.page-about {
  --about-line: rgba(184, 255, 60, 0.35);
  position: relative;
}

.about-hero {
  position: relative;
  padding: 40px 0 32px;
  border-bottom: 1px solid rgba(139, 149, 165, 0.25);
  overflow: hidden;
}

.about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 45%;
  height: 100%;
  background-image:
    linear-gradient(rgba(79, 209, 255, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79, 209, 255, 0.09) 1px, transparent 1px);
  background-size: 32px 32px;
  clip-path: polygon(24% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.about-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.about-hero-main .breadcrumbs {
  margin-bottom: 18px;
}

.breadcrumbs-sep {
  margin: 0 6px;
  color: var(--color-muted);
}

.about-hero-main h1 {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: 28px;
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 10px 0 16px;
  color: var(--color-text);
}

.about-hero-lead {
  font-size: 15px;
  line-height: 1.75;
  color: rgba(232, 236, 244, 0.82);
  max-width: 56em;
  margin-bottom: 22px;
}

.about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.about-hero-aside {
  display: flex;
  justify-content: flex-end;
}

.hero-aside-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid rgba(139, 149, 165, 0.3);
  border-radius: var(--radius);
  padding: 16px;
  min-width: 180px;
  text-align: right;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.2);
}

.hero-aside-card::after {
  content: "";
  position: absolute;
  right: -1px;
  top: 14px;
  width: 4px;
  height: 40px;
  background: var(--color-accent);
  transform: skewX(-8deg);
}

.hero-aside-card .tag-index {
  display: inline-block;
  margin-bottom: 10px;
}

.hero-aside-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  text-decoration: none;
  color: var(--color-accent);
  padding: 4px 0;
}

.hero-aside-link:hover .hero-aside-arrow {
  transform: translateX(-3px);
}

.hero-aside-arrow {
  display: inline-block;
  font-size: 22px;
  transition: transform var(--transition);
}

.hero-aside-coord {
  display: block;
  margin-top: 8px;
  font-size: 11px;
  color: var(--color-muted);
}

.about-toc {
  padding: 18px 0;
  border-bottom: 1px solid rgba(139, 149, 165, 0.18);
}

.toc-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.toc-link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--color-muted);
  text-decoration: none;
  padding: 6px 0;
  border-bottom: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.toc-link:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.about-brand-sec {
  padding: 48px 0;
}

.brand-sec-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.brand-sec-intro {
  max-width: 420px;
}

.sec-code {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--color-accent-2);
  margin-bottom: 6px;
}

.brand-sec-intro h2,
.timeline-sec-head h2,
.production-copy h2,
.stats-copy h2,
.local-paper h2 {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: 26px;
  line-height: 1.2;
  margin: 8px 0 12px;
  color: var(--color-text);
}

.brand-sec-intro p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(232, 236, 244, 0.78);
  margin-bottom: 18px;
}

.brand-archive-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid rgba(139, 149, 165, 0.35);
  border-radius: var(--radius);
  padding: 20px 18px;
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.18);
  transform: rotate(-0.4deg);
  transition: transform var(--transition), box-shadow var(--transition);
}

.brand-archive-card::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 34px;
  width: 4px;
  height: 80px;
  background: var(--color-accent);
}

.brand-archive-card::after {
  content: "";
  position: absolute;
  right: -1px;
  bottom: 18px;
  width: 26px;
  height: 14px;
  background: var(--color-accent-2);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 8px 100%, 0 55%);
}

.brand-archive-card:hover {
  transform: rotate(0deg) translateY(-3px);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.25);
}

.archive-card-ribbon {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 16px;
  border-bottom: 1px dashed rgba(139, 149, 165, 0.35);
  padding-bottom: 12px;
}

.archive-list {
  margin: 0;
  padding: 0;
}

.archive-row {
  display: grid;
  grid-template-columns: 104px 1fr;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(139, 149, 165, 0.12);
}

.archive-row dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--color-muted);
  padding-top: 2px;
}

.archive-row dd {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin: 0;
  text-align: right;
}

.archive-expand {
  margin-top: 14px;
  border: 1px solid rgba(79, 209, 255, 0.25);
  border-radius: var(--radius);
  background: rgba(79, 209, 255, 0.04);
}

.archive-expand summary {
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-info);
  padding: 10px 14px;
  list-style: none;
}

.archive-expand summary::-webkit-details-marker {
  display: none;
}

.archive-expand[open] summary {
  border-bottom: 1px solid rgba(79, 209, 255, 0.2);
}

.archive-expand p {
  margin: 0;
  padding: 12px 14px;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(232, 236, 244, 0.78);
}

.about-timeline-sec {
  padding: 48px 0 56px;
  overflow: hidden;
}

.timeline-sec-head {
  max-width: 640px;
  margin-bottom: 32px;
}

.timeline-sec-head p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(232, 236, 244, 0.78);
}

.timeline-stage {
  position: relative;
  border-top: 1px solid rgba(139, 149, 165, 0.22);
  border-bottom: 1px solid rgba(139, 149, 165, 0.22);
  padding: 24px 0;
}

.timeline-stage-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

.timeline-stage-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
  filter: grayscale(0.8);
}

.timeline-list {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0;
  padding: 0;
}

.timeline-entry {
  position: relative;
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 14px;
  align-items: start;
  padding: 16px 0;
}

.timeline-entry:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 23px;
  top: 40px;
  bottom: -8px;
  width: 1px;
  background: var(--about-line);
}

.timeline-marker {
  text-align: center;
}

.timeline-dot {
  display: block;
  width: 14px;
  height: 14px;
  margin: 4px auto 8px;
  border-radius: 50%;
  background: var(--color-accent-2);
  box-shadow: 0 0 0 5px rgba(184, 255, 60, 0.12);
  transition: transform var(--transition), box-shadow var(--transition);
}

.timeline-year {
  font-size: 11px;
  font-weight: 700;
  color: var(--color-accent-2);
  white-space: nowrap;
}

.timeline-panel {
  background: var(--color-surface);
  border: 1px solid rgba(139, 149, 165, 0.3);
  border-radius: var(--radius);
  padding: 16px;
  transition: transform var(--transition), box-shadow var(--transition);
}

.timeline-panel:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.22);
}

.timeline-panel-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}

.timeline-panel h3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  line-height: 1.25;
  margin: 0 0 6px;
  color: var(--color-text);
}

.timeline-panel p {
  font-size: 13px;
  line-height: 1.65;
  color: rgba(232, 236, 244, 0.76);
  margin: 0;
}

.about-production-sec {
  padding: 48px 0;
  border-top: 1px solid rgba(139, 149, 165, 0.18);
}

.production-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.production-copy > p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(232, 236, 244, 0.78);
  margin-bottom: 18px;
}

.production-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.production-li {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 10px;
  align-items: start;
  background: rgba(28, 37, 65, 0.6);
  border: 1px solid rgba(139, 149, 165, 0.18);
  border-radius: var(--radius);
  padding: 12px 14px;
}

.production-li .status-dot {
  margin-top: 6px;
}

.production-li strong {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-text);
}

.production-li p {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(232, 236, 244, 0.72);
  margin: 4px 0 0;
}

.production-side {
  display: grid;
  gap: 16px;
  align-content: start;
}

.production-schedule {
  background: var(--color-surface);
  border: 1px solid rgba(139, 149, 165, 0.3);
  border-radius: var(--radius);
  padding: 16px;
}

.production-schedule h3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 16px;
  margin: 0 0 12px;
  color: var(--color-text);
}

.schedule-list {
  margin: 0;
  padding: 0;
}

.schedule-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 6px 0;
  border-bottom: 1px dashed rgba(139, 149, 165, 0.2);
  font-size: 13px;
}

.schedule-row:last-child {
  border-bottom: none;
}

.schedule-row dt {
  color: var(--color-muted);
}

.schedule-row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--color-accent-2);
  text-align: right;
}

.production-visual {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(139, 149, 165, 0.3);
}

.production-visual::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 28px;
  height: 28px;
  background: var(--color-accent);
  clip-path: polygon(100% 0, 100% 100%, 0 0);
}

.production-visual img {
  display: block;
  width: 100%;
  height: auto;
}

.production-caption {
  font-size: 11px;
  color: var(--color-muted);
  text-align: right;
  margin: -8px 0 0;
}

.about-stats-sec {
  padding: 48px 0;
}

.stats-banner {
  position: relative;
  background: var(--color-surface);
  border: 1px solid rgba(139, 149, 165, 0.3);
  border-radius: var(--radius);
  overflow: hidden;
  padding: 24px 18px;
}

.stats-banner-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.stats-banner-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.12;
}

.stats-copy {
  position: relative;
  z-index: 1;
  max-width: 520px;
  margin-bottom: 24px;
}

.stats-copy p {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(232, 236, 244, 0.76);
}

.stats-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 0;
  padding: 0;
}

.stat-card {
  background: rgba(11, 19, 43, 0.72);
  border: 1px solid rgba(139, 149, 165, 0.25);
  border-radius: var(--radius);
  padding: 16px 14px;
}

.stat-card dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--color-muted);
}

.stat-num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.1;
  margin: 6px 0 2px;
}

.stat-card:nth-child(2) .stat-num {
  color: var(--color-accent-2);
}

.stat-card:nth-child(3) .stat-num {
  color: var(--color-info);
}

.stat-card:nth-child(4) .stat-num {
  color: var(--color-accent);
}

.stat-unit {
  font-size: 12px;
  color: rgba(232, 236, 244, 0.72);
}

.stats-note {
  position: relative;
  z-index: 1;
  margin-top: 16px;
  font-size: 11px;
  color: var(--color-muted);
  border-top: 1px solid rgba(139, 149, 165, 0.25);
  padding-top: 10px;
}

.about-local-sec {
  padding: 48px 0 56px;
  border-top: 1px solid rgba(139, 149, 165, 0.18);
}

.local-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.local-paper {
  background: var(--color-paper);
  color: var(--color-ink);
  border-radius: var(--radius);
  padding: 28px 22px 34px;
  position: relative;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.local-paper .sec-code {
  color: rgba(26, 20, 35, 0.6);
}

.local-paper .index-label {
  color: rgba(26, 20, 35, 0.7);
}

.local-paper h2 {
  color: var(--color-ink);
}

.local-paper > p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(26, 20, 35, 0.82);
  max-width: 52em;
}

.local-list {
  list-style: none;
  margin: 16px 0 20px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.local-list li {
  position: relative;
  padding-left: 20px;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(26, 20, 35, 0.88);
}

.local-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  transform: rotate(45deg);
}

.local-paper .btn-primary {
  margin-top: 8px;
}

.local-side {
  background: rgba(28, 37, 65, 0.6);
  border: 1px solid rgba(139, 149, 165, 0.25);
  border-radius: var(--radius);
  padding: 20px;
}

.local-side h3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17px;
  margin: 8px 0 8px;
  color: var(--color-text);
}

.local-side > p {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(232, 236, 244, 0.76);
  margin-bottom: 14px;
}

.local-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-bottom: 14px;
}

.local-nav a {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-info);
  text-decoration: none;
  padding: 6px 0;
  border-bottom: 1px dashed rgba(79, 209, 255, 0.3);
  transition: color var(--transition);
}

.local-nav a:hover {
  color: var(--color-accent);
}

.local-feedback {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--color-muted);
  border-top: 1px solid rgba(139, 149, 165, 0.2);
  padding-top: 10px;
}

.about-brand-sec,
.about-timeline-sec,
.about-production-sec,
.about-stats-sec,
.about-local-sec {
  scroll-margin-top: 88px;
}

.about-brand-sec:target,
.about-timeline-sec:target,
.about-production-sec:target,
.about-stats-sec:target,
.about-local-sec:target {
  box-shadow: inset 3px 0 0 var(--color-accent);
}

.about-brand-sec[data-in-view="true"] .brand-archive-card {
  transform: rotate(0deg) translateY(-2px);
}

.about-brand-sec[data-in-view="true"] .brand-archive-card:hover {
  transform: rotate(0deg) translateY(-4px);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.25);
}

.about-timeline-sec[data-in-view="true"] .timeline-dot {
  transform: scale(1.25);
  box-shadow: 0 0 0 10px rgba(184, 255, 60, 0.18);
}

@media (min-width: 768px) {
  .about-hero {
    padding: 64px 0 48px;
  }

  .about-hero-grid {
    grid-template-columns: 1fr 260px;
    align-items: start;
    gap: 36px;
  }

  .about-hero-main h1 {
    font-size: 40px;
  }

  .toc-row {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 24px;
  }

  .toc-link {
    padding: 4px 0;
  }

  .brand-sec-grid {
    grid-template-columns: 340px 1fr;
    gap: 48px;
    align-items: start;
  }

  .brand-archive-card {
    padding: 26px 24px;
  }

  .archive-row {
    grid-template-columns: 140px 1fr;
  }

  .timeline-stage {
    padding: 32px 0;
  }

  .timeline-entry {
    grid-template-columns: 80px 1fr;
    gap: 28px;
  }

  .timeline-entry:not(:last-child)::before {
    left: 40px;
  }

  .timeline-panel {
    padding: 20px;
  }

  .timeline-panel h3 {
    font-size: 20px;
  }

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

  .stats-banner {
    padding: 36px 32px;
  }

  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }

  .stat-card {
    padding: 20px;
  }

  .stat-num {
    font-size: 30px;
  }

  .local-layout {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 32px;
    align-items: start;
  }

  .local-paper {
    padding: 36px 32px 44px;
  }
}

@media (min-width: 1024px) {
  .about-hero-main h1 {
    font-size: 48px;
  }

  .about-hero-lead {
    font-size: 16px;
  }

  .about-hero-grid {
    grid-template-columns: 1fr 300px;
  }

  .timeline-entry {
    grid-template-columns: 100px 1fr;
  }

  .timeline-entry:not(:last-child)::before {
    left: 50px;
  }

  .timeline-year {
    font-size: 12px;
  }

  .brand-sec-intro h2,
  .timeline-sec-head h2,
  .production-copy h2,
  .stats-copy h2,
  .local-paper h2 {
    font-size: 32px;
  }
}