.page-about {
  --about-pad: clamp(1.1rem, 3vw, 1.8rem);
  --about-gap: clamp(2rem, 5vw, 3.6rem);
  background: var(--ink);
  color: var(--mist);
  font-family: var(--font-body);
  padding-bottom: clamp(2rem, 5vw, 3.6rem);
  overflow-x: clip;
}

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

.page-about .about-crumbs {
  padding-top: clamp(1rem, 2.5vw, 1.6rem);
}

/* ---------- hero ---------- */
.page-about .about-hero {
  position: relative;
  margin-top: clamp(1rem, 2.5vw, 1.6rem);
  padding: clamp(1.8rem, 4.5vw, 3rem) 0 clamp(2rem, 5vw, 3.4rem);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(115% 85% at 88% 0%, rgba(91, 200, 255, 0.16), transparent 58%),
    linear-gradient(168deg, var(--blue) 0%, var(--ink) 70%);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(36, 70, 59, 0.5) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(0deg, rgba(36, 70, 59, 0.32) 0 1px, transparent 1px 72px);
  opacity: 0.6;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.6rem);
}

.page-about .about-hero h1 {
  margin: 0.6rem 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.05rem, 6.4vw, 3.8rem);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--mist);
  max-width: 16ch;
}

.page-about .about-hero__lede {
  margin: clamp(0.9rem, 2.4vw, 1.3rem) 0 0;
  max-width: 54ch;
  font-size: clamp(0.95rem, 1.6vw, 1.05rem);
  line-height: 1.85;
  color: rgba(242, 247, 243, 0.82);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: clamp(1.2rem, 3vw, 1.8rem);
}

.page-about .about-hero__card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--about-pad);
  background: linear-gradient(180deg, rgba(11, 31, 51, 0.94), rgba(4, 16, 25, 0.94));
  box-shadow: 0 24px 48px -34px rgba(0, 0, 0, 0.95);
}

.page-about .about-hero__card-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--lime);
  text-transform: uppercase;
}

.page-about .about-facts {
  margin: 0.9rem 0 0;
  display: grid;
  gap: 0.7rem;
}

.page-about .about-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid rgba(36, 70, 59, 0.7);
}

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

.page-about .about-facts dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .about-facts dd {
  margin: 0;
  text-align: right;
}

.page-about .about-facts__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.25rem, 3.2vw, 1.6rem);
  line-height: 1;
  color: var(--lime);
}

.page-about .about-facts__unit {
  margin-left: 0.2rem;
  font-size: 0.78rem;
  color: var(--muted);
}

.page-about .about-facts__text {
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--mist);
  max-width: 15ch;
}

/* ---------- layout ---------- */
.page-about .about-layout {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.6rem);
  padding-block: clamp(2rem, 5vw, 3.4rem);
}

.page-about .about-index__title {
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 0.86rem;
  color: var(--muted);
  text-decoration: none;
  transition: color var(--dur) ease, border-color var(--dur) ease, background-color var(--dur) ease;
}

.page-about .about-index__no {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--lime);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--mist);
  border-color: var(--lime);
  background: rgba(200, 255, 61, 0.07);
}

/* ---------- section base ---------- */
.page-about .about-sec {
  scroll-margin-top: 6.5rem;
  padding-top: clamp(1.4rem, 3.5vw, 2rem);
}

.page-about .about-sec + .about-sec {
  margin-top: clamp(1.8rem, 4.5vw, 2.8rem);
  border-top: 1px solid var(--line);
}

.page-about .about-sec__no {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin: 0 0 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.page-about .about-sec__no::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--lime);
}

.page-about .about-sec__title {
  margin: 0 0 0.7rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.45rem, 3.6vw, 2.2rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .about-sec__lede {
  margin: 0 0 clamp(1.2rem, 3vw, 1.8rem);
  max-width: 62ch;
  font-size: 0.97rem;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- origin ---------- */
.page-about .about-origin {
  display: grid;
  gap: clamp(1.2rem, 3vw, 2rem);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-year {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 0.55rem;
  background: linear-gradient(180deg, rgba(11, 31, 51, 0.7), rgba(6, 26, 21, 0.7));
  transition: border-color var(--dur) ease;
}

.page-about .about-year[open] {
  border-color: rgba(200, 255, 61, 0.45);
}

.page-about .about-year__head {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  padding: 0.8rem 1rem;
  cursor: pointer;
  list-style: none;
}

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

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

.page-about .about-year__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  color: var(--lime);
}

.page-about .about-year__label {
  font-size: 0.96rem;
  color: var(--mist);
}

.page-about .about-year__head::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--muted);
}

.page-about .about-year[open] .about-year__head::after {
  content: "–";
  color: var(--lime);
}

.page-about .about-year__body {
  padding: 0 1rem 1rem;
}

.page-about .about-year__body p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- figures ---------- */
.page-about .about-figure {
  margin: 0;
}

.page-about .about-figure figcaption {
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-about .media-frame {
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

/* ---------- tabs ---------- */
.page-about .about-tabs {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(0.9rem, 2.4vw, 1.3rem);
  margin-bottom: clamp(1rem, 2.6vw, 1.4rem);
  background: rgba(11, 31, 51, 0.5);
}

.page-about .about-tabs .tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.95rem;
}

.page-about .about-tabs .tab {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.05em;
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: color var(--dur) ease, border-color var(--dur) ease, background-color var(--dur) ease;
}

.page-about .about-tabs .tab:hover {
  color: var(--mist);
  border-color: var(--sky);
}

.page-about .about-tabs .tab[aria-selected="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
  font-weight: 700;
}

.page-about .about-tabs .tab:focus-visible {
  outline: 2px solid var(--sky);
  outline-offset: 2px;
}

.page-about .tab-panel p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--muted);
  max-width: 62ch;
}

.page-about .tab-panel[hidden] {
  display: none;
}

/* ---------- flow ---------- */
.page-about .about-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 clamp(1.1rem, 3vw, 1.6rem);
}

.page-about .about-flow__step {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--mist);
  background: rgba(6, 26, 21, 0.7);
}

.page-about .about-flow__arrow {
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.page-about .about-flow__note {
  font-size: 0.78rem;
  color: var(--muted);
  padding-left: 0.3rem;
}

/* ---------- selection rules ---------- */
.page-about .about-rules {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-about .about-rules li {
  border: 1px solid var(--line);
  border-left: 2px solid var(--lime);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  background: rgba(6, 26, 21, 0.62);
}

.page-about .about-rules li:nth-child(2) {
  border-left-color: var(--gold);
}

.page-about .about-rules li:nth-child(3) {
  border-left-color: var(--sky);
}

.page-about .about-rules li:nth-child(4) {
  border-left-color: var(--magenta);
}

.page-about .about-rules__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--lime);
  margin-bottom: 0.35rem;
}

.page-about .about-rules li:nth-child(2) .about-rules__no {
  color: var(--gold);
}

.page-about .about-rules li:nth-child(3) .about-rules__no {
  color: var(--sky);
}

.page-about .about-rules li:nth-child(4) .about-rules__no {
  color: var(--magenta);
}

.page-about .about-rules h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.08rem;
  letter-spacing: 0.01em;
  color: var(--mist);
}

.page-about .about-rules p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- ecosystem ---------- */
.page-about .about-eco {
  display: grid;
  gap: clamp(1rem, 3vw, 1.5rem);
}

.page-about .about-award {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1rem, 2.6vw, 1.5rem);
  background: linear-gradient(150deg, rgba(244, 201, 93, 0.12), rgba(11, 31, 51, 0.9) 60%);
}

.page-about .about-award__tag {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--gold);
  text-transform: uppercase;
}

.page-about .about-award .card__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.1rem, 2.6vw, 1.4rem);
  line-height: 1.3;
  color: var(--mist);
}

.page-about .about-award .card__body p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- people ---------- */
.page-about .about-numbers {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: clamp(1rem, 2.8vw, 1.5rem);
}

.page-about .about-numbers__item {
  padding: clamp(1rem, 3vw, 1.5rem);
  background: linear-gradient(180deg, rgba(11, 31, 51, 0.92), rgba(6, 26, 21, 0.92));
}

.page-about .about-numbers__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.9rem, 6vw, 3.2rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .about-numbers__item:nth-child(2) .about-numbers__num {
  color: var(--gold);
}

.page-about .about-numbers__item:nth-child(3) .about-numbers__num {
  color: var(--sky);
}

.page-about .about-numbers__label {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-people__text {
  margin: 0;
  max-width: 64ch;
  font-size: 0.95rem;
  line-height: 1.9;
  color: rgba(242, 247, 243, 0.78);
}

/* ---------- screen ---------- */
.page-about .about-scenes {
  list-style: none;
  margin: 0 0 clamp(1.2rem, 3vw, 1.8rem);
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-about .about-scenes li {
  border-top: 1px solid var(--line);
  padding-top: 0.85rem;
}

.page-about .about-scenes__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--magenta);
  margin-bottom: 0.35rem;
}

.page-about .about-scenes h3 {
  margin: 0 0 0.3rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.06rem;
  color: var(--mist);
}

.page-about .about-scenes p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.page-about .about-links .btn {
  text-decoration: none;
}

/* ---------- cta ---------- */
.page-about .about-cta {
  margin-top: clamp(1.8rem, 4.5vw, 3rem);
  padding: clamp(1.5rem, 4vw, 2.6rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(90% 120% at 8% 0%, rgba(200, 255, 61, 0.14), transparent 60%),
    linear-gradient(120deg, rgba(11, 31, 51, 0.95), rgba(4, 16, 25, 0.95));
}

.page-about .about-cta__eyebrow {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--lime);
}

.page-about .about-cta__title {
  margin: 0 0 0.7rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.35rem, 3.6vw, 2rem);
  line-height: 1.2;
  color: var(--mist);
}

.page-about .about-cta__text {
  margin: 0 0 clamp(1rem, 2.6vw, 1.4rem);
  max-width: 64ch;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.page-about .about-cta__actions .btn {
  text-decoration: none;
}

/* ---------- responsive ---------- */
@media (min-width: 700px) {
  .page-about .about-numbers {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-rules {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.75fr);
    align-items: end;
  }

  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .about-eco {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: stretch;
  }

  .page-about .about-scenes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.2rem;
  }
}

@media (min-width: 960px) {
  .page-about .about-layout {
    grid-template-columns: 188px minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.6rem);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 6.5rem;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 0;
  }

  .page-about .about-index__link {
    border: 0;
    border-left: 1px solid var(--line);
    border-radius: 0;
    padding: 0.45rem 0 0.45rem 0.8rem;
    font-size: 0.88rem;
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    background: transparent;
    border-left-color: var(--lime);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .about-tabs .tab,
  .page-about .about-year {
    transition: none;
  }
}