.page-about {
  --about-line: var(--line);
  --about-gap: 24px;
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  background-color: var(--court-900);
  background-image:
    linear-gradient(rgba(247, 249, 246, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(247, 249, 246, 0.06) 1px, transparent 1px);
  background-size: 56px 56px;
  color: var(--net);
  padding: 36px 0 56px;
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: var(--fluo);
}

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

.page-about .about-hero .eyebrow {
  color: var(--fluo);
  letter-spacing: 0.18em;
  font-size: 12px;
  margin: 0;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(30px, 5.2vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--net);
}

.page-about .about-hero .lead {
  margin: 20px 0 0;
  max-width: 56ch;
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.78;
  color: rgba(247, 249, 246, 0.82);
}

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

.page-about .hero-stats {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: rgba(247, 249, 246, 0.2);
  border: 1px solid rgba(247, 249, 246, 0.2);
}

.page-about .hero-stats li {
  background: var(--court-900);
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .hero-stats__num {
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 700;
  color: var(--fluo);
  line-height: 1;
}

.page-about .hero-stats__label {
  font-size: 13px;
  color: rgba(247, 249, 246, 0.7);
}

/* ---------- Index board ---------- */
.page-about .about-hero__map {
  display: flex;
  align-items: center;
}

.page-about .index-board {
  width: 100%;
  border: 1px solid rgba(247, 249, 246, 0.22);
  background: rgba(10, 12, 10, 0.28);
  padding: 18px;
}

.page-about .index-board__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--fluo);
}

.page-about .index-board__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 6px;
  margin-top: 14px;
}

.page-about .index-board__cell {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1 / 0.84;
  border: 1px solid rgba(247, 249, 246, 0.18);
  font-size: 12px;
  color: rgba(247, 249, 246, 0.58);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .index-board__cell:nth-child(3),
.page-about .index-board__cell:nth-child(7),
.page-about .index-board__cell:nth-child(11) {
  background: rgba(215, 255, 62, 0.14);
  border-color: rgba(215, 255, 62, 0.5);
  color: var(--fluo);
}

.page-about .index-board:hover .index-board__cell:nth-child(5) {
  background: rgba(79, 168, 224, 0.18);
  border-color: var(--sky);
  color: #fff;
}

.page-about .index-board__foot {
  margin: 14px 0 0;
  font-size: 10px;
  letter-spacing: 0.14em;
  color: rgba(247, 249, 246, 0.42);
}

/* ---------- Body layout ---------- */
.page-about .about-body {
  padding: 44px 0 0;
}

.page-about .about-toc {
  border-top: 2px solid var(--court-900);
  padding-top: 12px;
  margin-bottom: 36px;
}

.page-about .about-toc__title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--graphite);
}

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-toc__link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 6px 10px;
  font-size: 14px;
  color: var(--graphite);
  text-decoration: none;
  border-left: 2px solid transparent;
  background: var(--court-100);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-toc__link .mono {
  font-size: 11px;
  color: var(--court-600);
}

.page-about .about-toc__link:hover {
  border-left-color: var(--court-600);
  background: var(--fluo);
  color: var(--court-900);
}

.page-about .about-toc__link:hover .mono {
  color: var(--court-900);
}

/* ---------- Sections ---------- */
.page-about .about-sec {
  padding: 44px 0;
}

.page-about .about-sec + .about-sec {
  border-top: 1px solid var(--about-line);
}

.page-about .about-sec__head {
  margin-bottom: 22px;
}

.page-about .about-sec__idx {
  display: block;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--court-600);
  margin-bottom: 10px;
}

.page-about .about-sec__title {
  margin: 0;
  max-width: 24ch;
  font-size: clamp(23px, 3.4vw, 34px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  font-weight: 900;
  color: var(--ink);
}

.page-about .about-sec__body {
  max-width: 68ch;
}

.page-about .about-sec__body p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--graphite);
}

.page-about .about-sec__body p:last-child {
  margin-bottom: 0;
}

/* ---------- Fact row ---------- */
.page-about .fact-row {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .fact-row li {
  background: var(--net);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .fact-row__k {
  font-size: 22px;
  font-weight: 700;
  color: var(--court-900);
  line-height: 1;
}

.page-about .fact-row__v {
  font-size: 13px;
  color: var(--graphite);
}

/* ---------- Layer list ---------- */
.page-about .layer-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .layer {
  background: var(--net);
  padding: 20px 18px;
}

.page-about .layer__no {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--court-600);
}

.page-about .layer__title {
  margin: 8px 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .layer__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--graphite);
}

.page-about .about-figure {
  margin: 28px 0 0;
  max-width: 720px;
}

/* ---------- Category grid ---------- */
.page-about .cat-grid {
  margin-top: 24px;
  display: grid;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .cat {
  background: var(--net);
  padding: 0;
  transition: background-color var(--dur) var(--ease);
}

.page-about .cat[open] {
  background: var(--court-100);
}

.page-about .cat__sum {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

.page-about .cat__sum::-webkit-details-marker {
  display: none;
}

.page-about .cat__sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--mono);
  font-size: 17px;
  line-height: 1;
  color: var(--court-600);
  transition: transform var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .cat__sum:hover .cat__name {
  color: var(--court-600);
}

.page-about .cat__sum:hover::after {
  color: var(--court-900);
}

.page-about .cat[open] .cat__sum::after {
  transform: rotate(45deg);
  color: var(--court-900);
}

.page-about .cat__idx {
  font-size: 12px;
  font-weight: 700;
  color: var(--court-600);
}

.page-about .cat__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  transition: color var(--dur) var(--ease);
}

.page-about .cat__count {
  font-size: 11px;
  color: var(--graphite);
  letter-spacing: 0.06em;
}

.page-about .cat__subs {
  list-style: none;
  margin: 0;
  padding: 0 16px 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .cat__subs li {
  font-size: 13px;
  padding: 4px 9px;
  background: var(--net);
  border: 1px solid var(--court-600);
  color: var(--court-900);
}

/* ---------- Team table ---------- */
.page-about .team-table {
  width: 100%;
  margin-top: 26px;
  border-collapse: collapse;
  font-size: 15px;
}

.page-about .team-table__cap {
  text-align: left;
  padding: 0 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--graphite);
}

.page-about .team-table th,
.page-about .team-table td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--about-line);
}

.page-about .team-table th {
  font-weight: 500;
  color: var(--graphite);
  width: 58%;
}

.page-about .team-table td {
  font-family: var(--mono);
  font-weight: 700;
  color: var(--court-900);
}

.page-about .team-table tr:last-child th,
.page-about .team-table tr:last-child td {
  border-bottom: 0;
}

/* ---------- Timeline ---------- */
.page-about .tl {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  position: relative;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--about-line);
}

.page-about .tl__item {
  position: relative;
  padding-left: 46px;
  padding-bottom: 34px;
}

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

.page-about .tl__year {
  position: absolute;
  left: 0;
  top: 0;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--court-900);
  color: var(--fluo);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .tl__item:hover .tl__year {
  background: var(--fluo);
  color: var(--court-900);
}

.page-about .tl__title {
  margin: 4px 0 8px;
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
  transition: color var(--dur) var(--ease);
}

.page-about .tl__item:hover .tl__title {
  color: var(--court-600);
}

.page-about .tl__text {
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--graphite);
}

.page-about .tl__meta {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--court-600);
}

.page-about .tl__item--current .tl__title {
  color: var(--court-900);
}

.page-about .tl__flag {
  display: inline-block;
  margin-top: 10px;
  padding: 3px 9px;
  background: var(--fluo);
  color: var(--court-900);
  font-size: 11px;
  letter-spacing: 0.12em;
}

/* ---------- Ecosystem ---------- */
.page-about .eco-stats {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .eco-stats li {
  background: var(--court-900);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .eco-stats__num {
  font-size: clamp(24px, 3vw, 30px);
  font-weight: 700;
  color: var(--fluo);
  line-height: 1;
}

.page-about .eco-stats__label {
  font-size: 13px;
  color: rgba(247, 249, 246, 0.75);
}

.page-about .eco-sub {
  margin: 32px 0 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .honors {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  border-top: 1px solid var(--about-line);
}

.page-about .honors__item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 0 12px 14px;
  border-bottom: 1px solid var(--about-line);
  position: relative;
  transition: background-color var(--dur) var(--ease);
}

.page-about .honors__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  width: 6px;
  height: 6px;
  background: var(--fluo);
  border: 1px solid var(--court-600);
}

.page-about .honors__item:hover {
  background: var(--court-100);
}

.page-about .honors__year {
  font-size: 13px;
  font-weight: 700;
  color: var(--court-600);
  min-width: 46px;
}

.page-about .honors__text {
  font-size: 15px;
  color: var(--graphite);
}

/* ---------- CTA ---------- */
.page-about .about-cta {
  margin-top: 8px;
  padding: 48px 0 56px;
  background:
    linear-gradient(rgba(247, 249, 246, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(247, 249, 246, 0.05) 1px, transparent 1px),
    var(--court-900);
  background-size: 48px 48px, 48px 48px, auto;
}

.page-about .about-cta__box {
  display: grid;
  gap: 24px;
  border-top: 3px solid var(--fluo);
  padding-top: 26px;
}

.page-about .about-cta__copy h2 {
  margin: 0 0 12px;
  font-size: clamp(22px, 3.2vw, 30px);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--net);
}

.page-about .about-cta__copy p {
  margin: 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(247, 249, 246, 0.78);
}

.page-about .about-cta__side {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.page-about .about-cta__mail {
  flex-basis: 100%;
  margin: 4px 0 0;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--sky);
  word-break: break-all;
}

/* ---------- Responsive ---------- */
@media (min-width: 640px) {
  .page-about .cat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .layer-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-cta__box {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
    gap: 40px;
  }

  .page-about .about-cta__side {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 52px 0 72px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 56px;
    align-items: center;
  }

  .page-about .about-sec {
    padding: 52px 0;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    display: grid;
    grid-template-columns: 196px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
    padding-top: 56px;
  }

  .page-about .about-toc {
    position: sticky;
    top: 96px;
    margin-bottom: 0;
  }

  .page-about .about-toc__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 4px;
  }

  .page-about .about-toc__link {
    width: 100%;
  }

  .page-about .tl::before {
    left: 74px;
  }

  .page-about .tl__item {
    display: grid;
    grid-template-columns: 60px minmax(0, 1fr);
    gap: 28px;
    padding-left: 0;
    padding-bottom: 40px;
  }

  .page-about .tl__year {
    position: static;
    width: auto;
    height: auto;
    background: transparent;
    color: var(--court-600);
    justify-content: flex-end;
    align-items: flex-start;
    font-size: 14px;
    letter-spacing: 0.1em;
    padding-top: 4px;
  }

  .page-about .tl__item:hover .tl__year {
    background: transparent;
    color: var(--court-900);
  }
}

@media (min-width: 1100px) {
  .page-about .cat-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 519px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .hero-stats li {
    padding: 12px 8px;
  }

  .page-about .hero-stats__label {
    font-size: 12px;
  }

  .page-about .honors__item {
    flex-direction: column;
    gap: 4px;
  }

  .page-about .honors__item::before {
    top: 18px;
  }
}

.page-about .about-hero .btn--ghost {
  border-color: rgba(247, 249, 246, 0.5);
  color: var(--net);
}

.page-about .about-hero .btn--ghost:hover {
  border-color: var(--fluo);
  color: var(--fluo);
}

.page-about .about-cta .btn--ghost {
  border-color: rgba(247, 249, 246, 0.5);
  color: var(--net);
}

.page-about .about-cta .btn--ghost:hover {
  border-color: var(--fluo);
  color: var(--fluo);
}

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