.page-about {
  --about-line: rgba(192, 192, 192, 0.16);
  --about-red-soft: rgba(230, 57, 70, 0.14);
  --about-yellow-soft: rgba(255, 215, 0, 0.18);
  position: relative;
  background:
    radial-gradient(ellipse at 90% 8%, var(--about-red-soft), transparent 42%),
    radial-gradient(ellipse at 0% 62%, var(--about-yellow-soft), transparent 36%),
    var(--color-black);
}

.page-about::before {
  content: "辽";
  position: absolute;
  top: 10%;
  right: -0.18em;
  z-index: 0;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: 34vw;
  line-height: 0.8;
  color: rgba(230, 57, 70, 0.045);
  pointer-events: none;
  user-select: none;
}

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

.page-about .breadcrumb {
  margin: 1.25rem 0 2.75rem;
}

.page-about .section-head {
  margin-bottom: 2rem;
  max-width: 52rem;
}

.page-about .section-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 0.8;
  color: rgba(230, 57, 70, 0.3);
  margin-bottom: 0.875rem;
  letter-spacing: -0.04em;
}

.page-about .section-head h2 {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  line-height: 1.1;
  color: var(--color-light);
  margin: 0.5rem 0 0.625rem;
}

.page-about .section-sub {
  font-size: 0.95rem;
  color: var(--color-silver-gray);
  line-height: 1.7;
  margin: 0;
}

.page-about .about-rule {
  height: 1px;
  margin: 0 0 5rem;
  background: linear-gradient(90deg, transparent, var(--about-line) 28%, var(--about-line) 72%, transparent);
  position: relative;
}

.page-about .about-rule::after {
  content: "";
  position: absolute;
  top: -3px;
  left: 50%;
  width: 7px;
  height: 7px;
  transform: translateX(-50%) rotate(45deg);
  background: var(--color-red);
}

.page-about .about-hero {
  display: grid;
  gap: 2.5rem;
  margin-bottom: 5rem;
  padding-top: 0.75rem;
  position: relative;
}

.page-about .hero-copy {
  max-width: 46rem;
}

.page-about .hero-copy h1 {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(2rem, 5vw, 3.75rem);
  line-height: 1.06;
  letter-spacing: 0.01em;
  color: var(--color-light);
  margin: 0.875rem 0 1.25rem;
  text-wrap: balance;
}

.page-about .hero-lead {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-yellow);
  margin-bottom: 0.875rem;
  letter-spacing: 0.01em;
}

.page-about .hero-desc {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--color-silver-gray);
  max-width: 35rem;
  margin: 0;
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
  margin-top: 1.875rem;
}

.page-about .hero-mark {
  display: block;
  width: 100%;
  max-width: 340px;
  margin: 0 auto;
}

.page-about .hero-mark svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .story-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.page-about .story-image {
  margin: 0;
  position: relative;
}

.page-about .story-image::after {
  content: "";
  position: absolute;
  right: 0.75rem;
  bottom: 0.75rem;
  width: 48px;
  height: 48px;
  border-right: 3px solid var(--color-red);
  border-bottom: 3px solid var(--color-yellow);
  opacity: 0.7;
  pointer-events: none;
}

.page-about .story-copy p {
  line-height: 1.95;
  margin: 0 0 1rem;
  color: var(--color-silver-gray);
  font-size: 0.975rem;
}

.page-about .story-copy p:last-child {
  margin-bottom: 0;
}

.page-about .story-copy strong {
  color: var(--color-light);
  font-weight: 600;
}

.page-about .milestone-stage {
  display: grid;
  gap: 2.75rem;
}

.page-about .milestone-photo {
  margin: 0;
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .milestone-photo img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.88) contrast(1.06);
}

.page-about .milestone-photo::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 58%;
  background: linear-gradient(180deg, transparent, rgba(10, 10, 10, 0.76) 92%);
  pointer-events: none;
}

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

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-red) 0%, var(--color-silver) 58%, var(--color-yellow) 100%);
  opacity: 0.72;
}

.page-about .timeline-item {
  position: relative;
  padding-left: 2.375rem;
  margin-bottom: 1.75rem;
}

.page-about .tl-mark {
  position: absolute;
  left: 0;
  top: 0.4rem;
  width: 16px;
  height: 16px;
  display: grid;
  place-items: center;
  color: var(--color-red);
}

.page-about .tl-mark svg {
  width: 16px;
  height: 16px;
  background: var(--color-black);
  border-radius: 2px;
}

.page-about .tl-body {
  background: linear-gradient(150deg, var(--color-gray), var(--color-black));
  border: 1px solid rgba(192, 192, 192, 0.13);
  border-left: 3px solid var(--color-red);
  border-radius: var(--radius);
  padding: 1rem 1.125rem;
  transition: transform 0.28s var(--ease), border-color 0.28s var(--ease), box-shadow 0.28s var(--ease);
}

.page-about .timeline-item:hover .tl-body,
.page-about .timeline-item:focus-within .tl-body {
  transform: translateX(4px);
  border-color: var(--color-yellow);
  box-shadow: 0 0 0 1px rgba(255, 215, 0, 0.22), 0 14px 30px rgba(0, 0, 0, 0.38);
}

.page-about .tl-year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-yellow);
  background: var(--color-carbon);
  border-radius: 2px;
  padding: 0.2rem 0.55rem;
  margin-bottom: 0.5rem;
}

.page-about .tl-body h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-light);
  margin: 0 0 0.35rem;
}

.page-about .tl-body p {
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--color-silver-gray);
  margin: 0;
}

.page-about .stat-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
  margin: 2rem 0 3rem;
}

.page-about .stat-card {
  padding: 1.5rem 1.25rem;
  background: linear-gradient(160deg, var(--color-gray), var(--color-black));
  border: 1px solid rgba(192, 192, 192, 0.14);
  border-top: 3px solid var(--color-red);
  border-radius: var(--radius);
  transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease);
}

.page-about .stat-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.875rem, 5vw, 2.625rem);
  font-weight: 700;
  color: var(--color-yellow);
  line-height: 1.1;
  margin-bottom: 0.55rem;
  letter-spacing: -0.03em;
}

.page-about .stat-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-light);
  margin-bottom: 0.3rem;
}

.page-about .stat-note {
  display: block;
  font-size: 0.8125rem;
  color: var(--color-silver-gray);
  line-height: 1.55;
}

.page-about .data-feature-grid {
  display: grid;
  gap: 1rem;
  margin: 2.5rem 0 1rem;
}

.page-about .feature-block {
  background:
    linear-gradient(135deg, var(--about-red-soft), transparent 52%),
    var(--color-gray);
  border: 1px solid rgba(192, 192, 192, 0.13);
  border-left: 3px solid var(--color-yellow);
  border-radius: var(--radius);
  padding: 1.5rem 1.5rem 1.75rem;
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .feature-block::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--color-red) 0 50%, transparent 50% 100%);
  opacity: 0.45;
  pointer-events: none;
}

.page-about .feature-block:hover {
  border-color: var(--color-silver);
  transform: translateY(-3px);
}

.page-about .feature-block h3 {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-light);
  margin-bottom: 0.75rem;
  line-height: 1.55;
}

.page-about .feature-block p {
  font-size: 0.875rem;
  line-height: 1.82;
  color: var(--color-silver-gray);
  margin: 0;
}

.page-about .cred-layout {
  display: grid;
  gap: 2rem;
  margin-top: 2rem;
}

.page-about .cred-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-about .cred-item {
  display: grid;
  grid-template-columns: 2.75rem 1fr;
  gap: 1rem;
  align-items: start;
  padding: 1.25rem;
  background: var(--color-gray);
  border: 1px solid rgba(192, 192, 192, 0.13);
  border-radius: var(--radius);
  transition: border-color 0.28s var(--ease), background 0.28s var(--ease);
}

.page-about .cred-item:hover,
.page-about .cred-item:focus-within {
  border-color: rgba(230, 57, 70, 0.55);
  background: linear-gradient(135deg, var(--color-gray), var(--color-carbon));
}

.page-about .cred-no {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-red);
  line-height: 1;
}

.page-about .cred-item h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-light);
  margin: 0 0 0.5rem;
  line-height: 1.5;
}

.page-about .cred-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-yellow);
  border: 1px solid rgba(255, 215, 0, 0.42);
  border-radius: 999px;
  padding: 0.1rem 0.55rem;
  margin-bottom: 0.5rem;
}

.page-about .cred-item p:last-child {
  font-size: 0.875rem;
  line-height: 1.78;
  color: var(--color-silver-gray);
  margin: 0;
}

.page-about .cred-partner {
  background: var(--color-carbon);
  border: 1px solid rgba(192, 192, 192, 0.15);
  border-radius: var(--radius);
  padding: 1.5rem;
  position: relative;
}

.page-about .partner-image {
  margin: 0 0 1.5rem;
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .cred-partner h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-light);
  margin: 0 0 1rem;
  position: relative;
  padding-bottom: 0.625rem;
}

.page-about .cred-partner h3::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 2.5rem;
  height: 3px;
  background: var(--color-red);
}

.page-about .partner-list {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.page-about .partner-list li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--color-silver-gray);
}

.page-about .partner-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 8px;
  height: 8px;
  transform: rotate(45deg);
  background: var(--color-red);
}

.page-about .partner-scale {
  font-size: 0.85rem;
  color: var(--color-silver-gray);
  line-height: 1.75;
  margin: 0;
  border-top: 1px solid rgba(192, 192, 192, 0.14);
  padding-top: 1rem;
}

.page-about .about-cta {
  background:
    linear-gradient(120deg, var(--about-red-soft), transparent 48%),
    var(--color-gray);
  border: 1px solid rgba(192, 192, 192, 0.16);
  border-radius: var(--radius);
  padding: 2.5rem 1.5rem;
  margin: 4rem 0 1rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, var(--color-red) 0 42%, var(--color-silver) 42% 52%, var(--color-yellow) 52% 100%);
  opacity: 0.9;
}

.page-about .cta-inner {
  max-width: 42rem;
  margin: 0 auto;
}

.page-about .about-cta h2 {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.5rem, 3.6vw, 2.5rem);
  line-height: 1.2;
  color: var(--color-light);
  margin: 0 0 0.75rem;
}

.page-about .about-cta p {
  color: var(--color-silver-gray);
  line-height: 1.8;
  margin: 0 0 1.5rem;
}

.page-about .cta-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.875rem;
}

@media (min-width: 40rem) {
  .page-about .stat-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .page-about .milestone-photo {
    aspect-ratio: 16 / 8;
  }

  .page-about .milestone-photo img {
    height: 100%;
    aspect-ratio: 16 / 8;
  }
}

@media (min-width: 48rem) {
  .page-about .about-hero {
    grid-template-columns: 7fr 5fr;
    gap: 3rem;
    align-items: center;
    padding-top: 1.5rem;
  }

  .page-about .hero-mark {
    max-width: 400px;
    margin: 0 0 0 auto;
  }

  .page-about .story-grid {
    grid-template-columns: 5fr 7fr;
    gap: 2.75rem;
  }

  .page-about .cred-layout {
    grid-template-columns: 1.15fr 1fr;
    align-items: start;
    gap: 2.25rem;
  }

  .page-about .about-cta {
    padding: 3rem 2.5rem;
  }
}

@media (min-width: 64rem) {
  .page-about .section-head {
    margin-bottom: 2.5rem;
  }

  .page-about .timeline {
    padding: 0.5rem 0;
  }

  .page-about .timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .timeline-item {
    width: 50%;
    padding-left: 0;
    margin-bottom: 2.25rem;
  }

  .page-about .timeline-item:nth-child(odd) {
    margin-right: auto;
    padding-right: 3.5rem;
    text-align: right;
  }

  .page-about .timeline-item:nth-child(even) {
    margin-left: auto;
    padding-left: 3.5rem;
  }

  .page-about .tl-mark {
    left: auto;
    right: -8px;
    top: 0.5rem;
  }

  .page-about .timeline-item:nth-child(even) .tl-mark {
    right: auto;
    left: -8px;
  }

  .page-about .timeline-item:nth-child(odd) .tl-body {
    border-left: none;
    border-right: 3px solid var(--color-red);
  }

  .page-about .timeline-item:nth-child(odd):hover .tl-body,
  .page-about .timeline-item:nth-child(odd):focus-within .tl-body {
    transform: translateX(-4px);
  }

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

  .page-about .data-feature-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
    margin-top: 3rem;
  }

  .page-about .data-feature-grid .feature-block:nth-child(2),
  .page-about .data-feature-grid .feature-block:nth-child(4) {
    margin-top: 1.75rem;
  }

  .page-about .data-feature-grid .feature-block:nth-child(3) {
    margin-bottom: 0.5rem;
  }

  .page-about .cred-layout {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3rem;
  }

  .page-about .cred-partner {
    margin-top: 1.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .stat-card,
  .page-about .feature-block,
  .page-about .tl-body,
  .page-about .cred-item {
    transition: none;
  }
}