.page-about {
  --abx-ink: #041A14;
  --abx-panel: #0A2F25;
  --abx-line: #13543F;
  --abx-dim: #C9BFAD;
  background: var(--mbx-ink-950);
  color: var(--mbx-paper);
  overflow-x: hidden;
}

.page-about .abx-wrap {
  width: min(100% - 2 * var(--mbx-gutter), var(--mbx-max));
  margin-inline: auto;
}

/* ---------- 首屏 ---------- */
.page-about .abx-hero {
  position: relative;
  padding: calc(var(--mbx-header-h) + 34px) 0 10px;
  background:
    radial-gradient(120% 82% at 92% -4%, rgba(41, 199, 245, .16), transparent 62%),
    radial-gradient(88% 70% at -6% 104%, rgba(255, 106, 26, .17), transparent 62%),
    var(--mbx-ink-950);
}

.page-about .abx-hero__frame {
  position: relative;
  width: min(100% - 2 * var(--mbx-gutter), var(--mbx-max));
  margin-inline: auto;
  padding: clamp(34px, 5vw, 66px) clamp(20px, 4vw, 58px) clamp(26px, 3.6vw, 46px);
  border: 1px solid var(--mbx-ink-600);
  border-radius: var(--mbx-r-lg);
  background: linear-gradient(158deg, rgba(10, 47, 37, .88), rgba(4, 26, 20, .95));
}

.page-about .abx-hero__frame::before,
.page-about .abx-hero__frame::after {
  content: "";
  position: absolute;
  left: clamp(20px, 4vw, 58px);
  right: clamp(20px, 4vw, 58px);
  height: 9px;
  pointer-events: none;
  background-image: repeating-linear-gradient(90deg, var(--mbx-ink-600) 0 1px, transparent 1px 26px);
  opacity: .9;
}

.page-about .abx-hero__frame::before { top: 14px; }
.page-about .abx-hero__frame::after { bottom: 14px; }

.page-about .mbx-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(22px, 3vw, 36px);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mbx-paper-70);
}

.page-about .mbx-crumbs a {
  color: var(--mbx-blue-500);
  text-decoration: none;
}

.page-about .mbx-crumbs a:hover { text-decoration: underline; }

.page-about .abx-hero__eyebrow {
  color: var(--mbx-orange-300);
  margin: 0 0 14px;
}

.page-about .abx-hero__title {
  margin: 0 0 clamp(18px, 2.6vw, 30px);
  font-family: var(--mbx-display);
  font-weight: 700;
  font-size: clamp(40px, 8.6vw, 100px);
  line-height: .94;
  letter-spacing: -.02em;
  color: var(--mbx-paper);
  transform: rotate(-1.3deg);
  transform-origin: left bottom;
}

.page-about .abx-hero__lead {
  max-width: 46em;
  margin: 0 0 clamp(28px, 4vw, 44px);
  font-size: clamp(16px, 1.4vw, 18px);
  line-height: 1.8;
  color: var(--mbx-paper);
}

.page-about .abx-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
  margin: 0;
  padding: clamp(18px, 3vw, 26px) 0 0;
  border-top: 1px solid var(--mbx-ink-600);
  list-style: none;
}

.page-about .abx-facts__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .abx-facts__num {
  font-family: var(--mbx-mono);
  font-size: clamp(19px, 2.2vw, 26px);
  letter-spacing: .02em;
  color: var(--mbx-orange-500);
}

.page-about .abx-facts__item:nth-child(even) .abx-facts__num { color: var(--mbx-blue-500); }

.page-about .abx-facts__key {
  font-size: 13px;
  line-height: 1.5;
  color: var(--mbx-paper-70);
}

/* ---------- 工作台影像 ---------- */
.page-about .abx-workbench {
  width: min(100% - 2 * var(--mbx-gutter), var(--mbx-max));
  margin: clamp(26px, 4vw, 54px) auto clamp(14px, 2vw, 22px);
}

.page-about .abx-workbench img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--mbx-ink-600);
  border-radius: var(--mbx-r-lg);
  filter: saturate(.82) contrast(1.04);
}

.page-about .abx-workbench__cap {
  margin-top: 12px;
  max-width: 58ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mbx-paper-70);
}

/* ---------- 胶囊索引 ---------- */
.page-about .abx-rail {
  padding: 0 var(--mbx-gutter);
}

.page-about .abx-rail__inner {
  width: min(100%, var(--mbx-max));
  margin-inline: auto;
}

.page-about .abx-rail .mbx-index {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 4px 2px 12px;
  scrollbar-width: thin;
  scrollbar-color: var(--mbx-ink-600) transparent;
}

.page-about .abx-rail .mbx-index::-webkit-scrollbar { height: 6px; }
.page-about .abx-rail .mbx-index::-webkit-scrollbar-thumb {
  background: var(--mbx-ink-600);
  border-radius: 999px;
}

.page-about .mbx-index__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--mbx-ink-600);
  border-radius: var(--mbx-r-pill);
  color: var(--mbx-paper-70);
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  transition: color .22s var(--mbx-ease), border-color .22s var(--mbx-ease), background-color .22s var(--mbx-ease);
}

.page-about .mbx-index__link:hover,
.page-about .mbx-index__link:focus-visible {
  color: var(--mbx-paper);
  border-color: var(--mbx-orange-500);
}

.page-about .mbx-index__link[aria-current="true"] {
  background: var(--mbx-orange-500);
  border-color: var(--mbx-orange-500);
  color: var(--mbx-ink-950);
  font-weight: 600;
}

.page-about .mbx-index__num {
  font-size: 11px;
  letter-spacing: .06em;
  opacity: .82;
}

/* ---------- 章节骨架 ---------- */
.page-about .abx-sec {
  padding: clamp(46px, 7vw, 92px) 0;
}

.page-about .abx-sec--dark {
  background: var(--mbx-ink-950);
}

.page-about .abx-sec--light {
  background: var(--mbx-paper);
  color: var(--mbx-ink-950);
}

.page-about .abx-sec--light:first-of-type {
  margin-top: clamp(48px, 6vw, 84px);
}

.page-about .abx-sec--light {
  position: relative;
}

.page-about .abx-sec--light::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 100%;
  height: clamp(56px, 6vw, 88px);
  background: var(--mbx-paper);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
  pointer-events: none;
}

.page-about .abx-sec--last {
  padding-bottom: clamp(64px, 9vw, 120px);
}

.page-about .abx-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2vw, 26px);
}

.page-about .abx-sec__aside {
  padding-top: 6px;
}

.page-about .abx-eyebrow,
.page-about .abx-sec .mbx-eyebrow {
  color: var(--mbx-orange-300);
  margin: 0;
}

.page-about .abx-sec--light .mbx-eyebrow {
  color: var(--mbx-ink-600);
}

.page-about .abx-h2 {
  margin: 0 0 clamp(16px, 2vw, 24px);
  font-family: var(--mbx-display);
  font-weight: 600;
  font-size: clamp(25px, 3.6vw, 42px);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--mbx-paper);
  max-width: 22em;
}

.page-about .abx-sec--light .abx-h2 {
  color: var(--mbx-ink-950);
}

.page-about .abx-p {
  max-width: 40em;
  margin: 0 0 18px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--mbx-paper);
}

.page-about .abx-p--tight {
  margin-bottom: 12px;
  font-size: 16px;
}

.page-about .abx-sec--light .abx-p {
  color: #2B3D36;
}

.page-about .abx-p:last-child { margin-bottom: 0; }

/* ---------- 三层结构 ---------- */
.page-about .abx-layers {
  display: grid;
  gap: 14px;
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .abx-layers__item {
  display: flex;
  gap: 18px;
  padding: 20px 22px;
  border: 1px solid var(--mbx-ink-600);
  border-left-width: 3px;
  border-radius: var(--mbx-r-md);
  background: rgba(10, 47, 37, .72);
  transition: border-color .24s var(--mbx-ease), background-color .24s var(--mbx-ease), transform .24s var(--mbx-ease);
}

.page-about .abx-layers__item:hover,
.page-about .abx-layers__item:focus-within {
  border-color: var(--mbx-orange-500);
  background: rgba(19, 84, 63, .62);
  transform: translateX(6px);
}

.page-about .abx-layers__idx {
  flex: 0 0 auto;
  padding-top: 4px;
  font-family: var(--mbx-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--mbx-blue-500);
}

.page-about .abx-layers__item h3 {
  margin: 0 0 8px;
  font-family: var(--mbx-display);
  font-weight: 600;
  font-size: clamp(19px, 2.2vw, 24px);
  line-height: 1.2;
  color: var(--mbx-paper);
}

.page-about .abx-layers__item .abx-p {
  margin-bottom: 0;
  font-size: 15.5px;
  color: var(--mbx-paper-70);
}

.page-about .abx-figure {
  margin: clamp(26px, 4vw, 44px) 0 0;
}

.page-about .abx-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--mbx-ink-600);
  border-radius: var(--mbx-r-md);
  filter: saturate(.84) contrast(1.02);
}

.page-about .abx-figure__cap {
  margin-top: 10px;
  max-width: 58ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mbx-paper-70);
}

/* ---------- 团队 ---------- */
.page-about .abx-crew {
  display: grid;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .abx-crew__item {
  border: 1px solid var(--mbx-ink-600);
  border-radius: var(--mbx-r-md);
  background: rgba(10, 47, 37, .6);
  transition: border-color .24s var(--mbx-ease);
}

.page-about .abx-crew__item[open] {
  border-color: rgba(255, 106, 26, .55);
}

.page-about .abx-crew__item:hover { border-color: var(--mbx-orange-500); }

.page-about .abx-crew__head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .abx-crew__num {
  flex: 0 0 auto;
  min-width: 2.4em;
  font-family: var(--mbx-mono);
  font-size: clamp(20px, 2.4vw, 26px);
  letter-spacing: .02em;
  color: var(--mbx-orange-500);
}

.page-about .abx-crew__role {
  font-family: var(--mbx-display);
  font-weight: 600;
  font-size: clamp(17px, 1.8vw, 21px);
  color: var(--mbx-paper);
}

.page-about .abx-crew__chev {
  margin-left: auto;
  font-family: var(--mbx-mono);
  font-size: 18px;
  color: var(--mbx-blue-500);
  transition: transform .24s var(--mbx-ease);
}

.page-about .abx-crew__item[open] .abx-crew__chev { transform: rotate(45deg); }

.page-about .abx-crew__body {
  padding: 0 20px 20px 20px;
  border-top: 1px solid rgba(19, 84, 63, .6);
  margin-top: 2px;
  padding-top: 18px;
}

.page-about .abx-crew__body .abx-p {
  color: var(--mbx-paper-70);
}

.page-about .abx-crew__body .mbx-list {
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .abx-crew__body .mbx-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mbx-dim);
}

.page-about .abx-crew__body .mbx-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 9px;
  height: 2px;
  background: var(--mbx-orange-300);
}

/* ---------- 版本演进 ---------- */
.page-about .abx-badge {
  margin: clamp(22px, 3vw, 34px) 0 0;
}

.page-about .abx-badge img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 5;
  object-fit: cover;
  border: 1px solid rgba(19, 84, 63, .35);
  border-radius: var(--mbx-r-md);
  filter: saturate(.78) contrast(1.05);
}

.page-about .abx-tl {
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .abx-tl__item {
  position: relative;
  padding: 0 0 22px 76px;
}

.page-about .abx-tl__item::before {
  content: "";
  position: absolute;
  left: 25px;
  top: 10px;
  bottom: -4px;
  width: 2px;
  background: linear-gradient(180deg, rgba(19, 84, 63, .8), rgba(19, 84, 63, .18));
}

.page-about .abx-tl__item:last-child { padding-bottom: 0; }
.page-about .abx-tl__item:last-child::before { display: none; }

.page-about .abx-tl__dot {
  position: absolute;
  left: 18px;
  top: 12px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--mbx-paper);
  border: 3px solid var(--mbx-ink-600);
}

.page-about .abx-tl__item.is-now .abx-tl__dot {
  border-color: var(--mbx-orange-500);
  box-shadow: 0 0 0 5px rgba(255, 106, 26, .16);
}

.page-about .abx-tl__node {
  border-radius: var(--mbx-r-md);
  padding: 2px 0;
}

.page-about .abx-tl__sum {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .abx-tl__ver {
  font-family: var(--mbx-mono);
  font-size: 13px;
  letter-spacing: .04em;
  padding: 4px 10px;
  border-radius: var(--mbx-r-pill);
  background: rgba(19, 84, 63, .12);
  border: 1px solid rgba(19, 84, 63, .35);
  color: var(--mbx-ink-600);
}

.page-about .abx-tl__item.is-now .abx-tl__ver {
  background: var(--mbx-orange-500);
  border-color: var(--mbx-orange-500);
  color: #FFFFFF;
}

.page-about .abx-tl__name {
  font-family: var(--mbx-display);
  font-weight: 600;
  font-size: clamp(17px, 1.9vw, 22px);
  color: var(--mbx-ink-950);
}

.page-about .abx-tl__chev {
  margin-left: auto;
  font-family: var(--mbx-mono);
  font-size: 17px;
  color: var(--mbx-ink-600);
  transition: transform .24s var(--mbx-ease);
}

.page-about .abx-tl__node[open] .abx-tl__chev { transform: rotate(45deg); }

.page-about .abx-tl__body {
  padding: 12px 0 0;
}

.page-about .abx-tl__body .abx-p {
  color: #2B3D36;
  font-size: 16px;
}

/* ---------- 把关与合作 ---------- */
.page-about .abx-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: clamp(20px, 3vw, 28px) 0 0;
  border-top: 1px solid rgba(19, 84, 63, .3);
  list-style: none;
}

.page-about .abx-stats__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .abx-stats__k {
  font-family: var(--mbx-mono);
  font-size: clamp(19px, 2.2vw, 26px);
  letter-spacing: .02em;
  color: var(--mbx-blue-800);
}

.page-about .abx-stats__v {
  font-size: 13.5px;
  line-height: 1.6;
  color: #3D4F47;
}

/* ---------- 每日承诺 ---------- */
.page-about .abx-promise {
  display: grid;
  gap: 2px;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(19, 84, 63, .28);
}

.page-about .abx-promise__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(19, 84, 63, .28);
  transition: padding-left .24s var(--mbx-ease), border-color .24s var(--mbx-ease);
}

.page-about .abx-promise__item:hover {
  padding-left: 10px;
  border-color: var(--mbx-orange-500);
}

.page-about .abx-promise__k {
  font-family: var(--mbx-mono);
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--mbx-orange-500);
}

.page-about .abx-promise__v {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: #2B3D36;
}

.page-about .abx-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
  margin-top: clamp(28px, 4vw, 42px);
}

.page-about .abx-actions__link {
  color: var(--mbx-blue-800);
  font-size: 15px;
  text-decoration: none;
  border-bottom: 1px solid rgba(11, 59, 92, .4);
  padding-bottom: 2px;
  transition: color .2s var(--mbx-ease), border-color .2s var(--mbx-ease);
}

.page-about .abx-actions__link:hover {
  color: var(--mbx-orange-500);
  border-color: var(--mbx-orange-500);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .abx-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .abx-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .abx-promise__item {
    grid-template-columns: 130px minmax(0, 1fr);
    align-items: baseline;
    gap: 20px;
  }
}

@media (min-width: 960px) {
  .page-about .abx-cols {
    grid-template-columns: minmax(150px, 200px) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 60px);
  }
  .page-about .abx-sec__aside {
    padding-top: 12px;
  }
  .page-about .abx-crew {
    gap: 14px;
  }
  .page-about .abx-badge {
    max-width: 460px;
  }
}

@media (min-width: 1200px) {
  .page-about .abx-hero__frame {
    padding-top: clamp(48px, 5vw, 76px);
  }
  .page-about .abx-crew__head {
    padding: 20px 26px;
  }
  .page-about .abx-crew__body {
    padding: 20px 26px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .abx-layers__item,
  .page-about .abx-promise__item,
  .page-about .mbx-index__link,
  .page-about .abx-crew__chev,
  .page-about .abx-tl__chev {
    transition: none;
  }
  .page-about .abx-layers__item:hover,
  .page-about .abx-layers__item:focus-within,
  .page-about .abx-promise__item:hover {
    transform: none;
    padding-left: 0;
  }
  .page-about .abx-hero__title {
    transform: none;
  }
}

.page-about {
  --mbx-dim: currentColor;
}