.page-about {
  --about-neon-glow: 0 0 32px rgba(155, 77, 255, 0.18);
  --about-line-soft: 1px solid rgba(200, 208, 224, 0.14);
  --about-console-bg: rgba(16, 38, 75, 0.55);
  --about-timeline-axis: rgba(155, 77, 255, 0.35);
  position: relative;
  padding: 0;
  background: transparent;
  color: var(--silver);
  font-family: var(--font-body);
}

.page-about .breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--gray-70);
}

.page-about .breadcrumb-item {
  color: var(--gray-70);
  text-decoration: none;
  transition: color 0.25s var(--ease);
}

.page-about .breadcrumb-item:hover {
  color: var(--neon-purple);
}

.page-about .breadcrumb-item.is-current {
  color: var(--silver);
}

.page-about .breadcrumb-sep {
  color: var(--gray-70);
  opacity: 0.6;
}

.page-about .about-hero {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding: 40px 24px 56px;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(155, 77, 255, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.page-about .about-hero-copy {
  position: relative;
  z-index: 2;
}

.page-about .about-hero h1 {
  font-family: var(--font-heading);
  font-size: 40px;
  line-height: 1.12;
  margin: 0 0 16px;
  color: var(--light);
  letter-spacing: 0.01em;
}

.page-about .page-lead {
  font-size: 16px;
  line-height: 1.7;
  color: var(--silver);
  max-width: 640px;
  margin: 0 0 24px;
}

.page-about .hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .hero-tags .stat-tag {
  font-family: var(--font-data);
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid rgba(200, 208, 224, 0.2);
  background: rgba(16, 38, 75, 0.5);
  letter-spacing: 0.02em;
}

.page-about .stat-tag--purple {
  color: #c89bff;
  border-color: rgba(155, 77, 255, 0.4);
}

.page-about .stat-tag--teal {
  color: var(--teal);
  border-color: rgba(0, 215, 182, 0.35);
}

.page-about .stat-tag--amber {
  color: var(--amber);
  border-color: rgba(255, 184, 107, 0.35);
}

.page-about .about-hero-orbit {
  position: relative;
  width: 260px;
  height: 260px;
  margin: 0 auto;
  flex-shrink: 0;
}

.page-about .orbit-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(200, 208, 224, 0.16);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.page-about .orbit-ring--one {
  width: 260px;
  height: 260px;
}

.page-about .orbit-ring--two {
  width: 180px;
  height: 180px;
  border-color: rgba(155, 77, 255, 0.3);
  border-style: dashed;
  animation: about-orbit-spin 24s linear infinite;
}

@keyframes about-orbit-spin {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

.page-about .orbit-core {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 72px;
  height: 72px;
  transform: translate(-50%, -50%);
  background: linear-gradient(135deg, var(--neon-purple), #4a1a8a);
  border-radius: 18px;
  box-shadow: var(--about-neon-glow);
}

.page-about .orbit-node {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 12px rgba(0, 215, 182, 0.7);
}

.page-about .orbit-node--a {
  top: 18%;
  left: 30%;
}

.page-about .orbit-node--b {
  bottom: 16%;
  right: 22%;
  background: var(--amber);
  box-shadow: 0 0 12px rgba(255, 184, 107, 0.6);
}

.page-about .orbit-node--c {
  top: 38%;
  right: 12%;
  background: var(--neon-purple);
  box-shadow: 0 0 12px rgba(155, 77, 255, 0.7);
}

.page-about .about-section {
  padding: 48px 24px;
  border-top: var(--about-line-soft);
  position: relative;
}

.page-about .section-heading {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 32px;
}

.page-about .section-index {
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--teal);
  letter-spacing: 0.08em;
}

.page-about .section-heading h2 {
  font-family: var(--font-heading);
  font-size: 30px;
  line-height: 1.2;
  color: var(--light);
  margin: 0;
}

.page-about .about-origin {
  background: linear-gradient(180deg, rgba(10, 26, 63, 0.4) 0%, transparent 100%);
}

.page-about .origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

.page-about .origin-text p {
  margin: 0 0 16px;
  line-height: 1.75;
  font-size: 15px;
  color: var(--silver);
}

.page-about .origin-intro {
  font-size: 17px;
  line-height: 1.8;
  color: var(--light);
}

.page-about .origin-quote {
  position: relative;
  margin: 28px 0;
  padding: 20px 20px 20px 44px;
  background: var(--about-console-bg);
  border-left: 3px solid var(--neon-purple);
  border-radius: 0 12px 12px 0;
}

.page-about .quote-mark {
  position: absolute;
  left: 14px;
  top: 6px;
  font-family: var(--font-heading);
  font-size: 40px;
  color: var(--neon-purple);
  line-height: 1;
}

.page-about .origin-quote p {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 18px;
  color: var(--light);
  line-height: 1.6;
}

.page-about .origin-figure {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  border: var(--about-line-soft);
  background: var(--midnight-blue);
}

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

.page-about .figure-caption {
  padding: 12px 16px;
  font-size: 12px;
  font-family: var(--font-data);
  color: var(--gray-70);
  letter-spacing: 0.03em;
  border-top: var(--about-line-soft);
}

.page-about .about-milestone {
  background: linear-gradient(180deg, rgba(16, 38, 75, 0.3) 0%, transparent 60%);
}

.page-about .milestone-toolbar {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 36px;
  padding: 16px;
  border-radius: 14px;
  background: rgba(16, 38, 75, 0.5);
  border: var(--about-line-soft);
  backdrop-filter: blur(6px);
}

.page-about .milestone-hint {
  margin: 0;
  font-size: 12px;
  font-family: var(--font-data);
  color: var(--gray-70);
  letter-spacing: 0.04em;
}

.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .filter-btn {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--silver);
  background: transparent;
  border: 1px solid rgba(200, 208, 224, 0.2);
  border-radius: 999px;
  padding: 5px 14px;
  cursor: pointer;
  transition: all 0.25s var(--ease);
  appearance: none;
}

.page-about .filter-btn:hover {
  border-color: var(--neon-purple);
  color: var(--neon-purple);
  box-shadow: var(--about-neon-glow);
}

.page-about .filter-btn.is-active {
  background: var(--neon-purple);
  border-color: var(--neon-purple);
  color: var(--light);
  box-shadow: var(--about-neon-glow);
}

.page-about .timeline {
  position: relative;
  padding-left: 24px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--about-timeline-axis), rgba(155, 77, 255, 0.08));
}

.page-about .timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 14px;
  align-items: start;
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 28px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--space-blue);
  border: 2px solid var(--neon-purple);
  box-shadow: 0 0 10px rgba(155, 77, 255, 0.4);
}

.page-about .timeline-year {
  font-family: var(--font-data);
  font-size: 18px;
  font-weight: 600;
  color: var(--teal);
  padding-top: 16px;
  white-space: nowrap;
}

.page-about .timeline-card {
  background: var(--about-console-bg);
  border: var(--about-line-soft);
  border-radius: 14px;
  padding: 18px 18px 14px;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .timeline-card:hover {
  border-color: rgba(155, 77, 255, 0.4);
  box-shadow: var(--about-neon-glow);
}

.page-about .timeline-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-heading);
  font-size: 19px;
  line-height: 1.3;
  color: var(--light);
}

.page-about .timeline-card p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--silver);
}

.page-about .timeline-meta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-about .timeline-meta .data-label {
  font-family: var(--font-data);
  font-size: 11px;
  color: var(--gray-70);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.page-about .timeline-meta .data-value {
  font-family: var(--font-data);
  font-size: 11px;
  color: var(--teal);
  background: rgba(0, 215, 182, 0.08);
  border-radius: 4px;
  padding: 2px 8px;
}

.page-about .milestone-evolution {
  margin-top: 40px;
  border-radius: 16px;
  overflow: hidden;
  border: var(--about-line-soft);
  background: var(--midnight-blue);
}

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

.page-about .about-data {
  background: linear-gradient(180deg, transparent 0%, rgba(10, 26, 63, 0.6) 100%);
}

.page-about .data-hero {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  border: var(--about-line-soft);
  margin-bottom: 36px;
}

.page-about .data-map-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-about .data-hero-overlay {
  position: static;
  padding: 16px 20px;
  background: rgba(16, 38, 75, 0.85);
  border-top: var(--about-line-soft);
}

.page-about .data-hero-overlay p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--silver);
}

.page-about .data-stats-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 32px;
}

.page-about .data-stats-grid .data-card {
  background: var(--about-console-bg);
  border: var(--about-line-soft);
  border-radius: 14px;
  padding: 20px;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .data-stats-grid .data-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--about-neon-glow);
}

.page-about .data-card-metric {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 10px;
}

.page-about .data-number {
  font-family: var(--font-data);
  font-size: 30px;
  font-weight: 700;
  color: var(--light);
  line-height: 1.1;
}

.page-about .data-unit {
  font-family: var(--font-data);
  font-size: 15px;
  color: var(--neon-purple);
}

.page-about .data-card-title {
  font-family: var(--font-heading);
  font-size: 16px;
  color: var(--light);
  margin-bottom: 8px;
  line-height: 1.3;
}

.page-about .data-card-body {
  font-size: 13px;
  line-height: 1.6;
  color: var(--gray-70);
}

.page-about .data-quality-line {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: 20px;
  border-radius: 14px;
  background: rgba(0, 215, 182, 0.04);
  border: 1px solid rgba(0, 215, 182, 0.18);
}

.page-about .quality-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--teal);
}

.page-about .data-quality-line h3 {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-size: 17px;
  color: var(--light);
}

.page-about .data-quality-line p {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--silver);
}

.page-about .about-value {
  padding-bottom: 56px;
}

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

.page-about .value-item {
  border-radius: 16px;
  padding: 24px 22px;
  border: 1px solid rgba(200, 208, 224, 0.12);
  background: rgba(16, 38, 75, 0.4);
  position: relative;
  overflow: hidden;
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .value-item:hover {
  transform: translateY(-3px);
  border-color: rgba(155, 77, 255, 0.35);
}

.page-about .value-item::after {
  content: "";
  position: absolute;
  right: -40px;
  top: -40px;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(155, 77, 255, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.page-about .value-num {
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--gray-70);
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}

.page-about .value-item h3 {
  font-family: var(--font-heading);
  font-size: 20px;
  line-height: 1.3;
  color: var(--light);
  margin: 0 0 10px;
}

.page-about .value-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--silver);
}

.page-about .value-item--blue {
  border-top: 3px solid var(--space-blue);
}

.page-about .value-item--purple {
  border-top: 3px solid var(--neon-purple);
}

.page-about .value-item--teal {
  border-top: 3px solid var(--teal);
}

.page-about .value-item--amber {
  border-top: 3px solid var(--amber);
}

.page-about .about-cta {
  padding: 48px 24px;
  border-top: var(--about-line-soft);
}

.page-about .cta-inner {
  border-radius: 20px;
  padding: 36px 24px;
  background: linear-gradient(135deg, rgba(155, 77, 255, 0.12) 0%, rgba(16, 38, 75, 0.6) 50%, rgba(10, 26, 63, 0.8) 100%);
  border: 1px solid rgba(155, 77, 255, 0.22);
  text-align: center;
  max-width: none;
}

.page-about .cta-inner h2 {
  font-family: var(--font-heading);
  font-size: 26px;
  line-height: 1.25;
  color: var(--light);
  margin: 0 0 12px;
}

.page-about .cta-inner p {
  font-size: 15px;
  line-height: 1.6;
  color: var(--silver);
  margin: 0 0 24px;
}

.page-about .cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.page-about .btn {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 22px;
  border-radius: 999px;
  text-decoration: none;
  transition: all 0.25s var(--ease);
  cursor: pointer;
  border: 1px solid transparent;
  appearance: none;
}

.page-about .btn--primary {
  background: var(--neon-purple);
  color: var(--light);
  box-shadow: var(--about-neon-glow);
}

.page-about .btn--primary:hover {
  background: #a95cff;
  transform: translateY(-1px);
  box-shadow: 0 0 36px rgba(155, 77, 255, 0.4);
}

.page-about .btn--ghost {
  background: transparent;
  border-color: rgba(200, 208, 224, 0.3);
  color: var(--silver);
}

.page-about .btn--ghost:hover {
  border-color: var(--neon-purple);
  color: var(--neon-purple);
  box-shadow: var(--about-neon-glow);
}

.page-about .btn--data {
  background: transparent;
  border-color: rgba(0, 215, 182, 0.4);
  color: var(--teal);
  font-family: var(--font-data);
  letter-spacing: 0.02em;
}

.page-about .btn--data:hover {
  background: rgba(0, 215, 182, 0.08);
  box-shadow: 0 0 24px rgba(0, 215, 182, 0.15);
}

@media (min-width: 640px) {
  .page-about .about-hero {
    grid-template-columns: 1fr 260px;
    padding: 56px 40px 72px;
    gap: 48px;
    align-items: center;
  }

  .page-about .about-section {
    padding: 64px 40px;
  }

  .page-about .origin-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .data-stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

  .page-about .values-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

  .page-about .about-cta {
    padding: 56px 40px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 88px 64px 96px;
    grid-template-columns: 1fr 320px;
  }

  .page-about .about-hero h1 {
    font-size: 56px;
    line-height: 1.08;
    max-width: 380px;
  }

  .page-about .page-lead {
    font-size: 17px;
    max-width: 560px;
  }

  .page-about .about-section {
    padding: 88px 64px;
  }

  .page-about .section-heading {
    gap: 20px;
    margin-bottom: 44px;
  }

  .page-about .section-heading h2 {
    font-size: 38px;
  }

  .page-about .milestone-toolbar {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    margin-bottom: 48px;
  }

  .page-about .milestone-hint {
    margin: 0;
  }

  .page-about .timeline {
    padding-left: 56px;
    max-width: 960px;
    margin: 0 auto;
    gap: 36px;
  }

  .page-about .timeline::before {
    left: 16px;
  }

  .page-about .timeline-item {
    grid-template-columns: 120px 1fr;
    gap: 32px;
  }

  .page-about .timeline-item::before {
    left: -44px;
    width: 12px;
    height: 12px;
  }

  .page-about .timeline-year {
    font-size: 22px;
    padding-top: 18px;
    text-align: left;
  }

  .page-about .timeline-card {
    padding: 22px 24px 18px;
  }

  .page-about .timeline-card h3 {
    font-size: 21px;
  }

  .page-about .data-stats-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }

  .page-about .data-hero-overlay {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(10, 26, 63, 0.9) 100%);
    border-top: none;
    padding: 60px 36px 24px;
  }

  .page-about .data-hero-overlay p {
    font-size: 15px;
    max-width: 520px;
  }

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

  .page-about .value-item {
    padding: 28px 24px;
  }

  .page-about .about-cta {
    padding: 64px;
  }

  .page-about .cta-inner {
    padding: 56px 48px;
  }

  .page-about .cta-inner h2 {
    font-size: 32px;
  }
}