.page-about {
  --ab-hair: rgba(43, 33, 28, .15);
  --ab-ink-soft: #5C4B41;
  counter-reset: absec;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
}

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

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.2;
  margin: 0;
}

.page-about .ab-num {
  display: inline-block;
  margin-right: 10px;
  padding-right: 10px;
  border-right: 2px solid var(--ochre);
  color: var(--ochre);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 13px;
  letter-spacing: .06em;
  vertical-align: 1px;
}

.page-about .ab-num--light {
  color: var(--gold);
  border-right-color: var(--gold);
}

.page-about .ab-head__lede {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ab-ink-soft);
}

.page-about .ab-cover__cap {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ab-ink-soft);
  padding-left: 12px;
  border-left: 3px solid var(--ochre);
}

/* ---------- 封面 ---------- */
.page-about .ab-cover {
  padding: calc(var(--header-h) + 26px) 0 30px;
  background-color: var(--cream);
  background-image:
    radial-gradient(circle at 84% 10%, rgba(95, 211, 196, .26), transparent 46%),
    radial-gradient(circle at 4% 2%, rgba(201, 111, 59, .22), transparent 54%),
    repeating-linear-gradient(45deg, rgba(43, 33, 28, .05) 0 1px, transparent 1px 15px);
  border-bottom: 2px solid var(--ab-hair);
}

.page-about .ab-cover__inner {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .breadcrumbs {
  font-size: 13px;
  margin-bottom: 18px;
}

.page-about .breadcrumbs a {
  color: var(--lake);
  text-decoration: none;
}

.page-about .breadcrumbs a:hover {
  text-decoration: underline;
}

.page-about .breadcrumbs__sep {
  margin: 0 6px;
  color: var(--ochre);
}

.page-about .ab-cover__grid {
  display: grid;
  gap: 26px;
}

.page-about .ab-cover__lead h1 {
  margin: 10px 0 0;
  font-size: clamp(30px, 7vw, 58px);
  font-weight: 900;
  line-height: 1.12;
  color: var(--ink);
  text-shadow: 2px 2px 0 rgba(217, 164, 65, .35);
}

.page-about .ab-cover__sub {
  margin: 16px 0 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.9;
  color: var(--ab-ink-soft);
}

.page-about .ab-cover__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .ab-cover__stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
}

.page-about .ab-cover__stats li {
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  box-shadow: var(--shadow-paper);
}

.page-about .ab-cover__stats strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 26px;
  line-height: 1.1;
  color: var(--lake);
}

.page-about .ab-cover__stats span {
  display: block;
  margin-top: 2px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ab-ink-soft);
}

.page-about .ab-cover__figure {
  margin: 0;
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  padding: 10px;
  box-shadow: var(--shadow-paper);
}

.page-about .ab-cover__figure img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  object-fit: cover;
}

/* ---------- 年份索引 ---------- */
.page-about .ab-yearnav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
  padding-top: 16px;
  border-top: 2px dashed var(--ab-hair);
}

.page-about .ab-yearnav__label {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ab-ink-soft);
  margin-right: 4px;
}

.page-about .ab-yearnav a {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  border: 2px solid var(--lake);
  color: var(--lake);
  background: var(--paper);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  transition: background .2s ease, color .2s ease, transform .2s ease;
}

.page-about .ab-yearnav a:hover,
.page-about .ab-yearnav a:focus-visible {
  background: var(--lake);
  color: var(--paper);
  transform: translateY(-2px);
}

/* ---------- 时间轴 ---------- */
.page-about .ab-timeline {
  background: var(--cream);
}

.page-about .ab-tl {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
}

.page-about .ab-tl__item {
  position: relative;
  padding-left: 30px;
  padding-bottom: 26px;
}

.page-about .ab-tl__item::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 12px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--ochre), rgba(201, 111, 59, .12));
}

.page-about .ab-tl__item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--ochre);
}

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

.page-about .ab-tl__year {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 9vw, 58px);
  line-height: .92;
  letter-spacing: -.03em;
  color: var(--ochre);
  -webkit-text-stroke: 1px var(--paper);
  margin-bottom: 8px;
}

.page-about .ab-tl__card {
  padding: 16px 18px;
  background: var(--paper);
}

.page-about .ab-tl__card h3 {
  font-size: 19px;
  line-height: 1.35;
  color: var(--lake-deep);
}

.page-about .ab-tl__card p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ab-ink-soft);
}

.page-about .ab-tl__tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 14px 0 0;
  padding: 0;
}

/* ---------- 目录方法 ---------- */
.page-about .ab-method {
  background: var(--paper);
  border-top: 2px solid var(--ab-hair);
  border-bottom: 2px solid var(--ab-hair);
}

.page-about .ab-method__grid {
  display: grid;
  gap: 30px;
}

.page-about .ab-method__list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .ab-method__list li {
  position: relative;
  padding-left: 26px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ab-ink-soft);
}

.page-about .ab-method__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: var(--ochre);
  box-shadow: 3px 3px 0 rgba(217, 164, 65, .55);
}

.page-about .ab-method__list strong {
  color: var(--ink);
  font-weight: 700;
}

.page-about .ab-method__side {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.page-about .ab-method__figure {
  margin: 0;
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  padding: 10px;
  box-shadow: var(--shadow-paper);
}

.page-about .ab-method__figure img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  object-fit: cover;
}

.page-about .ab-method__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .ab-stat {
  background: var(--peach);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  border-left: 4px solid var(--ochre);
}

.page-about .ab-stat__n {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 24px;
  line-height: 1.1;
  color: var(--lake-deep);
}

.page-about .ab-stat__l {
  display: block;
  margin-top: 3px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ab-ink-soft);
}

/* ---------- 订阅 ---------- */
.page-about .ab-sub {
  padding: clamp(38px, 7vw, 68px) 0;
  background-color: var(--lake-deep);
  background-image:
    repeating-linear-gradient(135deg, rgba(255, 249, 239, .06) 0 2px, transparent 2px 13px),
    radial-gradient(circle at 90% 0%, rgba(217, 164, 65, .22), transparent 48%);
  color: var(--paper);
}

.page-about .ab-sub__inner {
  display: grid;
  gap: 30px;
}

.page-about .ab-eyebrow--light {
  color: var(--gold);
}

.page-about .ab-sub h2 {
  margin: 12px 0 0;
  font-size: clamp(24px, 5vw, 36px);
  color: var(--paper);
}

.page-about .ab-sub__lede {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(255, 249, 239, .86);
}

.page-about .ab-sub__list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-sub__list li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 249, 239, .9);
}

.page-about .ab-sub__list li::before {
  content: "◆";
  position: absolute;
  left: 0;
  top: 2px;
  font-size: 10px;
  color: var(--gold);
}

.page-about .ab-sub__metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 24px 0 0;
}

.page-about .ab-sub__metrics > div {
  padding: 10px 0 10px 12px;
  border-left: 2px solid rgba(217, 164, 65, .65);
}

.page-about .ab-sub__n {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 22px;
  line-height: 1.1;
  color: var(--neon);
}

.page-about .ab-sub__l {
  display: block;
  margin-top: 3px;
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(255, 249, 239, .74);
}

.page-about .ab-sub .btn {
  margin-top: 24px;
}

.page-about .ab-sub__figure {
  margin: 0;
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  padding: 10px;
  box-shadow: var(--shadow-lift);
}

.page-about .ab-sub__figure img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  object-fit: cover;
}

.page-about .ab-cover__cap--light {
  color: var(--ab-ink-soft);
  border-left-color: var(--gold);
}

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

.page-about .ab-team__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 30px;
}

.page-about .ab-team__cell {
  padding: 16px 14px;
  background: var(--paper);
}

.page-about .ab-team__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 28px;
  line-height: 1;
  color: var(--lake);
}

.page-about .ab-team__cell h3 {
  margin-top: 8px;
  font-size: 16px;
  color: var(--ink);
}

.page-about .ab-team__cell p {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ab-ink-soft);
}

.page-about .ab-team__cell.card--accent {
  background: var(--indigo);
  border-color: var(--indigo);
}

.page-about .ab-team__cell.card--accent .ab-team__num {
  color: var(--neon);
}

.page-about .ab-team__cell.card--accent h3 {
  color: var(--paper);
}

.page-about .ab-team__cell.card--accent p {
  color: rgba(255, 249, 239, .82);
}

/* ---------- 荣誉 ---------- */
.page-about .ab-honor {
  background: var(--cream);
}

.page-about .ab-seals {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 30px;
}

.page-about .ab-seal {
  position: relative;
  background: var(--paper);
  border: 2px dashed var(--gold);
  border-radius: 14px;
  padding: 16px 18px;
  box-shadow: var(--shadow-paper);
  transition: box-shadow .25s ease, border-color .25s ease, transform .25s ease;
  outline: none;
}

.page-about .ab-seal:nth-child(odd) {
  transform: rotate(-.8deg);
}

.page-about .ab-seal:hover,
.page-about .ab-seal:focus-visible {
  transform: rotate(-.8deg) translateY(-3px);
  border-color: var(--ochre);
  box-shadow: var(--shadow-lift);
}

.page-about .ab-seal h3 {
  margin-top: 10px;
  font-size: 17px;
  color: var(--lake-deep);
}

.page-about .ab-seal__note {
  margin: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ab-ink-soft);
  transition: max-height .32s ease, opacity .28s ease, margin-top .28s ease;
}

.page-about .ab-seal:hover .ab-seal__note,
.page-about .ab-seal:focus .ab-seal__note,
.page-about .ab-seal:focus-within .ab-seal__note {
  max-height: 220px;
  opacity: 1;
  margin-top: 10px;
}

/* ---------- 联系 ---------- */
.page-about .ab-contact {
  background: var(--peach);
  border-top: 2px solid var(--ab-hair);
}

.page-about .ab-contact__grid {
  display: grid;
  gap: 12px;
  margin-top: 30px;
}

.page-about .ab-contact__item {
  padding: 18px;
  background: var(--paper);
}

.page-about .ab-contact__item h3 {
  font-size: 15px;
  letter-spacing: .04em;
  color: var(--ochre);
}

.page-about .ab-contact__value {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.5;
  color: var(--lake-deep);
  word-break: break-word;
}

.page-about .ab-contact__item p:last-child {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ab-ink-soft);
}

.page-about .ab-contact__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 2px dashed rgba(43, 33, 28, .22);
}

.page-about .ab-contact__foot p {
  margin: 0;
  flex: 1 1 260px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ab-ink-soft);
}

/* ---------- 桌面 ---------- */
@media (min-width: 760px) {
  .page-about .ab-cover__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .ab-cover__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: 40px;
  }

  .page-about .ab-cover {
    padding: calc(var(--header-h) + 40px) 0 40px;
  }

  .page-about .ab-method__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .ab-sub__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 44px;
    align-items: center;
  }

  .page-about .ab-contact__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .ab-tl__item {
    display: grid;
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 30px;
    padding-left: 0;
    padding-bottom: 30px;
  }

  .page-about .ab-tl__item::before {
    left: 160px;
    top: 16px;
    bottom: 0;
  }

  .page-about .ab-tl__item::after {
    left: 153px;
    top: 18px;
  }

  .page-about .ab-tl__year {
    margin-bottom: 0;
    text-align: right;
    font-size: clamp(44px, 4.6vw, 64px);
  }
}

@media (min-width: 1120px) {
  .page-about .ab-tl__item {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 40px;
  }

  .page-about .ab-tl__item::before {
    left: 200px;
  }

  .page-about .ab-tl__item::after {
    left: 193px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-seal,
  .page-about .ab-seal__note,
  .page-about .ab-yearnav a {
    transition: none;
  }

  .page-about .ab-seal:nth-child(odd) {
    transform: none;
  }

  .page-about .ab-seal:hover {
    transform: none;
  }
}
<<<END>>>