.page-about {
  --ab-index-w: 218px;
  --ab-gap: clamp(22px, 3.6vw, 46px);
  --ab-sec-pad: clamp(26px, 4vw, 46px);
  background: var(--tq-paper);
  color: var(--tq-ink);
  font-family: var(--tq-font-body);
}

/* ---------- 面包屑 ---------- */
.page-about .ab-crumb-wrap {
  background: var(--tq-paper);
  padding: clamp(10px, 2vw, 16px) 0;
  border-bottom: 1px solid rgba(31, 83, 66, 0.14);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 82% 18%, rgba(242, 194, 48, 0.16), transparent 48%),
    linear-gradient(168deg, var(--tq-moss) 0%, var(--tq-ink) 66%);
  color: var(--tq-paper);
  padding: clamp(30px, 5vw, 62px) 0 clamp(34px, 5.5vw, 70px);
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(199, 207, 203, 0.16) 1px, transparent 1px);
  background-size: 18px 18px;
  opacity: 0.45;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 78%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 78%);
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
}

.page-about .ab-hero__title {
  margin: 12px 0 0;
  font-family: var(--tq-font-display);
  font-weight: 800;
  font-size: clamp(30px, 5vw, 54px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--tq-paper);
}

.page-about .ab-hero__lede {
  margin-top: 16px;
  max-width: 52ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.78;
  color: var(--tq-silver);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* 版本示意牌 */
.page-about .ab-sign {
  display: grid;
  justify-items: start;
  gap: 10px;
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--tq-edge);
  border-radius: var(--tq-radius-m);
  background: linear-gradient(150deg, rgba(31, 83, 66, 0.55), rgba(11, 31, 26, 0.92));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .ab-sign__tag {
  font-family: var(--tq-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--tq-yellow);
  border: 1px solid rgba(242, 194, 48, 0.5);
  border-radius: 999px;
  padding: 3px 10px;
}

.page-about .ab-sign__big {
  font-family: var(--tq-font-mono);
  font-size: clamp(56px, 9vw, 92px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: var(--tq-yellow);
}

.page-about .ab-sign__note {
  font-size: 14px;
  line-height: 1.65;
  color: var(--tq-silver);
  max-width: 26ch;
}

.page-about .ab-sign__dots {
  display: flex;
  gap: 7px;
  margin-top: 2px;
}

.page-about .ab-sign__dots i {
  display: block;
  width: 26px;
  height: 4px;
  border-radius: 2px;
  background: rgba(199, 207, 203, 0.3);
}

.page-about .ab-sign__dots i:last-child {
  background: var(--tq-red);
}

.page-about .ab-sign__meta {
  font-family: var(--tq-font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--tq-mute);
}

/* ---------- 主体骨架 ---------- */
.page-about .ab-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 38px);
  padding-top: clamp(24px, 4vw, 44px);
  padding-bottom: clamp(34px, 5vw, 68px);
}

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

/* ---------- 目录 ---------- */
.page-about .ab-index {
  border-bottom: 1px solid rgba(31, 83, 66, 0.16);
  padding-bottom: 10px;
}

.page-about .ab-index__title {
  margin: 0 0 8px;
  font-family: var(--tq-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--tq-mute);
}

.page-about .ab-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 2px;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .ab-index__link {
  display: flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid rgba(31, 83, 66, 0.2);
  color: #3d5a4f;
  font-size: 13px;
  text-decoration: none;
  transition: background 0.18s var(--tq-ease), color 0.18s var(--tq-ease), border-color 0.18s var(--tq-ease);
}

.page-about .ab-index__num {
  font-family: var(--tq-font-mono);
  font-size: 11px;
  color: var(--tq-mute);
  transition: color 0.18s var(--tq-ease);
}

.page-about .ab-index__link:hover,
.page-about .ab-index__link:focus-visible {
  background: var(--tq-ink);
  border-color: var(--tq-ink);
  color: var(--tq-paper);
}

.page-about .ab-index__link:hover .ab-index__num,
.page-about .ab-index__link:focus-visible .ab-index__num {
  color: var(--tq-yellow);
}

/* ---------- 章节通用 ---------- */
.page-about .ab-sec {
  padding-block: var(--ab-sec-pad);
  scroll-margin-top: calc(var(--tq-navbar-h) + 20px);
}

.page-about .ab-sec:first-child {
  padding-top: 0;
}

.page-about .ab-sec + .ab-sec {
  border-top: 1px solid rgba(31, 83, 66, 0.14);
}

.page-about .ab-sec__head {
  max-width: 64ch;
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

.page-about .ab-kicker {
  margin: 0 0 8px;
  font-family: var(--tq-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: #5c7a6d;
}

.page-about .ab-kicker--hero {
  color: var(--tq-yellow);
  margin-bottom: 0;
}

.page-about .ab-sec__head .tq-h2 {
  font-family: var(--tq-font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.22;
  margin: 0;
  color: var(--tq-ink);
}

.page-about .ab-sec__lede {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: #405a50;
}

/* ---------- 起点与重心 ---------- */
.page-about .ab-story {
  gap: clamp(20px, 3vw, 34px);
  align-items: start;
}

.page-about .ab-prose p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: #2b3b34;
}

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

.page-about .ab-story__fig {
  margin: 0;
  border-radius: var(--tq-radius-m);
  overflow: hidden;
}

.page-about .ab-story__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 编辑台 ---------- */
.page-about .ab-roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: rgba(31, 83, 66, 0.32);
  border: 1px solid rgba(31, 83, 66, 0.32);
  border-radius: var(--tq-radius-m);
  overflow: hidden;
}

.page-about .ab-role {
  background: var(--tq-moss);
  padding: clamp(16px, 2.4vw, 24px);
  display: grid;
  gap: 8px;
  align-content: start;
}

.page-about .ab-role__tag {
  margin: 0;
  font-family: var(--tq-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--tq-yellow);
}

.page-about .ab-role__name {
  margin: 0;
  font-family: var(--tq-font-display);
  font-size: 18px;
  font-weight: 800;
  color: var(--tq-paper);
  letter-spacing: -0.01em;
}

.page-about .ab-role__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--tq-silver);
}

.page-about .ab-team {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 26px;
  margin: 16px 0 0;
  padding: 13px 18px;
  border-radius: var(--tq-radius-s);
  background: rgba(20, 54, 43, 0.07);
  border-left: 3px solid var(--tq-yellow);
  font-size: 14px;
  color: #2b3b34;
}

.page-about .ab-team b {
  font-family: var(--tq-font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--tq-ink);
  margin-right: 5px;
}

/* 流程 */
.page-about .ab-flowsteps {
  list-style: none;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
}

.page-about .ab-flowstep {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-top: 1px solid rgba(31, 83, 66, 0.18);
  align-items: start;
}

.page-about .ab-flowstep:last-child {
  border-bottom: 1px solid rgba(31, 83, 66, 0.18);
}

.page-about .ab-flowstep__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--tq-yellow);
  color: var(--tq-ink);
  font-family: var(--tq-font-mono);
  font-size: 12px;
  font-weight: 700;
  margin-top: 2px;
}

.page-about .ab-flowstep__title {
  margin: 0 0 4px;
  font-family: var(--tq-font-display);
  font-size: 16px;
  font-weight: 800;
  color: var(--tq-ink);
}

.page-about .ab-flowstep__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: #405a50;
}

/* ---------- 版本时间带 ---------- */
.page-about .ab-track {
  list-style: none;
  margin: 0;
  padding: 18px 0 16px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(212px, 1fr);
  gap: 0;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: thin;
}

.page-about .ab-track__item {
  position: relative;
  border-top: 2px solid var(--tq-edge);
  padding: 26px 20px 0 0;
}

.page-about .ab-track__dot {
  position: absolute;
  top: -7px;
  left: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--tq-yellow);
  box-shadow: 0 0 0 3px var(--tq-paper);
}

.page-about .ab-track__tag {
  display: block;
  margin-bottom: 6px;
  font-family: var(--tq-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: #8a6f18;
}

.page-about .ab-track__title {
  margin: 0 0 6px;
  font-family: var(--tq-font-display);
  font-size: 16px;
  font-weight: 800;
  line-height: 1.35;
  color: var(--tq-ink);
}

.page-about .ab-track__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: #405a50;
}

.page-about .ab-track__more {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--tq-mute);
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.3s var(--tq-ease), opacity 0.25s var(--tq-ease), margin-top 0.3s var(--tq-ease);
}

.page-about .ab-track__item:hover .ab-track__more,
.page-about .ab-track__item:focus-within .ab-track__more {
  max-height: 160px;
  opacity: 1;
  margin-top: 8px;
}

/* ---------- 经典收藏版 ---------- */
.page-about .ab-sec.ab-sec--cream {
  background: var(--tq-cream);
  border-radius: var(--tq-radius-l);
  border-top-color: transparent;
  padding: clamp(20px, 3.4vw, 38px);
  margin-block: clamp(6px, 1.5vw, 14px);
}

.page-about .ab-classic {
  align-items: center;
  gap: clamp(20px, 3vw, 34px);
}

.page-about .ab-classic__prose {
  margin-top: 10px;
}

.page-about .ab-classic__list {
  list-style: none;
  margin: 14px 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-classic__list li {
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  line-height: 1.72;
  color: #2b3b34;
}

.page-about .ab-classic__list li::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--tq-yellow);
  transform: rotate(45deg);
}

.page-about .ab-classic__fig {
  margin: 0;
  border-radius: var(--tq-radius-m);
  overflow: hidden;
}

.page-about .ab-classic__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .ab-swap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-about .ab-swap__tab {
  padding: 10px 18px;
  border-radius: 8px 8px 0 0;
  font-family: var(--tq-font-display);
  font-size: 14px;
  font-weight: 800;
  border: 1px solid rgba(11, 31, 26, 0.22);
  border-bottom: 0;
}

.page-about .ab-swap__tab--now {
  background: var(--tq-ink);
  color: var(--tq-yellow);
  border-color: var(--tq-ink);
}

.page-about .ab-swap__tab--old {
  background: #fff;
  color: var(--tq-ink);
}

.page-about .ab-swap__arrow {
  display: inline-flex;
  align-items: center;
  color: #6b6f6a;
}

/* ---------- 覆盖与节奏 ---------- */
.page-about .ab-sec.ab-sec--dark {
  background: var(--tq-ink);
  color: var(--tq-silver);
  border-radius: var(--tq-radius-l);
  border-top-color: transparent;
  padding: clamp(22px, 3.6vw, 40px);
}

.page-about .ab-sec--dark .ab-kicker {
  color: var(--tq-yellow);
}

.page-about .ab-sec--dark .tq-h2 {
  color: var(--tq-paper);
}

.page-about .ab-sec--dark .ab-sec__lede {
  color: var(--tq-silver);
}

.page-about .ab-banner {
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  border-radius: var(--tq-radius-m);
  overflow: hidden;
}

.page-about .ab-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 1px;
  margin: 0;
  background: rgba(199, 207, 203, 0.22);
  border-radius: var(--tq-radius-s);
  overflow: hidden;
}

.page-about .ab-stat {
  background: var(--tq-moss);
  padding: 16px 14px;
  display: grid;
  gap: 5px;
}

.page-about .ab-stat__label {
  margin: 0;
  order: 2;
  font-size: 13px;
  color: var(--tq-silver);
}

.page-about .ab-stat__num {
  margin: 0;
  order: 1;
  font-family: var(--tq-font-mono);
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--tq-yellow);
}

.page-about .ab-speeds {
  list-style: none;
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .ab-speed__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 7px;
}

.page-about .ab-speed__name {
  font-size: 14px;
  font-weight: 700;
  color: var(--tq-paper);
}

.page-about .ab-speed__val {
  font-family: var(--tq-font-mono);
  font-size: 13px;
  color: var(--tq-yellow);
  text-align: right;
}

.page-about .ab-speed__rail {
  height: 8px;
  border-radius: 4px;
  background: rgba(199, 207, 203, 0.16);
  overflow: hidden;
}

.page-about .ab-speed__bar {
  display: block;
  height: 100%;
  width: 100%;
  border-radius: 4px;
  transform-origin: left center;
  background: var(--tq-yellow);
}

.page-about .ab-speed--fast .ab-speed__bar {
  transform: scaleX(1);
  background: var(--tq-yellow);
}

.page-about .ab-speed--mid .ab-speed__bar {
  transform: scaleX(0.72);
  background: var(--tq-glow);
}

.page-about .ab-speed--slow .ab-speed__bar {
  transform: scaleX(0.44);
  background: var(--tq-mute);
}

.page-about .ab-speed__note {
  margin: 7px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--tq-mute);
}

/* ---------- 合作与联系 ---------- */
.page-about .ab-partner__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 6px;
  background: rgba(31, 83, 66, 0.18);
  border: 1px solid rgba(31, 83, 66, 0.18);
  border-radius: var(--tq-radius-m);
  overflow: hidden;
}

.page-about .ab-partner__item {
  background: #fff;
  padding: clamp(16px, 2.2vw, 22px);
  display: grid;
  gap: 6px;
  align-content: start;
}

.page-about .ab-partner__title {
  margin: 0;
  font-family: var(--tq-font-display);
  font-size: 15.5px;
  font-weight: 800;
  color: var(--tq-ink);
}

.page-about .ab-partner__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: #405a50;
}

.page-about .ab-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: clamp(18px, 2.6vw, 26px);
  padding: clamp(16px, 2.4vw, 24px);
  border-radius: var(--tq-radius-m);
  background: var(--tq-moss);
  color: var(--tq-silver);
}

.page-about .ab-cta__text {
  margin: 0;
  max-width: 46ch;
  font-size: 14.5px;
  line-height: 1.72;
}

.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .ab-more {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: #4a655a;
}

.page-about .ab-more a {
  color: var(--tq-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--tq-yellow);
  text-decoration-thickness: 2px;
}

.page-about .ab-more a:hover,
.page-about .ab-more a:focus-visible {
  color: #8a6f18;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .ab-partner__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .ab-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

@media (min-width: 1020px) {
  .page-about .ab-shell {
    grid-template-columns: var(--ab-index-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .ab-index {
    position: sticky;
    top: calc(var(--tq-navbar-h) + 24px);
    border-bottom: 0;
    padding: 0 0 0 2px;
    border-left: 2px solid rgba(31, 83, 66, 0.16);
  }

  .page-about .ab-index__list {
    display: grid;
    gap: 2px;
    overflow: visible;
  }

  .page-about .ab-index__link {
    border-radius: 0 var(--tq-radius-s) var(--tq-radius-s) 0;
    border-color: transparent;
    border-left: 2px solid transparent;
    margin-left: -4px;
    padding: 9px 10px 9px 14px;
    white-space: normal;
  }

  .page-about .ab-index__link:hover,
  .page-about .ab-index__link:focus-visible {
    background: #fff;
    color: var(--tq-ink);
    border-color: transparent;
    border-left-color: var(--tq-yellow);
  }
}

@media (hover: none) {
  .page-about .ab-track__more {
    max-height: 160px;
    opacity: 1;
    margin-top: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-index__link,
  .page-about .ab-index__num,
  .page-about .ab-track__more {
    transition: none;
  }
}
<<<END>>>