.page-about {
  background: var(--ink-night);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about .ab-crumbbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap-s);
  padding: 1rem 0 .4rem;
}

.page-about .ab-crumb-sep {
  color: var(--muted);
  margin: 0 .35rem;
  font-family: var(--font-mono);
}

.page-about .ab-jump {
  font-size: .82rem;
  padding: .42rem .95rem;
  white-space: nowrap;
}

/* ---------- 首屏 ---------- */

.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(2.2rem, 6vw, 4.4rem) 0 clamp(1.8rem, 4.5vw, 3rem);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line-08) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-08) 1px, transparent 1px);
  background-size: 96px 96px;
  -webkit-mask-image: radial-gradient(120% 82% at 18% 0%, #000 0%, transparent 74%);
  mask-image: radial-gradient(120% 82% at 18% 0%, #000 0%, transparent 74%);
  opacity: .75;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  top: -30%;
  width: 46vw;
  height: 46vw;
  max-width: 520px;
  max-height: 520px;
  border-radius: 42% 58% 55% 45%;
  background: radial-gradient(circle at 35% 35%, rgba(31, 91, 74, .55), transparent 68%);
  pointer-events: none;
}

.page-about .ab-hero .wrap {
  position: relative;
  z-index: 1;
}

.page-about .ab-hero-title {
  margin: .55rem 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -.02em;
  font-size: clamp(1.7rem, 5.4vw, 3.05rem);
  line-height: 1.2;
  color: var(--paper);
  max-width: 24ch;
}

.page-about .ab-hero-lede {
  margin: 1rem 0 0;
  max-width: 56ch;
  color: var(--paper-72);
  font-size: clamp(.95rem, 2vw, 1.05rem);
  line-height: 1.85;
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-m);
  margin-top: clamp(1.8rem, 4vw, 2.6rem);
  padding-top: var(--gap-l);
  border-top: 1px solid var(--line-08);
}

@media (min-width: 640px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .ab-stat {
  display: grid;
  gap: .3rem;
  padding-left: .9rem;
  border-left: 2px solid var(--line-14);
}

.page-about .ab-stat-num {
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 5vw, 2.7rem);
  line-height: 1;
  color: var(--chip-gold);
  letter-spacing: -.02em;
}

.page-about .ab-stat-label {
  font-size: .84rem;
  color: var(--muted);
  line-height: 1.6;
}

/* ---------- 布局 ---------- */

.page-about .ab-layout {
  display: grid;
  gap: var(--gap-l);
  padding-bottom: clamp(2.6rem, 7vw, 5rem);
}

.page-about .ab-rail {
  display: flex;
  gap: .45rem;
  overflow-x: auto;
  padding: 0 0 .7rem;
  border-bottom: 1px solid var(--line-08);
  scrollbar-width: none;
}

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

.page-about .ab-rail .rail-title {
  display: none;
}

.page-about .ab-rail .rail-link {
  flex: 0 0 auto;
  white-space: nowrap;
  font-size: .82rem;
  color: var(--paper-72);
  text-decoration: none;
  padding: .3rem .72rem;
  border: 1px solid var(--line-08);
  border-radius: var(--r-capsule);
  transition: color var(--t-fast), border-color var(--t-fast), background var(--t-fast);
}

.page-about .ab-rail .rail-link:hover,
.page-about .ab-rail .rail-link:focus-visible {
  color: var(--ink-night);
  background: var(--chip-gold);
  border-color: var(--chip-gold);
}

.page-about .ab-flow {
  display: grid;
  gap: clamp(2.4rem, 6vw, 4.2rem);
  min-width: 0;
}

@media (min-width: 1024px) {
  .page-about .ab-layout {
    grid-template-columns: minmax(0, 1fr) 200px;
    gap: clamp(2rem, 4vw, 3.4rem);
    align-items: start;
  }

  .page-about .ab-rail {
    grid-column: 2;
    grid-row: 1;
    display: block;
    position: sticky;
    top: 6.5rem;
    border-bottom: 0;
    padding: 0;
    overflow: visible;
  }

  .page-about .ab-rail .rail-title {
    display: block;
    margin: 0 0 .7rem;
  }

  .page-about .ab-rail .rail-link {
    display: block;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    padding: .34rem 0 .34rem .7rem;
    font-size: .86rem;
    color: var(--muted);
    background: transparent;
    transition: color var(--t-fast), border-color var(--t-fast);
  }

  .page-about .ab-rail .rail-link:hover,
  .page-about .ab-rail .rail-link:focus-visible {
    color: var(--paper);
    background: transparent;
    border-left-color: var(--chip-gold);
  }

  .page-about .ab-flow {
    grid-column: 1;
    grid-row: 1;
  }
}

/* ---------- 章节通用 ---------- */

.page-about .ab-ch {
  display: grid;
  gap: 1.1rem;
}

.page-about .ab-ch-head {
  display: grid;
  gap: .5rem;
}

.page-about .ab-ch-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .18em;
  color: var(--chip-gold);
}

.page-about .ab-ch-title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -.02em;
  font-size: clamp(1.28rem, 3.6vw, 1.85rem);
  line-height: 1.3;
  color: var(--paper);
}

.page-about .ab-ch-lede {
  margin: 0;
  max-width: 54ch;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--paper-72);
}

.page-about .ab-ch-body {
  display: grid;
  gap: .9rem;
  max-width: 62ch;
}

.page-about .ab-ch-body p {
  margin: 0;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--paper-72);
}

.page-about .ab-inline-link {
  justify-self: start;
  font-size: .88rem;
  color: var(--chip-gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(227, 168, 87, .45);
  padding-bottom: 2px;
  transition: color var(--t-fast), border-color var(--t-fast);
}

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

/* ---------- 图片容器 ---------- */

.page-about .ab-fig {
  margin: .3rem 0 0;
  border-radius: var(--r-card);
  overflow: hidden;
  border: 1px solid var(--line-08);
  background: linear-gradient(135deg, var(--lake-deep), var(--ink-night));
  box-shadow: var(--shadow-card);
}

.page-about .ab-fig--wide {
  border-radius: var(--r-card-alt);
}

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

.page-about .ab-fig figcaption {
  padding: .6rem .9rem;
  font-size: .78rem;
  line-height: 1.7;
  color: var(--muted);
  border-top: 1px solid var(--line-08);
}

/* ---------- 年份轴 ---------- */

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

.page-about .ab-axis-item {
  display: grid;
  gap: .3rem;
  padding: 1rem 0 1.15rem;
  border-top: 1px solid var(--line-08);
}

.page-about .ab-axis-item:last-child {
  border-bottom: 1px solid var(--line-08);
}

@media (min-width: 760px) {
  .page-about .ab-axis-item {
    grid-template-columns: 116px minmax(0, 1fr);
    gap: 1.5rem;
    padding: 1.15rem 0 1.35rem;
  }
}

.page-about .ab-axis-year {
  font-family: var(--font-mono);
  font-size: .95rem;
  letter-spacing: .04em;
  color: var(--chip-gold);
}

.page-about .ab-axis-title {
  margin: 0 0 .25rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--paper);
  line-height: 1.5;
}

.page-about .ab-axis-text {
  margin: 0;
  max-width: 58ch;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--paper-72);
}

.page-about .ab-axis-more {
  margin: .4rem 0 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: .82rem;
  line-height: 1.7;
  color: var(--muted);
  transition: max-height var(--t-mid), opacity var(--t-mid), margin var(--t-mid);
}

.page-about .ab-axis-item:hover .ab-axis-more,
.page-about .ab-axis-item:focus-within .ab-axis-more {
  max-height: 6rem;
  opacity: 1;
}

@media (hover: none) {
  .page-about .ab-axis-more {
    max-height: none;
    opacity: 1;
  }
}

/* ---------- 横向图片带 ---------- */

.page-about .ab-strip {
  margin: 0;
  position: relative;
  border-radius: 22px 8px 24px 10px;
  overflow: hidden;
  border: 1px solid var(--line-08);
  background: var(--lake-deep);
}

.page-about .ab-strip img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  max-height: 380px;
  object-fit: cover;
}

.page-about .ab-strip figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 2.4rem 1.1rem .9rem;
  font-size: .82rem;
  line-height: 1.7;
  color: var(--paper-72);
  background: linear-gradient(180deg, rgba(12, 22, 38, 0), rgba(12, 22, 38, .88));
}

/* ---------- 适合谁 ---------- */

.page-about .ab-who {
  display: grid;
  gap: var(--gap-m);
}

@media (min-width: 900px) {
  .page-about .ab-who {
    grid-template-columns: 1.3fr 1fr;
    align-items: start;
  }

  .page-about .ab-who-card--a {
    grid-row: 1 / span 2;
  }
}

.page-about .ab-who-card {
  padding: 1.15rem 1.25rem 1.3rem;
  border: 1px solid var(--line-08);
  background: var(--paper-06);
  transition: transform var(--t-fast), border-color var(--t-fast);
}

.page-about .ab-who-card:hover {
  transform: translateY(-2px);
  border-color: var(--chip-glow);
}

.page-about .ab-who-card--a {
  border-radius: var(--r-card);
  background: linear-gradient(158deg, rgba(31, 91, 74, .6), rgba(12, 22, 38, .25));
}

.page-about .ab-who-card--b {
  border-radius: var(--r-card-alt);
  background: linear-gradient(158deg, rgba(53, 44, 99, .55), rgba(12, 22, 38, .25));
}

.page-about .ab-who-card--c {
  border-radius: var(--r-soft);
  background: linear-gradient(158deg, rgba(110, 42, 56, .55), rgba(12, 22, 38, .25));
}

.page-about .ab-who-tag {
  margin: 0 0 .5rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .16em;
  color: var(--chip-gold);
}

.page-about .ab-who-name {
  margin: 0 0 .5rem;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -.01em;
  font-size: 1.05rem;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .ab-who-text {
  margin: 0;
  font-size: .9rem;
  line-height: 1.85;
  color: var(--paper-72);
}

/* ---------- 六类房间 ---------- */

.page-about .ab-cats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .6rem;
}

@media (min-width: 620px) {
  .page-about .ab-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .page-about .ab-cats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .ab-cat {
  padding: .85rem 1rem .95rem;
  border: 1px solid var(--line-08);
  border-radius: var(--r-soft);
  background: linear-gradient(180deg, rgba(31, 91, 74, .42), rgba(14, 58, 68, .3));
  transition: transform var(--t-fast), border-color var(--t-fast);
}

.page-about .ab-cat:hover {
  transform: translateY(-2px);
  border-color: var(--chip-glow);
}

.page-about .ab-cat-name {
  display: block;
  font-size: .98rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .ab-cat-desc {
  display: block;
  margin-top: .25rem;
  font-size: .82rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 字段与时长 ---------- */

.page-about .ab-fields {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .5rem;
}

@media (min-width: 700px) {
  .page-about .ab-fields {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .ab-field {
  display: grid;
  gap: .2rem;
  padding: .7rem .85rem .8rem;
  border: 1px solid var(--line-08);
  border-radius: var(--r-soft);
  background: rgba(20, 85, 95, .22);
}

.page-about .ab-field-key {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--chip-gold);
}

.page-about .ab-field-val {
  font-size: .86rem;
  color: var(--paper-72);
}

.page-about .ab-dur {
  display: grid;
  gap: .6rem;
}

@media (min-width: 700px) {
  .page-about .ab-dur {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .ab-dur-item {
  display: grid;
  gap: .3rem;
  padding: 1rem 1.05rem 1.1rem;
  border-radius: var(--r-soft);
  border: 1px solid var(--line-08);
}

.page-about .ab-dur-item--a {
  background: linear-gradient(150deg, rgba(46, 125, 99, .4), rgba(12, 22, 38, .3));
}

.page-about .ab-dur-item--b {
  background: linear-gradient(150deg, rgba(20, 85, 95, .45), rgba(12, 22, 38, .3));
}

.page-about .ab-dur-item--c {
  background: linear-gradient(150deg, rgba(110, 42, 56, .45), rgba(12, 22, 38, .3));
}

.page-about .ab-dur-num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4.2vw, 2.1rem);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--chip-gold);
}

.page-about .ab-dur-label {
  font-size: .82rem;
  color: var(--muted);
}

/* ---------- 团队 ---------- */

.page-about .ab-crew {
  display: grid;
  gap: var(--gap-m);
}

@media (min-width: 880px) {
  .page-about .ab-crew {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .ab-crew-card--b {
    margin-top: 1.4rem;
  }

  .page-about .ab-crew-card--c {
    margin-top: .6rem;
  }
}

.page-about .ab-crew-card {
  padding: 1.2rem 1.2rem 1.3rem;
  border: 1px solid var(--line-08);
  transition: transform var(--t-fast), border-color var(--t-fast);
}

.page-about .ab-crew-card:hover {
  transform: translateY(-2px);
  border-color: var(--chip-glow);
}

.page-about .ab-crew-card--a {
  border-radius: 22px 6px 24px 8px;
  background: linear-gradient(160deg, rgba(31, 91, 74, .6), rgba(12, 22, 38, .28));
}

.page-about .ab-crew-card--b {
  border-radius: 6px 24px 8px 20px;
  background: linear-gradient(160deg, rgba(20, 85, 95, .62), rgba(12, 22, 38, .28));
}

.page-about .ab-crew-card--c {
  border-radius: 24px 8px 6px 22px;
  background: linear-gradient(160deg, rgba(53, 44, 99, .6), rgba(12, 22, 38, .28));
}

.page-about .ab-crew-num {
  margin: 0 0 .4rem;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--chip-gold);
}

.page-about .ab-crew-name {
  margin: 0 0 .5rem;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -.01em;
  font-size: 1.08rem;
  color: var(--paper);
}

.page-about .ab-crew-text {
  margin: 0 0 .7rem;
  font-size: .88rem;
  line-height: 1.8;
  color: var(--paper-72);
}

.page-about .ab-crew-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .4rem;
}

.page-about .ab-crew-list li {
  position: relative;
  padding-left: .9rem;
  font-size: .82rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .ab-crew-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--felt-light);
}

/* ---------- 青海色卡 ---------- */

.page-about .ab-swatches {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .5rem;
  margin-top: .4rem;
}

.page-about .ab-swatch {
  display: block;
  height: 46px;
  border-radius: 10px 3px 12px 4px;
  border: 1px solid var(--line-08);
}

.page-about .ab-swatch--1 {
  background: var(--lake-deep);
}

.page-about .ab-swatch--2 {
  background: var(--ink-night);
}

.page-about .ab-swatch--3 {
  background: var(--indigo);
}

.page-about .ab-swatch--4 {
  background: var(--chip-gold);
}

/* ---------- 结尾独白 ---------- */

.page-about .ab-outro {
  position: relative;
  display: grid;
  gap: .5rem;
  padding: clamp(1.6rem, 4vw, 2.4rem) clamp(1.1rem, 3vw, 2rem);
  border-radius: 26px 8px 26px 10px;
  background: linear-gradient(150deg, rgba(110, 42, 56, .42), rgba(14, 58, 68, .4));
  border: 1px solid var(--line-08);
  overflow: hidden;
}

.page-about .ab-outro::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  background: linear-gradient(180deg, var(--chip-gold), var(--felt-light));
}

.page-about .ab-outro-text {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -.02em;
  font-size: clamp(1.2rem, 3.4vw, 1.7rem);
  line-height: 1.45;
  color: var(--paper);
}

.page-about .ab-outro-sub {
  margin: 0;
  max-width: 44ch;
  font-size: .92rem;
  line-height: 1.85;
  color: var(--paper-72);
}

.page-about .ab-outro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-s);
  margin-top: .7rem;
}
<<<END>>>