.page-about {
  --about-paper: #F2EDE4;
  --about-ink: #0A2342;
  --about-gold-line: #D4AF37;
  --about-cloud: #B0B8C4;
  --about-sapphire: #1B3A5C;
  --about-data: #00D2FF;
  --about-crimson: #C0392B;
  --about-ivory: #F8F5F0;

  background-color: var(--about-ivory);
  color: var(--about-ink);
  font-family: var(--font-body, 'Noto Serif SC', serif);
}

.page-about .container {
  max-width: var(--content-max, 1240px);
  margin: 0 auto;
  padding-left: 32px;
  padding-right: 32px;
}

.page-about h1,
.page-about h2,
.page-about h3,
.page-about .section-index {
  font-family: var(--font-heading, 'Noto Sans SC', sans-serif);
}

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 24px 0 16px;
  font-size: var(--size-small, 14px);
  color: var(--about-sapphire);
}

.page-about .breadcrumb-link {
  color: var(--about-cloud);
  text-decoration: none;
}

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

.page-about .breadcrumb-arrow {
  color: var(--about-cloud);
}

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

.page-about .about-intro__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding: 32px 0 72px;
}

.page-about .about-intro__content .section-index {
  color: var(--about-crimson);
}

.page-about .about-intro h1 {
  font-size: clamp(28px, 5vw, var(--size-h1, 36px));
  line-height: 1.25;
  margin: 16px 0 24px;
  color: var(--about-ink);
  border-left: 4px solid var(--about-gold-line);
  padding-left: 20px;
}

.page-about .about-intro__lead {
  font-size: 18px;
  line-height: 1.8;
  color: var(--about-sapphire);
  margin-bottom: 20px;
}

.page-about .about-intro__content p:not(.section-index):not(.about-intro__lead) {
  line-height: 1.9;
  color: rgba(10, 35, 66, 0.8);
  margin-bottom: 24px;
}

.page-about .about-intro__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 32px;
}

.page-about .about-intro__stats .data-block {
  background: var(--about-ivory);
  border: 1px solid rgba(212, 175, 55, 0.4);
  border-radius: var(--radius, 4px);
  padding: 16px 24px;
  box-shadow: 0 2px 8px rgba(10, 35, 66, 0.06);
}

.page-about .about-intro__stats .data-stat {
  font-family: var(--font-heading, sans-serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--about-ink);
  display: block;
}

.page-about .about-intro__stats .data-label {
  font-size: var(--size-small, 14px);
  color: var(--about-sapphire);
}

.page-about .about-intro__figure {
  margin: 0;
  position: relative;
}

.page-about .about-intro__figure img {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  box-shadow: 0 20px 40px rgba(10, 35, 66, 0.15);
  display: block;
}

.page-about .about-intro__figure figcaption {
  margin-top: 12px;
  font-size: var(--size-small, 14px);
  color: var(--about-cloud);
  text-align: right;
  letter-spacing: 0.5px;
}

.page-about .section-heading {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  margin-bottom: 32px;
}

.page-about .section-heading .section-index {
  color: var(--about-gold-line);
  font-size: var(--size-small, 14px);
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.page-about .section-heading h2 {
  font-size: clamp(24px, 4vw, var(--size-h2, 28px));
  line-height: 1.4;
  margin: 8px 0 12px;
}

.page-about .section-rule {
  display: block;
  width: 80px;
  height: 2px;
  background: linear-gradient(90deg, var(--about-gold-line), rgba(212, 175, 55, 0.1));
}

.page-about .section--light {
  background-color: var(--about-paper);
  box-shadow: inset 0 2px 0 rgba(10, 35, 66, 0.06);
}

.page-about .section--dark {
  background-color: var(--about-ink);
  color: var(--about-ivory);
}

.page-about .section--dark .section-heading h2 {
  color: var(--about-ivory);
}

.page-about .section--dark .section-heading .section-index {
  color: var(--about-gold-light, #F9E5A8);
}

.page-about .about-timeline {
  padding: 72px 0 96px;
  background:
    linear-gradient(rgba(248, 245, 240, 0.9), rgba(248, 245, 240, 0.9)),
    repeating-linear-gradient(0deg, transparent, transparent 23px, rgba(10, 35, 66, 0.03) 24px);
}

.page-about .timeline-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

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

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--about-gold-line), var(--about-data), rgba(176, 184, 196, 0.3));
}

.page-about .timeline-item {
  position: relative;
  padding-left: 40px;
  padding-bottom: 48px;
}

.page-about .timeline-item:last-child {
  padding-bottom: 0;
}

.page-about .timeline-dot {
  position: absolute;
  left: 4px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--about-gold-line);
  box-shadow: 0 0 0 4px var(--about-ivory), 0 0 0 6px rgba(212, 175, 55, 0.3);
}

.page-about .timeline-year {
  font-family: var(--font-heading, sans-serif);
  font-weight: 700;
  font-size: 20px;
  color: var(--about-gold-line);
  display: block;
  margin-bottom: 4px;
}

.page-about .timeline-card {
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(10, 35, 66, 0.08);
  border-radius: 4px;
  padding: 20px 24px;
  box-shadow: 0 4px 12px rgba(10, 35, 66, 0.05);
}

.page-about .timeline-card h3 {
  font-size: 20px;
  margin: 0 0 8px;
}

.page-about .timeline-card p {
  margin: 0;
  line-height: 1.7;
  color: rgba(10, 35, 66, 0.75);
}

.page-about .timeline-visual {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .timeline-visual figure {
  margin: 0;
}

.page-about .timeline-visual img {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  box-shadow: 0 12px 24px rgba(10, 35, 66, 0.12);
  display: block;
}

.page-about .timeline-visual figcaption {
  font-size: var(--size-small, 14px);
  color: var(--about-cloud);
  margin-top: 8px;
}

.page-about .timeline-note {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(0, 210, 255, 0.08);
  border-left: 3px solid var(--about-data);
  padding: 12px 16px;
}

.page-about .timeline-note p {
  margin: 0;
  font-size: var(--size-small, 14px);
  color: var(--about-sapphire);
}

.page-about .map-legend-dot—gold,
.page-about .map-legend-dot--gold {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--about-gold-line);
  display: inline-block;
}

.page-about .about-team {
  padding: 72px 0;
}

.page-about .team-lead {
  max-width: 760px;
  line-height: 1.8;
  margin-bottom: 24px;
  color: var(--about-sapphire);
}

.page-about .filter-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.page-about .filter-btn {
  font-family: var(--font-heading, sans-serif);
  font-size: var(--size-small, 14px);
  padding: 8px 16px;
  border: 1px solid rgba(10, 35, 66, 0.2);
  background: transparent;
  color: var(--about-ink);
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.page-about .filter-btn[aria-pressed="true"] {
  background: var(--about-gold-line);
  border-color: var(--about-gold-line);
  color: var(--about-ink);
}

.page-about .filter-btn:hover {
  border-color: var(--about-gold-line);
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .team-item {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(10, 35, 66, 0.08);
  border-radius: 4px;
  padding: 32px 24px;
  transition: box-shadow 0.2s;
}

.page-about .team-item[hidden] {
  display: none;
}

.page-about .team-item:hover {
  box-shadow: 0 8px 24px rgba(10, 35, 66, 0.08);
}

.page-about .team-item__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border: 1px solid rgba(212, 175, 55, 0.4);
  border-radius: 50%;
  margin-bottom: 16px;
  background: rgba(212, 175, 55, 0.06);
}

.page-about .team-item h3 {
  font-size: var(--size-h3, 22px);
  margin: 0 0 12px;
}

.page-about .team-item p {
  line-height: 1.7;
  color: rgba(10, 35, 66, 0.75);
  margin: 0;
}

.page-about .about-cert {
  padding: 72px 0;
  background: linear-gradient(135deg, rgba(10, 35, 66, 0.03) 25%, transparent 25%) 0 0 / 24px 24px,
              linear-gradient(315deg, rgba(10, 35, 66, 0.03) 25%, transparent 25%) 0 0 / 24px 24px,
              var(--about-ivory);
}

.page-about .cert-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

.page-about .cert-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .cert-list li {
  display: flex;
  gap: 16px;
  padding: 24px 0;
  border-bottom: 1px solid rgba(10, 35, 66, 0.08);
}

.page-about .cert-badge {
  flex-shrink: 0;
  min-width: 64px;
  text-align: center;
  padding: 8px 12px;
  border: 1px solid var(--about-gold-line);
  border-radius: 4px;
  font-family: var(--font-heading, sans-serif);
  font-size: var(--size-small, 14px);
  font-weight: 700;
  color: var(--about-ink);
  background: rgba(212, 175, 55, 0.1);
  align-self: flex-start;
}

.page-about .cert-list p {
  margin: 0;
  line-height: 1.7;
  color: rgba(10, 35, 66, 0.75);
}

.page-about .cert-list strong {
  display: block;
  color: var(--about-ink);
  margin-bottom: 4px;
  font-family: var(--font-heading, sans-serif);
}

.page-about .cert-data {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
  align-content: start;
}

.page-about .cert-data .data-block {
  border: 1px solid rgba(212, 175, 55, 0.3);
  background: rgba(248, 245, 240, 0.8);
  padding: 24px 16px;
  text-align: center;
  box-shadow: 0 8px 20px rgba(10, 35, 66, 0.06);
}

.page-about .cert-data .data-stat {
  font-family: var(--font-heading, sans-serif);
  font-size: 36px;
  font-weight: 700;
  color: var(--about-ink);
  display: block;
}

.page-about .cert-data .data-label {
  font-size: var(--size-small, 14px);
  color: var(--about-sapphire);
  line-height: 1.4;
}

.page-about .about-ecosystem {
  padding: 72px 0;
  position: relative;
  overflow: hidden;
}

.page-about .about-ecosystem::after {
  content: "";
  position: absolute;
  right: -80px;
  top: 40px;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.page-about .about-ecosystem .section-heading h2 {
  font-size: clamp(24px, 4vw, var(--size-h2, 28px));
}

.page-about .ecosystem-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin: 32px 0;
}

.page-about .ecosystem-item {
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 32px 24px;
  background: rgba(255, 255, 255, 0.03);
  position: relative;
}

.page-about .ecosystem-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: var(--about-gold-line);
}

.page-about .ecosystem-count {
  font-family: var(--font-heading, sans-serif);
  font-size: 40px;
  font-weight: 700;
  color: var(--about-gold-line);
  display: block;
  margin-bottom: 8px;
}

.page-about .ecosystem-item h3 {
  color: var(--about-ivory);
  font-size: 20px;
  margin: 0 0 12px;
}

.page-about .ecosystem-item p {
  color: rgba(248, 245, 240, 0.7);
  line-height: 1.7;
  margin: 0;
}

.page-about .ecosystem-statement {
  border-top: 1px solid rgba(212, 175, 55, 0.3);
  padding-top: 24px;
  color: var(--about-gold-light, #F9E5A8);
  font-size: 16px;
  line-height: 1.8;
  margin: 24px 0 0;
}

.page-about .about-region {
  padding: 72px 0;
  background: linear-gradient(to bottom, var(--about-paper), var(--about-ivory));
}

.page-about .region-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .region-content p {
  line-height: 1.9;
  color: rgba(10, 35, 66, 0.8);
}

.page-about .region-tags {
  margin-top: 24px;
}

.page-about .tag {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid rgba(10, 35, 66, 0.2);
  border-radius: 999px;
  font-size: var(--size-small, 14px);
  color: var(--about-ink);
  background: transparent;
  font-family: var(--font-heading, sans-serif);
}

.page-about .tag--crimson {
  border-color: var(--about-crimson);
  color: var(--about-crimson);
  background: rgba(192, 57, 43, 0.05);
}

.page-about .region-figure {
  margin: 0;
  position: relative;
}

.page-about .region-figure img {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  border: 1px solid rgba(212, 175, 55, 0.4);
  box-shadow: 0 16px 32px rgba(10, 35, 66, 0.1);
}

.page-about .region-figure figcaption {
  margin-top: 12px;
  font-size: var(--size-small, 14px);
  color: var(--about-sapphire);
  text-align: right;
}

.page-about .about-cta {
  padding: 64px 0 96px;
}

.page-about .cta-panel {
  background: linear-gradient(135deg, var(--about-ink), var(--about-sapphire));
  border: 1px solid rgba(212, 175, 55, 0.4);
  border-radius: 4px;
  padding: 48px 32px;
  color: var(--about-ivory);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-about .cta-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--about-gold-line), var(--about-data), var(--about-gold-line));
}

.page-about .cta-panel .section-index {
  color: var(--about-gold-light, #F9E5A8);
  font-size: var(--size-small, 14px);
  letter-spacing: 2px;
}

.page-about .cta-panel h2 {
  font-size: clamp(24px, 4vw, var(--size-h2, 28px));
  margin: 12px 0 24px;
}

.page-about .cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.page-about .btn {
  font-family: var(--font-heading, sans-serif);
  font-size: 16px;
  text-decoration: none;
  padding: 12px 24px;
  border-radius: 4px;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.page-about .btn-primary {
  background: var(--about-gold-line);
  color: var(--about-ink);
  border: 1px solid var(--about-gold-line);
}

.page-about .btn-primary:hover {
  background: var(--about-gold-light, #F9E5A8);
}

.page-about .btn-ghost {
  background: transparent;
  color: var(--about-ivory);
  border: 1px solid rgba(248, 245, 240, 0.5);
}

.page-about .btn-ghost:hover {
  border-color: var(--about-gold-line);
  color: var(--about-gold-line);
}

.page-about .cta-note {
  margin: 32px 0 0;
  font-size: var(--size-small, 14px);
  color: rgba(248, 245, 240, 0.6);
}

.page-about .cta-note a {
  color: var(--about-gold-light, #F9E5A8);
  text-decoration: underline;
}

.page-about .cta-note a:hover {
  color: var(--about-gold-line);
}

@media (min-width: 768px) {
  .page-about .about-intro__grid {
    grid-template-columns: 7fr 5fr;
    align-items: center;
    gap: 48px;
    padding: 40px 0 96px;
  }

  .page-about .about-intro__figure {
    margin: 0;
  }

  .page-about .timeline-layout {
    grid-template-columns: 1fr 0.9fr;
    gap: 56px;
    align-items: start;
  }

  .page-about .timeline::before {
    left: 16px;
  }

  .page-about .timeline-item {
    padding-left: 56px;
  }

  .page-about .timeline-dot {
    left: 10px;
  }

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

  .page-about .cert-layout {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 64px;
    align-items: start;
  }

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

  .page-about .region-layout {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
  }

  .page-about .region-figure img {
    height: 400px;
    object-fit: cover;
  }

  .page-about .about-intro__stats {
    gap: 32px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-intro h1 {
    font-size: var(--size-h1, 36px);
  }

  .page-about .about-intro__figure img {
    min-height: 420px;
    object-fit: cover;
  }

  .page-about .section-heading {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 16px;
  }

  .page-about .section-heading h2 {
    flex-basis: 100%;
  }

  .page-about .section-heading .section-rule {
    margin-top: -8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition: none !important;
  }

  .page-about .timeline-item,
  .page-about .team-item,
  .page-about .cert-data .data-block {
    opacity: 1 !important;
    transform: none !important;
  }
}

.page-about {
  --about-gold-light: transparent;
}