.page-about {
  --about-accent-soft: rgba(100, 255, 218, 0.1);
  --about-purple-soft: rgba(157, 78, 221, 0.14);
  --about-line-bright: rgba(233, 245, 255, 0.16);
  position: relative;
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(35, 53, 84, 0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(35, 53, 84, 0.18) 1px, transparent 1px);
  background-size: 36px 36px;
  -webkit-mask-image: radial-gradient(ellipse at 20% 30%, #000 0%, transparent 75%);
  mask-image: radial-gradient(ellipse at 20% 30%, #000 0%, transparent 75%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: 0;
  top: 42%;
  width: 42%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-accent-3), transparent);
  opacity: 0.32;
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  gap: var(--space-3);
  position: relative;
}

.page-about .about-hero__intro {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.page-about .about-hero h1 {
  font-family: var(--font-title);
  font-weight: 400;
  font-size: clamp(2.5rem, 7vw, 4.25rem);
  line-height: 0.95;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--c-text);
  margin: var(--space-2) 0 var(--space-3);
}

.page-about .about-hero__lead {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--c-text-dim);
  max-width: 60ch;
  margin-bottom: var(--space-3);
}

.page-about .about-hero__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.page-about .about-hero__aside {
  display: grid;
  gap: var(--space-2);
}

.page-about .about-hero__aside .data-card {
  margin: 0;
}

.page-about .about-hero__aside .data-card__value {
  font-family: var(--font-mono);
  font-size: 2rem;
  line-height: 1.2;
  color: var(--c-accent);
}

.page-about .about-hero__aside .data-card--purple .data-card__value {
  color: var(--c-accent-3);
}

.page-about .about-section-head {
  margin-bottom: var(--space-3);
  max-width: 640px;
}

.page-about .about-section-head .coord-label {
  display: inline-block;
  margin-bottom: var(--space-1);
}

.page-about .about-milestones {
  position: relative;
  background: linear-gradient(180deg, transparent 0%, rgba(17, 34, 64, 0.35) 30%, transparent 100%);
  border-block: 1px solid var(--c-line);
}

.page-about .about-milestones__banner {
  margin: var(--space-3) 0 0;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-about .about-milestones__banner img,
.page-about .about-arch__figure img,
.page-about .about-partners__figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-about .about-timeline {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-accent) 0%, var(--c-accent-3) 40%, var(--c-accent-2) 80%, transparent 100%);
  opacity: 0.45;
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 44px;
  margin-bottom: var(--space-2);
}

.page-about .about-timeline__dot {
  position: absolute;
  left: 7px;
  top: 22px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 3px solid var(--c-bg);
  background: var(--c-accent);
  box-shadow: 0 0 10px rgba(100, 255, 218, 0.6);
}

.page-about .about-timeline__card {
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .about-timeline__card[open],
.page-about .about-timeline__card:hover {
  border-color: rgba(100, 255, 218, 0.35);
  box-shadow: 0 4px 20px rgba(2, 12, 27, 0.4);
}

.page-about .about-timeline__card summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  min-height: 52px;
  user-select: none;
}

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

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--c-accent);
  min-width: 48px;
  letter-spacing: 0.04em;
}

.page-about .about-timeline__title {
  flex: 1;
  color: var(--c-text);
  font-weight: 600;
  font-size: 1rem;
}

.page-about .about-timeline__icon {
  font-family: var(--font-mono);
  color: var(--c-text-dim);
  font-size: 1.25rem;
  line-height: 1;
  transition: transform 0.3s var(--ease), color 0.3s var(--ease);
}

.page-about .about-timeline__card[open] .about-timeline__icon {
  transform: rotate(45deg);
  color: var(--c-accent);
}

.page-about .about-timeline__body {
  padding: var(--space-2) var(--space-3) var(--space-3);
  border-top: 1px solid var(--c-line);
  color: var(--c-text-dim);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-about .about-timeline__body p {
  margin: 0;
}

.page-about .about-timeline__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: var(--space-2);
}

.page-about .about-arch {
  position: relative;
  background:
    radial-gradient(ellipse at 90% 10%, rgba(157, 78, 221, 0.14), transparent 55%),
    radial-gradient(ellipse at 10% 90%, rgba(100, 255, 218, 0.08), transparent 50%);
}

.page-about .about-arch__figure {
  margin: 0 0 var(--space-3);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-about .about-arch__grid {
  display: grid;
  gap: var(--space-2);
}

.page-about .about-arch__item {
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-accent);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .about-arch__item:nth-child(even) {
  border-left-color: var(--c-accent-2);
}

.page-about .about-arch__item:hover {
  transform: translateY(-2px);
  border-color: rgba(100, 255, 218, 0.3);
}

.page-about .about-arch__item .tag {
  display: inline-block;
  margin-bottom: var(--space-1);
}

.page-about .about-arch__item h3 {
  font-size: 1.125rem;
  color: var(--c-text);
  margin: var(--space-1) 0 0.375rem;
}

.page-about .about-arch__item p {
  font-size: 0.9375rem;
  color: var(--c-text-dim);
  line-height: 1.65;
  margin: 0;
}

.page-about .about-cert__grid {
  display: grid;
  gap: var(--space-2);
}

.page-about .about-cert__item {
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  position: relative;
  overflow: hidden;
}

.page-about .about-cert__item::after {
  content: "";
  position: absolute;
  right: -20px;
  top: -20px;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--about-purple-soft);
  z-index: 0;
  pointer-events: none;
}

.page-about .about-cert__num {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--about-accent-soft);
  border: 1px solid rgba(100, 255, 218, 0.2);
  color: var(--c-accent);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  margin-bottom: var(--space-2);
}

.page-about .about-cert__item h3 {
  position: relative;
  z-index: 1;
  font-size: 1.25rem;
  color: var(--c-text);
  margin: 0 0 0.375rem;
}

.page-about .about-cert__item p {
  position: relative;
  z-index: 1;
  color: var(--c-text-dim);
  font-size: 0.9375rem;
  line-height: 1.65;
  margin: 0;
}

.page-about .about-partners__layout {
  display: grid;
  gap: var(--space-3);
}

.page-about .about-partners__grid {
  display: grid;
  gap: var(--space-2);
}

.page-about .about-partners__item {
  border-left: 2px solid var(--c-accent-2);
  padding: var(--space-1) 0 var(--space-1) var(--space-2);
}

.page-about .about-partners__item .tag {
  display: inline-block;
  margin-bottom: 0.375rem;
}

.page-about .about-partners__item h3 {
  margin: 0 0 0.25rem;
  font-size: 1.0625rem;
  color: var(--c-text);
}

.page-about .about-partners__item p {
  color: var(--c-text-dim);
  font-size: 0.9375rem;
  line-height: 1.65;
  margin: 0;
}

.page-about .about-partners__figure {
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.page-about .about-cta__box {
  text-align: center;
  background:
    radial-gradient(ellipse at 15% 20%, rgba(100, 255, 218, 0.12), transparent 55%),
    radial-gradient(ellipse at 85% 80%, rgba(157, 78, 221, 0.16), transparent 50%),
    linear-gradient(160deg, var(--c-bg-2), var(--c-bg-3));
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-3);
  position: relative;
  overflow: hidden;
}

.page-about .about-cta__box .coord-label {
  display: inline-block;
  margin-bottom: var(--space-1);
}

.page-about .about-cta__box h2 {
  font-family: var(--font-title);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1;
  text-transform: uppercase;
  color: var(--c-text);
  margin: var(--space-1) 0 var(--space-2);
}

.page-about .about-cta__box p {
  color: var(--c-text-dim);
  margin-bottom: var(--space-3);
}

.page-about .about-cta__actions {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

@media (min-width: 640px) {
  .page-about .about-arch__grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-cert__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 820px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: end;
    gap: var(--space-4);
  }

  .page-about .about-hero__lead {
    font-size: 1.0625rem;
    margin-bottom: var(--space-4);
  }

  .page-about .about-timeline__item {
    margin-bottom: var(--space-3);
  }

  .page-about .about-timeline__body {
    font-size: 1rem;
  }
}

@media (min-width: 980px) {
  .page-about .about-partners__layout {
    grid-template-columns: 1fr 0.85fr;
    align-items: center;
    gap: var(--space-4);
  }

  .page-about .about-partners__grid {
    gap: var(--space-3);
  }

  .page-about .about-cta__box {
    padding: var(--space-5) var(--space-4);
  }
}