.page-about {
  --ab-line: rgba(16, 22, 20, .13);
  --ab-line-inv: rgba(243, 239, 228, .2);
  --ab-text-soft: rgba(16, 22, 20, .72);
  --ab-text-faint: rgba(16, 22, 20, .58);
  --ab-pad: 18px;
  background: var(--paper);
  color: var(--seed);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--line-body);
  overflow-x: clip;
}

.page-about .ab-main {
  min-width: 0;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 18px 0 10px;
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--ab-text-faint);
}
.page-about .crumb {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(18, 60, 64, .28);
  transition: border-color .2s ease, color .2s ease;
}
.page-about .crumb:hover {
  color: var(--kiwi);
  border-bottom-color: var(--kiwi);
}
.page-about .crumb--here {
  color: var(--ab-text-faint);
  border-bottom: 0;
}
.page-about .crumb-sep {
  color: rgba(16, 22, 20, .32);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: 44px 0 46px;
  color: var(--paper);
  background:
    radial-gradient(120% 120% at 86% -10%, rgba(227, 168, 60, .18), transparent 58%),
    var(--seed);
}
.page-about .ab-hero::before {
  content: "";
  position: absolute;
  top: -46%;
  right: -16%;
  width: 64%;
  height: 200%;
  background: linear-gradient(168deg, rgba(90, 31, 44, .95), rgba(90, 31, 44, 0) 74%);
  transform: skewX(-14deg);
  pointer-events: none;
}
.page-about .ab-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--kiwi), var(--gold) 58%, rgba(227, 168, 60, 0));
}
.page-about .ab-hero__inner {
  position: relative;
  z-index: 1;
}
.page-about .ab-hero__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--kiwi-light);
}
.page-about .ab-hero__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(30px, 7.4vw, 58px);
  line-height: 1.14;
  letter-spacing: -.01em;
  max-width: 16em;
}
.page-about .ab-hero__lede {
  margin: 20px 0 0;
  max-width: 42em;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(243, 239, 228, .85);
}
.page-about .ab-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--ab-line-inv);
  border-bottom: 1px solid var(--ab-line-inv);
}
.page-about .ab-hero__facts li {
  flex: 1 1 150px;
  min-width: 0;
  padding: 16px 20px;
  border-left: 1px solid var(--ab-line-inv);
}
.page-about .ab-hero__facts li:first-child {
  border-left: 0;
  padding-left: 0;
}
.page-about .ab-hero__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 8vw, 50px);
  line-height: 1;
  color: var(--gold-light);
  font-variant-numeric: tabular-nums;
}
.page-about .ab-hero__unit {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  letter-spacing: .04em;
  color: rgba(243, 239, 228, .7);
}

/* ---------- 主栅格 ---------- */
.page-about .ab-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  padding-top: 34px;
  padding-bottom: 56px;
}

/* ---------- 章节 ---------- */
.page-about .ab-section {
  padding: 36px 0;
  border-top: 1px solid var(--ab-line);
}
.page-about .ab-section--first {
  border-top: 0;
  padding-top: 6px;
}
.page-about .ab-section--join {
  padding-bottom: 8px;
}
.page-about .ab-h2 {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(24px, 4.6vw, 37px);
  line-height: 1.26;
  letter-spacing: -.01em;
  max-width: 22em;
}
.page-about .ab-lead {
  margin: 0 0 20px;
  max-width: 40em;
  color: var(--ab-text-soft);
}
.page-about .eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--kiwi);
}
.page-about .ab-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ab-text-faint);
}
.page-about .media img,
.page-about .media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 缘起：左文右图 ---------- */
.page-about .ab-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}
.page-about .ab-split__text p {
  margin: 0 0 16px;
}
.page-about .ab-split__text p:last-child {
  margin-bottom: 0;
}
.page-about .ab-split__media {
  margin: 0;
  border-left: 3px solid var(--wine);
  padding-left: 0;
}

/* ---------- 记录范围 ---------- */
.page-about .ab-duo {
  gap: 16px;
}
.page-about .ab-duo__card {
  position: relative;
  padding: 20px 18px 22px;
  background: rgba(255, 255, 255, .58);
  border: var(--edge);
  clip-path: polygon(6px 0, 100% 0, 100% 100%, 0 100%, 0 6px);
  transition: transform .25s ease, box-shadow .25s ease;
}
.page-about .ab-duo__card--card {
  border-left: 3px solid var(--card-yellow);
}
.page-about .ab-duo__card--gold {
  border-left: 3px solid var(--gold);
}
.page-about .ab-duo__card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 30px rgba(16, 22, 20, .12);
}
.page-about .ab-duo__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 12px;
}
.page-about .ab-duo__card .card__title {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.35;
}
.page-about .ab-duo__body {
  margin: 0 0 14px;
  color: var(--ab-text-soft);
}
.page-about .ab-list {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ab-text-faint);
}
.page-about .ab-list li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 5px;
}
.page-about .ab-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 7px;
  height: 7px;
  background: var(--kiwi);
  transform: rotate(45deg);
}

/* ---------- 面板 ---------- */
.page-about .ab-panel {
  margin-top: 22px;
  padding: 22px 18px 24px;
  clip-path: polygon(12px 0, 100% 0, 100% 100%, 0 100%, 0 12px);
}
.page-about .ab-panel--archive {
  background: linear-gradient(158deg, rgba(70, 155, 63, .16), rgba(127, 203, 106, .05));
  border-left: 3px solid var(--kiwi);
}
.page-about .ab-panel--teal {
  background: linear-gradient(155deg, var(--teal), var(--ink));
  border-left: 3px solid var(--kiwi-light);
  color: var(--paper);
}
.page-about .ab-panel--indigo {
  background: linear-gradient(155deg, var(--indigo), #1A1740);
  border-left: 3px solid var(--gold);
  color: var(--paper);
}

/* ---------- 档案数字 ---------- */
.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 18px 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .ab-stat {
  position: relative;
  padding-top: 12px;
  border-top: 1px solid rgba(70, 155, 63, .38);
}
.page-about .ab-stat__value {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 6.6vw, 44px);
  line-height: 1;
  color: var(--seed);
  font-variant-numeric: tabular-nums;
}
.page-about .ab-stat:nth-child(3) .ab-stat__value {
  background: linear-gradient(96deg, var(--gold), var(--gold-light));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.page-about .ab-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.6;
  letter-spacing: .02em;
  color: var(--ab-text-soft);
}

/* ---------- 团队 ---------- */
.page-about .ab-wide-media {
  margin: 0 0 4px;
  border-bottom: 3px solid var(--kiwi);
}
.page-about .ab-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .ab-team__card {
  padding: 18px 16px 20px;
  background: var(--glass);
  border: var(--edge);
  transition: background .25s ease, transform .25s ease;
}
.page-about .ab-team__card:hover {
  background: rgba(255, 255, 255, .22);
  transform: translateY(-3px);
}
.page-about .ab-team__count {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 40px;
  line-height: 1;
  color: var(--gold-light);
  font-variant-numeric: tabular-nums;
}
.page-about .ab-team__name {
  margin: 8px 0 8px;
  font-size: 18px;
  font-weight: 700;
}
.page-about .ab-team__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(243, 239, 228, .78);
}

/* ---------- 节奏 ---------- */
.page-about .ab-rhythm {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .ab-rhythm__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 16px 0;
  border-top: 1px solid rgba(243, 239, 228, .16);
}
.page-about .ab-rhythm__item:first-child {
  border-top: 0;
  padding-top: 0;
}
.page-about .ab-rhythm__time {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 30px;
  line-height: 1;
  color: var(--gold-light);
  font-variant-numeric: tabular-nums;
}
.page-about .ab-rhythm__time em {
  font-style: normal;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .06em;
  margin-left: 4px;
  color: rgba(243, 239, 228, .68);
}
.page-about .ab-rhythm__body h3 {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 700;
}
.page-about .ab-rhythm__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(243, 239, 228, .78);
}

/* ---------- 看台 ---------- */
.page-about .ab-stands {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}
.page-about .ab-stands__media {
  margin: 0;
  border-left: 3px solid var(--wine);
}
.page-about .ab-stands__text p {
  margin: 0 0 16px;
}
.page-about .ab-stands__text p:last-child {
  margin-bottom: 0;
}

/* ---------- 合作 ---------- */
.page-about .ab-partners {
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--ab-line);
}
.page-about .ab-partners__row {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 4px 14px;
  padding: 20px 0;
  border-bottom: 1px solid var(--ab-line);
}
.page-about .ab-partners__idx {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 28px;
  line-height: 1;
  color: var(--kiwi);
  font-variant-numeric: tabular-nums;
}
.page-about .ab-partners__body h3 {
  margin: 0 0 6px;
  font-size: 19px;
  font-weight: 700;
}
.page-about .ab-partners__body p {
  margin: 0;
  max-width: 38em;
  font-size: 15.5px;
  color: var(--ab-text-soft);
}
.page-about .ab-partners__meta {
  grid-column: 2;
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--wine);
}

/* ---------- 年鉴与行动 ---------- */
.page-about .ab-almanac {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .ab-almanac__item {
  flex: 1 1 120px;
  min-width: 0;
  padding: 16px 14px 18px;
  background: linear-gradient(158deg, var(--indigo), var(--teal));
  color: var(--paper);
  clip-path: polygon(6px 0, 100% 0, 100% 100%, 0 100%, 0 6px);
  transition: transform .25s ease;
}
.page-about .ab-almanac__item:hover {
  transform: translateY(-4px);
}
.page-about .ab-almanac__vol {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 30px;
  line-height: 1;
  color: var(--gold-light);
  font-variant-numeric: tabular-nums;
}
.page-about .ab-almanac__season {
  display: block;
  margin-top: 8px;
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: .12em;
  color: rgba(243, 239, 228, .8);
}
.page-about .ab-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.page-about .ab-actions__note {
  margin: 18px 0 0;
  max-width: 40em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ab-text-faint);
}
.page-about .ab-inline-link {
  color: var(--kiwi);
  text-decoration: none;
  border-bottom: 1px solid rgba(70, 155, 63, .45);
}
.page-about .ab-inline-link:hover {
  border-bottom-color: var(--kiwi);
}

/* ---------- 右栏赛季刻度 ---------- */
.page-about .ab-rail {
  padding: 22px 18px 24px;
  background: linear-gradient(180deg, rgba(18, 60, 64, .97), rgba(11, 33, 28, .97));
  color: var(--paper);
  clip-path: polygon(10px 0, 100% 0, 100% 100%, 0 100%, 0 10px);
}
.page-about .ab-rail__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--kiwi-light);
}
.page-about .ab-rail__hint {
  margin: 0 0 18px;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(243, 239, 228, .62);
}
.page-about .ab-rail__list {
  position: relative;
  margin: 0;
  padding: 0 0 0 22px;
  list-style: none;
}
.page-about .ab-rail__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 7px;
  bottom: 7px;
  width: 2px;
  background: linear-gradient(180deg, var(--kiwi-light), rgba(127, 203, 106, .12));
}
.page-about .ab-year {
  position: relative;
  padding-bottom: 20px;
}
.page-about .ab-year:last-child {
  padding-bottom: 0;
}
.page-about .ab-year::before {
  content: "";
  position: absolute;
  left: -21px;
  top: 7px;
  width: 9px;
  height: 9px;
  background: var(--kiwi-light);
  transform: rotate(45deg);
}
.page-about .ab-year__tag {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.1;
  letter-spacing: .06em;
  color: var(--gold-light);
  font-variant-numeric: tabular-nums;
}
.page-about .ab-year__note {
  display: block;
  margin-top: 5px;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(243, 239, 228, .72);
}

/* ---------- 滚动显现（渐进增强） ---------- */
.page-about [data-reveal] {
  opacity: 1;
}
@supports (animation-timeline: view()) {
  .page-about [data-reveal] {
    animation-name: ab-rise;
    animation-timing-function: linear;
    animation-fill-mode: both;
    animation-timeline: view();
    animation-range: entry 2% cover 26%;
  }
}
@keyframes ab-rise {
  from {
    opacity: .15;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .ab-panel {
    padding: 26px 26px 28px;
  }
  .page-about .ab-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .ab-rhythm__item {
    grid-template-columns: 150px minmax(0, 1fr);
    align-items: baseline;
    gap: 8px 20px;
  }
  .page-about .ab-partners__row {
    grid-template-columns: 56px minmax(0, 1fr);
  }
  .page-about .ab-partners__meta {
    grid-column: 2;
  }
}

@media (min-width: 760px) {
  .page-about .ab-hero {
    padding: 60px 0 62px;
  }
  .page-about .ab-split {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 34px;
    align-items: start;
  }
  .page-about .ab-stands {
    grid-template-columns: 268px minmax(0, 1fr);
    gap: 34px;
  }
  .page-about .ab-partners__row {
    grid-template-columns: 56px minmax(0, 1fr) 172px;
    align-items: baseline;
  }
  .page-about .ab-partners__meta {
    grid-column: 3;
    text-align: right;
  }
  .page-about .ab-almanac__item:nth-child(even) {
    margin-top: 14px;
  }
}

@media (min-width: 1080px) {
  .page-about .ab-layout {
    grid-template-columns: minmax(0, 1fr) 236px;
    gap: 68px;
    padding-top: 50px;
    padding-bottom: 76px;
  }
  .page-about .ab-rail {
    position: sticky;
    top: 96px;
    align-self: start;
  }
  .page-about .ab-section {
    padding: 46px 0;
  }
  .page-about .ab-almanac__item {
    flex-basis: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
  .page-about .ab-duo__card,
  .page-about .ab-team__card,
  .page-about .ab-almanac__item {
    transition: none;
  }
  .page-about .ab-duo__card:hover,
  .page-about .ab-team__card:hover,
  .page-about .ab-almanac__item:hover {
    transform: none;
  }
}