.page-about {
  --ab-soft: rgba(34, 50, 43, 0.74);
  --ab-shadow: 6px 6px 0 rgba(34, 50, 43, 0.18);
  --ab-shadow-lg: 8px 8px 0 rgba(6, 26, 43, 0.55);
  --ab-track-x: 26px;
  background: var(--bone);
  color: var(--ink);
  overflow-x: hidden;
}

.page-about .ab-sec {
  padding: clamp(48px, 8vw, 88px) 0;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  background: var(--navy);
  color: var(--bone);
  padding: clamp(20px, 4vw, 34px) 0 clamp(80px, 10vw, 124px);
  overflow: hidden;
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: -12%;
  width: 52%;
  height: 100%;
  background: var(--blue);
  opacity: 0.5;
  clip-path: polygon(24% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 60px;
  background: var(--bone);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
  z-index: 1;
  pointer-events: none;
}

.page-about .ab-hero__crumbs {
  position: relative;
  z-index: 2;
  margin-bottom: clamp(20px, 4vw, 36px);
}

.page-about .ab-hero__crumbs .crumbs,
.page-about .ab-hero__crumbs .crumbs__link {
  color: var(--line);
}

.page-about .ab-hero__crumbs .crumbs__link[aria-current="page"] {
  color: var(--lime);
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 2;
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-about .ab-hero__text .title-xl {
  font-size: clamp(30px, 6.2vw, 58px);
  line-height: 1.08;
  letter-spacing: 0.02em;
  margin: 14px 0 0;
  color: var(--concrete);
}

.page-about .ab-hero__lede {
  margin: clamp(16px, 3vw, 24px) 0 0;
  max-width: 56ch;
  color: rgba(231, 233, 226, 0.88);
  font-size: clamp(15px, 1.6vw, 17px);
}

.page-about .ab-hero__facts {
  list-style: none;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(182, 255, 46, 0.28);
  border-top: 3px solid var(--lime);
  border-bottom: 3px solid var(--lime);
}

.page-about .ab-hero__fact {
  background: var(--navy);
  padding: 14px 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .ab-hero__num {
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1;
  color: var(--lime);
  font-weight: 700;
}

.page-about .ab-hero__unit {
  font-size: 0.5em;
  margin-left: 2px;
}

.page-about .ab-hero__lab {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--line);
}

.page-about .ab-hero__media {
  position: relative;
  margin: 0;
  border: var(--border) solid var(--lime);
  box-shadow: var(--ab-shadow-lg);
  overflow: hidden;
  background: var(--navy-2);
}

.page-about .ab-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(182, 255, 46, 0.16) 0 1px, transparent 1px 46px),
    repeating-linear-gradient(0deg, rgba(182, 255, 46, 0.16) 0 1px, transparent 1px 46px);
  pointer-events: none;
}

.page-about .ab-hero__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.06);
}

/* ---------- 区块标题行 ---------- */
.page-about .ab-head {
  display: grid;
  gap: 14px;
  margin-bottom: clamp(28px, 5vw, 46px);
}

.page-about .ab-head .title-lg,
.page-about .ab-head .title-md {
  margin: 12px 0 0;
  line-height: 1.14;
  letter-spacing: 0.02em;
}

.page-about .ab-head__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ab-soft);
  max-width: 42ch;
}

.page-about .ab-head--dark .title-lg,
.page-about .ab-head--dark .title-md {
  color: var(--concrete);
}

.page-about .ab-head--dark .ab-head__note {
  color: rgba(231, 233, 226, 0.76);
}

.page-about .ab-head--dark .eyebrow {
  color: var(--lime);
}

/* ---------- 时间线 ---------- */
.page-about .ab-road {
  background: var(--bone);
}

.page-about .ab-track {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--ab-track-x);
}

.page-about .ab-track::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 3px;
  background: linear-gradient(180deg, var(--lime) 0%, var(--lime-2) 34%, var(--blue) 100%);
}

.page-about .ab-track__item {
  position: relative;
  padding: 0 0 18px;
  outline: none;
}

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

.page-about .ab-track__dot {
  position: absolute;
  left: -25px;
  top: 26px;
  width: 17px;
  height: 17px;
  background: var(--lime);
  border: 3px solid var(--navy);
  box-sizing: border-box;
  z-index: 1;
  transition: background-color 160ms ease, transform 160ms ease;
}

.page-about .ab-track__box {
  position: relative;
  background: var(--concrete);
  border: var(--border) solid var(--ink);
  box-shadow: var(--ab-shadow);
  padding: clamp(16px, 3vw, 26px);
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.page-about .ab-track__item:hover .ab-track__box,
.page-about .ab-track__item:focus-visible .ab-track__box,
.page-about .ab-track__item:focus-within .ab-track__box {
  transform: translateY(-4px);
  border-color: var(--lime-2);
  box-shadow: 6px 10px 0 rgba(34, 50, 43, 0.24);
}

.page-about .ab-track__item:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 4px;
}

.page-about .ab-track__item:hover .ab-track__dot,
.page-about .ab-track__item:focus-visible .ab-track__dot {
  background: var(--orange);
}

.page-about .ab-track__year {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--navy);
  background: var(--lime);
  border: 2px solid var(--navy);
  padding: 3px 8px;
}

.page-about .ab-track__title {
  margin: 12px 0 0;
  font-size: clamp(18px, 2.4vw, 24px);
  line-height: 1.3;
  letter-spacing: 0.015em;
  color: var(--navy);
}

.page-about .ab-track__text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .ab-track__scale {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 2px dashed var(--line);
  font-size: 13px;
  color: var(--ab-soft);
  letter-spacing: 0.02em;
}

.page-about .ab-track__scale-num {
  color: var(--navy);
  font-weight: 700;
  font-size: 16px;
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  background: var(--navy);
  color: var(--bone);
}

.page-about .ab-team__grid {
  display: grid;
  gap: 0;
  border: var(--border) solid var(--navy);
  box-shadow: var(--ab-shadow-lg);
}

.page-about .ab-team__cell {
  padding: clamp(18px, 3vw, 28px);
  border: var(--border) solid var(--navy);
}

.page-about .ab-team__cell--a {
  background: var(--concrete);
  color: var(--ink);
}

.page-about .ab-team__cell--b {
  background: var(--bone);
  color: var(--ink);
}

.page-about .ab-team__cell--c {
  background: var(--blue);
  color: var(--bone);
}

.page-about .ab-team__num {
  display: block;
  font-size: clamp(38px, 6vw, 54px);
  line-height: 1;
  font-weight: 700;
  color: var(--navy);
}

.page-about .ab-team__cell--c .ab-team__num {
  color: var(--lime);
}

.page-about .ab-team__title {
  margin: 12px 0 0;
  font-size: clamp(18px, 2.2vw, 22px);
  letter-spacing: 0.02em;
}

.page-about .ab-team__text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ab-soft);
}

.page-about .ab-team__cell--c .ab-team__text {
  color: rgba(231, 233, 226, 0.82);
}

.page-about .ab-team__text--last {
  color: var(--lime);
}

.page-about .ab-team__cell--c .ab-team__text--last {
  color: var(--lime);
}

.page-about .ab-team__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .ab-team__list li {
  position: relative;
  padding-left: 16px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink);
}

.page-about .ab-team__cell--c .ab-team__list li {
  color: rgba(231, 233, 226, 0.86);
}

.page-about .ab-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 7px;
  height: 7px;
  background: var(--orange);
}

.page-about .ab-team__foot {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .ab-team__figure {
  position: relative;
  margin: 0;
  border: var(--border) solid var(--lime);
  box-shadow: var(--ab-shadow-lg);
  background: var(--navy-2);
}

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

.page-about .ab-team__figure .tag {
  position: absolute;
  left: 12px;
  bottom: 12px;
  background: var(--navy);
  color: var(--lime);
  border: 2px solid var(--lime);
  padding: 4px 9px;
}

.page-about .ab-team__flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(182, 255, 46, 0.24);
  border-top: 3px solid var(--lime);
}

.page-about .ab-team__step {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "num title"
    "num desc";
  gap: 2px 12px;
  background: var(--navy-2);
  padding: 14px 14px;
}

.page-about .ab-team__step-num {
  grid-area: num;
  align-self: center;
  font-size: 20px;
  font-weight: 700;
  color: var(--lime);
}

.page-about .ab-team__step-t {
  grid-area: title;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--concrete);
}

.page-about .ab-team__step-d {
  grid-area: desc;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(231, 233, 226, 0.72);
}

/* ---------- 赛区版图 ---------- */
.page-about .ab-map {
  background: var(--concrete);
}

.page-about .ab-map__grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .ab-map__body .title-lg {
  margin: 12px 0 0;
  line-height: 1.16;
}

.page-about .ab-map__text {
  margin: clamp(14px, 2vw, 20px) 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
  max-width: 62ch;
}

.page-about .ab-map__cities {
  list-style: none;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(94px, 1fr));
  gap: 8px;
}

.page-about .ab-map__city {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px;
  background: var(--bone);
  border: 3px solid var(--ink);
  padding: 10px 10px;
  cursor: default;
  transition: background-color 160ms ease, border-color 160ms ease, transform 160ms ease;
  outline: none;
}

.page-about .ab-map__city:hover,
.page-about .ab-map__city:focus-visible {
  background: var(--navy);
  border-color: var(--lime);
  transform: translateY(-3px);
}

.page-about .ab-map__city:hover .ab-map__city-name,
.page-about .ab-map__city:focus-visible .ab-map__city-name {
  color: var(--concrete);
}

.page-about .ab-map__city:hover .ab-map__city-num,
.page-about .ab-map__city:focus-visible .ab-map__city-num {
  color: var(--lime);
}

.page-about .ab-map__city:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 3px;
}

.page-about .ab-map__city-name {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--navy);
}

.page-about .ab-map__city-num {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .ab-map__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ab-soft);
  max-width: 54ch;
}

.page-about .ab-map__link-line {
  margin: 14px 0 0;
}

.page-about .ab-map__figure {
  position: relative;
  margin: 0;
  border: var(--border) solid var(--ink);
  box-shadow: var(--ab-shadow);
  background: var(--bone);
  align-self: start;
}

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

.page-about .ab-map__figure .tag {
  position: absolute;
  left: 12px;
  bottom: 12px;
  background: var(--navy);
  border: 2px solid var(--orange);
  padding: 4px 9px;
}

/* ---------- 关注位取舍 ---------- */
.page-about .ab-slots {
  background: var(--bone);
}

.page-about .ab-slots__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-about .ab-slots__body .title-lg {
  margin: 12px 0 0;
  line-height: 1.16;
}

.page-about .ab-slots__p {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
  max-width: 58ch;
}

.page-about .ab-slots__body .btn {
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .ab-slots__plate {
  align-self: start;
  background: var(--navy);
  color: var(--bone);
  border: var(--border) solid var(--navy);
  box-shadow: var(--ab-shadow);
  padding: clamp(18px, 3vw, 24px);
}

.page-about .ab-slots__plate-label {
  margin: 0 0 4px;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .ab-slots__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 12px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(191, 198, 187, 0.32);
}

.page-about .ab-slots__row--hl {
  background: rgba(182, 255, 46, 0.1);
  padding-left: 8px;
  padding-right: 8px;
  border-left: 3px solid var(--lime);
}

.page-about .ab-slots__key {
  font-size: 13px;
  color: rgba(231, 233, 226, 0.76);
}

.page-about .ab-slots__val {
  font-size: 16px;
  font-weight: 700;
  color: var(--concrete);
}

.page-about .ab-slots__row--hl .ab-slots__val {
  color: var(--lime);
}

.page-about .ab-slots__plate-note {
  margin: 14px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(231, 233, 226, 0.62);
}

/* ---------- 指标横条 ---------- */
.page-about .ab-metrics {
  background: var(--navy-2);
  color: var(--bone);
  border-top: 3px solid var(--lime);
  border-bottom: 3px solid var(--lime);
  background-image:
    repeating-linear-gradient(90deg, rgba(182, 255, 46, 0.07) 0 1px, transparent 1px 58px),
    repeating-linear-gradient(0deg, rgba(182, 255, 46, 0.07) 0 1px, transparent 1px 58px);
  padding: clamp(40px, 7vw, 76px) 0;
}

.page-about .ab-metrics .ab-head {
  margin-bottom: clamp(22px, 4vw, 34px);
}

.page-about .ab-metrics__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(182, 255, 46, 0.26);
  border-top: 3px solid var(--lime);
}

.page-about .ab-metrics__item {
  background: var(--navy-2);
  padding: clamp(18px, 3vw, 26px) clamp(14px, 2vw, 20px);
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "num unit"
    "cap cap";
  align-items: baseline;
  gap: 8px 8px;
}

.page-about .ab-metrics__num {
  grid-area: num;
  font-size: clamp(46px, 9vw, 92px);
  line-height: 0.9;
  font-weight: 700;
  color: var(--lime);
  letter-spacing: -0.02em;
}

.page-about .ab-metrics__small {
  font-size: 0.42em;
  margin-left: 2px;
}

.page-about .ab-metrics__unit {
  grid-area: unit;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--orange);
  align-self: end;
  padding-bottom: 6px;
}

.page-about .ab-metrics__cap {
  grid-area: cap;
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(231, 233, 226, 0.74);
  max-width: 34ch;
}

/* ---------- 下一步 ---------- */
.page-about .ab-next {
  background: var(--concrete);
}

.page-about .ab-next__grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .ab-next__intro .title-md {
  margin: 12px 0 0;
  line-height: 1.2;
}

.page-about .ab-next__text {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ab-soft);
  max-width: 40ch;
}

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

.page-about .ab-next__link {
  display: grid;
  gap: 4px;
  text-decoration: none;
  background: var(--bone);
  border: 3px solid var(--ink);
  padding: 14px 16px;
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}

.page-about .ab-next__link:hover,
.page-about .ab-next__link:focus-visible {
  transform: translateY(-4px);
  border-color: var(--lime-2);
  background: var(--navy);
  box-shadow: 6px 8px 0 rgba(34, 50, 43, 0.24);
  outline: none;
}

.page-about .ab-next__link:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 3px;
}

.page-about .ab-next__link-title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--navy);
}

.page-about .ab-next__link-desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--ab-soft);
}

.page-about .ab-next__link:hover .ab-next__link-title,
.page-about .ab-next__link:focus-visible .ab-next__link-title {
  color: var(--lime);
}

.page-about .ab-next__link:hover .ab-next__link-desc,
.page-about .ab-next__link:focus-visible .ab-next__link-desc {
  color: rgba(231, 233, 226, 0.76);
}

.page-about .ab-next__back {
  margin: clamp(22px, 4vw, 32px) 0 0;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .ab-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 780px) {
  .page-about .ab-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
    align-items: end;
    gap: 24px;
  }

  .page-about .ab-head__note {
    text-align: right;
    justify-self: end;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
    gap: clamp(28px, 4vw, 52px);
  }

  .page-about .ab-hero__media {
    clip-path: polygon(0 8%, 100% 0, 100% 92%, 0 100%);
  }

  .page-about .ab-track__item:nth-child(1) .ab-track__box {
    margin-left: 0;
    margin-right: 18%;
  }

  .page-about .ab-track__item:nth-child(2) .ab-track__box {
    margin-left: 6%;
    margin-right: 12%;
  }

  .page-about .ab-track__item:nth-child(3) .ab-track__box {
    margin-left: 12%;
    margin-right: 6%;
  }

  .page-about .ab-track__item:nth-child(4) .ab-track__box {
    margin-left: 18%;
    margin-right: 0;
  }

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

  .page-about .ab-team__foot {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: start;
  }

  .page-about .ab-map__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
    align-items: start;
  }

  .page-about .ab-slots__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-about .ab-next__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: clamp(28px, 5vw, 56px);
    align-items: start;
  }

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

@media (min-width: 1120px) {
  .page-about .ab-hero__crumbs {
    margin-bottom: clamp(28px, 4vw, 48px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-track__box,
  .page-about .ab-track__dot,
  .page-about .ab-map__city,
  .page-about .ab-next__link {
    transition: none;
  }

  .page-about .ab-track__item:hover .ab-track__box,
  .page-about .ab-track__item:focus-within .ab-track__box,
  .page-about .ab-map__city:hover,
  .page-about .ab-map__city:focus-visible,
  .page-about .ab-next__link:hover,
  .page-about .ab-next__link:focus-visible {
    transform: none;
  }
}
<<<END>>>