:root {
  --navy: #142542;
  --navy-2: #1a2b4a;
  --ink: #13213a;
  --muted: #68758a;
  --line: #dce4ee;
  --gold: #d7a936;
  --gold-dark: #ad7712;
  --pale: #f3f7fb;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Noto Sans JP", sans-serif;
  font-size: clamp(16px, 1rem, 19px);
  line-height: 1.9;
  color: var(--ink);
  background: #fff;
}
a { color: inherit; }
.site-header { border-bottom: 1px solid var(--line); background: #fff; }
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1080px; margin-inline: auto; padding: 18px 24px;
}
.logo { text-decoration: none; font-weight: 700; font-size: clamp(17px, 1.1rem, 21px); letter-spacing: -.02em; }
.header-nav { display: flex; gap: 18px; align-items: center; font-size: clamp(13px, .85rem, 15px); font-weight: 600; }
.header-nav a { text-decoration: none; color: var(--navy-2); }
.header-nav .nav-cta {
  padding: 8px 18px; border-radius: 8px; color: #142542;
  background: linear-gradient(112deg, #d9a93c 0%, #f2ce70 50%, #d6a336 100%);
}
.wrap { max-width: 760px; margin-inline: auto; padding: 48px 24px 80px; }
.breadcrumb { font-size: 13px; color: var(--muted); margin-bottom: 28px; }
.breadcrumb a { color: var(--muted); }
article h1 { font-size: clamp(26px, 4.4vw, 38px); line-height: 1.45; letter-spacing: -.02em; margin: 0 0 12px; color: #0e2349; }
.article-meta { font-size: 13px; color: var(--muted); margin-bottom: 36px; }
article h2 {
  font-size: clamp(20px, 2.8vw, 26px); line-height: 1.5; margin: 52px 0 16px;
  padding-left: 14px; border-left: 4px solid var(--gold); color: #0e2349;
}
article h3 { font-size: clamp(17px, 1.1rem, 20px); margin: 36px 0 10px; color: #0e2349; }
article p { margin: 0 0 22px; }
article ul, article ol { margin: 0 0 22px; padding-left: 24px; }
article li { margin-bottom: 8px; }
article strong { color: #0e2349; }
.point-box {
  background: var(--pale); border: 1px solid var(--line); border-radius: 14px;
  padding: 20px 24px; margin: 0 0 28px; font-size: .95em;
}
.cta-box {
  margin-top: 64px; padding: 36px 28px; border-radius: 18px; text-align: center;
  background: linear-gradient(135deg, #10203f, #1c3054); color: #fff;
}
.cta-box p.cta-title { font-size: clamp(19px, 1.3rem, 24px); font-weight: 700; margin: 0 0 8px; }
.cta-box p.cta-sub { font-size: clamp(14px, .9rem, 16px); color: #cfd9e8; margin: 0 0 24px; }
.cta-box a.cta-btn {
  display: inline-block; padding: 16px 40px; border-radius: 12px; text-decoration: none;
  color: #142542; font-weight: 800; font-size: clamp(16px, 1.05rem, 19px);
  background: linear-gradient(112deg, #b98217 0%, #f2ce70 40%, #fff0ad 55%, #d6a336 100%);
  box-shadow: 0 14px 34px rgba(185, 130, 23, .35);
}
.article-list { list-style: none; padding: 0; margin: 0; }
.article-list li { border-bottom: 1px solid var(--line); }
.article-list a {
  display: block; padding: 24px 4px; text-decoration: none;
}
.article-list .list-title { font-size: clamp(17px, 1.15rem, 21px); font-weight: 700; color: #0e2349; margin: 0 0 6px; }
.article-list .list-desc { font-size: clamp(13px, .88rem, 15px); color: var(--muted); margin: 0; }
.site-footer { border-top: 1px solid var(--line); margin-top: 40px; }
.footer-inner {
  max-width: 1080px; margin-inline: auto; padding: 28px 24px;
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: 13px; color: var(--muted);
}
.footer-inner a { color: var(--muted); }
@media (max-width: 560px) {
  .header-nav { gap: 12px; }
  .header-nav .nav-plain { display: none; }
}