.page-about {
  overflow-wrap: break-word;
  background: var(--blue-900);
  color: var(--white);
}
.page-about img {
  max-width: 100%;
  height: auto;
}
.page-about section[id] {
  scroll-margin-top: 1.5rem;
}
.page-about .breadcrumb {
  font-size: 0.85rem;
  margin-bottom: 2rem;
}
.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}
.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--blue-600);
}
.page-about .breadcrumb a {
  color: var(--slate);
  text-decoration: none;
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus {
  color: var(--orange);
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--white);
}

.page-about .about-hero {
  position: relative;
  display: grid;
  gap: 2rem;
  padding-bottom: 3rem;
  border-bottom: 4px solid var(--blue-600);
  margin-bottom: 2.5rem;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -2px;
  width: 160px;
  height: 10px;
  background: var(--orange);
  clip-path: polygon(0 0, 100% 0, 0 100%);
}
.page-about .about-hero-copy {
  position: relative;
  padding-left: 1.25rem;
  border-left: 6px solid var(--orange);
}
.page-about .about-hero-index {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate);
  margin-bottom: 1.25rem;
}
.page-about .about-hero-index::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  background: var(--orange);
  margin-right: 0.6rem;
}
.page-about .about-hero h1 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(2.1rem, 5vw, 3.5rem);
  line-height: 1.12;
  letter-spacing: 0.02em;
  color: var(--white);
  margin-bottom: 1.25rem;
}
.page-about .about-hero-lead {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--slate);
  max-width: 58ch;
}
.page-about .about-hero-figure {
  margin: 0;
}
.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  border: 4px solid var(--blue-600);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.18);
  object-fit: cover;
}
.page-about .about-hero-figure figcaption {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--slate);
  margin-top: 0.75rem;
}

.page-about .about-spy {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 3rem;
}
.page-about .about-spy a {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--slate);
  border: 2px solid var(--blue-600);
  padding: 0.35rem 0.8rem;
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}
.page-about .about-spy a:hover,
.page-about .about-spy a:focus {
  border-color: var(--orange);
  color: var(--orange);
}
.page-about .about-spy a.is-spy-active,
.page-about .about-spy a[aria-current="location"] {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--blue-900);
}

.page-about .section-head {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  border-bottom: 2px solid var(--blue-600);
  padding-bottom: 0.7rem;
  margin-bottom: 1.75rem;
}
.page-about .section-head-index {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.08em;
  color: var(--orange);
}
.page-about .section-head h2 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.8rem, 3vw, 2.25rem);
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--white);
  margin: 0;
}

.page-about .about-origin {
  margin-bottom: 4.5rem;
}
.page-about .origin-layout {
  display: grid;
  gap: 1.5rem;
}
.page-about .origin-card {
  background: var(--blue-800);
  border: 3px solid var(--blue-600);
  padding: 1.8rem 1.5rem;
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.18);
}
.page-about .origin-card h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 0.8rem;
}
.page-about .origin-card p {
  color: var(--slate);
  font-size: 0.95rem;
  line-height: 1.75;
  margin: 0;
}
.page-about .origin-card-accent {
  border-color: var(--orange);
  background: var(--blue-900);
}
.page-about .origin-card-accent p {
  color: var(--white);
}
.page-about .origin-stat-block {
  background: var(--orange);
  border: 3px solid var(--orange);
  padding: 1.8rem 1.2rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.3);
}
.page-about .origin-stat-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2rem, 4.5vw, 3rem);
  line-height: 1;
  color: var(--blue-900);
}
.page-about .origin-stat-label {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--blue-900);
  margin-top: 0.6rem;
}

.page-about .about-timeline {
  margin-bottom: 4.5rem;
  position: relative;
}
.page-about .timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .timeline-item {
  position: relative;
  margin-left: 1.2rem;
  padding-left: 3.5rem;
  padding-bottom: 2.75rem;
  border-left: 3px solid var(--blue-600);
}
.page-about .timeline-item:last-child {
  border-left-color: transparent;
  padding-bottom: 1rem;
}
.page-about .timeline-node {
  position: absolute;
  top: 0.9rem;
  left: -0.6rem;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
  z-index: 2;
}
.page-about .timeline-node::before {
  content: "";
  width: 0.95rem;
  height: 0.95rem;
  background: var(--orange);
  border: 3px solid var(--blue-900);
  box-shadow: 0 0 0 2px var(--orange);
}
.page-about .timeline-node span {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.7rem;
  color: var(--white);
  background: var(--blue-700);
  border: 1px solid var(--blue-600);
  padding: 0.25rem 0.45rem;
  white-space: nowrap;
}
.page-about .timeline-card {
  background: var(--blue-800);
  border: 3px solid var(--blue-600);
  border-left: 5px solid var(--orange);
  padding: 1.5rem 1.4rem;
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.18);
}
.page-about .timeline-card h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 0.6rem;
}
.page-about .timeline-card p {
  color: var(--slate);
  font-size: 0.95rem;
  line-height: 1.75;
}
.page-about .timeline-detail {
  margin-top: 1rem;
  border: 2px solid var(--blue-600);
  background: var(--blue-900);
}
.page-about .timeline-detail summary {
  cursor: pointer;
  padding: 0.55rem 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--orange);
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  user-select: none;
}
.page-about .timeline-detail summary::-webkit-details-marker {
  display: none;
}
.page-about .timeline-detail summary::before {
  content: "[ + ]";
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--orange);
}
.page-about .timeline-detail[open] summary::before {
  content: "[ – ]";
}
.page-about .timeline-detail p {
  margin: 0;
  padding: 0 0.9rem 0.8rem;
  font-size: 0.88rem;
  line-height: 1.7;
}
.page-about .about-chart-figure {
  margin: 2rem 0 0;
  text-align: center;
}
.page-about .about-chart-figure img {
  width: 100%;
  border: 4px solid var(--blue-600);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.18);
}
.page-about .about-chart-figure figcaption {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--slate);
  margin-top: 0.75rem;
}

.page-about .about-data {
  margin-bottom: 4.5rem;
  position: relative;
}
.page-about .about-data::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -2px;
  width: 140px;
  height: 12px;
  background: var(--orange);
  clip-path: polygon(100% 0, 0 0, 100% 100%);
  opacity: 0.85;
}
.page-about .data-system-layout {
  display: grid;
  gap: 1.5rem;
}
.page-about .data-system-main {
  position: relative;
  background: var(--blue-800);
  border: 4px solid var(--blue-600);
  padding: 2.2rem 1.6rem 1.8rem;
}
.page-about .data-system-main::before {
  content: "DATA FLOW / 03";
  position: absolute;
  top: -1em;
  left: 1rem;
  background: var(--orange);
  color: var(--blue-900);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 0.3rem 0.8rem;
}
.page-about .data-system-intro {
  color: var(--slate);
  font-size: 1rem;
  line-height: 1.8;
}
.page-about .data-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin: 1.6rem 0;
}
.page-about .data-metric-item {
  background: var(--blue-900);
  border: 2px solid var(--blue-600);
  text-align: center;
  padding: 0.9rem 0.4rem;
}
.page-about .data-metric-value {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  color: var(--orange);
}
.page-about .data-metric-label {
  display: block;
  font-size: 0.78rem;
  color: var(--slate);
  margin-top: 0.2rem;
}
.page-about .data-system-card {
  background: var(--blue-700);
  border: 3px solid var(--blue-600);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.18);
  padding: 1.7rem 1.5rem;
}
.page-about .data-system-card h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--white);
  border-bottom: 2px solid var(--orange);
  padding-bottom: 0.5rem;
  margin-bottom: 0.8rem;
}
.page-about .data-card-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1.2rem;
}
.page-about .data-card-list li {
  position: relative;
  padding-left: 1.4rem;
  padding-top: 0.4rem;
  padding-bottom: 0.4rem;
  color: var(--slate);
  border-bottom: 1px dashed var(--blue-600);
}
.page-about .data-card-list li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--orange);
}
.page-about .data-card-note {
  background: var(--blue-900);
  border-left: 4px solid var(--yellow);
  padding: 0.7rem 0.9rem;
  font-size: 0.85rem;
  color: var(--slate);
  line-height: 1.65;
}
.page-about .about-data .btn {
  margin-top: 0.4rem;
}

.page-about .about-team {
  margin-bottom: 4.5rem;
}
.page-about .team-layout {
  display: grid;
  gap: 1.8rem;
}
.page-about .team-copy p {
  color: var(--slate);
  font-size: 0.98rem;
  line-height: 1.8;
  margin-bottom: 1rem;
}
.page-about .team-facts {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.8rem;
  margin: 1.5rem 0;
  padding: 0;
}
.page-about .team-fact {
  background: var(--blue-800);
  border: 2px solid var(--blue-600);
  text-align: center;
  padding: 1rem 0.6rem;
}
.page-about .team-fact dt {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.6rem, 3vw, 2rem);
  color: var(--orange);
  line-height: 1.2;
}
.page-about .team-fact dd {
  margin: 0.2rem 0 0;
  font-size: 0.82rem;
  color: var(--slate);
}
.page-about .team-trust {
  border-left: 5px solid var(--yellow);
  padding-left: 1rem;
  font-size: 0.95rem;
  color: var(--slate);
}
.page-about .team-figure {
  margin: 0;
}
.page-about .team-figure img {
  width: 100%;
  border: 4px solid var(--blue-600);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.28);
  object-fit: cover;
}
.page-about .team-figure figcaption {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--slate);
  margin-top: 0.75rem;
}

.page-about .about-trust {
  margin-bottom: 2rem;
}
.page-about .trust-banner {
  background: var(--blue-800);
  border: 3px solid var(--blue-600);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}
.page-about .trust-banner-text {
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--white);
  max-width: 62ch;
  margin: 0;
}
.page-about .trust-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}
.page-about .trust-links a {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--orange);
  background: var(--blue-900);
  border: 2px solid var(--orange);
  padding: 0.55rem 1.1rem;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease;
}
.page-about .trust-links a:hover,
.page-about .trust-links a:focus {
  background: var(--orange);
  color: var(--blue-900);
}

@media (min-width: 700px) {
  .page-about .origin-layout {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .origin-stat-block {
    grid-column: 1 / -1;
  }
  .page-about .timeline-item {
    padding-left: 4rem;
    margin-left: 1.8rem;
  }
  .page-about .timeline-card {
    padding: 1.7rem 1.6rem;
  }
  .page-about .trust-banner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
  .page-about .trust-links {
    flex-shrink: 0;
  }
}

@media (min-width: 800px) {
  .page-about .data-system-layout {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }
  .page-about .data-system-main {
    padding: 2.4rem 2rem 2rem;
  }
  .page-about .about-chart-figure {
    max-width: 760px;
    margin-left: auto;
    margin-right: auto;
  }
}

@media (min-width: 860px) {
  .page-about .team-layout {
    grid-template-columns: 6fr 5fr;
    align-items: start;
    gap: 2.5rem;
  }
  .page-about .team-figure {
    transform: translateY(-0.5rem);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: 7fr 5fr;
    gap: 3rem;
    align-items: center;
    padding-top: 1rem;
    padding-bottom: 4rem;
  }
  .page-about .about-hero-figure {
    align-self: start;
    transform: rotate(1deg);
  }
}

@media (min-width: 1000px) {
  .page-about .origin-layout {
    grid-template-columns: 5fr 6fr 4fr;
  }
  .page-about .origin-stat-block {
    grid-column: auto;
  }
  .page-about .origin-layout .origin-card:first-child {
    transform: translateY(10px);
  }
  .page-about .origin-card-accent {
    transform: translateY(-10px);
  }
  .page-about .origin-stat-block {
    transform: translateY(10px);
  }
}