.page-about {
  --about-gold-soft: rgba(191, 155, 79, 0.16);
  --about-cyan-soft: rgba(0, 212, 255, 0.12);
  --about-cut: 18px;
  background-color: var(--deep-graphite);
  color: var(--text-bright);
  font-family: var(--body-font);
  overflow-x: hidden;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about a {
  color: var(--electric-cyan);
  text-decoration: none;
}

.page-about a:hover {
  color: var(--neon-volt);
  text-decoration: underline;
}

.page-about a:focus-visible {
  outline: 2px solid var(--neon-volt);
  outline-offset: 2px;
}

.page-about .about-cover {
  position: relative;
  min-height: 84vh;
  display: flex;
  align-items: center;
  isolation: isolate;
  overflow: hidden;
}

.page-about .about-cover-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
}

.page-about .about-cover-overlay {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(115deg, rgba(12, 15, 20, 0.96) 0%, rgba(12, 15, 20, 0.82) 42%, rgba(12, 15, 20, 0.5) 72%),
    repeating-linear-gradient(-45deg, rgba(191, 155, 79, 0.06) 0 2px, transparent 2px 14px);
}

.page-about .about-cover-content {
  width: min(100%, var(--max-width));
  margin: 0 auto;
  padding: 5rem 1.25rem 4rem;
}

.page-about .about-cover-kicker {
  font-family: var(--data-font);
  font-size: 13px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--dark-gold);
  margin: 0 0 1rem;
}

.page-about .about-cover h1 {
  margin: 0;
  font-family: var(--headline-font);
  font-size: clamp(2.6rem, 8vw, 6rem);
  line-height: 1.08;
  color: var(--text-bright);
  letter-spacing: -0.02em;
}

.page-about .about-cover-subtitle {
  margin: 0.5rem 0 0;
  font-family: var(--headline-font);
  font-size: clamp(1.1rem, 2.4vw, 1.75rem);
  color: var(--neon-volt);
}

.page-about .about-cover-lead {
  max-width: 42rem;
  margin: 1.75rem 0 2.5rem;
  font-size: clamp(1rem, 1.4vw, 1.125rem);
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-cover-index {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(138, 143, 152, 0.32);
  font-family: var(--data-font);
  font-size: 13px;
  letter-spacing: 0.06em;
}

.page-about .about-cover-index a {
  color: var(--text-bright);
  position: relative;
  padding-left: 1.25rem;
}

.page-about .about-cover-index a::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--neon-volt);
}

.page-about .about-breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 0;
  font-family: var(--data-font);
  font-size: 13px;
  color: var(--text-dim);
}

.page-about .about-layout {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 5rem;
}

@media (min-width: 1080px) {
  .page-about .about-layout {
    display: grid;
    grid-template-columns: minmax(180px, 220px) minmax(0, 780px) 1fr;
    gap: 2.5rem;
    align-items: start;
  }
}

.page-about .about-toc {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  scrollbar-width: thin;
}

.page-about .about-toc-label {
  flex-shrink: 0;
  font-family: var(--data-font);
  font-size: 13px;
  color: var(--dark-gold);
  letter-spacing: 0.16em;
  margin: 0 0.75rem 0 0;
  padding-top: 0.35rem;
}

.page-about .about-toc-link {
  flex-shrink: 0;
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.45rem 0.85rem;
  background: var(--metal-panel);
  color: var(--text-dim);
  font-family: var(--body-font);
  font-size: 14px;
  border-left: 2px solid var(--metal-gray);
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
}

.page-about .about-toc-link span {
  font-family: var(--data-font);
  color: var(--neon-volt);
  font-size: 12px;
}

.page-about .about-toc-link:hover {
  color: var(--neon-volt);
  border-left-color: var(--neon-volt);
  text-decoration: none;
}

@media (min-width: 1080px) {
  .page-about .about-toc {
    flex-direction: column;
    gap: 0.6rem;
    position: sticky;
    top: 2rem;
    overflow: visible;
  }
}

.page-about .about-content {
  min-width: 0;
}

.page-about .about-section {
  scroll-margin-top: 4rem;
  margin-top: 5rem;
}

.page-about .about-section:first-child {
  margin-top: 0;
}

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

.page-about .about-section-number {
  font-family: var(--data-font);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  line-height: 1;
  font-weight: 700;
  color: var(--dark-gold);
  letter-spacing: -0.04em;
  flex-shrink: 0;
}

.page-about .about-section-heading h2 {
  margin: 0;
  font-family: var(--headline-font);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  line-height: 1.15;
  color: var(--text-bright);
}

.page-about .about-section-kicker {
  margin: 0 0 0.3rem;
  font-family: var(--data-font);
  font-size: 13px;
  color: var(--electric-cyan);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-about .about-section-lead {
  max-width: 42rem;
  margin: 0 0 2rem;
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .about-timeline {
  position: relative;
  margin: 2.5rem 0 0;
  padding-left: 2rem;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(to bottom, var(--dark-gold), var(--electric-cyan));
}

.page-about .about-timeline-item {
  position: relative;
  margin-bottom: 1.25rem;
  background: var(--metal-panel);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  transition: background 220ms ease;
}

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: -2rem;
  top: 1.5rem;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--metal-gray);
  border: 3px solid var(--deep-graphite);
  box-shadow: 0 0 0 2px var(--neon-volt);
  transform: translateX(-50%);
  z-index: 1;
}

.page-about .about-timeline-item[open]::before {
  background: var(--neon-volt);
}

.page-about .about-timeline-item summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.1rem 1.25rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--headline-font);
  font-size: 1.125rem;
  color: var(--text-bright);
}

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

.page-about .about-timeline-tag {
  font-family: var(--data-font);
  font-size: 12px;
  font-weight: 400;
  color: var(--deep-graphite);
  background: var(--neon-volt);
  padding: 0.2rem 0.55rem;
  letter-spacing: 0.06em;
}

.page-about .about-timeline-body {
  padding: 0.6rem 1.25rem 1.2rem;
  color: var(--text-dim);
  font-size: 0.9375rem;
  line-height: 1.7;
  border-top: 1px dashed rgba(138, 143, 152, 0.3);
}

.page-about .about-data-cards {
  display: grid;
  gap: 1rem;
  margin: 0 0 2rem;
}

@media (min-width: 640px) {
  .page-about .about-data-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.page-about .about-data-card {
  position: relative;
  padding: 1.75rem 1.5rem 2rem;
  background: var(--metal-panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
  border-top: 3px solid transparent;
  transition: transform 220ms ease;
}

.page-about .about-data-card:hover {
  transform: translateY(-4px);
  border-top-color: var(--neon-volt);
}

.page-about .about-data-card::before {
  content: "";
  display: block;
  width: 96px;
  height: 96px;
  margin-bottom: 1.25rem;
  border-radius: 50%;
  -webkit-mask: radial-gradient(circle, transparent 54%, #000 55%);
  mask: radial-gradient(circle, transparent 54%, #000 55%);
}

.page-about .about-data-card:nth-child(1)::before {
  background: conic-gradient(var(--neon-volt) 0 55%, rgba(138, 143, 152, 0.18) 55% 100%);
}

.page-about .about-data-card:nth-child(2)::before {
  background: conic-gradient(var(--electric-cyan) 0 72%, rgba(138, 143, 152, 0.18) 72% 100%);
}

.page-about .about-data-card:nth-child(3)::before {
  background: conic-gradient(var(--dark-gold) 0 84%, rgba(138, 143, 152, 0.18) 84% 100%);
}

.page-about .about-data-num {
  margin: 0;
  font-family: var(--headline-font);
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1;
  color: var(--text-bright);
}

.page-about .about-data-unit {
  margin: 0.25rem 0 0;
  font-family: var(--data-font);
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--neon-volt);
}

.page-about .about-data-desc {
  margin: 0.75rem 0 0;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-dim);
}

.page-about .about-data-figure {
  margin: 2rem 0 0;
}

.page-about .about-data-figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, 90% 0, 100% 10%, 100% 100%, 0 100%);
}

.page-about .about-data-figure figcaption {
  margin-top: 0.6rem;
  font-family: var(--data-font);
  font-size: 13px;
  color: var(--metal-gray);
}

.page-about .about-mechanism-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 2rem;
}

@media (min-width: 900px) {
  .page-about .about-mechanism-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
    gap: 2.5rem;
  }
}

.page-about .about-mechanism-figure {
  margin: 0;
}

.page-about .about-mechanism-figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
}

.page-about .about-mechanism-item {
  position: relative;
  padding: 1.25rem 1.25rem 1.25rem 2rem;
  margin-bottom: 0.85rem;
  background: rgba(26, 30, 38, 0.72);
  border-left: 3px solid var(--electric-cyan);
}

.page-about .about-mechanism-item h3 {
  margin: 0 0 0.4rem;
  font-family: var(--headline-font);
  font-size: 1.125rem;
  color: var(--text-bright);
}

.page-about .about-mechanism-item p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-service-metrics {
  display: grid;
  gap: 0;
  margin: 2rem 0 1.5rem;
}

.page-about .about-service-metric {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 1rem 0;
  margin: 0;
  border-bottom: 1px dashed rgba(138, 143, 152, 0.35);
  font-size: 1rem;
  color: var(--text-bright);
}

.page-about .about-metric-code {
  font-family: var(--data-font);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--neon-volt);
  white-space: nowrap;
}

.page-about .about-service-note {
  max-width: 34rem;
  margin: 1rem 0 2rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text-dim);
  border-left: 2px solid var(--dark-gold);
  padding-left: 1rem;
}

.page-about .about-contact {
  background: var(--metal-panel);
  padding: 1.75rem 1.5rem 1.5rem;
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, var(--about-cut) 100%, 0 calc(100% - var(--about-cut)));
  border-left: 4px solid var(--dark-gold);
}

.page-about .about-contact-heading {
  margin: 0 0 0.75rem;
  font-family: var(--data-font);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dark-gold);
}

.page-about .about-contact p {
  margin: 0.35rem 0;
  font-size: 0.9375rem;
  color: var(--text-dim);
  line-height: 1.65;
}

.page-about .about-related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(138, 143, 152, 0.35);
}

.page-about .about-related-links a {
  font-family: var(--data-font);
  font-size: 13px;
  color: var(--electric-cyan);
  padding: 0.3rem 0;
  border-bottom: 1px solid transparent;
}

.page-about .about-related-links a:hover {
  color: var(--neon-volt);
  border-bottom-color: var(--neon-volt);
  text-decoration: none;
}