.page-about {
  --about-ink-soft: rgba(244, 241, 232, 0.78);
  --about-ink-faint: rgba(244, 241, 232, 0.72);
  --about-paper-ink: #33443c;
  background: var(--arena-ink);
  color: var(--chalk-paper);
  font-family: var(--font-body);
  overflow-x: hidden;
  padding-bottom: clamp(2.5rem, 6vw, 5rem);
}

.page-about .breadcrumb {
  margin-top: clamp(0.85rem, 2.5vw, 1.75rem);
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  position: relative;
  margin-top: clamp(1.25rem, 3.5vw, 2.5rem);
  padding: clamp(1.6rem, 4vw, 3rem) 0 clamp(1.9rem, 4vw, 3.25rem);
  border-top: 1px solid var(--line-green);
  border-bottom: 1px solid var(--line-green);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: repeating-linear-gradient(
    to bottom,
    var(--lime-signal) 0 14px,
    var(--line-green) 14px 28px
  );
  opacity: 0.55;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2rem, 7vw, 4.75rem);
  line-height: 1.05;
  letter-spacing: 0.005em;
  margin: 0.85rem 0 0;
  max-width: 22ch;
}

.page-about .about-hero__lead {
  margin: clamp(1rem, 2.5vw, 1.75rem) 0 0;
  max-width: 62ch;
  font-size: clamp(0.94rem, 1.6vw, 1.05rem);
  line-height: 1.92;
  color: var(--about-ink-soft);
}

.page-about .about-figures {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(1.6rem, 3.5vw, 2.5rem) 0 0;
  padding: 1px;
  background: var(--line-green);
  border: 1px solid var(--line-green);
}

.page-about .about-figures__item {
  background: var(--arena-ink);
  padding: 1rem 1.05rem 1.15rem;
  min-width: 0;
}

.page-about .fig__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.55rem, 4vw, 2.35rem);
  line-height: 1;
  color: var(--lime-signal);
}

.page-about .fig__label {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--mist-gray);
}

/* ---------- 主体网格 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  padding-top: clamp(2rem, 4.5vw, 3.5rem);
}

.page-about .about-rail {
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--line-green);
  scrollbar-width: thin;
}

.page-about .rail__title {
  display: none;
  margin: 0;
}

.page-about .rail__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  white-space: nowrap;
  padding: 0.42rem 0.8rem;
  border: 1px solid var(--line-green);
  border-radius: 999px;
  font-size: 0.82rem;
  color: var(--mist-gray);
  text-decoration: none;
  transition: color 0.25s var(--ease-quick), border-color 0.25s var(--ease-quick);
}

.page-about .rail__link:hover,
.page-about .rail__link:focus-visible {
  color: var(--lime-signal);
  border-color: var(--lime-signal);
  outline: none;
}

.page-about .rail__num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--score-gray);
  margin-right: 0.45rem;
}

/* ---------- 章节 ---------- */
.page-about .sec {
  padding-top: clamp(1.75rem, 4vw, 3rem);
  border-top: 1px solid var(--line-green);
}

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

.page-about .sec + .sec {
  margin-top: clamp(1.9rem, 4.5vw, 3.5rem);
}

.page-about .sec__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime-signal);
}

.page-about .sec__title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.55rem, 4.4vw, 2.9rem);
  line-height: 1.14;
  margin: 0.55rem 0 1.1rem;
  max-width: 24ch;
}

.page-about .sec p {
  margin: 0 0 1rem;
  max-width: 64ch;
  font-size: clamp(0.93rem, 1.5vw, 1rem);
  line-height: 1.95;
  color: var(--about-ink-soft);
}

.page-about .sec__tail {
  margin-top: 1.25rem !important;
  font-size: 0.88rem !important;
  color: var(--mist-gray) !important;
}

.page-about .sec a:not(.btn) {
  color: var(--lime-signal);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 61, 0.35);
  transition: border-color 0.25s var(--ease-quick);
}

.page-about .sec a:not(.btn):hover,
.page-about .sec a:not(.btn):focus-visible {
  border-bottom-color: var(--lime-signal);
  outline: none;
}

.page-about .sec:target .sec__title {
  color: var(--lime-signal);
}

/* ---------- 图片容器沿用共享壳 ---------- */
.page-about .media-frame {
  margin: clamp(1.25rem, 3vw, 2rem) 0;
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 版本账本 ---------- */
.page-about .ledger {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(1.25rem, 3vw, 2rem) 0 0;
  padding: 1px;
  background: var(--line-green);
  border: 1px solid var(--line-green);
}

.page-about .ledger__item {
  background: var(--turf-shadow);
  padding: 1.2rem 1.05rem 1.35rem;
  transition: background 0.28s var(--ease-quick);
}

.page-about .ledger__item:hover {
  background: rgba(200, 255, 61, 0.08);
}

.page-about .ledger__ver {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 1.35rem;
  line-height: 1;
  color: var(--lime-signal);
}

.page-about .ledger__name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.08rem;
  margin: 0.65rem 0 0.4rem;
  color: var(--chalk-paper);
}

.page-about .sec .ledger__desc {
  margin: 0;
  max-width: none;
  font-size: 0.84rem;
  line-height: 1.72;
  color: var(--about-ink-faint);
}

/* ---------- 标签四维 ---------- */
.page-about .dims {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(1.25rem, 3vw, 1.75rem) 0 0;
  padding: 1px;
  background: var(--line-green);
  border: 1px solid var(--line-green);
}

.page-about .dims__cell {
  background: var(--arena-ink);
  padding: 1.1rem 1.05rem 1.25rem;
  min-width: 0;
}

.page-about .dims__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--score-gray);
}

.page-about .dims__name {
  display: block;
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin: 0.4rem 0 0.35rem;
  color: var(--chalk-paper);
}

.page-about .sec .dims__desc {
  margin: 0;
  max-width: none;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--about-ink-faint);
}

/* ---------- 流水线 ---------- */
.page-about .flow {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  border-top: 1px solid var(--line-green);
}

.page-about .flow__row {
  display: grid;
  grid-template-columns: 2.3rem minmax(0, 1fr);
  column-gap: 0.85rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line-green);
}

.page-about .flow__no {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--lime-signal);
  padding-top: 0.25rem;
}

.page-about .flow__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--chalk-paper);
}

.page-about .sec .flow__desc {
  margin: 0.3rem 0 0;
  max-width: none;
  font-size: 0.86rem;
  line-height: 1.72;
  color: var(--about-ink-faint);
}

/* ---------- 团队 ---------- */
.page-about .crew-head {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  margin: 1.5rem 0 1.4rem;
}

.page-about .crew-head .crew-head__note {
  margin: 0;
  max-width: 48ch;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--mist-gray);
}

.page-about .crew-figure {
  align-self: flex-start;
  display: inline-flex;
  align-items: baseline;
  gap: 0.55rem;
  margin: 0;
  padding: 1.1rem 1.5rem;
  background: var(--lime-signal);
  color: var(--arena-ink);
  border-radius: var(--radius-organic);
}

.page-about .crew-figure__num {
  font-family: var(--font-mono);
  font-size: clamp(2.2rem, 6vw, 3.2rem);
  line-height: 1;
  font-weight: 700;
}

.page-about .crew-figure__unit {
  font-size: 0.8rem;
  letter-spacing: 0.1em;
}

.page-about .crew {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  padding: 1px;
  background: var(--line-green);
  border: 1px solid var(--line-green);
}

.page-about .crew__item {
  background: var(--turf-shadow);
  padding: 1.15rem 1.05rem 1.3rem;
  min-width: 0;
  transition: background 0.28s var(--ease-quick);
}

.page-about .crew__item:hover {
  background: rgba(200, 255, 61, 0.08);
}

.page-about .crew__name {
  display: block;
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--lime-soft);
}

.page-about .sec .crew__role {
  margin: 0.4rem 0 0;
  max-width: none;
  font-size: 0.85rem;
  line-height: 1.74;
  color: var(--about-ink-faint);
}

/* ---------- 浅色面板 ---------- */
.page-about .panel-paper {
  background: var(--chalk-paper);
  color: var(--arena-ink);
  border-radius: var(--radius-organic);
  padding: clamp(1.35rem, 3.5vw, 2.5rem);
}

.page-about .panel-paper .sec__kicker {
  color: var(--score-gray);
}

.page-about .panel-paper .sec__title {
  color: var(--arena-ink);
  max-width: 26ch;
}

.page-about .panel-paper p {
  color: var(--about-paper-ink);
}

.page-about .coop {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.page-about .coop__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.8rem;
  align-items: baseline;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(7, 26, 20, 0.14);
}

.page-about .coop__item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .coop__tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  padding: 0.16rem 0.48rem;
  border-radius: 0.35rem;
  background: var(--lime-soft);
  color: var(--arena-ink);
}

.page-about .panel-paper .coop__desc {
  margin: 0;
  max-width: none;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--about-paper-ink);
}

.page-about .panel-paper__cta {
  margin: 1.5rem 0 0;
}

/* ---------- 备案与联系 ---------- */
.page-about .trust-grid {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 1.5rem 0 0;
  padding: 1px;
  background: var(--line-green);
  border: 1px solid var(--line-green);
}

.page-about .trust-grid__cell {
  background: var(--arena-ink);
  padding: 0.95rem 1.05rem 1.05rem;
  min-width: 0;
}

.page-about .trust-grid__k {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--score-gray);
  margin-bottom: 0.35rem;
}

.page-about .trust-grid__v {
  display: block;
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--chalk-paper);
  word-break: break-word;
}

.page-about .trust-grid__v a {
  color: var(--lime-signal);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .ledger {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

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

  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .crew-head {
    flex-direction: row;
    align-items: center;
    gap: 2rem;
  }
}

@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: minmax(0, 190px) minmax(0, 1fr);
    column-gap: clamp(2rem, 4.5vw, 4.5rem);
    align-items: start;
  }

  .page-about .about-rail {
    display: block;
    overflow: visible;
    padding: 0 0 0 1rem;
    border-bottom: 0;
    border-left: 1px solid var(--line-green);
    position: sticky;
    top: calc(var(--head-h) + 1.5rem);
  }

  .page-about .rail__title {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--score-gray);
    margin: 0 0 0.8rem;
  }

  .page-about .rail__link {
    display: flex;
    align-items: baseline;
    gap: 0.55rem;
    border: 0;
    border-radius: 0;
    padding: 0.4rem 0;
    font-size: 0.88rem;
  }

  .page-about .rail__num {
    margin-right: 0;
  }

  .page-about .ledger {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .flow__row {
    grid-template-columns: 3.2rem minmax(0, 1fr);
    column-gap: 1.1rem;
    padding: 1.15rem 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .rail__link,
  .page-about .ledger__item,
  .page-about .crew__item,
  .page-about .sec a:not(.btn) {
    transition: none;
  }
}
<<<END>>>