.page-about {
  --ab-rail-w: 190px;
  --ab-gap: clamp(52px, 8vw, 96px);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  overflow-x: clip;
}

.page-about .ab-intro {
  position: relative;
  padding-block: clamp(22px, 4vw, 38px) clamp(34px, 6vw, 64px);
}

.page-about .ab-intro::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--orange) 0%, rgba(255, 106, 23, 0.12) 42%, transparent 78%);
}

.page-about .ab-intro__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 5vw, 52px);
  align-items: end;
  margin-top: clamp(18px, 3vw, 32px);
}

@media (min-width: 940px) {
  .page-about .ab-intro__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

.page-about .ab-intro__eyebrow {
  color: var(--orange);
  margin: 0;
}

.page-about .ab-intro__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.6vw, 58px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--deep);
  margin: 14px 0 0;
}

.page-about .ab-intro__text {
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.82;
  color: var(--ink);
  max-width: 62ch;
  margin: 20px 0 0;
}

.page-about .ab-intro__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .ab-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 16px 14px;
  border: var(--rule);
  border-radius: var(--radius-s);
  background: var(--plate-paper);
  box-shadow: var(--shadow-plate);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .ab-fact:nth-child(odd) {
  transform: rotate(-1.2deg);
}

.page-about .ab-fact:nth-child(even) {
  transform: rotate(1deg);
}

.page-about .ab-fact:hover {
  transform: rotate(0deg) translateY(-4px);
  box-shadow: 0 28px 54px -34px rgba(6, 22, 39, 0.62);
}

.page-about .ab-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.2vw, 38px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--deep);
}

.page-about .ab-fact__label {
  font-size: 13px;
  line-height: 1.4;
  color: var(--ink);
}

/* ===== 主体双栏 ===== */
.page-about .ab-main {
  padding-block: clamp(34px, 6vw, 68px) clamp(56px, 9vw, 112px);
}

.page-about .ab-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 54px);
  align-items: start;
}

@media (min-width: 1024px) {
  .page-about .ab-layout {
    grid-template-columns: var(--ab-rail-w) minmax(0, 1fr);
  }
}

.page-about .ab-rail {
  position: static;
}

@media (min-width: 1024px) {
  .page-about .ab-rail {
    position: sticky;
    top: 96px;
  }
}

.page-about .ab-rail__title {
  color: var(--orange);
  margin: 0 0 10px;
}

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

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

@media (min-width: 1024px) {
  .page-about .ab-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }
}

.page-about .ab-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 13px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  color: var(--ink);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.3;
  white-space: nowrap;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

@media (min-width: 1024px) {
  .page-about .ab-rail__link {
    white-space: normal;
    border-radius: var(--radius-s);
  }
}

.page-about .ab-rail__link:hover,
.page-about .ab-rail__link:focus-visible {
  background: var(--mist);
  border-color: var(--steel);
  color: var(--deep);
}

.page-about .ab-rail__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--orange);
}

.page-about .ab-body {
  display: grid;
  min-width: 0;
}

.page-about .ab-chapter {
  padding-block: var(--ab-gap);
  border-top: var(--rule);
  min-width: 0;
}

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

.page-about .ab-chapter__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(12px, 2vw, 20px);
  align-items: baseline;
  margin-bottom: clamp(20px, 3.4vw, 34px);
}

.page-about .ab-chapter__no {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--orange);
  padding-top: 6px;
}

.page-about .ab-chapter__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 3.4vw, 40px);
  line-height: 1.18;
  letter-spacing: -0.005em;
  color: var(--deep);
  margin: 0;
}

.page-about .ab-lede {
  font-size: clamp(16px, 1.55vw, 17.5px);
  line-height: 1.8;
  max-width: 64ch;
  margin: 0 0 clamp(24px, 4vw, 40px);
}

/* ===== 阶段轨道 ===== */
.page-about .ab-track {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  padding: 6px 2px 20px;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-track::-webkit-scrollbar {
  height: 6px;
}

.page-about .ab-track::-webkit-scrollbar-thumb {
  background: var(--steel);
  border-radius: var(--radius-pill);
}

.page-about .ab-stage {
  flex: 0 0 min(292px, 80vw);
  scroll-snap-align: start;
  border: var(--rule);
  border-radius: var(--radius-m);
  background: var(--plate-paper);
  box-shadow: var(--shadow-plate);
  overflow: hidden;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .ab-stage:hover {
  transform: translateY(-4px);
  border-color: var(--orange);
  box-shadow: 0 30px 56px -34px rgba(6, 22, 39, 0.6);
}

.page-about .ab-stage__trigger {
  display: block;
  width: 100%;
  padding: 20px 20px 16px;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
  font: inherit;
  color: inherit;
}

.page-about .ab-stage__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 40px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--orange);
}

.page-about .ab-stage__season {
  display: block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--forest);
}

.page-about .ab-stage__name {
  display: block;
  margin-top: 6px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--deep);
}

.page-about .ab-stage__hint {
  display: inline-block;
  margin-top: 14px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ink);
  border-bottom: 1px solid var(--steel);
  padding-bottom: 2px;
}

.page-about .ab-stage[data-open] .ab-stage__hint {
  opacity: 0;
}

.page-about .ab-stage__inner {
  padding: 0 20px 20px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink);
  border-top: 1px dashed var(--steel);
  padding-top: 14px;
}

.page-about .ab-stage__inner p {
  margin: 0;
}

/* ===== 团队 ===== */
.page-about .ab-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

@media (min-width: 940px) {
  .page-about .ab-team {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }
}

.page-about .ab-team__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

.page-about .ab-team__stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  border-left: 3px solid var(--orange);
  background: var(--mist);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
}

.page-about .ab-team__statnum {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--deep);
}

.page-about .ab-team__statlabel {
  font-size: 13px;
  color: var(--ink);
}

.page-about .ab-team__body p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.82;
  color: var(--ink);
}

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

.page-about .ab-team__media {
  margin: 0;
}

.page-about .ab-team__media .frame {
  border: var(--rule);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--mist);
}

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

/* ===== 深色复核区 ===== */
.page-about .ab-chapter--deep {
  border-top: 0;
  margin-block: clamp(36px, 6vw, 72px);
  padding: clamp(28px, 5vw, 54px);
  border-radius: var(--radius-l);
  background:
    radial-gradient(120% 92% at 88% 6%, rgba(255, 106, 23, 0.18), transparent 58%),
    linear-gradient(155deg, var(--deep) 0%, var(--abyss) 100%);
  color: var(--mist);
  box-shadow: var(--shadow-deep);
}

.page-about .ab-chapter--deep .ab-chapter__title {
  color: var(--paper);
}

.page-about .ab-chapter--deep .ab-chapter__no {
  color: var(--neon);
}

.page-about .ab-lede--onDark {
  color: rgba(232, 239, 247, 0.86);
  margin-bottom: clamp(26px, 4vw, 40px);
}

.page-about .ab-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 24px;
}

.page-about .ab-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 18px;
  padding-left: 18px;
  border-left: 2px solid rgba(60, 255, 166, 0.42);
}

.page-about .ab-step__no {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 34px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--neon);
}

.page-about .ab-step__title {
  margin: 0;
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .ab-step__text {
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(232, 239, 247, 0.84);
  max-width: 62ch;
}

.page-about .ab-review__figure {
  margin: clamp(26px, 4vw, 40px) 0 0;
}

.page-about .ab-review__figure .frame {
  border-radius: var(--radius-m);
  overflow: hidden;
  border: 1px solid rgba(60, 255, 166, 0.24);
}

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

.page-about .ab-chapter--deep .caption {
  color: rgba(232, 239, 247, 0.66);
  border-left-color: var(--neon);
}

/* ===== 覆盖版图 ===== */
.page-about .ab-reach {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-reach__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding-block: clamp(20px, 3.2vw, 32px);
  border-top: var(--rule);
}

.page-about .ab-reach__row:last-child {
  border-bottom: var(--rule);
}

@media (min-width: 760px) {
  .page-about .ab-reach__row {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 10px 36px;
    align-items: baseline;
  }
}

.page-about .ab-reach__num {
  font-family: var(--font-mono);
  font-size: clamp(42px, 7vw, 70px);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--deep);
  display: inline-block;
  padding-bottom: 4px;
  background-image: linear-gradient(transparent 68%, rgba(255, 106, 23, 0.26) 68%);
  background-repeat: no-repeat;
  background-size: 100% 100%;
}

.page-about .ab-reach__body h3 {
  margin: 0 0 8px;
  font-size: clamp(16px, 1.8vw, 18px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--deep);
}

.page-about .ab-reach__body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--ink);
  max-width: 62ch;
}

.page-about .ab-reach__body a {
  color: var(--forest);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ===== 协作 ===== */
.page-about .ab-partner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

@media (min-width: 940px) {
  .page-about .ab-partner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

.page-about .ab-partner__text p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.82;
  color: var(--ink);
}

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

.page-about .ab-partner__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: var(--rule);
}

.page-about .ab-partner__stats li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-block: 16px;
  border-bottom: var(--rule);
}

.page-about .ab-partner__n {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 32px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--orange);
  min-width: 2.2em;
}

.page-about .ab-partner__t {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink);
}

.page-about .ab-partner__figure {
  margin: clamp(28px, 4.4vw, 44px) 0 0;
}

.page-about .ab-partner__figure .frame {
  border: var(--rule);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--mist);
}

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

/* ===== 服务 ===== */
.page-about .ab-service {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 44px);
  padding: clamp(24px, 4vw, 40px);
  border: var(--rule);
  border-radius: var(--radius-m);
  background: var(--mist);
}

@media (min-width: 900px) {
  .page-about .ab-service {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }
}

.page-about .ab-service__col p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--ink);
}

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

.page-about .ab-service__sub {
  margin: 0 0 14px;
  font-size: 16px;
  font-weight: 700;
  color: var(--deep);
}

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

.page-about .ab-service__list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .ab-service__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 9px;
  height: 2px;
  background: var(--orange);
}

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

/* ===== 收束 ===== */
.page-about .ab-closer {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  margin-top: clamp(48px, 8vw, 88px);
  padding-top: clamp(26px, 4vw, 40px);
  border-top: var(--rule);
}

@media (min-width: 760px) {
  .page-about .ab-closer {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 28px;
  }
}

.page-about .ab-closer__num {
  font-family: var(--font-mono);
  font-size: clamp(72px, 13vw, 150px);
  line-height: 0.86;
  letter-spacing: -0.02em;
  color: var(--deep);
  background-image: linear-gradient(160deg, var(--deep) 0%, var(--mid) 62%, var(--orange) 130%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-about .ab-closer__text {
  margin: 0;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
  color: var(--ink);
  max-width: 46ch;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-fact,
  .page-about .ab-stage {
    transition: none;
  }
  .page-about .ab-fact:nth-child(odd),
  .page-about .ab-fact:nth-child(even) {
    transform: none;
  }
}
<<<END>>>