.page-about {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  margin: 0;
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.12;
}

.page-about p {
  margin: 0;
}

.page-about a {
  color: var(--flesh-deep);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  isolation: isolate;
  padding: 20px 0 52px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(130% 80% at 6% -14%, rgba(142, 198, 63, 0.24), transparent 62%),
    radial-gradient(90% 70% at 102% 4%, rgba(255, 195, 0, 0.14), transparent 58%),
    var(--paper);
}

.page-about .ab-hero__track {
  position: absolute;
  inset: auto 0 0 0;
  width: 100%;
  height: 160px;
  z-index: -1;
  opacity: 0.75;
}

.page-about .ab-hero__inner {
  position: relative;
}

.page-about .ab-hero__kicker {
  margin-top: 18px;
}

.page-about .ab-hero__grid {
  display: grid;
  gap: 28px;
  margin-top: 14px;
}

.page-about .ab-hero h1 {
  font-size: clamp(2.15rem, 8.6vw, 5.5rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
  max-width: 14em;
}

.page-about .ab-hero__lead {
  margin-top: 20px;
  max-width: 36em;
  font-size: var(--fs-17);
  line-height: 1.78;
  color: var(--ink);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .ab-facts {
  background: var(--mist);
  border: 1px solid rgba(20, 32, 26, 0.1);
  border-radius: var(--r-lg);
  padding: 22px;
  box-shadow: var(--shadow-lift);
}

.page-about .ab-facts__cap {
  color: var(--skin);
  margin-bottom: 6px;
}

.page-about .ab-facts__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  padding: 14px 0;
  border-top: 1px dashed rgba(20, 32, 26, 0.2);
}

.page-about .ab-facts__row:first-of-type {
  border-top: 0;
}

.page-about .ab-facts__value {
  font-family: var(--font-mono);
  font-size: var(--fs-21);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  white-space: nowrap;
}

.page-about .ab-facts__label {
  flex: 1 1 12em;
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--slate);
}

/* ---------- 通用区块 ---------- */
.page-about .ab-section {
  padding: 46px 0;
}

.page-about .ab-section--tight {
  padding: 30px 0;
}

.page-about .ab-head {
  display: grid;
  gap: 12px;
  margin-bottom: 26px;
}

.page-about .ab-head h2 {
  font-size: clamp(1.55rem, 5.2vw, 2.75rem);
  max-width: 18em;
}

.page-about .ab-head__note {
  max-width: 34em;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--slate);
}

.page-about .ab-p {
  max-width: 38em;
  font-size: var(--fs-17);
  line-height: 1.8;
  color: var(--ink);
}

.page-about .ab-p + .ab-p {
  margin-top: 16px;
}

.page-about .ab-p a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .ab-side-note {
  display: none;
}

/* ---------- 为什么做这个入口 ---------- */
.page-about .ab-why {
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper-deep) 100%);
}

.page-about .ab-why__body h2 {
  font-size: clamp(1.55rem, 5.2vw, 2.6rem);
  margin-bottom: 20px;
  max-width: 16em;
}

/* ---------- 时间轴 ---------- */
.page-about .ab-journey__grid {
  display: grid;
  gap: 32px;
}

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

.page-about .ab-stage {
  position: relative;
  padding-left: 46px;
  padding-bottom: 16px;
}

.page-about .ab-stage::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 40px;
  bottom: -4px;
  border-left: 2px dashed rgba(62, 122, 34, 0.42);
}

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

.page-about .ab-stage__dot {
  position: absolute;
  left: 0;
  top: 12px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--flesh);
  border: 2px solid var(--ink);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--ink);
  transition: transform 0.24s var(--ease-out);
}

.page-about .ab-stage:hover .ab-stage__dot,
.page-about .ab-stage details[open] + .ab-stage__dot {
  transform: scale(1.12);
}

.page-about .ab-stage__summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  padding: 14px 18px;
  border-radius: var(--r-card);
  background: var(--paper-deep);
  border: 1px solid var(--line-soft);
  transition: background 0.2s var(--ease-out);
}

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

.page-about .ab-stage__summary:hover,
.page-about .ab-stage details[open] .ab-stage__summary {
  background: var(--mist);
}

.page-about .ab-stage__tag {
  color: var(--flesh-deep);
}

.page-about .ab-stage__title {
  font-size: var(--fs-21);
  flex: 1 1 12em;
}

.page-about .ab-stage__body {
  padding: 14px 4px 6px;
}

.page-about .ab-stage__body p {
  max-width: 36em;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--ink);
}

.page-about .ab-stage__body p + p {
  margin-top: 10px;
}

.page-about .ab-journey__aside {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .ab-aside-card {
  background: var(--mist);
  border-radius: var(--r-card);
  padding: 20px;
  border-left: 6px solid var(--flesh);
}

.page-about .ab-aside-card p + p {
  margin-top: 8px;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--ink);
}

.page-about .ab-aside-card .label-caps {
  color: var(--skin);
}

/* ---------- 图片容器 ---------- */
.page-about .ab-media {
  position: relative;
  margin: 0;
  border-radius: var(--r-card);
  overflow: hidden;
  background: linear-gradient(160deg, var(--night-2), var(--night));
}

.page-about .ab-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .ab-media--tall {
  aspect-ratio: 3 / 2;
}

.page-about .ab-media--square {
  aspect-ratio: 4 / 3;
}

.page-about .ab-media--banner {
  aspect-ratio: 14 / 9;
  margin-bottom: 30px;
  clip-path: polygon(0 0, 100% 0, 100% 94%, 0 100%);
  border-radius: var(--r-lg);
}

.page-about .ab-media__caption {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 12px;
  padding: 8px 14px;
  border-radius: var(--r-pill);
  background: rgba(13, 27, 42, 0.78);
  color: var(--paper);
  font-size: var(--fs-12);
  line-height: 1.5;
  letter-spacing: 0.01em;
}

/* ---------- 团队 ---------- */
.page-about .ab-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 22px;
}

.page-about .ab-chip {
  font-family: var(--font-sans);
  font-size: var(--fs-14);
  padding: 8px 18px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(20, 32, 26, 0.18);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: background 0.18s var(--ease-out), color 0.18s var(--ease-out);
}

.page-about .ab-chip:hover {
  background: var(--mist);
}

.page-about .ab-chip[aria-pressed="true"] {
  background: var(--flesh-deep);
  border-color: var(--flesh-deep);
  color: var(--paper);
}

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

.page-about .ab-role {
  padding: 22px;
  border-radius: var(--r-card);
  background: var(--paper-deep);
  border-top: 6px solid var(--flesh);
  transition: transform 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out);
}

.page-about .ab-role:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
}

.page-about .ab-role__label {
  color: var(--skin);
}

.page-about .ab-role__title {
  font-size: var(--fs-21);
  margin-top: 8px;
}

.page-about .ab-role__list {
  margin: 12px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}

.page-about .ab-role__list li {
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--ink);
}

.page-about .ab-role__list li::marker {
  color: var(--flesh-deep);
}

.page-about .ab-flow {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-flow li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--r-sm);
  background: var(--mist);
  font-size: var(--fs-14);
  line-height: 1.6;
}

.page-about .ab-flow__num {
  font-size: var(--fs-12);
  font-weight: 700;
  color: var(--flesh-deep);
}

/* ---------- 停顿带 ---------- */
.page-about .ab-pause {
  padding: 26px 0;
  background: rgba(142, 198, 63, 0.16);
  border-top: 1px solid rgba(62, 122, 34, 0.24);
  border-bottom: 1px solid rgba(62, 122, 34, 0.24);
}

.page-about .ab-pause p {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.02em;
  color: var(--flesh-deep);
}

/* ---------- 合作来源 ---------- */
.page-about .ab-partners__grid {
  display: grid;
  gap: 26px;
}

.page-about .ab-partners h2 {
  font-size: clamp(1.55rem, 5.2vw, 2.6rem);
  margin-bottom: 18px;
  max-width: 14em;
}

.page-about .ab-partners__panel {
  background: var(--paper-deep);
  border-radius: var(--r-lg);
  padding: 24px;
  border: 1px solid var(--line-soft);
}

.page-about .ab-partners__panel .label-caps {
  color: var(--skin);
  margin-bottom: 14px;
}

.page-about .ab-source-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .ab-source-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: var(--fs-14);
  line-height: 1.7;
  padding-bottom: 14px;
  border-bottom: 1px dashed rgba(20, 32, 26, 0.16);
}

.page-about .ab-source-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .ab-source-list__k {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--flesh);
  color: var(--ink);
  font-size: var(--fs-12);
  font-weight: 700;
}

/* ---------- 数字面板 ---------- */
.page-about .ab-night-panel {
  border-radius: var(--r-lg);
  padding: 28px 22px 32px;
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(142, 198, 63, 0.18), transparent 60%),
    var(--night);
  color: var(--paper);
}

.page-about .ab-night-panel__head {
  margin-bottom: 24px;
}

.page-about .ab-night-panel__head .label-caps {
  color: var(--flesh-soft);
}

.page-about .ab-night-panel h2 {
  margin-top: 8px;
  font-size: clamp(1.45rem, 4.6vw, 2.35rem);
  color: var(--paper);
}

.page-about .ab-milestones {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 16px;
}

.page-about .ab-milestone {
  padding-top: 16px;
  border-top: 1px solid rgba(246, 247, 236, 0.22);
}

.page-about .ab-milestone__value {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 7vw, 3.2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--flesh);
}

.page-about .ab-milestone__label {
  margin-top: 8px;
  font-size: var(--fs-12);
  line-height: 1.6;
  color: rgba(246, 247, 236, 0.8);
}

/* ---------- 连续性 ---------- */
.page-about .ab-continuity__grid {
  display: grid;
  gap: 26px;
}

.page-about .ab-continuity h2 {
  font-size: clamp(1.55rem, 5.2vw, 2.6rem);
  margin-bottom: 18px;
  max-width: 14em;
}

.page-about .ab-continuity .btn {
  margin-top: 22px;
  display: inline-block;
}

/* ---------- 接下来 ---------- */
.page-about .ab-next {
  background: var(--paper-deep);
  border-top: 1px solid var(--line);
}

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

.page-about .ab-next h2 {
  font-size: clamp(1.55rem, 5.2vw, 2.6rem);
  margin-bottom: 18px;
  max-width: 14em;
}

.page-about .ab-next__note {
  background: var(--paper);
  border-radius: var(--r-card);
  padding: 20px;
  border-left: 6px solid var(--yellow);
}

.page-about .ab-next__note .label-caps {
  color: var(--skin);
  margin-bottom: 8px;
}

.page-about .ab-next__note p:last-child {
  font-size: var(--fs-14);
  line-height: 1.75;
}

/* ---------- 目录 ---------- */
.page-about .ab-directory__title {
  font-size: var(--fs-21);
  margin-bottom: 16px;
}

.page-about .ab-directory {
  display: grid;
  gap: 10px;
}

.page-about .ab-directory__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 14px;
  align-items: baseline;
  padding: 16px 18px;
  border-radius: var(--r-card);
  background: var(--mist);
  border: 1px solid rgba(20, 32, 26, 0.08);
  color: var(--ink);
  text-decoration: none;
  transition: transform 0.2s var(--ease-out), background 0.2s var(--ease-out);
}

.page-about .ab-directory__item:hover,
.page-about .ab-directory__item:focus-visible {
  transform: translateY(-3px);
  background: var(--paper-deep);
}

.page-about .ab-directory__num {
  font-size: var(--fs-14);
  font-weight: 700;
  color: var(--flesh-deep);
  grid-row: 1 / span 2;
}

.page-about .ab-directory__label {
  font-size: var(--fs-17);
  font-weight: 800;
}

.page-about .ab-directory__desc {
  font-size: var(--fs-12);
  line-height: 1.6;
  color: var(--slate);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .ab-section {
    padding: 64px 0;
  }

  .page-about .ab-section--tight {
    padding: 36px 0;
  }

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

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

  .page-about .ab-flow li {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }

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

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

  .page-about .ab-night-panel {
    padding: 36px 32px 40px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero {
    padding: 26px 0 72px;
  }

  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.95fr);
    align-items: end;
    gap: 48px;
  }

  .page-about .ab-hero__lead {
    margin-top: 24px;
  }

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

  .page-about .ab-why__grid {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }

  .page-about .ab-side-note {
    display: block;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: 0.3em;
    font-size: 11px;
    text-transform: uppercase;
    color: var(--slate);
    margin: 0;
    padding-top: 6px;
  }

  .page-about .ab-section {
    padding: 80px 0;
  }

  .page-about .ab-head {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: end;
    gap: 32px;
  }

  .page-about .ab-journey__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
    gap: 56px;
    align-items: start;
  }

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

  .page-about .ab-partners__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .ab-continuity__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 48px;
    align-items: center;
  }

  .page-about .ab-next__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    gap: 48px;
    align-items: start;
  }

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

  .page-about .ab-directory__item {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 20px;
  }

  .page-about .ab-directory__num {
    grid-row: auto;
  }

  .page-about .ab-pause {
    padding: 30px 0;
  }
}
<<<PAGE_CSS_END>>>
</main>