.page-about {
  --about-line-color: rgba(255, 201, 74, 0.22);
  --about-cyan-soft: rgba(0, 229, 255, 0.12);
  --about-gold-soft: rgba(255, 201, 74, 0.08);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-head);
  line-height: 1.25;
}

.page-about p {
  line-height: 1.85;
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 2.5rem 0 3rem;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -150px;
  right: -150px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  border: 1px solid rgba(255, 201, 74, 0.1);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -40px;
  right: -60px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  border: 1px dashed rgba(0, 229, 255, 0.14);
  pointer-events: none;
}

.page-about .breadcrumb {
  margin-bottom: 2rem;
}

.page-about .about-hero-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.page-about .about-hero-copy {
  position: relative;
  z-index: 1;
}

.page-about .page-title {
  position: relative;
  margin: 0.75rem 0 1.25rem;
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .page-title::after {
  content: "";
  display: block;
  width: 3.5rem;
  height: 3px;
  background: var(--gold);
  margin-top: 1rem;
}

.page-about .about-lead {
  margin: 0 0 1rem;
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--text);
}

.page-about .about-sub {
  margin: 0;
  color: var(--text-sec);
  max-width: 46rem;
}

.page-about .hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.page-about .about-hero-figure {
  margin: 0;
  border: 1px solid var(--about-line-color);
  padding: 0.5rem;
}

.page-about .image-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-toc {
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
  border-top: 1px solid var(--divider);
  border-bottom: 1px solid var(--divider);
}

.page-about .toc-list {
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-about .toc-list a {
  display: inline-block;
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--divider);
  color: var(--text-sec);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: border-color var(--transition), color var(--transition), background-color var(--transition);
}

.page-about .toc-list a:hover,
.page-about .toc-list a:focus-visible {
  border-color: var(--gold);
  color: var(--gold);
  background: var(--about-gold-soft);
}

.page-about .about-section {
  padding: 3.5rem 0;
  border-top: 1px solid var(--divider);
  scroll-margin-top: 6rem;
}

.page-about .section-head {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.page-about .section-head .count {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--gold);
  border: 1px solid var(--divider);
  padding: 0.28rem 0.6rem;
  white-space: nowrap;
}

.page-about .section-title {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 700;
}

.page-about .section-intro {
  max-width: 42rem;
  margin: 0 0 2rem;
  color: var(--text-sec);
}

.page-about .origin-grid {
  display: grid;
  gap: 2rem;
}

.page-about .origin-copy p {
  color: var(--text-sec);
}

.page-about .origin-copy p + p {
  margin-top: 1rem;
}

.page-about .origin-principle {
  margin-top: 1.5rem;
  padding-left: 1rem;
  border-left: 3px solid var(--gold);
  color: var(--text);
  font-weight: 500;
}

.page-about .origin-facts {
  border: 1px solid var(--divider);
  background: var(--bg-card);
  padding: 1.5rem;
}

.page-about .origin-facts h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  color: var(--text);
}

.page-about .fact-list {
  margin: 0;
}

.page-about .fact-row {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--divider);
}

.page-about .fact-row:last-child {
  border-bottom: 0;
}

.page-about .fact-row dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--gold);
  letter-spacing: 0.06em;
}

.page-about .fact-row dd {
  margin: 0;
  color: var(--text);
  font-weight: 500;
  line-height: 1.6;
}

.page-about .milestones-section {
  background: var(--bg-deep);
}

.page-about .milestone-list {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  position: relative;
}

.page-about .milestone-item {
  position: relative;
  padding-left: 2.25rem;
}

.page-about .milestone-item::before {
  content: "";
  position: absolute;
  left: 0.55rem;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--divider);
}

.page-about .milestone-item:first-child::before {
  top: 1.75rem;
}

.page-about .milestone-item:last-child::before {
  height: 1.75rem;
  bottom: auto;
}

.page-about .milestone-summary {
  display: grid;
  grid-template-columns: auto auto 1fr auto;
  align-items: center;
  gap: 0.65rem;
  cursor: pointer;
  padding: 0.5rem 0;
  list-style: none;
}

.page-about .milestone-summary::-webkit-details-marker {
  display: none;
}

.page-about .milestone-year {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--gold);
  white-space: nowrap;
}

.page-about .milestone-dot {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(255, 201, 74, 0.16);
  flex-shrink: 0;
}

.page-about .milestone-headline {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
}

.page-about .milestone-title {
  font-weight: 600;
  color: var(--text);
}

.page-about .milestone-toggle {
  width: 1.6rem;
  height: 1.6rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--divider);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1;
  transition: transform 0.25s ease, border-color var(--transition), color var(--transition);
}

.page-about .milestone-summary:hover .milestone-toggle,
.page-about .milestone-summary:focus-visible .milestone-toggle {
  border-color: var(--gold);
  color: var(--gold);
}

.page-about details[open] .milestone-toggle {
  transform: rotate(45deg);
}

.page-about .milestone-content {
  padding: 0.75rem 0 1.25rem 2.75rem;
  color: var(--text-sec);
}

.page-about .milestone-content p {
  margin: 0 0 0.75rem;
}

.page-about .btn-sm {
  padding: 0.4rem 0.8rem;
  font-size: 0.8rem;
}

.page-about .timeline-note {
  margin-top: 2rem;
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--divider);
  background: var(--about-gold-soft);
}

.page-about .timeline-note p {
  margin: 0;
  color: var(--text-sec);
  font-size: 0.92rem;
}

.page-about .org-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-about .org-card {
  background: var(--bg-card);
  border: 1px solid var(--divider);
  padding: 1.5rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition), background-color var(--transition);
}

.page-about .org-card:hover {
  border-color: var(--gold);
  background: #143458;
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.22);
}

.page-about .org-card h3 {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 0.75rem;
  font-size: 1.05rem;
}

.page-about .org-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--cyan);
  border: 1px solid var(--about-cyan-soft);
  padding: 0.15rem 0.4rem;
  transition: color var(--transition), border-color var(--transition);
}

.page-about .org-card:hover .org-num {
  color: var(--gold);
  border-color: var(--gold);
}

.page-about .org-card p {
  margin: 0 0 0.85rem;
  color: var(--text-sec);
  font-size: 0.92rem;
}

.page-about .org-tag {
  font-size: 0.72rem;
  transition: border-color var(--transition), color var(--transition);
}

.page-about .org-card:hover .org-tag {
  border-color: var(--gold);
  color: var(--gold);
}

.page-about .team-figure {
  margin: 1.5rem 0 0;
  border: 1px solid var(--divider);
  padding: 0.5rem;
}

.page-about .data-section {
  background: var(--bg-deep);
}

.page-about .data-layout {
  display: grid;
  gap: 2rem;
}

.page-about .data-copy p {
  margin: 0;
  color: var(--text-sec);
}

.page-about .data-points {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.page-about .data-points li {
  position: relative;
  padding-left: 1.4rem;
  color: var(--text-sec);
}

.page-about .data-points li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--gold);
}

.page-about .data-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
}

.page-about .stat-block {
  background: var(--bg-card);
  border: 1px solid var(--divider);
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  transition: border-color var(--transition), background-color var(--transition);
}

.page-about .stat-block:hover {
  border-color: var(--cyan);
  background: #143458;
}

.page-about .stat-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-sec);
  letter-spacing: 0.06em;
}

.page-about .stat-num {
  font-family: var(--font-head);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--gold);
  line-height: 1.15;
}

.page-about .stat-unit {
  font-size: 0.78rem;
  color: var(--text-sec);
}

.page-about .data-figure {
  margin: 1.5rem 0 0;
  border: 1px solid var(--divider);
  padding: 0.5rem;
}

.page-about .cert-grid {
  display: grid;
  gap: 1rem;
}

.page-about .cert-card {
  background: var(--bg-card);
  border: 1px solid var(--divider);
  padding: 1.75rem 1.5rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.page-about .cert-card:hover {
  border-color: var(--gold);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.page-about .cert-icon {
  display: inline-block;
  color: var(--gold);
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
}

.page-about .cert-card h3 {
  margin: 0 0 0.6rem;
  font-size: 1.05rem;
}

.page-about .cert-card p {
  margin: 0;
  color: var(--text-sec);
  font-size: 0.9rem;
}

.page-about .trust-statement {
  margin: 2.5rem 0 1.5rem;
  padding: 1.75rem 1.5rem;
  border-left: 4px solid var(--gold);
  background: var(--about-gold-soft);
}

.page-about .trust-statement p {
  margin: 0;
  color: var(--text);
  line-height: 1.9;
  font-weight: 500;
}

.page-about .ecosystem-cta {
  text-align: center;
}

.page-about .about-cta {
  padding: 4rem 0;
  text-align: center;
  border-top: 1px solid var(--divider);
  background:
    radial-gradient(circle at 85% 30%, rgba(255, 201, 74, 0.08) 0%, transparent 50%),
    var(--bg);
}

.page-about .about-cta h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
}

.page-about .about-cta p {
  max-width: 34rem;
  margin: 0 auto 1.5rem;
  color: var(--text-sec);
}

.page-about .cta-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 3.5rem 0 4rem;
  }

  .page-about .origin-grid {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: start;
  }

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

  .page-about .data-layout {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: start;
  }

  .page-about .data-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (min-width: 1024px) {
  .page-about .about-hero-grid {
    grid-template-columns: 1.05fr 0.95fr;
  }

  .page-about .toc-list {
    gap: 0.75rem;
  }

  .page-about .about-section {
    padding: 5rem 0;
  }

  .page-about .milestone-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
  }

  .page-about .milestone-list::before {
    content: "";
    position: absolute;
    top: 1.5rem;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--divider);
  }

  .page-about .milestone-item {
    padding-left: 0;
  }

  .page-about .milestone-item::before {
    display: none;
  }

  .page-about .milestone-summary {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.6rem;
    padding-top: 2.5rem;
  }

  .page-about .milestone-dot {
    position: absolute;
    top: 1.5rem;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 0.9rem;
    height: 0.9rem;
  }

  .page-about .milestone-year {
    font-size: 1.05rem;
  }

  .page-about .milestone-headline {
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
  }

  .page-about .milestone-toggle {
    position: absolute;
    top: 0.6rem;
    right: 0.4rem;
  }

  .page-about .milestone-content {
    padding: 1rem 0.5rem 0.25rem;
    text-align: left;
  }

  .page-about .cert-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 1280px) {
  .page-about .hero-cta {
    margin-top: 2rem;
  }

  .page-about .about-lead {
    font-size: 1.35rem;
  }

  .page-about .about-sub {
    font-size: 1.02rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .org-card,
  .page-about .cert-card,
  .page-about .stat-block,
  .page-about .milestone-toggle {
    transition: none;
  }
}