.page-about {
  position: relative;
  overflow-x: clip;
  color: var(--paper-white);
  background-color: var(--curtain);
  background-image:
    linear-gradient(to right, var(--blueprint) 1px, transparent 1px),
    linear-gradient(to bottom, var(--blueprint) 1px, transparent 1px);
  background-size: 24px 24px;
  padding-bottom: 72px;
}

.page-about .breadcrumb {
  padding-top: 20px;
  font-size: 13px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -20%;
  width: 90%;
  height: 190%;
  background: linear-gradient(104deg, transparent 34%, rgba(216, 169, 75, 0.16) 52%, rgba(163, 19, 47, 0.24) 66%, transparent 84%);
  transform: skewX(-12deg);
  pointer-events: none;
  z-index: -1;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -160px;
  left: -8%;
  width: 62%;
  height: 460px;
  background: radial-gradient(ellipse at 30% 40%, rgba(242, 209, 139, 0.16), transparent 68%);
  pointer-events: none;
  z-index: -1;
}

.page-about .about-hero__inner {
  display: grid;
  gap: 30px;
  padding: 26px 0 46px;
}

.page-about .about-hero__title {
  margin: 10px 0 18px;
  text-shadow: 0 0 30px rgba(216, 169, 75, 0.26);
}

.page-about .about-hero__lede {
  max-width: 60ch;
  margin: 0;
}

.page-about .about-hero__facts {
  display: grid;
  gap: 4px;
  align-content: start;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.page-about .fact {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(216, 169, 75, 0.22);
}

.page-about .fact__k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cool);
}

.page-about .fact__v {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--gold-hi);
}

/* ---------- 画布与章节 ---------- */
.page-about .canvas {
  padding-top: 6px;
}

.page-about .chapter {
  position: relative;
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 10px;
  padding: 40px 0 12px;
}

.page-about .chapter::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--line) 4%, var(--line) 94%, transparent);
}

.page-about .chapter__axis {
  position: relative;
}

.page-about .chapter__axis::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 6px;
  width: 7px;
  height: 7px;
  background: var(--curtain);
  border: 1px solid var(--gold);
  transform: rotate(45deg);
}

.page-about .chapter__body {
  display: grid;
  gap: 24px;
  min-width: 0;
}

.page-about .chapter__code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--neon);
  margin: 0 0 8px;
}

.page-about .chapter__head h2 {
  margin: 0 0 14px;
}

.page-about .chapter__lede {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(246, 239, 230, 0.82);
}

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

.page-about .figure__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 3px;
}

.page-about .figure__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--cool);
}

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

/* ---------- 01 班底 ---------- */
.page-about .crew-layout {
  display: grid;
  gap: 28px;
}

.page-about .crew {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 26px;
}

.page-about .crew-card {
  position: relative;
  isolation: isolate;
  margin-right: 14px;
  padding: 20px 20px 22px;
  background: var(--paper);
  color: var(--stage);
  border: 1px solid rgba(18, 10, 16, 0.16);
  border-radius: 3px;
  transition: transform var(--dur-hover) var(--ease);
}

.page-about .crew-card::before,
.page-about .crew-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid var(--line);
  border-radius: 3px;
  z-index: -1;
  transition: transform var(--dur-hover) var(--ease);
}

.page-about .crew-card::before {
  background: rgba(239, 227, 210, 0.26);
  transform: translate(6px, 6px);
}

.page-about .crew-card::after {
  background: rgba(239, 227, 210, 0.1);
  transform: translate(12px, 12px);
}

.page-about .crew-card:hover {
  transform: translateY(-2px);
}

.page-about .crew-card:hover::before {
  transform: translate(8px, 8px);
}

.page-about .crew-card:hover::after {
  transform: translate(14px, 14px);
}

.page-about .crew-card__head {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .crew-card__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--curtain-red);
  letter-spacing: 0.06em;
}

.page-about .crew-card__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .crew-card__desc {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(18, 10, 16, 0.8);
}

.page-about .crew-card__gain {
  margin: 12px 0 0;
  padding-left: 10px;
  border-left: 2px solid var(--curtain-red);
  font-size: 14px;
  line-height: 1.65;
  color: rgba(18, 10, 16, 0.92);
}

.page-about .crew-figure {
  margin: 0;
  align-self: start;
}

/* ---------- 02 工序 ---------- */
.page-about .flow {
  position: relative;
}

.page-about .flow__path {
  display: none;
}

.page-about .flow__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
  position: relative;
  z-index: 1;
}

.page-about .step {
  position: relative;
  padding-left: 16px;
  border-left: 1px solid var(--line);
  transition: border-color var(--dur-hover) var(--ease);
}

.page-about .step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--gold-hi);
  background: var(--indigo);
  border: 1px solid var(--line-strong);
}

.page-about .step__name {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  color: var(--paper-white);
}

.page-about .step__out {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--neon);
}

.page-about .step__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(246, 239, 230, 0.66);
  transition: color var(--dur-hover) var(--ease);
}

.page-about .step:hover,
.page-about .step:focus-within {
  border-left-color: var(--gold);
}

.page-about .step:hover .step__note,
.page-about .step:focus-within .step__note {
  color: var(--paper-white);
}

.page-about .process-figure {
  margin: 30px 0 0;
  max-width: 520px;
}

/* ---------- 03 版本 ---------- */
.page-about .chapter--versions {
  position: relative;
}

.page-about .chapter--versions::after {
  content: "";
  position: absolute;
  inset: 0 -6px;
  background-image:
    linear-gradient(to right, rgba(142, 147, 168, 0.1) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(142, 147, 168, 0.1) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
  z-index: 0;
}

.page-about .chapter--versions > * {
  position: relative;
  z-index: 1;
}

.page-about .ver-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.page-about .ver-tab {
  display: inline-block;
  padding: 7px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--gold-hi);
  text-decoration: none;
  transition: background var(--dur-hover) var(--ease), border-color var(--dur-hover) var(--ease);
}

.page-about .ver-tab:hover {
  background: rgba(216, 169, 75, 0.16);
  border-color: var(--line-strong);
}

.page-about .versions-layout {
  display: grid;
  gap: 26px;
}

.page-about .versions-figure {
  margin: 0;
}

.page-about .vers {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .ver {
  scroll-margin-top: 96px;
  padding: 18px 18px 20px;
  background: rgba(27, 16, 48, 0.6);
  border-left: 2px solid rgba(216, 169, 75, 0.35);
  transition: background var(--dur-hover) var(--ease), border-color var(--dur-hover) var(--ease);
}

.page-about .ver:hover {
  border-left-color: var(--gold);
}

.page-about .ver:target {
  background: rgba(53, 224, 208, 0.09);
  border-left-color: var(--neon);
}

.page-about .ver__stage {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--neon);
}

.page-about .ver__name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  color: var(--paper-white);
}

.page-about .ver__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(246, 239, 230, 0.8);
}

.page-about .ver__gain {
  margin: 10px 0 0;
  padding-top: 8px;
  border-top: 1px solid rgba(216, 169, 75, 0.22);
  font-size: 14px;
  line-height: 1.6;
  color: var(--gold-hi);
}

/* ---------- 04 合作 ---------- */
.page-about .eco__stat {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.6;
  color: rgba(246, 239, 230, 0.72);
}

.page-about .eco__stat-num {
  display: inline-block;
  margin-right: 8px;
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--gold);
  text-shadow: 0 0 24px rgba(216, 169, 75, 0.35);
}

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

.page-about .eco__item {
  padding: 20px 18px 22px;
  background: var(--curtain);
}

.page-about .eco__item:nth-child(2) {
  background: var(--indigo);
}

.page-about .eco__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cool);
  margin-bottom: 8px;
}

.page-about .eco__name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  color: var(--paper-white);
}

.page-about .eco__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(246, 239, 230, 0.78);
}

.page-about .eco__gain {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(53, 224, 208, 0.86);
}

.page-about .eco__foot {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(246, 239, 230, 0.7);
}

.page-about .eco__link,
.page-about .together__link {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 208, 0.5);
  transition: border-color var(--dur-hover) var(--ease), color var(--dur-hover) var(--ease);
}

.page-about .eco__link:hover,
.page-about .together__link:hover {
  color: var(--gold-hi);
  border-bottom-color: var(--gold-hi);
}

/* ---------- 05 一起 ---------- */
.page-about .chapter--end {
  padding-bottom: 40px;
}

.page-about .together {
  display: grid;
  gap: 26px;
}

.page-about .together__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .together__list li {
  padding-left: 14px;
  border-left: 1px solid var(--line);
}

.page-about .together__k {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-about .together__list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(246, 239, 230, 0.78);
}

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

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: end;
    gap: 56px;
    padding: 40px 0 68px;
  }

  .page-about .about-hero__facts {
    padding-top: 18px;
  }

  .page-about .chapter {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 22px;
    padding: 64px 0 20px;
  }

  .page-about .chapter::before {
    left: 11px;
  }

  .page-about .chapter__axis::before {
    left: 7px;
  }

  .page-about .chapter__body {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    column-gap: 52px;
    align-items: start;
  }

  .page-about .chapter__body--stack {
    grid-template-columns: minmax(0, 1fr);
    row-gap: 30px;
  }

  .page-about .chapter__body--stack .chapter__head {
    max-width: 54ch;
  }

  .page-about .crew-layout {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .crew-figure {
    position: sticky;
    top: 104px;
  }

  .page-about .flow {
    padding-top: 10px;
  }

  .page-about .flow__path {
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.7;
    pointer-events: none;
    z-index: 0;
  }

  .page-about .flow__steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .step {
    padding-left: 0;
    padding-top: 16px;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .page-about .step:hover,
  .page-about .step:focus-within {
    border-top-color: var(--gold);
  }

  .page-about .process-figure {
    margin-top: 44px;
    max-width: 560px;
    margin-left: auto;
  }

  .page-about .versions-layout {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
    gap: 48px;
    align-items: start;
  }

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

  .page-about .together {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    column-gap: 56px;
    padding-bottom: 64px;
  }

  .page-about .together__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .crew-card,
  .page-about .crew-card::before,
  .page-about .crew-card::after,
  .page-about .step__note,
  .page-about .ver,
  .page-about .ver-tab {
    transition: none;
  }

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