.page-about {
  --about-toc-w: 176px;
  background: var(--cream);
  color: var(--graphite);
}

.page-about .inline-link {
  color: var(--whistle-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(194, 74, 18, .38);
  padding-bottom: 1px;
  transition: border-color .2s ease, color .2s ease;
}

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

.page-about .inline-link--light {
  color: var(--neon);
  border-bottom-color: rgba(233, 255, 87, .45);
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 5vw, 46px) 0 clamp(26px, 4vw, 52px);
  background:
    radial-gradient(120% 85% at 92% -10%, rgba(240, 96, 28, .12), transparent 62%),
    radial-gradient(90% 70% at 0% 100%, rgba(124, 154, 110, .12), transparent 60%),
    var(--cream);
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
}

.page-about .about-hero__lead .breadcrumb {
  margin-bottom: 14px;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(38px, 8.4vw, 88px);
  line-height: 1.03;
  letter-spacing: -0.012em;
  color: var(--indigo);
  margin: 10px 0 0;
}

.page-about .about-hero h1 em {
  font-style: normal;
  color: var(--whistle);
  box-shadow: inset 0 -0.12em 0 rgba(240, 96, 28, .2);
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 44em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .shot {
  margin: 0;
  min-width: 0;
}

.page-about .shot img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--r-md);
  background: var(--clay);
}

.page-about .shot figcaption {
  margin-top: 9px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  letter-spacing: .03em;
  color: var(--stone);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-stats__item {
  background: var(--paper);
  padding: 14px 15px 16px;
}

.page-about .about-stats__label {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--stone);
}

.page-about .about-stats__num {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--indigo);
  font-variant-numeric: tabular-nums;
}

/* ---------- 目录刻度 + 内容流 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 3vw, 38px);
  padding-bottom: clamp(40px, 6vw, 88px);
}

.page-about .about-toc__title {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--stone);
}

.page-about .about-toc__list {
  display: flex;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-toc__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: transparent;
  font-size: 13px;
  line-height: 1.4;
  white-space: nowrap;
  text-decoration: none;
  color: var(--stone);
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--whistle-deep);
  border-color: var(--clay);
  background: var(--paper);
}

.page-about .about-toc__idx {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .1em;
  color: var(--whistle);
}

/* ---------- 章节 ---------- */
.page-about .flow-section {
  position: relative;
  padding: clamp(26px, 4vw, 46px) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 20px;
}

.page-about .flow-section::after {
  content: attr(data-num);
  position: absolute;
  top: 6px;
  right: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(54px, 9vw, 104px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: rgba(20, 32, 58, .05);
  pointer-events: none;
  user-select: none;
}

.page-about .flow-section__title {
  position: relative;
  z-index: 1;
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(25px, 4.2vw, 38px);
  line-height: 1.15;
  letter-spacing: -0.005em;
  color: var(--indigo);
}

.page-about .flow-section__lede {
  position: relative;
  z-index: 1;
  margin: 0 0 20px;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .prose p {
  margin: 0 0 14px;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--graphite);
}

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

/* ---------- 起点 ---------- */
.page-about .origin {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 30px);
}

.page-about .origin__note {
  align-self: start;
  padding: 18px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  border-left: 4px solid var(--field);
  background: var(--paper);
  box-shadow: var(--shadow-card);
}

.page-about .origin__note-label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--field);
}

.page-about .origin__note-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--graphite);
}

/* ---------- 团队 ---------- */
.page-about .crew-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .crew {
  --crew-accent: var(--field);
  background: var(--paper);
  border: 1px solid var(--line);
  border-top: 4px solid var(--crew-accent);
  border-radius: var(--r-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.page-about .crew--entry { --crew-accent: var(--moss); }
.page-about .crew--proof { --crew-accent: var(--field); }
.page-about .crew--tech  { --crew-accent: var(--clay); }

.page-about .crew__head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 15px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .crew__head:hover .crew__role,
.page-about .crew__head:focus-visible .crew__role {
  color: var(--whistle-deep);
}

.page-about .crew__label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--crew-accent);
  border: 1px solid currentColor;
  border-radius: var(--r-pill);
  padding: 2px 7px;
  line-height: 1.3;
}

.page-about .crew__role {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--indigo);
  transition: color .2s ease;
}

.page-about .crew__num {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 21px;
  font-weight: 600;
  line-height: 1;
  color: var(--crew-accent);
  font-variant-numeric: tabular-nums;
}

.page-about .crew__unit {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  margin-left: 2px;
}

.page-about .crew__body {
  padding: 0 15px 16px;
}

.page-about .crew__body > p {
  margin: 0 0 12px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .crew__list {
  list-style: none;
  margin: 0;
  padding: 12px 0 0;
  display: grid;
  gap: 8px;
  border-top: 1px dashed var(--line);
}

.page-about .crew__list li {
  position: relative;
  padding-left: 17px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--graphite);
}

.page-about .crew__list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: .58em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--crew-accent);
}

.page-about .shot--strip {
  margin-top: clamp(16px, 3vw, 26px);
}

.page-about .shot--strip img {
  aspect-ratio: 16 / 9;
}

/* ---------- 时间轴 ---------- */
.page-about .tl {
  list-style: none;
  margin: 10px 0 0;
  padding: 0 0 0 30px;
  position: relative;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--whistle) 0%, var(--moss) 45%, var(--line) 100%);
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 clamp(16px, 2.4vw, 24px);
}

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

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 5px;
  width: 14px;
  height: 14px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--cream);
  border: 3px solid var(--whistle);
  transition: background .2s ease, box-shadow .2s ease;
}

.page-about .tl__item:hover::before {
  background: var(--whistle);
  box-shadow: 0 0 0 4px rgba(240, 96, 28, .16);
}

.page-about .tl__ver {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--whistle-deep);
}

.page-about .tl__title {
  margin: 4px 0 5px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.5vw, 24px);
  line-height: 1.3;
  color: var(--indigo);
}

.page-about .tl__desc {
  margin: 0;
  max-width: 40em;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ---------- 复核四步 ---------- */
.page-about .check-list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-about .check-item {
  display: flex;
  gap: 12px;
  padding: 14px 15px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
}

.page-about .check-item__idx {
  flex: none;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--whistle);
}

.page-about .check-item h3 {
  margin: 0 0 5px;
  font-size: 15px;
  font-weight: 700;
  color: var(--indigo);
}

.page-about .check-item p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .review-foot {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 深色合作带 ---------- */
.page-about .flow-section--dark {
  margin: clamp(16px, 3vw, 28px) 0;
  padding: clamp(22px, 3.6vw, 40px);
  background:
    linear-gradient(160deg, rgba(240, 96, 28, .16), transparent 55%),
    var(--indigo);
  border-top: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .flow-section--dark::after {
  color: rgba(245, 239, 227, .08);
}

.page-about .flow-section--dark .flow-section__title {
  color: var(--cream);
}

.page-about .flow-section--dark .flow-section__lede {
  color: var(--cream-soft);
}

.page-about .partners__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(245, 239, 227, .16);
  border-radius: var(--r-md);
  overflow: hidden;
  margin-bottom: 20px;
}

.page-about .partners__fact {
  padding: 14px 15px;
  background: var(--indigo-mid);
}

.page-about .partners__fact strong {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(21px, 3vw, 26px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.page-about .partners__fact span {
  display: block;
  margin-top: 5px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--cream-soft);
}

.page-about .partners__copy {
  margin: 0 0 12px;
  max-width: 42em;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--cream-soft);
}

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

.page-about .shot--dark img {
  opacity: .92;
}

.page-about .shot--dark figcaption {
  color: rgba(245, 239, 227, .55);
}

/* ---------- 三条承诺 ---------- */
.page-about .promise {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
}

.page-about .promise__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.page-about .promise__item:first-child {
  border-top: 0;
  padding-top: 6px;
}

.page-about .promise__idx {
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--whistle);
}

.page-about .promise__text {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.8vw, 27px);
  line-height: 1.35;
  color: var(--indigo);
}

.page-about .promise__text small {
  display: block;
  margin-top: 7px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-next {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 780px) {
  .page-about .origin {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: start;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.22fr) minmax(0, .78fr);
    align-items: end;
    column-gap: clamp(24px, 4vw, 52px);
  }

  .page-about .about-hero__figure {
    align-self: end;
  }

  .page-about .about-stats {
    grid-column: 1 / -1;
  }
}

@media (min-width: 940px) {
  .page-about .about-body {
    grid-template-columns: var(--about-toc-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: 26px;
  }

  .page-about .about-toc__list {
    flex-direction: column;
    gap: 2px;
    padding: 0;
    overflow: visible;
    border-left: 2px solid var(--line);
  }

  .page-about .about-toc__link {
    position: relative;
    border: 0;
    border-radius: 0;
    padding: 9px 10px 9px 14px;
    background: transparent;
  }

  .page-about .about-toc__link::before {
    content: "";
    position: absolute;
    left: -2px;
    top: 50%;
    width: 2px;
    height: 0;
    background: var(--whistle);
    transform: translateY(-50%);
    transition: height .2s ease-out;
  }

  .page-about .about-toc__link:hover::before,
  .page-about .about-toc__link:focus-visible::before {
    height: 72%;
  }

  .page-about .about-toc__link:hover,
  .page-about .about-toc__link:focus-visible {
    background: rgba(240, 96, 28, .07);
    border-color: transparent;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero h1 {
    font-size: clamp(60px, 6.4vw, 92px);
  }

  .page-about .flow-section {
    padding: clamp(34px, 4vw, 54px) 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc__link,
  .page-about .about-toc__link::before,
  .page-about .tl__item::before,
  .page-about .crew__role,
  .page-about .inline-link {
    transition: none;
  }
}
<<<END>>>