.page-about {
  --ab-inline: clamp(1.25rem, 5vw, 5rem);
  --ab-block: clamp(3rem, 6vw, 6rem);
  color: var(--color-moon);
  background: var(--color-ink);
  overflow-x: hidden;
}

.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-about .breadcrumbs {
  max-width: var(--shell);
  margin-inline: auto;
  padding: 1.1rem var(--ab-inline) 0;
}

/* ---------- 首屏跨页 ---------- */
.page-about .ab-hero {
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(1.5rem, 4vw, 3rem) var(--ab-inline) var(--ab-block);
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  grid-template-columns: 1fr;
  border-bottom: 1px solid var(--color-line);
}

.page-about .ab-hero__index {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.page-about .ab-year {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(4rem, 15vw, 9rem);
  line-height: 0.82;
  letter-spacing: -0.06em;
  color: var(--color-moon);
  opacity: 0.18;
}

.page-about .ab-hero__note {
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-mist);
  margin: 0;
}

.page-about .ab-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  margin-top: 0.75rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--color-line);
}

.page-about .ab-jump a {
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--color-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .ab-jump a:hover,
.page-about .ab-jump a:focus-visible {
  color: var(--color-cyan);
  border-color: var(--color-cyan);
}

.page-about .ab-hero__body h1 {
  margin: 0 0 1.25rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 5.4vw, 3.9rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
  color: var(--color-moon);
}

.page-about .ab-lede {
  margin: 0 0 1rem;
  font-size: clamp(1rem, 1.5vw, 1.14rem);
  line-height: 1.78;
  color: var(--color-moon-soft);
  max-width: 44ch;
}

.page-about .ab-lede--sub {
  color: var(--color-mist);
  font-size: clamp(0.94rem, 1.3vw, 1rem);
  max-width: 40ch;
}

.page-about .ab-hero__facts {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 1.25rem 0 0;
  border-top: 1px solid var(--color-line);
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 2.5rem;
}

.page-about .ab-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.page-about .ab-hero__num {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 500;
  color: var(--color-cyan);
  line-height: 1;
}

.page-about .ab-hero__label {
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--color-mist);
}

.page-about .ab-hero__figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--color-line);
}

.page-about .ab-hero__img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
}

/* ---------- 通用标题组 ---------- */
.page-about .ab-head {
  display: grid;
  gap: 0.7rem;
  margin-bottom: clamp(1.75rem, 4vw, 3rem);
  max-width: 62ch;
}

.page-about .ab-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 3.8vw, 2.75rem);
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--color-moon);
}

.page-about .ab-head__intro {
  margin: 0;
  font-size: clamp(0.95rem, 1.35vw, 1.05rem);
  line-height: 1.78;
  color: var(--color-mist);
}

/* ---------- 内容方法 ---------- */
.page-about .ab-method {
  max-width: var(--shell);
  margin-inline: auto;
  padding: var(--ab-block) var(--ab-inline);
}

.page-about .ab-method__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  grid-template-columns: 1fr;
}

.page-about .ab-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--color-line-strong);
}

.page-about .ab-flow__step {
  display: grid;
  grid-template-columns: 2.6rem 1fr;
  gap: 0.35rem 0.9rem;
  align-items: baseline;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--color-line);
}

.page-about .ab-flow__no {
  font-size: 0.8rem;
  color: var(--color-cyan);
  letter-spacing: 0.08em;
}

.page-about .ab-flow__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-moon);
  letter-spacing: 0.01em;
}

.page-about .ab-flow__desc {
  grid-column: 2;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--color-mist);
}

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

.page-about .ab-method__figure .media-frame__media {
  width: 100%;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.08);
}

/* ---------- 月白插页：栏目结构 ---------- */
.page-about .ab-band {
  background: var(--color-moon);
  color: var(--color-ink);
  padding-block: var(--ab-block);
  border-block: 1px solid var(--color-line);
}

.page-about .ab-band__inner {
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--ab-inline);
}

.page-about .ab-head--dark h2 {
  color: var(--color-ink);
}

.page-about .ab-head--dark .ab-head__intro {
  color: var(--color-ink-soft);
}

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

.page-about .ab-catalog-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(1.25rem, 2.6vw, 2rem);
  grid-template-columns: 1fr;
}

.page-about .ab-catalog-list__item {
  border-top: 1px solid rgba(6, 9, 20, 0.18);
  padding-top: 0.9rem;
  display: grid;
  gap: 0.4rem;
}

.page-about .ab-catalog-list__no {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--color-teal);
}

.page-about .ab-catalog-list__item h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  letter-spacing: -0.01em;
  color: var(--color-ink);
}

.page-about .ab-catalog-list__item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: rgba(6, 9, 20, 0.72);
}

.page-about .ab-band__foot {
  margin: clamp(2rem, 4vw, 3rem) 0 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--color-ink-soft);
  max-width: 58ch;
}

/* ---------- 团队与角色 ---------- */
.page-about .ab-team {
  max-width: var(--shell);
  margin-inline: auto;
  padding: var(--ab-block) var(--ab-inline);
}

.page-about .ab-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

.page-about .ab-role {
  background: var(--color-glass);
  border: 1px solid var(--color-line);
  padding: clamp(1.1rem, 2.2vw, 1.6rem);
  display: grid;
  gap: 0.45rem;
  align-content: start;
  transition: border-color 0.28s var(--ease), background-color 0.28s var(--ease);
}

.page-about .ab-role:hover,
.page-about .ab-role:focus-within {
  border-color: var(--color-cyan);
  background: rgba(55, 240, 192, 0.07);
}

.page-about .ab-role__tag {
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--color-violet);
}

.page-about .ab-role:hover .ab-role__tag {
  color: var(--color-cyan);
}

.page-about .ab-role__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--color-moon);
}

.page-about .ab-role__duty {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--color-mist);
  opacity: 0.78;
  transition: opacity 0.28s var(--ease), transform 0.28s var(--ease);
}

.page-about .ab-role:hover .ab-role__duty,
.page-about .ab-role:focus-within .ab-role__duty {
  opacity: 1;
  transform: translateY(-2px);
}

.page-about .ab-team__note {
  margin: clamp(1.5rem, 3vw, 2.25rem) 0 0;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--color-mist);
  max-width: 56ch;
  padding-left: 1rem;
  border-left: 2px solid var(--color-cyan);
}

/* ---------- 本地服务 ---------- */
.page-about .ab-local {
  position: relative;
  overflow: hidden;
  background: var(--color-navy);
  padding-block: var(--ab-block);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.page-about .ab-local__media {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.28;
  filter: saturate(0.7) contrast(1.1);
}

.page-about .ab-local::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 9, 20, 0.82) 0%, rgba(6, 9, 20, 0.92) 100%);
  pointer-events: none;
}

.page-about .ab-local__inner {
  position: relative;
  z-index: 1;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--ab-inline);
}

.page-about .ab-local__cols {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
  grid-template-columns: 1fr;
  border-top: 1px solid var(--color-line-strong);
  padding-top: clamp(1.25rem, 3vw, 2rem);
}

.page-about .ab-local__col h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.08rem;
  color: var(--color-cyan);
  letter-spacing: 0.01em;
}

.page-about .ab-local__col p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--color-moon-soft);
}

.page-about .ab-local__foot {
  margin: clamp(1.5rem, 3vw, 2rem) 0 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--color-mist);
}

/* ---------- 里程碑 ---------- */
.page-about .ab-milestones {
  max-width: var(--shell);
  margin-inline: auto;
  padding: var(--ab-block) var(--ab-inline) calc(var(--ab-block) * 1.1);
}

.page-about .ab-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.75rem;
  position: relative;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 0.5rem;
  top: 0.7rem;
  bottom: 0.7rem;
  width: 1px;
  background: linear-gradient(180deg, var(--color-cyan) 0%, var(--color-violet) 55%, rgba(108, 90, 168, 0) 100%);
}

.page-about .ab-timeline__item {
  position: relative;
  padding: 0 0 clamp(1.5rem, 3.2vw, 2.25rem);
}

.page-about .ab-timeline__item::before {
  content: "";
  position: absolute;
  left: -1.25rem;
  top: 0.5rem;
  width: 9px;
  height: 9px;
  transform: translateX(-50%);
  border-radius: 50%;
  background: var(--color-ink);
  border: 1px solid var(--color-cyan);
  box-shadow: 0 0 0 3px rgba(55, 240, 192, 0.12);
}

.page-about .ab-timeline__year {
  margin: 0 0 0.35rem;
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  color: var(--color-orange);
}

.page-about .ab-timeline__title {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.15rem, 2.2vw, 1.4rem);
  color: var(--color-moon);
  letter-spacing: -0.01em;
}

.page-about .ab-timeline__desc {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--color-mist);
  max-width: 54ch;
}

/* ---------- 收束 ---------- */
.page-about .ab-close {
  margin-top: clamp(1rem, 2.5vw, 1.75rem);
  padding-top: clamp(1.25rem, 3vw, 2rem);
  border-top: 1px solid var(--color-line-strong);
  display: grid;
  gap: 0.9rem;
}

.page-about .ab-close__text {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.4vw, 1.55rem);
  font-weight: 700;
  line-height: 1.42;
  letter-spacing: -0.015em;
  color: var(--color-moon);
  max-width: 34ch;
}

.page-about .ab-close__links {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.75rem;
}

/* ---------- 行内链接 ---------- */
.page-about .ab-inline-link {
  color: var(--color-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(55, 240, 192, 0.42);
  padding-bottom: 1px;
  transition: border-color 0.24s var(--ease), color 0.24s var(--ease);
}

.page-about .ab-inline-link:hover,
.page-about .ab-inline-link:focus-visible {
  color: var(--color-moon);
  border-color: var(--color-moon);
}

.page-about .ab-band .ab-inline-link {
  color: var(--color-teal);
  border-bottom-color: rgba(26, 141, 122, 0.5);
}

.page-about .ab-band .ab-inline-link:hover,
.page-about .ab-band .ab-inline-link:focus-visible {
  color: var(--color-ink);
  border-color: var(--color-ink);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .ab-catalog-list {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

@media (min-width: 900px) {
  .page-about .ab-hero {
    grid-template-columns: repeat(12, 1fr);
    column-gap: clamp(1rem, 2vw, 2rem);
    align-items: start;
  }

  .page-about .ab-hero__index {
    grid-column: 1 / 6;
  }

  .page-about .ab-hero__body {
    grid-column: 6 / 13;
  }

  .page-about .ab-hero__figure {
    grid-column: 1 / 13;
    margin-top: clamp(1rem, 2.5vw, 2rem);
  }

  .page-about .ab-flow__step {
    grid-template-columns: 3.4rem minmax(8rem, 11rem) 1fr;
  }

  .page-about .ab-flow__desc {
    grid-column: 3;
  }
}

@media (min-width: 960px) {
  .page-about .ab-method__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-about .ab-method__figure {
    position: sticky;
    top: 2rem;
  }

  .page-about .ab-catalog-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .ab-close {
    grid-template-columns: 1fr auto;
    align-items: end;
    column-gap: 2rem;
  }
}

@media (min-width: 1100px) {
  .page-about .ab-roles {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-jump a,
  .page-about .ab-role,
  .page-about .ab-role__duty,
  .page-about .ab-role__tag,
  .page-about .ab-inline-link {
    transition: none;
  }

  .page-about .ab-role:hover .ab-role__duty,
  .page-about .ab-role:focus-within .ab-role__duty {
    transform: none;
  }
}
<<<END>>>