.page-about {
  --ab-line: rgba(11, 31, 18, .12);
  --ab-ink: #1a2f20;
  background: var(--frost);
  color: var(--seed);
  overflow-x: hidden;
}

/* ---------- Hero ---------- */
.page-about .ab-hero {
  position: relative;
  padding: 28px 0 30px;
  border-bottom: 1px solid var(--ab-line);
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  width: 96px;
  height: 4px;
  background: var(--orange);
}

.page-about .ab-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--flesh);
}

.page-about .ab-hero__kicker::before {
  content: "";
  width: 10px;
  height: 10px;
  background: var(--lime);
  border-radius: 50%;
}

.page-about .ab-hero h1 {
  margin: 0;
  max-width: 17ch;
  font-size: clamp(2rem, 7.2vw, 4.2rem);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.02em;
}

.page-about .ab-hero__lead {
  margin: 20px 0 0;
  max-width: 58ch;
  font-size: .98rem;
  line-height: 1.85;
  color: var(--ab-ink);
}

.page-about .ab-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 34px;
  margin: 26px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--ab-line);
}

.page-about .ab-stat {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding-left: 14px;
}

.page-about .ab-stat::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  bottom: 4px;
  width: 3px;
  background: var(--lime);
}

.page-about .ab-stat__n {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--flesh);
}

.page-about .ab-stat__l {
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--mist);
}

/* ---------- 主体与右侧轨道 ---------- */
.page-about .ab-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  column-gap: 0;
}

.page-about .ab-main {
  min-width: 0;
}

.page-about .ab-track {
  display: none;
}

@media (min-width: 980px) {
  .page-about .ab-body {
    grid-template-columns: minmax(0, 1fr) 54px;
    column-gap: 34px;
  }

  .page-about .ab-track {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    align-self: start;
    position: sticky;
    top: calc(var(--top-h) + 28px);
    height: calc(100vh - var(--top-h) - 60px);
    padding: 26px 0 0;
  }

  .page-about .ab-track__line {
    position: relative;
    flex: 0 0 auto;
    width: 3px;
    height: 140px;
    background: rgba(11, 31, 18, .14);
    overflow: hidden;
  }

  .page-about .ab-track__fill {
    display: block;
    width: 100%;
    height: 0;
    background: var(--lime);
  }

  .page-about .ab-track__label {
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: .66rem;
    letter-spacing: .26em;
    white-space: nowrap;
    color: var(--mist);
  }
}

/* ---------- 章节 ---------- */
.page-about .ab-sec {
  padding: 40px 0;
  border-top: 1px solid var(--ab-line);
}

.page-about .ab-main > .ab-sec:first-child {
  border-top: 0;
}

.page-about .ab-sec__head {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 20px;
}

.page-about .ab-sec__head .sec-no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 6vw, 2.9rem);
  font-weight: 900;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(31, 122, 61, .5);
}

.page-about .ab-sec__title {
  margin: 0;
  font-size: clamp(1.32rem, 4.4vw, 1.9rem);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -.01em;
  color: var(--seed);
}

@media (min-width: 600px) {
  .page-about .ab-sec__head {
    flex-direction: row;
    align-items: baseline;
    gap: 16px;
  }
}

.page-about .ab-p {
  margin: 0 0 14px;
  max-width: 64ch;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--ab-ink);
}

.page-about .ab-p--tail {
  margin-top: 16px;
  margin-bottom: 0;
  padding-left: 14px;
  border-left: 3px solid var(--lime);
  color: var(--deep);
}

.page-about .ab-p a {
  color: var(--flesh);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.page-about .ab-p a:hover {
  color: var(--orange);
}

/* ---------- 两栏交替 ---------- */
.page-about .ab-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin-top: 8px;
}

.page-about .ab-split__text,
.page-about .ab-split__media {
  min-width: 0;
}

@media (min-width: 820px) {
  .page-about .ab-split {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px;
    align-items: start;
  }

  .page-about .ab-split--flip .ab-split__media {
    order: -1;
  }
}

.page-about .ab-split__media .media {
  margin: 0;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .ab-wide {
  margin: 0 0 20px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

/* ---------- 坐标条 ---------- */
.page-about .ab-coord {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .ab-coord__i {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  padding: 10px 14px;
  background: var(--white);
  border-left: 3px solid var(--lime);
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .ab-coord__i:hover {
  background: var(--leaf);
  transform: translateY(-2px);
}

.page-about .ab-coord__k {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-about .ab-coord__v {
  font-size: .9rem;
  line-height: 1.6;
  color: var(--seed);
}

/* ---------- 团队 ---------- */
.page-about .ab-team__bar {
  display: flex;
  gap: 3px;
  height: 54px;
  margin: 0 0 18px;
}

.page-about .ab-team__seg {
  display: flex;
  align-items: flex-end;
  padding: 6px 7px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: .74rem;
  font-weight: 700;
  color: var(--frost);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: transform var(--dur) var(--ease), filter var(--dur) var(--ease);
}

.page-about .ab-team__seg:hover {
  transform: translateY(-4px);
  filter: brightness(1.12);
}

.page-about .ab-team__seg--c { flex: 12 1 0; background: var(--flesh); }
.page-about .ab-team__seg--d { flex: 8 1 0; background: var(--bright); color: var(--seed); }
.page-about .ab-team__seg--o { flex: 10 1 0; background: var(--deep); }
.page-about .ab-team__seg--s { flex: 6 1 0; background: var(--orange); }

.page-about .ab-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-about .ab-team__item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 12px 14px;
  background: var(--white);
  border-left: 4px solid var(--flesh);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .ab-team__item:hover {
  transform: translateY(-3px);
  background: var(--leaf);
}

.page-about .ab-team__item--d { border-left-color: var(--bright); }
.page-about .ab-team__item--o { border-left-color: var(--deep); }
.page-about .ab-team__item--s { border-left-color: var(--orange); }

.page-about .ab-team__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--flesh);
}

.page-about .ab-team__name {
  margin: 0 0 3px;
  font-size: .95rem;
  font-weight: 800;
  color: var(--seed);
}

.page-about .ab-team__desc {
  margin: 0;
  font-size: .86rem;
  line-height: 1.7;
  color: var(--ab-ink);
}

/* ---------- 流程 ---------- */
.page-about .ab-flow {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
}

.page-about .ab-flow__step {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 0;
  border-top: 1px dashed var(--ab-line);
}

.page-about .ab-flow__step:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .ab-flow__no {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: .8rem;
  font-weight: 700;
  color: var(--orange);
}

.page-about .ab-flow__t {
  margin: 0 0 4px;
  font-size: .95rem;
  font-weight: 800;
  color: var(--seed);
}

.page-about .ab-flow__d {
  margin: 0;
  max-width: 60ch;
  font-size: .88rem;
  line-height: 1.75;
  color: var(--ab-ink);
}

/* ---------- 点位 ---------- */
.page-about .ab-geo {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .ab-geo__row {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 12px;
  padding: 11px 14px;
  background: rgba(255, 255, 255, .78);
  border-left: 3px solid var(--bright);
  transition: background var(--dur) var(--ease);
}

.page-about .ab-geo__row:hover {
  background: var(--white);
}

.page-about .ab-geo__k {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--flesh);
  padding-top: 2px;
}

.page-about .ab-geo__v {
  font-size: .88rem;
  line-height: 1.7;
  color: var(--ab-ink);
}

/* ---------- 时间轴 ---------- */
.page-about .ab-tl {
  list-style: none;
  margin: 20px 0 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-about .ab-tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(var(--lime), rgba(168, 245, 59, .12));
}

.page-about .ab-tl__item {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px 14px;
  padding: 0 0 18px;
  outline: none;
}

.page-about .ab-tl__dot {
  position: absolute;
  left: -26px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--lime);
  border: 2px solid var(--frost);
  box-shadow: 0 0 0 2px rgba(168, 245, 59, .45);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .ab-tl__season {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--deep);
}

.page-about .ab-tl__card {
  padding: 10px 14px;
  background: rgba(255, 255, 255, .62);
  border-left: 3px solid rgba(31, 122, 61, .55);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .ab-tl__tag {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .12em;
  color: var(--flesh);
}

.page-about .ab-tl__body {
  margin: 0;
  font-size: .87rem;
  line-height: 1.72;
  color: var(--ab-ink);
}

.page-about .ab-tl__item:hover .ab-tl__card,
.page-about .ab-tl__item:focus-visible .ab-tl__card {
  transform: translateX(4px);
  background: var(--white);
  border-left-color: var(--lime);
}

.page-about .ab-tl__item:hover .ab-tl__dot,
.page-about .ab-tl__item:focus-visible .ab-tl__dot {
  transform: scale(1.3);
  background: var(--orange);
}

.page-about .ab-tl__item:focus-visible {
  box-shadow: 0 0 0 2px var(--lime);
  border-radius: 4px;
}

/* ---------- 合作伙伴 ---------- */
.page-about .ab-partner {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .ab-partner__i {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 10px 13px;
  background: var(--white);
  border-bottom: 2px solid var(--leaf);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .ab-partner__i:hover {
  border-bottom-color: var(--orange);
  transform: translateY(-2px);
}

.page-about .ab-partner__t {
  font-size: .85rem;
  font-weight: 800;
  color: var(--flesh);
}

.page-about .ab-partner__d {
  font-size: .85rem;
  line-height: 1.65;
  color: var(--ab-ink);
}

/* ---------- 响应节奏 ---------- */
.page-about .ab-sla {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-sla__i {
  display: grid;
  gap: 3px;
  padding: 12px 14px;
  background: var(--white);
  border-left: 3px solid var(--flesh);
  transition: background var(--dur) var(--ease);
}

.page-about .ab-sla__i:hover {
  background: var(--leaf);
}

.page-about .ab-sla--side .ab-sla__i {
  border-left-color: var(--orange);
  background: rgba(255, 255, 255, .8);
}

.page-about .ab-sla__n {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: .95rem;
  font-weight: 700;
  color: var(--deep);
}

.page-about .ab-sla__d {
  font-size: .85rem;
  line-height: 1.7;
  color: var(--ab-ink);
}

/* ---------- 收尾 CTA ---------- */
.page-about .ab-cta {
  margin: 34px 0 52px;
  padding: 30px 22px;
  background-color: var(--deep);
  background-image:
    linear-gradient(rgba(168, 245, 59, .09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168, 245, 59, .09) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--frost);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-about .ab-cta__t {
  margin: 0 0 10px;
  font-size: clamp(1.25rem, 4.4vw, 1.75rem);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--frost);
}

.page-about .ab-cta__d {
  margin: 0 0 20px;
  max-width: 52ch;
  font-size: .9rem;
  line-height: 1.8;
  color: rgba(244, 255, 232, .82);
}

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

@media (min-width: 720px) {
  .page-about .ab-cta {
    padding: 40px 38px;
    margin-bottom: 64px;
  }
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .ab-coord__i,
  .page-about .ab-team__seg,
  .page-about .ab-team__item,
  .page-about .ab-partner__i,
  .page-about .ab-tl__card,
  .page-about .ab-tl__dot {
    transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
  }

  .page-about .ab-coord__i:hover,
  .page-about .ab-team__seg:hover,
  .page-about .ab-team__item:hover,
  .page-about .ab-partner__i:hover,
  .page-about .ab-tl__item:hover .ab-tl__card,
  .page-about .ab-tl__item:focus-visible .ab-tl__card,
  .page-about .ab-tl__item:hover .ab-tl__dot,
  .page-about .ab-tl__item:focus-visible .ab-tl__dot {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>