.page-about {
  --p-about-gold: #D4AF37;
  --p-about-gold-soft: rgba(212, 175, 55, 0.2);
  --p-about-crimson: #7A1F2B;
  --p-about-line: #1F3A4F;
  --p-about-ivory: #F5F0E6;
  --p-about-moon: #B8C4D0;
  --p-about-night: #0B1F33;
  --p-about-abyss: #0A1118;
  --p-about-midnight: #08101A;
  --p-about-blue-deep: #102033;
  --p-about-rail-width: 96px;
  font-family: var(--font-sans);
  color: var(--c-ivory);
  line-height: 1.65;
  overflow-x: hidden;
  background:
    radial-gradient(ellipse at 88% -6%, rgba(212, 175, 55, 0.14), transparent 42%),
    radial-gradient(ellipse at 10% 90%, rgba(31, 58, 79, 0.28), transparent 48%),
    var(--p-about-night);
}

.page-about .breadcrumbs {
  max-width: 1440px;
  margin-inline: auto;
  padding: 22px 24px 0;
  font-size: var(--text-micro);
  letter-spacing: 0.1em;
  color: var(--p-about-moon);
}

.page-about .breadcrumbs a {
  color: var(--p-about-moon);
  text-decoration: none;
  transition: color 0.3s ease;
}

.page-about .breadcrumbs a:hover {
  color: var(--p-about-gold);
}

.page-about .breadcrumbs__sep {
  margin-inline: 8px;
  color: var(--p-about-line);
}

.page-about .section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: var(--text-mini);
  letter-spacing: 0.22em;
  color: var(--p-about-gold);
  text-transform: uppercase;
}

.page-about .section-label::before {
  content: '';
  width: 28px;
  height: 1px;
  background: var(--p-about-gold);
}

.page-about .p-about-hero {
  position: relative;
  padding-block: 72px 56px;
}

.page-about .p-about-hero__inner {
  display: grid;
  gap: 40px;
}

.page-about .p-about-hero__body {
  max-width: 880px;
}

.page-about .p-about-hero__body h1 {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(38px, 6vw, 64px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 18px 0 24px;
  color: var(--p-about-ivory);
}

.page-about .p-about-hero__body h1::after {
  content: '';
  display: block;
  width: 76px;
  height: 2px;
  margin-top: 22px;
  background: linear-gradient(90deg, var(--p-about-gold), transparent 78%);
}

.page-about .p-about-hero__lede {
  max-width: 620px;
  margin: 0 0 28px;
  font-size: var(--text-base);
  color: var(--p-about-moon);
}

.page-about .p-about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .p-about-hero__aside {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--p-about-line);
}

.page-about .p-about-hero__rotate {
  font-family: var(--font-serif);
  writing-mode: vertical-rl;
  font-size: var(--text-note);
  letter-spacing: 0.28em;
  color: var(--p-about-gold);
  opacity: 0.78;
}

.page-about .p-about-hero__seal {
  flex: 0 0 auto;
  width: 74px;
  height: 74px;
  border: 1px solid var(--p-about-gold);
  color: var(--p-about-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  transform: rotate(45deg);
  transition: transform 0.5s var(--ease), box-shadow 0.5s ease;
}

.page-about .p-about-hero__seal:hover {
  transform: rotate(225deg);
  box-shadow: 0 0 0 6px rgba(212, 175, 55, 0.08);
}

.page-about .p-about-hero__seal svg {
  width: 36px;
  height: 36px;
  transform: rotate(-45deg);
}

.page-about .p-about-ch {
  scroll-margin-top: 88px;
}

.page-about .p-about-ch__inner {
  display: grid;
  gap: 28px;
  padding-block: 64px;
  border-top: 1px solid var(--p-about-line);
}

.page-about .p-about-ch--milestone .p-about-ch__inner {
  background: linear-gradient(180deg, transparent, rgba(212, 175, 55, 0.04) 24%, transparent 82%);
}

.page-about .p-about-ch__rail {
  display: flex;
  align-items: baseline;
  gap: 16px;
}

.page-about .p-about-ch__num {
  font-family: var(--font-serif);
  font-size: clamp(52px, 9vw, 120px);
  line-height: 0.9;
  font-weight: 800;
  letter-spacing: -0.05em;
  color: transparent;
  -webkit-text-stroke: 1px var(--p-about-gold);
  opacity: 0.9;
  user-select: none;
  transition: opacity 0.4s ease;
}

.page-about .p-about-ch:hover .p-about-ch__num {
  opacity: 0.62;
}

.page-about .p-about-ch__rail-label {
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  letter-spacing: 0.18em;
  color: var(--p-about-moon);
  padding-left: 12px;
  border-left: 1px solid var(--p-about-line);
}

.page-about .p-about-ch__content {
  min-width: 0;
}

.page-about .p-about-ch__content .chapter__head {
  margin-bottom: 18px;
}

.page-about .p-about-ch__content .chapter__label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-mini);
  letter-spacing: 0.24em;
  color: var(--p-about-gold);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.page-about .p-about-ch__content .chapter__head h2 {
  font-family: var(--font-serif);
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 800;
  line-height: 1.3;
  color: var(--p-about-ivory);
}

.page-about .p-about-ch__lead {
  max-width: 720px;
  margin: 0 0 28px;
  color: var(--p-about-moon);
  font-size: var(--text-base);
}

.page-about .p-about-ch__split {
  display: grid;
  gap: 24px;
  margin-top: 8px;
}

.page-about .p-about-ch__main p,
.page-about .p-about-ch__lead + .p-about-ch__main p {
  color: var(--p-about-moon);
  font-size: var(--text-base);
  margin-bottom: 18px;
}

.page-about .p-about-ch__quote {
  align-self: end;
}

.page-about .p-about-ch__quote-card {
  padding: 28px 24px;
  background: var(--p-about-abyss);
  border: 1px solid var(--p-about-line);
  border-left: 2px solid var(--p-about-gold);
  border-radius: var(--radius);
}

.page-about .p-about-ch__quote-card p {
  font-family: var(--font-serif);
  font-size: var(--text-sm);
  font-weight: 700;
  line-height: 1.68;
  color: var(--p-about-ivory);
  margin: 0;
}

.page-about .p-about-ch__quote .note {
  display: block;
  margin-top: 12px;
  color: var(--p-about-moon);
  font-size: var(--text-micro);
  letter-spacing: 0.08em;
}

.page-about .p-about-index__filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.page-about .p-about-index__filter a {
  font-size: var(--text-note);
  color: var(--p-about-moon);
  border: 1px solid var(--p-about-line);
  background: rgba(255, 255, 255, 0.02);
  padding: 7px 16px;
  text-decoration: none;
  border-radius: 999px;
  transition: color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.page-about .p-about-index__filter a:hover,
.page-about .p-about-index__filter a:focus {
  color: var(--p-about-gold);
  border-color: var(--p-about-gold);
  box-shadow: inset 0 0 0 1px rgba(212, 175, 55, 0.12);
}

.page-about .p-about-index__grid {
  display: grid;
  gap: 16px;
  margin-bottom: 32px;
}

.page-about .p-about-index__card {
  position: relative;
  padding: 26px 24px;
  border: 1px solid var(--p-about-line);
  border-radius: var(--radius);
  background: var(--c-glass);
  scroll-margin-top: 96px;
  transition: transform 0.35s var(--ease), border-color 0.35s ease, box-shadow 0.35s ease;
}

.page-about .p-about-index__card:hover,
.page-about .p-about-index__card:target {
  border-color: var(--p-about-gold);
  box-shadow: 0 0 0 1px rgba(212, 175, 55, 0.18), 0 14px 44px rgba(0, 0, 0, 0.32);
  transform: translateY(-4px);
}

.page-about .p-about-index__icon {
  width: 44px;
  height: 44px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--p-about-line);
  border-radius: var(--radius);
  background: var(--p-about-blue-deep);
  color: var(--p-about-gold);
}

.page-about .p-about-index__icon svg {
  width: 22px;
  height: 22px;
}

.page-about .p-about-index__card h3 {
  font-family: var(--font-serif);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--p-about-ivory);
  margin-bottom: 8px;
}

.page-about .p-about-index__card p {
  font-size: var(--text-note);
  line-height: 1.6;
  color: var(--p-about-moon);
  margin: 0;
}

.page-about .p-about-media {
  position: relative;
  margin: 32px 0;
  border: 1px solid var(--p-about-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--p-about-midnight);
}

.page-about .p-about-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--p-about-midnight);
}

.page-about .p-about-media[data-caption]::after {
  content: attr(data-caption);
  display: block;
  padding: 12px 16px;
  font-size: var(--text-micro);
  color: var(--p-about-moon);
  border-top: 1px solid var(--p-about-line);
  background: rgba(8, 16, 26, 0.72);
}

.page-about .p-about-timeline {
  position: relative;
  padding-left: 40px;
  margin: 32px 0 20px;
}

.page-about .p-about-timeline::before {
  content: '';
  position: absolute;
  left: 14px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(to bottom, var(--p-about-gold), var(--p-about-line) 70%, transparent);
}

.page-about .p-about-timeline__item {
  position: relative;
  padding-bottom: 28px;
}

.page-about .p-about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .p-about-timeline__node {
  position: absolute;
  left: -40px;
  top: 6px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--p-about-gold);
  background: var(--p-about-abyss);
  color: var(--p-about-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  cursor: default;
  transition: box-shadow 0.3s ease, background 0.3s ease;
}

.page-about .p-about-timeline__node:hover,
.page-about .p-about-timeline__node:focus {
  background: var(--p-about-blue-deep);
  box-shadow: 0 0 0 6px rgba(212, 175, 55, 0.1);
}

.page-about .p-about-timeline__node svg {
  width: 14px;
  height: 14px;
}

.page-about .p-about-timeline__tip {
  position: absolute;
  left: calc(100% + 14px);
  top: 50%;
  transform: translateY(calc(-50% + 6px)) translateX(-6px);
  white-space: nowrap;
  background: var(--p-about-abyss);
  border: 1px solid var(--p-about-gold);
  color: var(--p-about-gold);
  font-size: var(--text-micro);
  letter-spacing: 0.06em;
  padding: 6px 12px;
  border-radius: 2px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
  z-index: 10;
}

.page-about .p-about-timeline__node:hover .p-about-timeline__tip,
.page-about .p-about-timeline__node:focus .p-about-timeline__tip {
  opacity: 1;
  transform: translateY(calc(-50% + 6px)) translateX(0);
}

.page-about .p-about-timeline__content {
  background: var(--c-glass);
  border-left: 2px solid rgba(212, 175, 55, 0.35);
  border-radius: var(--radius);
  padding: 22px 24px;
  transition: background 0.35s ease;
}

.page-about .p-about-timeline__content:hover {
  background: rgba(255, 255, 255, 0.1);
}

.page-about .p-about-timeline__content h3 {
  font-family: var(--font-serif);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--p-about-ivory);
  margin-bottom: 8px;
}

.page-about .p-about-timeline__content p {
  margin: 0 0 12px;
  font-size: var(--text-note);
  color: var(--p-about-moon);
  line-height: 1.6;
}

.page-about .p-about-timeline__content .version-chip {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-mini);
  letter-spacing: 0.08em;
  color: var(--p-about-gold);
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid rgba(212, 175, 55, 0.3);
  padding: 4px 12px;
  border-radius: 2px;
}

.page-about .p-about-compare {
  margin: 8px 0 12px;
  overflow-x: auto;
  border: 1px solid var(--p-about-line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.03);
}

.page-about .p-about-compare table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: var(--text-note);
}

.page-about .p-about-compare th {
  font-family: var(--font-mono);
  font-weight: 500;
  text-align: left;
  padding: 16px 20px;
  background: var(--p-about-blue-deep);
  color: var(--p-about-gold);
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--p-about-line);
  white-space: nowrap;
}

.page-about .p-about-compare td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--p-about-line);
  color: var(--p-about-moon);
  line-height: 1.5;
}

.page-about .p-about-compare tr:last-child td {
  border-bottom: none;
}

.page-about .p-about-compare td:first-child {
  color: var(--p-about-ivory);
  font-weight: 500;
  white-space: nowrap;
}

.page-about .p-about-compare + .note {
  display: block;
  margin-top: 8px;
  color: var(--p-about-moon);
  font-size: var(--text-micro);
  letter-spacing: 0.04em;
}

.page-about .p-about-compare__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .p-about-services {
  display: grid;
  gap: 16px;
  margin: 28px 0 20px;
}

.page-about .p-about-services__item {
  position: relative;
  padding: 28px 24px 26px;
  background: var(--p-about-abyss);
  border: 1px solid var(--p-about-line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.35s ease, transform 0.35s var(--ease);
}

.page-about .p-about-services__item:hover {
  border-color: rgba(212, 175, 55, 0.5);
  transform: translateY(-2px);
}

.page-about .p-about-services__item::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--p-about-gold), transparent 80%);
  opacity: 0.8;
}

.page-about .p-about-services__item h3 {
  font-family: var(--font-serif);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--p-about-ivory);
  margin-bottom: 8px;
  padding-right: 40px;
}

.page-about .p-about-services__item p {
  font-size: var(--text-note);
  line-height: 1.6;
  color: var(--p-about-moon);
  margin: 0;
}

.page-about .p-about-services__index {
  position: absolute;
  right: 18px;
  top: 18px;
  font-family: var(--font-mono);
  font-size: var(--text-mini);
  color: var(--p-about-gold);
  opacity: 0.55;
  letter-spacing: 0.08em;
}

.page-about .p-about-principle__list {
  display: grid;
  gap: 16px;
  margin: 24px 0 28px;
}

.page-about .p-about-principle__item {
  padding: 24px;
  border-left: 2px solid var(--p-about-gold);
  border-radius: var(--radius);
  background: var(--c-glass);
  transition: background 0.35s ease;
}

.page-about .p-about-principle__item:hover {
  background: rgba(255, 255, 255, 0.09);
}

.page-about .p-about-principle__item h3 {
  font-family: var(--font-serif);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--p-about-ivory);
  margin-bottom: 8px;
}

.page-about .p-about-principle__item p {
  font-size: var(--text-note);
  line-height: 1.6;
  color: var(--p-about-moon);
  margin: 0;
}

.page-about .p-about-principle__note {
  padding: 24px;
  margin-bottom: 28px;
  font-size: var(--text-note);
  color: var(--p-about-moon);
  line-height: 1.7;
}

.page-about .p-about-principle__note a {
  color: var(--p-about-gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(212, 175, 55, 0.35);
}

.page-about .p-about-principle__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding-bottom: 16px;
}

@media (min-width: 768px) {
  .page-about .p-about-index__grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .page-about .p-about-principle__list {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .p-about-principle__item {
    padding: 26px 22px;
  }

  .page-about .p-about-hero__aside {
    justify-content: flex-start;
  }
}

@media (min-width: 1024px) {
  .page-about .p-about-hero__inner {
    grid-template-columns: minmax(0, 6fr) minmax(280px, 4fr);
    gap: 48px;
    align-items: end;
  }

  .page-about .p-about-hero__aside {
    justify-content: flex-end;
    border-top: none;
    border-left: 1px solid var(--p-about-line);
    padding-left: 40px;
    padding-top: 0;
  }

  .page-about .p-about-ch__inner {
    grid-template-columns: var(--p-about-rail-width) minmax(0, 1fr);
    gap: clamp(40px, 6vw, 96px);
    padding-block: 96px;
  }

  .page-about .p-about-ch__rail {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 12px;
    padding-top: 10px;
  }

  .page-about .p-about-ch__rail-label {
    border-left: none;
    border-top: 1px solid var(--p-about-line);
    padding-left: 0;
    padding-top: 12px;
    writing-mode: horizontal-tb;
  }

  .page-about .p-about-ch__split {
    grid-template-columns: minmax(0, 3fr) minmax(280px, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .p-about-ch__quote {
    margin-top: 36px;
  }

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

  .page-about .p-about-compare table {
    min-width: 680px;
  }

  .page-about .p-about-timeline__content {
    padding: 26px 32px;
  }

  .page-about .p-about-media--wide img {
    aspect-ratio: 21 / 9;
    object-fit: cover;
  }

  .page-about .media-frame--square img {
    max-width: 640px;
    margin-inline: auto;
  }
}