.page-about {
  --rail-width: 236px;
  --ab-space: clamp(80px, 10vw, 144px);
  --ab-card-pad: clamp(24px, 3.4vw, 40px);
  --ab-line: color-mix(in srgb, var(--volt-green) 68%, transparent);
  background: var(--night-deep);
  color: var(--cold-white);
}

.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(56px, 9vw, 112px) 0 clamp(48px, 7vw, 92px);
  background:
    radial-gradient(circle at 82% 18%, rgba(255, 122, 47, 0.14) 0%, rgba(255, 122, 47, 0) 32%),
    linear-gradient(180deg, var(--night-shadow) 0%, var(--night-deep) 68%, var(--night-deep) 100%);
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  top: -40%;
  right: -8%;
  width: 47%;
  height: 180%;
  background: repeating-linear-gradient(-58deg, transparent 0 14px, rgba(198, 255, 61, 0.07) 14px 16px);
  transform: rotate(-5deg);
  pointer-events: none;
}

.page-about .ab-hero-inner {
  position: relative;
  z-index: 1;
}

.page-about .ab-crumb {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: clamp(28px, 5vw, 48px);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--mist-silver);
}

.page-about .ab-crumb a {
  color: var(--mist-silver);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 240ms var(--ease-standard), border-color 240ms var(--ease-standard);
}

.page-about .ab-crumb a:hover {
  color: var(--volt-green);
  border-color: var(--volt-green);
}

.page-about .ab-hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  font-family: var(--font-data);
  font-size: 14px;
  letter-spacing: 0.16em;
  color: var(--volt-green);
  text-transform: uppercase;
}

.page-about .ab-kicker-mark {
  width: 34px;
  height: 2px;
  background: var(--volt-green);
  display: block;
  clip-path: polygon(0 0, 100% 0, 84% 100%, 0 100%);
}

.page-about .ab-title {
  margin: 0;
  max-width: 11em;
  font-size: clamp(48px, 8vw, 104px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--cold-white);
}

.page-about .ab-title em {
  display: block;
  font-style: normal;
  color: var(--volt-green);
}

.page-about .ab-lede {
  margin: clamp(24px, 4vw, 40px) 0 0;
  max-width: 46em;
  font-size: clamp(16px, 1.4vw, 18px);
  line-height: 1.75;
  color: var(--mist-silver);
}

.page-about .ab-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 28px;
}

.page-about .ab-hero-meta .tag {
  padding: 8px 14px;
  border-radius: 0;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}

.page-about .ab-layout {
  display: block;
  padding-top: var(--ab-space);
}

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

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

.page-about .ab-mobile-index {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 0 20px;
  margin-bottom: clamp(48px, 6vw, 80px);
  scrollbar-width: none;
}

.page-about .ab-mobile-index::-webkit-scrollbar {
  display: none;
}

.page-about .ab-mobile-index a {
  flex: 0 0 auto;
  padding: 10px 14px;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--volt-green);
  background: var(--night-trench);
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
}

.page-about .ab-section {
  scroll-margin-top: calc(var(--header-height) + 20px);
}

.page-about .ab-section + .ab-section {
  margin-top: var(--ab-space);
}

.page-about .ab-section-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-about .ab-section-head .eyebrow {
  margin: 0 0 6px;
  color: var(--volt-green);
}

.page-about .ab-section-head h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.6vw, 44px);
  font-weight: 800;
  line-height: 1.16;
  color: var(--cold-white);
}

.page-about .ab-sec-num {
  font-family: var(--font-data);
  font-size: clamp(14px, 1.4vw, 18px);
  font-weight: 500;
  line-height: 1;
  color: var(--sport-orange);
  margin-top: 8px;
  letter-spacing: 0.08em;
}

.page-about .panel-title {
  margin: 0 0 14px;
  font-family: var(--font-serif);
  font-size: clamp(20px, 2vw, 24px);
  line-height: 1.3;
}

.page-about .ab-id-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
}

.page-about .ab-id-main,
.page-about .ab-id-site {
  padding: var(--ab-card-pad);
}

.page-about .ab-id-main p,
.page-about .ab-id-site p,
.page-about .ab-wb-copy p {
  margin: 0 0 12px;
}

.page-about .ab-id-site {
  background: var(--light-blue);
  color: var(--night-deep);
}

.page-about .ab-id-site .panel-title {
  color: var(--night-deep);
}

.page-about .ab-site-map {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .ab-site-map li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 13px 2px;
  border-bottom: 1px solid rgba(16, 34, 75, 0.2);
  font-size: 15px;
}

.page-about .ab-site-map li:last-child {
  border-bottom: 0;
}

.page-about .ab-site-map a {
  color: var(--night-deep);
  font-weight: 600;
  text-decoration: none;
}

.page-about .ab-site-map a:hover {
  color: var(--sport-orange);
}

.page-about .ab-site-map span {
  color: rgba(5, 11, 30, 0.6);
  font-size: 13px;
}

.page-about .ab-workbench {
  scroll-margin-top: calc(var(--header-height) + 20px);
}

.page-about .ab-wb-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .ab-wb-visual {
  margin: 0;
  position: relative;
}

.page-about .ab-wb-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(198, 255, 61, 0.1), transparent 42%);
  pointer-events: none;
  z-index: 1;
}

.page-about .ab-wb-visual img {
  width: 100%;
  height: auto;
  max-width: 100%;
  display: block;
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}

.page-about .ab-wb-visual figcaption,
.page-about .ab-road-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--mist-silver);
  letter-spacing: 0.03em;
}

.page-about .ab-clock-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}

.page-about .ab-clock-list li {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  background: var(--night-trench);
  border: 1px solid var(--steel-line);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}

.page-about .ab-clock-key {
  font-family: var(--font-data);
  font-size: 15px;
  font-weight: 500;
  color: var(--volt-green);
  letter-spacing: 0.04em;
}

.page-about .ab-clock-note {
  font-size: 15px;
  color: var(--cold-white);
  line-height: 1.5;
}

.page-about .ab-road-wrap {
  position: relative;
  margin-bottom: 28px;
}

.page-about .ab-road {
  position: relative;
  display: flex;
  justify-content: space-between;
  gap: 8px;
  padding: 42px 0 8px;
}

.page-about .ab-road::before {
  content: "";
  position: absolute;
  top: 20px;
  left: 4px;
  right: 4px;
  height: 2px;
  background: var(--steel-line);
}

.page-about .ab-road::after {
  content: "";
  position: absolute;
  top: 20px;
  left: 4px;
  width: 34%;
  height: 2px;
  background: var(--volt-green);
  z-index: 1;
}

.page-about .ab-road-node {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  padding: 4px;
  min-width: 0;
}

.page-about .ab-node-dot {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--volt-green);
  box-shadow: 0 0 0 5px rgba(198, 255, 61, 0.14);
  transition: transform 240ms var(--ease-standard), box-shadow 240ms var(--ease-standard);
}

.page-about .ab-road-node:hover .ab-node-dot {
  transform: scale(1.16);
  box-shadow: 0 0 0 9px rgba(198, 255, 61, 0.18);
}

.page-about .ab-road-node:focus-visible {
  outline: 2px solid var(--volt-green);
  outline-offset: 6px;
}

.page-about .ab-node-year {
  font-family: var(--font-data);
  font-size: 14px;
  color: var(--cold-white);
  white-space: nowrap;
}

.page-about .ab-node-label {
  font-size: 12px;
  color: var(--mist-silver);
  white-space: nowrap;
}

.page-about .ab-road-detail {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  scroll-margin-top: calc(var(--header-height) + 20px);
}

.page-about .ab-road-card {
  padding: var(--ab-card-pad);
  background: var(--night-trench);
  border: 1px solid var(--steel-line);
}

.page-about .ab-road-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 19px;
  line-height: 1.4;
  color: var(--cold-white);
}

.page-about .ab-road-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-silver);
}

.page-about .ab-road-card a {
  color: var(--volt-green);
  text-decoration: none;
}

.page-about .ab-road-card a:hover {
  text-decoration: underline;
}

.page-about .ab-road-figure {
  margin: 28px 0 0;
}

.page-about .ab-road-figure img {
  width: 100%;
  height: auto;
  max-width: 100%;
  display: block;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}

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

.page-about .ab-net-item {
  background: var(--night-trench);
  border: 1px solid var(--steel-line);
  padding: var(--ab-card-pad);
  position: relative;
}

.page-about .ab-net-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--volt-green) 0%, var(--sport-orange) 100%);
  opacity: 0.75;
}

.page-about .ab-net-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-silver);
}

.page-about .ab-net-note {
  margin: 20px 0 0;
  padding: 16px 20px;
  border-left: 3px solid var(--sport-orange);
  background: rgba(16, 34, 75, 0.5);
  color: var(--cold-white);
  font-size: 14px;
  line-height: 1.75;
}

.page-about .ab-metric-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .ab-metric-card {
  padding: var(--ab-card-pad);
  background: var(--night-trench);
  border: 1px solid var(--steel-line);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .ab-metric-num {
  font-family: var(--font-data);
  font-size: clamp(42px, 6vw, 66px);
  font-weight: 500;
  line-height: 1;
  color: var(--volt-green);
  letter-spacing: -0.03em;
}

.page-about .ab-metric-label {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--sport-orange);
}

.page-about .ab-metric-card p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist-silver);
}

.page-about .ab-metric-source {
  margin: 18px 0 0;
  font-size: 13px;
  color: var(--fog-blue);
  letter-spacing: 0.02em;
}

.page-about .ab-commit-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .ab-commit-card {
  background: var(--night-trench);
  border: 1px solid var(--steel-line);
  padding: var(--ab-card-pad);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}

.page-about .ab-commit-card p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-silver);
}

.page-about .ab-commit-card .btn {
  margin-top: 4px;
}

.page-about .ab-contact-note {
  font-size: 13px;
  color: var(--fog-blue);
  margin-top: 10px;
}

.page-about .ab-trust-note {
  margin: 28px 0 0;
  padding: 20px 24px;
  border: 1px solid var(--steel-line);
  border-left: 4px solid var(--volt-green);
  color: var(--cold-white);
  font-size: 15px;
  line-height: 1.8;
  background: linear-gradient(180deg, rgba(16, 34, 75, 0.7), rgba(5, 11, 30, 0.5));
}

.page-about .ab-ethos {
  position: relative;
  margin-top: var(--ab-space);
  min-height: 440px;
  display: flex;
  align-items: flex-end;
}

.page-about .ab-ethos-media {
  margin: 0;
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .ab-ethos-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
  display: block;
}

.page-about .ab-ethos::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(5, 11, 30, 0.24) 0%, rgba(5, 11, 30, 0.72) 62%, rgba(5, 11, 30, 0.94) 100%);
}

.page-about .ab-ethos-inner {
  position: relative;
  z-index: 2;
  padding-top: 140px;
  padding-bottom: clamp(48px, 7vw, 88px);
}

.page-about .ab-ethos-title {
  margin: 0 0 14px;
  font-family: var(--font-serif);
  font-size: clamp(34px, 5vw, 64px);
  line-height: 1.1;
  color: var(--volt-green);
  letter-spacing: -0.01em;
}

.page-about .ab-ethos-text {
  max-width: 34em;
  margin: 0 0 26px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--cold-white);
}

.page-about .ab-ethos-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .ab-ethos-links .btn + .btn {
  margin: 0;
}

@media (min-width: 720px) {
  .page-about .ab-id-grid {
    grid-template-columns: 5fr 4fr;
  }

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

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

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

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

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

@media (min-width: 1024px) {
  .page-about .ab-layout {
    display: grid;
    grid-template-columns: var(--rail-width) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 72px);
    align-items: start;
  }

  .page-about .ab-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-height) + 28px);
    padding-top: 6px;
  }

  .page-about .ab-rail-label {
    font-family: var(--font-data);
    font-size: 12px;
    letter-spacing: 0.16em;
    color: var(--mist-silver);
    text-transform: uppercase;
    margin-bottom: 14px;
  }

  .page-about .ab-rail-links {
    display: grid;
    gap: 4px;
  }

  .page-about .ab-rail-link {
    display: flex;
    align-items: baseline;
    gap: 12px;
    padding: 10px 12px;
    text-decoration: none;
    color: var(--mist-silver);
    font-size: 14px;
    border-left: 2px solid transparent;
    transition: color 240ms var(--ease-standard), border-color 240ms var(--ease-standard), background 240ms var(--ease-standard);
  }

  .page-about .ab-rail-link i {
    font-family: var(--font-data);
    font-style: normal;
    font-size: 12px;
    color: var(--steel-line);
    transition: color 240ms var(--ease-standard);
  }

  .page-about .ab-rail-link:hover {
    color: var(--volt-green);
    border-left-color: var(--volt-green);
    background: rgba(16, 34, 75, 0.4);
  }

  .page-about .ab-rail-link:hover i {
    color: var(--sport-orange);
  }

  .page-about .ab-rail-status {
    margin-top: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 12px;
    border: 1px solid var(--steel-line);
    font-size: 13px;
    color: var(--cold-white);
    background: rgba(16, 34, 75, 0.5);
  }

  .page-about .ab-pulse {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--volt-green);
    box-shadow: 0 0 0 4px rgba(198, 255, 61, 0.16);
    animation: ab-pulse 2.4s var(--ease-standard) infinite;
  }

  .page-about .ab-mobile-index {
    display: none;
  }

  .page-about .ab-wb-grid {
    grid-template-columns: 7fr 9fr;
    align-items: start;
  }

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

  .page-about .ab-metric-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@keyframes ab-pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.55;
    transform: scale(0.82);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-pulse {
    animation: none;
  }

  .page-about .ab-road-node,
  .page-about .ab-metric-card,
  .page-about [data-reveal] {
    transition: none;
    transform: none;
  }
}