.page-about {
  --about-gap: 20px;
  --about-line: 1px solid var(--jb-line);
  background: var(--jb-ink);
  color: var(--jb-text);
  overflow-x: clip;
}

.page-about .about-crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  max-width: var(--jb-wrap);
  margin: 0 auto;
  padding: 20px var(--jb-gutter) 0;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--jb-text-mute);
}

.page-about .about-crumb__link {
  color: var(--jb-text-dim);
  text-decoration: none;
  transition: color .2s var(--jb-ease);
}

.page-about .about-crumb__link:hover,
.page-about .about-crumb__link:focus-visible {
  color: var(--jb-cyan);
}

.page-about .about-crumb__here {
  color: var(--jb-cyan);
  font-weight: 600;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: 40px 0 56px;
  background:
    radial-gradient(120% 92% at 90% 4%, rgba(34, 211, 238, .17), transparent 58%),
    radial-gradient(86% 74% at 4% 96%, rgba(229, 37, 123, .15), transparent 62%),
    var(--jb-ink);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 72px;
  background: var(--jb-layer);
  clip-path: polygon(0 100%, 100% 22%, 100% 100%);
  opacity: .5;
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 24px;
}

.page-about .about-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .14em;
  color: var(--jb-mist);
}

.page-about .about-hero__pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--jb-cyan);
  box-shadow: 0 0 0 4px rgba(34, 211, 238, .18);
}

.page-about .about-hero__title {
  margin: 0;
  font-size: clamp(34px, 8vw, 74px);
  font-weight: 250;
  line-height: 1.02;
  letter-spacing: -.03em;
  color: var(--jb-text);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--jb-text-dim);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  background: var(--jb-line);
  border: var(--about-line);
  border-radius: var(--jb-radius);
  overflow: hidden;
}

.page-about .about-stat {
  display: grid;
  gap: 6px;
  padding: 18px 16px;
  background: var(--jb-layer);
}

.page-about .about-stat__num {
  font-family: var(--jb-mono);
  font-size: clamp(26px, 5.6vw, 40px);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1;
  color: var(--jb-cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat__num em {
  font-style: normal;
  font-size: .42em;
  font-weight: 700;
  margin-left: 3px;
  color: var(--jb-mist);
}

.page-about .about-stat__label {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--jb-text-mute);
}

/* ---------- 双栏骨架 ---------- */

.page-about .about-shell {
  display: grid;
  gap: 28px;
  padding: 40px 0 72px;
}

.page-about .about-rail__cap {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--jb-text-mute);
}

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-rail__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 8px 14px;
  border: 2px solid var(--jb-line);
  border-radius: var(--jb-pill);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .2s var(--jb-ease), transform .2s var(--jb-ease), background .2s var(--jb-ease);
}

.page-about .about-rail__n {
  font-family: var(--jb-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--jb-cyan);
}

.page-about .about-rail__t {
  font-size: 13px;
  color: var(--jb-text-dim);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  border-color: var(--jb-cyan);
  background: rgba(34, 211, 238, .08);
  transform: translateY(-2px);
}

.page-about .about-body {
  display: grid;
  gap: 64px;
  min-width: 0;
}

/* ---------- 章节 ---------- */

.page-about .about-sec {
  display: grid;
  gap: 26px;
  scroll-margin-top: 96px;
}

.page-about .about-sec--last {
  padding-bottom: 8px;
}

.page-about .about-mark {
  border-left: 4px solid var(--jb-cyan);
  padding-left: 16px;
}

.page-about .about-lead {
  display: grid;
  gap: 14px;
  max-width: 68ch;
}

.page-about .about-lead p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--jb-text-dim);
}

.page-about .about-note {
  margin: 0;
  padding: 14px 16px;
  border-left: 3px solid var(--jb-orange);
  background: var(--jb-layer);
  font-size: 14px;
  line-height: 1.8;
  color: var(--jb-text-dim);
}

/* ---------- 两条主线 ---------- */

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

.page-about .about-pillar {
  position: relative;
  padding: 24px 22px;
  border: 2px solid var(--jb-line);
  border-radius: var(--jb-radius);
  background: var(--jb-layer);
  box-shadow: var(--jb-hard);
  transition: transform .24s var(--jb-ease), box-shadow .24s var(--jb-ease), border-color .24s var(--jb-ease);
}

.page-about .about-pillar:hover {
  transform: translateY(-6px);
  box-shadow: var(--jb-hard-lg);
  border-color: var(--jb-cyan);
}

.page-about .about-pillar--cyan {
  background: linear-gradient(150deg, rgba(34, 211, 238, .14), transparent 62%), var(--jb-layer);
}

.page-about .about-pillar--neon {
  background: linear-gradient(135deg, rgba(229, 37, 123, .28), rgba(139, 92, 246, .18) 70%, transparent), var(--jb-layer);
}

.page-about .about-pillar__tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 4px 10px;
  border-radius: var(--jb-pill);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--jb-ink);
  background: var(--jb-cyan);
}

.page-about .about-pillar--neon .about-pillar__tag {
  background: var(--jb-magenta);
  color: #fff;
}

.page-about .about-pillar__title {
  margin: 0 0 10px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--jb-text);
}

.page-about .about-pillar__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--jb-text-dim);
}

/* ---------- 五大板块 ---------- */

.page-about .about-boards {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-board {
  position: relative;
  display: grid;
  gap: 8px;
  padding: 22px 20px;
  border: 2px solid var(--jb-line);
  border-radius: var(--jb-radius);
  background: var(--jb-layer);
  transition: transform .24s var(--jb-ease), border-color .24s var(--jb-ease);
}

.page-about .about-board:hover {
  transform: translateY(-4px);
  border-color: var(--jb-cyan);
}

.page-about .about-board__idx {
  font-family: var(--jb-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--jb-text-mute);
}

.page-about .about-board__name {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--jb-text);
}

.page-about .about-board__for {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  color: var(--jb-mist);
}

.page-about .about-board__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--jb-text-dim);
}

.page-about .about-board--accent {
  border-color: rgba(229, 37, 123, .5);
  background: linear-gradient(140deg, rgba(229, 37, 123, .2), rgba(139, 92, 246, .12) 70%, transparent), var(--jb-layer);
}

.page-about .about-board--accent .about-board__for {
  color: #FFB4D7;
}

.page-about .about-board--gold {
  border-color: rgba(245, 194, 75, .45);
}

.page-about .about-board--gold .about-board__for {
  color: var(--jb-gold);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  display: grid;
  gap: 20px;
}

.page-about .about-team__frame {
  margin: 0;
}

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

.page-about .about-team__copy p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--jb-text-dim);
}

.page-about .about-team__acc {
  border-top: var(--about-line);
}

.page-about .about-team .jb-acc__trigger {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 16px 4px;
  border: 0;
  border-bottom: var(--about-line);
  background: transparent;
  cursor: pointer;
  text-align: left;
  transition: background .2s var(--jb-ease);
}

.page-about .about-team .jb-acc__trigger:hover {
  background: rgba(34, 211, 238, .06);
}

.page-about .about-team__idx {
  font-family: var(--jb-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--jb-cyan);
}

.page-about .about-team__name {
  flex: 1 1 auto;
  font-size: 16px;
  font-weight: 600;
  color: var(--jb-text);
}

.page-about .about-team .jb-acc__panel {
  padding: 14px 4px 20px 40px;
  border-bottom: var(--about-line);
}

.page-about .about-team .jb-acc__panel p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--jb-text-dim);
}

/* ---------- 时间线 ---------- */

.page-about .about-history__frame {
  margin: 0;
}

.page-about .about-tl {
  position: relative;
  display: grid;
  gap: 24px;
  margin: 0;
  padding: 0 0 0 26px;
  list-style: none;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--jb-cyan), var(--jb-magenta));
}

.page-about .about-tl__item {
  position: relative;
  display: grid;
  gap: 5px;
}

.page-about .about-tl__dot {
  position: absolute;
  left: -26px;
  top: 5px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--jb-ink);
  border: 2px solid var(--jb-cyan);
  transition: transform .22s var(--jb-ease), background .22s var(--jb-ease);
}

.page-about .about-tl__item:hover .about-tl__dot {
  transform: scale(1.4);
  background: var(--jb-cyan);
}

.page-about .about-tl__item--now .about-tl__dot {
  border-color: var(--jb-orange);
  box-shadow: 0 0 0 5px rgba(255, 107, 26, .18);
}

.page-about .about-tl__stage {
  font-family: var(--jb-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--jb-gold);
}

.page-about .about-tl__name {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--jb-text);
}

.page-about .about-tl__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--jb-text-dim);
}

/* ---------- 生产能力 ---------- */

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

.page-about .about-metric {
  display: grid;
  gap: 10px;
  padding: 20px;
  border: 2px solid var(--jb-line);
  border-radius: var(--jb-radius);
  background: var(--jb-layer);
}

.page-about .about-metric__num {
  font-family: var(--jb-mono);
  font-size: clamp(28px, 6vw, 44px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--jb-orange);
  font-variant-numeric: tabular-nums;
}

.page-about .about-metric__num em {
  font-style: normal;
  font-size: .38em;
  margin-left: 4px;
  color: var(--jb-text-dim);
}

.page-about .about-metric__name {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--jb-mist);
}

.page-about .about-metric__bar {
  display: block;
  height: 6px;
  border-radius: var(--jb-pill);
  background: var(--jb-line-soft);
  overflow: hidden;
}

.page-about .about-metric__fill {
  display: block;
  width: var(--fill, 70%);
  height: 100%;
  border-radius: var(--jb-pill);
  background: linear-gradient(90deg, var(--jb-cyan), var(--jb-orange));
}

.page-about .about-metric__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--jb-text-dim);
}

/* ---------- 合作生态 ---------- */

.page-about .about-eco {
  display: grid;
  gap: 28px;
}

.page-about .about-eco__copy {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-eco__copy p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--jb-text-dim);
}

.page-about .about-eco__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-eco__map {
  position: relative;
  width: 100%;
  max-width: 460px;
  margin: 0 auto;
  aspect-ratio: 1 / 1;
}

.page-about .about-eco__frame {
  position: absolute;
  inset: 0;
  margin: 0;
  opacity: .34;
}

.page-about .about-eco__svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.page-about .about-eco__svg line {
  stroke: var(--jb-cyan);
  stroke-width: 1;
  opacity: .45;
  vector-effect: non-scaling-stroke;
}

.page-about .about-eco__hub,
.page-about .about-eco__node {
  position: absolute;
  transform: translate(-50%, -50%);
  border-radius: var(--jb-pill);
  white-space: nowrap;
  transition: transform .22s var(--jb-ease), color .22s var(--jb-ease), border-color .22s var(--jb-ease);
}

.page-about .about-eco__hub {
  left: 50%;
  top: 50%;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 800;
  color: var(--jb-orange-deep);
  background: var(--jb-orange);
  box-shadow: var(--jb-hard-sm);
}

.page-about .about-eco__node {
  padding: 7px 13px;
  border: 2px solid var(--jb-line);
  background: var(--jb-layer);
  font-size: 12px;
  font-weight: 600;
  color: var(--jb-text-dim);
}

.page-about .about-eco__node:hover {
  transform: translate(-50%, -50%) scale(1.08);
  border-color: var(--jb-cyan);
  color: var(--jb-cyan);
}

.page-about .about-eco__node--1 { left: 50%; top: 12%; }
.page-about .about-eco__node--2 { left: 83%; top: 31%; }
.page-about .about-eco__node--3 { left: 83%; top: 69%; }
.page-about .about-eco__node--4 { left: 50%; top: 88%; }
.page-about .about-eco__node--5 { left: 17%; top: 69%; }
.page-about .about-eco__node--6 { left: 17%; top: 31%; }

/* ---------- 运营标准 ---------- */

.page-about .about-standards {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-standard {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 20px;
  border: 2px solid var(--jb-line);
  border-radius: var(--jb-radius);
  background: var(--jb-layer);
  transition: border-color .22s var(--jb-ease);
}

.page-about .about-standard:hover {
  border-color: var(--jb-gold);
}

.page-about .about-standard__idx {
  font-family: var(--jb-mono);
  font-size: 15px;
  font-weight: 800;
  color: var(--jb-gold);
}

.page-about .about-standard__name {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--jb-text);
}

.page-about .about-standard__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--jb-text-dim);
}

/* ---------- 收束行动区 ---------- */

.page-about .about-cta {
  margin-top: 12px;
  padding: 30px 22px;
  border: 2px solid var(--jb-line);
  border-radius: var(--jb-radius);
  background:
    linear-gradient(135deg, rgba(34, 211, 238, .16), rgba(255, 107, 26, .14) 78%, transparent),
    var(--jb-layer);
  box-shadow: var(--jb-hard);
}

.page-about .about-cta__title {
  margin: 0 0 10px;
  font-size: clamp(22px, 4.6vw, 32px);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--jb-text);
}

.page-about .about-cta__desc {
  margin: 0 0 20px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--jb-text-dim);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 平板 ---------- */

@media (min-width: 720px) {
  .page-about {
    --about-gap: 24px;
  }

  .page-about .about-hero {
    padding: 64px 0 88px;
  }

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

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

  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
    gap: 26px;
  }

  .page-about .about-tl {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 32px;
  }

  .page-about .about-tl::before {
    display: none;
  }

  .page-about .about-tl__item {
    padding-top: 20px;
    border-top: 1px solid var(--jb-line);
  }

  .page-about .about-tl__dot {
    left: 0;
    top: -7px;
  }

  .page-about .about-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 34px 32px;
  }

  .page-about .about-cta__desc {
    margin-bottom: 0;
  }
}

/* ---------- 桌面 ---------- */

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 76px 0 112px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    column-gap: 48px;
  }

  .page-about .about-hero__kicker,
  .page-about .about-hero__lede {
    grid-column: 1 / 2;
  }

  .page-about .about-hero__title {
    grid-column: 1 / 3;
  }

  .page-about .about-hero__stats {
    grid-column: 2 / 3;
    grid-row: 1 / 3;
    align-self: end;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-shell {
    grid-template-columns: 168px minmax(0, 1fr);
    column-gap: 56px;
    padding-bottom: 96px;
  }

  .page-about .about-rail {
    position: sticky;
    top: 104px;
    align-self: start;
  }

  .page-about .about-rail__cap {
    border-left: 2px solid var(--jb-line);
    padding-left: 10px;
  }

  .page-about .about-rail__list {
    display: grid;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__link {
    border-color: transparent;
    border-radius: var(--jb-radius);
    padding: 9px 10px;
    white-space: normal;
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    border-color: var(--jb-line);
    background: var(--jb-layer);
    transform: translateX(4px);
  }

  .page-about .about-body {
    gap: 92px;
  }

  .page-about .about-boards {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-board {
    grid-column: span 3;
  }

  .page-about .about-board:nth-child(3),
  .page-about .about-board:nth-child(4) {
    grid-column: span 3;
    transform: translateY(24px);
  }

  .page-about .about-board:nth-child(5) {
    grid-column: span 6;
  }

  .page-about .about-board:nth-child(3):hover,
  .page-about .about-board:nth-child(4):hover {
    transform: translateY(18px);
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 36px;
  }

  .page-about .about-tl {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-eco {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 40px;
    align-items: center;
  }

  .page-about .about-eco__map {
    margin: 0;
    max-width: 480px;
    justify-self: end;
  }

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

@media (min-width: 1280px) {
  .page-about .about-shell {
    grid-template-columns: 200px minmax(0, 1fr);
    column-gap: 72px;
  }
}

/* ---------- 降低动态效果 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-about .about-pillar,
  .page-about .about-board,
  .page-about .about-rail__link,
  .page-about .about-tl__dot,
  .page-about .about-eco__node {
    transition-duration: .01ms;
  }

  .page-about .about-pillar:hover,
  .page-about .about-board:hover,
  .page-about .about-rail__link:hover,
  .page-about .about-eco__node:hover {
    transform: none;
  }
}

.page-about {
  --fill: currentColor;
}