.page-about {
  --about-gap: clamp(18px, 3vw, 32px);
  --about-node: 250px;
  color: var(--muted);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .kicker {
  color: var(--cyan);
}

.page-about .about-hero {
  position: relative;
  padding: clamp(40px, 7vw, 92px) 0 clamp(34px, 5vw, 64px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 82% 18%, rgba(53, 240, 220, .1), transparent 46%),
    radial-gradient(circle at 8% 84%, rgba(255, 106, 26, .12), transparent 42%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  max-width: 940px;
  padding-left: clamp(14px, 2.4vw, 26px);
  border-left: 3px solid var(--orange);
}

.page-about .about-hero h1 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(30px, 6.2vw, 56px);
  line-height: 1.14;
  letter-spacing: -.01em;
  color: var(--white);
  margin: 10px 0 18px;
}

.page-about .about-hero .lede {
  max-width: 720px;
  font-size: clamp(16px, 1.9vw, 18px);
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 1px;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 1px;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-hero__stats .stat {
  background: var(--ink-900);
  padding: 16px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-hero__stats .stat__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 3.4vw, 30px);
  font-weight: 700;
  line-height: 1;
  color: var(--white);
}

.page-about .about-hero__stats .stat--accent .stat__value {
  color: var(--orange);
}

.page-about .about-hero__stats .stat--data .stat__value {
  color: var(--cyan);
}

.page-about .about-hero__stats .stat__label {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-about .about-hero__scale {
  margin-top: clamp(24px, 4vw, 40px);
  height: 10px;
  background-image: repeating-linear-gradient(to right, var(--line) 0 1px, transparent 1px 26px);
}

.page-about .about-chapters {
  border-bottom: 1px solid var(--line);
  background: var(--ink-800);
}

.page-about .about-chapters__inner {
  display: flex;
  gap: clamp(16px, 3vw, 34px);
  overflow-x: auto;
  padding-top: 14px;
  padding-bottom: 14px;
  scrollbar-width: thin;
}

.page-about .about-chapters__link {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  padding-bottom: 3px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-chapters__link:hover,
.page-about .about-chapters__link:focus-visible {
  color: var(--white);
  border-color: var(--orange);
}

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

.page-about .about-block {
  max-width: 780px;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .section__title {
  color: var(--white);
  margin: 10px 0 14px;
}

.page-about .section__lede {
  font-size: clamp(15px, 1.8vw, 17px);
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 时间刻度 ---------- */

.page-about .about-timeline .media-frame {
  margin: 0 0 clamp(28px, 4vw, 48px);
}

.page-about .about-timeline__track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(var(--about-node), 1fr);
  gap: var(--about-gap);
  list-style: none;
  margin: 0;
  padding: 6px 0 18px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
}

.page-about .about-timeline__node {
  position: relative;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  scroll-snap-align: start;
}

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 106, 26, .16);
}

.page-about .about-timeline__item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  padding-right: 26px;
}

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

.page-about .about-timeline__item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-timeline__item[open] summary::after {
  content: "−";
}

.page-about .about-timeline__item summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-about .about-timeline__year {
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
}

.page-about .about-timeline__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-timeline__note {
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 矩阵 ---------- */

.page-about .about-matrix {
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-matrix__inner {
  min-width: 680px;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-matrix__row {
  display: grid;
  grid-template-columns: 1.7fr repeat(4, 1fr);
  background: var(--ink-900);
  transition: background .2s var(--ease);
}

.page-about .about-matrix__row:hover {
  background: var(--ink-800);
}

.page-about .about-matrix__row--head {
  background: var(--ink-800);
}

.page-about .about-matrix__row--head:hover {
  background: var(--ink-800);
}

.page-about .about-matrix__row > span {
  padding: 14px 16px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--muted);
}

.page-about .about-matrix__row--head > span {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-matrix__row > span:first-child {
  color: var(--white);
  font-weight: 600;
}

.page-about .about-matrix__row > span:first-child em {
  display: block;
  margin-top: 4px;
  font-style: normal;
  font-size: 12.5px;
  font-weight: 400;
  color: var(--muted);
}

/* ---------- 发布链路 ---------- */

.page-about .about-flow__intro {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
  margin-bottom: clamp(26px, 4vw, 42px);
}

.page-about .about-flow__copy {
  max-width: 700px;
}

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

.page-about .about-flow__scroller {
  overflow-x: auto;
  scrollbar-width: thin;
  border: 1px solid var(--line);
}

.page-about .about-flow__scroller:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-about .about-flow__track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(240px, 1fr);
  scroll-snap-type: x mandatory;
  background: var(--line);
  gap: 1px;
}

.page-about .about-flow__step {
  position: relative;
  background: var(--ink-900);
  padding: 24px 20px 26px;
  scroll-snap-align: start;
  transition: background .2s var(--ease), box-shadow .2s var(--ease);
}

.page-about .about-flow__step:hover {
  background: var(--ink-800);
  box-shadow: inset 0 0 0 2px var(--orange);
}

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

.page-about .about-flow__step h3 {
  font-family: var(--font-sans);
  font-size: 19px;
  font-weight: 700;
  color: var(--white);
  margin: 0 0 10px;
}

.page-about .about-flow__step p {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
}

.page-about .about-flow__arrow {
  display: block;
  width: 26px;
  height: 13px;
  margin-top: 18px;
  color: var(--line);
}

.page-about .about-flow__step:last-child .about-flow__arrow {
  display: none;
}

/* ---------- 团队 ---------- */

.page-about .about-team__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-team__copy {
  max-width: 700px;
}

.page-about .about-team__copy p {
  font-size: 15.5px;
  line-height: 1.8;
  margin: 0 0 14px;
}

.page-about .about-team__link {
  margin-top: 20px;
}

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

.page-about .about-team__card {
  background: var(--ink-900);
  padding: 18px 18px 20px;
  transition: background .2s var(--ease);
}

.page-about .about-team__card:hover {
  background: var(--ink-800);
}

.page-about .about-team__card h3 {
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--white);
  margin: 0 0 8px;
}

.page-about .about-team__card .mono {
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--cyan);
  margin: 0 0 8px;
}

.page-about .about-team__card p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

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

/* ---------- 合作与技术 ---------- */

.page-about .about-eco__cols {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-bottom: 22px;
}

.page-about .about-eco__card {
  background: var(--ink-800);
  border: 0;
  border-radius: 0;
  padding: clamp(20px, 3vw, 30px);
}

.page-about .about-eco__card h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  color: var(--white);
  margin: 0 0 12px;
}

.page-about .about-eco__card p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  margin: 0 0 12px;
}

.page-about .about-eco__meta {
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--cyan);
  margin: 0;
}

.page-about .about-eco__cta {
  font-size: 15px;
  line-height: 1.8;
  max-width: 760px;
}

.page-about .about-inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--orange);
  border-color: var(--orange);
}

/* ---------- 内容标准 ---------- */

.page-about .about-quality__list {
  list-style: none;
  margin: 0 0 clamp(30px, 5vw, 54px);
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-quality__item {
  background: var(--ink-900);
  padding: clamp(20px, 3vw, 28px);
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "num title"
    "body body";
  column-gap: 14px;
  row-gap: 8px;
}

.page-about .about-quality__num {
  grid-area: num;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--orange);
  padding-top: 4px;
}

.page-about .about-quality__item h3 {
  grid-area: title;
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
  margin: 0;
}

.page-about .about-quality__item p {
  grid-area: body;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
  margin: 0;
}

/* ---------- 收尾 ---------- */

.page-about .about-close {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  align-items: center;
}

.page-about .about-close__quote {
  position: relative;
  padding: clamp(24px, 3vw, 34px) clamp(20px, 3vw, 30px);
  background: var(--paper);
  color: var(--ink-900);
  box-shadow: 6px 6px 0 rgba(16, 26, 51, .9);
}

.page-about .about-close__label {
  display: inline-block;
  margin-bottom: 14px;
  padding: 3px 9px;
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--ink-900);
  background: var(--paper-2);
}

.page-about .about-close__quote p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(17px, 2.4vw, 22px);
  line-height: 1.6;
  color: var(--ink-900);
}

.page-about .about-close__actions p {
  font-size: 15.5px;
  line-height: 1.8;
  margin: 0 0 18px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-about .about-team__board {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .page-about .about-quality__item {
    grid-template-columns: 64px 1fr;
    grid-template-areas: "num title" "num body";
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-timeline__track {
    grid-auto-flow: row;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    overflow-x: visible;
  }

  .page-about .about-flow__intro {
    grid-template-columns: 1fr 360px;
    align-items: start;
  }

  .page-about .about-flow__track {
    grid-auto-flow: row;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    overflow-x: visible;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
  }

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

  .page-about .about-close {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }
}
<<<END>>>