.page-about {
  --ab-pad: clamp(18px, 4vw, 44px);
  --ab-rail: clamp(26px, 3vw, 44px);
  --ab-band-pad: clamp(48px, 8vw, 96px);
  background: var(--gj-ink);
  color: var(--gj-body);
  font-family: var(--gj-font-sans);
  overflow-x: hidden;
  padding-bottom: 0;
}

.page-about .ab-shell {
  width: 100%;
  max-width: var(--gj-shell);
  margin-inline: auto;
  padding-inline: var(--ab-pad);
}

.page-about .ab-link {
  color: var(--gj-signal);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 230, 210, 0.35);
  transition: border-color 0.2s var(--gj-ease), color 0.2s var(--gj-ease);
}

.page-about .ab-link:hover,
.page-about .ab-link:focus-visible {
  color: var(--gj-paper);
  border-bottom-color: var(--gj-signal);
  outline: none;
}

.page-about .ab-note {
  display: block;
  margin: 0 0 14px;
  font-family: var(--gj-font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--gj-signal);
  text-transform: uppercase;
}

/* ---------- hero ---------- */

.page-about .ab-hero {
  padding-block: clamp(28px, 5vw, 56px) 0;
  background:
    radial-gradient(120% 90% at 12% 0%, rgba(46, 230, 210, 0.11), transparent 62%),
    linear-gradient(180deg, var(--gj-ink) 0%, var(--gj-ink-2) 100%);
}

.page-about .ab-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--gj-steel);
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .ab-crumbs a {
  color: var(--gj-steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--gj-ease), border-color 0.2s var(--gj-ease);
}

.page-about .ab-crumbs a:hover,
.page-about .ab-crumbs a:focus-visible {
  color: var(--gj-signal);
  border-bottom-color: var(--gj-signal);
  outline: none;
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: end;
}

.page-about .ab-hero__media {
  margin: 0;
  position: relative;
  overflow: hidden;
  border-radius: 2px;
  border: 1px solid var(--gj-line);
  background: var(--gj-ink-3);
}

.page-about .ab-hero__media::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gj-signal), transparent 82%);
}

.page-about .ab-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .ab-h1 {
  margin: 0 0 18px;
  color: var(--gj-paper);
  line-height: 1.12;
  letter-spacing: -0.01em;
}

.page-about .ab-lead {
  max-width: 34em;
  color: var(--gj-body);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .ab-stats {
  list-style: none;
  margin: clamp(32px, 5vw, 52px) 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--gj-line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 16px;
}

.page-about .ab-stats__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 12px;
  border-left: 1px solid var(--gj-line);
}

.page-about .ab-stats__n {
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--gj-lime);
}

.page-about .ab-stats__l {
  font-size: 13px;
  color: var(--gj-steel);
  letter-spacing: 0.02em;
}

/* ---------- band 骨架 ---------- */

.page-about .ab-band {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding-block: var(--ab-band-pad);
}

.page-about .ab-band__body > .gj-h2 {
  margin: 0 0 16px;
  color: var(--gj-paper);
}

.page-about .ab-band__body > .gj-p {
  max-width: 38em;
  margin: 0 0 16px;
}

/* ---------- 02 起点 ---------- */

.page-about .ab-origin {
  background: var(--gj-ink-2);
  border-top: 1px solid var(--gj-line);
}

.page-about .ab-timeline {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  position: relative;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 18px;
  width: 1px;
  background: linear-gradient(180deg, var(--gj-signal), rgba(46, 230, 210, 0.12));
}

.page-about .ab-timeline__item {
  position: relative;
  padding: 0 0 26px 26px;
}

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

.page-about .ab-timeline__dot {
  position: absolute;
  left: 0;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 2px;
  background: var(--gj-lime);
  box-shadow: 0 0 0 3px rgba(216, 255, 62, 0.14);
  transition: box-shadow 0.18s var(--gj-ease), transform 0.18s var(--gj-ease);
}

.page-about .ab-timeline__year {
  display: block;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--gj-signal);
  margin-bottom: 6px;
}

.page-about .ab-timeline__item .gj-h3 {
  margin: 0 0 6px;
  color: var(--gj-paper);
  font-size: 17px;
}

.page-about .ab-timeline__tip {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--gj-steel);
  max-width: 30em;
  padding: 8px 12px;
  border-left: 2px solid var(--gj-line);
  background: rgba(36, 52, 73, 0.32);
  transition: border-color 0.18s var(--gj-ease), color 0.18s var(--gj-ease), background 0.18s var(--gj-ease);
}

.page-about .ab-timeline__item:hover .ab-timeline__tip,
.page-about .ab-timeline__item:focus-within .ab-timeline__tip {
  border-left-color: var(--gj-signal);
  color: var(--gj-paper);
  background: rgba(46, 230, 210, 0.08);
}

.page-about .ab-timeline__item:hover .ab-timeline__dot {
  transform: scale(1.2);
  box-shadow: 0 0 0 5px rgba(216, 255, 62, 0.16);
}

/* ---------- 03 团队 ---------- */

.page-about .ab-crew {
  background: var(--gj-ink);
}

.page-about .ab-crew__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 28px;
}

.page-about .ab-crew__item {
  border-radius: 2px;
  padding: 18px 18px 20px;
  border: 1px solid var(--gj-line);
  background: var(--gj-ink-2);
  transition: border-color 0.18s var(--gj-ease), background 0.18s var(--gj-ease);
}

.page-about .ab-crew__item--a {
  border-left: 3px solid var(--gj-turf);
  background: linear-gradient(180deg, rgba(31, 111, 92, 0.28), rgba(17, 30, 51, 0.9) 70%);
}

.page-about .ab-crew__item--b {
  border-left: 3px solid var(--gj-violet);
  background: linear-gradient(180deg, rgba(59, 46, 110, 0.34), rgba(17, 30, 51, 0.9) 70%);
}

.page-about .ab-crew__item--c {
  border-left: 3px solid var(--gj-wine);
  background: linear-gradient(180deg, rgba(122, 43, 62, 0.34), rgba(17, 30, 51, 0.9) 70%);
}

.page-about .ab-crew__item--d {
  border-left: 3px solid var(--gj-signal);
  background: linear-gradient(180deg, rgba(46, 230, 210, 0.14), rgba(17, 30, 51, 0.9) 70%);
}

.page-about .ab-crew__item:hover,
.page-about .ab-crew__item[open] {
  border-color: var(--gj-signal);
}

.page-about .ab-crew__sum {
  display: flex;
  align-items: baseline;
  gap: 10px;
  cursor: pointer;
  list-style: none;
  outline: none;
}

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

.page-about .ab-crew__sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--gj-font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--gj-signal);
  transition: transform 0.2s var(--gj-ease);
}

.page-about .ab-crew__item[open] .ab-crew__sum::after {
  transform: rotate(45deg);
}

.page-about .ab-crew__sum:focus-visible {
  outline: 2px solid var(--gj-signal);
  outline-offset: 4px;
}

.page-about .ab-crew__idx {
  font-size: 12px;
  color: var(--gj-steel);
  letter-spacing: 0.1em;
}

.page-about .ab-crew__name {
  font-size: 19px;
  font-weight: 700;
  color: var(--gj-paper);
  letter-spacing: 0.01em;
}

.page-about .ab-crew__role {
  margin: 12px 0 12px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--gj-body);
}

.page-about .ab-crew__list {
  margin: 0;
  padding: 0 0 0 16px;
  list-style: none;
}

.page-about .ab-crew__list li {
  position: relative;
  font-size: 14px;
  line-height: 1.65;
  color: var(--gj-steel);
  padding: 5px 0;
}

.page-about .ab-crew__list li::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 13px;
  width: 5px;
  height: 5px;
  border-radius: 1px;
  background: var(--gj-signal);
  opacity: 0.7;
}

.page-about .ab-crew__out {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--gj-line);
  font-family: var(--gj-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gj-lime);
}

/* ---------- 04 链路 ---------- */

.page-about .ab-flow {
  background: var(--gj-ink-3);
  border-top: 1px solid var(--gj-line);
  border-bottom: 1px solid var(--gj-line);
}

.page-about .ab-flow__steps {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  counter-reset: none;
}

.page-about .ab-flow__step {
  padding: 16px 16px 18px;
  background: rgba(10, 20, 32, 0.6);
  border-top: 2px solid var(--gj-line);
  transition: border-color 0.18s var(--gj-ease), background 0.18s var(--gj-ease);
}

.page-about .ab-flow__step:hover {
  border-top-color: var(--gj-signal);
  background: rgba(10, 20, 32, 0.9);
}

.page-about .ab-flow__n {
  display: inline-block;
  font-size: 22px;
  font-weight: 700;
  color: var(--gj-lime);
  margin-bottom: 8px;
}

.page-about .ab-flow__step .gj-h3 {
  margin: 0 0 6px;
  font-size: 16px;
  color: var(--gj-paper);
}

.page-about .ab-flow__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--gj-steel);
}

.page-about .ab-flow__media {
  margin: 30px 0 0;
  border: 1px solid var(--gj-line);
  border-radius: 2px;
  overflow: hidden;
  background: var(--gj-ink-2);
}

.page-about .ab-flow__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .ab-flow__cap {
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--gj-steel);
  border-top: 1px solid var(--gj-line);
}

/* ---------- 05 城市 ---------- */

.page-about .ab-cities {
  background: var(--gj-ink);
}

.page-about .ab-cities__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-top: 26px;
}

.page-about .ab-cities__map {
  padding: 20px 16px 18px;
  border: 1px solid var(--gj-line);
  border-radius: 2px;
  background:
    linear-gradient(180deg, rgba(31, 111, 92, 0.16), rgba(10, 20, 32, 0.4) 65%),
    var(--gj-ink-2);
}

.page-about .ab-dots {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 8px;
}

.page-about .ab-dots li {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1 / 1;
}

.page-about .ab-dot {
  position: relative;
  display: block;
  width: calc(7px + var(--n, 1) * 2.1px);
  height: calc(7px + var(--n, 1) * 2.1px);
  background: var(--gj-signal);
  border-radius: 2px;
  opacity: 0.5;
  outline: none;
  transition: opacity 0.18s var(--gj-ease), transform 0.18s var(--gj-ease), background 0.18s var(--gj-ease);
}

.page-about .ab-dot:hover,
.page-about .ab-dot:focus-visible {
  opacity: 1;
  transform: scale(1.3);
  background: var(--gj-lime);
}

.page-about .ab-dot::after {
  content: attr(data-label);
  position: absolute;
  left: 50%;
  bottom: calc(100% + 9px);
  transform: translateX(-50%);
  white-space: nowrap;
  padding: 4px 9px;
  font-family: var(--gj-font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--gj-paper);
  background: var(--gj-ink-3);
  border: 1px solid var(--gj-signal);
  border-radius: 2px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.16s var(--gj-ease);
  z-index: 4;
}

.page-about .ab-dot:hover::after,
.page-about .ab-dot:focus-visible::after {
  opacity: 1;
}

.page-about .ab-cities__legend {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--gj-line);
  font-size: 13px;
  line-height: 1.6;
  color: var(--gj-steel);
}

.page-about .ab-cities__side .gj-p {
  max-width: 38em;
  margin: 0 0 16px;
}

.page-about .ab-cities__media {
  margin: 0 0 16px;
  border-radius: 2px;
  overflow: hidden;
  border: 1px solid var(--gj-line);
}

.page-about .ab-cities__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

/* ---------- 06 协作 ---------- */

.page-about .ab-partners {
  background: linear-gradient(180deg, var(--gj-wine) 0%, #4A1B27 100%);
  color: var(--gj-paper);
}

.page-about .ab-partners .ab-note {
  color: var(--gj-lime);
}

.page-about .ab-partners .ab-band__body > .gj-p {
  color: #E7D2D7;
}

.page-about .ab-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 26px;
}

.page-about .ab-partners__card {
  padding: 18px 18px 20px;
  border-radius: 10px;
  border: 1px solid rgba(234, 242, 246, 0.16);
  background: rgba(10, 20, 32, 0.42);
  transition: border-color 0.18s var(--gj-ease), background 0.18s var(--gj-ease);
}

.page-about .ab-partners__card:hover {
  border-color: var(--gj-signal);
  background: rgba(10, 20, 32, 0.62);
}

.page-about .ab-partners__card--turf {
  border-top: 3px solid var(--gj-turf);
}

.page-about .ab-partners__card--violet {
  border-top: 3px solid var(--gj-violet);
}

.page-about .ab-partners__card--wine {
  border-top: 3px solid var(--gj-lime);
}

.page-about .ab-partners__card .gj-h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--gj-paper);
}

.page-about .ab-partners__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: #E3CBD1;
}

/* ---------- 07 下一步 ---------- */

.page-about .ab-join {
  background: var(--gj-ink-2);
}

.page-about .ab-join__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 26px;
}

.page-about .ab-join__card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px 22px;
  text-decoration: none;
  border-radius: 2px;
  border: 1px solid var(--gj-line);
  background: rgba(10, 20, 32, 0.55);
  transition: border-color 0.18s var(--gj-ease), background 0.18s var(--gj-ease), transform 0.18s var(--gj-ease);
}

.page-about .ab-join__card:hover,
.page-about .ab-join__card:focus-visible {
  border-color: var(--gj-signal);
  background: rgba(46, 230, 210, 0.08);
  transform: translateY(-2px);
  outline: none;
}

.page-about .ab-join__card--signal {
  border-color: rgba(46, 230, 210, 0.42);
  background: linear-gradient(180deg, rgba(46, 230, 210, 0.13), rgba(10, 20, 32, 0.6) 72%);
}

.page-about .ab-join__kicker {
  font-family: var(--gj-font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gj-steel);
}

.page-about .ab-join__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--gj-paper);
  line-height: 1.4;
}

.page-about .ab-join__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--gj-body);
}

.page-about .ab-join__go {
  margin-top: auto;
  padding-top: 10px;
  font-family: var(--gj-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gj-track);
}

.page-about .ab-join__card:hover .ab-join__go,
.page-about .ab-join__card:focus-visible .ab-join__go {
  color: var(--gj-lime);
}

.page-about .ab-contact {
  margin-top: 30px;
  padding: 20px 18px 22px;
  border-top: 2px solid var(--gj-signal);
  background: rgba(10, 20, 32, 0.55);
}

.page-about .ab-contact .gj-h3 {
  margin: 0 0 14px;
  font-size: 17px;
  color: var(--gj-paper);
}

.page-about .ab-contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-about .ab-contact__list li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--gj-body);
  overflow-wrap: anywhere;
}

.page-about .ab-contact__k {
  font-family: var(--gj-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gj-steel);
}

.page-about .ab-contact__back {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--gj-line);
  font-size: 14px;
  color: var(--gj-steel);
}

/* ---------- 响应式 ---------- */

@media (min-width: 600px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-crew__grid,
  .page-about .ab-partners__grid,
  .page-about .ab-join__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .ab-flow__steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .ab-dots {
    grid-template-columns: repeat(8, minmax(0, 1fr));
  }

  .page-about .ab-contact__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 24px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 40px;
    align-items: stretch;
  }

  .page-about .ab-hero__media {
    order: -1;
    margin-left: calc(-1 * var(--ab-pad));
  }

  .page-about .ab-hero__media img {
    aspect-ratio: auto;
    height: 100%;
    min-height: 420px;
  }

  .page-about .ab-hero__copy {
    padding-bottom: 6px;
  }

  .page-about .ab-hero__stats,
  .page-about .ab-stats {
    margin-top: 48px;
  }

  .page-about .ab-band {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr);
    gap: 34px;
  }

  .page-about .ab-note {
    writing-mode: vertical-rl;
    position: sticky;
    top: 118px;
    align-self: start;
    margin: 0;
    padding-left: 2px;
    border-left: 1px solid rgba(46, 230, 210, 0.4);
    padding-block: 4px 14px;
    line-height: 1;
  }

  .page-about .ab-note--inline {
    writing-mode: horizontal-tb;
    position: static;
    border-left: 0;
    padding: 0;
    margin: 0 0 14px;
  }

  .page-about .ab-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 18px;
    margin-top: 40px;
  }

  .page-about .ab-timeline::before {
    left: 0;
    right: 0;
    top: 5px;
    bottom: auto;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, var(--gj-signal), rgba(46, 230, 210, 0.16));
  }

  .page-about .ab-timeline__item {
    padding: 30px 14px 0 0;
  }

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

  .page-about .ab-timeline__dot {
    left: 0;
    top: 0;
    width: 11px;
    height: 11px;
  }

  .page-about .ab-timeline__tip {
    padding: 10px 12px;
    min-height: 96px;
  }

  .page-about .ab-crew__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
    align-items: start;
    margin-top: 34px;
  }

  .page-about .ab-crew__item--b {
    margin-top: 20px;
  }

  .page-about .ab-crew__item--c {
    margin-top: 40px;
  }

  .page-about .ab-crew__item--d {
    margin-top: 60px;
  }

  .page-about .ab-flow__steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .ab-flow__media {
    margin-top: 36px;
  }

  .page-about .ab-cities__layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .ab-cities__map {
    padding: 26px 24px 22px;
  }

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

  .page-about .ab-join__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    align-items: stretch;
  }

  .page-about .ab-contact {
    padding: 26px 26px 28px;
  }
}

@media (min-width: 1200px) {
  .page-about .ab-hero__media img {
    min-height: 480px;
  }

  .page-about .ab-crew__item {
    padding: 20px 20px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-dot,
  .page-about .ab-join__card,
  .page-about .ab-crew__sum::after,
  .page-about .ab-timeline__dot,
  .page-about .ab-timeline__tip {
    transition: none;
  }
}

.page-about {
  --n: 1rem;
}