.page-about {
  --about-gutter: clamp(20px, 4vw, 48px);
  --about-year-size: clamp(2.4rem, 5vw, 4.6rem);
  position: relative;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--about-gutter);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  overflow-x: clip;
}

.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 28px 0 16px;
  font-size: 0.78rem;
  color: var(--muted);
}

.page-about .breadcrumbs a {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid rgba(196, 255, 0, 0.3);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .breadcrumbs a:hover {
  color: var(--green-dark);
  border-color: var(--green-dark);
}

.page-about .breadcrumbs span[aria-current="page"] {
  color: var(--text);
  font-weight: 600;
}

.page-about .about-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding: 32px 0 40px;
  position: relative;
}

.page-about .about-hero__eyebrow {
  color: var(--orange);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  margin: 0 0 12px;
}

.page-about .about-hero__title {
  margin: 0;
  font-size: clamp(2rem, 5.6vw, 3.8rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.08;
  max-width: 720px;
}

.page-about .about-hero__title-accent {
  color: var(--green);
}

.page-about .about-hero__lede {
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  line-height: 1.85;
  color: var(--muted);
  max-width: 600px;
  margin: 20px 0 0;
}

.page-about .about-chapters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.page-about .about-chapters a {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  font-family: var(--font-data);
  font-size: 0.78rem;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--line);
  text-decoration: none;
  clip-path: var(--clip-1);
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-about .about-chapters a:hover {
  background: var(--green);
  color: var(--bg);
  border-color: var(--green);
  transform: translateX(4px);
}

.page-about .about-hero__visual {
  position: relative;
  overflow: hidden;
  clip-path: var(--clip-1);
  background: var(--panel);
  height: 240px;
}

.page-about .about-hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: saturate(0.8) contrast(1.15);
  opacity: 0.92;
  display: block;
}

.page-about .about-timeline {
  position: relative;
  height: 46px;
  margin: 12px 8px 8px;
}

.page-about .about-timeline__track {
  position: absolute;
  top: 18px;
  left: 2px;
  right: 2px;
  height: 2px;
  background: linear-gradient(90deg, var(--green), var(--indigo) 50%, var(--orange));
}

.page-about .about-timeline__node {
  position: absolute;
  top: 0;
  transform: translateX(-50%);
  padding: 2px 6px;
  font-family: var(--font-data);
  font-size: 0.72rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--line);
}

.page-about .about-timeline__node::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -5px;
  transform: translateX(-50%);
  width: 6px;
  height: 6px;
  background: var(--green);
  rotate: 45deg;
}

.page-about .about-section {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  padding: 52px 0 56px;
  border-top: 1px solid var(--line);
  position: relative;
}

.page-about .about-section--fast {
  background: radial-gradient(130% 90% at 88% 8%, rgba(255, 108, 0, 0.2) 0%, rgba(10, 14, 26, 0) 58%);
}

.page-about .about-section--accurate {
  background: radial-gradient(130% 90% at 82% 8%, rgba(77, 107, 254, 0.2) 0%, rgba(10, 14, 26, 0) 58%);
}

.page-about .about-section--full {
  background: radial-gradient(130% 90% at 76% 8%, rgba(196, 255, 0, 0.12) 0%, rgba(10, 14, 26, 0) 58%);
}

.page-about .about-section--stable {
  background: radial-gradient(130% 90% at 70% 8%, rgba(77, 107, 254, 0.24) 0%, rgba(10, 14, 26, 0) 60%);
}

.page-about .about-section__rail {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0 0 14px;
  border-left: 2px solid var(--indigo);
}

.page-about .rail-kicker {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--muted);
  white-space: nowrap;
}

.page-about .rail-year {
  font-family: var(--font-data);
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1;
  color: var(--green);
  white-space: nowrap;
}

.page-about .rail-unit {
  font-size: 0.55em;
  color: var(--muted);
  margin-left: 2px;
}

.page-about .rail-line {
  display: none;
}

.page-about .rail-caption {
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--muted);
  max-width: 220px;
}

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

.page-about .about-section__body .eyebrow {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--green);
  background: rgba(196, 255, 0, 0.08);
  border-left: 2px solid var(--green);
  padding: 4px 10px;
  margin: 0 0 16px;
}

.page-about .about-section h2 {
  position: relative;
  margin: 0 0 22px;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.22;
}

.page-about .about-section h2::before {
  content: "";
  display: block;
  width: 42px;
  height: 4px;
  background: var(--orange);
  margin-bottom: 16px;
}

.page-about .about-section--accurate h2::before {
  background: var(--indigo);
}

.page-about .about-section--full h2::before {
  background: var(--green);
}

.page-about .about-section--stable h2::before {
  background: linear-gradient(90deg, var(--green), var(--indigo));
}

.page-about .about-section__body p {
  margin: 0 0 16px;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
  max-width: 760px;
}

.page-about .about-section__body a {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid rgba(196, 255, 0, 0.35);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .about-section__body a:hover {
  color: var(--green-dark);
  border-color: var(--green-dark);
}

.page-about .key-sentence {
  font-weight: 700;
  color: var(--text);
  background: linear-gradient(transparent 60%, rgba(255, 108, 0, 0.25) 60%);
  padding: 0 2px;
}

.page-about .fact-list {
  list-style: none;
  padding: 0;
  margin: 28px 0 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .fact-list__item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  max-width: 500px;
  background: var(--panel);
  clip-path: var(--clip-1);
  padding: 13px 16px;
  font-size: 0.9rem;
  color: var(--muted);
}

.page-about .fact-list__marker {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  background: var(--orange);
  transform: rotate(45deg);
  position: relative;
  top: -1px;
}

.page-about .fact-list__item .data {
  color: var(--green);
  font-weight: 700;
  font-size: 0.95em;
}

.page-about .about-divert {
  display: block;
  height: 52px;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}

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

.page-about .about-divert__path {
  fill: none;
  stroke: var(--indigo);
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
}

.page-about .about-divert--alt .about-divert__path {
  stroke: var(--green);
  stroke-dasharray: 8 6;
}

.page-about .img-frame {
  position: relative;
  display: block;
  overflow: hidden;
  clip-path: var(--clip-1);
  background: var(--panel);
  margin: 28px 0;
  max-width: 980px;
}

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

.page-about .img-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 8px 14px;
  font-size: 0.72rem;
  color: var(--muted);
  background: rgba(10, 14, 26, 0.66);
  border-left: 2px solid var(--indigo);
}

.page-about .milestone-detail {
  margin: 28px 0 0;
  max-width: 760px;
  background: var(--panel);
  clip-path: var(--clip-1);
  border-top: 2px solid var(--indigo);
}

.page-about .milestone-detail summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 15px 18px;
  font-weight: 700;
  color: var(--green);
  font-size: 0.9rem;
}

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

.page-about .milestone-detail__marker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  color: var(--bg);
  background: var(--green);
  clip-path: var(--clip-1);
  font-family: var(--font-data);
  font-size: 0.85rem;
  line-height: 1;
}

.page-about .milestone-detail[open] .milestone-detail__marker {
  background: var(--orange);
}

.page-about .milestone-detail__content {
  display: grid;
  gap: 12px;
  padding: 4px 18px 20px;
}

.page-about .milestone-detail__content p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .data-chip {
  display: inline-block;
  padding: 2px 8px;
  margin-right: 6px;
  background: rgba(196, 255, 0, 0.12);
  border: 1px solid rgba(196, 255, 0, 0.3);
  color: var(--green);
  font-family: var(--font-data);
  font-size: 0.72rem;
  border-radius: 2px;
}

.page-about .coverage-visual {
  position: relative;
  margin: 28px 0;
  max-width: 520px;
}

.page-about .coverage-visual img {
  display: block;
  width: 100%;
  height: auto;
  clip-path: var(--clip-1);
  background: var(--panel);
}

.page-about .coverage-visual__badge {
  position: absolute;
  right: 6%;
  bottom: 8%;
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: var(--bg);
  border: 1px solid var(--green);
  clip-path: var(--clip-1);
}

.page-about .coverage-visual__num {
  color: var(--green);
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1;
}

.page-about .coverage-visual__label {
  color: var(--muted);
  font-size: 0.65rem;
  line-height: 1.4;
  max-width: 110px;
}

.page-about .stability-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 28px 0;
}

.page-about .stability-card {
  padding: 20px;
  background: var(--panel);
  border-top: 2px solid var(--indigo);
  clip-path: var(--clip-1);
}

.page-about .stability-card__num {
  display: block;
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--green);
  line-height: 1;
}

.page-about .stability-card .data-label {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.78rem;
}

.page-about .stability-card__desc {
  margin: 6px 0 0;
  font-size: 0.85rem;
  color: var(--text);
}

.page-about .boundary-note {
  margin-top: 24px;
  padding: 14px 16px;
  background: rgba(255, 108, 0, 0.1);
  border-left: 3px solid var(--orange);
  color: var(--muted);
  font-size: 0.85rem;
  max-width: 760px;
}

.page-about .about-summary {
  margin-top: 28px;
  padding: 48px 0 52px;
  border-top: 1px solid var(--line);
  position: relative;
  background: linear-gradient(90deg, rgba(77, 107, 254, 0.14) 0%, rgba(10, 14, 26, 0) 45%);
}

.page-about .about-summary__heading {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  color: var(--muted);
  font-weight: 600;
}

.page-about .about-summary__metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 28px;
}

.page-about .summary-metric {
  border-left: 2px solid var(--green);
  padding: 0 0 0 16px;
}

.page-about .summary-metric:nth-child(2n) {
  border-left-color: var(--orange);
}

.page-about .summary-metric__num {
  display: block;
  font-family: var(--font-data);
  font-size: var(--about-year-size);
  font-weight: 700;
  line-height: 1;
  color: var(--green);
}

.page-about .summary-metric:nth-child(2n) .summary-metric__num {
  color: var(--orange);
}

.page-about .summary-metric__label {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.5;
}

.page-about .about-crossnav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 32px 0 56px;
  border-top: 1px solid var(--line);
}

.page-about .about-crossnav__heading {
  width: 100%;
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.16em;
}

.page-about .about-crossnav .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  font-size: 0.88rem;
  text-decoration: none;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--line);
  clip-path: var(--clip-1);
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-about .about-crossnav .btn:hover,
.page-about .about-crossnav .btn:focus-visible {
  background: var(--green);
  border-color: var(--green);
  color: var(--bg);
  transform: translateY(-2px);
  outline: none;
}

@media (min-width: 700px) {
  .page-about .about-hero__visual {
    height: 320px;
  }

  .page-about .fact-list {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .page-about .fact-list__item {
    flex: 1 1 200px;
    max-width: none;
  }

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

  .page-about .about-summary__metrics {
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 56px;
    padding: 56px 0 72px;
    align-items: center;
  }

  .page-about .about-hero__visual {
    height: 480px;
  }

  .page-about .about-section {
    grid-template-columns: 220px 1fr;
    gap: 56px;
    padding: 96px 0 104px;
  }

  .page-about .about-section__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    padding: 8px 0 0 22px;
  }

  .page-about .rail-line {
    display: block;
    width: 2px;
    height: 140px;
    background: linear-gradient(var(--indigo), var(--green));
    clip-path: var(--clip-1);
    position: relative;
  }

  .page-about .rail-line::after {
    content: "";
    position: absolute;
    left: -3px;
    top: 100%;
    width: 8px;
    height: 8px;
    background: var(--green);
    rotate: 45deg;
  }

  .page-about .rail-year {
    font-size: var(--about-year-size);
  }

  .page-about .rail-caption {
    font-size: 0.83rem;
  }

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

  .page-about .about-divert {
    height: 80px;
  }

  .page-about .stability-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    max-width: 980px;
  }

  .page-about .about-crossnav .btn {
    padding: 14px 22px;
  }
}

@media (max-width: 399px) {
  .page-about .about-timeline {
    margin-left: 4px;
    margin-right: 4px;
  }

  .page-about .about-timeline__node {
    font-size: 0.62rem;
  }

  .page-about .rail-caption {
    font-size: 0.74rem;
  }

  .page-about .coverage-visual__badge {
    padding: 8px 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal],
  .page-about .about-chapters a,
  .page-about .about-crossnav .btn {
    transition: none !important;
    animation: none !important;
  }
}