.page-about {
  --about-line: rgba(143, 160, 200, .28);
  --about-line-hot: rgba(53, 224, 208, .55);
  --about-panel-soft: rgba(19, 28, 66, .72);
  --about-ink: var(--c-mist);
}

/* ---------- 首屏拼贴 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(28px, 5vw, 56px) 0 clamp(26px, 4vw, 44px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: var(--gap-4);
  grid-template-columns: 1fr;
}

.page-about .about-hero__lead h1 {
  font-family: var(--font-display);
  font-size: clamp(30px, 7.4vw, 64px);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--c-snow);
  margin: 10px 0 18px;
  max-width: 15ch;
}

.page-about .about-hero__lead .lede {
  color: var(--c-snow);
  opacity: .86;
  max-width: 46ch;
}

.page-about .about-hero__chip {
  align-self: start;
  padding: 18px 20px;
  border: 2px solid var(--c-cyan);
  border-radius: var(--r-cut);
  background: linear-gradient(150deg, rgba(53, 224, 208, .12), rgba(19, 28, 66, .9));
  box-shadow: var(--shadow-hard);
  transform: rotate(-1.5deg);
}

.page-about .chip__label {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--c-cyan);
  margin-bottom: 6px;
}

.page-about .chip__value {
  font-family: var(--font-mono);
  font-size: 40px;
  line-height: 1;
  color: var(--c-snow);
}

.page-about .chip__note {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--about-ink);
}

.page-about .about-hero__stats {
  display: grid;
  gap: var(--gap-2);
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  margin: 4px 0 0;
  padding-top: var(--gap-3);
  border-top: 2px solid var(--about-line);
}

.page-about .stat {
  padding-left: 12px;
  border-left: 3px solid var(--c-coral);
}

.page-about .stat__k {
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1.1;
  color: var(--c-cyan);
}

.page-about .stat__v {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--about-ink);
}

.page-about .about-hero__ticker {
  margin-top: var(--gap-4);
  overflow: hidden;
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
  padding: 12px 0;
}

.page-about .ticker__track {
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-mist);
}

/* ---------- 通用图形 ---------- */
.page-about .about-figure {
  margin: 0 0 var(--gap-4);
}

.page-about .about-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 2px solid rgba(53, 224, 208, .35);
  border-radius: var(--r-cut);
  background: var(--c-night);
}

.page-about .about-figure__cap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-ink);
  border-left: 2px solid var(--c-gold);
  padding-left: 10px;
}

.page-about .about-note {
  margin: var(--gap-4) 0 0;
  padding: 16px 18px;
  border-left: 4px solid var(--c-cyan);
  background: var(--about-panel-soft);
  border-radius: 0 var(--r-cut) var(--r-cut) 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-snow);
  opacity: .92;
}

.page-about .about-note--coral {
  border-left-color: var(--c-coral);
}

/* ---------- 时间线 ---------- */
.page-about .about-line__head {
  display: grid;
  gap: var(--gap-3);
  grid-template-columns: 1fr;
  margin-bottom: var(--gap-4);
}

.page-about .tl-jump {
  padding: 16px 18px;
  border: 2px dashed rgba(143, 160, 200, .4);
  border-radius: var(--r-cut);
  background: rgba(6, 10, 31, .6);
}

.page-about .tl-jump__title {
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--c-gold);
  margin-bottom: 10px;
}

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

.page-about .tl-jump__link {
  display: inline-block;
  padding: 5px 10px;
  font-size: 12px;
  color: var(--c-cyan);
  border: 1px solid rgba(53, 224, 208, .42);
  border-radius: 999px;
  text-decoration: none;
  transition: background-color .18s ease, color .18s ease;
}

.page-about .tl-jump__link:hover,
.page-about .tl-jump__link:focus-visible {
  background: var(--c-cyan);
  color: var(--c-space);
}

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

.page-about .tl__item {
  position: relative;
  padding: 0 0 var(--gap-4) 52px;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 22px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--about-line-hot), var(--about-line));
}

.page-about .tl__item::after {
  content: "";
  position: absolute;
  left: 7px;
  top: 14px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--c-cyan);
  box-shadow: 0 0 0 4px rgba(53, 224, 208, .16), 0 0 14px rgba(53, 224, 208, .5);
}

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

.page-about .tl__item:last-child::before {
  display: none;
}

.page-about .tl__year {
  font-family: var(--font-mono);
  font-size: 20px;
  letter-spacing: .04em;
  color: var(--c-gold);
  margin-bottom: 6px;
}

.page-about .tl__body h3 {
  font-family: var(--font-display);
  font-size: clamp(18px, 3.4vw, 24px);
  line-height: 1.3;
  color: var(--c-snow);
  margin: 0 0 8px;
  letter-spacing: -.01em;
}

.page-about .tl__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-ink);
  max-width: 60ch;
}

/* ---------- 团队 ---------- */
.page-about .team {
  display: grid;
  gap: var(--gap-4);
  grid-template-columns: 1fr;
}

.page-about .team__visual {
  display: grid;
  gap: var(--gap-3);
  justify-items: center;
}

.page-about .team__ring {
  position: relative;
  width: min(240px, 66vw);
  aspect-ratio: 1 / 1;
}

.page-about .team__ring-bar {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(from -90deg,
      var(--c-cyan) 0 47.6%,
      var(--c-space) 47.6% 49.6%,
      var(--c-coral) 49.6% 79.8%,
      var(--c-space) 79.8% 81.8%,
      var(--c-gold) 81.8% 99.4%,
      var(--c-space) 99.4% 100%);
  -webkit-mask: radial-gradient(circle at 50% 50%, transparent 0 56%, #000 56.5%);
  mask: radial-gradient(circle at 50% 50%, transparent 0 56%, #000 56.5%);
}

.page-about .team__core {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
}

.page-about .team__core-num {
  font-family: var(--font-mono);
  font-size: 40px;
  line-height: 1;
  color: var(--c-snow);
}

.page-about .team__core-lab {
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--c-mist);
}

.page-about .team__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
  color: var(--about-ink);
}

.page-about .team__legend-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.page-about .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.page-about .dot--cyan { background: var(--c-cyan); }
.page-about .dot--coral { background: var(--c-coral); }
.page-about .dot--gold { background: var(--c-gold); }

.page-about .about-figure--team {
  margin: var(--gap-3) 0 0;
  width: 100%;
}

.page-about .role {
  border: 2px solid rgba(143, 160, 200, .3);
  border-radius: var(--r-cut);
  background: var(--about-panel-soft);
  margin-bottom: var(--gap-2);
  overflow: hidden;
  transition: border-color .2s ease, box-shadow .2s ease;
}

.page-about .role[open] {
  border-color: rgba(53, 224, 208, .55);
  box-shadow: var(--shadow-hard);
}

.page-about .role__sum {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 17px;
  color: var(--c-snow);
}

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

.page-about .role__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-coral);
}

.page-about .role__body {
  padding: 0 16px 16px;
}

.page-about .role__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-ink);
}

/* ---------- 索引体系 ---------- */
.page-about .idx-slabs {
  display: grid;
  gap: var(--gap-3);
  grid-template-columns: 1fr;
}

.page-about .idx-slab {
  position: relative;
  padding: 20px 20px 22px;
  border-radius: var(--r-cut);
  border: 2px solid rgba(143, 160, 200, .26);
  background: linear-gradient(160deg, rgba(19, 28, 66, .95), rgba(6, 10, 31, .9));
}

.page-about .idx-slab::after {
  content: "";
  position: absolute;
  top: 0;
  left: 20px;
  width: 54px;
  height: 4px;
  border-radius: 0 0 4px 4px;
}

.page-about .idx-slab--a::after { background: var(--c-cyan); }
.page-about .idx-slab--b::after { background: var(--c-coral); }
.page-about .idx-slab--c::after { background: var(--c-gold); }

.page-about .idx-slab__num {
  font-family: var(--font-mono);
  font-size: 38px;
  line-height: 1;
  color: var(--c-snow);
  opacity: .9;
}

.page-about .idx-slab__t {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  color: var(--c-snow);
  letter-spacing: -.01em;
}

.page-about .idx-slab__d {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-ink);
}

.page-about .idx-rules {
  display: grid;
  gap: var(--gap-3);
  grid-template-columns: 1fr;
  margin-top: var(--gap-4);
}

.page-about .idx-rule {
  padding: 14px 0 14px 16px;
  border-left: 3px solid var(--c-cyan);
  background: linear-gradient(90deg, rgba(53, 224, 208, .08), transparent 70%);
}

.page-about .idx-rule__k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--c-cyan);
  margin-bottom: 6px;
}

.page-about .idx-rule__v {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-snow);
  opacity: .86;
}

/* ---------- 发布节奏 ---------- */
.page-about .cadence {
  border: 2px solid rgba(255, 107, 74, .4);
  border-radius: var(--r-cut);
  padding: clamp(18px, 3vw, 30px);
  background: linear-gradient(140deg, rgba(255, 107, 74, .09), rgba(19, 28, 66, .82) 55%);
}

.page-about .cadence__bar {
  display: grid;
  gap: var(--gap-3);
  grid-template-columns: 1fr;
}

.page-about .cadence__slot {
  padding: 16px 18px;
  border-radius: calc(var(--r-cut) - 4px);
  background: rgba(6, 10, 31, .72);
  border: 1px solid rgba(143, 160, 200, .24);
}

.page-about .cadence__slot--week {
  border-left: 4px solid var(--c-cyan);
}

.page-about .cadence__slot--month {
  border-left: 4px solid var(--c-coral);
}

.page-about .cadence__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-gold);
  margin-bottom: 8px;
}

.page-about .cadence__txt {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-snow);
  opacity: .88;
}

.page-about .cadence__foot {
  margin: var(--gap-3) 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-ink);
}

.page-about .cadence__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: var(--gap-3) 0 0;
}

/* ---------- 合作生态 ---------- */
.page-about .partner-grid {
  display: grid;
  gap: var(--gap-4);
  grid-template-columns: 1fr;
}

.page-about .about-figure--partner {
  margin: 0;
}

.page-about .partner-side {
  display: grid;
  gap: var(--gap-3);
}

.page-about .partner-map {
  width: 100%;
  max-width: 560px;
  height: auto;
  margin: 0 auto;
  display: block;
}

.page-about .pm-wires line {
  stroke: url(#wire);
  stroke-width: 2;
}

.page-about .pm-core {
  fill: rgba(19, 28, 66, .95);
  stroke: var(--c-cyan);
  stroke-width: 3;
}

.page-about .pm-core-t {
  fill: var(--c-snow);
  font-family: var(--font-display);
  font-size: 22px;
}

.page-about .pm-core-s {
  fill: var(--c-mist);
  font-family: var(--font-mono);
  font-size: 14px;
}

.page-about .pm-node circle {
  fill: var(--c-gold);
  stroke: var(--c-space);
  stroke-width: 2;
}

.page-about .pm-node text {
  fill: var(--c-snow);
  font-size: 20px;
  font-family: var(--font-body);
}

.page-about .partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .partner-list li {
  padding: 14px 16px;
  border-radius: var(--r-cut);
  background: rgba(14, 42, 42, .72);
  border: 1px solid rgba(53, 224, 208, .28);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--c-snow);
  opacity: .9;
}

.page-about .partner-list__k {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-cyan);
  margin-bottom: 4px;
}

.page-about .partner-proof {
  display: grid;
  gap: var(--gap-3);
  grid-template-columns: 1fr;
  margin-top: var(--gap-4);
  padding-top: var(--gap-4);
  border-top: 2px solid var(--about-line);
}

.page-about .proof {
  padding-left: 14px;
  border-left: 3px solid var(--c-gold);
}

.page-about .proof__num {
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  color: var(--c-snow);
  margin-bottom: 8px;
}

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

.page-about .partner-cta {
  margin: var(--gap-4) 0 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-snow);
  opacity: .9;
}

/* ---------- 本地文化 ---------- */
.page-about .culture-strip__list {
  list-style: none;
  margin: 0;
  padding: 0 0 12px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(220px, 78vw);
  gap: var(--gap-2);
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .culture-item {
  scroll-snap-align: start;
  padding: 16px 16px 18px;
  border: 2px solid rgba(53, 224, 208, .3);
  border-radius: var(--r-cut);
  background: linear-gradient(170deg, rgba(14, 42, 42, .9), rgba(6, 10, 31, .85));
}

.page-about .culture-item__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--c-cyan);
  margin-bottom: 10px;
}

.page-about .culture-item__t {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  color: var(--c-snow);
}

.page-about .culture-item__d {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-ink);
}

.page-about .culture-strip__foot {
  margin: var(--gap-2) 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-ink);
}

/* ---------- 收尾 ---------- */
.page-about .about-coda {
  padding: clamp(72px, 13vw, 170px) 0 clamp(60px, 10vw, 130px);
  background:
    radial-gradient(circle at 20% 30%, rgba(53, 224, 208, .12), transparent 55%),
    radial-gradient(circle at 80% 70%, rgba(255, 107, 74, .1), transparent 50%);
}

.page-about .coda__line {
  font-family: var(--font-display);
  font-size: clamp(24px, 5.4vw, 46px);
  line-height: 1.22;
  letter-spacing: -.02em;
  color: var(--c-snow);
  margin: 0 0 18px;
  max-width: 22ch;
}

.page-about .coda__sub {
  margin: 0 0 var(--gap-3);
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-ink);
  max-width: 52ch;
}

.page-about .coda__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(220px, .85fr);
    align-items: start;
  }

  .page-about .about-hero__lead {
    grid-row: 1 / 3;
  }

  .page-about .about-hero__stats {
    grid-column: 1 / -1;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--gap-4);
  }

  .page-about .about-line__head {
    grid-template-columns: minmax(0, 1fr) minmax(200px, 260px);
    align-items: start;
  }

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

  .page-about .idx-slab--b {
    transform: translateY(22px);
  }

  .page-about .idx-slab--c {
    grid-column: 1 / -1;
  }

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

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

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

  .page-about .tl__item {
    padding-left: 68px;
  }

  .page-about .tl__item::before {
    left: 17px;
  }

  .page-about .tl__item::after {
    left: 11px;
  }

  .page-about .tl__year {
    font-size: 22px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 6fr) minmax(220px, 2fr) minmax(0, 4fr);
    gap: var(--gap-4) var(--gap-4);
    align-items: start;
  }

  .page-about .about-hero__lead {
    grid-column: 1 / 3;
    grid-row: 1 / 2;
  }

  .page-about .about-hero__chip {
    grid-column: 3 / 4;
    grid-row: 1 / 2;
    justify-self: end;
    max-width: 300px;
    margin-top: 34px;
  }

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

  .page-about .about-line__head {
    grid-template-columns: minmax(0, 6fr) minmax(200px, 2.4fr);
    gap: var(--gap-4);
  }

  .page-about .tl {
    padding-left: 12px;
  }

  .page-about .tl__item {
    padding-left: 88px;
    padding-bottom: clamp(46px, 5.4vw, 76px);
  }

  .page-about .tl__item::before {
    left: 21px;
  }

  .page-about .tl__item::after {
    left: 15px;
    width: 16px;
    height: 16px;
  }

  .page-about .tl__year {
    position: absolute;
    left: 0;
    top: 12px;
    font-size: 19px;
    letter-spacing: .02em;
  }

  .page-about .tl__body h3 {
    font-size: 24px;
  }

  .page-about .team {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: var(--gap-4);
    align-items: start;
  }

  .page-about .team__visual {
    justify-items: start;
  }

  .page-about .team__ring {
    width: min(280px, 30vw);
  }

  .page-about .idx-slabs {
    grid-template-columns: 3fr 3fr 4fr;
    align-items: start;
  }

  .page-about .idx-slab--c {
    grid-column: auto;
    transform: translateY(44px);
  }

  .page-about .partner-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 6fr);
    align-items: start;
    gap: var(--gap-4);
  }

  .page-about .about-figure--partner {
    position: sticky;
    top: 90px;
  }

  .page-about .culture-strip__list {
    grid-auto-columns: minmax(240px, 1fr);
    grid-auto-flow: column;
    padding-bottom: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__chip {
    transform: none;
  }

  .page-about .idx-slab--b,
  .page-about .idx-slab--c {
    transform: none;
  }

  .page-about .tl-jump__link,
  .page-about .role {
    transition: none;
  }
}