.page-about {
  --about-gap: clamp(18px, 3vw, 32px);
  --about-ink-soft: rgba(242, 237, 228, .78);
  --about-ink-faint: rgba(242, 237, 228, .55);
  --about-line-soft: rgba(201, 204, 209, .3);
  --about-ink-soft-dark: rgba(14, 15, 18, .74);
  --about-line-dark: rgba(14, 15, 18, .22);

  background: var(--ink);
  color: var(--cream);
  font-family: var(--font);
  overflow-x: clip;
}

.page-about .wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: calc(var(--header-h) + clamp(20px, 4vw, 44px));
  padding-bottom: clamp(36px, 6vw, 72px);
}

.page-about .about-hero .crumbs {
  margin-bottom: clamp(20px, 3vw, 32px);
  font-size: 13px;
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .about-hero-copy .eyebrow {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--amber);
  margin: 0 0 12px;
}

.page-about .about-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(30px, 6.4vw, 54px);
  line-height: 1.06;
  letter-spacing: -.02em;
  font-weight: 900;
  color: var(--cream);
}

.page-about .about-hero h1 em {
  display: block;
  font-style: normal;
  color: var(--red);
  text-shadow: 0 3px 0 rgba(0, 0, 0, .5);
}

.page-about .about-hero .lede {
  max-width: 34em;
  margin: 0;
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: clamp(22px, 3vw, 30px);
  padding-top: 16px;
  border-top: 2px solid var(--about-line-soft);
}

.page-about .fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .fact-num {
  font-family: var(--mono);
  font-size: clamp(24px, 4.6vw, 32px);
  line-height: 1;
  color: var(--neon);
  letter-spacing: -.02em;
}

.page-about .fact-label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--about-ink-faint);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 30px);
}

.page-about .about-hero-media {
  margin: 0;
  background: var(--rock);
  border: 2px solid var(--line);
  box-shadow: var(--hard);
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.page-about .about-hero-media .media-cap {
  padding: 10px 12px;
  border-top: 1px dashed var(--about-line-soft);
  font-size: 12px;
  line-height: 1.6;
  color: var(--about-ink-faint);
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    align-items: end;
  }

  .page-about .about-hero-media {
    transform: translateY(10px);
  }
}

/* ---------- 章节壳 ---------- */
.page-about .stage {
  position: relative;
  padding: clamp(40px, 7vw, 84px) 0;
  overflow: clip;
}

.page-about .stage.chapter {
  padding: clamp(40px, 7vw, 84px) 0;
}

.page-about .stage--light {
  background: var(--cream);
  color: var(--ink);
}

.page-about .stage--dark {
  background: var(--rock);
  color: var(--cream);
  border-top: 2px solid var(--about-line-soft);
}

.page-about .stage--ink {
  background-color: var(--ink);
  background-image: radial-gradient(rgba(242, 237, 228, .07) 1px, transparent 1px);
  background-size: 4px 4px;
  color: var(--cream);
}

.page-about .stage-head {
  display: flex;
  align-items: flex-end;
  gap: clamp(12px, 2.4vw, 22px);
  padding-bottom: 12px;
  margin-bottom: clamp(22px, 4vw, 36px);
  border-bottom: 1px dashed currentColor;
}

.page-about .stage-num {
  font-family: var(--mono);
  font-size: clamp(38px, 8vw, 76px);
  line-height: .78;
  letter-spacing: -.04em;
  color: var(--red);
}

.page-about .stage-title {
  margin: 0;
  font-size: clamp(21px, 4vw, 38px);
  line-height: 1.15;
  letter-spacing: -.02em;
  font-weight: 900;
}

.page-about .stage-lede {
  max-width: 36em;
  margin: 0 0 clamp(24px, 4vw, 40px);
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.8;
  color: var(--about-ink-soft);
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-origin .prose p {
  margin: 0 0 16px;
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.8;
  color: var(--about-ink-soft-dark);
}

.page-about .about-quote {
  margin: 22px 0 0;
  padding: 6px 0 6px 16px;
  border-left: 4px solid var(--red);
  font-weight: 800;
  font-size: clamp(16px, 2.6vw, 19px) !important;
  line-height: 1.6 !important;
  color: var(--ink) !important;
}

.page-about .origin-side {
  border: 2px solid var(--ink);
  box-shadow: var(--hard-sm);
  padding: clamp(16px, 2.5vw, 24px);
  background: transparent;
}

.page-about .origin-side-title {
  margin: 0 0 14px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.01em;
}

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

.page-about .origin-list li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 10px 0;
  border-top: 1px dashed var(--about-line-dark);
  font-size: 14px;
  line-height: 1.65;
  color: var(--about-ink-soft-dark);
}

.page-about .origin-step {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--red);
}

.page-about .origin-foot {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 2px solid var(--ink);
  font-size: 13px;
  line-height: 1.65;
  color: var(--moss);
}

@media (min-width: 860px) {
  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
    align-items: start;
  }
}

/* ---------- 02 时间线 ---------- */
.page-about .tl {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 14px;
  bottom: 46px;
  width: 2px;
  background: var(--about-line-soft);
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 clamp(28px, 4vw, 44px) 30px;
}

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

.page-about .tl-dot {
  position: absolute;
  left: 0;
  top: 14px;
  width: 14px;
  height: 14px;
  box-sizing: border-box;
  background: var(--red);
  border: 2px solid var(--line);
}

.page-about .tl-year {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 12px;
}

.page-about .tl-year-num {
  font-family: var(--mono);
  font-size: clamp(46px, 11vw, 84px);
  line-height: .82;
  letter-spacing: -.04em;
  color: var(--cream);
  transition: color 160ms var(--ease), transform 160ms var(--ease);
}

.page-about .tl-year-key {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--amber);
  opacity: .8;
  transition: opacity 160ms var(--ease), transform 160ms var(--ease);
}

.page-about .tl-body {
  border: 2px solid var(--about-line-soft);
  box-shadow: var(--hard-sm);
  background: var(--rock);
  padding: clamp(16px, 2.6vw, 22px);
}

.page-about .tl-title {
  margin: 12px 0 10px;
  font-size: clamp(19px, 3vw, 25px);
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--cream);
}

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

.page-about .tl-more {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--about-line-soft);
}

.page-about .tl-more summary {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  cursor: pointer;
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--amber);
}

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

.page-about .tl-more summary::before {
  content: "+";
  font-family: var(--mono);
  font-size: 16px;
  line-height: 1;
}

.page-about .tl-more[open] summary::before {
  content: "–";
}

.page-about .tl-more ul {
  margin: 12px 0 0;
  padding-left: 18px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--about-ink-soft);
}

.page-about .tl-more li + li {
  margin-top: 4px;
}

@media (hover: hover) {
  .page-about .tl-item:hover .tl-year-num,
  .page-about .tl-item:focus-within .tl-year-num {
    color: var(--red);
    transform: translateY(-2px);
  }

  .page-about .tl-year-key {
    opacity: 0;
    transform: translateX(-6px);
  }

  .page-about .tl-item:hover .tl-year-key,
  .page-about .tl-item:focus-within .tl-year-key {
    opacity: 1;
    transform: none;
  }
}

@media (min-width: 860px) {
  .page-about .tl::before {
    left: 199px;
    top: 12px;
    bottom: 60px;
  }

  .page-about .tl-item {
    display: grid;
    grid-template-columns: 200px minmax(0, 1fr);
    gap: clamp(26px, 3.4vw, 44px);
    padding-left: 0;
  }

  .page-about .tl-dot {
    left: 193px;
    top: 16px;
  }

  .page-about .tl-year {
    margin-bottom: 0;
    align-items: flex-start;
    padding-top: 2px;
  }

  .page-about .tl-year-num {
    writing-mode: horizontal-tb;
  }
}

/* ---------- 03 团队 ---------- */
.page-about .team-layout {
  display: grid;
  gap: var(--about-gap);
}

.page-about .team-lede {
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 38em;
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.8;
  color: var(--about-ink-soft-dark);
}

.page-about .team-grid {
  display: grid;
  gap: clamp(14px, 2.2vw, 20px);
}

.page-about .team-card {
  border: 2px solid var(--ink);
  box-shadow: var(--hard-sm);
  padding: clamp(16px, 2.6vw, 22px);
}

.page-about .team-count {
  display: block;
  font-family: var(--mono);
  font-size: 34px;
  line-height: 1;
  color: var(--red);
  letter-spacing: -.03em;
}

.page-about .team-card h3 {
  margin: 8px 0 8px;
  font-size: 17px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .team-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--about-ink-soft-dark);
}

.page-about .team-media {
  margin: 0;
  border: 2px solid var(--ink);
  box-shadow: var(--hard-sm);
  background: var(--rock);
}

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

.page-about .team-media .media-cap {
  padding: 10px 12px;
  border-top: 1px dashed var(--about-line-dark);
  font-size: 12px;
  line-height: 1.6;
  color: var(--moss);
}

@media (min-width: 720px) {
  .page-about .team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-about .team-layout {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
  }
}

/* ---------- 04 版本 ---------- */
.page-about .stage--versions {
  border-top: 1px dashed var(--about-line-dark);
}

.page-about .versions-layout {
  display: grid;
  gap: clamp(22px, 3.4vw, 44px);
}

.page-about .versions-copy p {
  margin: 0 0 16px;
  max-width: 34em;
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.8;
  color: var(--about-ink-soft-dark);
}

.page-about .ver-list {
  display: flex;
  flex-direction: column;
}

.page-about .ver-item {
  border-top: 2px solid var(--ink);
  padding: 14px 0;
}

.page-about .ver-item:last-child {
  border-bottom: 2px solid var(--ink);
}

.page-about .ver-item summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  list-style: none;
  cursor: pointer;
  font-size: clamp(15px, 2.4vw, 17px);
  font-weight: 800;
  line-height: 1.5;
  color: var(--ink);
}

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

.page-about .ver-item summary::after {
  content: "＋";
  font-family: var(--mono);
  color: var(--red);
  flex: none;
}

.page-about .ver-item[open] summary::after {
  content: "－";
}

.page-about .ver-tag {
  flex: none;
  order: 2;
  margin-left: auto;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--clay);
  border: 1px solid var(--clay);
  padding: 1px 6px;
  font-weight: 400;
}

.page-about .ver-item p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-ink-soft-dark);
}

@media (min-width: 900px) {
  .page-about .versions-layout {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    align-items: start;
  }
}

/* ---------- 05 合作 ---------- */
.page-about .partner-layout {
  display: grid;
  gap: var(--about-gap);
}

.page-about .partner-media {
  margin: 0;
  border: 2px solid var(--line);
  box-shadow: var(--hard);
  background: var(--ink);
}

.page-about .partner-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-about .partner-media .media-cap {
  padding: 10px 12px;
  border-top: 1px dashed var(--about-line-soft);
  font-size: 12px;
  line-height: 1.6;
  color: var(--about-ink-faint);
}

.page-about .partner-stat {
  margin: 0 0 6px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-ink-soft);
}

.page-about .partner-stat span {
  font-family: var(--mono);
  font-size: clamp(34px, 6vw, 48px);
  line-height: 1;
  color: var(--amber);
  margin-right: 6px;
  letter-spacing: -.03em;
}

.page-about .partner-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.page-about .partner-list li {
  border-left: 4px solid var(--red);
  padding: 2px 0 2px 14px;
  margin-bottom: 16px;
}

.page-about .partner-list h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 800;
  color: var(--cream);
}

.page-about .partner-list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-ink-soft);
}

.page-about .partner-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

@media (min-width: 900px) {
  .page-about .partner-layout {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    align-items: start;
  }
}

/* ---------- 06 下一步 ---------- */
.page-about .stage--next {
  background: var(--ink);
  color: var(--cream);
  padding-bottom: clamp(52px, 8vw, 96px);
}

.page-about .next-band {
  height: 14px;
  margin-bottom: clamp(28px, 5vw, 52px);
  background: repeating-linear-gradient(135deg, var(--red) 0 14px, var(--ink) 14px 28px);
  border-top: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
}

.page-about .next-grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
}

.page-about .next-lede {
  max-width: 36em;
  margin: 0;
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .next-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.page-about .next-links {
  flex-basis: 100%;
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--about-ink-faint);
}

.page-about .next-links a {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .next-links a:hover {
  color: var(--amber);
}

@media (min-width: 900px) {
  .page-about .next-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
    align-items: start;
  }

  .page-about .next-actions {
    justify-content: flex-start;
  }
}
<<<END>>>