.page-about {
  --ab-rail: 118px;
  --ab-panel-bg: linear-gradient(180deg, rgba(11, 37, 64, .94), rgba(6, 26, 46, .98));
  --ab-cut: 18px;
  position: relative;
  overflow-x: clip;
}

/* ---------- breadcrumb row ---------- */
.page-about .ab-crumb-row {
  padding-top: clamp(14px, 2vw, 22px);
}

/* ---------- shared panel ---------- */
.page-about .ab-panel {
  background: var(--ab-panel-bg);
  border: 1px solid var(--line);
  clip-path: polygon(
    var(--ab-cut) 0,
    100% 0,
    100% calc(100% - var(--ab-cut)),
    calc(100% - var(--ab-cut)) 100%,
    0 100%,
    0 var(--ab-cut)
  );
  padding: clamp(18px, 2.6vw, 28px);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .ab-panel:hover {
  border-color: var(--line-strong);
}

/* ---------- hero ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(30px, 5vw, 58px) 0 clamp(28px, 4vw, 46px);
  background:
    radial-gradient(120% 92% at 84% 6%, rgba(35, 230, 208, .16), transparent 56%),
    radial-gradient(88% 70% at 4% 2%, rgba(255, 106, 43, .14), transparent 62%);
  overflow: hidden;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  left: -12%;
  top: 62%;
  width: 124%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-strong) 45%, rgba(255, 106, 43, .38) 78%, transparent);
  transform: skewX(-18deg);
  pointer-events: none;
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 44px);
  align-items: end;
  position: relative;
  z-index: 1;
}

.page-about .ab-hero__title {
  margin: 12px 0 0;
  font-size: clamp(34px, 6.6vw, 64px);
  line-height: 1.06;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--cloud);
}

.page-about .ab-hero__lead {
  margin: 20px 0 0;
  max-width: 48ch;
  color: var(--mist);
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.75;
}

.page-about .ab-hero__lead--sub {
  margin-top: 12px;
  color: var(--cloud);
  font-size: clamp(15px, 1.3vw, 17px);
}

.page-about .ab-hero__lead--sub::before {
  content: "";
  display: inline-block;
  width: 26px;
  height: 2px;
  margin-right: 10px;
  vertical-align: middle;
  background: var(--lava);
}

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

.page-about .ab-hero__figure {
  margin: 0;
}

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

.page-about .ab-hero__figure .img-frame__caption {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .04em;
}

/* ---------- stat strip ---------- */
.page-about .ab-stats {
  list-style: none;
  margin: clamp(30px, 4.4vw, 48px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .ab-stats__item {
  background: var(--ink-950);
  padding: clamp(16px, 2.2vw, 24px) clamp(14px, 2vw, 22px);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .ab-stats__num {
  font-family: var(--mono);
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--lava);
}

.page-about .ab-stats__unit {
  font-size: .5em;
  margin-left: 4px;
  color: var(--lava-soft);
}

.page-about .ab-stats__label {
  color: var(--mist);
  font-size: 13px;
  line-height: 1.5;
}

/* ---------- work section ---------- */
.page-about .ab-work__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .ab-work__head .section__lead {
  max-width: 40ch;
}

.page-about .ab-work__list {
  display: grid;
  gap: clamp(16px, 2.4vw, 22px);
}

.page-about .ab-item__k {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .ab-item__t {
  margin: 10px 0 0;
  font-size: clamp(19px, 2.3vw, 23px);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--cloud);
}

.page-about .ab-item__p {
  margin: 12px 0 0;
  color: var(--mist);
  line-height: 1.75;
  font-size: 15.5px;
}

/* ---------- timeline ---------- */
.page-about .ab-track {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(18px, 2.8vw, 28px);
  position: relative;
}

.page-about .ab-track__item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-about .ab-track__year {
  font-family: var(--mono);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--lava);
}

.page-about .ab-track__year::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 2px;
  margin-right: 10px;
  vertical-align: middle;
  background: linear-gradient(90deg, var(--lava), rgba(255, 106, 43, 0));
}

.page-about .ab-track__panel {
  padding: clamp(18px, 2.4vw, 26px);
}

.page-about .ab-track__title {
  margin: 0;
  font-size: clamp(18px, 2.1vw, 22px);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--cloud);
}

.page-about .ab-track__text {
  margin: 10px 0 0;
  color: var(--mist);
  line-height: 1.75;
  font-size: 15.5px;
  max-width: 62ch;
}

.page-about .ab-fold {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

.page-about .ab-fold summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--cyan);
}

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

.page-about .ab-fold summary::before {
  content: "+";
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1;
  color: var(--lava);
  transition: transform var(--dur) var(--ease);
}

.page-about .ab-fold[open] summary::before {
  content: "\2212";
}

.page-about .ab-fold p {
  margin: 10px 0 0;
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.75;
  max-width: 60ch;
}

/* ---------- network ---------- */
.page-about .ab-network__figure {
  margin: clamp(26px, 3.6vw, 40px) 0 clamp(20px, 2.8vw, 30px);
}

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

.page-about .ab-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .ab-facts__item {
  background: var(--ink-900);
  padding: 15px clamp(16px, 2vw, 22px);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 20px;
}

.page-about .ab-facts__k {
  color: var(--mist);
  font-size: 14px;
}

.page-about .ab-facts__v {
  font-family: var(--mono);
  font-size: 16px;
  letter-spacing: .01em;
  color: var(--cloud);
}

/* ---------- team ---------- */
.page-about .ab-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 44px);
}

.page-about .ab-team__aside .section__lead {
  max-width: 42ch;
}

.page-about .ab-team__figure {
  margin: clamp(20px, 3vw, 30px) 0 0;
}

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

.page-about .ab-team__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2.2vw, 20px);
}

.page-about .ab-member__idx {
  margin: 0;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--gold);
}

.page-about .ab-member__t {
  margin: 10px 0 0;
  font-size: clamp(18px, 2vw, 21px);
  font-weight: 700;
  color: var(--cloud);
  letter-spacing: -.01em;
}

.page-about .ab-member__p {
  margin: 10px 0 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.75;
}

/* ---------- assurance ---------- */
.page-about .ab-assure__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2.4vw, 24px);
  margin-top: clamp(26px, 3.6vw, 40px);
}

.page-about .ab-assure__item {
  display: flex;
  flex-direction: column;
  position: relative;
}

.page-about .ab-assure__k {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--lava);
}

.page-about .ab-assure__t {
  margin: 12px 0 0;
  font-size: clamp(18px, 2.1vw, 22px);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--cloud);
}

.page-about .ab-assure__p {
  margin: 12px 0 0;
  color: var(--mist);
  font-size: 15.5px;
  line-height: 1.75;
}

/* ---------- closing CTA ---------- */
.page-about .ab-next {
  padding-bottom: clamp(44px, 6vw, 72px);
}

.page-about .ab-cta {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 32px);
  padding: clamp(26px, 4vw, 46px);
  background:
    linear-gradient(135deg, rgba(255, 106, 43, .18), rgba(35, 230, 208, .1) 58%, rgba(4, 18, 31, .92)),
    var(--ink-800);
  border: 1px solid var(--line-strong);
  clip-path: polygon(
    var(--ab-cut) 0,
    100% 0,
    100% calc(100% - var(--ab-cut)),
    calc(100% - var(--ab-cut)) 100%,
    0 100%,
    0 var(--ab-cut)
  );
}

.page-about .ab-cta__title {
  margin: 0;
  font-size: clamp(24px, 3.4vw, 36px);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--cloud);
}

.page-about .ab-cta__lead {
  margin: 14px 0 0;
  max-width: 52ch;
  color: var(--mist);
  line-height: 1.75;
  font-size: 15.5px;
}

.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

/* ---------- responsive ---------- */
@media (min-width: 700px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .ab-assure__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .ab-track__item {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr);
    column-gap: 34px;
  }

  .page-about .ab-track__year {
    font-size: 22px;
    text-align: right;
    padding-top: 18px;
  }

  .page-about .ab-track__year::before {
    display: none;
  }

  .page-about .ab-track__item::before {
    content: "";
    position: absolute;
    left: calc(var(--ab-rail) + 22px);
    top: 26px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--lava);
    box-shadow: 0 0 0 4px rgba(255, 106, 43, .18);
  }

  .page-about .ab-track__item::after {
    content: "";
    position: absolute;
    left: calc(var(--ab-rail) + 26px);
    top: 46px;
    bottom: calc(-1 * clamp(18px, 2.8vw, 28px));
    width: 1px;
    background: linear-gradient(180deg, var(--line-strong), rgba(35, 230, 208, 0));
  }

  .page-about .ab-track__item:last-child::after {
    display: none;
  }
}

@media (min-width: 1000px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .ab-work__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .ab-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .ab-cta {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }

  .page-about .ab-cta__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .page-about .ab-cta__actions .btn {
    justify-content: center;
  }
}

@media (min-width: 1180px) {
  .page-about .ab-track__panel {
    padding: 28px 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-panel,
  .page-about .ab-fold summary::before {
    transition: none;
  }

  .page-about .ab-panel:hover {
    transform: none;
  }
}