.page-about {
  background: var(--ink);
  color: var(--white);
  font-family: var(--font-body);
  padding-bottom: clamp(48px, 8vw, 96px);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .page-about-crumbs {
  padding-top: calc(var(--header-h) + var(--rail-h) + 20px);
}

.page-about .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-about .crumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-about .crumbs a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .crumbs a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .crumbs [aria-current="page"] {
  color: var(--white);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(22px, 4vw, 42px);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: end;
}

.page-about .about-hero-copy .kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero-copy h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 5.6vw, 52px);
  line-height: 1.12;
  letter-spacing: .015em;
  max-width: 15em;
}

.page-about .about-hero-copy .lede {
  margin: 0;
  font-size: clamp(14.5px, 1.6vw, 16px);
  line-height: 1.8;
  color: rgba(242, 247, 250, .82);
  max-width: 36em;
}

.page-about .about-hero-figure {
  margin: 0;
}

.page-about .about-hero-media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-2);
  aspect-ratio: 14 / 9;
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.9) contrast(1.05);
}

.page-about .about-hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(155deg, var(--glow-cy), transparent 46%, var(--glow-or));
}

.page-about .about-hero-figure .media-cap {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .04em;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 版本带 ---------- */
.page-about .about-band-wrap {
  margin-top: clamp(30px, 5vw, 54px);
}

.page-about .band-caption {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
}

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

.page-about .band-cell {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 104px;
  padding: 18px 14px 20px;
  background: var(--ink-2);
  transition: background .2s var(--ease);
}

.page-about .band-cell::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: rgba(143, 163, 180, .3);
}

.page-about .band-cell:not(.band-cell--now):hover {
  background: var(--panel);
}

.page-about .band-idx {
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1.1;
  letter-spacing: .04em;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

.page-about .band-name {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--white);
}

.page-about .band-note {
  margin-top: auto;
  font-size: 11.5px;
  line-height: 1.55;
  color: var(--muted);
}

.page-about .band-cell--now {
  background: linear-gradient(180deg, rgba(43, 224, 210, .1), rgba(43, 224, 210, 0) 62%), var(--panel);
  box-shadow: inset 0 0 0 1px var(--cyan);
}

.page-about .band-cell--now::before {
  height: 3px;
  background: var(--cyan);
}

.page-about .band-cell--now .band-idx {
  color: var(--cyan);
}

.page-about .band-cell--now .band-name {
  color: var(--white);
}

/* ---------- 主体布局 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(34px, 5vw, 62px);
}

.page-about .about-catalog {
  display: none;
}

.page-about .cat-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .cat-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .cat-list a {
  display: block;
  margin-left: -1px;
  padding: 8px 0 8px 12px;
  border-left: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.45;
  color: var(--muted);
  text-decoration: none;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-about .cat-list a:hover {
  color: var(--cyan);
  border-left-color: var(--cyan);
}

.page-about .cat-list a:focus-visible {
  color: var(--cyan);
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: clamp(26px, 3.5vw, 40px) 0;
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: calc(var(--header-h) + var(--rail-h) + 24px);
}

.page-about .about-flow > .about-section:first-child {
  border-top-color: var(--line-cy);
}

.page-about .sec-rail {
  display: flex;
  flex-direction: row;
  align-items: baseline;
  gap: 12px;
}

.page-about .rail-no {
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
  color: var(--cyan);
}

.page-about .rail-label {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}

.page-about .sec-body h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(19px, 2.6vw, 25px);
  line-height: 1.35;
  letter-spacing: .02em;
  color: var(--white);
}

.page-about .sec-body p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(242, 247, 250, .86);
  max-width: 40em;
}

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

.page-about .sec-body--annot {
  position: relative;
}

.page-about a.inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cy);
  transition: border-color .16s var(--ease), color .16s var(--ease);
}

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

.page-about a.inline-link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 生产节奏数据 ---------- */
.page-about .prod-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  margin-top: 20px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .prod-cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px 18px;
  background: var(--ink-2);
}

.page-about .prod-value {
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
  color: var(--cyan);
}

.page-about .prod-unit {
  margin-left: 3px;
  font-size: 12px;
  color: var(--muted);
}

.page-about .prod-name {
  font-size: 12px;
  line-height: 1.55;
  color: var(--muted);
}

/* ---------- 版本列表 ---------- */
.page-about .ver-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .ver-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 16px 16px 18px;
  background: var(--ink-2);
}

.page-about .ver-id {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: .06em;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

.page-about .ver-name {
  display: block;
  margin-bottom: 5px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .03em;
  color: var(--white);
}

.page-about .ver-why {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: rgba(242, 247, 250, .82);
  max-width: 40em;
}

.page-about .ver-item--now {
  background: var(--panel);
  box-shadow: inset 3px 0 0 0 var(--cyan);
}

.page-about .ver-item--now .ver-id {
  color: var(--cyan);
}

.page-about .ver-figure,
.page-about .spec-figure {
  margin: 20px 0 0;
}

.page-about .ver-media,
.page-about .spec-media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-2);
  aspect-ratio: 3 / 2;
}

.page-about .ver-media img,
.page-about .spec-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.85) contrast(1.04);
}

.page-about .ver-media::after,
.page-about .spec-media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(200deg, var(--glow-cy), transparent 52%, rgba(10, 22, 34, .55));
}

.page-about .ver-figure .media-cap,
.page-about .spec-figure .media-cap {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .04em;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 口径清单 ---------- */
.page-about .spec-list {
  display: grid;
  gap: 1px;
  margin-top: 18px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .spec-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 12px 14px;
  background: var(--ink-2);
}

.page-about .spec-key {
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
}

.page-about .spec-val {
  font-family: var(--font-mono);
  font-size: 14.5px;
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
  color: var(--white);
}

.page-about .annot {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-about .annot--rot {
  display: none;
}

/* ---------- 栏目表格 ---------- */
.page-about .team-wrap {
  margin-top: 18px;
  border: 1px solid var(--line-soft);
  background: var(--ink-2);
  overflow-x: auto;
}

.page-about .team-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 13.5px;
  line-height: 1.65;
}

.page-about .team-table thead th {
  padding: 12px 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

.page-about .team-table tbody th {
  padding: 14px;
  text-align: left;
  font-weight: 600;
  font-size: 13.5px;
  letter-spacing: .03em;
  color: var(--cyan);
  vertical-align: top;
  white-space: nowrap;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .team-table tbody td {
  padding: 14px;
  vertical-align: top;
  color: rgba(242, 247, 250, .82);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .team-table tbody tr:last-child th,
.page-about .team-table tbody tr:last-child td {
  border-bottom: 0;
}

/* ---------- 生态数据 ---------- */
.page-about .coop-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  margin: 20px 0 0;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .coop-cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 16px 20px;
  background: var(--ink-2);
}

.page-about .coop-num {
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.015em;
  color: var(--cyan);
}

.page-about .coop-unit {
  margin-left: 3px;
  font-size: 13px;
  color: var(--muted);
}

.page-about .coop-label {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about #sec-partner .coop-cell:nth-child(2) .coop-num {
  color: var(--yellow);
}

.page-about #sec-partner .coop-cell:nth-child(3) .coop-num {
  color: var(--orange);
}

.page-about #sec-partner .coop-cell:nth-child(6) .coop-num {
  color: var(--green);
}

/* ---------- 服务边界 ---------- */
.page-about .edge-panel {
  position: relative;
  margin-top: 18px;
  padding: 22px 18px 22px;
  border: 1px solid var(--line);
  background: var(--ink-2);
}

.page-about .edge-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 68px;
  height: 3px;
  background: var(--orange);
}

.page-about .edge-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-about .edge-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(242, 247, 250, .86);
  max-width: 42em;
}

.page-about .edge-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .spec-row {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }

  .page-about .spec-val {
    text-align: right;
  }

  .page-about .ver-item {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 18px;
    align-items: start;
  }
}

@media (min-width: 700px) {
  .page-about .about-band {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  }

  .page-about .about-section {
    grid-template-columns: 68px minmax(0, 1fr);
    gap: 20px;
  }

  .page-about .sec-rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .page-about .rail-no {
    font-size: 22px;
  }
}

@media (min-width: 1020px) {
  .page-about .about-layout {
    grid-template-columns: 176px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-catalog {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + var(--rail-h) + 28px);
  }
}

@media (min-width: 1140px) {
  .page-about .sec-body--annot .annot--rot {
    display: block;
    position: absolute;
    right: -32px;
    top: 12px;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    transform: rotate(180deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .band-cell,
  .page-about .cat-list a,
  .page-about .crumbs a,
  .page-about a.inline-link {
    transition: none;
  }
}
<<<END>>>