.page-about {
  --about-bg-deep: #0B0F1A;
  --about-bg-card: #111827;
  --about-line: #1F2937;
  --about-neon: #00FF88;
  --about-blue: #00BFFF;
  --about-orange: #FF4500;
  --about-text-main: #E5E7EB;
  --about-text-sub: #9CA3AF;
  --about-head-font: "Arial Black", "Helvetica Neue", sans-serif;
  --about-num-font: "Roboto Mono", "SFMono-Regular", monospace;
  --about-body-font: "Inter", "Noto Sans SC", sans-serif;
  --about-container-w: 1400px;
  background-color: var(--about-bg-deep);
  color: var(--about-text-main);
  font-family: var(--about-body-font);
  position: relative;
  min-height: 100vh;
}

.page-about .about-shell {
  max-width: var(--about-container-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

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

.page-about .about-main {
  min-width: 0;
  padding: 1rem 1.25rem 4rem;
}

.page-about .about-hero {
  padding-top: 2.5rem;
}

.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.625rem 1rem;
  margin-bottom: 1.25rem;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--about-text-sub);
}

.page-about .about-hero-tag {
  background: var(--about-neon);
  color: var(--about-bg-deep);
  font-weight: 700;
  padding: 0.25rem 0.625rem;
  font-size: 0.8125rem;
}

.page-about .about-hero-code {
  font-family: var(--about-num-font);
  color: var(--about-blue);
}

.page-about .about-hero-title {
  font-family: var(--about-head-font);
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.15;
  margin: 0 0 1.25rem;
  letter-spacing: 0.01em;
  max-width: 14em;
}

.page-about .about-hero-title-amp {
  color: var(--about-neon);
  margin: 0 0.15em;
}

.page-about .about-hero-desc {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--about-text-sub);
  max-width: 38em;
  margin: 0 0 2rem;
}

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

.page-about .about-hero-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  margin-bottom: 2rem;
}

.page-about .about-hero-strip-item {
  flex: 1 1 180px;
  background: var(--about-bg-deep);
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.page-about .about-hero-strip-num {
  font-family: var(--about-num-font);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--about-neon);
}

.page-about .about-hero-strip-label {
  font-size: 0.8125rem;
  color: var(--about-text-sub);
}

.page-about .about-hero-art {
  border: 1px solid var(--about-line);
  overflow: hidden;
  background: var(--about-bg-card);
  margin-bottom: 1rem;
}

.page-about .about-hero-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-section {
  padding: 4rem 0 0;
  border-top: 1px solid var(--about-line);
  margin-top: 4rem;
}

.page-about .about-section-head {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.page-about .about-section-index {
  font-family: var(--about-num-font);
  font-size: 1rem;
  font-weight: 700;
  color: var(--about-orange);
}

.page-about .about-section-rule {
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--about-text-sub);
}

.page-about .about-section-title {
  font-family: var(--about-head-font);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  margin: 0 0 2rem;
  line-height: 1.25;
}

.page-about .about-mission-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.page-about .about-mission-lead {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  line-height: 1.6;
  font-weight: 600;
  margin: 0;
  color: var(--about-text-main);
}

.page-about .about-mission-body {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--about-text-sub);
  margin: 0;
  max-width: 36em;
}

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

.page-about .about-timeline-wrap {
  position: relative;
  padding-left: 0.5rem;
}

.page-about .about-timeline-svg {
  display: none;
}

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

.page-about .about-timeline-list::before {
  content: "";
  position: absolute;
  left: 1.25rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--about-line);
}

.page-about .about-timeline-item {
  position: relative;
  padding: 1rem 0 1rem 4rem;
  margin: 0;
  border-left: 3px solid transparent;
  transition: border-left-color 0.2s ease;
}

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: 1.125rem;
  top: 1.875rem;
  width: 0.375rem;
  height: 0.375rem;
  border-radius: 50%;
  background: var(--about-neon);
  box-shadow: 0 0 0 4px rgba(0, 255, 136, 0.15);
}

.page-about .about-timeline-year {
  font-family: var(--about-num-font);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--about-blue);
  display: block;
  margin-bottom: 0.625rem;
}

.page-about .about-timeline-card {
  background: var(--about-bg-card);
  border: 1px solid var(--about-line);
  padding: 1rem 1.25rem;
  max-width: 32em;
}

.page-about .about-timeline-card-title {
  font-size: 1.0625rem;
  margin: 0 0 0.375rem;
  font-family: var(--about-body-font);
  font-weight: 700;
}

.page-about .about-timeline-card-text {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--about-text-sub);
  margin: 0;
}

.page-about .about-data-wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

.page-about .about-data-visual {
  border: 1px solid var(--about-line);
  background: var(--about-bg-card);
  overflow: hidden;
}

.page-about .about-data-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-data-metrics {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .about-data-metric {
  background: var(--about-bg-deep);
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.page-about .about-data-metric-num {
  font-family: var(--about-num-font);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--about-neon);
  line-height: 1.1;
}

.page-about .about-data-metric-label {
  font-size: 0.875rem;
  color: var(--about-text-sub);
}

.page-about .about-data-note {
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--about-text-sub);
  border-left: 3px solid var(--about-blue);
  padding-left: 1rem;
  margin: 1.75rem 0 0;
  max-width: 42em;
}

.page-about .about-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  margin-bottom: 3rem;
}

.page-about .about-team-card {
  background: var(--about-bg-deep);
  padding: 1.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.page-about .about-team-num {
  font-family: var(--about-num-font);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  color: var(--about-neon);
  line-height: 1.1;
}

.page-about .about-team-card-title {
  font-size: 1rem;
  margin: 0;
  font-weight: 700;
}

.page-about .about-team-card-text {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--about-text-sub);
  margin: 0;
}

.page-about .about-cert-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  border-top: 1px solid var(--about-line);
  padding-top: 2.5rem;
}

.page-about .about-cert-art {
  border: 1px solid var(--about-line);
  overflow: hidden;
  background: var(--about-bg-card);
}

.page-about .about-cert-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-cert-desc {
  padding: 0;
}

.page-about .about-cert-title {
  font-size: 1.25rem;
  margin: 0 0 0.75rem;
}

.page-about .about-cert-text {
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--about-text-sub);
  margin: 0 0 1.5rem;
  max-width: 34em;
}

.page-about .about-cert-link {
  display: inline-block;
}

.page-about .about-cta {
  margin-top: 4rem;
  border: 1px solid var(--about-line);
  border-left: 4px solid var(--about-neon);
  background: var(--about-bg-card);
  padding: 2rem 1.25rem;
}

.page-about .about-cta-title {
  font-family: var(--about-head-font);
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  margin: 0 0 0.625rem;
}

.page-about .about-cta-text {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--about-text-sub);
  margin: 0 0 1.5rem;
  max-width: 32em;
}

.page-about .about-cta .btn,
.page-about .about-cta .btn-ghost {
  display: inline-block;
  margin-right: 0.75rem;
}

.page-about .btn {
  display: inline-block;
  background: var(--about-neon);
  color: var(--about-bg-deep);
  font-weight: 700;
  font-size: 1rem;
  padding: 0.8125rem 1.5rem;
  border: 1px solid var(--about-neon);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.page-about .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0, 255, 136, 0.2);
}

.page-about .btn-ghost {
  display: inline-block;
  border: 1px solid var(--about-blue);
  color: var(--about-blue);
  font-weight: 600;
  font-size: 1rem;
  padding: 0.8125rem 1.5rem;
  transition: background 0.2s ease, color 0.2s ease;
}

.page-about .btn-ghost:hover {
  background: var(--about-blue);
  color: var(--about-bg-deep);
}

.about-side-nav a.about-side-link {
  display: block;
  padding: 0.625rem 0;
  color: var(--about-text-sub);
  text-decoration: none;
  font-size: 0.9375rem;
  border-bottom: 1px solid var(--about-line);
  transition: color 0.2s ease;
}

.about-side-nav a.about-side-link:hover {
  color: var(--about-neon);
}

.about-side-nav a.about-side-link.data-spy-active {
  color: var(--about-neon);
  padding-left: 0.5rem;
  border-left: 3px solid var(--about-neon);
}

@media (min-width: 960px) {
  .page-about .about-shell {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 2.5rem;
  }

  .page-about .about-side {
    display: block;
    position: sticky;
    top: var(--header-h, 72px);
    align-self: start;
    height: auto;
    padding: 2.75rem 0 0;
  }

  .page-about .about-side-inner {
    padding-top: 0.5rem;
  }

  .page-about .about-side-label {
    font-family: var(--about-num-font);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    color: var(--about-text-sub);
    margin: 0 0 1.25rem;
    text-transform: uppercase;
  }

  .page-about .about-side-nav {
    margin: 0 0 2.5rem;
  }

  .page-about .about-side-nav a.about-side-link {
    padding: 0.75rem 0.25rem;
    font-size: 0.875rem;
  }

  .page-about .about-side-contact {
    display: inline-block;
    font-size: 0.875rem;
    color: var(--about-blue);
    text-decoration: none;
    border-bottom: 1px solid var(--about-line);
    padding-bottom: 0.25rem;
    transition: border-color 0.2s ease, color 0.2s ease;
  }

  .page-about .about-side-contact:hover {
    color: var(--about-neon);
    border-color: var(--about-neon);
  }

  .page-about .about-side-contact::before {
    content: "→ ";
    color: var(--about-neon);
  }

  .page-about .about-main {
    padding: 2.5rem 2.75rem 6rem 1.5rem;
  }

  .page-about .about-hero {
    padding-top: 1rem;
  }

  .page-about .about-hero-title {
    font-size: clamp(2.5rem, 5vw, 4.25rem);
    max-width: 11em;
  }

  .page-about .about-hero-desc {
    font-size: 1.0625rem;
    max-width: 36em;
  }

  .page-about .about-hero-strip-item {
    padding: 1.5rem 1.25rem;
  }

  .page-about .about-timeline-svg {
    display: block;
    position: absolute;
    top: 4rem;
    left: 0;
    width: 100%;
    max-width: 640px;
    height: auto;
  }

  .page-about .about-timeline-path {
    stroke: var(--about-blue);
    stroke-width: 2;
    stroke-dasharray: 8 6;
    opacity: 0.4;
  }

  .page-about .about-timeline-wrap {
    padding-left: 0;
  }

  .page-about .about-timeline-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
  }

  .page-about .about-timeline-list::before {
    display: none;
  }

  .page-about .about-timeline-item {
    padding: 0;
    border-left: 0;
    width: 50%;
    position: relative;
  }

  .page-about .about-timeline-item:nth-child(odd) {
    align-self: start;
    margin-top: 6rem;
  }

  .page-about .about-timeline-item:nth-child(even) {
    margin-left: auto;
    margin-top: -6rem;
  }

  .page-about .about-timeline-item::before {
    left: auto;
    top: -0.875rem;
    width: 0.5rem;
    height: 0.5rem;
  }

  .page-about .about-timeline-item:nth-child(odd)::before {
    right: -0.25rem;
  }

  .page-about .about-timeline-item:nth-child(even)::before {
    left: -0.25rem;
  }

  .page-about .about-timeline-item:nth-child(n) {
    background: transparent;
  }

  .page-about .about-timeline-card {
    padding: 1.25rem 1.5rem;
    transition: border-color 0.2s ease;
  }

  .page-about .about-timeline-card:hover {
    border-color: var(--about-neon);
  }

  .page-about .about-timeline-year {
    font-size: 1.75rem;
    margin-bottom: 0.875rem;
  }

  .page-about .about-data-wrap {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 0.8fr);
    align-items: stretch;
  }

  .page-about .about-data-visual {
    min-height: 100%;
  }

  .page-about .about-data-img {
    width: 100%;
    height: 100%;
    min-height: 320px;
    object-fit: cover;
  }

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

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

  .page-about .about-team-card {
    padding: 2rem 1.75rem;
  }

  .page-about .about-cert-row {
    grid-template-columns: 360px minmax(0, 1fr);
    gap: 2.5rem;
    align-items: center;
  }

  .page-about .about-cert-desc {
    padding: 0 1rem 0 0;
  }

  .page-about .about-cta {
    padding: 2.5rem 2rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0 1.5rem;
  }

  .page-about .about-cta-title {
    margin-bottom: 0.5rem;
    flex-basis: 100%;
  }

  .page-about .about-cta-text {
    flex-basis: 60%;
    margin-bottom: 0;
  }

  .page-about .about-cta .btn,
  .page-about .about-cta .btn-ghost {
    margin-left: auto;
    margin-right: 0.5rem;
    margin-top: 0;
  }
}