.page-about {
  --about-block: clamp(48px, 8vw, 104px);
  --about-radius-sm: clamp(14px, 2vw, 20px);
  --about-radius-lg: clamp(16px, 2.6vw, 28px);
  --about-text: rgba(233, 238, 247, .78);
  --about-text-soft: rgba(233, 238, 247, .62);

  display: block;
  background: var(--ink);
  color: var(--white);
  overflow-x: hidden;
}

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

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: var(--shell-w);
  margin: 0 auto;
  padding: clamp(18px, 3vw, 30px) var(--gutter) 0;
  font-size: 13px;
  color: var(--mist);
}

.page-about .about-crumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-crumb a:hover {
  color: var(--white);
  border-bottom-color: var(--red);
}

.page-about .about-crumb-sep {
  color: rgba(138, 152, 174, .5);
}

/* ---------- 通用章节元素 ---------- */
.page-about .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-about .eyebrow::before {
  content: "";
  display: inline-block;
  width: 20px;
  height: 3px;
  margin-right: 9px;
  vertical-align: middle;
  border-radius: 2px;
  background: var(--red);
}

.page-about .section-title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(26px, 4.6vw, 44px);
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--white);
}

.page-about .lede {
  margin: clamp(12px, 2vw, 18px) 0 0;
  max-width: 64ch;
  font-size: clamp(14.5px, 1.5vw, 16.5px);
  line-height: 1.75;
  color: var(--about-text);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  max-width: var(--shell-w);
  margin: 0 auto;
  padding: clamp(24px, 4vw, 46px) var(--gutter) clamp(40px, 7vw, 96px);
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}

.page-about .about-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(34px, 8vw, 76px);
  line-height: 1.03;
  letter-spacing: -0.03em;
  color: var(--white);
}

.page-about .about-h1-num {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: -0.05em;
  color: var(--red);
  font-size: 1.08em;
}

.page-about .about-hero-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(10px, 1.6vw, 16px);
}

.page-about .about-hero-stats li {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--about-radius-sm);
  padding: clamp(14px, 2.4vw, 22px);
}

.page-about .about-stat-value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.6vw, 32px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--white);
}

.page-about .about-stat-label {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--mist);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  width: 100%;
  background: linear-gradient(180deg, var(--night) 0%, var(--ink) 34%, #17283f 74%, var(--panel) 100%);
  padding: clamp(44px, 7vw, 92px) 0 clamp(36px, 5vw, 64px);
}

.page-about .about-tl-head {
  max-width: var(--shell-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.page-about .about-tl-media {
  max-width: var(--shell-w);
  margin: clamp(28px, 4vw, 48px) auto 0;
  padding: 0 var(--gutter);
}

.page-about .about-tl-media img {
  display: block;
  width: 100%;
  max-width: 960px;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--about-radius-lg);
}

.page-about .media-caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--about-text-soft);
}

.page-about .about-track {
  list-style: none;
  margin: clamp(30px, 5vw, 56px) 0 0;
  padding: 0 var(--gutter) 26px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(260px, 82vw);
  align-items: start;
  gap: clamp(14px, 2.4vw, 26px);
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
}

.page-about .about-track::-webkit-scrollbar {
  height: 6px;
}

.page-about .about-track::-webkit-scrollbar-track {
  background: rgba(233, 238, 247, .07);
  border-radius: 99px;
}

.page-about .about-track::-webkit-scrollbar-thumb {
  background: rgba(233, 238, 247, .24);
  border-radius: 99px;
}

.page-about .about-stage {
  scroll-snap-align: start;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 2.8vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--about-radius-lg);
  transition: transform .28s var(--ease), border-color .28s var(--ease);
}

.page-about .about-stage:nth-child(1) { background: #050A12; }
.page-about .about-stage:nth-child(2) { background: #0E2038; }
.page-about .about-stage:nth-child(3) { background: #16273F; }
.page-about .about-stage:nth-child(4) {
  background: var(--panel);
  border-top: 3px solid var(--red);
}

.page-about .about-stage-num {
  font-family: var(--font-mono);
  font-size: clamp(36px, 6vw, 54px);
  font-weight: 700;
  line-height: .9;
  letter-spacing: -0.06em;
  color: rgba(233, 238, 247, .16);
}

.page-about .about-stage-year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mist);
}

.page-about .about-stage-title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(19px, 2.4vw, 25px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-stage-body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--about-text);
}

.page-about .about-stage-body p + p {
  margin-top: 10px;
}

.page-about .about-stage-body .about-stage-more {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--about-text-soft);
}

.page-about .about-note {
  margin: 4px 0 0;
  font-family: var(--font-hand);
  font-size: 15px;
  color: var(--yellow);
  transform: rotate(-2deg);
  transform-origin: left center;
}

@media (hover: hover) and (min-width: 760px) {
  .page-about .about-stage:hover {
    transform: translateY(-6px);
    border-color: rgba(233, 238, 247, .3);
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  max-width: var(--shell-w);
  margin: 0 auto;
  padding: var(--about-block) var(--gutter);
}

.page-about .about-team-grid {
  margin-top: clamp(28px, 4vw, 48px);
  display: grid;
  gap: clamp(16px, 2.2vw, 24px);
}

.page-about .about-role {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 2.8vw, 30px);
  border-radius: var(--about-radius-lg);
}

.page-about .about-role--a { background: #16273F; }
.page-about .about-role--b { background: var(--panel); }
.page-about .about-role--c { background: #0E2038; }

.page-about .about-role-count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--white);
}

.page-about .about-role-name {
  margin: 0;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-role p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--about-text);
}

.page-about .about-team-media {
  margin: 0;
}

.page-about .about-team-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--about-radius-lg);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  width: 100%;
  background: var(--night);
  padding: clamp(44px, 7vw, 88px) 0;
}

.page-about .about-partners-inner {
  max-width: var(--shell-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.page-about .about-partner-list {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(14px, 2vw, 22px);
}

.page-about .about-partner-item {
  padding: clamp(18px, 2.4vw, 26px);
  background: rgba(27, 44, 72, .58);
  border-left: 3px solid var(--blue);
  border-radius: 0 var(--about-radius-sm) var(--about-radius-sm) 0;
}

.page-about .about-partner-item:nth-child(2) { border-left-color: var(--green); }
.page-about .about-partner-item:nth-child(3) { border-left-color: var(--yellow); }

.page-about .about-partner-item h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-partner-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--about-text);
}

/* ---------- 长期跟队 ---------- */
.page-about .about-record {
  max-width: var(--shell-w);
  margin: 0 auto;
  padding: var(--about-block) var(--gutter);
}

.page-about .about-record-grid {
  margin-top: clamp(28px, 4vw, 48px);
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .about-record-media {
  margin: 0;
}

.page-about .about-record-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 520px;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--about-radius-lg);
}

.page-about .about-record-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-text);
}

.page-about .about-record-facts {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0;
  padding: 0;
}

.page-about .about-record-facts li {
  display: flex;
  align-items: baseline;
  gap: clamp(12px, 2vw, 20px);
  padding: clamp(12px, 1.8vw, 18px) 0;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--about-text);
}

.page-about .about-record-facts li:first-child {
  border-top: 1px solid var(--line);
}

.page-about .about-fact-num {
  flex: none;
  min-width: 3.6ch;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.2vw, 30px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--white);
}

/* ---------- 结尾行动带 ---------- */
.page-about .about-next {
  max-width: var(--shell-w);
  margin: 0 auto;
  padding: clamp(32px, 5vw, 56px) var(--gutter) clamp(48px, 7vw, 88px);
  display: grid;
  gap: clamp(18px, 3vw, 28px);
  align-items: center;
  border-top: 1px solid var(--line);
}

.page-about .about-next-lead {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--white);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-about .about-stage:nth-child(even) {
    margin-top: clamp(20px, 3vw, 44px);
  }

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

@media (min-width: 820px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: clamp(16px, 2.2vw, 26px);
    row-gap: clamp(20px, 3vw, 40px);
  }

  .page-about .about-role--a {
    grid-column: 1 / span 6;
    grid-row: 1;
  }

  .page-about .about-team-media {
    grid-column: 8 / span 5;
    grid-row: 1;
    margin-top: clamp(28px, 5vw, 72px);
  }

  .page-about .about-role--b {
    grid-column: 2 / span 4;
    grid-row: 2;
  }

  .page-about .about-role--c {
    grid-column: 7 / span 5;
    grid-row: 2;
    margin-top: clamp(32px, 5vw, 64px);
  }

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

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-about .about-record-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: center;
    gap: clamp(32px, 5vw, 72px);
  }
}

@media (min-width: 1000px) {
  .page-about .about-track {
    grid-auto-columns: minmax(300px, 27%);
    padding-inline: max(var(--gutter), calc((100vw - var(--shell-w)) / 2));
  }
}
<<<END>>>