.page-about {
  --about-line: rgba(10, 22, 40, 0.08);
  --about-gold-line: rgba(200, 164, 78, 0.35);
  --about-gold-soft: rgba(200, 164, 78, 0.12);
  --about-white-glass: rgba(255, 255, 255, 0.07);
}

.page-about .breadcrumb {
  margin-top: 1.25rem;
}

.page-about .about-hero {
  background:
    linear-gradient(rgba(200, 164, 78, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200, 164, 78, 0.04) 1px, transparent 1px),
    var(--deep);
  background-size: 24px 24px;
  border-bottom: 3px solid var(--gold);
  color: var(--cream);
  padding: 2.5rem 0 3rem;
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -180px;
  right: -120px;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(200, 164, 78, 0.18), transparent 70%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  display: grid;
  gap: 2.25rem;
  align-items: center;
}

.page-about .about-hero__eyebrow {
  color: var(--gold);
  margin-bottom: 0.5rem;
}

.page-about .about-hero__title {
  font-size: clamp(1.45rem, 3.6vw, 2.2rem);
  line-height: 1.3;
  color: var(--cream);
  margin: 0;
  letter-spacing: 0.01em;
}

.page-about .about-hero__lead {
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(245, 239, 224, 0.86);
  margin-top: 1.25rem;
  max-width: 64ch;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-top: 2rem;
  padding: 1.1rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(200, 164, 78, 0.22);
  border-radius: 14px;
  backdrop-filter: blur(8px);
}

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

.page-about .about-hero__stat dd {
  font-family: var(--font-data);
  font-size: clamp(1.2rem, 2.4vw, 1.6rem);
  font-weight: 700;
  color: var(--gold);
  margin: 0.2rem 0 0;
  line-height: 1.1;
}

.page-about .about-hero__stat dt {
  font-size: 0.78rem;
  color: rgba(245, 239, 224, 0.65);
  line-height: 1.4;
}

.page-about .about-hero__visual {
  margin: 0;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(200, 164, 78, 0.32);
  box-shadow: var(--shadow);
  position: relative;
}

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

.page-about .data-system {
  background: var(--cream);
  padding: 3.5rem 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .data-system__head {
  max-width: 780px;
  margin-bottom: 2.25rem;
}

.page-about .data-system__head h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--ink);
  margin: 0.4rem 0 0.6rem;
}

.page-about .data-system__head .section-subtitle {
  color: var(--slate);
  line-height: 1.75;
}

.page-about .data-system__grid {
  display: grid;
  gap: 1.25rem;
}

.page-about .data-system__card {
  background: var(--sand);
  border: 1px solid var(--about-line);
  border-left: 4px solid var(--gold);
  border-radius: 14px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  transition: border-color var(--transition), transform var(--transition);
}

.page-about .data-system__card:hover {
  border-color: var(--gold);
  transform: translateY(-2px);
}

.page-about .data-system__card--cards {
  border-left-color: var(--red);
}

.page-about .data-system__card--cards .data-system__code {
  background: var(--red);
  color: var(--cream);
}

.page-about .data-system__card--goals {
  border-left-color: var(--mid);
}

.page-about .data-system__code {
  align-self: flex-start;
  font-family: var(--font-data);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--deep);
  background: var(--gold);
  padding: 0.15rem 0.55rem;
  border-radius: 4px;
  letter-spacing: 0.06em;
}

.page-about .data-system__heading {
  font-size: 1.3rem;
  color: var(--ink);
  margin: 0;
  line-height: 1.4;
}

.page-about .data-system__desc {
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--ink);
  opacity: 0.85;
  margin: 0;
  flex: 1;
}

.page-about .data-system__meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin: 0.5rem 0 0;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--about-line);
}

.page-about .data-system__meta div {
  background: rgba(255, 255, 255, 0.5);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
}

.page-about .data-system__meta dt {
  font-size: 0.75rem;
  color: var(--slate);
}

.page-about .data-system__meta dd {
  font-family: var(--font-data);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--mid);
  margin: 0.15rem 0 0;
}

.page-about .data-system__visual {
  margin: 0;
  border-radius: 14px;
  overflow: hidden;
  position: relative;
  background: var(--mid);
}

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

.page-about .data-system__visual figcaption {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  padding: 2.5rem 1rem 0.75rem;
  background: linear-gradient(0deg, rgba(10, 22, 40, 0.88), transparent);
  color: var(--cream);
  font-size: 0.85rem;
}

.page-about .data-system__more {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.page-about .version-section {
  background:
    radial-gradient(circle at 88% 12%, rgba(200, 164, 78, 0.14) 0, transparent 34%),
    var(--deep);
  color: var(--cream);
  padding: 3.5rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.page-about .version-section__head .section-eyebrow {
  color: var(--gold);
}

.page-about .version-section__head h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--cream);
  margin: 0.4rem 0 0.6rem;
}

.page-about .version-section__head .section-subtitle {
  color: rgba(245, 239, 224, 0.7);
  line-height: 1.75;
}

.page-about .timeline {
  margin-top: 2.5rem;
}

.page-about .timeline__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 2.5rem;
}

.page-about .timeline__list::before {
  content: "";
  position: absolute;
  left: 0.75rem;
  top: 0.6rem;
  bottom: 0.6rem;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(to bottom, var(--gold) 0%, rgba(200, 164, 78, 0.2) 100%);
}

.page-about .timeline__item {
  position: relative;
  padding-bottom: 1.75rem;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -1.75rem;
  top: 0.6rem;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: var(--deep);
  border: 3px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(200, 164, 78, 0.12);
}

.page-about .timeline__badge {
  display: inline-block;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--deep);
  background: var(--gold);
  border-radius: 4px;
  padding: 0.15rem 0.55rem;
  letter-spacing: 0.08em;
  margin-bottom: 0.4rem;
}

.page-about .timeline__card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(200, 164, 78, 0.2);
  border-radius: 12px;
  padding: 1.15rem 1.2rem 1rem;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.page-about .timeline__card:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(200, 164, 78, 0.55);
  transform: translateX(4px);
}

.page-about .timeline__year {
  display: block;
  font-family: var(--font-data);
  font-size: 0.82rem;
  color: var(--gold);
  letter-spacing: 0.08em;
  margin-top: 0.35rem;
}

.page-about .timeline__name {
  font-size: 1.1rem;
  color: var(--cream);
  margin: 0.25rem 0 0.45rem;
  line-height: 1.4;
}

.page-about .timeline__desc {
  font-size: 0.9rem;
  line-height: 1.75;
  color: rgba(245, 239, 224, 0.75);
  margin: 0;
}

.page-about .version-section__image {
  margin: 2.25rem 0 0;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(200, 164, 78, 0.3);
}

.page-about .version-section__image img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .version-section__more {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.page-about .cap-section {
  background: var(--sand);
  padding: 3.5rem 0;
}

.page-about .cap-section__grid {
  display: grid;
  gap: 1.5rem;
  align-items: start;
}

.page-about .metrics-panel {
  background: var(--cream);
  border: 1px solid var(--about-line);
  border-radius: 18px;
  padding: 1.5rem;
}

.page-about .metrics-panel__head h2 {
  font-size: clamp(1.35rem, 2.6vw, 1.75rem);
  color: var(--ink);
  margin: 0.4rem 0 0.5rem;
}

.page-about .metrics-panel__head .section-subtitle {
  color: var(--slate);
  font-size: 0.92rem;
}

.page-about .metrics-panel__filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.25rem 0;
}

.page-about .metrics-panel__filter .filter-btn {
  border: 1px solid var(--mid);
  background: transparent;
  color: var(--mid);
  padding: 0.4rem 1.05rem;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all var(--transition);
}

.page-about .metrics-panel__filter .filter-btn:hover,
.page-about .metrics-panel__filter .filter-btn--active {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--deep);
}

.page-about .metrics-panel__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.page-about .metric-card {
  background: var(--sand);
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--gold);
  border-radius: 12px;
  padding: 1rem 0.9rem;
  min-height: 108px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.15rem;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.page-about .metric-card[data-category="update"] {
  border-left-color: var(--red);
}

.page-about .metric-card[data-category="scale"] {
  border-left-color: var(--mid);
}

.page-about .metric-card:hover {
  border-color: var(--gold);
  box-shadow: 0 4px 16px rgba(200, 164, 78, 0.14);
  transform: translateY(-2px);
}

.page-about .metric-card__main {
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
  flex-wrap: wrap;
}

.page-about .metric-card__value {
  font-family: var(--font-data);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--mid);
  line-height: 1.1;
}

.page-about .metric-card__unit {
  font-family: var(--font-data);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gold);
}

.page-about .metric-card__label {
  font-size: 0.8rem;
  color: var(--ink);
  opacity: 0.75;
  line-height: 1.45;
}

.page-about .compliance-panel {
  background: var(--deep);
  color: var(--cream);
  border-radius: 18px;
  padding: 1.75rem;
  position: sticky;
  top: 100px;
}

.page-about .compliance-panel__head .section-eyebrow {
  color: var(--gold);
}

.page-about .compliance-panel__head h2 {
  font-size: 1.5rem;
  color: var(--cream);
  margin: 0.4rem 0 0;
}

.page-about .compliance-panel__list {
  margin: 1.5rem 0 0;
}

.page-about .compliance-panel__row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.page-about .compliance-panel__row:last-child {
  border-bottom: none;
}

.page-about .compliance-panel__row dt {
  font-size: 0.85rem;
  color: rgba(245, 239, 224, 0.6);
  flex-shrink: 0;
  line-height: 1.5;
}

.page-about .compliance-panel__row dd {
  margin: 0;
  font-size: 0.9rem;
  color: var(--cream);
  text-align: right;
  line-height: 1.5;
  word-break: break-all;
}

.page-about .compliance-panel__note {
  margin-top: 1.25rem;
  padding: 0.9rem 1rem;
  border-left: 3px solid var(--gold);
  background: rgba(255, 255, 255, 0.04);
  border-radius: 0 8px 8px 0;
  font-size: 0.85rem;
  line-height: 1.65;
  color: rgba(245, 239, 224, 0.8);
}

.page-about .compliance-panel__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
}

.page-about .compliance-panel .btn--ghost {
  border-color: rgba(200, 164, 78, 0.45);
  color: var(--gold);
}

.page-about .compliance-panel .btn--ghost:hover {
  background: rgba(200, 164, 78, 0.12);
  border-color: var(--gold);
  color: var(--gold);
}

@media (min-width: 768px) {
  .page-about .metrics-panel {
    padding: 2rem;
  }

  .page-about .metrics-panel__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.9rem;
  }

  .page-about .compliance-panel {
    padding: 2rem;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding: 4rem 0;
  }

  .page-about .about-hero__inner {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3.5rem;
  }

  .page-about .data-system {
    padding: 5rem 0;
  }

  .page-about .version-section {
    padding: 5rem 0;
  }

  .page-about .cap-section {
    padding: 5rem 0;
  }

  .page-about .cap-section__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
  }

  .page-about .data-system__grid {
    grid-template-columns: 1.15fr 0.85fr 1fr;
    grid-template-rows: auto auto;
  }

  .page-about .data-system__card--ranking {
    grid-column: 1 / 3;
    grid-row: 1;
  }

  .page-about .data-system__card--cards {
    grid-column: 3;
    grid-row: 1;
  }

  .page-about .data-system__card--goals {
    grid-column: 1;
    grid-row: 2;
  }

  .page-about .data-system__visual {
    grid-column: 2 / 4;
    grid-row: 2;
    display: flex;
  }

  .page-about .data-system__visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    min-height: 260px;
  }
}