.page-about {
  background: var(--color-deep-space);
  color: var(--color-off-white);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  padding-top: 28px;
}

.page-about__hero {
  padding: 48px 0 40px;
}

.page-about__hero-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

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

.page-about__hero-copy h1 {
  margin: 16px 0 20px;
  font-family: var(--font-headline);
  font-size: 40px;
  line-height: 1.18;
  letter-spacing: -0.02em;
  max-width: 16em;
}

.page-about__hero-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-ash);
  max-width: 52em;
  margin: 0;
}

.page-about__hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0;
  padding: 0;
  list-style: none;
}

.page-about__hero-points span {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  padding: 6px 10px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-carbon);
  color: var(--color-gold);
}

.page-about__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

.page-about__hero-band {
  position: relative;
  min-height: 260px;
  background: linear-gradient(135deg, var(--color-signal-red) 0%, var(--color-crimson) 100%);
  clip-path: polygon(6% 0, 100% 0, 94% 100%, 0 100%);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 12%;
}

.page-about__hero-bandmark {
  text-align: left;
  padding: 20px 0 20px 24px;
  border-left: 2px solid var(--color-gold);
}

.page-about__hero-bandmark span {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--color-off-white);
  opacity: 0.85;
}

.page-about__hero-bandmark strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 56px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-off-white);
  margin: 6px 0;
}

.page-about__hero-bandmark em {
  display: block;
  font-style: normal;
  font-size: 14px;
  letter-spacing: 0.16em;
  color: var(--color-off-white);
}

.page-about__banner {
  margin: 0 0 64px;
  padding: 0;
}

.page-about__banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow-card);
}

.page-about__banner figcaption,
.page-about__journey-hero figcaption,
.page-about__factory-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-ash);
  padding-left: 14px;
  border-left: 2px solid var(--color-gold);
}

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

.page-about__journey-hero {
  margin: 32px 0 48px;
  padding: 0;
}

.page-about__journey-hero img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 1;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
}

.page-about__timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about__timeline::before {
  content: '';
  position: absolute;
  left: 9px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--color-gold) 0%, var(--color-signal-red) 80%);
}

.page-about__tl-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  position: relative;
  padding-left: 28px;
  margin-bottom: 28px;
}

.page-about__tl-item::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--color-deep-space);
  border: 2px solid var(--color-gold);
  z-index: 1;
}

.page-about__tl-index {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about__tl-index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--color-ash);
}

.page-about__tl-year-text {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  color: var(--color-gold);
  line-height: 1;
}

.page-about__tl-card {
  background: var(--color-carbon);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: border-color 200ms ease, box-shadow 200ms ease;
}

.page-about__tl-card[open] {
  border-color: var(--color-signal-red);
  box-shadow: var(--shadow-raised);
}

.page-about__tl-card summary {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  padding: 16px 18px;
  font-size: 15px;
  line-height: 1.5;
}

.page-about__tl-card summary::-webkit-details-marker {
  display: none;
}

.page-about__tl-card summary:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: -2px;
  border-radius: var(--radius);
}

.page-about__tl-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--color-signal-red);
  border: 1px solid var(--color-signal-red);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
  white-space: nowrap;
}

.page-about__tl-title {
  font-weight: 700;
  color: var(--color-off-white);
  flex: 1 1 200px;
}

.page-about__tl-version {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--color-gold);
  white-space: nowrap;
}

.page-about__tl-icon {
  margin-left: auto;
  width: 24px;
  height: 24px;
  flex: 0 0 24px;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--color-line);
  border-radius: 50%;
  color: var(--color-gold);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
  transition: transform 200ms ease, border-color 200ms ease, color 200ms ease;
}

.page-about__tl-card[open] .page-about__tl-icon {
  transform: rotate(45deg);
  border-color: var(--color-signal-red);
  color: var(--color-signal-red);
}

.page-about__tl-body {
  padding: 0 18px 18px;
  border-top: 1px solid var(--color-line);
  margin-top: 2px;
}

.page-about__tl-body p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-ash);
}

.page-about__factory {
  background: var(--color-carbon);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  padding: 64px 0;
}

.page-about__factory-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 32px;
}

.page-about__factory-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-off-white);
  margin: 0 0 24px;
}

.page-about__factory-note {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-ash);
  margin: 24px 0 16px;
}

.page-about__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 24px 0 0;
}

.page-about__stat {
  background: var(--color-deep-space);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 18px 16px;
  transition: border-color 200ms ease;
}

.page-about__stat:hover {
  border-color: var(--color-signal-red);
}

.page-about__stat--accent {
  border-color: rgba(230, 43, 30, 0.55);
  background: linear-gradient(145deg, rgba(230, 43, 30, 0.14), transparent 70%);
}

.page-about__stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-signal-red);
}

.page-about__stat--accent .page-about__stat-num {
  color: var(--color-gold);
}

.page-about__stat-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--color-ash);
}

.page-about__factory-figure {
  margin: 0;
  padding: 0;
}

.page-about__factory-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
}

.page-about__flow {
  margin-top: 40px;
  padding: 24px;
  background: var(--color-deep-space);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.page-about__flow-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 16px;
}

.page-about__flow-title {
  font-family: var(--font-headline);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-off-white);
}

.page-about__flow-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-gold);
  letter-spacing: 0.06em;
}

.page-about__flow-svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about__flow-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.page-about__flow-list li {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-ash);
  padding: 4px 8px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
}

.page-about__mainland {
  padding: 64px 0;
}

.page-about__mainland-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 32px;
}

.page-about__mainland-card {
  position: relative;
  background: var(--color-carbon);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px 22px 28px;
  transition: border-color 200ms ease, transform 200ms ease;
}

.page-about__mainland-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 24px;
  bottom: 24px;
  width: 3px;
  background: linear-gradient(to bottom, var(--color-signal-red), var(--color-crimson));
  border-radius: 0 2px 2px 0;
  opacity: 0.8;
}

.page-about__mainland-card:hover {
  border-color: var(--color-signal-red);
  transform: translateY(-2px);
}

.page-about__mainland-card-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--color-gold);
  padding: 4px 8px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
}

.page-about__mainland-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-headline);
  font-size: 20px;
  line-height: 1.4;
  color: var(--color-off-white);
}

.page-about__mainland-card p {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-ash);
}

.page-about__next {
  padding: 24px 0 72px;
}

.page-about__next-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 32px;
}

.page-about__next-card {
  display: block;
  text-decoration: none;
  background: var(--color-carbon);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
  transition: border-color 200ms ease, background 200ms ease;
}

.page-about__next-card:hover {
  border-color: var(--color-signal-red);
  background: var(--color-deep-space);
}

.page-about__next-card:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

.page-about__next-serial {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--color-signal-red);
  margin-bottom: 8px;
}

.page-about__next-title {
  display: block;
  font-family: var(--font-headline);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-off-white);
  margin-bottom: 6px;
}

.page-about__next-desc {
  display: block;
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-ash);
}

@media (min-width: 600px) {
  .page-about__stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about__next-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about__hero-inner {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 56px;
    align-items: stretch;
  }

  .page-about__hero-copy h1 {
    font-size: 56px;
  }

  .page-about__hero-band {
    min-height: 420px;
  }

  .page-about__hero-bandmark strong {
    font-size: 72px;
  }

  .page-about__banner {
    margin-bottom: 88px;
  }

  .page-about__banner img {
    aspect-ratio: 21 / 9;
  }

  .page-about__tl-item {
    grid-template-columns: 200px 1fr;
    gap: 48px;
    padding-left: 0;
    margin-bottom: 36px;
  }

  .page-about__timeline::before {
    left: auto;
    right: auto;
    width: 1px;
    background: linear-gradient(to bottom, var(--color-gold) 0%, var(--color-signal-red) 80%);
  }

  .page-about__tl-item::before {
    left: 8px;
    top: 10px;
  }

  .page-about__tl-index {
    margin-left: 44px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    align-items: flex-start;
  }

  .page-about__tl-index-num {
    font-size: 13px;
  }

  .page-about__tl-year-text {
    font-size: 38px;
    white-space: nowrap;
  }

  .page-about__tl-card summary {
    padding: 20px 22px;
    font-size: 16px;
  }

  .page-about__tl-body {
    padding: 4px 22px 22px;
  }

  .page-about__factory {
    padding: 88px 0;
  }

  .page-about__factory-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 56px;
    align-items: start;
  }

  .page-about__mainland {
    padding: 88px 0;
  }

  .page-about__mainland-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about__next-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

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