 70px; }
  .card { display: block; }
  .card img { height: 200px; }
  .article-wrap { padding: 48px 0 66px; }
  .article-body h2 { margin-top: 44px; font-size: 1.45rem; }
  .summary, .caution, .note-box { padding: 22px 20px; }
  .related-grid, .footer-grid { grid-template-columns: 1fr; }
}