.page-about {
  --about-hero-title-size: clamp(2.25rem, 5vw, 3.5rem);
  --about-gap: clamp(2rem, 6vw, 5rem);
  background: var(--blue);
  color: var(--moon);
  overflow-x: hidden;
  font-family: var(--font-body);
}

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: var(--space-4) var(--space-4) 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--mist);
}

.page-about .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-about .breadcrumb a:hover {
  color: var(--gold);
}

.page-about .breadcrumb-separator {
  color: var(--gold);
}

.page-about .breadcrumb-current {
  color: var(--light-gold);
}

.page-about .about-hero {
  position: relative;
  background: linear-gradient(135deg, var(--blue) 45%, #1a2c4a 100%);
  border-bottom: 1px solid rgba(143, 166, 191, 0.25);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -10%;
  width: 55%;
  height: 140%;
  background: var(--indigo);
  clip-path: polygon(18% 0, 100% 0, 100% 100%, 0 100%);
  opacity: 0.75;
  z-index: 0;
}

.page-about .about-hero::after {
  content: "01";
  position: absolute;
  right: 4%;
  bottom: -12%;
  font-family: var(--font-mono);
  font-size: 14rem;
  font-weight: 700;
  color: rgba(212, 180, 74, 0.05);
  line-height: 1;
  z-index: 0;
  pointer-events: none;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: var(--space-6) var(--space-4) var(--space-7);
}

.page-about .about-hero-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-4);
}

.page-about .about-hero-kicker {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.25em;
  color: var(--gold);
  text-transform: uppercase;
  border-left: 2px solid var(--gold);
  padding-left: var(--space-3);
  margin: 0;
}

.page-about .about-hero-title {
  font-family: var(--font-heading);
  font-size: var(--about-hero-title-size);
  line-height: 1.18;
  color: var(--moon);
  margin: 0;
  font-weight: 700;
}

.page-about .about-hero-lead {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  line-height: 1.4;
  color: var(--light-gold);
  margin: 0;
}

.page-about .about-hero-desc {
  font-size: var(--text-base);
  line-height: 1.8;
  color: rgba(242, 240, 232, 0.82);
  max-width: 36em;
  margin: 0;
}

.page-about .about-hero-desc strong {
  color: var(--gold);
  font-weight: 600;
}

.page-about .about-hero-figure {
  position: relative;
  border: 1px solid var(--gold);
  background: var(--indigo);
}

.page-about .about-hero-figure::before {
  content: "";
  position: absolute;
  top: 12px;
  left: 12px;
  width: 18px;
  height: 18px;
  border-top: 2px solid var(--gold);
  border-left: 2px solid var(--gold);
  z-index: 2;
}

.page-about .about-hero-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, rgba(143, 166, 191, 0.12) 0 1px, transparent 1px 40px),
    repeating-linear-gradient(90deg, rgba(143, 166, 191, 0.12) 0 1px, transparent 1px 40px);
  pointer-events: none;
  z-index: 1;
}

.page-about .about-hero-figure img {
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  display: block;
}

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-5);
  max-width: var(--container-wide);
  margin: 0 auto;
}

.page-about .about-main {
  min-width: 0;
}

.page-about .about-sidebar {
  display: none;
}

.page-about .about-section {
  position: relative;
  padding: var(--space-6) var(--space-4);
  border-top: 1px solid rgba(143, 166, 191, 0.22);
  scroll-margin-top: calc(var(--header-height) + 16px);
}

.page-about .about-section .section-head {
  margin-bottom: var(--space-5);
}

.page-about .about-section .section-title {
  color: var(--moon);
  margin: var(--space-2) 0 0;
}

.page-about .about-section .section-subtitle {
  color: var(--mist);
  margin: var(--space-2) 0 0;
  line-height: 1.6;
}

.page-about .about-position-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
}

.page-about .about-position-grid .card {
  border: 1px solid rgba(212, 180, 74, 0.25);
  border-radius: 0;
}

.page-about .about-position-grid .card-title {
  color: var(--light-gold);
}

.page-about .about-note {
  margin-top: var(--space-5);
  padding: var(--space-4);
  border-left: 2px solid var(--gold);
  background: rgba(43, 30, 75, 0.4);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--light-gold);
}

.page-about .about-section-history {
  background: linear-gradient(180deg, var(--indigo) 0%, #241843 100%);
  padding: 0 0 var(--space-7);
}

.page-about .about-section-history > img {
  width: 100%;
  max-width: 100%;
  height: 160px;
  object-fit: cover;
  display: block;
  opacity: 0.7;
}

.page-about .about-section-history .section-head {
  padding: var(--space-6) var(--space-4) 0;
  max-width: 720px;
  margin-bottom: var(--space-6);
}

.page-about .about-timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  max-width: 680px;
  padding: var(--space-6) var(--space-4) 0 48px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 4px;
  bottom: 4px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), rgba(212, 180, 74, 0.15));
}

.page-about .about-timeline-item {
  position: relative;
}

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: -38px;
  top: 4px;
  width: 10px;
  height: 10px;
  background: var(--gold);
  transform: rotate(45deg);
}

.page-about .about-timeline-item.about-timeline-current::before {
  background: var(--wine);
  box-shadow: 0 0 0 3px rgba(212, 180, 74, 0.45);
  width: 14px;
  height: 14px;
  left: -40px;
  top: 2px;
}

.page-about .about-timeline-year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--gold);
  margin-bottom: var(--space-2);
}

.page-about .about-timeline-current .about-timeline-year {
  color: var(--light-gold);
}

.page-about .about-timeline-card {
  background: rgba(10, 26, 47, 0.55);
  border: 1px solid rgba(143, 166, 191, 0.3);
  padding: var(--space-4);
  border-radius: 0;
}

.page-about .about-timeline-current .about-timeline-card {
  border-color: var(--gold);
  background: rgba(122, 30, 60, 0.25);
}

.page-about .about-timeline-title {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  margin: 0 0 var(--space-2);
  color: var(--moon);
}

.page-about .about-timeline-text {
  font-size: var(--text-base);
  line-height: 1.7;
  color: rgba(242, 240, 232, 0.78);
  margin: 0 0 var(--space-2);
}

.page-about .about-timeline-text:last-child {
  margin-bottom: 0;
}

.page-about .about-section-service {
  background: var(--moon);
  color: var(--ink);
  padding: var(--space-7) var(--space-4);
  border-top: 1px solid var(--gold);
}

.page-about .about-section-service .section-index {
  color: var(--wine);
}

.page-about .about-section-service .section-title {
  color: var(--ink);
}

.page-about .about-section-service .section-subtitle {
  color: var(--mist);
}

.page-about .about-section-service .section-head,
.page-about .about-section-service .about-stats,
.page-about .about-section-service .about-service-grid,
.page-about .about-section-service .about-service-foot {
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  background: var(--blue);
  color: var(--moon);
  padding: var(--space-4) var(--space-3);
  border-left: 2px solid var(--gold);
}

.page-about .about-stat-num {
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--gold);
  line-height: 1.1;
}

.page-about .about-stat-label {
  font-size: var(--text-sm);
  color: rgba(242, 240, 232, 0.75);
}

.page-about .about-service-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-6);
}

.page-about .about-nav-catalog .legend {
  height: 100%;
  border: 1px solid var(--gold);
  border-radius: 0;
}

.page-about .about-catalog-list {
  list-style: none;
  margin: 0;
  padding: var(--space-4);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
}

.page-about .about-catalog-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  font-size: var(--text-base);
  border: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.page-about .about-catalog-item:hover {
  border-color: rgba(212, 180, 74, 0.5);
}

.page-about .about-service-detail {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
}

.page-about .about-service-detail .card {
  border-radius: 0;
  border: 1px solid var(--gold);
  background: var(--blue);
}

.page-about .about-service-detail .card-title {
  color: var(--light-gold);
}

.page-about .about-service-foot {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--mist);
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid rgba(51, 58, 69, 0.15);
}

.page-about .about-service-foot a {
  color: var(--wine);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-service-foot a:hover {
  color: var(--gold);
}

.page-about .about-section-credential {
  background: var(--blue);
  overflow: hidden;
  padding: var(--space-7) var(--space-4);
}

.page-about .about-section-credential > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.12;
  z-index: 0;
}

.page-about .about-section-credential .section-head,
.page-about .about-credential-grid {
  position: relative;
  z-index: 1;
}

.page-about .about-section-credential .section-head {
  max-width: 680px;
}

.page-about .about-credential-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.page-about .about-credential-card {
  border: 1px solid var(--gold);
  border-radius: 0;
  background: var(--moon);
  color: var(--ink);
}

.page-about .about-credential-card .card-title {
  color: var(--blue);
  border-bottom: 1px solid var(--gold);
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-3);
}

.page-about .about-credential-id {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--wine);
}

.page-about .about-trust {
  max-width: 640px;
  margin: 0 auto;
  padding: var(--space-6) var(--space-4);
  text-align: center;
  color: var(--mist);
  font-size: var(--text-sm);
  line-height: 1.8;
  border-top: 1px solid var(--gold);
}

.page-about .about-trust p {
  margin: 0 0 var(--space-2);
}

.page-about .about-trust a {
  color: var(--gold);
}

@media (min-width: 760px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
    gap: var(--space-7);
    padding: var(--space-8) var(--space-6) var(--space-9);
  }

  .page-about .about-hero-desc {
    font-size: var(--text-lg);
  }

  .page-about .about-section-history > img {
    height: 240px;
  }

  .page-about .about-position-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-5);
  }

  .page-about .about-service-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
  }

  .page-about .about-catalog-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: var(--space-7);
    align-items: start;
    padding: var(--space-7) var(--space-6) 0;
  }

  .page-about .about-sidebar {
    display: block;
    position: sticky;
    top: calc(var(--header-height) + 24px);
  }

  .page-about .about-legend {
    border: 1px solid var(--star-line);
    padding: var(--space-4);
  }

  .page-about .about-chapter-nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
  }

  .page-about .about-chapter-nav .legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2);
    font-size: var(--text-sm);
    color: var(--mist);
    text-decoration: none;
    border-left: 2px solid transparent;
    transition: all 0.2s ease;
  }

  .page-about .about-chapter-nav .legend-item:hover,
  .page-about .about-chapter-nav .legend-item[aria-current="true"] {
    color: var(--gold);
    border-left-color: var(--gold);
    background: rgba(212, 180, 74, 0.06);
  }

  .page-about .about-chapter-num {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--gold);
  }

  .page-about .about-section,
  .page-about .about-section-service,
  .page-about .about-section-credential {
    padding-left: 0;
    padding-right: 0;
  }

  .page-about .about-section-history {
    padding-left: 0;
    padding-right: 0;
  }

  .page-about .about-section-history .section-head {
    padding-left: 0;
    padding-right: 0;
  }

  .page-about .about-timeline {
    padding-right: 0;
  }

  .page-about .about-credential-grid {
    gap: var(--space-5);
  }
}