.page-about {
  --ab-gap: clamp(20px, 4vw, 40px);
  --ab-panel: rgba(18, 46, 38, 0.72);
  --ab-panel-deep: rgba(7, 19, 15, 0.92);
}

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

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  display: grid;
  gap: var(--ab-gap);
  padding: 26px 0 42px;
  border-bottom: 1px solid var(--jb-line);
}

.page-about .ab-hero__title {
  font-family: var(--jb-font-head);
  font-size: clamp(30px, 8.2vw, 56px);
  line-height: 1.13;
  letter-spacing: -0.02em;
  color: var(--jb-white);
  margin: 0.28em 0 0.5em;
  max-width: 18ch;
}

.page-about .ab-hero__lede {
  max-width: 52ch;
  color: var(--jb-body);
}

.page-about .ab-score {
  display: grid;
  gap: 0;
  padding: 6px 18px 14px;
  border: 1px solid var(--jb-line);
  border-radius: var(--jb-radius);
  background:
    linear-gradient(160deg, rgba(46, 255, 181, 0.06), transparent 45%),
    linear-gradient(160deg, var(--jb-board), var(--jb-ink-deep));
  box-shadow: 0 16px 0 -12px rgba(0, 0, 0, 0.65), inset 0 0 0 1px rgba(46, 255, 181, 0.05);
}

.page-about .ab-score__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px dashed rgba(30, 74, 60, 0.85);
}

.page-about .ab-score__row:last-of-type {
  border-bottom: 0;
}

.page-about .ab-score .jb-stat__value {
  font-family: var(--jb-font-mono);
  font-size: clamp(26px, 7vw, 34px);
  line-height: 1;
  color: var(--jb-gold);
}

.page-about .ab-score .jb-stat__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--jb-body);
  text-align: right;
  max-width: 20ch;
}

.page-about .ab-score__note {
  margin: 4px 0 8px;
  padding-top: 10px;
  border-top: 1px dashed rgba(30, 74, 60, 0.6);
  color: var(--jb-body);
  opacity: 0.75;
}

/* ---------- 时间线 ---------- */
.page-about .ab-timeline .jb-section__head {
  margin-bottom: 22px;
}

.page-about .ab-timeline__figure {
  margin: 0 0 22px;
}

.page-about .ab-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.page-about .ab-empty {
  margin: 0 0 16px;
  color: var(--jb-brick);
}

.page-about .ab-empty[hidden] {
  display: none;
}

.page-about .ab-track {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .ab-track::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 13px;
  width: 2px;
  background: linear-gradient(180deg, var(--jb-neon), var(--jb-gold) 62%, var(--jb-line));
  opacity: 0.5;
}

.page-about .ab-track__item {
  position: relative;
  padding-left: 32px;
  margin-bottom: 14px;
}

.page-about .ab-track__item[hidden] {
  display: none;
}

.page-about .ab-track__item::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 24px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--jb-ink);
  border: 2px solid var(--jb-neon);
  z-index: 1;
}

.page-about .ab-node {
  border: 1px solid var(--jb-line);
  border-radius: var(--jb-radius);
  background: var(--ab-panel);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-about .ab-node[open] {
  border-color: rgba(46, 255, 181, 0.45);
  box-shadow: inset 3px 0 0 var(--jb-neon);
  background: linear-gradient(120deg, rgba(46, 255, 181, 0.07), transparent 40%), var(--ab-panel);
}

.page-about .ab-node > summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .ab-node__year {
  font-family: var(--jb-font-mono);
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--jb-gold);
}

.page-about .ab-node__ver {
  font-family: var(--jb-font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--jb-neon);
  border: 1px solid rgba(46, 255, 181, 0.42);
  border-radius: 2px;
  padding: 1px 6px;
}

.page-about .ab-node__title {
  flex: 1 1 100%;
  font-family: var(--jb-font-head);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--jb-white);
}

.page-about .ab-node__body {
  padding: 2px 16px 18px;
  border-top: 1px dashed rgba(30, 74, 60, 0.8);
  margin-top: 2px;
}

.page-about .ab-node__body p {
  margin: 12px 0 12px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--jb-body);
}

.page-about .ab-node__body .jb-tag {
  margin-right: 6px;
}

/* ---------- 团队 ---------- */
.page-about .ab-team__figure {
  margin: 0 0 22px;
}

.page-about .ab-fold {
  display: grid;
  gap: 14px;
}

.page-about .ab-fold__panel {
  position: relative;
  padding: 20px 20px 22px;
  border: 1px solid var(--jb-line);
  border-radius: var(--jb-radius);
  background: linear-gradient(150deg, rgba(18, 46, 38, 0.9), var(--ab-panel-deep));
  overflow: hidden;
}

.page-about .ab-fold__panel::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 20px 20px 0;
  border-color: transparent rgba(46, 255, 181, 0.28) transparent transparent;
}

.page-about .ab-fold__num {
  display: inline-block;
  font-family: var(--jb-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--jb-neon);
  margin-bottom: 10px;
}

.page-about .ab-fold__panel .jb-h3 {
  margin: 0 0 8px;
  color: var(--jb-white);
  font-size: 18px;
}

.page-about .ab-fold__panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--jb-body);
}

/* ---------- 数据能力 ---------- */
.page-about .ab-data {
  display: grid;
  gap: var(--ab-gap);
  align-items: start;
}

.page-about .ab-data__main .jb-h2 {
  margin-bottom: 12px;
}

.page-about .ab-data__main .jb-prose {
  margin-bottom: 20px;
}

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

.page-about .ab-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .ab-metric {
  padding: 15px 14px 16px;
  border: 1px solid var(--jb-line);
  border-top: 2px solid var(--jb-gold);
  border-radius: var(--jb-radius);
  background: var(--ab-panel);
}

.page-about .ab-metric__num {
  display: block;
  font-family: var(--jb-font-mono);
  font-size: clamp(24px, 6.4vw, 34px);
  line-height: 1.08;
  color: var(--jb-gold);
}

.page-about .ab-metric__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--jb-body);
}

.page-about .ab-data__main .jb-note {
  margin-top: 14px;
  color: var(--jb-body);
  opacity: 0.78;
}

/* ---------- 合作生态 ---------- */
.page-about .ab-plates {
  display: grid;
  gap: 14px;
  margin-bottom: 20px;
}

.page-about .ab-plate {
  padding: 20px;
  border: 1px solid var(--jb-line);
  border-left: 3px solid var(--jb-gold);
  border-radius: var(--jb-radius);
  background: linear-gradient(120deg, rgba(18, 46, 38, 0.92), var(--ab-panel-deep));
}

.page-about .ab-plate__k {
  display: block;
  font-family: var(--jb-font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--jb-gold);
  margin-bottom: 8px;
}

.page-about .ab-plate .jb-h3 {
  margin: 0 0 8px;
  color: var(--jb-white);
  font-size: 18px;
}

.page-about .ab-plate p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--jb-body);
}

.page-about .ab-awards {
  display: grid;
  gap: 12px;
}

.page-about .ab-award {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 16px;
  border: 1px dashed var(--jb-line);
  border-radius: var(--jb-radius);
  background: rgba(7, 19, 15, 0.5);
}

.page-about .ab-award__mark {
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-top: 5px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, var(--jb-gold-pulse), var(--jb-gold) 65%, rgba(245, 196, 81, 0.2));
  box-shadow: 0 0 0 4px rgba(245, 196, 81, 0.12);
}

.page-about .ab-award .jb-h3 {
  margin: 8px 0 6px;
  color: var(--jb-white);
  font-size: 17px;
}

.page-about .ab-award p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--jb-body);
}

/* ---------- 收束 ---------- */
.page-about .ab-cta {
  margin: var(--ab-gap) 0 40px;
  padding: clamp(22px, 5vw, 42px);
  border: 1px solid var(--jb-line);
  border-radius: 6px;
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(46, 255, 181, 0.14), transparent 55%),
    linear-gradient(160deg, rgba(18, 46, 38, 0.95), var(--ab-panel-deep));
}

.page-about .ab-cta .jb-h2 {
  margin: 0 0 10px;
  color: var(--jb-white);
}

.page-about .ab-cta .jb-lede {
  max-width: 56ch;
  color: var(--jb-body);
}

.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.page-about .ab-cta__note {
  margin: 18px 0 0;
  color: var(--jb-body);
  opacity: 0.8;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .ab-hero {
    padding: 40px 0 56px;
  }

  .page-about .ab-node__title {
    flex: 1 1 auto;
  }

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

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

@media (min-width: 960px) {
  .page-about .ab-hero {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
    align-items: end;
  }

  .page-about .ab-score {
    margin-bottom: 6px;
  }

  .page-about .ab-data {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(28px, 5vw, 56px);
  }

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

  .page-about .ab-fold__panel:nth-child(2) {
    margin-top: 26px;
  }

  .page-about .ab-fold__panel:nth-child(3) {
    margin-top: 52px;
  }

  .page-about .ab-track::before {
    left: 20px;
  }

  .page-about .ab-track__item {
    padding-left: 44px;
  }

  .page-about .ab-track__item::before {
    left: 16px;
    top: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-node {
    transition: none;
  }
}