.page-about {
  --about-card-bg: rgba(18, 41, 74, 0.5);
}

.page-about > .page-shell > section {
  margin-bottom: 72px;
}

.page-about .breadcrumb {
  margin-bottom: 24px;
}

.page-about .about-hero {
  margin-bottom: 80px;
}

.page-about .about-mission-card {
  display: grid;
  gap: 0;
  overflow: hidden;
  border: 1px solid var(--color-line);
  background:
    linear-gradient(135deg, rgba(255, 107, 53, 0.08) 0%, transparent 45%),
    var(--color-secondary);
  position: relative;
}

.page-about .mission-copy {
  padding: 32px 24px;
}

.page-about .mission-copy h1 {
  font-size: 1.6rem;
  line-height: 1.35;
  font-weight: 900;
  margin: 16px 0 20px;
  letter-spacing: -0.01em;
  color: var(--color-light);
}

.page-about .mission-lead {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--color-light);
  margin-bottom: 16px;
  font-weight: 500;
}

.page-about .mission-copy > p:not(.mission-lead) {
  color: rgba(242, 244, 248, 0.78);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 28px;
}

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

.page-about .mission-stats {
  padding: 28px 24px;
  background: rgba(11, 29, 58, 0.6);
  border-top: 1px solid rgba(192, 200, 208, 0.25);
}

.page-about .stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px 16px;
}

.page-about .stat-block {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
}

.page-about .stat-label {
  font-size: 0.82rem;
  color: rgba(242, 244, 248, 0.7);
  line-height: 1.4;
}

.page-about .mission-note {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid rgba(192, 200, 208, 0.2);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: rgba(242, 244, 248, 0.65);
}

.page-about .section-heading {
  margin-bottom: 32px;
}

.page-about .section-heading h2 {
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1.3;
  margin: 12px 0 8px;
  color: var(--color-light);
}

.page-about .section-desc {
  font-size: 0.95rem;
  line-height: 1.7;
  color: rgba(242, 244, 248, 0.72);
  max-width: 640px;
}

.page-about .about-timeline {
  position: relative;
  padding-top: 24px;
}

.page-about .tl-opening-image {
  margin-bottom: 40px;
}

.page-about .image-frame img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
  background: rgba(11, 29, 58, 0.6);
}

.page-about .timeline {
  position: relative;
  padding-left: 36px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-image: linear-gradient(
    to bottom,
    var(--color-accent),
    rgba(255, 107, 53, 0.1) 65%,
    transparent
  );
  border-radius: 2px;
}

.page-about .timeline-item {
  position: relative;
  padding-bottom: 36px;
}

.page-about .timeline-item:last-child {
  padding-bottom: 0;
}

.page-about .tl-dot {
  position: absolute;
  left: -28px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.18);
  transition: transform var(--transition);
}

.page-about .timeline-item:hover .tl-dot {
  transform: scale(1.2);
}

.page-about .tl-card {
  background: var(--about-card-bg);
  border: 1px solid rgba(192, 200, 208, 0.25);
  border-radius: var(--radius);
  padding: 20px 20px 22px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.page-about .timeline-item:hover .tl-card {
  border-color: rgba(255, 107, 53, 0.5);
  box-shadow: var(--shadow-md);
}

.page-about .tl-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-accent);
}

.page-about .tl-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.4;
  color: var(--color-light);
}

.page-about .tl-card p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(242, 244, 248, 0.75);
  margin: 0;
}

.page-about .tl-detail {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 0.85rem;
  line-height: 1.6;
  color: rgba(242, 244, 248, 0.65);
  border-top: 1px solid transparent;
  margin-top: 0;
  padding-top: 0;
  transition:
    max-height 0.35s ease,
    opacity 0.35s ease,
    margin-top 0.35s ease,
    padding-top 0.35s ease,
    border-color 0.35s ease;
}

.page-about .timeline-item:hover .tl-detail,
.page-about .timeline-item:focus-within .tl-detail {
  max-height: 80px;
  opacity: 1;
  margin-top: 10px;
  padding-top: 10px;
  border-top-color: rgba(192, 200, 208, 0.2);
}

.page-about .about-data {
  padding-top: 24px;
}

.page-about .data-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 32px;
}

.page-about .data-card {
  background: linear-gradient(145deg, rgba(18, 41, 74, 0.75), rgba(11, 29, 58, 0.55));
  border: 1px solid rgba(192, 200, 208, 0.22);
  border-radius: var(--radius);
  padding: 20px 16px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.page-about .data-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1.3;
  margin-bottom: 4px;
}

.page-about .data-label {
  display: block;
  font-size: 0.82rem;
  color: rgba(242, 244, 248, 0.72);
  line-height: 1.4;
}

.page-about .data-visual {
  display: grid;
  gap: 16px;
  margin-bottom: 24px;
}

.page-about .trend-chart {
  background: rgba(11, 29, 58, 0.6);
  border: 1px solid rgba(192, 200, 208, 0.22);
  border-radius: var(--radius);
  padding: 12px;
}

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

.page-about .trend-chart text {
  font-family: var(--font-mono);
}

.page-about .data-img {
  width: 100%;
}

.page-about .data-footnote {
  font-size: 0.88rem;
  line-height: 1.7;
  color: rgba(242, 244, 248, 0.65);
  border-left: 3px solid var(--color-accent);
  padding-left: 16px;
  margin: 0;
}

.page-about .about-team {
  padding-top: 24px;
}

.page-about .team-grid {
  display: grid;
  gap: 16px;
  margin-bottom: 20px;
}

.page-about .team-card {
  background: var(--about-card-bg);
  border: 1px solid rgba(192, 200, 208, 0.22);
  border-radius: var(--radius);
  padding: 24px 20px;
  position: relative;
  transition: border-color var(--transition), transform var(--transition);
}

.page-about .team-card:hover {
  border-color: rgba(255, 107, 53, 0.45);
  transform: translateY(-3px);
}

.page-about .team-icon {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--color-accent-2);
  opacity: 0.8;
  margin-bottom: 12px;
}

.page-about .team-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-light);
}

.page-about .team-card p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(242, 244, 248, 0.72);
  margin: 0;
}

.page-about .team-note {
  font-size: 0.85rem;
  color: rgba(242, 244, 248, 0.6);
  line-height: 1.7;
  border-top: 1px solid rgba(192, 200, 208, 0.2);
  padding-top: 14px;
  margin-bottom: 20px;
}

.page-about .about-local {
  display: grid;
  gap: 28px;
  padding-top: 24px;
}

.page-about .local-copy h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin: 12px 0 16px;
  color: var(--color-light);
}

.page-about .local-copy > p {
  font-size: 0.95rem;
  line-height: 1.7;
  color: rgba(242, 244, 248, 0.75);
  margin-bottom: 20px;
}

.page-about .local-points {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
}

.page-about .local-points li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 12px;
  font-size: 0.92rem;
  line-height: 1.65;
  color: rgba(242, 244, 248, 0.78);
}

.page-about .local-points li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
}

.page-about .local-img {
  width: 100%;
}

.page-about .about-cta {
  margin-top: 24px;
  border-top: 1px solid rgba(192, 200, 208, 0.2);
  padding: 32px 0 8px;
  text-align: center;
}

.page-about .about-cta h2 {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-light);
}

.page-about .about-cta p {
  color: rgba(242, 244, 248, 0.7);
  margin: 8px 0 20px;
}

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

@media (min-width: 768px) {
  .page-about .about-mission-card {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .page-about .mission-copy {
    padding: 48px 40px;
  }

  .page-about .mission-stats {
    padding: 48px 32px;
    border-top: none;
    border-left: 1px solid rgba(192, 200, 208, 0.25);
  }

  .page-about .mission-copy h1 {
    font-size: 2rem;
  }

  .page-about .stat-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px 20px;
  }

  .page-about .stat-num {
    font-size: 1.6rem;
  }

  .page-about .timeline {
    padding-left: 0;
  }

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

  .page-about .timeline-item {
    width: 50%;
    padding-right: 48px;
    padding-left: 0;
  }

  .page-about .timeline-item:nth-child(even) {
    margin-left: 50%;
    padding-right: 0;
    padding-left: 48px;
  }

  .page-about .tl-dot {
    left: auto;
    right: -7px;
  }

  .page-about .timeline-item:nth-child(even) .tl-dot {
    right: auto;
    left: -7px;
  }

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

  .page-about .data-num {
    font-size: 1.7rem;
  }

  .page-about .data-visual {
    grid-template-columns: 1fr 0.85fr;
    align-items: center;
  }

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

  .page-about .about-local {
    grid-template-columns: 1fr 0.8fr;
    align-items: center;
  }

  .page-about .local-copy {
    order: 1;
  }

  .page-about .local-img {
    order: 2;
  }
}

@media (min-width: 1024px) {
  .page-about .about-mission-card {
    grid-template-columns: 1.15fr 0.85fr;
  }

  .page-about .mission-copy h1 {
    font-size: 2.1rem;
  }

  .page-about .section-heading h2 {
    font-size: 1.7rem;
  }

  .page-about .about-cta h2 {
    font-size: 1.6rem;
  }
}