.page-about {
  --about-radius: var(--radius-lg);
  --about-track: 16px;
  background:
    radial-gradient(120% 70% at 82% -8%, rgba(43, 240, 206, .09), transparent 62%),
    radial-gradient(90% 60% at -10% 30%, rgba(124, 134, 240, .07), transparent 60%),
    var(--bg);
  color: var(--ink);
  overflow-x: hidden;
}

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

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 18px var(--gutter) 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--muted);
}

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

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

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(12px, 2vw, 24px) 0 clamp(36px, 6vw, 72px);
}

.page-about .about-hero__frame {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: clamp(400px, 62vw, 560px);
  padding: clamp(28px, 5vw, 64px) clamp(20px, 4vw, 56px) clamp(28px, 4.5vw, 56px);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background: var(--panel);
  overflow: hidden;
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  opacity: .26;
  filter: saturate(.65) contrast(1.08);
  pointer-events: none;
}

.page-about .about-hero__veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(6, 26, 22, .35) 0%, rgba(6, 26, 22, .88) 62%, var(--panel) 100%),
    repeating-linear-gradient(90deg, rgba(23, 66, 58, .55) 0 1px, transparent 1px 84px);
  pointer-events: none;
}

.page-about .about-hero__ticks {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 12px;
  background: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 24px);
  opacity: .9;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 56rem;
}

.page-about .about-hero__anno {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 7.4vw, 74px);
  line-height: 1.02;
  letter-spacing: -.012em;
  color: var(--ink);
}

.page-about .about-hero__em {
  display: block;
  margin-top: 6px;
  color: var(--cyan);
  text-shadow: 0 0 40px rgba(43, 240, 206, .22);
}

.page-about .about-hero__lead {
  max-width: 46ch;
  margin: 0 0 26px;
  font-size: 17px;
  line-height: 1.78;
  color: var(--muted);
}

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

/* ---------- 首屏数据条 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(16px, 2.5vw, 24px) 0 0;
  padding: 1px;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

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

.page-about .about-stats b {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(22px, 4.4vw, 32px);
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-about .about-stats span {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  padding: clamp(44px, 7vw, 84px) 0;
}

.page-about .about-sec--last {
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-about .chapter {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .chapter__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(38px, 8vw, 68px);
  line-height: 1;
  color: var(--cyan);
  opacity: .22;
  letter-spacing: .02em;
}

.page-about .chapter__title {
  margin: 6px 0 10px;
  font-family: var(--font-display);
  font-size: clamp(24px, 4vw, 40px);
  line-height: 1.15;
  letter-spacing: -.008em;
  color: var(--ink);
}

.page-about .chapter__sub {
  max-width: 40ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .prose p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink);
}

.page-about .prose a,
.page-about .about-roster__foot a,
.page-about .about-eco__foot a,
.page-about .about-info__card a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 240, 206, .4);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .prose a:hover,
.page-about .about-roster__foot a:hover,
.page-about .about-eco__foot a:hover,
.page-about .about-info__card a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 非对称分栏 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.5vw, 40px);
  align-items: start;
}

.page-about .about-pullquote {
  padding: 22px 22px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius-md);
  background: var(--panel);
}

.page-about .about-pullquote p {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.6vw, 24px);
  line-height: 1.4;
  color: var(--ink);
}

.page-about .note {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--muted);
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-tl {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  top: 22px;
  bottom: 22px;
  left: var(--about-track);
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--line) 34%, var(--line) 100%);
}

.page-about .about-tl__item {
  position: relative;
  padding-left: 44px;
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: calc(var(--about-track) - 7px);
  top: 24px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--amber);
  box-shadow: 0 0 0 4px rgba(6, 26, 22, .9);
  z-index: 1;
}

.page-about .about-tl__card {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-tl__card[open] {
  border-color: rgba(43, 240, 206, .42);
  background: linear-gradient(180deg, rgba(43, 240, 206, .05), transparent 70%), var(--panel);
}

.page-about .about-tl__card summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 6px 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-tl__card summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -3px;
}

.page-about .about-tl__card summary::after {
  content: "+";
  grid-column: 2;
  grid-row: 1;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-tl__card[open] summary::after {
  content: "−";
  color: var(--orange);
}

.page-about .about-tl__head {
  grid-column: 1;
  grid-row: 1;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-tl__v {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--amber);
  border: 1px solid rgba(243, 194, 75, .45);
  border-radius: var(--radius-pill);
  padding: 2px 10px;
}

.page-about .about-tl__name {
  font-family: var(--font-display);
  font-size: clamp(18px, 2.6vw, 22px);
  letter-spacing: .01em;
  color: var(--ink);
}

.page-about .about-tl__year {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: clamp(18px, 3vw, 24px);
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-about .about-tl__sum {
  grid-column: 1 / -1;
  grid-row: 2;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-tl__body {
  padding: 16px 20px 20px;
  border-top: 1px dashed var(--line);
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 校验流程 ---------- */
.page-about .about-check__steps {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
  counter-reset: none;
}

.page-about .about-check__steps li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(13, 42, 36, .7);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .about-check__steps .num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--orange);
}

.page-about .about-check__figure {
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-check__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.page-about .media__cap {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ---------- 岗位分工 ---------- */
.page-about .about-roster {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-roster__row {
  padding: 16px 18px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-roster__row:hover {
  border-color: rgba(43, 240, 206, .42);
  transform: translateY(-2px);
}

.page-about .about-roster__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .about-roster__role {
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: .02em;
  color: var(--ink);
}

.page-about .about-roster__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 4vw, 32px);
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-about .about-roster__meter {
  position: relative;
  height: 6px;
  margin: 12px 0 12px;
  border-radius: var(--radius-pill);
  background: var(--line);
  overflow: hidden;
}

.page-about .about-roster__fill {
  display: block;
  height: 100%;
  border-radius: var(--radius-pill);
}

.page-about .about-roster__fill--check { width: 32%; background: var(--cyan); }
.page-about .about-roster__fill--input { width: 21%; background: var(--teal); }
.page-about .about-roster__fill--product { width: 29%; background: var(--violet); }
.page-about .about-roster__fill--service { width: 18%; background: var(--orange); }

.page-about .about-roster__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .about-roster__foot {
  max-width: 62ch;
  margin: 22px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  align-items: start;
}

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

.page-about .about-eco__nodes li {
  position: relative;
  padding: 18px 18px 18px 22px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  border-radius: var(--radius-md);
  background: var(--panel);
}

.page-about .about-eco__nodes li:nth-child(2) { border-left-color: var(--cyan); }
.page-about .about-eco__nodes li:nth-child(3) { border-left-color: var(--amber); }

.page-about .about-eco__chip {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 26px;
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-about .about-eco__nodes h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: .02em;
  color: var(--ink);
}

.page-about .about-eco__nodes p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .about-eco__figure {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-eco__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.page-about .about-eco__foot {
  max-width: 64ch;
  margin: 22px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 站点信息 ---------- */
.page-about .about-info {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-info__card {
  padding: 20px 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel);
}

.page-about .about-info__card--wide {
  background: linear-gradient(120deg, rgba(43, 240, 206, .07), transparent 60%), var(--panel);
}

.page-about .about-info__card h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: .03em;
  color: var(--cyan);
}

.page-about .about-info__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink);
}

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

.page-about .about-info__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
  overflow-wrap: anywhere;
}

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

.page-about .about-info__list .num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--amber);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-info__card--wide {
    grid-column: 1 / -1;
  }

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

@media (min-width: 920px) {
  .page-about {
    --about-track: 18px;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-split {
    grid-template-columns: 5fr 7fr;
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-split--reverse .prose {
    order: 2;
  }

  .page-about .about-split--reverse .about-check__figure {
    order: 1;
  }

  .page-about .about-tl__item {
    padding-left: 56px;
  }

  .page-about .about-tl__card summary {
    padding: 20px 24px;
  }

  .page-about .about-tl__body {
    padding: 18px 24px 22px;
  }

  .page-about .about-roster {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__frame {
    min-height: 580px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-roster__row,
  .page-about .about-tl__card,
  .page-about .crumbs a {
    transition: none;
  }

  .page-about .about-roster__row:hover {
    transform: none;
  }
}
<<<END>>>