.page-about {
  --about-toc-w: 208px;
  --about-gap: clamp(24px, 4vw, 44px);
  color: var(--text);
  padding-bottom: clamp(56px, 8vw, 104px);
  background:
    radial-gradient(900px 420px at 88% -8%, rgba(184, 255, 63, 0.07), transparent 62%),
    linear-gradient(180deg, var(--ink) 0%, rgba(8, 12, 11, 0.94) 60%, var(--ink) 100%);
}

.page-about .about-shell {
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  padding-top: clamp(20px, 4vw, 44px);
  align-items: start;
}

.page-about .about-hero__copy .eyebrow {
  display: inline-block;
  margin: 0 0 18px;
  padding: 6px 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--line);
  background: rgba(184, 255, 63, 0.06);
}

.page-about .about-hero__copy h1 {
  margin: 0 0 20px;
  font-size: clamp(34px, 6vw, 68px);
  line-height: 1.06;
  letter-spacing: -0.04em;
  font-weight: 800;
  color: var(--text);
}

.page-about .about-hero__copy h1::after {
  content: "";
  display: block;
  width: 88px;
  height: 3px;
  margin-top: 22px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.page-about .about-hero__copy .lede {
  margin: 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 30px 0 0;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-hero__stat {
  padding: 14px 14px 16px;
  background: var(--panel);
}

.page-about .about-hero__stat dt {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cool);
}

.page-about .about-hero__stat dd {
  margin: 8px 0 0;
  font-size: 13px;
  color: var(--muted);
}

.page-about .about-hero__num {
  font-family: var(--mono);
  font-size: clamp(22px, 3.2vw, 30px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--accent);
  margin-right: 2px;
}

.page-about .about-hero__visual {
  margin: 0;
  position: relative;
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 10px;
}

.page-about .about-hero__visual::before {
  content: "";
  position: absolute;
  inset: 10px;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, rgba(43, 87, 72, 0.5) 0 1px, transparent 1px 44px),
    repeating-linear-gradient(90deg, rgba(43, 87, 72, 0.35) 0 1px, transparent 1px 44px);
  mix-blend-mode: screen;
  opacity: 0.5;
}

.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 14 / 9;
  filter: saturate(0.85) contrast(1.06);
}

.page-about .about-hero__caption {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--cool);
  padding-left: 10px;
  border-left: 2px solid var(--signal);
}

/* ---------- 主体：目录 + 画板 ---------- */
.page-about .about-body {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(40px, 6vw, 76px);
}

.page-about .about-toc {
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.page-about .about-toc__title {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.page-about .about-toc__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}

.page-about .about-toc__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  white-space: nowrap;
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line-soft);
  background: var(--panel);
  transition: color 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

.page-about .about-toc__num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--cool);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--accent);
  border-color: var(--accent-dim);
  background: var(--panel-2);
  outline: none;
}

.page-about .about-toc__link:focus-visible {
  box-shadow: 0 0 0 2px var(--focus);
}

.page-about .about-toc__foot {
  margin: 14px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--cool);
}

.page-about .about-canvas {
  display: grid;
  gap: clamp(20px, 3vw, 30px);
  min-width: 0;
}

/* ---------- 画板 ---------- */
.page-about .about-board {
  position: relative;
  padding: clamp(20px, 3.2vw, 38px);
  border: 1px solid var(--line-soft);
  background: linear-gradient(180deg, var(--panel) 0%, rgba(13, 34, 27, 0.7) 100%);
  scroll-margin-top: calc(var(--header-h) + 20px);
  transition: border-color 200ms ease, transform 200ms ease;
}

.page-about .about-board::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 0;
  background: var(--accent);
  transition: height 220ms ease;
}

.page-about .about-board:hover::after,
.page-about .about-board:focus-within::after {
  height: 56px;
}

.page-about .about-board:hover,
.page-about .about-board:focus-within {
  border-color: var(--line);
}

.page-about .about-board__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-board__num {
  flex: 0 0 auto;
  padding-top: 6px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.page-about .about-board__title {
  margin: 0;
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.36;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-board__text {
  margin: 0 0 16px;
  max-width: 68ch;
  font-size: clamp(14px, 1.5vw, 16px);
  line-height: 1.85;
  color: var(--muted);
}

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

.page-about .about-board__text--tight {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px dashed var(--line-soft);
}

.page-about .about-inline-link {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent-dim);
  margin-left: 6px;
  transition: color 160ms ease, border-color 160ms ease;
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--text);
  border-color: var(--text);
  outline: none;
}

.page-about .about-inline-link:focus-visible {
  box-shadow: 0 0 0 2px var(--focus);
}

/* ---------- 旁注 ---------- */
.page-about .about-note {
  margin: 20px 0;
  padding: 14px 16px 14px 18px;
  border-left: 2px solid var(--cool);
  background: rgba(143, 174, 191, 0.07);
}

.page-about .about-note__label {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cool);
}

.page-about .about-note__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 事实条 ---------- */
.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 14px;
  background: var(--panel-2);
}

.page-about .about-facts__k {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--cool);
}

.page-about .about-facts__v {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

/* ---------- 流程 ---------- */
.page-about .about-process {
  display: grid;
  gap: 22px;
}

.page-about .about-flow {
  display: grid;
  gap: 1px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-flow__step {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: var(--panel-2);
  font-size: 13.5px;
  color: var(--text);
}

.page-about .about-flow__n {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink);
  background: var(--accent);
}

.page-about .about-process__figure {
  margin: 0;
}

.page-about .about-process__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line);
  filter: saturate(0.8) contrast(1.05);
}

.page-about .about-process__caption {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.7;
  color: var(--cool);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 22px 0 0;
  padding: 0 0 0 22px;
  list-style: none;
  border-left: 1px solid var(--line);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 14px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 14px;
  width: 9px;
  height: 9px;
  background: var(--panel);
  border: 1px solid var(--line);
  transition: background-color 180ms ease, border-color 180ms ease;
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus-within::before {
  background: var(--accent);
  border-color: var(--accent);
}

.page-about .about-timeline__item details {
  border: 1px solid var(--line-soft);
  background: rgba(18, 53, 42, 0.5);
  transition: border-color 180ms ease, background-color 180ms ease;
}

.page-about .about-timeline__item details:hover,
.page-about .about-timeline__item details:focus-within {
  border-color: var(--line);
  background: var(--panel-2);
}

.page-about .about-timeline__item summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  padding: 13px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 14.5px;
  color: var(--text);
}

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

.page-about .about-timeline__item summary:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--focus);
}

.page-about .about-timeline__year {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 3px 7px;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
}

.page-about .about-timeline__name {
  font-weight: 600;
}

.page-about .about-timeline__item details[open] .about-timeline__year {
  background: rgba(184, 255, 63, 0.12);
}

.page-about .about-timeline__body {
  margin: 0;
  padding: 0 16px 16px;
  font-size: 13.5px;
  line-height: 1.82;
  color: var(--muted);
  border-top: 1px dashed var(--line-soft);
  padding-top: 12px;
}

/* ---------- 合作 ---------- */
.page-about .about-coop {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.page-about .about-coop__card {
  padding: 18px 18px 20px;
  border: 1px solid var(--line-soft);
  border-top: 2px solid var(--signal);
  background: var(--panel-2);
  transition: transform 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

.page-about .about-coop__card:hover,
.page-about .about-coop__card:focus-within {
  transform: translateY(-3px);
  border-color: var(--line);
  background: rgba(18, 53, 42, 0.86);
}

.page-about .about-coop__title {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .about-coop__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.82;
  color: var(--muted);
}

/* ---------- 河南运营 ---------- */
.page-about .about-henan {
  display: grid;
  gap: 22px;
}

.page-about .about-henan__figure {
  margin: 0;
  order: -1;
}

.page-about .about-henan__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
  border: 1px solid var(--line);
  filter: saturate(0.75) contrast(1.06);
}

.page-about .about-henan__caption {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.7;
  color: var(--cool);
}

.page-about .about-contact {
  margin: 22px 0 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-contact__row {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-contact__row dt {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--cool);
}

.page-about .about-contact__row dd {
  margin: 0;
  font-size: 14px;
  color: var(--text);
  word-break: break-word;
}

.page-about .about-contact__row a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent-dim);
  transition: color 160ms ease, border-color 160ms ease;
}

.page-about .about-contact__row a:hover,
.page-about .about-contact__row a:focus-visible {
  color: var(--text);
  border-color: var(--text);
  outline: none;
}

.page-about .about-contact__row a:focus-visible {
  box-shadow: 0 0 0 2px var(--focus);
}

.page-about .about-contact__note {
  margin: 14px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--signal);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--cool);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  padding: clamp(22px, 3.4vw, 36px);
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(184, 255, 63, 0.08) 0%, transparent 55%),
    var(--panel);
}

.page-about .about-next__title {
  margin: 0 0 12px;
  font-size: clamp(18px, 2.2vw, 22px);
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .about-next__text {
  margin: 0;
  max-width: 66ch;
  font-size: 14px;
  line-height: 1.82;
  color: var(--muted);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

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

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

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

  .page-about .about-contact__row {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: baseline;
    gap: 12px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-process {
    grid-template-columns: minmax(0, 1.14fr) minmax(0, 0.86fr);
    align-items: start;
    gap: 26px;
  }

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

  .page-about .about-henan {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
    gap: 28px;
  }

  .page-about .about-henan__figure {
    order: 0;
  }
}

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: var(--about-toc-w) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    border-top: none;
    border-left: 1px solid var(--line);
    padding-top: 0;
    padding-left: 18px;
  }

  .page-about .about-toc__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-toc__link {
    width: 100%;
    justify-content: flex-start;
    padding: 9px 10px;
  }

  .page-about .about-canvas {
    gap: clamp(24px, 2.6vw, 34px);
  }

  .page-about .about-board:nth-child(even) {
    margin-left: clamp(0px, 2.4vw, 34px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-board,
  .page-about .about-board::after,
  .page-about .about-coop__card,
  .page-about .about-timeline__item::before,
  .page-about .about-toc__link {
    transition: none;
  }

  .page-about .about-coop__card:hover,
  .page-about .about-coop__card:focus-within {
    transform: none;
  }
}
<<<END>>>