.page-about {
  --about-space: clamp(64px, 8vw, 112px);
  --about-line: rgba(255, 255, 255, 0.14);
  --about-dark-deep: #071528;
  overflow-x: hidden;
  background: var(--color-light);
  color: var(--color-secondary);
}

.page-about .about-intro {
  position: relative;
  padding: calc(var(--header-offset) + 48px) 0 72px;
  background:
    radial-gradient(circle at 85% 18%, rgba(255, 107, 0, 0.32) 0%, transparent 46%),
    linear-gradient(135deg, #0A1E3D 0%, var(--about-dark-deep) 100%);
  color: #ffffff;
  overflow: hidden;
}

.page-about .about-intro::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(-45deg, rgba(255, 255, 255, 0.03) 0 12px, transparent 12px 24px);
  pointer-events: none;
}

.page-about .about-intro::after {
  content: "";
  position: absolute;
  right: -80px;
  top: 60px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: conic-gradient(from 210deg, transparent 0deg, rgba(57, 255, 20, 0.22) 72deg, transparent 128deg, rgba(255, 107, 0, 0.28) 210deg, transparent 300deg);
  pointer-events: none;
}

.page-about .about-intro .container {
  position: relative;
  z-index: 1;
}

.page-about .about-intro .breadcrumb {
  margin-bottom: 40px;
  color: rgba(255, 255, 255, 0.72);
}

.page-about .about-intro .breadcrumb a {
  color: #ffffff;
  text-decoration: none;
}

.page-about .about-intro .breadcrumb a:hover {
  color: var(--color-accent);
}

.page-about .about-intro__panel {
  max-width: 880px;
}

.page-about .about-intro__kicker {
  display: inline-block;
  padding: 6px 14px 6px 10px;
  margin-bottom: 20px;
  font: 700 14px/1.4 var(--font-body);
  letter-spacing: 0.22em;
  color: var(--color-accent);
  background: rgba(57, 255, 20, 0.08);
  border-left: 4px solid var(--color-accent);
}

.page-about .about-intro h1 {
  margin: 0 0 24px;
  font-family: var(--font-heading);
  font-size: clamp(42px, 9vw, 96px);
  line-height: 0.98;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}

.page-about .about-intro__lead {
  max-width: 56ch;
  margin: 0 0 32px;
  font-size: clamp(16px, 2.2vw, 20px);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.82);
}

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

.page-about .about-intro__tags .coord {
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.9);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-pill);
}

.page-about .about-rail {
  display: flex;
  gap: 8px;
  margin-top: 36px;
  padding: 14px 0 0;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-rail a {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  font: 600 13px/1 var(--font-body);
  color: rgba(255, 255, 255, 0.88);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-pill);
  white-space: nowrap;
  transition: background var(--transition), transform var(--transition), border-color var(--transition);
}

.page-about .about-rail a span {
  font-weight: 800;
  color: var(--color-accent);
}

.page-about .about-rail a:hover,
.page-about .about-rail a:focus-visible {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #ffffff;
  transform: translateY(-2px);
}

.page-about .about-chapter {
  padding: var(--about-space) 0;
}

.page-about .about-chapter__head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 10px;
}

.page-about .about-chapter__index {
  font-family: var(--font-heading);
  font-size: 2.4rem;
  line-height: 1;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}

.page-about .about-chapter h2 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(28px, 5vw, 48px);
  line-height: 1;
  text-transform: uppercase;
}

.page-about .about-chapter__lead {
  max-width: 62ch;
  margin: 0 0 40px;
  font-size: 17px;
  line-height: 1.75;
  color: var(--color-muted);
}

.page-about .about-story {
  background: var(--color-light);
}

.page-about .about-story__banner {
  margin-bottom: 48px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.page-about .about-timeline {
  position: relative;
  padding: 32px 0 0 36px;
  border-top: 1px solid rgba(10, 30, 61, 0.1);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 0;
  bottom: 24px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-primary), var(--color-accent));
  opacity: 0.55;
}

.page-about .about-timeline__item {
  position: relative;
  margin-bottom: 8px;
  background: rgba(255, 255, 255, 0.7);
  border-radius: var(--radius-md);
  transition: background var(--transition), box-shadow var(--transition);
}

.page-about .about-timeline__item:hover {
  background: #ffffff;
  box-shadow: 0 8px 28px rgba(10, 30, 61, 0.08);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -36px;
  top: 30px;
  width: 12px;
  height: 12px;
  background: var(--color-accent);
  border: 2px solid var(--color-secondary);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(57, 255, 20, 0.15);
}

.page-about .about-timeline__item summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 20px 20px 0;
  cursor: pointer;
  list-style: none;
}

.page-about .about-timeline__item summary::-webkit-details-marker {
  display: none;
}

.page-about .about-timeline__year {
  min-width: 3ch;
  font-family: var(--font-heading);
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1;
  color: var(--color-primary);
}

.page-about .about-timeline__title {
  flex: 1;
  font: 700 17px/1.3 var(--font-body);
  color: var(--color-secondary);
}

.page-about .about-timeline__item summary::after {
  content: "";
  flex-shrink: 0;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--color-muted);
  border-bottom: 2px solid var(--color-muted);
  transform: rotate(45deg);
  transition: transform var(--transition);
}

.page-about .about-timeline__item[open] summary::after {
  transform: rotate(-135deg);
}

.page-about .about-timeline__body {
  max-width: 62ch;
  margin-left: calc(3ch + 14px);
  padding: 0 20px 20px 0;
}

.page-about .about-timeline__body p {
  margin: 0;
  padding-left: 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-muted);
  border-left: 2px solid rgba(255, 107, 0, 0.35);
}

.page-about .about-stats {
  background:
    radial-gradient(circle at 80% 10%, rgba(255, 107, 0, 0.22) 0%, transparent 42%),
    linear-gradient(135deg, #0A1E3D 0%, var(--about-dark-deep) 100%);
  color: #ffffff;
}

.page-about .about-stats .about-chapter__lead,
.page-about .about-ecosystem .about-chapter__lead {
  color: rgba(255, 255, 255, 0.68);
}

.page-about .about-stats .about-chapter__index,
.page-about .about-ecosystem .about-chapter__index {
  color: var(--color-accent);
}

.page-about .about-stats__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.page-about .about-stat {
  position: relative;
  padding: 28px 24px 24px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-lg);
  transition: transform var(--transition), background var(--transition);
}

.page-about .about-stat::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--color-primary), var(--color-accent));
}

.page-about .about-stat:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.08);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(56px, 12vw, 96px);
  line-height: 0.9;
  color: var(--color-primary);
  letter-spacing: 0.01em;
}

.page-about .about-stat__num span {
  margin-left: 2px;
  font-size: 0.5em;
  color: var(--color-accent);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 12px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.75);
  text-transform: uppercase;
}

.page-about .about-stats__extra {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 40px;
  padding: 10px 16px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
  background: rgba(255, 107, 0, 0.12);
  border: 1px solid rgba(255, 107, 0, 0.3);
  border-radius: var(--radius-pill);
}

.page-about .about-stats__extra-dot {
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(57, 255, 20, 0.18);
}

.page-about .about-stats__chart {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-float);
}

.page-about .about-qualifications {
  background: var(--color-light);
}

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

.page-about .about-qualifications__badge {
  max-width: 420px;
  margin-inline: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.page-about .about-qualifications__list {
  display: grid;
  gap: 16px;
}

.page-about .about-qualification {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: 24px;
  background: #ffffff;
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 20px rgba(10, 30, 61, 0.06);
  transition: transform var(--transition), box-shadow var(--transition);
}

.page-about .about-qualification:hover {
  transform: translateX(6px);
  box-shadow: 0 10px 32px rgba(10, 30, 61, 0.12);
}

.page-about .about-qualification__icon {
  flex-shrink: 0;
  width: 64px;
  height: 64px;
  padding: 12px;
  background: var(--color-secondary);
  border-radius: 18px;
  box-shadow: 0 6px 16px rgba(10, 30, 61, 0.16);
}

.page-about .about-qualification__text h3 {
  margin: 0 0 6px;
  font: 800 18px/1.3 var(--font-body);
  color: var(--color-secondary);
}

.page-about .about-qualification__text p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--color-muted);
}

.page-about .about-ecosystem {
  background:
    radial-gradient(circle at 15% 85%, rgba(57, 255, 20, 0.12) 0%, transparent 36%),
    linear-gradient(135deg, #0A1E3D 0%, var(--about-dark-deep) 100%);
  color: #ffffff;
}

.page-about .about-ecosystem__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 36px;
}

.page-about .about-ecosystem__card {
  position: relative;
  padding: 36px 28px 30px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
  transition: transform var(--transition), background var(--transition);
}

.page-about .about-ecosystem__card::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 3px;
  background: var(--color-primary);
  opacity: 0.7;
}

.page-about .about-ecosystem__card--media::after {
  background: var(--color-accent);
}

.page-about .about-ecosystem__card--community::after {
  background: var(--color-warning);
}

.page-about .about-ecosystem__card:hover {
  transform: translateY(-6px);
  background: rgba(255, 255, 255, 0.1);
}

.page-about .about-ecosystem__num {
  display: block;
  margin-bottom: 18px;
  font-family: var(--font-heading);
  font-size: 44px;
  line-height: 1;
  color: rgba(255, 107, 0, 0.6);
  -webkit-text-stroke: 1.5px var(--color-primary);
}

.page-about .about-ecosystem__card h3 {
  margin: 0 0 12px;
  font-family: var(--font-heading);
  font-size: 24px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #ffffff;
}

.page-about .about-ecosystem__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.72);
}

.page-about .about-ecosystem__note {
  margin-bottom: 36px;
  padding: 22px 24px;
  background: rgba(57, 255, 20, 0.08);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.page-about .about-ecosystem__note p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
}

.page-about .about-ecosystem__links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

@media (min-width: 768px) {
  .page-about .about-intro {
    padding: calc(var(--header-offset) + 72px) 0 96px;
  }

  .page-about .about-intro__tags {
    gap: 16px;
  }

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

  .page-about .about-qualifications__layout {
    grid-template-columns: 0.85fr 1.15fr;
    gap: 56px;
  }

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

@media (min-width: 1200px) {
  .page-about .about-rail {
    position: fixed;
    left: clamp(8px, 1.5vw, 24px);
    top: 50%;
    transform: translateY(-50%);
    z-index: 40;
    flex-direction: column;
    gap: 6px;
    width: 52px;
    padding: 14px 6px;
    margin-top: 0;
    overflow: visible;
    background: rgba(7, 21, 40, 0.86);
    border: 1px solid var(--about-line);
    border-radius: 22px;
    box-shadow: var(--shadow-float);
    backdrop-filter: blur(12px);
  }

  .page-about .about-rail a {
    justify-content: center;
    padding: 12px 0;
    font-size: 14px;
    background: transparent;
    border: 0;
  }

  .page-about .about-rail a:hover,
  .page-about .about-rail a:focus-visible {
    background: rgba(255, 107, 0, 0.18);
    border-color: transparent;
    color: #ffffff;
    transform: none;
  }

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

  .page-about .about-rail a span:first-child {
    color: var(--color-accent);
  }

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