.page-about {
  background: var(--cream);
  color: var(--brown);
  font-family: var(--font-body);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  letter-spacing: -.02em;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-h) + 44px) 0 clamp(46px, 7vw, 84px);
  background:
    radial-gradient(92% 72% at 84% 0%, rgba(201, 255, 61, .18), rgba(201, 255, 61, 0) 62%),
    linear-gradient(155deg, var(--ink) 0%, #071913 56%, var(--charcoal) 100%);
  color: var(--cream);
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  left: -12%;
  right: -12%;
  bottom: -16%;
  height: 46%;
  background-image: repeating-linear-gradient(102deg, rgba(201, 255, 61, .07) 0 2px, transparent 2px 30px);
  transform: rotate(-2.5deg);
  pointer-events: none;
  z-index: 0;
}

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

.page-about .ab-hero .breadcrumbs {
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-about .ab-hero__head {
  max-width: 860px;
}

.page-about .ab-hero__title {
  margin: 16px 0 0;
  font-weight: 900;
  font-size: clamp(38px, 7.4vw, 84px);
  line-height: .98;
  letter-spacing: -.035em;
  color: var(--white);
  max-width: 15ch;
}

.page-about .ab-hero__lede {
  margin: clamp(20px, 3vw, 28px) 0 0;
  max-width: 62ch;
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.75;
  color: var(--silver);
}

.page-about .ab-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(32px, 5vw, 56px) 0 0;
  background: rgba(185, 195, 192, .2);
}

.page-about .ab-stat {
  background: rgba(7, 25, 19, .84);
  padding: 18px 16px 20px;
}

.page-about .ab-stat__label {
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--silver);
  margin: 0 0 8px;
}

.page-about .ab-stat__value {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 0;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(25px, 3.6vw, 38px);
  line-height: 1.05;
  color: var(--lime);
}

.page-about .ab-stat__unit {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  color: var(--silver);
}

/* ---------- 通用版式 ---------- */
.page-about .ab-index {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .22em;
  color: var(--orange);
}

.page-about .ab-section-head {
  max-width: 62ch;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-about .ab-section-head--dark .h-section {
  color: var(--white);
}

.page-about .ab-section-head .h-section {
  margin: 0 0 14px;
}

.page-about .ab-lede {
  margin: 0;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.75;
  color: var(--steel);
}

.page-about .ab-section-head--dark .ab-lede {
  color: var(--silver);
}

.page-about .ab-spread {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .ab-spread__text .h-section {
  margin: 0 0 18px;
}

.page-about .ab-spread__media {
  margin: 0;
}

.page-about .ab-spread__media img,
.page-about .ab-tl-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .media-frame img {
  max-width: 100%;
}

.page-about .prose p {
  margin: 0 0 1.05em;
  font-size: 17px;
  line-height: 1.8;
}

.page-about .prose p:last-child {
  margin-bottom: 0;
}

/* ---------- 02 数据来源 ---------- */
.page-about .ab-sources-sec {
  background: var(--charcoal);
  color: var(--cream);
}

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

.page-about .ab-source {
  position: relative;
  padding: 26px 22px 28px;
  background: linear-gradient(162deg, rgba(30, 74, 60, .9), rgba(16, 19, 18, .92));
  border-top: 2px solid var(--lime);
}

.page-about .ab-source__no {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--orange);
}

.page-about .ab-source .h-block {
  margin: 0 0 12px;
  color: var(--white);
}

.page-about .ab-source p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--silver);
}

.page-about .ab-sources__foot {
  margin-top: clamp(26px, 4vw, 40px);
  padding-left: 18px;
  border-left: 2px solid var(--silver);
  max-width: 78ch;
}

.page-about .ab-sources__foot p {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--silver);
}

.page-about .ab-sources__foot p:last-child {
  margin-bottom: 0;
}

/* ---------- 03 团队 ---------- */
.page-about .ab-note {
  border-left: 2px solid var(--line-light);
  padding-left: 16px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--steel);
}

.page-about .ab-note--panel {
  border-left: 0;
  border-top: 3px solid var(--orange);
  padding: 24px 22px 22px;
  background: rgba(30, 74, 60, .07);
}

.page-about .ab-note__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: .02em;
  color: var(--ink);
}

.page-about .ab-note__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

.page-about .ab-note__list li {
  position: relative;
  padding: 0 0 11px;
  margin-bottom: 11px;
  border-bottom: 1px solid var(--line-light);
}

.page-about .ab-note__list li:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .ab-note__list .num {
  font-family: var(--font-num);
  font-weight: 700;
  font-size: 19px;
  color: var(--ink);
  margin-right: 3px;
}

/* ---------- 04 时间轴 ---------- */
.page-about .ab-tl-sec {
  background:
    linear-gradient(180deg, var(--moss) 0%, var(--ink) 100%);
  color: var(--cream);
}

.page-about .ab-tl-media {
  margin: 0 0 clamp(30px, 5vw, 52px);
}

.page-about .ab-tl-media .media-caption {
  margin-top: 12px;
}

.page-about .ab-timeline {
  display: grid;
  gap: 0;
}

.page-about .ab-tl {
  position: relative;
  padding-left: 38px;
  padding-bottom: 10px;
}

.page-about .ab-tl::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 14px;
  bottom: -4px;
  width: 1px;
  background: rgba(201, 255, 61, .3);
}

.page-about .ab-tl:last-child::before {
  bottom: auto;
  height: 22px;
}

.page-about .ab-tl::after {
  content: "";
  position: absolute;
  left: 2px;
  top: 12px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: 2px solid var(--lime);
  background: var(--ink);
}

.page-about .ab-tl summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 4px 0 14px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .ab-tl summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 4px;
}

.page-about .ab-tl__year {
  font-family: var(--font-num);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--lime);
}

.page-about .ab-tl__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.3vw, 24px);
  color: var(--white);
}

.page-about .ab-tl__mark {
  margin-left: auto;
  font-family: var(--font-num);
  font-size: 20px;
  line-height: 1;
  color: var(--orange);
  transition: transform .25s var(--ease);
}

.page-about .ab-tl[open] .ab-tl__mark {
  transform: rotate(45deg);
}

.page-about .ab-tl__body {
  max-width: 64ch;
  padding: 0 0 24px;
}

.page-about .ab-tl__body p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--silver);
}

/* ---------- 06 收束 ---------- */
.page-about .ab-outro {
  background:
    radial-gradient(80% 90% at 90% 100%, rgba(255, 106, 43, .16), rgba(255, 106, 43, 0) 60%),
    linear-gradient(180deg, var(--ink) 0%, var(--charcoal) 100%);
  color: var(--cream);
}

.page-about .ab-outro .ab-index {
  color: var(--lime);
}

.page-about .ab-quote {
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 22ch;
  font-weight: 900;
  font-size: clamp(26px, 4.4vw, 52px);
  line-height: 1.14;
  letter-spacing: -.025em;
  color: var(--white);
}

.page-about .ab-outro__text {
  margin: 0 0 clamp(26px, 4vw, 40px);
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--silver);
}

.page-about .ab-outro__links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 720px) {
  .page-about .ab-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-stat {
    padding: 22px 20px 24px;
  }

  .page-about .ab-sources {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 960px) {
  .page-about .ab-spread {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: center;
    column-gap: clamp(32px, 5vw, 72px);
  }

  .page-about .ab-spread--flip {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  }

  .page-about .ab-note {
    padding-left: 22px;
  }

  .page-about .ab-note--panel {
    padding: 28px 26px 26px;
  }

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

  .page-about .ab-tl::before {
    left: 10px;
  }

  .page-about .ab-tl::after {
    left: 4px;
    width: 14px;
    height: 14px;
  }
}

@media (min-width: 1200px) {
  .page-about .ab-hero__head {
    max-width: 900px;
  }

  .page-about .ab-source {
    padding: 32px 28px 34px;
  }
}
<<<END>>>