.page-about {
  --ab-glow: 0 24px 60px -28px rgba(107, 47, 160, .7);
  --ab-glow-green: 0 22px 50px -26px rgba(59, 178, 115, .55);
}

/* ---------- 面包屑 ---------- */
.page-about .ab-crumb {
  padding-top: 26px;
  padding-bottom: 6px;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: 40px 0 60px;
  border-radius: 0 0 var(--nv-radius-l) var(--nv-radius-l);
  isolation: isolate;
}

.page-about .ab-hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .ab-hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .42;
  filter: saturate(1.15) contrast(1.05);
}

.page-about .ab-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 90% at 82% 8%, rgba(107, 47, 160, .52), transparent 56%),
    radial-gradient(90% 70% at 6% 92%, rgba(59, 178, 115, .22), transparent 60%),
    linear-gradient(180deg, rgba(10, 8, 16, .74) 0%, rgba(26, 11, 46, .88) 58%, var(--nv-ink) 100%);
}

.page-about .ab-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 30px;
}

.page-about .ab-hero__title {
  font-size: clamp(38px, 8vw, 78px);
  line-height: 1.04;
  letter-spacing: -.02em;
  margin: 14px 0 18px;
}

.page-about .ab-hero__lead {
  max-width: 34ch;
  color: var(--nv-mist);
  font-size: clamp(15px, 2.4vw, 18px);
}

.page-about .ab-hero__panel {
  border: 1px solid var(--nv-line-strong);
  border-radius: var(--nv-radius-m);
  background: linear-gradient(158deg, rgba(26, 11, 46, .9), rgba(10, 8, 16, .76));
  padding: 22px 20px;
  box-shadow: var(--ab-glow);
}

.page-about .ab-panel__label {
  margin: 0 0 16px;
  font-size: 13px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--nv-silver);
}

.page-about .ab-metrics {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
}

.page-about .ab-metric {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 14px;
  border-left: 2px solid rgba(107, 47, 160, .55);
}

.page-about .ab-metric:nth-child(2) {
  border-left-color: rgba(59, 178, 115, .55);
}

.page-about .ab-metric:nth-child(3) {
  border-left-color: rgba(212, 160, 23, .55);
}

.page-about .ab-metric:nth-child(4) {
  border-left-color: var(--nv-line-strong);
}

.page-about .ab-metric__num {
  font-size: 30px;
  line-height: 1;
  color: var(--nv-white);
  font-weight: 700;
}

.page-about .ab-metric__plus,
.page-about .ab-metric__unit {
  font-size: 15px;
  margin-left: 2px;
  color: var(--nv-green);
}

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

/* ---------- 定位 ---------- */
.page-about .ab-split {
  display: grid;
  gap: 26px;
}

.page-about .ab-split__lead h2 {
  margin-top: 14px;
}

.page-about .ab-split__swatch {
  margin-top: 26px;
  width: 100%;
  max-width: 220px;
  height: 10px;
  border-radius: var(--nv-pill);
  background: linear-gradient(90deg, var(--nv-grape), var(--nv-green) 62%, var(--nv-gold));
}

.page-about .ab-split__body p {
  color: var(--nv-mist);
  font-size: 16px;
  line-height: 1.85;
  margin: 0 0 16px;
}

.page-about .ab-split__body p:first-child {
  color: var(--nv-white);
}

.page-about .ab-taglist {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 历程 ---------- */
.page-about .ab-road__head {
  max-width: 62ch;
  margin-bottom: 34px;
}

.page-about .ab-road__head h2 {
  margin: 14px 0 14px;
}

.page-about .ab-road__lead {
  color: var(--nv-mist);
  font-size: 16px;
}

.page-about .ab-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 6px 0 6px 34px;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 16px;
  bottom: 16px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--nv-grape), var(--nv-green) 55%, rgba(59, 178, 115, 0));
}

.page-about .ab-tl {
  position: relative;
  padding: 0 0 30px;
}

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

.page-about .ab-tl__dot {
  position: absolute;
  left: -33px;
  top: 6px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--nv-ink);
  border: 2px solid var(--nv-grape);
  box-shadow: 0 0 0 6px rgba(107, 47, 160, .16);
}

.page-about .ab-tl:nth-child(2) .ab-tl__dot {
  border-color: var(--nv-green);
  box-shadow: 0 0 0 6px rgba(59, 178, 115, .14);
}

.page-about .ab-tl:nth-child(3) .ab-tl__dot {
  border-color: var(--nv-gold);
  box-shadow: 0 0 0 6px rgba(212, 160, 23, .14);
}

.page-about .ab-tl__body {
  border: 1px solid var(--nv-line);
  border-radius: var(--nv-radius-m);
  background: rgba(18, 7, 31, .62);
  padding: 20px 22px;
  transition: transform .35s var(--nv-ease), border-color .35s var(--nv-ease), box-shadow .35s var(--nv-ease);
}

.page-about .ab-tl__body:hover {
  transform: translateY(-3px);
  border-color: rgba(107, 47, 160, .55);
  box-shadow: var(--ab-glow);
}

.page-about .ab-tl__stage {
  margin: 0 0 6px;
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--nv-gold);
}

.page-about .ab-tl__body h3 {
  margin: 0 0 10px;
  font-size: clamp(19px, 3.4vw, 24px);
}

.page-about .ab-tl__body p {
  margin: 0;
  color: var(--nv-mist);
  font-size: 15px;
  line-height: 1.85;
}

/* ---------- 内容体系 ---------- */
.page-about .ab-folds {
  display: grid;
  gap: 14px;
}

.page-about .ab-fold {
  border: 1px solid var(--nv-line);
  border-radius: var(--nv-radius-m);
  background: rgba(18, 7, 31, .58);
  overflow: hidden;
  transition: border-color .3s var(--nv-ease), background .3s var(--nv-ease);
}

.page-about .ab-fold[open] {
  border-color: rgba(107, 47, 160, .58);
  background: rgba(26, 11, 46, .74);
}

.page-about .ab-fold--green[open] {
  border-color: rgba(59, 178, 115, .55);
}

.page-about .ab-fold--gold[open] {
  border-color: rgba(212, 160, 23, .5);
}

.page-about .ab-fold--silver[open] {
  border-color: var(--nv-line-strong);
}

.page-about .ab-fold__sum {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  grid-template-areas:
    "idx name mark"
    "idx hint mark";
  align-items: center;
  gap: 4px 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .ab-fold__idx {
  grid-area: idx;
  font-family: var(--nv-font-num);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--nv-silver);
}

.page-about .ab-fold__name {
  grid-area: name;
  font-family: var(--nv-font-display);
  font-weight: 800;
  font-size: clamp(18px, 3.6vw, 22px);
  letter-spacing: -.01em;
  color: var(--nv-white);
}

.page-about .ab-fold__hint {
  grid-area: hint;
  font-size: 13px;
  color: var(--nv-mist);
  line-height: 1.5;
}

.page-about .ab-fold__mark {
  grid-area: mark;
  position: relative;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid var(--nv-line-strong);
  flex: none;
}

.page-about .ab-fold__mark::before,
.page-about .ab-fold__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--nv-green);
  transform: translate(-50%, -50%);
  transition: opacity .25s var(--nv-ease), transform .25s var(--nv-ease);
}

.page-about .ab-fold__mark::before {
  width: 10px;
  height: 2px;
}

.page-about .ab-fold__mark::after {
  width: 2px;
  height: 10px;
}

.page-about .ab-fold[open] .ab-fold__mark::after {
  opacity: 0;
  transform: translate(-50%, -50%) scaleY(.2);
}

.page-about .ab-fold__panel {
  padding: 0 20px 20px;
  border-top: 1px solid var(--nv-line);
  margin-top: 2px;
}

.page-about .ab-fold__panel p {
  margin: 16px 0 0;
  color: var(--nv-mist);
  font-size: 15px;
  line-height: 1.85;
}

.page-about .ab-fold__count {
  font-family: var(--nv-font-num);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--nv-silver);
}

.page-about .ab-fold__count a {
  color: var(--nv-green);
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 178, 115, .45);
}

.page-about .ab-fold__count a:hover {
  color: var(--nv-white);
}

/* ---------- 团队 ---------- */
.page-about .ab-team__grid {
  display: grid;
  gap: 28px;
  align-items: center;
}

.page-about .ab-team__figure {
  margin: 0;
  border-radius: var(--nv-radius-l);
  overflow: hidden;
  border: 1px solid var(--nv-line);
  background: linear-gradient(150deg, rgba(107, 47, 160, .28), rgba(10, 8, 16, .9));
}

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

.page-about .ab-team__figure .nv-media__cap {
  display: block;
  padding: 12px 16px;
  font-size: 12.5px;
  color: var(--nv-mist);
}

.page-about .ab-team__copy h2 {
  margin: 14px 0 16px;
}

.page-about .ab-team__copy > p {
  color: var(--nv-mist);
  font-size: 15.5px;
  line-height: 1.85;
  margin: 0 0 16px;
}

.page-about .ab-team__stats {
  list-style: none;
  margin: 20px 0 22px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.page-about .ab-team__stat {
  border-radius: var(--nv-radius-s);
  border: 1px solid var(--nv-line);
  background: rgba(18, 7, 31, .6);
  padding: 16px 12px;
  text-align: center;
  transition: border-color .3s var(--nv-ease), transform .3s var(--nv-ease);
}

.page-about .ab-team__stat:hover {
  border-color: rgba(59, 178, 115, .5);
  transform: translateY(-2px);
}

.page-about .ab-team__n {
  display: block;
  font-size: 30px;
  line-height: 1;
  color: var(--nv-white);
  font-weight: 700;
}

.page-about .ab-team__l {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--nv-mist);
}

/* ---------- 本地化 ---------- */
.page-about .ab-xj__grid {
  display: grid;
  gap: 28px;
}

.page-about .ab-xj__copy h2 {
  margin: 14px 0 16px;
}

.page-about .ab-xj__copy > p {
  color: var(--nv-mist);
  font-size: 15.5px;
  line-height: 1.85;
  margin: 0 0 16px;
}

.page-about .ab-xj__info {
  margin: 24px 0 0;
  padding: 4px 0 0;
  border-top: 1px solid var(--nv-line);
}

.page-about .ab-xj__row {
  display: grid;
  gap: 2px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--nv-line);
}

.page-about .ab-xj__row dt {
  font-size: 12.5px;
  letter-spacing: .14em;
  color: var(--nv-gold);
}

.page-about .ab-xj__row dd {
  margin: 0;
  font-size: 15px;
  color: var(--nv-white);
  line-height: 1.7;
}

.page-about .ab-xj__figure {
  margin: 0;
  border-radius: var(--nv-radius-l);
  overflow: hidden;
  border: 1px solid var(--nv-line-strong);
  box-shadow: var(--ab-glow-green);
}

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

.page-about .ab-xj__figure .nv-media__cap {
  display: block;
  padding: 12px 16px;
  font-size: 12.5px;
  color: var(--nv-mist);
}

/* ---------- 协作 ---------- */
.page-about .ab-eco__grid {
  display: grid;
  gap: 18px;
}

.page-about .ab-eco__card {
  padding: 22px;
}

.page-about .ab-eco__card--gold {
  border-color: rgba(212, 160, 23, .42);
  background: linear-gradient(160deg, rgba(212, 160, 23, .1), rgba(18, 7, 31, .85));
}

.page-about .ab-eco__card .nv-card__title {
  font-size: clamp(18px, 3.4vw, 21px);
  margin: 8px 0 10px;
}

/* ---------- CTA ---------- */
.page-about .ab-cta {
  margin-top: clamp(48px, 8vw, 88px);
  padding: clamp(34px, 6vw, 60px) 0;
  background:
    radial-gradient(110% 130% at 88% 0%, rgba(107, 47, 160, .42), transparent 58%),
    linear-gradient(140deg, var(--nv-deep), var(--nv-ink));
  border-top: 1px solid var(--nv-line);
  border-radius: var(--nv-radius-l) var(--nv-radius-l) 0 0;
}

.page-about .ab-cta__inner {
  display: grid;
  gap: 24px;
}

.page-about .ab-cta__title {
  margin: 0 0 12px;
}

.page-about .ab-cta__text {
  margin: 0;
  color: var(--nv-mist);
  font-size: 15.5px;
  line-height: 1.85;
  max-width: 46ch;
}

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

/* ---------- 中屏及以上 ---------- */
@media (min-width: 760px) {
  .page-about .ab-fold__sum {
    grid-template-columns: auto minmax(0, 230px) minmax(0, 1fr) auto;
    grid-template-areas: "idx name hint mark";
    gap: 0 20px;
    padding: 22px 24px;
  }

  .page-about .ab-xj__row {
    grid-template-columns: 130px minmax(0, 1fr);
    align-items: baseline;
    gap: 0 18px;
  }

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

@media (min-width: 900px) {
  .page-about .ab-hero {
    padding: 64px 0 78px;
  }

  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(300px, .85fr);
    align-items: end;
    gap: 56px;
  }

  .page-about .ab-split {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    gap: 60px;
    align-items: start;
  }

  .page-about .ab-split__lead {
    position: sticky;
    top: 96px;
  }

  .page-about .ab-timeline {
    padding-left: 46px;
  }

  .page-about .ab-timeline::before {
    left: 13px;
  }

  .page-about .ab-tl__dot {
    left: -45px;
    width: 24px;
    height: 24px;
  }

  .page-about .ab-tl__body {
    padding: 26px 30px;
  }

  .page-about .ab-team__grid {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    gap: 52px;
  }

  .page-about .ab-xj__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 54px;
    align-items: center;
  }

  .page-about .ab-cta__inner {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
    align-items: center;
    gap: 40px;
  }

  .page-about .ab-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1180px) {
  .page-about .ab-hero__title {
    font-size: 78px;
  }

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

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

  .page-about .ab-tl__body:hover,
  .page-about .ab-team__stat:hover {
    transform: none;
  }
}