/* ===== 品牌叙事 / 页面作用域：.page-about ===== */

.page-about {
  --about-measure: 34em;
}

/* ---------- 首屏 ---------- */

.page-about .hero {
  position: relative;
  overflow: hidden;
  padding: 34px 0 46px;
  border-bottom: 1px solid var(--line);
}

.page-about .hero__watermark {
  position: absolute;
  right: -3%;
  top: 0;
  font-size: clamp(104px, 29vw, 296px);
  line-height: .82;
  font-weight: 600;
  letter-spacing: -.05em;
  color: var(--lime);
  opacity: .045;
  pointer-events: none;
  user-select: none;
}

.page-about .hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .hero .breadcrumb {
  margin-bottom: 26px;
}

.page-about .hero__kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .hero__kicker::before {
  content: "";
  width: 30px;
  height: 1px;
  background: var(--lime);
  opacity: .75;
}

.page-about .hero__title {
  margin: 0 0 22px;
  max-width: 16em;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(36px, 7.4vw, 72px);
  line-height: 1.1;
  letter-spacing: -.012em;
  color: var(--text);
}

.page-about .hero__lede {
  margin: 0 0 30px;
  max-width: var(--about-measure);
  font-size: 17px;
  line-height: 1.78;
  color: var(--muted);
}

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

.page-about .hero__scale {
  margin: 42px 0 0;
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--muted);
  opacity: .7;
}

/* ---------- 章节骨架 ---------- */

.page-about .section {
  padding: 56px 0;
}

.page-about .section + .section {
  border-top: 1px solid var(--line);
}

.page-about .about-head {
  margin-bottom: 30px;
}

.page-about .about-kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .about-head h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 5.4vw, 40px);
  line-height: 1.18;
  letter-spacing: -.008em;
  color: var(--text);
}

.page-about .about-lede {
  margin: 0;
  max-width: var(--about-measure);
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 年份索引条 ---------- */

.page-about .tl-nav {
  display: flex;
  gap: 8px;
  margin-bottom: 30px;
  padding-bottom: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .tl-nav::-webkit-scrollbar {
  display: none;
}

.page-about .tl-nav a {
  flex: 0 0 auto;
  padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  transition: color var(--dur) ease, background-color var(--dur) ease, border-color var(--dur) ease;
}

.page-about .tl-nav a:hover,
.page-about .tl-nav a:focus-visible {
  color: var(--on-lime);
  background: var(--lime);
  border-color: var(--lime);
}

/* ---------- 时间轴 ---------- */

.page-about .tl {
  --tl-x: 5px;
  --tl-pad: 30px;
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 38px var(--tl-pad);
}

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

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: var(--tl-x);
  top: 10px;
  bottom: -2px;
  width: 1px;
  background: var(--line);
}

.page-about .tl__item:last-child::before {
  display: none;
}

.page-about .tl__mark {
  position: absolute;
  left: calc(var(--tl-x) - 5px);
  top: 4px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--line);
  transition: background-color var(--dur) ease, border-color var(--dur) ease, box-shadow var(--dur) ease;
}

.page-about .tl__item:hover .tl__mark,
.page-about .tl__item:focus-within .tl__mark {
  background: var(--lime);
  border-color: var(--lime);
  box-shadow: 0 0 0 4px var(--lime-mist);
}

.page-about .tl__year {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 17px;
  letter-spacing: .02em;
  color: var(--lime);
  transition: color var(--dur) ease;
}

.page-about .tl__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-sans);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.42;
  color: var(--text);
}

.page-about .tl__body p {
  margin: 0 0 12px;
  max-width: var(--about-measure);
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
}

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

.page-about .tl__fact {
  display: inline-block;
  padding: 5px 11px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--text);
  background: var(--lime-mist);
  border-left: 2px solid var(--lime);
  border-radius: 0 var(--r-xs) var(--r-xs) 0;
}

.page-about .tl__foot {
  margin: 36px 0 0;
  max-width: var(--about-measure);
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .tl__foot a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid var(--line-hi);
}

.page-about .tl__foot a:hover,
.page-about .tl__foot a:focus-visible {
  border-bottom-color: var(--lime);
}

/* ---------- 团队分工 ---------- */

.page-about .team__banner {
  margin: 0 0 26px;
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .team__banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .team__card {
  position: relative;
  padding: 22px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  transition: transform var(--dur) ease, border-color var(--dur) ease;
}

.page-about .team__card:hover {
  transform: translateY(-2px);
  border-color: var(--line-hi);
}

.page-about .team__code {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--lime);
}

.page-about .team__card h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
}

.page-about .team__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--muted);
}

/* ---------- 目录体系 ---------- */

.page-about .system__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-about .codes {
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .codes li {
  display: flex;
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .codes__k {
  flex: 0 0 26px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--lime);
}

.page-about .codes__t {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
}

.page-about .codes__d {
  display: block;
  margin-top: 3px;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .system__note {
  margin: 0;
  max-width: var(--about-measure);
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

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

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

/* ---------- 协作网络 ---------- */

.page-about .net__stage {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .net__media {
  margin: 0;
  position: relative;
  line-height: 0;
}

.page-about .net__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 14, 34, .28), rgba(7, 14, 34, .92));
  pointer-events: none;
}

.page-about .net__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-about .net__nodes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: 0;
  padding: 10px;
  list-style: none;
}

.page-about .net__node {
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--surface);
  transition: transform var(--dur) ease, border-color var(--dur) ease, background-color var(--dur) ease;
}

.page-about .net__node:hover,
.page-about .net__node:focus-within {
  transform: translateY(-2px);
  border-color: var(--line-hi);
  background: var(--surface-hi);
}

.page-about .net__dot {
  display: block;
  width: 8px;
  height: 8px;
  margin-bottom: 12px;
  border-radius: 50%;
  background: var(--orange);
  transition: background-color var(--dur) ease, box-shadow var(--dur) ease;
}

.page-about .net__node:hover .net__dot {
  background: var(--lime);
  box-shadow: 0 0 0 4px var(--lime-mist);
}

.page-about .net__label {
  display: block;
  margin-bottom: 10px;
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .net__node h3 {
  margin: 0 0 7px;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
}

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

.page-about .net__foot {
  margin: 22px 0 0;
  max-width: var(--about-measure);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 被记住的节点 ---------- */

.page-about .marks__list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .marks__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .marks__time {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--orange);
}

.page-about .marks__item h3 {
  margin: 0 0 8px;
  font-size: 17.5px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text);
}

.page-about .marks__item p {
  margin: 0;
  max-width: var(--about-measure);
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 我们看重的事 ---------- */

.page-about .values__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .values__card {
  padding: 26px 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: linear-gradient(158deg, var(--surface), var(--ink-2));
  transition: transform var(--dur) ease, border-color var(--dur) ease, box-shadow var(--dur) ease;
}

.page-about .values__card:hover {
  transform: translateY(-2px);
  border-color: var(--line-hi);
  box-shadow: var(--shadow-lift);
}

.page-about .values__card:focus-visible {
  transform: translateY(-2px);
  outline: 2px solid var(--lime);
  outline-offset: 2px;
  background: linear-gradient(158deg, var(--surface-hi), var(--ink-2));
}

.page-about .values__num {
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--lime);
}

.page-about .values__card h3 {
  margin: 0 0 10px;
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text);
}

.page-about .values__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--muted);
}

/* ---------- 收尾 ---------- */

.page-about .section--closing {
  border-top: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 88% 10%, var(--lime-mist), transparent 62%),
    var(--ink-2);
}

.page-about .closing__inner {
  max-width: 720px;
}

.page-about .closing__inner h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 4.8vw, 36px);
  line-height: 1.22;
  color: var(--text);
}

.page-about .closing__lede {
  margin: 0 0 26px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

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

/* ---------- 平板与桌面 ---------- */

@media (min-width: 700px) {
  .page-about .team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 860px) {
  .page-about .hero {
    padding: 48px 0 60px;
  }

  .page-about .section {
    padding: 76px 0;
  }

  .page-about .values__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .net__nodes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    padding: 12px;
  }

  .page-about .marks__item {
    grid-template-columns: 130px minmax(0, 1fr);
    gap: 30px;
    align-items: start;
    padding: 24px 0;
  }

  .page-about .marks__time {
    padding-top: 3px;
  }
}

@media (min-width: 900px) {
  .page-about .tl {
    --tl-x: 168px;
    --tl-pad: 208px;
  }

  .page-about .tl__item {
    padding-bottom: 46px;
  }

  .page-about .tl__year {
    position: absolute;
    left: 0;
    top: 4px;
    width: 140px;
    margin: 0;
    text-align: right;
    font-size: clamp(26px, 2.7vw, 38px);
    line-height: 1;
    letter-spacing: -.01em;
  }

  .page-about .tl__mark {
    top: 6px;
  }

  .page-about .tl__item::before {
    top: 12px;
  }
}

@media (min-width: 980px) {
  .page-about .team__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .system__grid {
    grid-template-columns: minmax(0, 1fr) 358px;
    gap: 52px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team__card,
  .page-about .values__card,
  .page-about .net__node,
  .page-about .tl__mark,
  .page-about .net__dot,
  .page-about .tl-nav a {
    transition: none;
  }

  .page-about .team__card:hover,
  .page-about .values__card:hover,
  .page-about .values__card:focus-visible,
  .page-about .net__node:hover,
  .page-about .net__node:focus-within {
    transform: none;
  }
}
<<<END>>>


/* ===== 品牌叙事 / 页面作用域：.page-about ===== */

.page-about {
  --about-measure: 34em;
}

/* ---------- 首屏 ---------- */

.page-about .hero {
  position: relative;
  overflow: hidden;
  padding: 34px 0 46px;
  border-bottom: 1px solid var(--line);
}

.page-about .hero__watermark {
  position: absolute;
  right: -3%;
  top: 0;
  font-family: var(--font-mono);
  font-size: clamp(104px, 29vw, 296px);
  line-height: .82;
  font-weight: 600;
  letter-spacing: -.05em;
  color: var(--lime);
  opacity: .05;
  pointer-events: none;
  user-select: none;
}

.page-about .hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .hero .breadcrumb {
  margin-bottom: 26px;
}

.page-about .hero__kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .hero__kicker::before {
  content: "";
  width: 30px;
  height: 1px;
  background: currentColor;
  opacity: .8;
}

.page-about .hero__title {
  margin: 0 0 22px;
  max-width: 16em;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(36px, 7.4vw, 72px);
  line-height: 1.1;
  letter-spacing: -.012em;
  color: var(--text);
}

.page-about .hero__lede {
  margin: 0 0 30px;
  max-width: var(--about-measure);
  font-size: 17px;
  line-height: 1.78;
  color: var(--muted);
}

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

.page-about .hero__scale {
  margin: 40px 0 0;
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--muted);
  opacity: .7;
}

/* ---------- 章节骨架 ---------- */

.page-about .section {
  padding: 56px 0;
}

.page-about .section + .section {
  border-top: 1px solid var(--line);
}

.page-about .about-head {
  margin-bottom: 30px;
}

.page-about .about-kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .about-head h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 5.4vw, 40px);
  line-height: 1.18;
  letter-spacing: -.008em;
  color: var(--text);
}

.page-about .about-lede {
  margin: 0;
  max-width: var(--about-measure);
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 年份索引条 ---------- */

.page-about .tl-nav {
  display: flex;
  gap: 8px;
  margin-bottom: 30px;
  padding-bottom: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .tl-nav::-webkit-scrollbar {
  display: none;
}

.page-about .tl-nav a {
  flex: 0 0 auto;
  padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .05em;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  transition: color var(--dur) ease, background-color var(--dur) ease, border-color var(--dur) ease;
}

.page-about .tl-nav a:hover,
.page-about .tl-nav a:focus-visible {
  color: var(--on-lime);
  background: var(--lime);
  border-color: var(--lime);
}

/* ---------- 时间轴 ---------- */

.page-about .tl {
  --tl-x: 5px;
  --tl-pad: 30px;
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 38px var(--tl-pad);
}

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

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: var(--tl-x);
  top: 12px;
  bottom: -2px;
  width: 1px;
  background: var(--line);
}

.page-about .tl__item:last-child::before {
  display: none;
}

.page-about .tl__mark {
  position: absolute;
  left: calc(var(--tl-x) - 5px);
  top: 4px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--line);
  transition: background-color var(--dur) ease, border-color var(--dur) ease, box-shadow var(--dur) ease;
}

.page-about .tl__item:hover .tl__mark,
.page-about .tl__item:focus-within .tl__mark {
  background: var(--lime);
  border-color: var(--lime);
  box-shadow: 0 0 0 4px var(--lime-mist);
}

.page-about .tl__year {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--lime);
  transition: color var(--dur) ease;
}

.page-about .tl__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-sans);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.42;
  color: var(--text);
}

.page-about .tl__body p {
  margin: 0 0 12px;
  max-width: var(--about-measure);
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
}

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

.page-about .tl__fact {
  display: inline-block;
  padding: 5px 11px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--text);
  background: var(--lime-mist);
  border-left: 2px solid var(--lime);
  border-radius: 0 var(--r-xs) var(--r-xs) 0;
}

.page-about .tl__foot {
  margin: 36px 0 0;
  max-width: var(--about-measure);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .tl__foot a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid var(--line-hi);
}

.page-about .tl__foot a:hover,
.page-about .tl__foot a:focus-visible {
  border-bottom-color: var(--lime);
}

/* ---------- 团队分工 ---------- */

.page-about .team__banner {
  margin: 0 0 26px;
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .team__card {
  padding: 22px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  transition: transform var(--dur) ease, border-color var(--dur) ease;
}

.page-about .team__card:hover,
.page-about .team__card:focus-within {
  transform: translateY(-2px);
  border-color: var(--line-hi);
}

.page-about .team__code {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--lime);
}

.page-about .team__card h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
}

.page-about .team__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--muted);
}

/* ---------- 目录体系 ---------- */

.page-about .system__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-about .codes {
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .codes li {
  display: flex;
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .codes__k {
  flex: 0 0 26px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--lime);
}

.page-about .codes__t {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
}

.page-about .codes__d {
  display: block;
  margin-top: 3px;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.66;
  color: var(--muted);
}

.page-about .system__note {
  margin: 0;
  max-width: var(--about-measure);
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

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

.page-about .system__figure img {
  width: 100%;
  height: auto;
}

/* ---------- 协作网络 ---------- */

.page-about .net__stage {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .net__media {
  position: relative;
  margin: 0;
  line-height: 0;
}

.page-about .net__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 14, 34, .2), rgba(7, 14, 34, .88));
  pointer-events: none;
}

.page-about .net__media img {
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-about .net__nodes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: 0;
  padding: 10px;
  list-style: none;
}

.page-about .net__node {
  padding: 20px 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  transition: transform var(--dur) ease, border-color var(--dur) ease, background-color var(--dur) ease;
}

.page-about .net__node:hover,
.page-about .net__node:focus-within {
  transform: translateY(-2px);
  border-color: var(--line-hi);
  background: var(--surface-hi);
}

.page-about .net__dot {
  display: block;
  width: 8px;
  height: 8px;
  margin-bottom: 12px;
  border-radius: 50%;
  background: var(--orange);
  transition: background-color var(--dur) ease, box-shadow var(--dur) ease;
}

.page-about .net__node:hover .net__dot {
  background: var(--lime);
  box-shadow: 0 0 0 4px var(--lime-mist);
}

.page-about .net__label {
  display: block;
  margin-bottom: 10px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .net__node h3 {
  margin: 0 0 7px;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
}

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

.page-about .net__foot {
  margin: 22px 0 0;
  max-width: var(--about-measure);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 被记住的节点 ---------- */

.page-about .marks__list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .marks__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .marks__time {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--orange);
}

.page-about .marks__item h3 {
  margin: 0 0 8px;
  font-size: 17.5px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text);
}

.page-about .marks__item p {
  margin: 0;
  max-width: var(--about-measure);
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 我们看重的事 ---------- */

.page-about .values__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .values__card {
  padding: 26px 22px 24px;
  background: linear-gradient(158deg, var(--surface), var(--ink-2));
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  transition: transform var(--dur) ease, border-color var(--dur) ease, box-shadow var(--dur) ease;
}

.page-about .values__card:hover {
  transform: translateY(-2px);
  border-color: var(--line-hi);
  box-shadow: var(--shadow-lift);
}

.page-about .values__card:focus-visible {
  transform: translateY(-2px);
  outline: 2px solid var(--lime);
  outline-offset: 2px;
  background: linear-gradient(158deg, var(--surface-hi), var(--ink-2));
}

.page-about .values__num {
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--lime);
}

.page-about .values__card h3 {
  margin: 0 0 10px;
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text);
}

.page-about .values__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--muted);
}

/* ---------- 收尾 ---------- */

.page-about .section--closing {
  background:
    radial-gradient(120% 90% at 88% 10%, var(--lime-mist), transparent 62%),
    var(--ink-2);
}

.page-about .closing__inner {
  max-width: 720px;
}

.page-about .closing__inner h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 4.8vw, 36px);
  line-height: 1.22;
  color: var(--text);
}

.page-about .closing__lede {
  margin: 0 0 26px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-about .team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 860px) {
  .page-about .hero {
    padding: 48px 0 60px;
  }

  .page-about .section {
    padding: 76px 0;
  }

  .page-about .values__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .net__nodes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    padding: 12px;
  }

  .page-about .marks__item {
    grid-template-columns: 130px minmax(0, 1fr);
    gap: 30px;
    align-items: start;
    padding: 24px 0;
  }

  .page-about .marks__time {
    padding-top: 3px;
  }
}

@media (min-width: 900px) {
  .page-about .tl {
    --tl-x: 168px;
    --tl-pad: 208px;
  }

  .page-about .tl__item {
    padding-bottom: 46px;
  }

  .page-about .tl__year {
    position: absolute;
    left: 0;
    top: 4px;
    width: 140px;
    margin: 0;
    text-align: right;
    font-size: clamp(26px, 2.7vw, 38px);
    line-height: 1;
    letter-spacing: -.01em;
  }

  .page-about .tl__mark {
    top: 6px;
  }

  .page-about .tl__item::before {
    top: 14px;
  }
}

@media (min-width: 980px) {
  .page-about .team__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .system__grid {
    grid-template-columns: minmax(0, 1fr) 358px;
    gap: 52px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team__card,
  .page-about .values__card,
  .page-about .net__node,
  .page-about .net__dot,
  .page-about .tl__mark,
  .page-about .tl-nav a {
    transition: none;
  }

  .page-about .team__card:hover,
  .page-about .team__card:focus-within,
  .page-about .values__card:hover,
  .page-about .values__card:focus-visible,
  .page-about .net__node:hover,
  .page-about .net__node:focus-within {
    transform: none;
  }
}
<<<END>>>