.page-about {
  --about-line-gradient: linear-gradient(100deg, rgba(255, 215, 0, 0.5), rgba(108, 43, 244, 0.18));
  --about-card-bg: linear-gradient(145deg, rgba(108, 43, 244, 0.16), rgba(11, 11, 26, 0.62));
  --about-violet-border: rgba(155, 107, 255, 0.32);
  --about-gold-glow: 0 0 22px rgba(255, 215, 0, 0.26);
  background:
    radial-gradient(circle at 88% 0%, rgba(108, 43, 244, 0.16), transparent 34%),
    linear-gradient(180deg, var(--color-space), var(--color-space-deep) 94%);
  color: var(--color-white);
  overflow-x: hidden;
  padding: 48px 0 88px;
}

.page-about .story-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 18px 0 46px;
}

.page-about .story-hero__decor {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.page-about .story-hero__glow {
  position: absolute;
  right: -120px;
  top: -140px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(108, 43, 244, 0.32), transparent 68%);
  filter: blur(10px);
}

.page-about .story-hero__waves {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 120px;
  opacity: 0.72;
  transform: translateY(18px);
}

.page-about .story-hero__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 34px;
}

.page-about .story-hero__main {
  min-width: 0;
}

.page-about .story-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 30px;
  font-size: 0.82rem;
  color: var(--color-silver);
}

.page-about .story-breadcrumb a {
  color: var(--color-silver);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.25s ease, border-color 0.25s ease;
}

.page-about .story-breadcrumb a:hover,
.page-about .story-breadcrumb a:focus-visible {
  color: var(--color-white);
  border-color: var(--color-green);
}

.page-about .story-hero__eyebrow {
  display: block;
  margin-bottom: 14px;
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-silver);
}

.page-about .story-hero h1 {
  margin: 14px 0 18px;
  max-width: 11ch;
  font-size: clamp(2.6rem, 11vw, 4.9rem);
  line-height: 1.06;
  letter-spacing: -0.04em;
  color: var(--color-white);
  font-weight: 800;
}

.page-about .story-hero__lead {
  max-width: 60ch;
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.72;
  color: var(--color-white);
}

.page-about .story-hero__sub {
  max-width: 52ch;
  margin: 16px 0 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-silver);
}

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

.page-about .story-quick-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  padding: 20px;
  border: 1px solid var(--about-violet-border);
  border-radius: 20px;
  background: rgba(11, 11, 26, 0.55);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.24);
}

.page-about .story-stat {
  min-width: 0;
}

.page-about .story-stat__num {
  display: block;
  font-size: 1.78rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-gold);
  text-shadow: var(--about-gold-glow);
}

.page-about .story-stat__label {
  display: block;
  margin-top: 4px;
  font-size: 0.8rem;
  color: var(--color-silver);
}

.page-about .story-hero__aside .note-aside {
  margin-top: 14px;
}

.page-about .story-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding-top: 16px;
}

.page-about .story-shell__side {
  min-width: 0;
}

.page-about .story-chapters {
  display: flex;
  flex-wrap: nowrap;
  gap: 10px;
  overflow-x: auto;
  padding: 6px 2px 14px;
  scrollbar-width: thin;
  scrollbar-color: var(--color-violet-soft) transparent;
}

.page-about .story-chapters__link {
  position: relative;
  flex: 0 0 auto;
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  min-width: 128px;
  padding: 12px 16px;
  border: 1px solid var(--about-violet-border);
  border-radius: 16px;
  background: rgba(11, 11, 26, 0.4);
  text-decoration: none;
  transition: background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

.page-about .story-chapters__main {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-white);
}

.page-about .story-chapters__link .mono {
  color: var(--color-violet-soft);
  font-size: 0.82rem;
}

.page-about .story-chapters__tip {
  display: none;
}

.page-about .story-chapters__link:hover,
.page-about .story-chapters__link:focus-visible {
  background: rgba(108, 43, 244, 0.22);
  border-color: var(--color-violet-soft);
}

.page-about .story-shell__note {
  display: none;
}

.page-about .story-shell__content {
  min-width: 0;
  display: grid;
  gap: 28px;
}

.page-about .story-section {
  scroll-margin-top: 92px;
  padding: 40px 0 10px;
  border-top: 1px solid rgba(160, 174, 192, 0.16);
}

.page-about .story-section:first-child {
  border-top: none;
}

.page-about .story-section__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .story-section__body {
  min-width: 0;
  display: grid;
  gap: 0;
}

.page-about .story-section__head {
  margin-bottom: 20px;
}

.page-about .story-section__head h2,
.page-about .story-epilogue h2 {
  margin: 12px 0 0;
  font-size: clamp(1.6rem, 5vw, 2.35rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-white);
  font-weight: 800;
}

.page-about .story-section__head p {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.75;
  color: rgba(245, 247, 250, 0.86);
}

.page-about .story-section__body p {
  margin: 0 0 14px;
  max-width: 66ch;
  font-size: 1rem;
  line-height: 1.78;
  color: rgba(245, 247, 250, 0.88);
}

.page-about .story-section__aside {
  display: grid;
  gap: 14px;
  align-content: start;
  border-top: 1px solid rgba(160, 174, 192, 0.22);
  padding-top: 16px;
}

.page-about .story-figure {
  margin: 10px 0 0;
}

.page-about .story-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 18px;
  border: 1px solid rgba(255, 215, 0, 0.22);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.32);
  background: var(--color-space-deep);
}

.page-about .story-figure__cap {
  margin: 10px 0 0;
  font-size: 0.84rem;
  line-height: 1.5;
  color: var(--color-silver);
}

.page-about .milestone-list {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
  position: relative;
}

.page-about .milestone-list::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-gold), var(--color-violet-soft), transparent);
  opacity: 0.5;
}

.page-about .milestone-item {
  position: relative;
  padding-left: 34px;
}

.page-about .milestone-item__node {
  position: absolute;
  left: 3px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-gold);
  box-shadow: 0 0 0 4px rgba(255, 215, 0, 0.14), var(--about-gold-glow);
}

.page-about .milestone-card {
  padding: 20px 18px;
  border: 1px solid var(--about-violet-border);
  border-radius: 18px;
  background: var(--about-card-bg);
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

.page-about .milestone-card:hover,
.page-about .milestone-card:focus-within {
  transform: translateY(-3px);
  border-color: var(--color-violet-soft);
  background: linear-gradient(145deg, rgba(108, 43, 244, 0.22), rgba(11, 11, 26, 0.7));
}

.page-about .milestone-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.page-about .milestone-card__tag {
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--color-silver);
}

.page-about .milestone-card h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-white);
}

.page-about .milestone-card p {
  margin: 0;
  max-width: 58ch;
  font-size: 0.94rem;
  line-height: 1.7;
  color: rgba(245, 247, 250, 0.82);
}

.page-about .story-figure--milestone {
  margin-top: 26px;
}

.page-about .story-section__head--edge {
  max-width: 68ch;
}

.page-about .system-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 24px;
}

.page-about .system-card {
  padding: 22px 18px;
  border: 1px solid var(--about-violet-border);
  border-radius: 20px;
  background: var(--about-card-bg);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.page-about .system-card:hover,
.page-about .system-card:focus-within {
  transform: translateY(-3px);
}

.page-about .system-card__num {
  display: block;
  margin-bottom: 12px;
  font-size: 1.2rem;
  line-height: 1;
  color: var(--color-violet-soft);
}

.page-about .system-card h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--color-white);
}

.page-about .system-card p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.7;
  color: rgba(245, 247, 250, 0.82);
}

.page-about .system-card--green {
  border-color: rgba(57, 255, 20, 0.3);
}

.page-about .system-card--green .system-card__num {
  color: var(--color-green);
}

.page-about .system-card--violet {
  border-color: var(--about-violet-border);
}

.page-about .system-card--gold {
  border-color: rgba(255, 215, 0, 0.32);
}

.page-about .system-card--gold .system-card__num {
  color: var(--color-gold);
}

.page-about .system-card--deep {
  border-color: rgba(160, 174, 192, 0.22);
}

.page-about .tech-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 24px;
}

.page-about .tech-flow__item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 14px;
  padding: 20px 18px;
  border: 1px solid rgba(57, 255, 20, 0.2);
  border-left: 2px solid var(--color-green);
  border-radius: 18px;
  background: rgba(11, 11, 26, 0.5);
  transition: background 0.25s ease, border-color 0.25s ease;
}

.page-about .tech-flow__item:hover,
.page-about .tech-flow__item:focus-within {
  background: rgba(57, 255, 20, 0.06);
  border-color: rgba(57, 255, 20, 0.4);
}

.page-about .tech-flow__step {
  font-size: 1.06rem;
  line-height: 1.4;
  color: var(--color-green);
}

.page-about .tech-flow h3 {
  margin: 0 0 6px;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--color-white);
}

.page-about .tech-flow p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.68;
  color: rgba(245, 247, 250, 0.82);
}

.page-about .story-epilogue {
  margin-top: 72px;
  border-top: 1px solid rgba(160, 174, 192, 0.2);
  padding-top: 44px;
}

.page-about .story-epilogue__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .story-epilogue__text {
  max-width: 60ch;
}

.page-about .story-epilogue__text p {
  margin: 16px 0 0;
  font-size: 1rem;
  line-height: 1.75;
  color: rgba(245, 247, 250, 0.86);
}

.page-about .story-epilogue__links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  align-content: start;
}

.page-about .story-epilogue .btn {
  justify-content: center;
}

@media (min-width: 720px) {
  .page-about .story-hero__inner {
    display: grid;
    grid-template-columns: minmax(0, 1.45fr) minmax(250px, 0.72fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .story-quick-stats {
    grid-template-columns: 1fr;
  }

  .page-about .story-section__grid {
    grid-template-columns: minmax(0, 1.1fr) 210px;
    gap: 32px;
  }

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

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

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

  .page-about .story-epilogue__inner {
    grid-template-columns: minmax(0, 1fr) minmax(300px, 0.8fr);
    gap: 40px;
  }
}

@media (min-width: 1024px) {
  .page-about .story-shell {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 46px;
    align-items: start;
  }

  .page-about .story-shell__side {
    position: sticky;
    top: 30px;
    padding-top: 10px;
  }

  .page-about .story-chapters {
    flex-direction: column;
    gap: 8px;
    overflow: visible;
    padding: 0;
  }

  .page-about .story-chapters__link {
    flex-direction: column;
    align-items: stretch;
    min-width: 0;
    padding: 14px 16px;
  }

  .page-about .story-chapters__tip {
    display: block;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    font-size: 0.78rem;
    line-height: 1.5;
    color: var(--color-silver);
    transition: max-height 0.3s ease, opacity 0.25s ease, margin-top 0.25s ease;
  }

  .page-about .story-chapters__link:hover .story-chapters__tip,
  .page-about .story-chapters__link:focus-visible .story-chapters__tip {
    max-height: 44px;
    opacity: 1;
    margin-top: 7px;
  }

  .page-about .story-shell__note {
    display: block;
    margin-top: 22px;
  }

  .page-about .story-shell__content {
    gap: 8px;
  }

  .page-about .story-section {
    padding: 46px 0 18px;
  }

  .page-about .story-section__grid {
    grid-template-columns: minmax(0, 1.25fr) 230px;
    gap: 46px;
  }

  .page-about .story-section__aside {
    border-top: none;
    border-left: 1px solid rgba(160, 174, 192, 0.2);
    padding-top: 4px;
    padding-left: 18px;
  }

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

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

@media (min-width: 1240px) {
  .page-about .story-shell {
    grid-template-columns: 230px minmax(0, 1fr);
    gap: 52px;
  }

  .page-about .story-section__grid {
    grid-template-columns: minmax(0, 1.3fr) 240px;
    gap: 52px;
  }

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

  .page-about .story-hero__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.6fr);
    gap: 56px;
  }
}