.page-about {
  --about-rail-width: 264px;
  --about-brick-alpha: 0.14;
  --about-timeline-line: #1A4A3A;
  --about-gold-soft: rgba(217, 162, 27, 0.18);
  --about-ember-soft: rgba(232, 82, 46, 0.12);
  --about-electric-soft: rgba(14, 95, 216, 0.10);
  background-color: var(--color-cream);
  background-image:
    repeating-linear-gradient(
      0deg,
      rgba(142, 59, 47, 0.06) 0px,
      rgba(142, 59, 47, 0.06) 1px,
      transparent 1px,
      transparent 24px
    ),
    repeating-linear-gradient(
      90deg,
      rgba(142, 59, 47, 0.04) 0px,
      rgba(142, 59, 47, 0.04) 1px,
      transparent 1px,
      transparent 36px
    );
  min-height: 100vh;
}

.page-about .about-shell {
  display: block;
  max-width: 1440px;
  margin: 0 auto;
}

.page-about .about-rail {
  display: none;
}

.page-about .about-content {
  padding: 0 20px;
  max-width: 100%;
}

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 13px;
  color: rgba(28, 27, 26, 0.62);
  padding: 28px 0 12px;
}

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

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

.page-about .breadcrumb-separator {
  color: var(--color-line);
}

.page-about .about-cover {
  padding: 36px 0 48px;
  position: relative;
}

.page-about .about-cover::after {
  content: "";
  position: absolute;
  right: -20px;
  bottom: 0;
  width: 72%;
  height: 6px;
  background: linear-gradient(135deg, var(--color-brick), var(--color-ember), var(--color-gold));
  border-radius: 999px 0 0 999px;
}

.page-about .about-cover-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.page-about .about-cover-title {
  margin: 20px 0 16px;
  font-family: var(--font-headline);
  font-weight: 800;
  font-size: clamp(28px, 5.4vw, 42px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--color-ink);
}

.page-about .about-cover-lead {
  max-width: 640px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(28, 27, 26, 0.78);
  margin-bottom: 28px;
}

.page-about .about-cover-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  max-width: 560px;
}

.page-about .about-cover-item {
  background: var(--color-paper);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  border-left: 3px solid var(--color-pitch);
  box-shadow: var(--shadow-sm);
}

.page-about .about-cover-label {
  display: block;
  font-size: 12px;
  color: rgba(28, 27, 26, 0.58);
  margin-bottom: 4px;
  letter-spacing: 0.04em;
}

.page-about .about-cover-value {
  display: block;
  font-size: 17px;
  font-weight: 700;
  color: var(--color-ink);
  font-family: var(--font-headline);
}

.page-about .about-section {
  padding: 56px 0 24px;
  position: relative;
}

.page-about .section-head {
  margin-bottom: 28px;
}

.page-about .section-title {
  font-family: var(--font-headline);
  font-size: 26px;
  font-weight: 800;
  line-height: 1.25;
  color: var(--color-ink);
  position: relative;
  padding-left: 16px;
  margin-bottom: 8px;
}

.page-about .section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--color-ember), var(--color-brick));
}

.page-about .section-subtitle {
  font-size: 14px;
  color: rgba(28, 27, 26, 0.62);
  padding-left: 16px;
  line-height: 1.6;
}

.page-about .about-origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .about-origin-p {
  font-size: 15px;
  line-height: 1.85;
  color: rgba(28, 27, 26, 0.82);
  margin-bottom: 16px;
}

.page-about .about-origin-quote {
  margin: 20px 0;
  padding: 16px 20px 16px 36px;
  background: var(--color-paper);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-gold);
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  position: relative;
  box-shadow: var(--shadow-sm);
}

.page-about .about-origin-quote-mark {
  position: absolute;
  left: 10px;
  top: 2px;
  font-size: 40px;
  line-height: 1;
  color: var(--color-gold);
  font-family: Georgia, serif;
}

.page-about .about-origin-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  background: var(--color-paper);
  box-shadow: var(--shadow-md);
  transform: rotate(-1deg);
}

.page-about .about-origin-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 16 / 10;
}

.page-about .about-origin-caption {
  font-size: 12px;
  color: rgba(28, 27, 26, 0.56);
  padding: 10px 14px;
  background: var(--color-paper);
}

.page-about .about-brick-stripe {
  margin-top: 24px;
  height: 10px;
  border-radius: 999px;
  background: repeating-linear-gradient(
    135deg,
    var(--color-brick) 0px,
    var(--color-brick) 10px,
    transparent 10px,
    transparent 20px,
    var(--color-ember) 20px,
    var(--color-ember) 30px,
    transparent 30px,
    transparent 40px
  );
  opacity: 0.6;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 8px 0 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 12px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(
    180deg,
    var(--color-pitch) 0%,
    var(--color-pitch) 30%,
    var(--color-ember) 55%,
    var(--color-gold) 78%,
    var(--color-brick) 100%
  );
  border-radius: 999px;
}

.page-about .about-timeline-item {
  position: relative;
  padding-left: 44px;
  margin-bottom: 24px;
}

.page-about .about-timeline-node {
  position: absolute;
  left: 0;
  top: 18px;
  width: 24px;
  height: 24px;
}

.page-about .about-timeline-dot {
  display: block;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-cream);
  border: 3px solid var(--color-pitch);
  box-shadow: 0 0 0 4px rgba(26, 74, 58, 0.14);
  transition: transform 0.25s ease, background-color 0.25s ease;
}

.page-about .about-timeline-item:hover .about-timeline-dot {
  transform: scale(1.18);
  background-color: var(--color-ember);
  border-color: var(--color-ember);
}

.page-about .about-timeline-phase {
  position: absolute;
  left: 32px;
  top: 0;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--color-brick);
  white-space: nowrap;
  font-family: var(--font-data);
}

.page-about .about-timeline-card {
  margin-top: 20px;
  padding: 18px 18px 16px;
  border-radius: var(--radius-md);
  background: var(--color-paper);
  border-left: 3px solid var(--color-pitch);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-timeline-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.page-about .about-timeline-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 6px;
  font-family: var(--font-headline);
}

.page-about .about-timeline-text {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(28, 27, 26, 0.74);
  margin: 0;
}

.page-about .about-data-head {
  position: relative;
  padding: 28px 20px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(26, 74, 58, 0.12), rgba(14, 95, 216, 0.06)), var(--color-paper);
  overflow: hidden;
  margin-bottom: 20px;
}

.page-about .about-data-bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.22;
  pointer-events: none;
  border-radius: var(--radius-lg);
}

.page-about .about-data-head .section-head {
  position: relative;
  z-index: 1;
  margin-bottom: 0;
}

.page-about .about-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 24px;
}

.page-about .about-stat-card {
  padding: 18px 14px;
  border-radius: var(--radius-md);
  background: var(--color-paper);
  box-shadow: var(--shadow-sm);
  border-top: 3px solid var(--color-pitch);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.page-about .about-stat-num {
  display: block;
  font-family: var(--font-data);
  font-size: 30px;
  font-weight: 700;
  color: var(--color-pitch);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.page-about .about-stat-num small {
  font-size: 18px;
  color: var(--color-ember);
  margin-left: 2px;
}

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

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

.page-about .about-stat-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-ink);
  margin: 8px 0 4px;
}

.page-about .about-stat-desc {
  font-size: 12px;
  line-height: 1.6;
  color: rgba(28, 27, 26, 0.58);
  margin: 0;
}

.page-about .about-data-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  background: var(--color-paper);
  border-radius: var(--radius-lg);
  padding: 8px 16px;
  box-shadow: var(--shadow-sm);
}

.page-about .about-data-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-line);
}

.page-about .about-data-item:last-child {
  border-bottom: none;
}

.page-about .about-data-index {
  font-family: var(--font-data);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-brick);
  line-height: 1;
  flex-shrink: 0;
  min-width: 36px;
}

.page-about .about-data-body {
  flex: 1;
}

.page-about .about-data-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 4px;
}

.page-about .about-data-text {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(28, 27, 26, 0.7);
  margin: 0;
}

.page-about .about-record-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .about-record-p {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(28, 27, 26, 0.8);
  margin-bottom: 14px;
}

.page-about .about-record-points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 20px 0;
}

.page-about .about-record-point {
  background: var(--color-paper);
  border-radius: var(--radius-sm);
  padding: 12px 10px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.page-about .about-record-point-num {
  display: block;
  font-family: var(--font-data);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ember);
}

.page-about .about-record-point-desc {
  display: block;
  font-size: 11px;
  color: rgba(28, 27, 26, 0.56);
  margin-top: 4px;
}

.page-about .about-record-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 20px;
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.25s ease;
  cursor: pointer;
  border: none;
}

.page-about .btn-primary {
  background: var(--color-pitch);
  color: #fff;
}

.page-about .btn-primary:hover {
  background: #1f5c48;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.page-about .btn-outline {
  background: transparent;
  border: 1.5px solid rgba(28, 27, 26, 0.4);
  color: var(--color-ink);
}

.page-about .btn-outline:hover {
  border-color: var(--color-ink);
  background: rgba(28, 27, 26, 0.04);
}

.page-about .btn-sm {
  padding: 8px 18px;
  font-size: 13px;
}

.page-about .about-record-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-paper);
  box-shadow: var(--shadow-md);
  transform: rotate(1deg);
}

.page-about .about-record-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 1 / 1;
}

.page-about .about-record-caption {
  font-size: 12px;
  color: rgba(28, 27, 26, 0.56);
  padding: 10px 14px;
  background: var(--color-paper);
}

.page-about .about-cta {
  margin: 48px 0 56px;
  padding: 24px 20px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-night) 0%, #1a2e26 100%);
  position: relative;
  overflow: hidden;
  text-align: center;
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-brick), var(--color-ember), var(--color-gold));
}

.page-about .about-cta-inner {
  position: relative;
  z-index: 1;
}

.page-about .about-cta-title {
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 10px;
  font-family: var(--font-headline);
}

.page-about .about-cta-text {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.72);
  max-width: 480px;
  margin: 0 auto 20px;
}

.page-about .about-cta-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.page-about .about-cta .btn-primary {
  background: var(--color-ember);
}

.page-about .about-cta .btn-primary:hover {
  background: #f06442;
}

.page-about .about-cta .btn-outline {
  border-color: rgba(255, 255, 255, 0.5);
  color: #fff;
}

.page-about .about-cta .btn-outline:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

@media (min-width: 768px) {
  .page-about .about-content {
    max-width: 1200px;
    margin: 0 auto;
  }

  .page-about .about-cover {
    padding: 56px 0 64px;
  }

  .page-about .about-cover-title {
    font-size: clamp(32px, 5vw, 48px);
  }

  .page-about .about-cover-lead {
    font-size: 16px;
    max-width: 640px;
  }

  .page-about .about-cover-meta {
    grid-template-columns: repeat(4, 1fr);
    max-width: none;
  }

  .page-about .about-cover-item {
    padding: 16px 18px;
  }

  .page-about .about-section {
    padding: 68px 0 32px;
  }

  .page-about .section-title {
    font-size: 30px;
  }

  .page-about .section-subtitle {
    font-size: 15px;
  }

  .page-about .about-origin-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 40px;
    align-items: start;
  }

  .page-about .about-origin-text {
    padding-right: 8px;
  }

  .page-about .about-origin-p {
    font-size: 15px;
  }

  .page-about .about-origin-figure {
    margin-top: 12px;
  }

  .page-about .about-timeline-item {
    padding-left: 48px;
  }

  .page-about .about-timeline-card {
    padding: 20px 22px;
  }

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

  .page-about .about-stat-card {
    padding: 22px 18px;
  }

  .page-about .about-stat-num {
    font-size: 36px;
  }

  .page-about .about-data-list {
    grid-template-columns: 1fr 1fr;
    gap: 0;
    padding: 16px 24px;
  }

  .page-about .about-data-item {
    padding: 18px 16px;
    border-bottom: 1px solid var(--color-line);
  }

  .page-about .about-data-item:nth-child(even) {
    border-left: 1px solid var(--color-line);
    padding-left: 24px;
  }

  .page-about .about-data-item:nth-child(odd) {
    padding-right: 24px;
  }

  .page-about .about-data-item:last-child {
    border-bottom: 1px solid var(--color-line);
  }

  .page-about .about-record-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
  }

  .page-about .about-record-links {
    flex-direction: row;
  }

  .page-about .about-cta {
    padding: 40px 32px;
  }

  .page-about .about-cta-title {
    font-size: 30px;
  }

  .page-about .about-cta-actions {
    flex-direction: row;
    justify-content: center;
  }
}

@media (min-width: 1200px) {
  .page-about .about-shell {
    display: grid;
    grid-template-columns: var(--about-rail-width) 1fr;
    min-height: 100vh;
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: 0;
    height: 100vh;
    background: var(--color-night);
    color: rgba(255, 255, 255, 0.82);
    overflow-y: auto;
    border-radius: 0 24px 24px 0;
  }

  .page-about .about-rail::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(90deg, var(--color-brick), var(--color-ember), var(--color-gold));
    opacity: 0.85;
  }

  .page-about .about-rail-inner {
    padding: 40px 24px 32px;
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - 6px);
  }

  .page-about .about-rail-kicker {
    font-family: var(--font-data);
    font-size: 12px;
    letter-spacing: 0.16em;
    color: var(--color-gold);
    margin: 0 0 12px;
  }

  .page-about .about-rail-title {
    font-size: 20px;
    line-height: 1.5;
    color: #fff;
    font-weight: 700;
    font-family: var(--font-headline);
    margin: 0 0 28px;
  }

  .page-about .about-rail-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }

  .page-about .about-rail-link {
    display: block;
    padding: 10px 8px 10px 16px;
    font-size: 14px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.64);
    text-decoration: none;
    border-left: 3px solid transparent;
    transition: all 0.25s ease;
    border-radius: 0 999px 999px 0;
  }

  .page-about .about-rail-link:hover {
    color: #fff;
    border-left-color: var(--color-ember);
    background: rgba(232, 82, 46, 0.1);
  }

  .page-about .about-rail-link.is-active {
    color: #fff;
    border-left-color: var(--color-ember);
    background: rgba(232, 82, 46, 0.16);
    font-weight: 600;
  }

  .page-about .about-rail-foot {
    margin-top: auto;
    padding-top: 32px;
  }

  .page-about .about-rail-line {
    display: block;
    width: 36px;
    height: 4px;
    background: var(--color-gold);
    border-radius: 999px;
    margin-bottom: 16px;
  }

  .page-about .about-rail-note {
    font-size: 13px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.5);
    margin: 0;
  }

  .page-about .about-rail-num {
    font-family: var(--font-data);
    font-weight: 700;
    color: var(--color-gold);
    font-size: 18px;
  }

  .page-about .about-content {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 40px;
  }

  .page-about .about-cover {
    padding: 72px 0 56px;
  }

  .page-about .about-cover-title {
    font-size: 46px;
  }

  .page-about .about-cover-lead {
    font-size: 17px;
  }

  .page-about .about-cover::after {
    right: 0;
    width: 54%;
  }

  .page-about .about-section {
    padding: 80px 0 32px;
  }

  .page-about .section-title {
    font-size: 34px;
  }

  .page-about .section-subtitle {
    font-size: 16px;
  }

  .page-about .about-origin-p {
    font-size: 16px;
  }

  .page-about .about-origin-quote {
    font-size: 17px;
  }

  .page-about .about-timeline::before {
    left: 15px;
  }

  .page-about .about-timeline-node {
    width: 32px;
    height: 32px;
  }

  .page-about .about-timeline-dot {
    width: 30px;
    height: 30px;
  }

  .page-about .about-timeline-item {
    padding-left: 72px;
  }

  .page-about .about-timeline-phase {
    left: 42px;
    font-size: 12px;
  }

  .page-about .about-timeline-card {
    padding: 24px 28px;
  }

  .page-about .about-timeline-title {
    font-size: 19px;
  }

  .page-about .about-timeline-text {
    font-size: 15px;
  }

  .page-about .about-stats-grid {
    gap: 20px;
  }

  .page-about .about-stat-card {
    padding: 28px 24px;
  }

  .page-about .about-stat-num {
    font-size: 44px;
  }

  .page-about .about-stat-label {
    font-size: 14px;
  }

  .page-about .about-data-list {
    padding: 20px 28px;
  }

  .page-about .about-record-p {
    font-size: 16px;
  }

  .page-about .about-record-points {
    gap: 14px;
    margin: 24px 0;
  }

  .page-about .about-record-point {
    padding: 16px 12px;
  }

  .page-about .about-record-point-num {
    font-size: 18px;
  }

  .page-about .about-record-point-desc {
    font-size: 12px;
  }

  .page-about .about-cta {
    margin: 64px 0 80px;
    padding: 52px 40px;
  }

  .page-about .about-cta-text {
    font-size: 15px;
  }
}

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