:root {
  --ink: #17202a;
  --muted: #596673;
  --line: #dfe8ee;
  --soft: #eef9fc;
  --blue: #1589d2;
  --cyan: #16b9c4;
  --orange: #ff7a30;
  --white: #fff;
  --shadow: 0 18px 48px rgba(29, 74, 102, .1);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Noto Sans JP", system-ui, sans-serif;
  line-height: 1.8;
}
a { color: inherit; }
img { max-width: 100%; height: auto; }
.wrap { width: min(1120px, calc(100% - 40px)); margin-inline: auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(223, 232, 238, .85);
  background: rgba(255, 255, 255, .95);
  backdrop-filter: blur(14px);
}
.header-inner { min-height: 72px; display: flex; align-items: center; gap: 28px; }
.logo { margin-right: auto; text-decoration: none; font-size: 1.35rem; font-weight: 900; letter-spacing: -.04em; }
.logo span { color: var(--blue); }
.main-nav { display: flex; flex-wrap: wrap; align-items: center; gap: 20px; }
.main-nav a { text-decoration: none; font-size: .9rem; font-weight: 700; }
.main-nav .nav-cta { padding: 9px 15px; border-radius: 999px; color: var(--white); background: linear-gradient(120deg, var(--cyan), var(--blue)); }
.hero { padding: 88px 0 72px; background: linear-gradient(145deg, #f2fbfd 0%, #fff 55%, #fff4ed 100%); }
.eyebrow { margin: 0 0 12px; color: var(--blue); font-weight: 900; letter-spacing: .09em; }
h1, h2, h3 { line-height: 1.42; text-wrap: balance; }
h1 { max-width: 900px; margin: 0; font-size: clamp(2.15rem, 5vw, 4.1rem); letter-spacing: -.055em; }
.hero-lead { max-width: 760px; margin: 24px 0 0; color: var(--muted); font-size: 1.08rem; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 11px 22px; border: 2px solid var(--blue); border-radius: 999px; text-decoration: none; font-weight: 900; }
.button.primary { border-color: transparent; color: var(--white); background: linear-gradient(120deg, var(--cyan), var(--blue)); box-shadow: 0 10px 24px rgba(21, 137, 210, .22); }
.button.secondary { color: var(--blue); background: var(--white); }
.facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 42px; }
.fact { padding: 18px 20px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.82); }
.fact strong { display: block; font-size: 1.05rem; }
.fact span { color: var(--muted); font-size: .9rem; }
.section { padding: 78px 0; }
.section.alt { background: var(--soft); }
.section-head { max-width: 760px; margin-bottom: 34px; }
.section-head h2 { margin: 0 0 12px; font-size: clamp(1.75rem, 3vw, 2.65rem); letter-spacing: -.035em; }
.section-head p { margin: 0; color: var(--muted); }
.answer { margin: 0 0 38px; padding: 24px 26px; border-left: 5px solid var(--cyan); border-radius: 0 18px 18px 0; background: #f3fbfc; }
.answer strong { display: block; margin-bottom: 4px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid.two { grid-template-columns: repeat(2, 1fr); }
.card { padding: 26px; border: 1px solid var(--line); border-radius: 22px; background: var(--white); box-shadow: var(--shadow); }
.card h3 { margin: 0 0 10px; font-size: 1.2rem; }
.card p { margin: 0; color: var(--muted); }
.card ul { margin: 14px 0 0; padding-left: 1.2em; }
.card-link { display: block; text-decoration: none; transition: transform .18s ease, box-shadow .18s ease; }
.card-link:hover { transform: translateY(-3px); box-shadow: 0 22px 50px rgba(29, 74, 102, .16); }
.tag { display: inline-block; margin-bottom: 12px; padding: 4px 10px; border-radius: 999px; color: var(--blue); background: #eaf6fd; font-size: .78rem; font-weight: 900; }
.steps { counter-reset: step; display: grid; gap: 16px; }
.step { position: relative; padding: 24px 24px 24px 74px; border: 1px solid var(--line); border-radius: 18px; background: var(--white); }
.step::before { counter-increment: step; content: counter(step); position: absolute; top: 22px; left: 22px; display: grid; place-items: center; width: 36px; height: 36px; border-radius: 50%; color: var(--white); background: var(--blue); font-weight: 900; }
.step h3 { margin: 0 0 4px; }
.step p { margin: 0; color: var(--muted); }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 18px; background: var(--white); }
table { width: 100%; border-collapse: collapse; min-width: 680px; }
th, td { padding: 16px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: #f4f9fb; font-size: .9rem; }
tr:last-child td { border-bottom: 0; }
.article { width: min(820px, calc(100% - 40px)); margin-inline: auto; }
.article h2 { margin-top: 58px; font-size: 1.8rem; }
.article h3 { margin-top: 36px; }
.article p, .article li { color: #34424f; }
.article .lead { font-size: 1.08rem; }
.article-nav { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin: 28px 0; padding: 20px; border: 1px solid var(--line); border-radius: 18px; background: #fbfdfe; }
.article-nav a { color: var(--blue); font-weight: 700; }
.note { padding: 18px 20px; border-radius: 16px; background: #fff4ed; color: #714326; }
.cta { padding: 54px 0; background: #152c3d; color: var(--white); }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.cta h2 { margin: 0 0 8px; font-size: clamp(1.6rem, 3vw, 2.35rem); }
.cta p { margin: 0; color: #cee0eb; }
.breadcrumbs { padding: 15px 0; color: var(--muted); font-size: .84rem; }
.breadcrumbs a { color: var(--blue); }
.site-footer { padding: 34px 0; background: #0f202d; color: #dbe8ef; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 18px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 16px; }
.footer-nav a { color: #dbe8ef; font-size: .85rem; }
.fineprint { color: var(--muted); font-size: .82rem; }
@media (max-width: 820px) {
  .main-nav { display: none; }
  .facts, .grid, .grid.two { grid-template-columns: 1fr; }
  .cta-inner { display: block; }
  .cta .actions { margin-top: 24px; }
}
@media (max-width: 540px) {
  .wrap, .article { width: min(100% - 28px, 1120px); }
  .hero { padding: 58px 0 50px; }
  .section { padding: 58px 0; }
  .actions { flex-direction: column; }
  .button { width: 100%; }
  .article-nav { grid-template-columns: 1fr; }
}