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

.page-about {
  --about-water-color: rgba(255, 255, 255, 0.05);
  background: var(--bg-default);
  color: var(--text-primary);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  padding-top: 20px;
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 48px 0 56px;
  border-bottom: 2px solid var(--border-strong);
  scroll-margin-top: 72px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--gradient-bridge);
}

.page-about .about-hero__watermark {
  position: absolute;
  right: 1%;
  bottom: -28px;
  font-family: var(--font-data);
  font-size: clamp(120px, 22vw, 250px);
  font-weight: 700;
  line-height: 1;
  color: var(--about-water-color);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero h1 {
  max-width: 760px;
  margin: 18px 0 18px;
  font-family: var(--font-head);
  font-size: clamp(28px, 6vw, 54px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.page-about .about-hero__lead {
  max-width: 660px;
  margin: 0 0 30px;
  padding-left: 18px;
  border-left: 4px solid var(--accent-blue);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  max-width: 780px;
  margin: 0;
}

.page-about .about-hero__fact {
  margin: 0;
  padding-top: 10px;
  border-top: 1px solid var(--border-line);
}

.page-about .about-hero__fact dt {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.page-about .about-hero__fact dd {
  margin: 6px 0 0;
  font-family: var(--font-data);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-data);
}

.page-about .about-section {
  padding: var(--space-section) 0;
  border-bottom: 1px solid var(--border-line);
  scroll-margin-top: 72px;
}

.page-about .about-section__head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 16px;
  align-items: start;
  margin-bottom: 32px;
}

.page-about .about-section__head .section-index {
  margin-top: 8px;
  font-family: var(--font-data);
  font-size: 13px;
  line-height: 1;
  color: var(--accent-green);
}

.page-about .about-section__head .section-title {
  grid-column: 2;
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 900;
  line-height: 1.2;
}

.page-about .about-section__head .gradient-rule {
  grid-column: 2;
  width: 96px;
  height: 3px;
}

.page-about .about-section__head .section-sub {
  grid-column: 2;
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.page-about .about-story {
  display: grid;
  gap: 26px;
  margin-top: 40px;
}

.page-about .about-story__content > p {
  max-width: 720px;
  margin: 0 0 16px;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-primary);
}

.page-about .about-story__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--border-line);
}

.page-about .about-story__list li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 12px 14px;
  border-bottom: 1px solid var(--border-line);
  border-left: 1px solid var(--border-line);
  background: rgba(19, 26, 43, 0.4);
}

.page-about .about-story__list span {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--text-secondary);
}

.page-about .about-story__list strong {
  font-family: var(--font-data);
  font-size: 20px;
  font-weight: 700;
  color: var(--accent-green);
}

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

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 2px solid var(--border-strong);
  box-shadow: var(--shadow-hard);
  background: var(--bg-layer);
}

.page-about .about-figure .figure-caption {
  margin-top: 10px;
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--text-secondary);
}

.page-about .timeline {
  position: relative;
  margin-top: 44px;
  padding-left: 24px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-blue) 0%, var(--accent-green) 55%, var(--accent-blue) 100%);
}

.page-about .timeline-phase {
  position: relative;
  margin-bottom: 30px;
}

.page-about .timeline-phase::before {
  content: "";
  position: absolute;
  left: -19px;
  top: 4px;
  width: 12px;
  height: 12px;
  border: 2px solid var(--border-strong);
  border-radius: 50%;
  background: var(--bg-default);
}

.page-about .timeline-phase--past::before {
  border-color: var(--accent-blue);
}

.page-about .timeline-phase--present::before {
  border-color: var(--accent-green);
}

.page-about .timeline-phase--future::before {
  border-color: var(--accent-blue);
}

.page-about .timeline-phase__meta {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 14px;
}

.page-about .timeline-phase__code {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--text-secondary);
  border: 1px solid var(--border-line);
  padding: 2px 6px;
}

.page-about .timeline-phase h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 900;
}

.page-about .timeline-point {
  position: relative;
  margin: 0 0 16px;
  padding: 16px 14px 16px 18px;
  border: 1px solid var(--border-line);
  border-left: 3px solid transparent;
  background: rgba(19, 26, 43, 0.5);
  transition: background 0.2s, border-color 0.2s;
}

.page-about .timeline-point:hover {
  background: rgba(26, 35, 64, 0.85);
  border-color: var(--border-strong);
  border-left-color: var(--accent-blue);
}

.page-about .timeline-point__year {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-data);
}

.page-about .timeline-point h4 {
  margin: 10px 0 6px;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 900;
}

.page-about .timeline-point p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-secondary);
}

.page-about .about-map {
  display: grid;
  gap: 26px;
  margin-top: 40px;
  align-items: start;
}

.page-about .about-map__visual {
  margin: 0;
}

.page-about .about-map__visual img {
  display: block;
  width: 100%;
  height: auto;
  border: 2px solid var(--border-strong);
  box-shadow: var(--shadow-hard);
  background: var(--bg-layer);
}

.page-about .about-map__visual .figure-caption {
  margin-top: 10px;
}

.page-about .about-map__index {
  padding: 22px 18px;
  border: 2px solid var(--border-strong);
  box-shadow: var(--shadow-hard);
  background: var(--bg-panel);
}

.page-about .about-map__legend-head {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.page-about .about-map__legend-head h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 900;
}

.page-about .about-map__legend {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-map__legend li {
  display: grid;
  grid-template-columns: 12px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-line);
  transition: background 0.2s, padding-left 0.2s;
}

.page-about .about-map__legend li:hover {
  padding-left: 6px;
  background: rgba(0, 179, 255, 0.06);
}

.page-about .about-map__legend li:last-child {
  border-bottom: 0;
}

.page-about .legend-point {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: var(--accent-blue);
  transition: transform 0.2s;
}

.page-about .legend-point--green {
  background: var(--accent-green);
}

.page-about .legend-point--cyan {
  background: var(--text-data);
}

.page-about .legend-point--orange {
  background: var(--accent-orange);
}

.page-about .about-map__legend li:hover .legend-point {
  transform: scale(1.25);
}

.page-about .about-map__legend span {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--text-secondary);
}

.page-about .about-map__legend strong {
  font-family: var(--font-data);
  font-size: 17px;
  font-weight: 700;
  color: var(--text-data);
}

.page-about .about-map__note {
  margin-top: 16px;
  padding: 12px;
  border-left: 3px solid var(--accent-blue);
  background: var(--bg-layer);
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.page-about .about-map__axis {
  display: flex;
  justify-content: space-between;
  margin-top: 14px;
  padding: 10px 8px 6px;
  border-top: 1px solid var(--border-line);
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--text-secondary);
}

.page-about .about-ops {
  display: grid;
  gap: 26px;
  margin-top: 40px;
  align-items: start;
}

.page-about .about-ops__heading {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.page-about .about-ops__heading h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 900;
}

.page-about .about-ops__flow {
  display: grid;
  gap: 12px;
}

.page-about .ops-step {
  padding: 16px;
  border: 1px solid var(--border-line);
  background: var(--bg-panel);
  transition: border-color 0.2s, background 0.2s;
}

.page-about .ops-step[open] {
  border-color: var(--border-strong);
  background: var(--bg-layer);
}

.page-about .ops-step summary {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .ops-step summary::-webkit-details-marker {
  display: none;
}

.page-about .ops-step summary::before {
  content: "+";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  border: 1px solid var(--border-line);
  font-family: var(--font-data);
  font-weight: 700;
  color: var(--accent-blue);
}

.page-about .ops-step[open] summary::before {
  content: "–";
  border-color: var(--accent-green);
  color: var(--accent-green);
}

.page-about .ops-step p {
  margin: 12px 0 0 30px;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
}

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

.page-about .about-ops__team {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 30px;
}

.page-about .team-card {
  display: grid;
  gap: 6px;
  padding: 16px;
  border: 2px solid var(--border-strong);
  background: var(--bg-panel);
}

.page-about .team-card__num {
  font-family: var(--font-data);
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  color: var(--accent-green);
}

.page-about .team-card__label {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--text-secondary);
}

.page-about .about-ops__note {
  margin-top: 22px;
  padding: 14px 16px;
  border-left: 4px solid var(--accent-orange);
  background: rgba(255, 77, 46, 0.08);
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-primary);
}

.page-about .about-links {
  padding: var(--space-section) 0;
  border-top: 2px solid var(--border-strong);
}

.page-about .about-links__inner {
  display: grid;
  gap: 14px;
}

.page-about .about-links__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 18px 16px;
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-hard);
  background: var(--bg-panel);
  text-decoration: none;
  color: var(--text-primary);
  transition: background 0.2s, border-color 0.2s;
}

.page-about .about-link span {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
}

.page-about .about-link b {
  font-family: var(--font-data);
  font-size: 16px;
  font-weight: 700;
  color: var(--accent-green);
}

.page-about .about-link:hover {
  border-color: var(--accent-blue);
  background: var(--bg-layer);
}

.page-about .about-link:focus-visible {
  outline: 2px solid var(--accent-green);
  outline-offset: 2px;
}

@media (min-width: 700px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 960px) {
  .page-about .about-story {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .timeline {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
    padding-left: 0;
    align-items: start;
  }

  .page-about .timeline::before {
    top: 12px;
    left: 0;
    right: 0;
    bottom: auto;
    width: auto;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-green), var(--accent-blue));
  }

  .page-about .timeline-phase {
    margin-bottom: 0;
    padding: 28px 8px 0;
    border-top: 2px solid var(--border-line);
  }

  .page-about .timeline-phase--past {
    border-top-color: var(--accent-blue);
  }

  .page-about .timeline-phase--present {
    border-top-color: var(--accent-green);
  }

  .page-about .timeline-phase--future {
    border-top-color: var(--accent-blue);
  }

  .page-about .timeline-phase::before {
    left: 8px;
    top: -7px;
    border-width: 2px;
    background: var(--bg-default);
  }

  .page-about .timeline-phase--past::before {
    background: var(--accent-blue);
  }

  .page-about .timeline-phase--present::before {
    background: var(--accent-green);
  }

  .page-about .timeline-phase--future::before {
    background: linear-gradient(135deg, var(--accent-green), var(--accent-blue));
  }

  .page-about .timeline-phase__meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .page-about .timeline-phase__items {
    margin-top: 16px;
  }

  .page-about .timeline-point {
    margin-left: 0;
    border-left-width: 1px;
    border-left-color: var(--border-line);
  }

  .page-about .about-map {
    grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
    gap: 32px;
  }

  .page-about .about-ops {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: 32px;
  }

  .page-about .about-links__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
  }
}