.page-about {
  --about-rail-w: 264px;
  --about-glow-cyan: 0 0 14px rgba(0, 229, 255, 0.3);
  position: relative;
  color: var(--color-text);
  font-family: var(--font-body);
  background-color: var(--color-bg);
}

.page-about::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.045) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
  z-index: 0;
}

.page-about > .site-container {
  position: relative;
  z-index: 1;
}

.page-about a {
  color: var(--color-cyan);
}

.page-about__hero {
  padding-top: 1.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(0, 229, 255, 0.12);
}

.page-about__hero .site-kicker {
  margin-bottom: 0.5rem;
  color: var(--color-cyan);
}

.page-about__hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 6vw, 3.5rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: 0.04em;
}

.page-about__hero h1::before {
  content: '';
  display: block;
  width: 52px;
  height: 4px;
  margin-bottom: 0.9rem;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-purple));
}

.page-about__lead {
  max-width: 74ch;
  margin: 0 0 1.1rem;
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--color-dim);
}

.page-about__hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  margin: 0 0 1.4rem;
  font-size: 0.84rem;
  color: var(--color-dim);
}

.page-about__hero-meta span[aria-hidden="true"] {
  color: var(--color-purple);
}

.page-about__hero-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  margin: 0;
  padding: 1rem;
  border: 1px solid rgba(0, 229, 255, 0.18);
  background: rgba(19, 26, 42, 0.6);
}

.page-about__stat dt {
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-purple);
}

.page-about__stat dd {
  margin: 0.25rem 0 0;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
}

.page-about__layout {
  display: grid;
  gap: 2rem;
  margin-top: 1rem;
  padding-bottom: 1rem;
}

.page-about__rail-inner {
  position: relative;
  padding: 1.25rem;
  border: 1px solid rgba(0, 229, 255, 0.22);
  background: linear-gradient(165deg, rgba(19, 26, 42, 0.95), rgba(11, 8, 18, 0.9));
}

.page-about__rail-inner::before {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  width: 76px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-purple));
}

.page-about__rail-brand {
  margin-bottom: 1rem;
}

.page-about__rail-brand .site-kicker {
  margin-bottom: 0.4rem;
  color: var(--color-purple);
}

.page-about__rail-mark {
  display: block;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--color-text);
}

.page-about__rail-slogan {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.85rem;
  color: var(--color-cyan);
}

.page-about__rail-nav {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 0.9rem 0;
  border-top: 1px solid rgba(157, 78, 221, 0.25);
  font-size: 0.88rem;
}

.page-about__rail-nav a {
  display: block;
  padding-left: 0.6rem;
  border-left: 2px solid rgba(0, 229, 255, 0.3);
  color: var(--color-text);
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-about__rail-nav a:hover,
.page-about__rail-nav a:focus-visible {
  border-color: var(--color-cyan);
  color: var(--color-cyan);
}

.page-about__rail-list {
  display: grid;
  gap: 0.6rem;
  margin: 0;
  padding: 0.7rem 0;
  list-style: none;
  border-top: 1px solid rgba(157, 78, 221, 0.25);
  font-size: 0.84rem;
}

.page-about__rail-list a {
  display: inline-flex;
  align-items: flex-start;
  gap: 0.45rem;
  color: var(--color-text);
  text-decoration: none;
  padding-bottom: 0.4rem;
  border-bottom: 1px dashed rgba(0, 229, 255, 0.2);
  transition: color 0.2s ease;
}

.page-about__rail-list a:hover,
.page-about__rail-list a:focus-visible {
  color: var(--color-cyan);
}

.page-about__rail-list svg {
  flex: 0 0 14px;
  width: 14px;
  height: 14px;
  margin-top: 3px;
  color: var(--color-cyan);
  transition: color 0.2s ease;
}

.page-about__rail-list a:hover svg,
.page-about__rail-list a:focus-visible svg {
  color: var(--color-lime);
}

.page-about__rail-note {
  display: grid;
  gap: 0.3rem;
  margin-top: 0.8rem;
  padding-top: 0.9rem;
  border-top: 1px solid rgba(0, 229, 255, 0.15);
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--color-dim);
}

.page-about__rail-note p {
  margin: 0;
}

.page-about__rail-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.95rem;
  padding: 0.28rem 0.65rem;
  border: 1px solid rgba(182, 255, 0, 0.3);
  border-radius: 999px;
  font-size: 0.75rem;
  color: var(--color-lime);
}

.page-about__section {
  padding-top: 1.6rem;
}

.page-about__section-head {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid rgba(0, 229, 255, 0.12);
}

.page-about__section-no {
  flex: 0 0 auto;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 800;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--color-purple);
}

.page-about__section-head .site-kicker {
  margin-bottom: 0.25rem;
  color: var(--color-cyan);
  font-size: 0.8rem;
}

.page-about__section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.28rem, 3vw, 1.9rem);
  line-height: 1.35;
  letter-spacing: 0.02em;
}

.page-about__text-block {
  max-width: 70ch;
}

.page-about__text-block p {
  margin: 0 0 1rem;
  line-height: 1.85;
  color: rgba(234, 246, 255, 0.92);
}

.page-about__figure {
  margin: 1.5rem 0 0;
  border: 1px solid rgba(157, 78, 221, 0.25);
  background: var(--color-panel);
}

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

.page-about__figure figcaption {
  padding: 0.7rem 0.9rem;
  border-top: 1px solid rgba(0, 229, 255, 0.1);
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--color-dim);
}

.page-about__origin-grid {
  display: grid;
  gap: 1.4rem;
}

.page-about__key-list {
  display: grid;
  gap: 0.65rem;
  margin: 1.2rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about__key-list li {
  display: grid;
  gap: 0.2rem;
  padding: 0.75rem 0.85rem;
  border-left: 2px solid var(--color-cyan);
  background: rgba(19, 26, 42, 0.55);
  font-size: 0.85rem;
}

.page-about__key-list strong {
  color: var(--color-text);
}

.page-about__key-list span {
  color: var(--color-dim);
  line-height: 1.6;
}

.page-about__timeline {
  position: relative;
  display: grid;
  gap: 1.25rem;
  margin-top: 1.8rem;
  padding-left: 40px;
}

.page-about__timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, rgba(0, 229, 255, 0.45), rgba(157, 78, 221, 0.12));
}

.page-about__milestone {
  position: relative;
  padding: 0.95rem 1rem 0.95rem 1.1rem;
  border: 1px solid rgba(0, 229, 255, 0.14);
  background: rgba(19, 26, 42, 0.55);
}

.page-about__milestone-marker {
  position: absolute;
  left: -32px;
  top: 0.8rem;
  width: 16px;
  height: 16px;
  transform: rotate(45deg);
  border: 2px solid var(--color-cyan);
  background: var(--color-bg);
  box-shadow: var(--about-glow-cyan);
}

.page-about__milestone summary {
  position: relative;
  display: block;
  padding-right: 2.2rem;
  cursor: pointer;
  list-style: none;
}

.page-about__milestone summary::-webkit-details-marker {
  display: none;
}

.page-about__milestone summary::after {
  content: '+';
  position: absolute;
  top: 0;
  right: 0.3rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-cyan);
}

.page-about__milestone[open] summary::after {
  content: '−';
}

.page-about__milestone summary:hover .page-about__milestone-title {
  color: var(--color-cyan);
}

.page-about__milestone-period {
  display: block;
  margin-bottom: 0.3rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-purple);
}

.page-about__milestone-title {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--color-text);
  transition: color 0.2s ease;
}

.page-about__milestone-body {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(157, 78, 221, 0.18);
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--color-dim);
}

.page-about__milestone-body p {
  margin: 0;
}

.page-about__figure--milestones {
  margin-top: 1.6rem;
}

.page-about__data-layout {
  display: grid;
  gap: 1.5rem;
  margin-top: 0.5rem;
}

.page-about__data-list {
  display: grid;
  gap: 0.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about__data-item {
  display: grid;
  grid-template-columns: 1rem 1fr;
  gap: 0.3rem 0.7rem;
  padding: 0.8rem;
  border: 1px solid rgba(157, 78, 221, 0.22);
  background: rgba(10, 14, 23, 0.5);
}

.page-about__data-index {
  grid-row: span 2;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--color-purple);
}

.page-about__data-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--color-text);
}

.page-about__data-desc {
  font-size: 0.84rem;
  line-height: 1.6;
  color: var(--color-dim);
}

.page-about__data-visual {
  position: relative;
  margin: 0;
  padding: 0.6rem;
  border-color: rgba(0, 229, 255, 0.2);
  background: linear-gradient(145deg, rgba(19, 26, 42, 0.9), rgba(11, 8, 18, 0.85));
  overflow: hidden;
}

.page-about__data-visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about__data-scan {
  position: absolute;
  inset: 0.6rem;
  background: linear-gradient(
    180deg,
    transparent 40%,
    rgba(0, 229, 255, 0.16) 50%,
    transparent 60%
  );
  pointer-events: none;
  mix-blend-mode: screen;
  animation: page-about-scan 3.2s linear infinite;
}

.page-about__section--values {
  position: relative;
  margin-top: 2.2rem;
  padding: 1.8rem 1.4rem 1.6rem;
  border: 1px solid rgba(157, 78, 221, 0.3);
  background:
    linear-gradient(120deg, rgba(157, 78, 221, 0.07) 0 32%, transparent 32%),
    var(--color-warm);
  color: var(--color-ink);
  box-shadow: 0 0 30px rgba(245, 230, 200, 0.08);
}

.page-about__section--values .page-about__section-head {
  margin-bottom: 1.1rem;
  border-bottom-color: rgba(11, 8, 18, 0.15);
}

.page-about__section--values .site-kicker {
  color: #7A2EAD;
}

.page-about__section--values h2 {
  color: var(--color-ink);
}

.page-about__section--values .page-about__section-no {
  -webkit-text-stroke: 1px rgba(11, 8, 18, 0.55);
}

.page-about__values-grid {
  display: grid;
  gap: 1rem;
}

.page-about__value-card {
  position: relative;
  padding: 1rem;
  border: 1px solid rgba(11, 8, 18, 0.14);
  background: rgba(255, 255, 255, 0.35);
}

.page-about__value-tag {
  display: inline-block;
  margin-bottom: 0.75rem;
  padding: 0.22rem 0.55rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--color-lime);
  background: var(--color-ink);
  animation: page-about-pulse 2.8s ease-in-out infinite;
}

.page-about__value-card p {
  margin: 0 0 0.7rem;
  font-size: 0.88rem;
  line-height: 1.75;
}

.page-about__value-note {
  display: block;
  padding-top: 0.55rem;
  border-top: 1px solid rgba(11, 8, 18, 0.12);
  font-size: 0.78rem;
  line-height: 1.6;
  opacity: 0.82;
}

.page-about__cta {
  margin-top: 2.2rem;
  padding: 1.4rem 1.2rem;
  border: 1px dashed rgba(0, 229, 255, 0.3);
  background: rgba(19, 26, 42, 0.4);
}

.page-about__cta-title {
  margin: 0 0 0.8rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-text);
}

.page-about__cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.page-about__cta-note {
  margin: 0.9rem 0 0;
  font-size: 0.84rem;
  color: var(--color-dim);
}

.page-about__cta-note a {
  color: var(--color-cyan);
  text-decoration: none;
  border-bottom: 1px dashed rgba(0, 229, 255, 0.4);
}

@media (min-width: 720px) {
  .page-about__hero-stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about__origin-grid {
    grid-template-columns: 1fr 0.95fr;
    align-items: center;
  }

  .page-about__key-list {
    grid-template-columns: 1fr 1fr;
  }

  .page-about__values-grid {
    grid-template-columns: 1.15fr 0.95fr 1fr;
  }

  .page-about__section--values {
    padding-right: 1.8rem;
    padding-left: 1.8rem;
  }
}

@media (min-width: 900px) {
  .page-about__data-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.95fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about__layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(1.5rem, 4vw, 4rem);
    align-items: start;
  }

  .page-about__rail {
    position: sticky;
    top: 1.5rem;
  }

  .page-about__section {
    padding-top: 2.4rem;
  }

  .page-about__section-head {
    margin-bottom: 1.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about__data-scan,
  .page-about__value-tag {
    animation: none;
  }
}

@keyframes page-about-scan {
  0% {
    transform: translateY(-100%);
  }
  100% {
    transform: translateY(100%);
  }
}

@keyframes page-about-pulse {
  0%,
  100% {
    transform: translateY(0);
    box-shadow: 0 0 0 0 rgba(182, 255, 0, 0);
  }
  50% {
    transform: translateY(-3px);
    box-shadow: 0 0 18px rgba(182, 255, 0, 0.45);
  }
}