.page-about {
  --about-line: rgba(126, 147, 180, 0.24);
  --about-line-strong: rgba(126, 147, 180, 0.45);
  --about-body: rgba(233, 239, 247, 0.8);
  background: var(--ink-900);
  color: var(--paper);
  overflow-x: clip;
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 4vw, 40px) 0 clamp(34px, 6vw, 72px);
  border-bottom: 1px solid var(--about-line);
  background:
    radial-gradient(120% 90% at 8% 0%, rgba(29, 53, 87, 0.9) 0%, rgba(11, 23, 48, 0) 62%),
    linear-gradient(180deg, var(--ink-850), var(--ink-900));
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(22px, 4vw, 46px);
  margin-top: clamp(18px, 3vw, 30px);
}

.page-about .about-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(2.05rem, 6.4vw, 3.6rem);
  line-height: 1.18;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--about-body);
  max-width: 46em;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-hero__figure {
  margin: 0;
  align-self: start;
}

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

.page-about .about-stats {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .about-stats__item {
  background: var(--ink-850);
  padding: 16px 14px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-stats__num {
  font-size: clamp(1.5rem, 3.4vw, 2.05rem);
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
  letter-spacing: -0.02em;
}

.page-about .about-stats__label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-500);
}

/* ---------- Chapter skeleton ---------- */
.page-about .chapter {
  padding: clamp(36px, 6vw, 84px) 0;
  border-bottom: 1px solid rgba(126, 147, 180, 0.12);
}

.page-about .chapter__inner {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: clamp(12px, 2.6vw, 32px);
}

.page-about .chapter__rail {
  position: relative;
  display: flex;
  justify-content: center;
  padding-top: 3px;
}

.page-about .chapter__rail::before {
  content: "";
  position: absolute;
  top: 34px;
  bottom: -48px;
  left: 50%;
  width: 1px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, var(--about-line-strong), rgba(126, 147, 180, 0));
}

.page-about .chapter__num {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink-900);
  background: var(--celadon);
  clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 9px, 100% 100%, 0 100%);
}

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

.page-about .chapter__body h2 {
  margin: 10px 0 0;
  font-size: clamp(1.45rem, 3.6vw, 2.25rem);
  line-height: 1.26;
  font-weight: 900;
  color: var(--paper);
}

.page-about .about-text {
  margin: clamp(14px, 2.4vw, 22px) 0 0;
  max-width: 44em;
}

.page-about .about-text p {
  margin: 0 0 14px;
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.85;
  color: var(--about-body);
}

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

.page-about .about-text--lead {
  margin-top: clamp(14px, 2.4vw, 22px);
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.85;
  color: var(--about-body);
}

/* ---------- Team cards ---------- */
.page-about .team-cards {
  display: grid;
  gap: 14px;
  margin-top: clamp(20px, 3.4vw, 34px);
}

.page-about .team-card {
  position: relative;
  padding: 22px 18px 24px;
  background: linear-gradient(160deg, var(--ink-800), var(--ink-850));
  border: 1px solid var(--about-line);
  border-top: 2px solid var(--ink-700);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  transition: transform 0.28s ease, border-top-color 0.28s ease;
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  transform: translateY(-6px);
  border-top-color: var(--amber);
}

.page-about .team-card__kicker {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-500);
}

.page-about .team-card h3 {
  margin: 8px 0 0;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .team-card__desc {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-body);
}

.page-about .team-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
  opacity: 0.62;
  transition: opacity 0.28s ease;
}

.page-about .team-card:hover .team-card__tags,
.page-about .team-card:focus-within .team-card__tags {
  opacity: 1;
}

.page-about .chip {
  display: inline-block;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--celadon-lift);
  background: rgba(46, 127, 107, 0.18);
  border: 1px solid rgba(79, 183, 154, 0.32);
}

.page-about .about-figure {
  margin: clamp(24px, 4vw, 40px) 0 0;
}

.page-about .about-figure--wide {
  margin-top: clamp(18px, 3vw, 28px);
}

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

/* ---------- Cadence ---------- */
.page-about .cadence {
  display: grid;
  gap: 12px;
  margin-top: clamp(20px, 3.4vw, 32px);
}

.page-about .cadence__item {
  position: relative;
  padding: 22px 18px 24px;
  background: var(--ink-850);
  border: 1px solid var(--about-line);
  overflow: hidden;
}

.page-about .cadence__item::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--amber), rgba(227, 163, 59, 0));
}

.page-about .cadence__item:nth-child(2)::before {
  background: linear-gradient(90deg, var(--celadon), rgba(79, 183, 154, 0));
}

.page-about .cadence__item:nth-child(3)::before {
  background: linear-gradient(90deg, var(--ink-500), rgba(126, 147, 180, 0));
}

.page-about .cadence__period {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-about .cadence__title {
  margin: 8px 0 0;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .cadence__desc {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-body);
}

/* ---------- Timeline ---------- */
.page-about .tl {
  list-style: none;
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--celadon-deep), rgba(126, 147, 180, 0.3));
}

.page-about .tl__item {
  position: relative;
  padding-left: 44px;
  margin-bottom: 12px;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 21px;
  width: 9px;
  height: 9px;
  background: var(--ink-900);
  border: 1px solid var(--celadon);
  transform: rotate(45deg);
  z-index: 1;
}

.page-about .tl__item--key::before {
  left: 8px;
  top: 18px;
  width: 15px;
  height: 15px;
  background: var(--amber);
  border-color: var(--amber);
}

.page-about .tl__node {
  background: var(--ink-850);
  border: 1px solid var(--about-line);
  border-left: 2px solid var(--ink-700);
}

.page-about .tl__node--key {
  border-left-color: var(--amber);
  background: linear-gradient(100deg, rgba(227, 163, 59, 0.09), var(--ink-850) 62%);
}

.page-about .tl__node summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 14px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .tl__node summary:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: -2px;
}

.page-about .tl__ver {
  flex: 0 0 auto;
  min-width: 40px;
  font-size: 13px;
  font-weight: 700;
  color: var(--amber);
  letter-spacing: 0.04em;
}

.page-about .tl__name {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .tl__sign::before {
  content: "+";
  display: inline-block;
  width: 16px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--ink-500);
  transition: color 0.2s ease;
}

.page-about .tl__node[open] .tl__sign::before {
  content: "–";
  color: var(--amber);
}

.page-about .tl__desc {
  margin: 0;
  padding: 12px 14px 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-body);
  border-top: 1px dashed rgba(126, 147, 180, 0.22);
}

/* ---------- Eco ---------- */
.page-about .eco {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(20px, 3.4vw, 32px);
}

.page-about .eco__figure {
  background: var(--ink-850);
  border: 1px solid var(--about-line);
  padding: 16px;
}

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

.page-about .eco__body .about-text {
  margin-top: 0;
}

.page-about .eco__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .eco__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-body);
}

.page-about .eco__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background: var(--celadon);
}

.page-about .eco__list strong {
  color: var(--paper);
  font-weight: 700;
}

/* ---------- CTA ---------- */
.page-about .about-cta {
  padding: clamp(26px, 5vw, 52px) 0 clamp(36px, 6vw, 64px);
  background: linear-gradient(180deg, var(--ink-900), var(--ink-850));
}

.page-about .about-cta h2 {
  margin: 0;
  font-size: clamp(1.35rem, 3.2vw, 1.9rem);
  line-height: 1.3;
  font-weight: 900;
  color: var(--paper);
}

.page-about .about-cta__desc {
  margin: 14px 0 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--about-line);
}

/* ---------- Media queries ---------- */
@media (min-width: 620px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-stats__item {
    padding: 18px 16px 20px;
  }

  .page-about .tl__node summary {
    padding: 16px 18px;
  }

  .page-about .tl__desc {
    padding: 14px 18px 18px;
  }
}

@media (min-width: 780px) {
  .page-about .team-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
    gap: 18px;
  }

  .page-about .team-card:nth-child(2) {
    margin-top: 34px;
  }

  .page-about .team-card:nth-child(3) {
    margin-top: 68px;
  }

  .page-about .cadence {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .chapter__inner {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: clamp(20px, 3vw, 44px);
  }

  .page-about .chapter__rail::before {
    bottom: -56px;
  }

  .page-about .eco {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__text {
    padding-right: clamp(0px, 2vw, 28px);
  }

  .page-about .about-text,
  .page-about .about-text--lead {
    max-width: 40em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .team-card__tags,
  .page-about .tl__sign::before {
    transition: none;
  }

  .page-about .team-card:hover,
  .page-about .team-card:focus-within {
    transform: none;
  }
}