.page-about {
  --about-wine-deep: #241016;
  --about-violet-deep: #14102a;
  --about-card-bg: rgba(10, 17, 40, 0.55);
  background: var(--color-ink);
  color: var(--color-text);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .about-container {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: 20px;
}

.page-about [hidden] {
  display: none !important;
}

.page-about .about-hero {
  position: relative;
  padding: 36px 20px 48px;
  background: var(--color-ink);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: -70px;
  width: 280px;
  height: 280px;
  background: linear-gradient(135deg, rgba(245, 179, 1, 0.28), transparent 70%);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 920px;
}

.page-about .about-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: 28px;
}

.page-about .about-breadcrumb a {
  color: var(--color-gold);
  text-decoration: none;
}

.page-about .about-breadcrumb a:hover,
.page-about .about-breadcrumb a:focus-visible {
  text-decoration: underline;
  outline: none;
}

.page-about .about-hero__kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  color: var(--color-gold);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.page-about .about-hero__kicker-line {
  width: 36px;
  height: 2px;
  background: var(--color-gold);
  display: inline-block;
  flex-shrink: 0;
}

.page-about .about-hero__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.875rem);
  line-height: 1.12;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

.page-about .about-hero__lead {
  max-width: 780px;
  margin: 0 0 24px;
  color: var(--color-text);
  font-size: 1.0625rem;
  line-height: 1.8;
}

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

.page-about .about-hero__actions .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  border-radius: 0;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-about .about-hero__actions .btn--primary {
  background: var(--color-gold);
  color: var(--color-ink);
  border: 1px solid var(--color-gold);
}

.page-about .about-hero__actions .btn--ghost {
  background: transparent;
  color: var(--color-gold);
  border: 1px solid var(--color-line);
}

.page-about .about-hero__actions .btn:hover,
.page-about .about-hero__actions .btn:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(245, 179, 1, 0.18);
  outline: none;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 32px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--color-line);
  list-style: none;
}

.page-about .about-hero__stat {
  padding: 12px 14px;
  background: var(--color-coal);
  border-left: 3px solid var(--color-gold);
}

.page-about .about-hero__stat dt {
  margin: 0 0 4px;
  font-size: 0.75rem;
  color: var(--color-muted);
}

.page-about .about-hero__stat dd {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-gold);
}

.page-about .about-layout {
  max-width: 1400px;
  margin-inline: auto;
  padding-inline: 20px;
}

.page-about .about-toc {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 14px 0;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-toc::-webkit-scrollbar {
  display: none;
}

.page-about .about-toc__label {
  flex-shrink: 0;
  align-self: center;
  margin-right: 4px;
  color: var(--color-muted);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
}

.page-about .about-toc__link {
  flex-shrink: 0;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 8px 12px;
  background: var(--color-coal);
  border: 1px solid transparent;
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.875rem;
}

.page-about .about-toc__link span {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--color-gold);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  border-color: var(--color-gold);
  color: var(--color-gold);
  outline: none;
}

.page-about .about-chapter {
  padding: 56px 0 64px;
  border-top: 1px solid var(--color-line);
}

.page-about .about-chapter--brand {
  background: linear-gradient(135deg, var(--color-ink) 0%, var(--color-teal) 100%);
}

.page-about .about-chapter--data {
  background: linear-gradient(135deg, var(--color-ink) 0%, var(--about-violet-deep) 55%, var(--color-violet) 130%);
}

.page-about .about-chapter--timeline {
  background:
    repeating-linear-gradient(90deg, rgba(245, 179, 1, 0.04) 0px, rgba(245, 179, 1, 0.04) 1px, transparent 1px, transparent 48px),
    var(--color-ink);
}

.page-about .about-chapter--boundary {
  background: linear-gradient(135deg, var(--about-wine-deep) 0%, var(--color-wine) 120%);
}

.page-about .about-chapter--faq {
  background: var(--color-coal);
}

.page-about .about-chapter__head {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
  padding-top: 16px;
}

.page-about .about-chapter__head::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--color-gold), transparent 70%);
}

.page-about .about-chapter__num {
  flex-shrink: 0;
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
  border: 1px solid var(--color-line);
  font-family: var(--font-display);
  font-size: 2.5rem;
  line-height: 1;
  color: var(--color-gold);
  opacity: 0.8;
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  line-height: 1.2;
  color: var(--color-text);
}

.page-about .about-chapter__sub {
  margin: 4px 0 0;
  color: var(--color-muted);
  font-size: 0.875rem;
}

.page-about .about-chapter__body p {
  margin: 0 0 18px;
  color: var(--color-text);
  line-height: 1.85;
}

.page-about .about-principles {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.page-about .about-principles__card {
  background: var(--about-card-bg);
  border: 1px solid var(--color-line);
  padding: 18px;
}

.page-about .about-principles__card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  color: var(--color-gold);
}

.page-about .about-principles__card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-about .about-data-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 24px 0;
}

.page-about .about-data-stats__item {
  background: var(--about-card-bg);
  border: 1px solid var(--color-line);
  padding: 18px 16px;
  text-align: center;
}

.page-about .about-data-stats__item strong {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  line-height: 1;
  color: var(--color-gold);
}

.page-about .about-data-stats__item span {
  display: block;
  margin-top: 8px;
  color: var(--color-text);
  font-size: 0.875rem;
}

.page-about .about-media {
  margin: 24px 0;
  padding: 10px;
  background: var(--about-card-bg);
  border: 1px solid var(--color-line);
}

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

.page-about .about-media figcaption {
  padding: 10px 4px 2px;
  color: var(--color-muted);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
}

.page-about .about-process {
  list-style: none;
  margin: 24px 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-process li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: var(--about-card-bg);
  border-left: 3px solid var(--color-gold);
  padding: 14px 16px;
}

.page-about .about-process li span {
  flex-shrink: 0;
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-gold);
  white-space: nowrap;
}

.page-about .about-process li p {
  margin: 0;
  line-height: 1.7;
}

.page-about .about-timeline {
  display: grid;
  gap: 12px;
  margin: 24px 0;
}

.page-about .about-timeline__item {
  background: var(--about-card-bg);
  border: 1px solid var(--color-line);
  padding: 16px;
}

.page-about .about-timeline__node {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 0;
  background: transparent;
  border: 0;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-body);
}

.page-about .about-timeline__node strong {
  flex-shrink: 0;
  width: 84px;
  height: 44px;
  display: grid;
  place-items: center;
  background: rgba(245, 179, 1, 0.08);
  border: 1px solid var(--color-line);
  font-family: var(--font-display);
  font-size: 1.375rem;
  color: var(--color-gold);
}

.page-about .about-timeline__node span {
  color: var(--color-text);
  font-size: 0.9375rem;
  font-weight: 500;
}

.page-about .about-timeline__node::after {
  content: "+";
  margin-left: auto;
  color: var(--color-gold);
  font-size: 1.4rem;
  line-height: 1;
}

.page-about .about-timeline__node[aria-expanded="true"]::after {
  content: "–";
}

.page-about .about-timeline__node:hover span,
.page-about .about-timeline__node:focus-visible span {
  color: var(--color-gold);
}

.page-about .about-timeline__node:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
}

.page-about .about-timeline__detail {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--color-line);
  color: var(--color-text);
  font-size: 0.9375rem;
  line-height: 1.65;
}

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

.page-about .about-boundary-grid {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.page-about .about-boundary-col {
  padding: 18px;
  background: var(--about-card-bg);
  border: 1px solid var(--color-line);
}

.page-about .about-boundary-col h3 {
  margin: 0 0 12px;
  font-size: 1rem;
  color: var(--color-gold);
}

.page-about .about-boundary-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-boundary-col li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 8px;
  line-height: 1.6;
}

.page-about .about-boundary-col--yes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.52em;
  width: 7px;
  height: 7px;
  background: var(--color-neon);
}

.page-about .about-boundary-col--no li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.52em;
  width: 7px;
  height: 7px;
  border: 1px solid var(--color-muted);
}

.page-about .about-boundary-note {
  margin-top: 18px;
  color: var(--color-gold);
  font-weight: 600;
  line-height: 1.6;
}

.page-about .about-faq {
  margin-top: 24px;
  border-top: 1px solid var(--color-line);
}

.page-about .about-faq__item {
  border-bottom: 1px solid var(--color-line);
}

.page-about .about-faq__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 4px;
  background: transparent;
  border: 0;
  color: var(--color-text);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-body);
}

.page-about .about-faq__trigger:hover,
.page-about .about-faq__trigger[aria-expanded="true"] {
  color: var(--color-gold);
}

.page-about .about-faq__trigger:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
}

.page-about .about-faq__icon {
  flex-shrink: 0;
  position: relative;
  width: 24px;
  height: 24px;
  border: 1px solid var(--color-gold);
}

.page-about .about-faq__icon::before,
.page-about .about-faq__icon::after {
  content: "";
  position: absolute;
  background: var(--color-gold);
}

.page-about .about-faq__icon::before {
  width: 10px;
  height: 1px;
  left: 6px;
  top: 11px;
}

.page-about .about-faq__icon::after {
  width: 1px;
  height: 10px;
  left: 11px;
  top: 6px;
}

.page-about .about-faq__trigger[aria-expanded="true"] .about-faq__icon::after {
  background: transparent;
}

.page-about .about-faq__panel {
  padding: 0 4px 18px;
  color: var(--color-text);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.page-about .about-faq-more {
  margin-top: 24px;
  color: var(--color-muted);
  line-height: 1.8;
}

.page-about .about-faq-more a {
  color: var(--color-gold);
  text-decoration: none;
}

.page-about .about-faq-more a:hover,
.page-about .about-faq-more a:focus-visible {
  text-decoration: underline;
  outline: none;
}

.page-about .about-cta {
  padding: 48px 20px;
  background: var(--color-ink);
  border-top: 1px solid var(--color-line);
}

.page-about .about-cta__label {
  margin: 0 0 18px;
  color: var(--color-muted);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
}

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

.page-about .about-cta__links .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: 0;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-about .about-cta__links .btn--primary {
  background: var(--color-gold);
  color: var(--color-ink);
  border: 1px solid var(--color-gold);
}

.page-about .about-cta__links .btn--ghost {
  background: transparent;
  color: var(--color-gold);
  border: 1px solid var(--color-line);
}

.page-about .about-cta__links .btn:hover,
.page-about .about-cta__links .btn:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(245, 179, 1, 0.16);
  outline: none;
}

@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, 1fr);
  }

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

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

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

@media (min-width: 992px) {
  .page-about .about-hero {
    padding: 56px 24px 72px;
  }

  .page-about .about-hero__inner {
    max-width: 960px;
  }

  .page-about .about-hero__lead {
    font-size: 1.125rem;
  }

  .page-about .about-layout {
    display: grid;
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 48px;
    padding-block: 48px;
  }

  .page-about .about-toc {
    position: sticky;
    top: 24px;
    flex-direction: column;
    align-items: stretch;
    align-self: start;
    padding: 0;
    overflow: visible;
    border-left: 1px solid var(--color-line);
    padding-left: 16px;
  }

  .page-about .about-toc__label {
    margin: 0 0 12px;
  }

  .page-about .about-toc__link {
    justify-content: space-between;
    padding: 12px 14px;
    background: transparent;
  }

  .page-about .about-toc__link:hover,
  .page-about .about-toc__link:focus-visible {
    background: var(--color-coal);
  }

  .page-about .about-chapter {
    padding: 72px 0 80px;
  }

  .page-about .about-media--portrait {
    max-width: 720px;
    margin-inline: auto;
  }

  .page-about .about-media--square {
    max-width: 480px;
    margin-inline: auto;
  }

  .page-about .about-timeline {
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
  }

  .page-about .about-timeline__item {
    background: transparent;
    border: 0;
    border-top: 3px solid var(--color-gold);
    padding: 16px 12px 0 0;
  }

  .page-about .about-timeline__node {
    min-height: 44px;
  }

  .page-about .about-boundary-grid {
    grid-template-columns: 1fr 1fr;
    gap: 18px;
  }

  .page-about .about-cta {
    padding: 64px 24px;
  }
}