.page-about {
  --ab-rule: 1px solid var(--grid);
  --ab-dash: 1px dashed rgba(42, 74, 63, 0.7);
  display: block;
  color: var(--white);
  background-color: var(--pitch);
  background-image:
    radial-gradient(120% 70% at 90% 0%, rgba(47, 128, 237, 0.10), transparent 58%),
    radial-gradient(90% 60% at 0% 100%, rgba(217, 164, 65, 0.09), transparent 62%);
}

.page-about .ab-wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(1rem, 2.4vw, 1.75rem) var(--gut) clamp(2.5rem, 7vw, 5rem);
}

.page-about .ab-crumbs {
  margin-bottom: clamp(0.75rem, 2vw, 1.25rem);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 2.75rem);
  padding-block: clamp(0.5rem, 2vw, 1.25rem) clamp(2rem, 5vw, 3.25rem);
  overflow: hidden;
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  z-index: 0;
  top: 4%;
  right: -14%;
  width: min(560px, 68%);
  height: 230px;
  background: linear-gradient(112deg, rgba(217, 164, 65, 0.24), rgba(47, 128, 237, 0.14) 62%, transparent);
  clip-path: polygon(20% 0, 100% 0, 80% 100%, 0 100%);
  pointer-events: none;
}

.page-about .ab-hero__copy,
.page-about .ab-hero__fig {
  position: relative;
  z-index: 1;
}

.page-about .ab-hero h1 {
  margin: 0.5rem 0 1rem;
  font-size: clamp(2.1rem, 5.2vw, 4rem);
  line-height: 1.04;
  font-weight: 800;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.page-about .ab-hero__lead {
  max-width: 62ch;
  margin: 0 0 1.5rem;
  font-size: clamp(1rem, 1.15vw, 1.125rem);
  line-height: 1.78;
  color: var(--crowd);
}

.page-about .ab-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
}

.page-about .ab-hero__fig {
  margin: 0;
  border: var(--ab-rule);
  background: var(--ink);
}

.page-about .ab-hero__fig::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 46px;
  height: 46px;
  border-top: 2px solid var(--gold);
  border-left: 2px solid var(--gold);
  pointer-events: none;
  z-index: 2;
}

.page-about .ab-hero__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.88) contrast(1.06);
}

.page-about .ab-hero__fig figcaption {
  padding: 0.7rem 0.9rem 0.85rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--crowd);
  border-top: var(--ab-rule);
}

/* ---------- 章节导航条 ---------- */
.page-about .ab-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.9rem;
  padding-top: 1rem;
  border-top: var(--ab-rule);
}

.page-about .ab-toc a {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  padding: 0.3rem 0;
  font-size: 0.875rem;
  color: var(--crowd);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .ab-toc a:hover,
.page-about .ab-toc a:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.page-about .ab-toc__num {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--gold);
  letter-spacing: 0.08em;
}

/* ---------- 通用章节骨架 ---------- */
.page-about .ab-section {
  position: relative;
  padding-block: clamp(2rem, 4.6vw, 3.5rem);
  border-top: var(--ab-rule);
}

.page-about .ab-section::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: clamp(52px, 11vw, 132px);
  height: 2px;
  background: var(--gold);
}

.page-about .ab-section--band {
  background: linear-gradient(180deg, rgba(232, 220, 192, 0.07), rgba(232, 220, 192, 0.015));
  border-block: var(--ab-rule);
  padding-inline: clamp(0.9rem, 2.4vw, 1.75rem);
  margin-inline: calc(clamp(0.9rem, 2.4vw, 1.75rem) * -1);
}

.page-about .ab-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.5rem;
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.page-about .ab-head__idx {
  font-family: var(--mono);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .ab-head h2 {
  margin: 0;
  font-size: clamp(1.5rem, 3.1vw, 2.35rem);
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.page-about .ab-head__sub {
  max-width: 58ch;
  margin: 0.55rem 0 0;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--crowd);
}

/* ---------- 01 服务人群 ---------- */
.page-about .ab-who {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 3.5vw, 2.5rem);
}

.page-about .ab-who__text p {
  margin: 0 0 1rem;
  line-height: 1.8;
}

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

.page-about .ab-side {
  align-self: start;
  padding: 1.1rem 1.15rem 1.25rem;
  background: var(--ink-2);
  border: var(--ab-rule);
  border-left: 3px solid var(--gold);
}

.page-about .ab-side__title {
  margin: 0 0 0.85rem;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--gold);
}

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

.page-about .ab-side__list li {
  display: grid;
  gap: 0.15rem;
  padding: 0.7rem 0;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--white);
  border-top: var(--ab-dash);
}

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

.page-about .ab-side__k {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--blue);
}

/* ---------- 02 赛后接力时间线 ---------- */
.page-about .ab-flow {
  margin: 0;
  padding: 0 0 0 1.15rem;
  list-style: none;
  border-left: 2px solid var(--grid);
}

.page-about .ab-flow__step {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.4rem;
  padding: 1.15rem 0 1.4rem 0;
}

.page-about .ab-flow__step + .ab-flow__step {
  border-top: var(--ab-dash);
}

.page-about .ab-flow__step::before {
  content: "";
  position: absolute;
  top: 1.5rem;
  left: -1.6rem;
  width: 10px;
  height: 10px;
  background: var(--gold);
  transform: rotate(45deg);
}

.page-about .ab-flow__no {
  font-family: var(--mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .ab-flow__title {
  margin: 0 0 0.4rem;
  font-size: clamp(1.0625rem, 1.8vw, 1.3rem);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.page-about .ab-flow__text {
  margin: 0 0 0.7rem;
  font-size: 0.9688rem;
  line-height: 1.78;
  color: var(--crowd);
}

/* ---------- 03 栏目更新 ---------- */
.page-about .ab-notes {
  margin-top: 1.25rem;
}

.page-about .ab-note {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.1rem 1.15rem 1.25rem;
  border-left: 2px solid var(--grid);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .ab-note:hover,
.page-about .ab-note:focus-within {
  border-left-color: var(--gold);
}

.page-about .ab-note .slab__index {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--blue);
}

.page-about .ab-note .slab__title {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .ab-note .slab__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--crowd);
}

.page-about .ab-note .slab__meta {
  margin: auto 0 0;
  padding-top: 0.6rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--crowd);
  border-top: var(--ab-dash);
}

/* ---------- 04 团队与日常 ---------- */
.page-about .ab-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.35rem, 3.2vw, 2.25rem);
  margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
}

.page-about .ab-team__fig {
  margin: 0;
  background: var(--ink);
  border: var(--ab-rule);
}

.page-about .ab-team__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.86) contrast(1.05);
}

.page-about .ab-team__fig figcaption {
  padding: 0.65rem 0.85rem 0.8rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--crowd);
  border-top: var(--ab-rule);
}

.page-about .ab-team__body p {
  margin: 0 0 1rem;
  line-height: 1.8;
}

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

.page-about .ab-stats {
  padding-block: clamp(1.1rem, 2.5vw, 1.6rem);
  border-top: var(--ab-rule);
  border-bottom: var(--ab-rule);
}

.page-about .ab-stats .stat {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding-left: 0.85rem;
  border-left: 2px solid var(--grid);
}

.page-about .ab-stats .stat__num {
  font-family: var(--mono);
  font-size: clamp(1.5rem, 3vw, 2.05rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.page-about .ab-stats .stat__label {
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--crowd);
}

/* ---------- 05 服务地区 ---------- */
.page-about .ab-region {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
  padding: clamp(1.15rem, 2.8vw, 1.85rem);
  background: var(--ink-2);
  border: var(--ab-rule);
  border-top: 3px solid var(--gold);
}

.page-about .ab-region__place {
  margin: 0.7rem 0 0.55rem;
  font-family: var(--mono);
  font-size: clamp(1.75rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-about .ab-region__text {
  margin: 0;
  max-width: 52ch;
  line-height: 1.78;
  color: var(--crowd);
}

.page-about .ab-region__act {
  padding-top: 1.15rem;
  border-top: var(--ab-dash);
}

.page-about .ab-region__acttitle {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .ab-region__acttext {
  margin: 0 0 1rem;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--crowd);
}

.page-about .ab-region__act .btn {
  margin: 0 0.5rem 0.5rem 0;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .ab-head {
    grid-template-columns: 3.5rem minmax(0, 1fr);
    gap: 0 1.35rem;
    align-items: start;
  }

  .page-about .ab-head__idx {
    padding-top: 0.5rem;
  }

  .page-about .ab-flow__step {
    grid-template-columns: 3.25rem minmax(0, 1fr);
    column-gap: 1.25rem;
    align-items: start;
  }

  .page-about .ab-flow__no {
    padding-top: 0.3rem;
  }

  .page-about .ab-region {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 1.75rem;
  }

  .page-about .ab-region__act {
    padding-top: 0;
    padding-left: 1.75rem;
    border-top: 0;
    border-left: var(--ab-dash);
  }
}

@media (min-width: 960px) {
  .page-about .ab-hero {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: end;
  }

  .page-about .ab-who {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: clamp(1.75rem, 3.5vw, 3rem);
  }

  .page-about .ab-team {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    align-items: start;
  }
}

@media (min-width: 1180px) {
  .page-about .ab-hero {
    padding-block: clamp(1rem, 2.5vw, 2rem) clamp(2.5rem, 5vw, 3.75rem);
  }

  .page-about .ab-hero__fig {
    margin-top: 1.5rem;
  }
}

@media (max-width: 520px) {
  .page-about .ab-toc {
    gap: 0.35rem 0.75rem;
  }

  .page-about .ab-toc a {
    font-size: 0.8125rem;
  }

  .page-about .ab-region {
    padding: 1rem 0.95rem 1.15rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-toc a,
  .page-about .ab-note {
    transition: none;
  }
}
<<<END>>>