:root {
  --detail-blue: #002fa7;
  --detail-ink: #101522;
  --detail-muted: #5b6474;
  --detail-line: #dfe3eb;
  --detail-soft: #f7f7f8;
}

.detail-page {
  background: #fff;
}

.detail-page .navbar {
  border-bottom: 1px solid var(--detail-line);
  box-shadow: none;
}

.detail-page .btn-blue {
  background: var(--detail-blue);
  border-color: var(--detail-blue);
}

.detail-hero {
  padding: 58px 0 44px;
  background: #fff;
  border-bottom: 1px solid var(--detail-line);
}

.detail-breadcrumb {
  margin-bottom: 28px;
  color: var(--detail-muted);
  font-size: .82rem;
}

.detail-breadcrumb a {
  color: var(--detail-blue);
}

.detail-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(380px, .82fr);
  gap: 64px;
  align-items: end;
}

.detail-kicker {
  display: block;
  margin-bottom: 14px;
  color: var(--detail-blue);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .1em;
}

.detail-title {
  max-width: 680px;
  margin: 0;
  color: var(--detail-ink);
  font-size: clamp(2.4rem, 5.2vw, 4.8rem);
  line-height: .98;
  letter-spacing: -.055em;
}

.detail-summary {
  max-width: 650px;
  margin: 24px 0 0;
  color: var(--detail-muted);
  font-size: 1rem;
  line-height: 1.85;
}

.detail-actions {
  display: flex;
  gap: 12px;
  margin-top: 30px;
  flex-wrap: wrap;
}

.detail-back-link {
  display: inline-flex;
  align-items: center;
  padding: 10px 18px;
  border: 1px solid var(--detail-line);
  color: var(--detail-ink);
  font-size: .9rem;
  font-weight: 700;
}

.detail-back-link:hover {
  border-color: var(--detail-blue);
  color: var(--detail-blue);
}

.detail-visual {
  margin: 0;
  border-left: 1px solid var(--detail-line);
  padding-left: 24px;
}

.detail-visual img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}

.detail-visual figcaption {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-top: 10px;
  color: var(--detail-muted);
  font-size: .76rem;
  border-top: 1px solid var(--detail-line);
}

.detail-facts {
  background: var(--detail-soft);
  border-bottom: 1px solid var(--detail-line);
}

.detail-facts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.detail-fact {
  min-height: 126px;
  padding: 26px 28px;
  border-left: 1px solid var(--detail-line);
}

.detail-fact:last-child {
  border-right: 1px solid var(--detail-line);
}

.detail-fact-label {
  display: block;
  margin-bottom: 10px;
  color: var(--detail-muted);
  font-size: .75rem;
  font-weight: 700;
}

.detail-fact-value {
  color: var(--detail-ink);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.55;
}

.detail-main {
  padding: 72px 0 86px;
}

.detail-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 72px;
  align-items: start;
}

.detail-nav {
  position: sticky;
  top: 106px;
  border-top: 3px solid var(--detail-blue);
}

.detail-nav-title {
  padding: 16px 0;
  border-bottom: 1px solid var(--detail-line);
  color: var(--detail-ink);
  font-size: .82rem;
  font-weight: 700;
}

.detail-nav a {
  display: block;
  padding: 11px 0;
  border-bottom: 1px solid var(--detail-line);
  color: var(--detail-muted);
  font-size: .82rem;
}

.detail-nav a:hover {
  color: var(--detail-blue);
}

.detail-section {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr);
  gap: 28px;
  padding: 0 0 58px;
  margin-bottom: 58px;
  border-bottom: 1px solid var(--detail-line);
  scroll-margin-top: 120px;
}

.detail-section:last-child {
  margin-bottom: 0;
}

.detail-section-number {
  color: var(--detail-blue);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.detail-section h2 {
  margin: 0 0 20px;
  color: var(--detail-ink);
  font-size: clamp(1.6rem, 3vw, 2.25rem);
  line-height: 1.2;
  letter-spacing: -.025em;
}

.detail-section p {
  max-width: 760px;
  margin: 0 0 14px;
  color: var(--detail-muted);
  font-size: .95rem;
  line-height: 1.9;
}

.detail-option-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 26px;
  border-top: 1px solid var(--detail-line);
  border-left: 1px solid var(--detail-line);
}

.detail-option {
  min-height: 178px;
  padding: 24px;
  border-right: 1px solid var(--detail-line);
  border-bottom: 1px solid var(--detail-line);
}

.detail-option h3 {
  margin: 0 0 10px;
  color: var(--detail-ink);
  font-size: 1rem;
}

.detail-option p {
  margin: 0;
  font-size: .86rem;
  line-height: 1.75;
}

.detail-process {
  margin-top: 24px;
  border-top: 1px solid var(--detail-line);
}

.detail-process-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--detail-line);
}

.detail-process-step {
  color: var(--detail-blue);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.detail-process-item p {
  margin: 0;
  color: var(--detail-ink);
  line-height: 1.75;
}

.detail-checklist {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  margin-top: 24px;
  border-top: 1px solid var(--detail-line);
  border-left: 1px solid var(--detail-line);
}

.detail-checklist li {
  min-height: 92px;
  padding: 20px 22px;
  border-right: 1px solid var(--detail-line);
  border-bottom: 1px solid var(--detail-line);
  color: var(--detail-ink);
  font-size: .9rem;
  line-height: 1.7;
  list-style: none;
}

.detail-checklist li::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 10px;
  background: var(--detail-blue);
}

.detail-related {
  padding: 68px 0 78px;
  background: var(--detail-soft);
  border-top: 1px solid var(--detail-line);
}

.detail-related-header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 24px;
  margin-bottom: 28px;
}

.detail-related-header h2 {
  margin: 0;
  color: var(--detail-ink);
  font-size: 1.8rem;
}

.detail-related-header a {
  color: var(--detail-blue);
  font-size: .86rem;
  font-weight: 700;
}

.detail-related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--detail-line);
  border-left: 1px solid var(--detail-line);
}

.detail-related-card {
  display: block;
  padding: 16px;
  border-right: 1px solid var(--detail-line);
  border-bottom: 1px solid var(--detail-line);
  background: #fff;
  color: var(--detail-ink);
}

.detail-related-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  margin-bottom: 16px;
}

.detail-related-card span {
  color: var(--detail-blue);
  font-size: .72rem;
  font-weight: 700;
}

.detail-related-card h3 {
  margin: 6px 0 0;
  font-size: 1rem;
}

.detail-final-cta {
  padding: 42px 0;
  background: var(--detail-blue);
  color: #fff;
}

.detail-final-cta .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.detail-final-cta h2 {
  margin: 0 0 6px;
  font-size: 1.55rem;
}

.detail-final-cta p {
  margin: 0;
  color: rgba(255,255,255,.78);
  font-size: .88rem;
}

.detail-final-cta .btn {
  flex-shrink: 0;
  background: #fff;
  color: var(--detail-blue);
  border-color: #fff;
}

@media (max-width: 900px) {
  .detail-hero-grid,
  .detail-layout {
    grid-template-columns: 1fr;
    gap: 38px;
  }

  .detail-visual {
    padding: 18px 0 0;
    border-left: 0;
    border-top: 1px solid var(--detail-line);
  }

  .detail-nav {
    position: static;
    display: flex;
    overflow-x: auto;
    border-top-width: 2px;
  }

  .detail-nav-title {
    display: none;
  }

  .detail-nav a {
    flex: 0 0 auto;
    padding: 12px 18px 12px 0;
    margin-right: 18px;
  }

  .detail-option-grid,
  .detail-related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .detail-hero {
    padding: 38px 0 30px;
  }

  .detail-hero-grid {
    gap: 30px;
  }

  .detail-title {
    font-size: 2.65rem;
  }

  .detail-facts-grid,
  .detail-option-grid,
  .detail-checklist,
  .detail-related-grid {
    grid-template-columns: 1fr;
  }

  .detail-fact {
    min-height: auto;
    border-right: 1px solid var(--detail-line);
    border-bottom: 1px solid var(--detail-line);
  }

  .detail-main {
    padding: 48px 0 58px;
  }

  .detail-section {
    grid-template-columns: 1fr;
    gap: 16px;
    padding-bottom: 42px;
    margin-bottom: 42px;
  }

  .detail-section-number {
    font-size: 1rem;
  }

  .detail-option {
    min-height: auto;
  }

  .detail-related-header,
  .detail-final-cta .container {
    align-items: flex-start;
    flex-direction: column;
  }
}