.page-about {
  --about-rail: 236px;
  --about-gap: clamp(30px, 5vw, 68px);
  background: var(--ink-900);
  color: var(--white);
  overflow-x: clip;
}

.page-about .about-crumb {
  padding-top: clamp(88px, 11vw, 124px);
}

.page-about .about-crumb .breadcrumb {
  margin: 0;
}

.page-about .about-hero {
  padding: clamp(18px, 3vw, 30px) 0 clamp(52px, 8vw, 96px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  align-items: center;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  aspect-ratio: 14 / 10;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: var(--ink-800);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 18, 31, 0.12), rgba(6, 18, 31, 0.74));
  pointer-events: none;
}

.page-about .about-hero__stamp {
  position: absolute;
  left: 18px;
  bottom: 16px;
  z-index: 1;
  padding: 6px 10px;
  border: 1px solid var(--cyan);
  color: var(--cyan);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
}

.page-about .about-hero__copy {
  min-width: 0;
}

.page-about .about-hero h1 {
  margin: 12px 0 0;
  font-family: var(--f-serif);
  font-weight: 700;
  font-size: clamp(2.08rem, 6.4vw, 4.55rem);
  line-height: 1.03;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-hero__lead {
  max-width: 56ch;
  margin: 20px 0 0;
  color: var(--mist);
  font-size: clamp(0.98rem, 1.55vw, 1.1rem);
  line-height: 1.85;
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 30px;
  margin: 28px 0 0;
  padding: 18px 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 76px;
}

.page-about .about-hero__facts .mono {
  font-family: var(--f-mono);
  font-size: clamp(1.45rem, 3vw, 2rem);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.page-about .about-hero__facts li span:last-child {
  color: var(--mist);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-doc {
  padding-block: clamp(52px, 8vw, 96px) 0;
}

.page-about .about-doc--lower {
  padding-bottom: clamp(24px, 4vw, 40px);
}

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

.page-about .about-rail__title {
  margin: 0;
  color: var(--line);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
}

.page-about .about-toc {
  display: grid;
  gap: 2px;
  margin-top: 14px;
}

.page-about .about-toc a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 10px 0 10px 14px;
  border-left: 1px solid var(--line-faint);
  color: var(--mist);
  text-decoration: none;
  font-size: 0.9rem;
  line-height: 1.4;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-toc a::before {
  content: attr(data-index);
  font-family: var(--f-mono);
  font-size: 0.68rem;
  color: var(--line);
}

.page-about .about-toc a:hover,
.page-about .about-toc a[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: linear-gradient(90deg, rgba(53, 242, 230, 0.09), transparent);
}

.page-about .about-rail__note {
  margin: 26px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-faint);
  color: rgba(168, 192, 212, 0.72);
  font-size: 0.78rem;
  line-height: 1.8;
}

.page-about .about-doc__main {
  min-width: 0;
}

.page-about .about-doc__main > .about-section + .about-section {
  margin-top: clamp(58px, 9vw, 114px);
}

.page-about .about-heading {
  max-width: 780px;
}

.page-about .about-heading h2 {
  margin: 9px 0 14px;
  font-family: var(--f-serif);
  font-weight: 700;
  font-size: clamp(1.72rem, 4.2vw, 3rem);
  line-height: 1.14;
  letter-spacing: -0.012em;
  color: var(--white);
}

.page-about .about-heading > p:last-child {
  margin: 0;
  color: var(--mist);
  font-size: 0.98rem;
  line-height: 1.85;
}

.page-about .about-timeline {
  margin: clamp(28px, 4vw, 42px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline > li {
  position: relative;
  padding: 0 0 30px 26px;
  border-left: 1px solid var(--line-soft);
}

.page-about .about-timeline > li:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline > li::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 7px;
  width: 9px;
  height: 9px;
  background: var(--ink-900);
  border: 1px solid var(--cyan);
}

.page-about .about-timeline > li:last-child::before {
  background: var(--cyan);
}

.page-about .about-timeline__year {
  display: block;
  color: var(--cyan);
  font-family: var(--f-mono);
  font-size: 1.02rem;
  letter-spacing: 0.1em;
}

.page-about .about-timeline h3 {
  margin: 5px 0 0;
  color: var(--white);
  font-size: 1.06rem;
  font-weight: 600;
  line-height: 1.5;
}

.page-about .about-timeline p {
  margin: 6px 0 0;
  color: var(--mist);
  font-size: 0.94rem;
  line-height: 1.8;
}

.page-about .about-system {
  margin-top: clamp(28px, 4vw, 40px);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-system__item {
  display: grid;
  gap: 8px;
  padding: 22px 14px 22px 0;
  border-bottom: 1px solid var(--line-faint);
  transition: background-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-system__item:hover {
  background: linear-gradient(90deg, rgba(53, 242, 230, 0.075), transparent 72%);
  box-shadow: inset 2px 0 0 var(--cyan);
}

.page-about .about-system__num {
  color: var(--cyan);
  font-family: var(--f-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
}

.page-about .about-system__body h3 {
  margin: 0;
  color: var(--white);
  font-size: 1.08rem;
  font-weight: 600;
}

.page-about .about-system__body p {
  margin: 7px 0 0;
  color: var(--mist);
  font-size: 0.93rem;
  line-height: 1.8;
}

.page-about .about-system__scene {
  margin: 0;
  color: rgba(215, 255, 63, 0.82);
  font-size: 0.78rem;
  line-height: 1.6;
  letter-spacing: 0.03em;
}

.page-about .about-team {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
  margin-top: clamp(28px, 4vw, 40px);
}

.page-about .about-team__text > p {
  margin: 0 0 14px;
  color: var(--mist);
  font-size: 0.95rem;
  line-height: 1.85;
}

.page-about .about-team__figure {
  margin: 0;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: var(--ink-800);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-team__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 22px;
  border: 1px solid var(--line-faint);
  background: var(--line-faint);
}

.page-about .about-team__stats > div {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 14px;
  background: var(--ink-800);
}

.page-about .about-team__stats .mono {
  color: var(--cyan);
  font-family: var(--f-mono);
  font-size: 1.5rem;
  line-height: 1;
}

.page-about .about-team__stats span:last-child {
  color: var(--mist);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
}

.page-about .about-partners {
  position: relative;
  margin-top: clamp(58px, 9vw, 116px);
  padding: clamp(58px, 9vw, 104px) 0;
  overflow: hidden;
  background: var(--ink-800);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-partners__bg {
  position: absolute;
  inset: 0;
  margin: 0;
  z-index: 0;
}

.page-about .about-partners__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
}

.page-about .about-partners__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 18, 31, 0.72), rgba(10, 30, 51, 0.95));
}

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

.page-about .about-partners__grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(26px, 4vw, 38px);
}

.page-about .about-partners__card {
  padding: 20px 18px;
  border: 1px solid var(--line-soft);
  background: rgba(6, 18, 31, 0.76);
}

.page-about .about-partners__tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 8px;
  border: 1px solid var(--orange);
  color: var(--orange);
  font-family: var(--f-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
}

.page-about .about-partners__card h3 {
  margin: 0;
  color: var(--white);
  font-size: 1.02rem;
  font-weight: 600;
}

.page-about .about-partners__card p {
  margin: 8px 0 0;
  color: var(--mist);
  font-size: 0.9rem;
  line-height: 1.78;
}

.page-about .about-milestones {
  display: grid;
  gap: 0;
  margin: clamp(28px, 4vw, 42px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-faint);
}

.page-about .about-milestones > li {
  position: relative;
  padding: 20px 16px 20px 20px;
  border-left: 1px solid var(--line-faint);
}

.page-about .about-milestones > li::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 26px;
  width: 9px;
  height: 9px;
  background: var(--lime);
}

.page-about .about-milestones > li:first-child {
  border-left: 0;
}

.page-about .about-milestones > li:first-child::before {
  left: 0;
}

.page-about .about-milestones .mono {
  display: block;
  color: var(--lime);
  font-family: var(--f-mono);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
}

.page-about .about-milestones h3 {
  margin: 7px 0 0;
  color: var(--white);
  font-size: 1rem;
  font-weight: 600;
}

.page-about .about-milestones p {
  margin: 7px 0 0;
  color: var(--mist);
  font-size: 0.88rem;
  line-height: 1.75;
}

.page-about .about-milestones__now .mono {
  color: var(--orange);
}

.page-about .about-milestones__now::before {
  background: var(--orange);
}

.page-about .about-why {
  display: grid;
  gap: 0;
  margin-top: clamp(28px, 4vw, 40px);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-why__item {
  display: grid;
  gap: 7px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-faint);
}

.page-about .about-why__num {
  color: var(--cyan);
  font-family: var(--f-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
}

.page-about .about-why__item h3 {
  margin: 0;
  color: var(--white);
  font-size: 1.02rem;
  font-weight: 600;
}

.page-about .about-why__item p {
  margin: 0;
  color: var(--mist);
  font-size: 0.93rem;
  line-height: 1.8;
}

.page-about .about-close {
  padding: clamp(66px, 10vw, 130px) 0 clamp(56px, 8vw, 96px);
  border-top: 1px solid var(--line-soft);
  background:
    radial-gradient(ellipse at 16% 0%, rgba(53, 242, 230, 0.14), transparent 54%),
    radial-gradient(ellipse at 92% 88%, rgba(255, 91, 46, 0.08), transparent 46%),
    var(--ink-900);
}

.page-about .about-close h2 {
  max-width: 15ch;
  margin: 12px 0 0;
  font-family: var(--f-serif);
  font-weight: 700;
  font-size: clamp(2rem, 6vw, 4.4rem);
  line-height: 1.12;
  letter-spacing: -0.018em;
  color: var(--white);
}

.page-about .about-close__lead {
  max-width: 62ch;
  margin: 22px 0 0;
  color: var(--mist);
  font-size: 0.98rem;
  line-height: 1.85;
}

.page-about .about-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .about-close__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
  justify-content: space-between;
  margin-top: 46px;
  padding-top: 22px;
  border-top: 1px solid var(--line-faint);
}

.page-about .about-close__foot > a {
  color: var(--cyan);
  font-size: 0.88rem;
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 230, 0.4);
}

.page-about .about-close__foot > a:hover {
  color: var(--white);
  border-bottom-color: var(--white);
}

.page-about .to-top {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: transparent;
  color: var(--mist);
  font-family: var(--f-sans);
  font-size: 0.82rem;
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .to-top:hover {
  color: var(--ink-900);
  border-color: var(--lime);
  background: var(--lime);
}

@media (min-width: 720px) {
  .page-about .about-hero__figure {
    aspect-ratio: 14 / 9;
  }

  .page-about .about-timeline > li {
    display: grid;
    grid-template-columns: 92px minmax(0, 1fr);
    column-gap: 18px;
  }

  .page-about .about-timeline__year {
    padding-top: 2px;
  }

  .page-about .about-system__item {
    grid-template-columns: 58px minmax(0, 1fr) 190px;
    align-items: start;
    column-gap: 18px;
    padding-right: 18px;
  }

  .page-about .about-system__num {
    padding-top: 3px;
  }

  .page-about .about-system__scene {
    padding-top: 4px;
  }

  .page-about .about-partners__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-why__item {
    grid-template-columns: 44px 210px minmax(0, 1fr);
    align-items: baseline;
    column-gap: 18px;
  }

  .page-about .about-why__num {
    padding-top: 2px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: clamp(36px, 4.6vw, 64px);
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    align-items: start;
  }

  .page-about .about-team__figure {
    position: sticky;
    top: 108px;
  }

  .page-about .about-partners__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-partners__card:nth-child(even) {
    transform: translateY(20px);
  }

  .page-about .about-milestones {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    border-top: 1px solid var(--line);
  }

  .page-about .about-milestones > li {
    padding: 24px 18px 0 0;
    border-left: 1px solid var(--line-faint);
  }

  .page-about .about-milestones > li::before {
    top: -5px;
    left: 0;
  }

  .page-about .about-milestones > li:first-child {
    border-left: 0;
  }
}

@media (min-width: 1080px) {
  .page-about .about-doc {
    display: grid;
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: 110px;
  }

  .page-about .about-doc--lower {
    display: block;
  }

  .page-about .about-doc__main--full {
    max-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc a,
  .page-about .about-system__item,
  .page-about .to-top {
    transition: none;
  }

  .page-about .about-partners__card:nth-child(even) {
    transform: none;
  }
}
<<<END>>>