.page-about {
  --about-accent: var(--electric-blue);
  position: relative;
  overflow: clip;
  color: var(--silver);
}

.page-about .breadcrumb {
  margin-top: 24px;
  margin-bottom: 40px;
}

.page-about__hero {
  position: relative;
  padding: 48px 0 56px;
  border-bottom: 2px solid var(--divider);
  background-image:
    linear-gradient(rgba(36, 50, 71, 0.45) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36, 50, 71, 0.45) 1px, transparent 1px);
  background-size: 36px 36px;
}

.page-about__hero-index {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}

.page-about__title {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(40px, 9vw, 80px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--white);
  margin: 0 0 12px;
}

.page-about__subtitle {
  font-family: var(--font-data);
  font-size: 14px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--electric-blue);
  margin-bottom: 20px;
}

.page-about__desc {
  max-width: 760px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--silver);
  margin: 0;
}

.page-about__timeline {
  padding-top: 56px;
  padding-bottom: 24px;
}

.page-about__timeline .section__header {
  margin-bottom: 8px;
}

.page-about__timeline-list {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  border-left: 2px solid var(--divider);
}

.page-about__timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 16px;
  margin: 0;
  padding: 0 0 44px 24px;
}

.page-about__timeline-item:last-child {
  padding-bottom: 0;
}

.page-about__timeline-item::before {
  content: '';
  position: absolute;
  left: -8px;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--electric-blue);
  box-shadow: 0 0 0 4px rgba(0, 163, 255, 0.18), 0 0 18px rgba(0, 163, 255, 0.7);
}

.page-about__timeline-year {
  font-family: var(--font-data);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--white);
  letter-spacing: -0.02em;
}

.page-about__timeline-body h3 {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 900;
  color: var(--white);
  margin: 0 0 8px;
}

.page-about__timeline-body p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--silver);
  margin: 0 0 12px;
}

.page-about__timeline-body .tag {
  margin-right: 8px;
}

.page-about__chart {
  margin: 40px 0 0;
  padding: 12px;
  background: var(--cyan-slate);
  border: 1px solid var(--divider);
}

.page-about__chart img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about__chart figcaption,
.page-about__network figcaption,
.page-about__seal-figure figcaption {
  padding: 12px 4px 4px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about__official {
  position: relative;
  margin-top: 48px;
  padding: 56px 0;
  border-top: 4px solid var(--divider);
  border-bottom: 4px solid var(--divider);
  background: linear-gradient(125deg, var(--deep-black) 0%, var(--cyan-slate) 100%);
}

.page-about__official::before {
  content: '';
  position: absolute;
  top: -4px;
  right: 0;
  width: 42%;
  height: 10px;
  background: var(--neon-orange);
  transform: skewX(-20deg);
  transform-origin: right top;
}

.page-about__official-main .section__header {
  margin-bottom: 20px;
}

.page-about__official-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--silver);
  margin-bottom: 24px;
}

.page-about__notice-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--fluorescent-green);
  box-shadow: 0 0 8px var(--fluorescent-green);
  margin-right: 10px;
  flex: 0 0 auto;
}

.page-about__official .notice {
  margin-bottom: 20px;
}

.page-about__official-list {
  list-style: none;
  margin: 20px 0 28px;
  padding: 0;
}

.page-about__official-list li {
  position: relative;
  padding: 10px 0 10px 28px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--silver);
  border-bottom: 1px solid var(--divider);
}

.page-about__official-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  top: 10px;
  color: var(--electric-blue);
  font-family: var(--font-data);
  font-weight: 700;
}

.page-about__official-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about__official-media {
  position: relative;
  margin-top: 40px;
}

.page-about__rotate-note {
  position: absolute;
  right: -8px;
  top: -12px;
  z-index: 2;
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  white-space: nowrap;
}

.page-about__seal-figure {
  position: relative;
  margin: 0;
  padding: 14px;
  border: 2px solid var(--divider);
  transform: skewX(-5deg);
}

.page-about__seal-figure img {
  display: block;
  width: 100%;
  height: auto;
  transform: skewX(5deg);
}

.page-about__stamp {
  position: absolute;
  right: 8px;
  bottom: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 84px;
  height: 84px;
  border: 2px solid var(--neon-orange);
  border-radius: 50%;
  color: var(--neon-orange);
  font-family: var(--font-data);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  background: rgba(10, 14, 23, 0.82);
  transform: rotate(-14deg);
}

.page-about__stamp::before {
  content: '';
  position: absolute;
  inset: 6px;
  border: 1px solid var(--neon-orange);
  border-radius: 50%;
}

.page-about__ecosystem {
  padding: 56px 0 24px;
}

.page-about__eco-metrics {
  padding-top: 28px;
}

.page-about__eco-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-about__eco-list li {
  position: relative;
  padding: 10px 0 10px 24px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--silver);
  border-bottom: 1px solid var(--divider);
}

.page-about__eco-list li::before {
  content: '◆';
  position: absolute;
  left: 0;
  top: 11px;
  color: var(--electric-blue);
  font-size: 10px;
}

.page-about__network {
  margin: 40px 0 0;
  padding: 12px;
  background: var(--cyan-slate);
  border: 1px solid var(--divider);
}

.page-about__network img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about__values {
  padding: 48px 0 8px;
}

.page-about__values-row {
  padding: 32px 0;
  border-top: 2px solid var(--divider);
  border-bottom: 2px solid var(--divider);
}

.page-about__values-row h2 {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 900;
  color: var(--white);
  margin: 12px 0 8px;
}

.page-about__values-row p {
  font-family: var(--font-data);
  font-size: 14px;
  letter-spacing: 0.14em;
  color: var(--electric-blue);
  text-transform: uppercase;
  margin: 0;
}

.page-about__subscribe {
  padding: 56px 0 0;
}

.page-about__subscribe-box {
  padding: 40px 24px;
  border: 2px solid var(--divider);
  background-image:
    linear-gradient(rgba(36, 50, 71, 0.4) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36, 50, 71, 0.4) 1px, transparent 1px);
  background-size: 32px 32px;
}

.page-about__subscribe-box h2 {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 900;
  line-height: 1.2;
  color: var(--white);
  margin: 16px 0 12px;
}

.page-about__subscribe-desc {
  max-width: 640px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--silver);
  margin-bottom: 24px;
}

.page-about__subscribe-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about__contact {
  padding: 24px 0 64px;
}

.page-about__contact-line {
  font-family: var(--font-data);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--muted);
  border-top: 1px solid var(--divider);
  padding-top: 16px;
  margin: 0;
}

.page-about__contact-line a {
  color: var(--electric-blue);
  text-decoration: none;
}

.page-about__contact-line a:hover {
  color: var(--fluorescent-green);
}

.js .page-about [data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.js .page-about [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .js .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

@media (min-width: 768px) {
  .page-about__hero {
    padding: 64px 0 80px;
    background-size: 64px 64px;
  }

  .page-about__hero-index {
    font-size: 14px;
  }

  .page-about__subtitle {
    font-size: 16px;
  }

  .page-about__timeline-item {
    grid-template-columns: 120px 1fr;
    gap: 32px;
    padding-bottom: 56px;
    padding-left: 32px;
  }

  .page-about__timeline-item::before {
    left: -8px;
    top: 8px;
  }

  .page-about__timeline-year {
    font-size: 44px;
  }

  .page-about__timeline-body h3 {
    font-size: 24px;
  }

  .page-about__timeline-body p {
    font-size: 15px;
  }

  .page-about__chart {
    margin-top: 56px;
  }

  .page-about__official {
    padding: 72px 0;
  }

  .page-about__official-media {
    margin-top: 0;
  }

  .page-about__rotate-note {
    right: -16px;
    top: -20px;
    font-size: 11px;
  }

  .page-about__values-row h2 {
    font-size: 36px;
  }

  .page-about__subscribe-box {
    padding: 56px 64px;
  }

  .page-about__subscribe-box h2 {
    font-size: 36px;
  }
}

@media (min-width: 1024px) {
  .page-about__timeline-layout {
    align-items: start;
  }

  .page-about__chart {
    position: sticky;
    top: calc(var(--header-total) + 24px);
  }

  .page-about__official-layout {
    align-items: center;
  }

  .page-about__eco-layout {
    align-items: center;
  }

  .page-about__eco-metrics {
    padding-top: 0;
  }

  .page-about__network {
    margin-top: 0;
  }

  .page-about__contact {
    padding-bottom: 80px;
  }
}