.page-about {
  --about-axis-color: var(--line-strong);
  position: relative;
  overflow-x: clip;
  scroll-behavior: smooth;
}

.page-about .breadcrumb {
  padding: 14px 20px;
  max-width: var(--content-max);
  margin: 0 auto;
  font-size: 13px;
  color: var(--dim);
}

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

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

/* === Hero === */
.page-about .about-hero {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 12px 20px 48px;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-hero-main h1 {
  font-family: var(--font-display);
  font-size: 30px;
  line-height: 1.18;
  margin: 12px 0 14px;
  letter-spacing: 0.01em;
  font-weight: 800;
}

.page-about .about-hero-intro {
  color: var(--dim);
  font-size: 15px;
  line-height: 1.75;
  max-width: 56ch;
  margin: 0 0 22px;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-hero-index {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  align-self: start;
  box-shadow: var(--shadow-panel);
}

.page-about .about-chapter-list {
  list-style: none;
  padding: 0;
  margin: 14px 0 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-chapter-list a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 8px;
  border-bottom: 1px solid var(--line);
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s, border-color 0.2s, padding-left 0.2s;
}

.page-about .about-chapter-list a::before {
  content: "·";
  color: var(--gold);
  font-weight: 700;
  font-size: 18px;
}

.page-about .about-chapter-list a:hover {
  color: var(--gold);
  border-color: var(--gold);
  padding-left: 14px;
}

/* === Fixed chapter index === */
.page-about .about-fixed-index {
  display: none;
}

/* === Section base === */
.page-about .about-section {
  padding: 40px 20px 48px;
  position: relative;
  scroll-margin-top: 80px;
}

.page-about .about-section-label {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: var(--content-max);
  margin: 0 auto 24px;
}

.page-about .about-section-line {
  flex: 1;
  height: 1px;
  background: var(--line);
}

.page-about .about-section-label .mono-label:last-child {
  white-space: nowrap;
}

/* === Origin === */
.page-about .about-origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  max-width: var(--content-max);
  margin: 0 auto;
}

.page-about .about-origin-image img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
  display: block;
  box-shadow: var(--shadow-panel);
}

.page-about .about-origin-content h2,
.page-about .about-milestones-header h2,
.page-about .about-capabilities-header h2,
.page-about .about-qualifications-header h2 {
  font-family: var(--font-display);
  font-size: 26px;
  line-height: 1.25;
  margin: 0 0 12px;
  font-weight: 800;
}

.page-about .about-origin-content > p {
  color: var(--dim);
  font-size: 15px;
  line-height: 1.75;
  margin: 0 0 12px;
}

.page-about .about-origin-values {
  list-style: none;
  padding: 0;
  margin: 22px 0 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-origin-values li {
  border-radius: var(--radius-md);
  padding: 16px 18px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-origin-values li strong {
  display: block;
  font-size: 17px;
  margin-top: 8px;
  color: var(--text);
}

.page-about .about-origin-values li p {
  color: var(--dim);
  font-size: 14px;
  line-height: 1.6;
  margin: 6px 0 0;
}

/* === Timeline / Milestones === */
.page-about .about-milestones {
  background: linear-gradient(180deg, transparent 0%, rgba(15, 37, 71, 0.45) 35%, rgba(15, 37, 71, 0.45) 65%, transparent 100%);
}

.page-about .about-milestones-header {
  max-width: var(--content-max);
  margin: 0 auto 32px;
}

.page-about .about-milestones-header p {
  color: var(--dim);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .about-timeline {
  position: relative;
  max-width: var(--content-max);
  margin: 0 auto;
  padding-left: 48px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 18px;
  width: 2px;
  background: var(--line);
}

.page-about .about-timeline-item {
  position: relative;
  margin-bottom: 28px;
}

.page-about .about-timeline-marker {
  position: absolute;
  left: -36px;
  top: 20px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--gold);
  border: 3px solid var(--bg);
  box-shadow: 0 0 0 2px var(--gold);
  z-index: 1;
}

.page-about .about-timeline-card {
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-timeline-card h3 {
  font-family: var(--font-display);
  font-size: 20px;
  margin: 6px 0 8px;
  font-weight: 700;
}

.page-about .about-timeline-card p {
  color: var(--dim);
  font-size: 14px;
  line-height: 1.65;
  margin: 0;
}

/* === Capabilities === */
.page-about .about-capabilities {
  max-width: var(--content-max);
  margin: 0 auto;
}

.page-about .about-capabilities-header {
  margin-bottom: 24px;
}

.page-about .about-capabilities-header p {
  color: var(--dim);
  font-size: 15px;
  line-height: 1.7;
}

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

.page-about .about-capabilities-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 240px;
}

.page-about .about-capabilities-bg {
  width: 100%;
  height: 100%;
  min-height: 240px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  display: block;
}

.page-about .about-capabilities-overlay {
  position: absolute;
  bottom: 16px;
  left: 16px;
  right: 16px;
  border-radius: var(--radius-md);
  padding: 16px 18px;
  border: 1px solid var(--line);
  background: rgba(15, 37, 71, 0.88);
  backdrop-filter: blur(4px);
}

.page-about .about-capabilities-overlay p {
  color: var(--dim);
  font-size: 13px;
  line-height: 1.6;
  margin: 4px 0;
}

.page-about .about-dashboard-panels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-ring-panel {
  border-radius: var(--radius-lg);
  padding: 20px;
  border: 1px solid var(--line);
  text-align: center;
  background: var(--panel);
}

.page-about .about-ring {
  position: relative;
  width: 120px;
  height: 120px;
  margin: 0 auto 12px;
}

.page-about .about-ring svg {
  width: 100%;
  height: 100%;
  display: block;
}

.page-about .about-ring-fill {
  transition: filter 0.3s;
}

.page-about .about-ring-panel:hover .about-ring-fill {
  filter: brightness(1.2);
}

.page-about .about-ring-num {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-ring-num small {
  font-size: 12px;
  margin-left: 2px;
  color: var(--dim);
}

.page-about .about-ring-panel > p {
  color: var(--dim);
  font-size: 14px;
  line-height: 1.6;
  margin: 6px 0 0;
}

.page-about .about-ring-panel > .mono-label {
  display: inline-block;
  margin-top: 10px;
  border-top: 1px solid var(--line);
  padding-top: 8px;
}

/* === Stats grid === */
.page-about .about-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-stat-card {
  border-radius: var(--radius-md);
  padding: 18px 14px;
  border: 1px solid var(--line);
  text-align: center;
  background: var(--panel);
}

.page-about .about-stat-num {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  color: var(--gold);
  display: block;
  line-height: 1;
}

.page-about .about-stat-card .mono-label {
  font-size: 12px;
  color: var(--dim);
  margin-top: 4px;
  display: inline-block;
}

.page-about .about-stat-card p {
  color: var(--dim);
  font-size: 13px;
  margin: 8px 0 0;
}

/* === Qualifications / Tabs === */
.page-about .about-qualifications-header {
  max-width: var(--content-max);
  margin: 0 auto 24px;
}

.page-about .about-qualifications-header p {
  color: var(--dim);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .about-qualification-list,
.page-about .about-coverage-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .about-qualification-card,
.page-about .about-coverage-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  border-radius: var(--radius-md);
  padding: 16px 18px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-qualification-card h3,
.page-about .about-coverage-card h3 {
  font-size: 17px;
  margin: 0 0 4px;
  font-weight: 700;
}

.page-about .about-qualification-card p,
.page-about .about-coverage-card p {
  color: var(--dim);
  font-size: 14px;
  line-height: 1.6;
  margin: 0;
}

/* === Ecosystem === */
.page-about .about-ecosystem-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

.page-about .about-ecosystem-card {
  border-radius: var(--radius-md);
  padding: 18px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-ecosystem-card h3 {
  font-size: 17px;
  margin: 0 0 6px;
  font-weight: 700;
}

.page-about .about-ecosystem-card p {
  color: var(--dim);
  font-size: 14px;
  line-height: 1.6;
  margin: 0 0 8px;
}

.page-about .about-eco-link {
  color: var(--gold);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}

.page-about .about-eco-link:hover {
  color: var(--gold-light);
}

.page-about .about-ecosystem-grid + img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  display: block;
  box-shadow: var(--shadow-panel);
}

/* === CTA === */
.page-about .about-footer-cta {
  padding: 48px 20px 56px;
  max-width: var(--content-max);
  margin: 0 auto;
}

.page-about .about-cta-panel {
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  border: 1px solid var(--line);
  text-align: center;
  background: linear-gradient(135deg, var(--panel) 0%, rgba(123, 44, 191, 0.18) 100%);
  box-shadow: var(--shadow-panel);
}

.page-about .about-cta-panel h2 {
  font-family: var(--font-display);
  font-size: 26px;
  margin: 8px 0 8px;
  font-weight: 800;
}

.page-about .about-cta-panel p {
  color: var(--dim);
  font-size: 15px;
  margin: 0 0 20px;
  line-height: 1.7;
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

/* === Media Queries === */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 20px 32px 56px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: 3fr 2fr;
    gap: 40px;
    align-items: start;
  }

  .page-about .about-hero-main h1 {
    font-size: 38px;
  }

  .page-about .about-hero-intro {
    font-size: 16px;
  }

  .page-about .about-section {
    padding: 56px 32px 64px;
  }

  .page-about .about-origin-grid {
    grid-template-columns: 5fr 7fr;
    gap: 40px;
    align-items: center;
  }

  .page-about .about-origin-values {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .page-about .about-origin-content h2,
  .page-about .about-milestones-header h2,
  .page-about .about-capabilities-header h2,
  .page-about .about-qualifications-header h2 {
    font-size: 32px;
  }

  .page-about .about-capabilities-grid {
    grid-template-columns: 5fr 7fr;
    align-items: stretch;
  }

  .page-about .about-dashboard-panels {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .page-about .about-stats-grid {
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: 16px;
  }

  .page-about .about-ecosystem-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .page-about .about-footer-cta {
    padding: 60px 32px 72px;
  }
}

@media (min-width: 1400px) {
  .page-about .about-fixed-index {
    display: block;
    position: fixed;
    left: 24px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 60;
  }

  .page-about .about-fixed-index nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: rgba(15, 37, 71, 0.92);
    border: 1px solid var(--line);
    border-radius: var(--radius-pill);
    padding: 10px 8px;
    backdrop-filter: blur(6px);
    box-shadow: var(--shadow-panel);
  }

  .page-about .about-fixed-index a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: var(--radius-pill);
    color: var(--dim);
    text-decoration: none;
    font-size: 13px;
    transition: color 0.2s, background 0.2s;
  }

  .page-about .about-fixed-index a .mono-label {
    color: var(--gold);
    font-size: 11px;
  }

  .page-about .about-fixed-index a:hover {
    color: var(--gold);
    background: rgba(242, 169, 0, 0.12);
  }
}

@media (min-width: 1200px) {
  /* Desktop timeline: central axis */
  .page-about .about-timeline {
    padding-left: 0;
  }

  .page-about .about-timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .about-timeline-item {
    width: 50%;
    padding-right: 48px;
    margin-bottom: 36px;
    margin-left: 0;
  }

  .page-about .about-timeline-item.about-timeline-right {
    margin-left: 50%;
    padding-right: 0;
    padding-left: 48px;
  }

  .page-about .about-timeline-marker {
    left: auto;
    right: -7px;
    top: 22px;
  }

  .page-about .about-timeline-item.about-timeline-right .about-timeline-marker {
    right: auto;
    left: -7px;
  }
}