.page-about {
  --about-pad: 72px 0;
  --about-title-size: 2.4rem;
  position: relative;
  overflow-x: hidden;
  font-family: var(--font-body);
  font-weight: 300;
  background: var(--color-bg-cool);
  color: var(--color-text-dark);
}

.page-about .section-heading {
  font-size: var(--about-title-size);
}

.page-about .section-index {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-headings);
  font-weight: 900;
  font-size: 0.95rem;
  letter-spacing: 0.14em;
  color: var(--color-accent-warm);
  margin-bottom: 12px;
}

.page-about .section-index::after {
  content: "/";
  color: var(--color-accent-neon);
}

.page-about a:focus-visible {
  outline: 2px solid var(--color-accent-neon);
  outline-offset: 2px;
}

.page-about .breadcrumb-meta {
  margin-bottom: 32px;
  position: relative;
  z-index: 2;
}

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.85rem;
  color: rgba(244, 244, 248, 0.7);
}

.page-about .breadcrumb-list a {
  color: var(--color-accent-neon);
  text-decoration: none;
  font-weight: 500;
}

.page-about .breadcrumb-list a:hover {
  text-decoration: underline;
}

.page-about .about-hero {
  position: relative;
  padding: 40px 0 64px;
  background: var(--color-bg-deep);
  color: var(--color-text-bright);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(75, 46, 131, 0.42) 0%, transparent 42%),
    repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0 1px, transparent 1px 16px);
  pointer-events: none;
}

.page-about .about-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 36px;
  align-items: center;
}

.page-about .hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--color-accent-warm);
  text-transform: uppercase;
}

.page-about .hero-kicker::before {
  content: "";
  width: 28px;
  height: 4px;
  background: var(--color-accent-warm);
  display: inline-block;
}

.page-about .hero-title {
  margin: 18px 0 20px;
  max-width: 11em;
  font-family: var(--font-headings);
  font-size: 2.2rem;
  line-height: 1.18;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--color-text-bright);
}

.page-about .hero-lead {
  max-width: 34rem;
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.8;
  color: rgba(244, 244, 248, 0.78);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.page-about .hero-visual {
  position: relative;
}

.page-about .hero-visual::after {
  content: "";
  position: absolute;
  inset: 18px -18px -18px 18px;
  border: 2px solid var(--color-accent-neon);
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
  z-index: 0;
}

.page-about .hero-img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-about .about-story {
  padding: var(--about-pad);
  background: var(--color-bg-cool);
  color: var(--color-text-dark);
}

.page-about .story-layout {
  display: grid;
  gap: 32px;
}

.page-about .story-intro {
  max-width: 340px;
}

.page-about .story-intro .section-heading {
  margin: 0;
}

.page-about .story-body {
  max-width: 720px;
}

.page-about .story-body p {
  margin: 0 0 18px;
  font-size: 1rem;
  line-height: 1.9;
}

.page-about .story-lede {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.65;
  color: var(--color-bg-primary);
  margin-bottom: 20px;
}

.page-about .story-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 30px;
}

.page-about .story-fact {
  padding: 18px 14px;
  background: var(--color-bg-deep);
  color: var(--color-text-bright);
  border-left: 4px solid var(--color-accent-neon);
}

.page-about .fact-num {
  display: block;
  font-family: var(--font-headings);
  font-weight: 900;
  font-size: 1.75rem;
  line-height: 1.1;
  color: var(--color-accent-neon);
}

.page-about .fact-label {
  display: block;
  margin-top: 6px;
  font-size: 0.82rem;
  color: rgba(244, 244, 248, 0.72);
}

.page-about .about-milestone {
  padding: var(--about-pad);
  background: var(--color-bg-deep);
  color: var(--color-text-bright);
}

.page-about .milestone-head {
  max-width: 560px;
  margin-bottom: 28px;
}

.page-about .milestone-head p {
  margin: 18px 0 0;
  line-height: 1.7;
  color: rgba(244, 244, 248, 0.68);
}

.page-about .milestone-wrap {
  display: grid;
  gap: 28px;
  align-items: start;
}

.page-about .milestone-scroll-wrap {
  min-width: 0;
}

.page-about .timeline-scroll {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 4px 4px 20px;
  scrollbar-width: thin;
  scrollbar-color: var(--color-accent-neon) rgba(255, 255, 255, 0.08);
}

.page-about .timeline-card {
  --card-accent: var(--color-accent-neon);
  position: relative;
  flex: 0 0 72%;
  scroll-snap-align: start;
  min-height: 210px;
  padding: 28px 20px 22px 46px;
  box-sizing: border-box;
  background: rgba(42, 26, 74, 0.86);
  border: 1px solid rgba(108, 99, 255, 0.36);
  border-radius: var(--chamfer-sm);
  transition: border-color 200ms ease;
}

.page-about .timeline-card:nth-child(2) {
  --card-accent: var(--color-accent-warm);
}

.page-about .timeline-card:nth-child(3) {
  --card-accent: var(--color-border-purple);
}

.page-about .timeline-card:nth-child(4) {
  --card-accent: var(--color-accent-neon);
}

.page-about .timeline-card:nth-child(5) {
  --card-accent: var(--color-accent-warm);
}

.page-about .timeline-card:hover {
  border-color: var(--card-accent);
}

.page-about .timeline-card::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 30px;
  width: 10px;
  height: 10px;
  background: var(--card-accent);
  transform: rotate(45deg);
}

.page-about .timeline-year {
  display: inline-block;
  font-family: var(--font-headings);
  font-weight: 900;
  font-size: 1.1rem;
  letter-spacing: 0.03em;
  color: var(--card-accent);
}

.page-about .timeline-card h3 {
  margin: 10px 0 8px;
  font-family: var(--font-headings);
  font-size: 1.12rem;
  font-weight: 900;
  color: var(--color-text-bright);
}

.page-about .timeline-card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: rgba(244, 244, 248, 0.72);
}

.page-about .timeline-hint {
  margin: 12px 0 0;
  font-size: 0.8rem;
  color: rgba(244, 244, 248, 0.55);
}

.page-about .milestone-visual {
  margin: 0;
  align-self: start;
}

.page-about .milestone-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .milestone-caption {
  margin-top: 12px;
  font-size: 0.82rem;
  line-height: 1.6;
  color: rgba(244, 244, 248, 0.6);
}

.page-about .about-data {
  padding: var(--about-pad);
  background: var(--color-bg-graphite);
  color: var(--color-text-bright);
}

.page-about .data-head {
  max-width: 600px;
  margin-bottom: 36px;
}

.page-about .data-head p {
  margin: 14px 0 0;
  line-height: 1.7;
  color: rgba(244, 244, 248, 0.7);
}

.page-about .data-grid {
  display: grid;
  gap: 36px;
  align-items: center;
}

.page-about .data-visual {
  position: relative;
}

.page-about .data-visual::before {
  content: "";
  position: absolute;
  top: 24px;
  left: -24px;
  width: 100%;
  height: 100%;
  border: 2px solid var(--color-accent-warm);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
  pointer-events: none;
}

.page-about .data-chart {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .data-panel {
  display: grid;
  gap: 18px;
}

.page-about .data-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.page-about .stat-card {
  padding: 24px 16px;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-top: 3px solid var(--color-bg-primary);
}

.page-about .stat-card.stat-neon {
  border-top-color: var(--color-accent-neon);
}

.page-about .stat-card.stat-neon .stat-num {
  color: var(--color-accent-neon);
}

.page-about .stat-card.stat-warm {
  border-top-color: var(--color-accent-warm);
}

.page-about .stat-card.stat-warm .stat-num {
  color: var(--color-accent-warm);
}

.page-about .stat-card.stat-purple {
  border-top-color: var(--color-border-purple);
}

.page-about .stat-card.stat-purple .stat-num {
  color: var(--color-border-purple);
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-headings);
  font-weight: 900;
  font-size: 1.6rem;
  line-height: 1.15;
  color: var(--color-text-bright);
}

.page-about .stat-name {
  display: block;
  margin-top: 10px;
  font-size: 0.86rem;
  line-height: 1.5;
  color: rgba(244, 244, 248, 0.72);
}

.page-about .data-desc {
  max-width: 620px;
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(244, 244, 248, 0.7);
}

.page-about .about-compliance {
  padding: var(--about-pad);
  background: var(--color-bg-cool);
  color: var(--color-text-dark);
}

.page-about .compliance-layout {
  display: grid;
  gap: 36px;
}

.page-about .compliance-info {
  max-width: 620px;
}

.page-about .compliance-info p {
  margin: 16px 0 0;
  font-size: 1rem;
  line-height: 1.85;
}

.page-about .compliance-list {
  margin-top: 24px;
  display: grid;
  gap: 4px;
}

.page-about .compliance-item {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 2px;
  border-bottom: 1px solid rgba(13, 13, 26, 0.15);
}

.page-about .compliance-item dt {
  font-weight: 700;
}

.page-about .compliance-item dd {
  margin: 0;
  text-align: right;
  color: rgba(13, 13, 26, 0.78);
}

.page-about .compliance-note {
  padding: 28px;
  background: var(--color-bg-primary);
  color: var(--color-text-bright);
  border-radius: var(--chamfer-sm);
  align-self: start;
}

.page-about .compliance-note::before {
  content: "信任";
  display: inline-block;
  font-family: var(--font-headings);
  font-weight: 900;
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  color: var(--color-accent-neon);
  margin-bottom: 12px;
}

.page-about .compliance-note p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
}

.page-about .about-cta {
  padding: 60px 0;
  background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-deep) 100%);
  color: var(--color-text-bright);
}

.page-about .about-cta h2 {
  margin: 0 0 12px;
  font-family: var(--font-headings);
  font-size: 1.8rem;
  font-weight: 900;
  line-height: 1.2;
}

.page-about .about-cta p {
  max-width: 480px;
  margin: 0;
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.78);
}

.page-about .cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 26px;
}

.page-about .timeline-scroll::-webkit-scrollbar {
  height: 6px;
}

.page-about .timeline-scroll::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.08);
}

.page-about .timeline-scroll::-webkit-scrollbar-thumb {
  background: var(--color-accent-neon);
  border-radius: 3px;
}

@media (min-width: 560px) {
  .page-about .story-facts {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .timeline-card {
    flex: 0 0 46%;
  }

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

@media (min-width: 900px) {
  .page-about {
    --about-pad: 100px 0;
    --about-title-size: 3.4rem;
  }

  .page-about .about-hero {
    padding: 56px 0 96px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 64px;
  }

  .page-about .hero-title {
    font-size: 3.4rem;
  }

  .page-about .hero-lead {
    font-size: 1.08rem;
  }

  .page-about .story-layout {
    grid-template-columns: 340px 1fr;
    gap: 80px;
  }

  .page-about .story-lede {
    font-size: 1.4rem;
  }

  .page-about .milestone-wrap {
    grid-template-columns: 1fr 320px;
    gap: 48px;
  }

  .page-about .timeline-card {
    flex: 0 0 250px;
  }

  .page-about .timeline-hint {
    display: none;
  }

  .page-about .data-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 60px;
  }

  .page-about .data-stats {
    gap: 16px;
  }

  .page-about .stat-num {
    font-size: 1.9rem;
  }

  .page-about .compliance-layout {
    grid-template-columns: 1fr 0.85fr;
    gap: 80px;
  }

  .page-about .about-cta h2 {
    font-size: 2.6rem;
  }
}