/* ===== 卷宗编年 /history/ 页面专属样式 ===== */
.page-about {
  --ab-r: 2px 18px 2px 18px;
  --ab-r-sm: 2px 12px 2px 12px;
  --ab-gap: clamp(18px, 3.6vw, 40px);
  display: block;
  background: var(--paper);
  color: var(--blue-deep);
}

.page-about .ab-sec {
  padding: clamp(44px, 7.5vw, 88px) 0;
}

.page-about .grid-12 {
  row-gap: clamp(22px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  padding-top: clamp(14px, 2.6vw, 26px);
  padding-bottom: clamp(26px, 4.5vw, 50px);
}

.page-about .ab-hero .crumbs {
  margin-bottom: clamp(14px, 2vw, 22px);
}

.page-about .ab-hero__stack {
  display: block;
}

.page-about .ab-hero__frame {
  margin: 0;
  border-radius: var(--ab-r);
  overflow: hidden;
  background: var(--blue);
}

.page-about .ab-hero__frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  object-position: center 42%;
}

.page-about .ab-hero__panel {
  position: relative;
  z-index: 2;
  margin-top: 14px;
  padding: clamp(22px, 4.2vw, 48px) clamp(20px, 4vw, 52px);
  border-radius: var(--ab-r);
  background: linear-gradient(158deg, var(--panel-a) 0%, var(--panel-b) 100%);
  color: var(--paper);
  overflow: hidden;
}

.page-about .ab-hero__panel::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -90px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 90, 31, .30) 0%, transparent 68%);
  pointer-events: none;
}

.page-about .ab-hero__panel .kicker {
  color: var(--orange);
  letter-spacing: .16em;
  margin: 0;
}

.page-about .ab-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(30px, 6.4vw, 60px);
  line-height: 1.08;
  letter-spacing: -.012em;
  text-wrap: balance;
}

.page-about .ab-hero__lede {
  max-width: 62ch;
  margin: 16px 0 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: rgba(244, 241, 234, .8);
}

.page-about .ab-hero__btn {
  margin-top: clamp(20px, 2.6vw, 28px);
}

/* 首屏数据带 */
.page-about .ab-figures {
  list-style: none;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--ab-r);
  overflow: hidden;
}

.page-about .ab-figures .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(14px, 2.4vw, 24px);
  background: var(--paper);
}

.page-about .ab-figures .stat__value {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(24px, 4vw, 38px);
  line-height: 1;
}

.page-about .ab-figures .stat__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--slate);
}

/* 章节跳转条 */
.page-about .ab-jump {
  margin-top: clamp(22px, 3.2vw, 36px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-about .ab-jump__list {
  list-style: none;
  display: flex;
  gap: clamp(16px, 2.4vw, 30px);
  margin: 0;
  padding: 12px 2px;
  white-space: nowrap;
}

.page-about .ab-jump__list a {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--slate);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}

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

/* ---------- 起点 ---------- */
.page-about .section-head {
  margin-bottom: clamp(20px, 2.8vw, 30px);
}

.page-about .section-head__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(26px, 4.4vw, 44px);
  line-height: 1.12;
  letter-spacing: -.01em;
  margin: 8px 0 0;
  color: var(--blue);
}

.page-about .section-head__note {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--slate);
  max-width: 56ch;
}

.page-about .ab-copy,
.page-about .prose {
  max-width: 68ch;
}

.page-about .ab-note-card {
  padding: clamp(20px, 3vw, 28px);
  border-radius: var(--ab-r);
  background: var(--blue);
  color: var(--paper);
  position: relative;
  overflow: hidden;
}

.page-about .ab-note-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(244, 241, 234, .14) 1px, transparent 1px);
  background-size: 10px 10px;
  pointer-events: none;
}

.page-about .ab-note-card .v-note {
  margin: 0;
  color: rgba(244, 241, 234, .62);
}

.page-about .ab-note-card__big {
  margin: 12px 0 0;
  font-size: clamp(56px, 9vw, 88px);
  line-height: .92;
  font-weight: 500;
  color: var(--orange);
}

.page-about .ab-note-card__cap {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(244, 241, 234, .74);
}

/* ---------- 分卷原则 ---------- */
.page-about .ab-why {
  background: var(--steel);
}

.page-about .ab-why__lead {
  margin-bottom: clamp(24px, 3.4vw, 40px);
}

.page-about .ab-plates {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .ab-plate {
  position: relative;
  padding: clamp(20px, 2.8vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--ab-r);
  background: var(--paper);
  transition: border-color .2s ease, transform .2s ease;
}

.page-about .ab-plate::after {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  width: 4px;
  height: 34px;
  border-radius: 0 3px 3px 0;
  background: var(--slate);
}

.page-about .ab-plate--start::after {
  background: var(--orange);
}

.page-about .ab-plate--exp::after {
  background: var(--violet);
}

.page-about .ab-plate--wide::after {
  background: var(--pitch);
}

.page-about .ab-plate:hover {
  border-color: var(--orange);
  transform: translateY(-2px);
}

.page-about .ab-plate__tag {
  margin: 0;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--slate);
}

.page-about .ab-plate__name {
  margin: 8px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(22px, 2.8vw, 28px);
  line-height: 1.16;
  color: var(--blue);
}

.page-about .ab-plate__note {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--blue-deep);
}

.page-about .ab-plate__foot {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  color: var(--slate);
}

.page-about .ab-plate__foot .mono {
  color: var(--orange);
  font-size: 15px;
}

/* ---------- 四册 ---------- */
.page-about .ab-booklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .ab-book {
  padding: clamp(20px, 2.8vw, 26px);
  border-radius: var(--ab-r);
  background: var(--paper);
  border: 1px solid var(--line);
  border-top-width: 4px;
}

.page-about .ab-book--player { border-top-color: var(--orange); }
.page-about .ab-book--injury { border-top-color: var(--amber); }
.page-about .ab-book--run { border-top-color: var(--pitch); }
.page-about .ab-book--corner { border-top-color: var(--violet); }

.page-about .ab-book__no {
  margin: 0;
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--slate);
}

.page-about .ab-book__title {
  margin: 8px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.2;
  color: var(--blue);
}

.page-about .ab-book__text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.72;
}

.page-about .ab-book__owner {
  margin: 14px 0 0;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--slate);
}

.page-about .ab-books__cadence {
  margin-top: clamp(24px, 3.4vw, 38px);
  background: linear-gradient(120deg, var(--panel-a), var(--panel-b));
  border-radius: var(--ab-r);
  color: var(--paper);
}

.page-about .ab-books__cadence .rule-band__inner {
  padding: clamp(20px, 3vw, 30px) clamp(20px, 3.4vw, 38px);
}

.page-about .ab-books__cadence-t {
  margin: 0;
  font-size: clamp(14px, 1.6vw, 16px);
  line-height: 1.8;
  color: rgba(244, 241, 234, .86);
  max-width: 62ch;
}

.page-about .ab-books__cadence-t .mono {
  color: var(--orange);
  font-weight: 500;
}

/* ---------- 编年时间线 ---------- */
.page-about .ab-timeline-sec {
  background: var(--paper);
}

.page-about .ab-timeline {
  list-style: none;
  margin: clamp(24px, 3.4vw, 38px) 0 0;
  padding: 0;
}

.page-about .ab-node {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding-left: 36px;
  padding-bottom: clamp(26px, 3.4vw, 40px);
}

.page-about .ab-node::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 16px;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

.page-about .ab-node:last-child::before {
  display: none;
}

.page-about .ab-node::after {
  content: "";
  position: absolute;
  left: 1px;
  top: 6px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--slate);
  box-sizing: border-box;
}

.page-about .ab-node--a::after { border-color: var(--orange); }
.page-about .ab-node--b::after { border-color: var(--violet); }
.page-about .ab-node--c::after { border-color: var(--pitch); }

.page-about .ab-node--now::after {
  border-color: var(--orange);
  background: var(--orange);
}

.page-about .ab-node__side {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .ab-node__no {
  font-size: 15px;
  color: var(--slate);
  letter-spacing: .04em;
}

.page-about .ab-node--now .ab-node__no {
  color: var(--orange);
}

.page-about .ab-node__when {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--slate);
}

.page-about .ab-node__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(20px, 2.8vw, 28px);
  line-height: 1.2;
  color: var(--blue);
}

.page-about .ab-node__text {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--blue-deep);
  max-width: 62ch;
}

.page-about .ab-node__datum {
  display: inline-block;
  margin: 12px 0 0;
  padding: 5px 12px;
  border-radius: var(--ab-r-sm);
  background: var(--steel);
  font-size: 13px;
  color: var(--blue);
}

.page-about .ab-node__datum .mono {
  color: var(--orange);
  font-weight: 500;
}

.page-about .ab-break {
  position: relative;
  padding-left: 36px;
  padding-bottom: clamp(26px, 3.4vw, 40px);
  list-style: none;
}

.page-about .ab-break__frame {
  margin: 0;
  border-radius: var(--ab-r);
  overflow: hidden;
  background: var(--steel);
}

.page-about .ab-break__frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 5;
  object-fit: cover;
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  background: var(--steel);
}

.page-about .ab-team__facts {
  list-style: none;
  margin: clamp(20px, 2.8vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-team__facts li {
  padding: 12px 16px;
  border-left: 3px solid var(--pitch);
  border-radius: 0 var(--ab-r-sm) var(--ab-r-sm) 0;
  background: var(--paper);
  font-size: 14px;
  line-height: 1.6;
}

.page-about .ab-team__facts .mono {
  font-size: 16px;
  color: var(--blue);
  font-weight: 500;
}

.page-about .ab-team__media {
  margin: 0;
  border-radius: var(--ab-r);
  overflow: hidden;
  background: var(--blue);
}

.page-about .ab-team__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

/* ---------- 共建 ---------- */
.page-about .ab-join__panel {
  padding: clamp(24px, 4vw, 48px);
  border-radius: var(--ab-r);
  background: linear-gradient(150deg, var(--blue) 0%, var(--panel-b) 100%);
  color: var(--paper);
  position: relative;
  overflow: hidden;
}

.page-about .ab-join__panel::before {
  content: "";
  position: absolute;
  right: -80px;
  top: -60px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(123, 77, 255, .28) 0%, transparent 70%);
  pointer-events: none;
}

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

.page-about .ab-join__head .kicker {
  color: var(--orange);
  margin: 0;
}

.page-about .ab-join__head .section-head__title {
  color: var(--paper);
}

.page-about .ab-join__body {
  position: relative;
  z-index: 1;
  margin-top: clamp(18px, 2.4vw, 26px);
}

.page-about .ab-join__body .prose p {
  color: rgba(244, 241, 234, .82);
}

.page-about .ab-join__body .prose p:first-child {
  margin-top: 0;
}

.page-about .ab-chips {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .ab-chip {
  padding: 7px 14px;
  border-radius: var(--ab-r-sm);
  border: 1px solid rgba(217, 226, 240, .26);
  background: rgba(217, 226, 240, .08);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--paper);
}

.page-about .ab-join__actions {
  position: relative;
  z-index: 1;
  margin-top: clamp(22px, 3vw, 32px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .ab-join__tail {
  position: relative;
  z-index: 1;
  margin: 20px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(244, 241, 234, .66);
}

.page-about .ab-join__tail a {
  color: var(--orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 90, 31, .5);
  padding-bottom: 1px;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .ab-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-booklist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__frame img {
    aspect-ratio: 2 / 1;
  }

  .page-about .ab-hero__panel {
    margin-top: -120px;
    margin-left: 5%;
    margin-right: auto;
    max-width: 780px;
  }

  .page-about .ab-plates {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 26px;
    padding-bottom: 38px;
  }

  .page-about .ab-plate:nth-child(2) {
    transform: translateY(34px);
  }

  .page-about .ab-plate:nth-child(3) {
    transform: translateY(-8px);
  }

  .page-about .ab-plate:nth-child(4) {
    transform: translateY(26px);
  }

  .page-about .ab-plate:hover {
    transform: translateY(calc(var(--ab-plate-y, 0px) - 2px));
  }

  .page-about .ab-plate--wide {
    grid-column: 1 / -1;
  }

  .page-about .ab-node {
    grid-template-columns: 140px minmax(0, 1fr);
    gap: 0 32px;
    padding-left: 48px;
    padding-bottom: clamp(34px, 3.6vw, 48px);
  }

  .page-about .ab-node::before {
    left: 8px;
  }

  .page-about .ab-node__side {
    flex-direction: column;
    align-items: flex-end;
    text-align: right;
    gap: 4px;
    padding-top: 4px;
  }

  .page-about .ab-node__no {
    font-size: 40px;
    line-height: 1;
    color: var(--line-darker);
    color: rgba(91, 107, 132, .55);
  }

  .page-about .ab-node--now .ab-node__no {
    color: var(--orange);
  }

  .page-about .ab-break {
    padding-left: 48px;
  }

  .page-about .ab-team__grid {
    align-items: start;
  }
}

@media (min-width: 1180px) {
  .page-about .ab-hero__panel {
    margin-left: 8%;
    max-width: 860px;
  }

  .page-about .ab-plates {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .ab-plate:nth-child(1) { grid-column: 1 / span 3; }
  .page-about .ab-plate:nth-child(2) { grid-column: 4 / span 3; }
  .page-about .ab-plate:nth-child(3) { grid-column: 1 / span 2; }
  .page-about .ab-plate:nth-child(4) {
    grid-column: 3 / span 4;
    transform: translateY(28px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-plate,
  .page-about .ab-jump__list a,
  .page-about .ab-join__tail a {
    transition: none;
  }

  .page-about .ab-plate:hover,
  .page-about .ab-plate:nth-child(2),
  .page-about .ab-plate:nth-child(3),
  .page-about .ab-plate:nth-child(4) {
    transform: none;
  }
}
<<<END>>>

.page-about {
  --ab-plate-y: inherit;
}