.page-about {
  --about-rail-w: 220px;
  background: var(--clr-white);
  color: var(--clr-dark);
  font-family: var(--font-body);
}

.page-about .breadcrumb {
  padding: 20px 0 8px;
  font-size: 14px;
  color: rgba(44, 44, 44, 0.65);
}
.page-about .breadcrumb a {
  color: var(--clr-primary);
  text-decoration: none;
  font-weight: 500;
}
.page-about .breadcrumb a:hover {
  text-decoration: underline;
}

.page-about .about-hero {
  padding: 24px 0 0;
  position: relative;
  overflow: hidden;
}
.page-about .about-hero::before {
  content: '';
  position: absolute;
  right: -80px;
  top: -80px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(244, 96, 54, 0.14) 0%, transparent 70%);
  pointer-events: none;
}
.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.page-about .about-hero__text h1 {
  font-family: var(--font-display);
  font-size: 34px;
  line-height: 1.15;
  letter-spacing: 0.5px;
  margin: 12px 0 16px;
  color: var(--clr-darker);
  transform: skewX(-1.5deg);
  transform-origin: left center;
}
.page-about .about-hero__lead {
  font-size: 16px;
  line-height: 1.75;
  color: rgba(44, 44, 44, 0.8);
  max-width: 640px;
  margin-bottom: 0;
}
.page-about .about-hero__stats {
  background: var(--clr-darker);
  border-radius: var(--radius-lg);
  padding: 20px;
  background-image:
    linear-gradient(rgba(244, 96, 54, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244, 96, 54, 0.06) 1px, transparent 1px);
  background-size: 24px 24px;
  position: relative;
  overflow: hidden;
}
.page-about .about-hero__stats-title {
  font-family: var(--font-data);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.12em;
  display: block;
  margin-bottom: 16px;
  text-transform: uppercase;
}
.page-about .about-hero__stats-grid {
  display: flex;
  gap: 12px;
  flex-wrap: nowrap;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.page-about .about-hero__stats-grid::-webkit-scrollbar {
  display: none;
}
.page-about .about-hero__stat {
  flex: 0 0 auto;
  min-width: 110px;
  padding: 8px 14px;
  border-left: 3px solid var(--clr-primary);
}
.page-about .about-hero__stat-num {
  display: block;
  font-family: var(--font-data);
  font-size: 26px;
  font-weight: 700;
  color: var(--clr-white);
  line-height: 1.2;
}
.page-about .about-hero__stat .data-label {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
}
.page-about .about-hero__visual {
  margin-top: 28px;
}
.page-about .about-hero__img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  object-fit: cover;
}

.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding-top: 32px;
  padding-bottom: 48px;
}

.page-about .chapter-rail__title {
  font-size: 12px;
  font-weight: 600;
  color: rgba(44, 44, 44, 0.55);
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 10px;
}
.page-about .chapter-rail__nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 8px;
  scrollbar-width: none;
}
.page-about .chapter-rail__nav::-webkit-scrollbar {
  display: none;
}
.page-about .chapter-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  padding: 8px 14px;
  background: var(--clr-fog);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  color: var(--clr-dark);
  text-decoration: none;
  border: 1px solid transparent;
  transition: border-color var(--ease), color var(--ease), transform var(--ease);
}
.page-about .chapter-rail__link:hover {
  border-color: var(--clr-primary);
  color: var(--clr-primary);
  transform: translateY(-2px);
}
.page-about .chapter-rail__index {
  font-family: var(--font-data);
  font-size: 11px;
  color: var(--clr-primary);
  font-weight: 700;
}
.page-about .chapter-rail__note {
  display: none;
}

.page-about .about-content {
  display: flex;
  flex-direction: column;
  gap: 36px;
  min-width: 0;
}

.page-about .about-section__body {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 20px;
}
.page-about .about-section__body p {
  font-size: 16px;
  line-height: 1.75;
  color: rgba(44, 44, 44, 0.8);
}

.page-about .milestone-section {
  padding: 16px 4px;
}
.page-about .milestone-track__axis {
  width: 100%;
  height: auto;
  max-width: 720px;
  display: block;
  margin: 24px auto 8px;
}
.page-about .milestone-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 16px;
}
.page-about .milestone-card {
  position: relative;
  background: var(--clr-white);
  border-radius: var(--radius-md);
  padding: 20px;
  border: 1px solid var(--clr-line);
  transform: skewX(-1.5deg);
  transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
}
.page-about .milestone-card:hover {
  transform: skewX(-1.5deg) translateY(-4px);
  box-shadow: var(--shadow-card);
  border-color: rgba(244, 96, 54, 0.4);
}
.page-about .milestone-card--current {
  background: linear-gradient(135deg, var(--clr-white) 60%, rgba(244, 96, 54, 0.06));
  border-color: rgba(244, 96, 54, 0.35);
}
.page-about .milestone-card__version {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 14px;
  font-weight: 700;
  color: var(--clr-primary);
  background: rgba(244, 96, 54, 0.1);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
}
.page-about .milestone-card__year {
  display: inline-block;
  margin-left: 8px;
  font-family: var(--font-data);
  font-size: 13px;
  color: rgba(44, 44, 44, 0.55);
}
.page-about .milestone-card__title {
  font-size: 18px;
  font-weight: 600;
  margin: 12px 0 8px;
  color: var(--clr-darker);
}
.page-about .milestone-card__desc {
  font-size: 14px;
  line-height: 1.65;
  color: rgba(44, 44, 44, 0.7);
}

.page-about .data-section__intro {
  margin-top: 20px;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(44, 44, 44, 0.8);
}
.page-about .data-section__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 20px;
}
.page-about .data-visual__img,
.page-about .ecosystem-flow__img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  object-fit: cover;
}
.page-about .data-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.page-about .data-metrics__item {
  background: var(--clr-fog);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-bottom: 3px solid transparent;
  transition: border-color var(--ease), transform var(--ease);
}
.page-about .data-metrics__item:hover {
  border-bottom-color: var(--clr-primary);
  transform: translateY(-2px);
}
.page-about .data-metrics__value {
  font-family: var(--font-data);
  font-size: 22px;
  font-weight: 700;
  color: var(--clr-primary);
}
.page-about .data-league-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.page-about .tech-section {
  padding: 16px 4px;
}
.page-about .tech-section__lead {
  font-size: 18px;
  font-weight: 600;
  color: var(--clr-dark);
  margin-top: 16px;
  line-height: 1.5;
}
.page-about .tech-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 24px;
}
.page-about .tech-step {
  background: var(--clr-darker);
  color: var(--clr-white);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  overflow: hidden;
  flex: 1;
}
.page-about .tech-step::after {
  content: '';
  position: absolute;
  right: -40px;
  bottom: -40px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: rgba(244, 96, 54, 0.25);
  pointer-events: none;
}
.page-about .tech-step__num {
  font-family: var(--font-data);
  font-size: 32px;
  font-weight: 700;
  color: var(--clr-primary);
  line-height: 1;
}
.page-about .tech-step__title {
  font-size: 20px;
  font-weight: 600;
  margin-top: 12px;
  color: var(--clr-white);
}
.page-about .tech-step__desc {
  font-size: 14px;
  line-height: 1.65;
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.72);
}
.page-about .tech-step__arrow {
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--clr-primary);
}
.page-about .tech-step__arrow svg {
  transform: rotate(90deg);
}
.page-about .tech-extra {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 24px;
}
.page-about .tech-extra__item {
  background: var(--clr-fog);
  border-radius: var(--radius-md);
  padding: 18px;
  transition: transform var(--ease), box-shadow var(--ease);
}
.page-about .tech-extra__item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}
.page-about .tech-extra__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: var(--clr-primary);
  color: var(--clr-white);
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 12px;
}
.page-about .tech-extra__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--clr-darker);
  margin-bottom: 6px;
}
.page-about .tech-extra__desc {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(44, 44, 44, 0.7);
}

.page-about .ecosystem-section__lead {
  margin-top: 16px;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(44, 44, 44, 0.8);
}
.page-about .ecosystem-section__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 20px;
}
.page-about .ecosystem-cards {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.page-about .ecosystem-card {
  border: 1px solid var(--clr-line);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
}
.page-about .ecosystem-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  border-color: rgba(244, 96, 54, 0.4);
}
.page-about .ecosystem-card__title {
  font-size: 18px;
  font-weight: 600;
  margin: 10px 0 8px;
  color: var(--clr-darker);
}
.page-about .ecosystem-card__desc {
  font-size: 14px;
  line-height: 1.65;
  color: rgba(44, 44, 44, 0.7);
}

.page-about .about-links__card {
  background: linear-gradient(135deg, var(--clr-darker) 0%, var(--clr-dark) 100%);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  color: var(--clr-white);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-about .about-links__card::before {
  content: '';
  position: absolute;
  left: -60px;
  top: -60px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(244, 96, 54, 0.35);
  filter: blur(30px);
  pointer-events: none;
}
.page-about .about-links__title {
  font-family: var(--font-display);
  font-size: 26px;
  line-height: 1.2;
  margin: 12px 0 8px;
  color: var(--clr-white);
}
.page-about .about-links__desc {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
  max-width: 520px;
  margin: 0 auto 20px;
  line-height: 1.65;
}
.page-about .about-links__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  position: relative;
  z-index: 1;
}
.page-about .about-links .btn--ghost {
  border-color: rgba(255, 255, 255, 0.6);
  color: var(--clr-white);
}
.page-about .about-links .btn--ghost:hover {
  background: rgba(255, 255, 255, 0.08);
}

.page-about .section-head__title {
  font-family: var(--font-display);
  font-size: 28px;
  line-height: 1.2;
  color: var(--clr-darker);
}
.page-about .about-content .section-panel {
  padding: 24px 20px;
}

@media (min-width: 768px) {
  .page-about .about-hero__text h1 {
    font-size: 42px;
  }
  .page-about .about-hero__stats-grid {
    flex-wrap: wrap;
    overflow: visible;
  }
  .page-about .about-hero__stat {
    flex: 1;
    min-width: 100px;
  }
  .page-about .milestone-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .milestone-card:nth-child(even) {
    transform: skewX(1.5deg);
  }
  .page-about .milestone-card:nth-child(even):hover {
    transform: skewX(1.5deg) translateY(-4px);
    box-shadow: var(--shadow-card);
    border-color: rgba(244, 96, 54, 0.4);
  }
  .page-about .data-section__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: center;
  }
  .page-about .ecosystem-section__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
  }
  .page-about .tech-extra {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .tech-steps {
    flex-direction: row;
    align-items: stretch;
  }
  .page-about .tech-step__arrow svg {
    transform: rotate(0deg);
  }
  .page-about .about-links__card {
    padding: 40px 32px;
  }
  .page-about .about-links__title {
    font-size: 32px;
  }
  .page-about .about-content .section-panel {
    padding: 28px 32px;
  }
}

@media (min-width: 992px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
    align-items: center;
  }
  .page-about .about-layout {
    grid-template-columns: var(--about-rail-w) 1fr;
    gap: 48px;
    align-items: start;
  }
  .page-about .chapter-rail {
    position: sticky;
    top: 96px;
    background: var(--clr-fog);
    border-radius: var(--radius-lg);
    padding: 20px 16px;
    border: 1px solid var(--clr-line);
  }
  .page-about .chapter-rail__nav {
    flex-direction: column;
    gap: 4px;
    padding-bottom: 0;
  }
  .page-about .chapter-rail__link {
    display: flex;
    align-items: center;
    gap: 10px;
    white-space: normal;
    padding: 10px 12px;
    background: transparent;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
  }
  .page-about .chapter-rail__link:hover {
    background: rgba(244, 96, 54, 0.08);
    transform: translateX(4px);
    border-color: transparent;
  }
  .page-about .chapter-rail__index {
    font-size: 12px;
  }
  .page-about .chapter-rail__label {
    font-size: 14px;
  }
  .page-about .chapter-rail__note {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 16px;
    padding: 10px 12px;
    background: var(--clr-white);
    border-radius: var(--radius-pill);
    font-size: 12px;
    color: rgba(44, 44, 44, 0.65);
    border: 1px solid var(--clr-line);
  }
  .page-about .chapter-rail__note-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--clr-success);
    box-shadow: 0 0 0 3px rgba(46, 125, 50, 0.15);
    flex: 0 0 auto;
  }
  .page-about .about-hero__text h1 {
    font-size: 48px;
  }
  .page-about .milestone-section,
  .page-about .tech-section {
    padding: 24px 8px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero__stat {
    min-width: 120px;
  }
  .page-about .about-hero__stat-num {
    font-size: 30px;
  }
  .page-about .about-links__desc {
    font-size: 16px;
  }
}