.page-about {
  --about-ledger-line: rgba(10, 31, 60, 0.055);
  --about-gold-soft: rgba(201, 162, 39, 0.18);
  --about-gold-line: rgba(201, 162, 39, 0.42);
  --about-dark-glow: rgba(0, 210, 223, 0.08);
  --about-card-shadow: 0 16px 40px rgba(10, 31, 60, 0.1);
  color: var(--color-ink);
  background:
    linear-gradient(var(--about-ledger-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-ledger-line) 1px, transparent 1px),
    var(--color-warmwhite);
  background-size: 26px 26px, 26px 26px, auto;
  overflow-x: hidden;
}

.page-about .about-hero {
  position: relative;
  margin-top: var(--space-lg);
  background: var(--color-warmwhite);
  border: 1px solid rgba(10, 31, 60, 0.08);
  border-left: 6px solid var(--color-gold);
  border-radius: var(--radius-organic);
  padding: var(--space-xl) var(--space-lg);
  overflow: hidden;
  box-shadow: var(--about-card-shadow);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
  max-width: 980px;
}

.page-about .about-hero__badge {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.page-about .about-hero__badge-code,
.page-about .about-hero__badge-period {
  font-family: var(--font-number);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
}

.page-about .about-hero__badge-code {
  color: var(--color-deep);
  background: var(--about-gold-soft);
  border: 1px solid var(--about-gold-line);
}

.page-about .about-hero__badge-period {
  color: var(--color-warmwhite);
  background: var(--color-deep);
}

.page-about .about-hero h1 {
  font-family: var(--font-title);
  font-size: clamp(1.9rem, 5vw, 3.2rem);
  line-height: 1.3;
  color: var(--color-deep);
  margin: 0 0 var(--space-lg);
  letter-spacing: 0.02em;
  text-shadow: 0 1px 0 rgba(201, 162, 39, 0.3);
}

.page-about .about-hero__lead {
  font-size: 1.06rem;
  line-height: 1.85;
  color: rgba(27, 27, 27, 0.82);
  max-width: 60ch;
  margin: 0 0 var(--space-xl);
}

.page-about .about-hero__lead strong {
  color: var(--color-deep);
  font-weight: 600;
  border-bottom: 2px solid var(--color-electric);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: rgba(10, 31, 60, 0.12);
  border: 1px solid rgba(10, 31, 60, 0.12);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 0;
}

.page-about .about-hero__stat {
  background: var(--color-warmwhite);
  padding: var(--space-md) var(--space-lg);
  margin: 0;
}

.page-about .about-hero__stat dt {
  font-size: 0.8rem;
  color: rgba(27, 27, 27, 0.62);
}

.page-about .about-hero__stat dd {
  font-family: var(--font-number);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--color-deep);
  margin: 0.2rem 0 0;
}

.page-about .about-hero__deco {
  position: absolute;
  right: -4rem;
  top: 2rem;
  font-family: var(--font-number);
  font-size: clamp(8rem, 16vw, 14rem);
  font-weight: 700;
  line-height: 1;
  color: rgba(10, 31, 60, 0.055);
  z-index: 1;
  user-select: none;
  pointer-events: none;
}

.page-about .about-layout {
  display: grid;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.page-about .about-index {
  z-index: 10;
}

.page-about .about-index__inner {
  background: var(--color-deep);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  color: var(--color-mercury);
  box-shadow: 0 10px 28px rgba(10, 31, 60, 0.25);
}

.page-about .about-index__caption {
  margin: 0 0 var(--space-sm);
  padding: 0 var(--space-sm);
  font-family: var(--font-number);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-gold);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: var(--space-sm);
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__item {
  flex: 0 0 auto;
}

.page-about .about-index__item a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 0.9rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.08);
  text-decoration: none;
  transition: background var(--transition), border-color var(--transition);
}

.page-about .about-index__item a:hover {
  background: rgba(201, 162, 39, 0.22);
  border-color: var(--color-gold);
}

.page-about .about-index__num {
  font-family: var(--font-number);
  font-weight: 700;
  color: var(--color-gold);
  font-size: 0.95rem;
}

.page-about .about-index__label {
  font-size: 0.82rem;
  color: var(--color-mercury);
}

.page-about .about-content {
  display: grid;
  gap: var(--space-xl);
  min-width: 0;
}

.page-about .about-chapter {
  position: relative;
  scroll-margin-top: calc(var(--header-height) + 20px);
}

.page-about .about-chapter__head {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-deep);
}

.page-about .about-chapter__head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 42px;
  height: 4px;
  background: var(--color-gold);
}

.page-about .about-chapter__kicker {
  font-family: var(--font-number);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  color: var(--color-red);
  background: rgba(178, 58, 72, 0.08);
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  margin: 0;
}

.page-about .about-chapter__head h2 {
  font-family: var(--font-title);
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  margin: 0;
  color: var(--color-deep);
}

.page-about .about-chapter__grid {
  display: grid;
  gap: var(--space-lg);
}

.page-about .about-chapter__text p {
  line-height: 1.85;
  margin: 0 0 var(--space-md);
  color: rgba(27, 27, 27, 0.85);
}

.page-about .about-chapter__text a {
  color: var(--color-deep);
  text-decoration: underline;
  text-decoration-color: var(--color-electric);
  text-underline-offset: 4px;
  transition: color var(--transition);
}

.page-about .about-chapter__text a:hover {
  color: var(--color-electric);
}

.page-about .about-figure {
  margin: 0;
}

.page-about .about-figure img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

.page-about .about-figure figcaption {
  font-size: 0.82rem;
  color: rgba(27, 27, 27, 0.6);
  margin-top: var(--space-sm);
  line-height: 1.6;
}

.page-about .about-figure--ledger {
  position: relative;
  background: var(--color-lighttexture);
  border: 1px solid rgba(201, 162, 39, 0.3);
  border-radius: var(--radius-lg);
  padding: 0.8rem;
  box-shadow: 14px 14px 0 rgba(10, 31, 60, 0.06);
}

.page-about .about-figure--ledger img {
  background: var(--color-warmwhite);
  border: 1px solid rgba(10, 31, 60, 0.08);
}

.page-about .about-chapter--dark {
  background: linear-gradient(145deg, var(--color-deep) 0%, var(--color-deep-gray) 100%);
  border-radius: calc(var(--radius-lg) * 1.4);
  padding: var(--space-lg) var(--space-md);
  color: var(--color-mercury);
  box-shadow: 0 24px 52px rgba(10, 31, 60, 0.28);
  overflow: hidden;
}

.page-about .about-chapter--dark .about-chapter__head {
  border-bottom-color: rgba(240, 240, 240, 0.15);
}

.page-about .about-chapter--dark .about-chapter__kicker {
  color: var(--color-gold);
  background: rgba(201, 162, 39, 0.14);
}

.page-about .about-chapter--dark .about-chapter__head h2 {
  color: var(--color-warmwhite);
}

.page-about .about-chapter--dark .about-chapter__text p {
  color: rgba(240, 240, 240, 0.85);
}

.page-about .about-expansion {
  display: grid;
  gap: var(--space-lg);
}

.page-about .about-figure--chart {
  background: var(--color-warmwhite);
  border-radius: var(--radius-lg);
  padding: 1rem;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.25);
}

.page-about .about-expansion__lead {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-gold);
  line-height: 1.8;
  margin: 0 0 var(--space-md);
}

.page-about .about-expansion__body p:not(.about-expansion__lead) {
  line-height: 1.85;
  color: rgba(240, 240, 240, 0.82);
  margin: 0 0 var(--space-md);
}

.page-about .about-expansion__timeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-top: var(--space-lg);
  border-top: 1px solid rgba(240, 240, 240, 0.14);
  padding-top: var(--space-md);
}

.page-about .about-expansion__timeline-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: 0.5rem 0;
  border-bottom: 1px dashed rgba(240, 240, 240, 0.12);
}

.page-about .about-expansion__timeline-year {
  flex: 0 0 56px;
  font-family: var(--font-number);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--color-gold);
}

.page-about .about-expansion__timeline-text {
  font-size: 0.92rem;
  color: var(--color-mercury);
}

.page-about .about-figure--screen {
  background: var(--color-deep-gray);
  border: 1px solid rgba(0, 210, 223, 0.18);
  border-radius: var(--radius-lg);
  padding: 0.9rem;
  box-shadow: 0 16px 34px rgba(10, 31, 60, 0.15);
}

.page-about .about-figure--screen img {
  border: 1px solid rgba(0, 210, 223, 0.12);
}

.page-about .about-benchmark {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: var(--space-xl) 0;
}

.page-about .about-benchmark__item {
  background: var(--color-deep);
  color: var(--color-warmwhite);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  text-align: center;
  border: 1px solid rgba(201, 162, 39, 0.2);
}

.page-about .about-benchmark__num {
  display: block;
  font-family: var(--font-number);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  color: var(--color-gold);
  line-height: 1.2;
}

.page-about .about-benchmark__label {
  display: block;
  font-size: 0.78rem;
  color: rgba(240, 240, 240, 0.7);
  margin-top: 0.4rem;
}

.page-about .about-milestones {
  list-style: none;
  margin: var(--space-xl) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-left: 2px dashed var(--color-gold);
  margin-left: 8px;
}

.page-about .about-milestones__item {
  position: relative;
  padding: 0 0 var(--space-lg) var(--space-lg);
}

.page-about .about-milestones__item::before {
  content: "";
  position: absolute;
  left: -9px;
  top: 4px;
  width: 14px;
  height: 14px;
  background: var(--color-warmwhite);
  border: 3px solid var(--color-gold);
  border-radius: 50%;
}

.page-about .about-milestones__year {
  font-family: var(--font-number);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-deep);
  background: var(--about-gold-soft);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
}

.page-about .about-milestones__item p {
  margin: 0.5rem 0 0;
  color: rgba(27, 27, 27, 0.78);
  line-height: 1.75;
  font-size: 0.94rem;
}

.page-about .about-chapter--final {
  padding-bottom: var(--space-lg);
}

.page-about .about-mission {
  display: grid;
  gap: var(--space-xl);
}

.page-about .about-mission__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

.page-about .about-mission__card {
  background: var(--color-warmwhite);
  border: 1px solid rgba(10, 31, 60, 0.08);
  border-top: 4px solid var(--color-gold);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: 0 8px 20px rgba(10, 31, 60, 0.06);
  transition: transform var(--transition), box-shadow var(--transition);
}

.page-about .about-mission__card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 28px rgba(10, 31, 60, 0.12);
}

.page-about .about-mission__num {
  display: inline-block;
  font-family: var(--font-number);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-deep);
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.page-about .about-mission__card h3 {
  font-family: var(--font-title);
  font-size: 1.15rem;
  margin: 0 0 var(--space-sm);
  color: var(--color-deep);
}

.page-about .about-mission__card p {
  font-size: 0.9rem;
  line-height: 1.75;
  color: rgba(27, 27, 27, 0.72);
  margin: 0;
}

.page-about .about-mission__card a {
  color: var(--color-deep);
  text-decoration: underline;
  text-decoration-color: var(--color-electric);
  text-underline-offset: 4px;
}

.page-about .about-mission__quote {
  margin: 0;
  padding: var(--space-lg);
  background: var(--color-deep);
  border-radius: var(--radius-lg);
  color: var(--color-warmwhite);
  position: relative;
}

.page-about .about-mission__quote p {
  font-family: var(--font-title);
  font-size: clamp(1.1rem, 2.4vw, 1.4rem);
  line-height: 1.8;
  margin: 0;
}

.page-about .about-mission__quote footer {
  margin-top: var(--space-md);
  font-size: 0.85rem;
  color: rgba(240, 240, 240, 0.6);
}

.page-about .about-mission__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  align-items: center;
}

@media (min-width: 36em) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-benchmark {
    gap: var(--space-md);
  }

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

@media (min-width: 60em) {
  .page-about .about-layout {
    grid-template-columns: 220px minmax(0, 1fr);
    align-items: start;
    gap: var(--space-xl);
  }

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

  .page-about .about-index__list {
    flex-direction: column;
    overflow: visible;
  }

  .page-about .about-index__item a {
    border-radius: var(--radius-sm);
    justify-content: flex-start;
  }

  .page-about .about-chapter__grid--origin {
    grid-template-columns: 1fr 1.05fr;
    align-items: center;
  }

  .page-about .about-chapter__grid--tech {
    grid-template-columns: 0.9fr 1.1fr;
    align-items: center;
  }

  .page-about .about-expansion {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: start;
    gap: var(--space-xl);
  }

  .page-about .about-expansion__timeline {
    grid-template-columns: repeat(2, 1fr);
    column-gap: var(--space-lg);
  }

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

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

  .page-about .about-mission__quote {
    padding: var(--space-xl);
  }
}

@media (min-width: 80em) {
  .page-about .about-layout {
    grid-template-columns: 250px minmax(0, 1fr);
  }

  .page-about .about-hero h1 {
    font-size: 3.2rem;
  }

  .page-about .about-chapter__grid--tech {
    grid-template-columns: 1fr 1.2fr;
  }

  .page-about .about-benchmark {
    padding-left: var(--space-xl);
  }
}