.page-about {
  --ab-mesh: rgba(14, 13, 12, .05);
  --ab-mesh-night: rgba(239, 233, 221, .05);
  background: var(--bone);
  color: var(--ink);
}

.page-about [id] {
  scroll-margin-top: 5.5rem;
}

/* ---------- 首屏档案页头 ---------- */
.page-about .ab-head {
  position: relative;
  padding: clamp(2rem, 6vw, 4.5rem) 0 clamp(1.6rem, 4vw, 3rem);
  border-bottom: var(--line);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(217, 162, 39, .18), transparent 58%),
    linear-gradient(180deg, rgba(220, 211, 198, .55), rgba(247, 243, 236, 0) 82%);
}

.page-about .ab-head__title {
  margin: .6rem 0 0;
  max-width: 22ch;
  text-wrap: balance;
}

.page-about .ab-head__lede {
  margin-top: 1rem;
}

.page-about .ab-figures {
  list-style: none;
  margin: clamp(1.6rem, 4vw, 2.6rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--dust);
  border: var(--line);
}

.page-about .ab-figures > li {
  background: var(--paper);
  padding: 1rem 1.05rem 1.15rem;
}

.page-about .ab-figures .num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(1.75rem, 4.4vw, 2.5rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--danxia);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-figures__label {
  display: block;
  margin-top: .45rem;
  font-family: var(--font-display);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--grit);
}

.page-about .ab-toc {
  margin-top: clamp(1.5rem, 4vw, 2.4rem);
  padding-top: 1rem;
  border-top: var(--line);
}

.page-about .ab-toc .toc__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--grit);
}

.page-about .ab-toc .toc__list {
  list-style: none;
  margin: .7rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .45rem .95rem;
}

.page-about .ab-toc .toc__link {
  font-family: var(--font-display);
  font-size: .84rem;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

/* ---------- 通用区块 ---------- */
.page-about .ab-section {
  padding: clamp(2.6rem, 7vw, 5rem) 0;
}

.page-about .ab-section--dust {
  background: rgba(220, 211, 198, .36);
  border-top: var(--line);
  border-bottom: var(--line);
}

.page-about .ab-section--grid {
  background-image:
    linear-gradient(var(--ab-mesh) 1px, transparent 1px),
    linear-gradient(90deg, var(--ab-mesh) 1px, transparent 1px);
  background-size: 34px 34px;
}

.page-about .ab-sechead {
  max-width: 46rem;
  margin-bottom: clamp(1.5rem, 4vw, 2.4rem);
}

.page-about .ab-sechead__lede {
  margin: .75rem 0 0;
  max-width: 34em;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.78;
  color: rgba(14, 13, 12, .72);
}

.page-about .ab-more {
  margin: 1.4rem 0 0;
}

.page-about .ab-after {
  margin: 1.3rem 0 0;
  max-width: 46em;
  font-family: var(--font-body);
  font-size: .94rem;
  line-height: 1.78;
  color: rgba(14, 13, 12, .74);
}

.page-about .prose p {
  font-family: var(--font-body);
  font-size: .97rem;
  line-height: 1.82;
  color: rgba(14, 13, 12, .78);
}

/* ---------- 分栏 ---------- */
.page-about .ab-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: start;
}

.page-about .ab-split__main,
.page-about .ab-split__side {
  min-width: 0;
}

/* ---------- 发展时间轴 ---------- */
.page-about .ab-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 2.4rem;
  border-left: 2px solid var(--dust);
  display: grid;
  gap: clamp(1.4rem, 3vw, 2rem);
}

.page-about .ab-timeline__item {
  position: relative;
  padding-right: .5rem;
  transition: transform var(--dur) var(--ease);
}

.page-about .ab-timeline__item::before {
  content: "";
  position: absolute;
  top: .42rem;
  left: -2.4rem;
  width: 11px;
  height: 11px;
  transform: translateX(-50%);
  border-radius: 50%;
  background: var(--bone);
  border: 2px solid var(--danxia);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .ab-timeline__item:hover {
  transform: translateX(2px);
}

.page-about .ab-timeline__item:hover::before {
  background: var(--danxia);
  box-shadow: 0 0 0 5px rgba(178, 58, 31, .14);
}

.page-about .ab-timeline__year {
  display: inline-block;
  margin-bottom: .35rem;
  font-family: var(--font-num);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--danxia);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-timeline__title {
  margin: 0 0 .4rem;
  font-family: var(--font-display);
  font-size: clamp(1.02rem, 2.2vw, 1.2rem);
  font-weight: 700;
  letter-spacing: -.015em;
  transition: color var(--dur) var(--ease);
}

.page-about .ab-timeline__item:hover .ab-timeline__title {
  color: var(--danxia);
}

.page-about .ab-timeline__text {
  margin: 0;
  max-width: 42em;
  font-family: var(--font-body);
  font-size: .95rem;
  line-height: 1.8;
  color: rgba(14, 13, 12, .74);
}

/* ---------- 查询路径清单 ---------- */
.page-about .ab-keys {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  border-top: var(--line);
}

.page-about .ab-keys li {
  padding: .75rem 0;
  border-bottom: var(--line);
  font-family: var(--font-body);
  font-size: .93rem;
  line-height: 1.72;
  color: rgba(14, 13, 12, .76);
}

.page-about .ab-keys__k {
  display: inline-block;
  min-width: 4.4rem;
  margin-right: .5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .86rem;
  letter-spacing: .02em;
  color: var(--danxia);
}

/* ---------- 图像与旁注 ---------- */
.page-about .ab-media {
  margin: 0;
}

.page-about .ab-media img,
.page-about .ab-banner img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: var(--line);
  border-radius: var(--radius);
  background: var(--dust);
  object-fit: cover;
}

.page-about .ab-media__caption {
  display: block;
  margin-top: .6rem;
  font-family: var(--font-body);
  font-size: .8rem;
  line-height: 1.65;
  color: var(--grit);
}

.page-about .ab-note {
  margin-top: 1.25rem;
  padding: .95rem 1.05rem 1.1rem;
  background: var(--paper);
  border-left: 3px solid var(--sand);
}

.page-about .ab-note--pitch {
  border-left-color: var(--pitch);
}

.page-about .ab-note__num {
  display: block;
  font-family: var(--font-num);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-note p {
  margin: .45rem 0 0;
  font-family: var(--font-body);
  font-size: .85rem;
  line-height: 1.68;
  color: rgba(14, 13, 12, .7);
}

/* ---------- 深色团队区 ---------- */
.page-about .ab-nightsection {
  background-color: var(--night);
  background-image:
    linear-gradient(var(--ab-mesh-night) 1px, transparent 1px),
    linear-gradient(90deg, var(--ab-mesh-night) 1px, transparent 1px);
  background-size: 34px 34px;
  color: var(--night-fg);
}

.page-about .ab-nightsection .kicker {
  color: var(--sand);
}

.page-about .ab-nightsection .ab-sechead__lede {
  color: rgba(239, 233, 221, .74);
}

.page-about .ab-banner {
  margin: 0 0 clamp(1.5rem, 4vw, 2.25rem);
}

.page-about .ab-nightsection .ab-media__caption {
  color: rgba(239, 233, 221, .58);
}

.page-about .ab-crew {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: rgba(239, 233, 221, .18);
  border: 1px solid rgba(239, 233, 221, .18);
}

.page-about .ab-crew__cell {
  background: var(--night);
  padding: 1.3rem 1.15rem 1.5rem;
  transition: background var(--dur) var(--ease);
}

.page-about .ab-crew__cell:hover,
.page-about .ab-crew__cell:focus-within,
.page-about .ab-crew__cell:focus {
  background: var(--night-2);
}

.page-about .ab-crew__cell:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -2px;
}

.page-about .ab-crew__cell::before {
  content: "";
  display: block;
  width: 30px;
  height: 3px;
  margin-bottom: .85rem;
  background: var(--danxia);
}

.page-about .ab-crew__cell:nth-child(2)::before {
  background: var(--sand);
}

.page-about .ab-crew__cell:nth-child(3)::before {
  background: var(--pitch);
}

.page-about .ab-crew__cell:nth-child(4)::before {
  background: var(--lime);
}

.page-about .ab-crew__title {
  margin: 0 0 .32rem;
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: -.015em;
  color: var(--night-fg);
}

.page-about .ab-crew__role {
  margin: 0 0 .7rem;
  font-family: var(--font-display);
  font-size: .74rem;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--sand);
}

.page-about .ab-crew__detail {
  margin: 0;
  font-family: var(--font-body);
  font-size: .88rem;
  line-height: 1.76;
  color: rgba(239, 233, 221, .74);
}

.page-about .ab-crew__foot {
  margin: clamp(1.3rem, 3vw, 1.9rem) 0 0;
  max-width: 48em;
  padding-left: 1rem;
  border-left: 2px solid var(--lime);
  font-family: var(--font-body);
  font-size: .92rem;
  line-height: 1.78;
  color: rgba(239, 233, 221, .8);
}

/* ---------- 青训年龄组 ---------- */
.page-about .ab-squad-list {
  margin-top: clamp(1.25rem, 3vw, 1.75rem);
  display: grid;
  gap: .55rem;
}

.page-about .ab-squad {
  background: var(--paper);
  border: var(--line);
  border-radius: var(--radius);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .ab-squad[open] {
  border-color: rgba(178, 58, 31, .38);
  box-shadow: 0 1px 0 rgba(14, 13, 12, .05);
}

.page-about .ab-squad:hover {
  border-color: rgba(14, 13, 12, .3);
}

.page-about .ab-squad__summary {
  display: flex;
  align-items: center;
  gap: .65rem;
  padding: .8rem 1rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: .98rem;
  font-weight: 700;
  letter-spacing: -.008em;
}

.page-about .ab-squad__summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-squad__summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-num);
  font-size: 1rem;
  color: var(--grit);
}

.page-about .ab-squad[open] .ab-squad__summary::after {
  content: "－";
}

.page-about .ab-squad__summary:focus-visible {
  outline: 2px solid var(--danxia);
  outline-offset: -2px;
}

.page-about .ab-squad__code {
  flex: 0 0 auto;
  padding: .18rem .5rem;
  border-radius: var(--radius);
  font-family: var(--font-num);
  font-size: .95rem;
  font-weight: 700;
  letter-spacing: .04em;
  line-height: 1.4;
}

.page-about .ab-squad__name {
  color: var(--ink);
}

.page-about .ab-squad__stage {
  font-family: var(--font-body);
  font-size: .76rem;
  font-weight: 400;
  letter-spacing: .02em;
  color: var(--grit);
}

.page-about .ab-squad--u13 .ab-squad__code {
  background: var(--sand);
  color: var(--ink);
}

.page-about .ab-squad--u15 .ab-squad__code {
  background: var(--danxia);
  color: var(--night-fg);
}

.page-about .ab-squad--u17 .ab-squad__code {
  background: var(--night-2);
  color: var(--night-fg);
}

.page-about .ab-squad--u19 .ab-squad__code {
  background: var(--pitch);
  color: var(--night-fg);
}

.page-about .ab-squad__panel {
  padding: 0 1rem 1.05rem;
  border-top: var(--line);
}

.page-about .ab-squad__panel dl {
  margin: .85rem 0 0;
  display: grid;
  gap: .6rem;
}

.page-about .ab-squad__panel dt {
  font-family: var(--font-display);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--danxia);
}

.page-about .ab-squad__panel dd {
  margin: .22rem 0 0;
  font-family: var(--font-body);
  font-size: .9rem;
  line-height: 1.74;
  color: rgba(14, 13, 12, .75);
}

/* ---------- 更新节奏表 ---------- */
.page-about .ab-tablewrap {
  overflow-x: auto;
  border: var(--line);
  background: var(--paper);
}

.page-about .ab-table {
  width: 100%;
  min-width: 34rem;
}

/* ---------- 合作与荣誉 ---------- */
.page-about .ab-partner-list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: .55rem;
}

.page-about .ab-partner-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .6rem;
  padding-bottom: .6rem;
  border-bottom: var(--line);
  font-family: var(--font-body);
  font-size: .93rem;
  line-height: 1.74;
  color: rgba(14, 13, 12, .78);
}

.page-about .ab-cta {
  padding: 1.4rem 1.25rem 1.6rem;
  background: var(--night);
  color: var(--night-fg);
  border-radius: var(--radius);
  border-top: 3px solid var(--danxia);
}

.page-about .ab-cta__kicker {
  margin: 0 0 .65rem;
  font-family: var(--font-display);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--lime);
}

.page-about .ab-cta p {
  margin: 0;
  font-family: var(--font-body);
  font-size: .92rem;
  line-height: 1.78;
  color: rgba(239, 233, 221, .84);
}

.page-about .ab-cta__actions {
  margin-top: 1.1rem;
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
}

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

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

@media (min-width: 720px) {
  .page-about .ab-squad__panel dl {
    grid-template-columns: 4.6rem minmax(0, 1fr);
    gap: .55rem 1.1rem;
  }

  .page-about .ab-squad__panel dt {
    padding-top: .18rem;
  }

  .page-about .ab-squad__panel dd {
    margin: 0;
  }
}

@media (min-width: 980px) {
  .page-about .ab-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(2rem, 4.5vw, 3.5rem);
  }

  .page-about .ab-cta {
    position: sticky;
    top: 6rem;
  }
}

@media (min-width: 1120px) {
  .page-about .ab-crew {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-timeline__item,
  .page-about .ab-timeline__item::before,
  .page-about .ab-crew__cell,
  .page-about .ab-squad,
  .page-about .ab-toc .toc__link {
    transition: none;
  }

  .page-about .ab-timeline__item:hover {
    transform: none;
  }
}