:root {
  --navy: #0b263e;
  --navy-2: #123a58;
  --ink: #17232e;
  --muted: #5b6874;
  --line: #d8e0e6;
  --paper: #f7f8f8;
  --white: #fff;
  --accent: #f5b800;
  --accent-dark: #d99d00;
  --blue-soft: #eaf2f7;
  --warn-soft: #fff8da;
  --max: 1120px;
  --shadow: 0 18px 55px rgba(7, 31, 50, .12);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Noto Sans JP", "Yu Gothic", "Meiryo", sans-serif;
  line-height: 1.85;
}

a { color: var(--navy-2); text-underline-offset: 3px; }
a:hover { color: #1c5d86; }

.preview-bar {
  padding: 7px 18px;
  color: var(--navy);
  background: var(--accent);
  font-size: .82rem;
  font-weight: 800;
  text-align: center;
}

.site-header {
  background: var(--navy);
  color: var(--white);
}

.site-header__inner {
  width: min(var(--max), calc(100% - 40px));
  min-height: 76px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  color: var(--white);
  text-decoration: none;
  font-weight: 900;
  letter-spacing: .05em;
}

.brand small {
  display: block;
  color: #c7d5df;
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .11em;
}

.header-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 9px 17px;
  border-radius: 8px;
  color: var(--navy);
  background: var(--accent);
  font-weight: 800;
  text-decoration: none;
}

.breadcrumb {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: 14px 0;
  color: var(--muted);
  font-size: .82rem;
}

.hero {
  padding: 76px 20px 70px;
  color: var(--white);
  background:
    radial-gradient(circle at 82% 16%, rgba(245, 184, 0, .24), transparent 28%),
    linear-gradient(135deg, var(--navy), var(--navy-2));
}

.hero__inner {
  width: min(900px, 100%);
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: .82rem;
  font-weight: 900;
  letter-spacing: .12em;
}

h1, h2, h3 {
  margin-top: 0;
  line-height: 1.45;
}

h1 {
  margin-bottom: 20px;
  font-size: clamp(2rem, 5vw, 3.5rem);
  letter-spacing: .02em;
}

.hero__lead {
  max-width: 760px;
  margin: 0;
  color: #e6eef4;
  font-size: clamp(1rem, 2vw, 1.16rem);
}

.hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.hero__facts span {
  padding: 7px 12px;
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 999px;
  background: rgba(255,255,255,.08);
  font-size: .86rem;
}

main { background: var(--white); }

.section {
  padding: 72px 20px;
}

.section--soft { background: var(--paper); }

.section__inner {
  width: min(var(--max), 100%);
  margin: 0 auto;
}

.section h2 {
  position: relative;
  margin-bottom: 22px;
  padding-bottom: 15px;
  color: var(--navy);
  font-size: clamp(1.55rem, 3vw, 2.2rem);
}

.section h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 58px;
  height: 4px;
  border-radius: 999px;
  background: var(--accent);
}

.section-intro {
  max-width: 820px;
  margin-bottom: 28px;
  color: var(--muted);
}

.answer-box,
.notice {
  margin: 0 0 30px;
  padding: 22px 24px;
  border-left: 6px solid var(--accent);
  border-radius: 8px;
  background: var(--warn-soft);
}

.answer-box strong,
.notice strong {
  color: var(--navy);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.grid--two { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--white);
  box-shadow: 0 9px 30px rgba(11,38,62,.06);
}

.card__num {
  display: inline-grid;
  width: 34px;
  height: 34px;
  margin-bottom: 14px;
  place-items: center;
  border-radius: 50%;
  color: var(--navy);
  background: var(--accent);
  font-weight: 900;
}

.card h3 {
  margin-bottom: 10px;
  color: var(--navy);
  font-size: 1.15rem;
}

.card p:last-child { margin-bottom: 0; }

.card__source {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.card__source a {
  display: inline-flex;
  align-items: center;
  color: var(--navy-2);
  font-weight: 800;
  line-height: 1.55;
}

.check-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  margin: 0 0 11px;
  padding-left: 30px;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent-dark);
  font-weight: 900;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
}

.data-table th,
.data-table td {
  padding: 15px 17px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.data-table th {
  width: 27%;
  color: var(--white);
  background: var(--navy-2);
}

.steps {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.steps li {
  position: relative;
  min-height: 66px;
  padding: 18px 20px 18px 76px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--white);
  counter-increment: step;
}

.steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 18px;
  top: 17px;
  color: var(--navy);
  font-weight: 900;
  font-size: 1.25rem;
}

.faq details {
  margin-bottom: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--white);
}

.faq summary {
  padding: 18px 50px 18px 20px;
  color: var(--navy);
  cursor: pointer;
  font-weight: 800;
}

.faq details p {
  margin: 0;
  padding: 0 20px 20px;
  color: var(--muted);
}

.source-list li { margin-bottom: 9px; }

.check-groups {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.check-group {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--white);
  box-shadow: 0 9px 30px rgba(11,38,62,.06);
}

.check-group h3 {
  margin-bottom: 15px;
  color: var(--navy);
  font-size: 1.15rem;
}

.check-box-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-box-list li {
  position: relative;
  margin-bottom: 12px;
  padding-left: 31px;
}

.check-box-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .42em;
  width: 16px;
  height: 16px;
  border: 2px solid var(--navy-2);
  border-radius: 3px;
  background: var(--white);
}

.version-note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 18px 20px;
  border: 1px solid #e6d17c;
  border-radius: 10px;
  background: var(--warn-soft);
}

.version-note p { margin: 0; }

.copy-template {
  margin: 0;
  padding: 22px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: #edf5fa;
  background: var(--navy);
  font-family: "Yu Gothic", "Meiryo", sans-serif;
  line-height: 1.8;
  white-space: pre-wrap;
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.status-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--white);
}

.status-card strong {
  display: block;
  margin-bottom: 8px;
  color: var(--navy);
  font-size: 1.1rem;
}

.status-card p { margin: 0; color: var(--muted); }

.guide-links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.guide-links .related { height: 100%; }

.related {
  display: block;
  padding: 24px;
  border: 2px solid var(--navy-2);
  border-radius: 12px;
  color: var(--navy);
  background: var(--blue-soft);
  font-weight: 800;
  text-decoration: none;
}

.cta {
  padding: 62px 20px;
  color: var(--white);
  background: var(--navy);
}

.cta__inner {
  width: min(900px, 100%);
  margin: 0 auto;
  text-align: center;
}

.cta h2 {
  margin-bottom: 14px;
  font-size: clamp(1.55rem, 3vw, 2.3rem);
}

.cta p { color: #dbe7ef; }

.cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 25px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 12px 22px;
  border: 2px solid var(--accent);
  border-radius: 8px;
  color: var(--navy);
  background: var(--accent);
  font-weight: 900;
  text-decoration: none;
}

.button--ghost {
  color: var(--white);
  background: transparent;
}

.site-footer {
  padding: 30px 20px;
  color: #d3dee6;
  background: #071b2c;
  font-size: .82rem;
  text-align: center;
}

@media (max-width: 780px) {
  .site-header__inner { width: min(100% - 28px, var(--max)); }
  .brand small { display: none; }
  .header-link { min-height: 40px; padding: 7px 12px; font-size: .84rem; }
  .hero { padding: 54px 18px 50px; }
  .section { padding: 54px 18px; }
  .grid, .grid--two { grid-template-columns: 1fr; }
  .data-table, .data-table tbody, .data-table tr, .data-table th, .data-table td { display: block; width: 100%; }
  .data-table tr { margin-bottom: 12px; border: 1px solid var(--line); }
  .data-table th, .data-table td { border: 0; }
  .data-table th { padding-bottom: 10px; }
  .steps li { padding-left: 65px; }
  .check-groups, .status-grid, .guide-links { grid-template-columns: 1fr; }
}

@media (max-width: 420px) {
  body { font-size: 15px; }
  .preview-bar { font-size: .75rem; }
  .breadcrumb { width: calc(100% - 28px); }
  .card { padding: 21px; }
  .answer-box, .notice { padding: 19px; }
  .cta__actions { display: grid; }
  .button { width: 100%; }
}