.page-about {
  --about-accent-glow: 0 0 20px rgba(245, 183, 0, 0.18);
  --about-card-border: rgba(245, 183, 0, 0.22);
  position: relative;
  background:
    radial-gradient(ellipse at 88% 12%, rgba(123, 45, 142, 0.16), transparent 42%),
    radial-gradient(ellipse at 8% 42%, rgba(229, 56, 109, 0.08), transparent 34%),
    var(--c-space);
  padding-bottom: clamp(40px, 8vw, 88px);
}

.page-about .about-brief {
  padding: clamp(36px, 7vw, 84px) 0 clamp(16px, 4vw, 40px);
  position: relative;
}

.page-about .about-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--c-silver);
  margin-bottom: 20px;
}

.page-about .about-breadcrumb a {
  color: var(--c-gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(245, 183, 0, 0.35);
}

.page-about .about-breadcrumb a:hover {
  border-bottom-color: var(--c-gold);
}

.page-about .about-breadcrumb__sep {
  color: var(--c-silver);
  opacity: 0.6;
}

.page-about .about-brief .page-title {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(2.5rem, 7vw, 5.2rem);
  line-height: 1.04;
  letter-spacing: -0.01em;
  margin: 8px 0 20px;
  color: var(--c-ice);
}

.page-about .about-brief .lead {
  max-width: 820px;
  margin: 0 0 16px;
  color: var(--c-silver);
  font-size: clamp(1rem, 2vw, 1.15rem);
  line-height: 1.75;
}

.page-about .about-brief__note {
  font-size: 0.95rem;
  color: var(--c-dust);
  border-left: 3px solid var(--c-gold);
  padding-left: 14px;
  margin: 4px 0 0;
}

.page-about .toc-board {
  margin-bottom: clamp(48px, 8vw, 96px);
  background: linear-gradient(135deg, rgba(14, 26, 58, 0.9), rgba(6, 9, 31, 0.75));
  border: 2px solid var(--about-card-border);
  box-shadow: var(--shadow-hard);
  padding: 20px;
}

.page-about .toc-board__title {
  margin: 0 0 12px;
  color: var(--c-gold);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.page-about .toc-board__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-about .toc-board__item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: rgba(6, 9, 31, 0.7);
  border: 1px solid rgba(192, 200, 220, 0.16);
  color: var(--c-ice);
  text-decoration: none;
  font-weight: 600;
  transition: border-color 0.18s ease, background 0.18s ease, transform 0.18s ease;
}

.page-about .toc-board__item:hover {
  border-color: rgba(245, 183, 0, 0.5);
  background: rgba(245, 183, 0, 0.1);
  transform: translateX(3px);
}

.page-about .toc-board__num {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--c-gold);
}

.page-about .about-section-title {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(2rem, 5vw, 3.6rem);
  line-height: 1.08;
  margin: 4px 0 12px;
  color: var(--c-ice);
}

.page-about .about-section-title + p,
.page-about .about-section-title + .about-origin__lead,
.page-about .about-section-title + .about-milestones__lead,
.page-about .about-section-title + .about-data__lead,
.page-about .about-section-title + .about-team__lead {
  color: var(--c-silver);
}

.page-about .about-origin {
  padding-bottom: clamp(48px, 8vw, 80px);
}

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-origin__content p {
  line-height: 1.8;
  color: var(--c-ice);
}

.page-about .about-origin__lead {
  font-size: 1.1rem;
  color: var(--c-silver);
  margin-bottom: 16px;
}

.page-about .about-origin__mission {
  margin: 28px 0 24px;
  padding: 20px 22px;
  background: linear-gradient(135deg, rgba(245, 183, 0, 0.12), rgba(229, 56, 109, 0.06));
  border-left: 4px solid var(--c-gold);
}

.page-about .about-origin__mission p {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.4rem, 3.5vw, 2.2rem);
  line-height: 1.2;
  color: var(--c-ice);
  margin: 0 0 6px;
}

.page-about .about-origin__mission footer {
  font-size: 0.85rem;
  color: var(--c-silver);
}

.page-about .about-milestones {
  padding: clamp(40px, 7vw, 80px) 0;
  background: linear-gradient(180deg, rgba(14, 26, 58, 0.55), rgba(6, 9, 31, 0.72));
  border-top: 2px solid rgba(245, 183, 0, 0.15);
  border-bottom: 2px solid rgba(245, 183, 0, 0.15);
  margin-bottom: clamp(48px, 8vw, 80px);
}

.page-about .about-milestones__lead {
  color: var(--c-silver);
}

.page-about .about-milestones__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 32px;
}

.page-about .about-milestones__track {
  position: relative;
  padding-left: 52px;
}

.page-about .about-milestones__line {
  position: absolute;
  left: 15px;
  top: 4px;
  bottom: 8px;
  width: 3px;
  background: linear-gradient(180deg, var(--c-gold), var(--c-nebula), var(--c-crimson));
  border-radius: 2px;
  opacity: 0.75;
}

.page-about .about-milestones__node {
  position: relative;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .about-milestones__node + .about-milestones__node {
  margin-top: clamp(24px, 4vw, 44px);
}

.page-about .about-milestones__dot {
  position: absolute;
  left: -52px;
  top: 16px;
  width: 33px;
  height: 33px;
  border-radius: 50%;
  background: var(--c-space);
  border: 3px solid var(--c-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--about-accent-glow);
}

.page-about .about-milestones__dot span {
  font-family: var(--font-display);
  font-size: 0.58rem;
  color: var(--c-gold);
  letter-spacing: 0.04em;
}

.page-about .about-milestones__card {
  min-width: 0;
  background: rgba(14, 26, 58, 0.8);
  border: 2px solid var(--about-card-border);
  box-shadow: var(--shadow-hard);
  padding: 18px 20px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.page-about .about-milestones__node:hover .about-milestones__card,
.page-about .about-milestones__node:target .about-milestones__card {
  border-color: var(--c-gold);
  box-shadow: var(--shadow-hard), var(--about-accent-glow);
  transform: translateX(3px);
}

.page-about .about-milestones__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.page-about .about-milestones__year {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.6rem;
  color: var(--c-gold);
}

.page-about .about-milestones__tag {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-ice);
  background: rgba(123, 45, 142, 0.5);
  border: 1px solid rgba(245, 183, 0, 0.25);
  padding: 3px 8px;
}

.page-about .about-milestones__title {
  font-size: 1.25rem;
  color: var(--c-ice);
  margin: 0 0 8px;
}

.page-about .about-milestones__text {
  line-height: 1.7;
  color: var(--c-silver);
  margin: 0 0 12px;
}

.page-about .about-milestones__code {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--c-dust);
  background: rgba(6, 9, 31, 0.65);
  border: 1px solid rgba(245, 183, 0, 0.22);
  padding: 4px 8px;
  font-family: var(--font-body);
}

.page-about .about-milestones__rail {
  align-self: start;
  background: rgba(6, 9, 31, 0.78);
  border: 2px solid rgba(245, 183, 0, 0.28);
  border-left: 6px solid var(--c-gold);
  box-shadow: var(--shadow-hard);
  padding: 18px;
}

.page-about .about-milestones__rail-caption {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--c-gold);
  letter-spacing: 0.08em;
}

.page-about .about-milestones__rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.page-about .about-milestones__rail-list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  color: var(--c-ice);
  text-decoration: none;
  padding: 8px 10px;
  border: 1px solid transparent;
  transition: background 0.16s ease, border-color 0.16s ease;
}

.page-about .about-milestones__rail-list a:hover {
  background: rgba(245, 183, 0, 0.1);
  border-color: rgba(245, 183, 0, 0.3);
}

.page-about .about-milestones__rail-list span {
  font-family: var(--font-display);
  color: var(--c-gold);
  font-size: 0.85rem;
}

.page-about .about-milestones__rail-note {
  font-size: 0.78rem;
  color: var(--c-silver);
  margin: 12px 0 0;
  opacity: 0.85;
}

.page-about .about-data {
  padding: clamp(40px, 7vw, 80px) 0;
  background:
    radial-gradient(ellipse at 88% 18%, rgba(123, 45, 142, 0.22), transparent 46%),
    linear-gradient(145deg, rgba(6, 9, 31, 0.9), rgba(14, 26, 58, 0.7));
  border-top: 2px solid rgba(245, 183, 0, 0.12);
  border-bottom: 2px solid rgba(245, 183, 0, 0.12);
  margin-bottom: clamp(48px, 8vw, 80px);
}

.page-about .about-data__head {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-data__lead {
  color: var(--c-silver);
  max-width: 720px;
}

.page-about .about-data__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: clamp(28px, 5vw, 48px);
}

.page-about .about-data__content h3.about-data__subtitle {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.35rem;
  color: var(--c-ice);
  margin: 24px 0 8px;
}

.page-about .about-data__content h3.about-data__subtitle:first-child {
  margin-top: 0;
}

.page-about .about-data__content p {
  line-height: 1.75;
  color: var(--c-silver);
}

.page-about .about-data__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: center;
}

.page-about .about-team {
  padding: clamp(40px, 7vw, 80px) 0 0;
}

.page-about .about-team__lead {
  color: var(--c-silver);
  max-width: 720px;
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: center;
  margin-top: 32px;
}

.page-about .about-team__subtitle {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.35rem;
  color: var(--c-ice);
  margin: 0 0 10px;
}

.page-about .about-team__content p {
  line-height: 1.75;
  color: var(--c-silver);
}

.page-about .about-team__values {
  list-style: none;
  margin: 20px 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-team__values li {
  padding: 12px 14px;
  border-left: 3px solid var(--c-gold);
  background: rgba(14, 26, 58, 0.65);
  color: var(--c-ice);
  line-height: 1.6;
}

.page-about .about-team__values strong {
  color: var(--c-gold);
}

.page-about .about-ext {
  padding-top: clamp(48px, 8vw, 80px);
}

.page-about .about-ext__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-ext__card {
  position: relative;
  padding: 22px;
  background: rgba(14, 26, 58, 0.7);
  border: 2px solid var(--about-card-border);
  box-shadow: var(--shadow-hard);
  text-decoration: none;
  transition: border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.page-about .about-ext__card:hover {
  border-color: var(--c-gold);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hard), var(--about-accent-glow);
}

.page-about .about-ext__num {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--c-gold);
}

.page-about .about-ext__title {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--c-ice);
  margin: 8px 0 6px;
}

.page-about .about-ext__desc {
  font-size: 0.9rem;
  color: var(--c-silver);
  line-height: 1.6;
  margin: 0;
}

@media (min-width: 640px) {
  .page-about .toc-board__list {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .about-data__stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .page-about .about-ext__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
}

@media (min-width: 960px) {
  .page-about .toc-board__list {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 48px;
  }

  .page-about .about-data__grid {
    grid-template-columns: minmax(0, 11fr) minmax(0, 9fr);
    gap: 48px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 11fr) minmax(0, 9fr);
    gap: 48px;
  }

  .page-about .about-milestones__body {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 40px;
    align-items: start;
  }

  .page-about .about-milestones__rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-about .about-data__stats {
    gap: 20px;
  }
}