.page-about {
  --ab-gutter: clamp(16px, 4vw, 24px);
  --ab-pad-y: clamp(48px, 8vw, 96px);
  background: var(--ink-green);
  color: var(--paper);
  font-family: var(--sans);
}

.page-about .container {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--ab-gutter);
}

.page-about .section {
  padding-block: var(--ab-pad-y);
}

.page-about .section--tight {
  padding-block: clamp(32px, 5vw, 56px);
}

.page-about .about-link {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid var(--lime-line);
  padding-bottom: 1px;
  transition: border-color 180ms var(--ease), color 180ms var(--ease);
}

.page-about .about-link:hover {
  border-bottom-color: var(--lime);
}

.page-about .about-link--dark {
  color: var(--ink-green);
  border-bottom-color: rgba(7, 19, 15, .35);
}

.page-about .about-link--dark:hover {
  border-bottom-color: var(--ink-green);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(56px, 8vw, 96px) clamp(40px, 6vw, 72px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -1px -1px -1px 42%;
  background: linear-gradient(160deg, var(--night-blue), #0a1526);
  clip-path: polygon(28% 0, 100% 0, 100% 100%, 0 100%);
  z-index: 0;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset-inline-start: 41.4%;
  bottom: 0;
  top: 0;
  width: 1px;
  background: var(--lime-line);
  transform: skewX(-9deg);
  opacity: .55;
  z-index: 0;
}

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

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 56px);
  margin-top: clamp(20px, 4vw, 36px);
}

.page-about .about-hero__kicker {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--lime);
  margin: 0 0 14px;
  text-transform: uppercase;
}

.page-about .about-hero__title {
  font-size: clamp(32px, 7.2vw, 68px);
  font-weight: 800;
  line-height: .98;
  letter-spacing: -.02em;
  margin: 0 0 clamp(18px, 3vw, 26px);
  color: var(--paper);
}

.page-about .about-hero__text {
  font-size: 16px;
  line-height: 1.75;
  color: var(--chalk);
  max-width: 46ch;
  margin: 0 0 clamp(22px, 3vw, 32px);
}

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

.page-about .about-hero__anchor {
  align-self: end;
  padding-inline-start: 18px;
  border-inline-start: 1px solid var(--line);
}

.page-about .about-hero__year {
  display: block;
  font-size: clamp(56px, 15vw, 108px);
  font-weight: 200;
  line-height: .86;
  letter-spacing: -.04em;
  color: var(--lime);
}

.page-about .about-hero__year-cap {
  margin: 12px 0 22px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--chalk);
}

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

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 13px;
  color: var(--chalk);
  border-top: 1px solid var(--line);
  padding-top: 8px;
}

.page-about .about-hero__facts .mono {
  color: var(--paper);
  font-size: 14px;
  min-width: 4.5em;
}

/* ---------- 命名由来 ---------- */
.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-about .about-origin__prose p {
  margin: 0 0 1.1em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--paper);
  max-width: 60ch;
}

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

.page-about .about-origin__keys {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-origin__keys li {
  display: grid;
  grid-template-columns: 6.5em minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding-block: 12px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.6;
  color: var(--chalk);
}

.page-about .about-origin__key {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--lime);
}

.page-about .about-origin__media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--stand-slate);
  box-shadow: var(--shadow-soft);
}

/* ---------- 看台阶梯 ---------- */
.page-about .about-stand {
  background: linear-gradient(180deg, rgba(22, 36, 31, .9), rgba(12, 27, 51, .55));
  border-block: 1px solid var(--line);
}

.page-about .about-stand__intro {
  max-width: 56ch;
  margin: 0 0 clamp(22px, 4vw, 36px);
  font-size: 16px;
  line-height: 1.75;
  color: var(--chalk);
}

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

.page-about .stand__tier {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 6px 16px;
  padding: clamp(16px, 3vw, 24px);
  background: rgba(7, 19, 15, .58);
  border: 1px solid var(--line);
  border-inline-start: 2px solid var(--lime-dim);
  transition: border-color 200ms var(--ease), background-color 200ms var(--ease);
}

.page-about .stand__tier:hover {
  border-inline-start-color: var(--lime);
  background: rgba(22, 36, 31, .86);
}

.page-about .stand__no {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--lime);
  padding-top: 4px;
}

.page-about .stand__main {
  min-width: 0;
}

.page-about .stand__name {
  margin: 0 0 8px;
  font-size: clamp(17px, 2.4vw, 20px);
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.3;
  color: var(--paper);
}

.page-about .stand__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--chalk);
  max-width: 62ch;
}

.page-about .stand__meta {
  grid-column: 2;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--brick);
}

.page-about .about-stand__foot {
  margin: clamp(20px, 3vw, 28px) 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--chalk);
}

/* ---------- 编辑部 ---------- */
.page-about .about-desk__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-about .about-desk__roles {
  display: grid;
  gap: 12px;
}

.page-about .desk-role {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 18px;
  padding: clamp(16px, 3vw, 22px);
  background: var(--stand-slate);
  border: 1px solid var(--line);
}

.page-about .desk-role__num {
  grid-row: span 2;
  font-size: clamp(38px, 8vw, 56px);
  font-weight: 200;
  line-height: .9;
  letter-spacing: -.04em;
  color: var(--lime);
  align-self: start;
}

.page-about .desk-role__name {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  color: var(--paper);
}

.page-about .desk-role__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--chalk);
}

.page-about .about-desk__media {
  margin: 0;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}

.page-about .about-desk__note {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding-inline-start: 14px;
  border-inline-start: 2px solid var(--brick);
  font-size: 14px;
  line-height: 1.75;
  color: var(--chalk);
  max-width: 64ch;
}

/* ---------- 工序 ---------- */
.page-about .about-flow {
  background: var(--night-blue);
  border-block: 1px solid var(--line);
}

.page-about .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: flow;
}

.page-about .flow__step {
  position: relative;
  padding: 20px 18px 22px;
  border-top: 2px solid var(--lime-dim);
  background: linear-gradient(180deg, rgba(201, 255, 61, .07), rgba(201, 255, 61, 0));
}

.page-about .flow__num {
  display: block;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--lime);
  margin-bottom: 10px;
}

.page-about .flow__name {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 800;
  color: var(--paper);
}

.page-about .flow__desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--chalk);
}

.page-about .about-flow__note {
  margin: clamp(20px, 3vw, 28px) 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper);
  max-width: 66ch;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-about .timeline {
  list-style: none;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
}

.page-about .timeline__item {
  position: relative;
  padding-inline-start: 22px;
  border-inline-start: 1px solid var(--line-strong);
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  inset-inline-start: -4.5px;
  top: 24px;
  width: 8px;
  height: 8px;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(201, 255, 61, .12);
  transition: box-shadow 200ms var(--ease);
}

.page-about .timeline__item:hover::before {
  box-shadow: 0 0 0 7px rgba(201, 255, 61, .2);
}

.page-about .timeline__detail {
  padding-block: 14px 18px;
}

.page-about .timeline__sum {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .timeline__year {
  font-size: 20px;
  letter-spacing: .02em;
  color: var(--brick);
  font-weight: 700;
}

.page-about .timeline__label {
  font-size: clamp(16px, 2.2vw, 18px);
  font-weight: 800;
  color: var(--paper);
  letter-spacing: -.01em;
}

.page-about .timeline__detail[open] .timeline__label {
  color: var(--lime);
}

.page-about .timeline__body {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--chalk);
  max-width: 56ch;
}

.page-about .about-timeline__media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--stand-slate);
  box-shadow: var(--shadow-soft);
}

/* ---------- 标准（反白区块） ---------- */
.page-about .about-standard {
  background: var(--paper);
  color: var(--ink-green);
}

.page-about .about-standard__index {
  display: block;
  font-size: 12px;
  letter-spacing: .16em;
  color: #4a6b22;
  margin-bottom: 14px;
}

.page-about .about-standard__title {
  margin: 0 0 clamp(24px, 4vw, 40px);
  font-size: clamp(26px, 4.4vw, 44px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--ink-green);
  max-width: 22ch;
}

.page-about .about-standard__cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
}

.page-about .std-item {
  padding-top: 16px;
  border-top: 1px solid rgba(7, 19, 15, .18);
}

.page-about .std-item__name {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 800;
  color: var(--ink-green);
}

.page-about .std-item__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: #2b3b33;
}

.page-about .about-standard__foot {
  margin: clamp(24px, 4vw, 36px) 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: #2b3b33;
  max-width: 68ch;
}

/* ---------- 信任行 ---------- */
.page-about .about-trust {
  border-top: 1px solid var(--line);
}

.page-about .about-trust__inner {
  display: grid;
  gap: 12px;
}

.page-about .about-trust__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--paper);
  max-width: 68ch;
}

.page-about .about-trust__stamp {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--chalk);
}

/* ---------- 后续入口 ---------- */
.page-about .about-next {
  border-top: 1px solid var(--line);
  padding-bottom: clamp(48px, 8vw, 88px);
}

.page-about .about-next__inner {
  display: grid;
  gap: 18px;
}

.page-about .about-next__lead {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--chalk);
  max-width: 52ch;
}

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

/* ---------- 媒体 ---------- */
.page-about .media-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
}

.page-about .media-frame__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.page-about .media-frame__cap {
  display: block;
  padding: 10px 12px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--chalk);
  background: rgba(7, 19, 15, .7);
  border-top: 1px solid var(--line);
}

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

  .page-about .about-trust__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 24px;
  }

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 24px;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr);
    align-items: end;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-origin__media {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
  }

  .page-about .about-desk__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: clamp(28px, 4vw, 48px);
  }

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

  .page-about .desk-role:nth-child(2) {
    margin-inline-start: 8%;
  }

  .page-about .desk-role:nth-child(3) {
    margin-inline-start: 16%;
  }

  .page-about .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .flow__step:not(:last-child)::after {
    content: "";
    position: absolute;
    inset-inline-end: -9px;
    top: 26px;
    width: 8px;
    height: 8px;
    border-top: 1px solid var(--lime-line);
    border-right: 1px solid var(--lime-line);
    transform: rotate(45deg);
  }

  .page-about .about-timeline__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: clamp(32px, 5vw, 56px);
  }

  .page-about .about-timeline__media {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
  }

  .page-about .stand__tier:nth-child(1) {
    grid-template-columns: 44px minmax(0, 1fr) auto;
    margin-inline-start: 0;
  }

  .page-about .stand__tier:nth-child(2) {
    grid-template-columns: 44px minmax(0, 1fr) auto;
    margin-inline-start: 3%;
  }

  .page-about .stand__tier:nth-child(3) {
    grid-template-columns: 44px minmax(0, 1fr) auto;
    margin-inline-start: 6%;
  }

  .page-about .stand__tier:nth-child(4) {
    grid-template-columns: 44px minmax(0, 1fr) auto;
    margin-inline-start: 9%;
  }

  .page-about .stand__meta {
    grid-column: auto;
    align-self: start;
    text-align: end;
    padding-top: 4px;
  }

  .page-about .about-standard__cols {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(24px, 3.5vw, 40px);
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero::before {
    inset-inline-start: 40%;
  }

  .page-about .about-hero::after {
    inset-inline-start: 39.4%;
  }

  .page-about .stand__tier {
    padding-inline: clamp(22px, 3vw, 30px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
  }
}
<<<PAGE_CSS_END>>>