.page-about {
  --about-axis-w: 210px;
  --about-line: rgba(140, 122, 148, .34);
  position: relative;
  display: block;
  overflow-x: clip;
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

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

.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-about .breadcrumbs a {
  color: var(--ink-purple);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .18s ease, color .18s ease;
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  border-bottom-color: var(--amber);
}

.page-about a:focus-visible,
.page-about .tl__item:focus-visible,
.page-about .about-eco__card:focus-within {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 24px 0 clamp(38px, 6vw, 72px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  z-index: 0;
  top: -16%;
  right: -22%;
  width: 84%;
  height: 82%;
  border-radius: 0 0 0 108px;
  transform: rotate(-3deg);
  background:
    repeating-linear-gradient(90deg, rgba(251, 248, 243, .45) 0 1px, transparent 1px 34px),
    repeating-linear-gradient(0deg, rgba(251, 248, 243, .35) 0 1px, transparent 1px 34px),
    linear-gradient(158deg, rgba(91, 44, 111, .22), rgba(91, 44, 111, .02) 72%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 26px;
}

.page-about .about-hero__copy h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 7vw, 64px);
  line-height: 1.14;
  letter-spacing: .012em;
  color: var(--ink-purple);
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 26px 0 0;
  padding: 18px 0 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  border-top: 1px solid var(--lilac);
}

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

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(17px, 3.4vw, 22px);
  letter-spacing: .04em;
  color: var(--purple);
}

.page-about .about-stat__label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
}

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

.page-about .about-hero__figure .figure__frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-2);
}

.page-about .about-hero__figure img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.page-about .figure__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  position: relative;
}

.page-about .about-chapter__grid {
  display: grid;
  gap: 20px;
}

.page-about .about-chapter__side {
  position: relative;
  padding-left: 16px;
  border-left: 2px solid var(--purple);
}

.page-about .about-chapter__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--muted);
}

.page-about .about-chapter__side h2 {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(24px, 4.4vw, 36px);
  line-height: 1.28;
  letter-spacing: .01em;
  color: var(--ink-purple);
}

.page-about .about-chapter__body p {
  margin: 0 0 16px;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
}

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

.page-about .about-chapter__body h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.5;
  color: var(--ink-purple);
}

.page-about .about-chapter__body a {
  color: var(--purple);
  text-decoration: none;
  border-bottom: 1px solid var(--green);
  transition: color .18s ease, border-color .18s ease;
}

.page-about .about-chapter__body a:hover,
.page-about .about-chapter__body a:focus-visible {
  color: var(--ink-purple);
  border-bottom-color: var(--amber);
}

/* 边注 */
.page-about .about-note {
  margin: 24px 0 0;
  padding: 16px 18px;
  max-width: 30em;
  background: var(--paper);
  border-left: 1px solid var(--line, rgba(140, 122, 148, .34));
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.page-about .about-note__label {
  margin: 0 0 8px !important;
  font-family: var(--font-mono);
  font-size: 11px !important;
  letter-spacing: .12em;
  color: var(--muted) !important;
}

.page-about .about-note p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-note__top {
  display: inline-block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--purple);
  text-decoration: none;
  border-bottom: 1px dashed var(--muted);
}

/* 分层步骤 */
.page-about .about-layers {
  display: grid;
  gap: 14px;
  margin: 24px 0;
}

.page-about .about-layer {
  padding: 18px 18px 16px;
  background: var(--paper);
  border: 1px solid var(--lilac);
  border-radius: var(--radius-md);
}

.page-about .about-layer .step__num {
  background: var(--green);
  color: var(--ink-purple);
}

.page-about .about-layer h3 {
  margin: 8px 0 6px;
}

.page-about .about-layer p {
  margin: 0 !important;
  font-size: 14px !important;
  line-height: 1.8 !important;
  color: var(--ink) !important;
}

/* ---------- 时间线 ---------- */
.page-about .tl {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
}

.page-about .tl__item {
  position: relative;
  padding: 16px 0 16px 28px;
  border-left: 2px solid var(--lilac);
  transition: background-color .2s ease, box-shadow .2s ease;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 24px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--purple);
  box-shadow: 0 0 0 4px var(--sand);
  transition: background-color .2s ease;
}

.page-about .tl__item--now::before {
  background: var(--amber);
}

.page-about .tl__item:hover,
.page-about .tl__item:focus-within {
  background: var(--paper);
  box-shadow: var(--shadow-1);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.page-about .tl__item:hover::before,
.page-about .tl__item:focus-within::before {
  background: var(--amber);
}

.page-about .tl__year {
  margin: 0 !important;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 20px;
  letter-spacing: .06em;
  color: var(--purple) !important;
}

.page-about .tl__tag {
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  background: var(--lilac);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--ink-purple);
}

.page-about .tl__item--now .tl__tag {
  background: var(--green);
}

.page-about .tl__item h3 {
  margin: 8px 0 6px;
  font-size: 17px;
}

.page-about .tl__desc {
  margin: 0 !important;
  max-width: 34em;
  font-size: 14px !important;
  line-height: 1.8 !important;
  color: var(--ink) !important;
}

.page-about .about-tl-figure {
  margin: 0 0 20px;
}

.page-about .about-tl-figure .figure__frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-1);
}

.page-about .about-tl-figure img {
  width: 100%;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-about .about-tail-link {
  font-size: 14px !important;
  color: var(--muted) !important;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 14px;
  margin-bottom: 24px;
}

.page-about .about-team__card {
  padding: 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--lilac);
}

.page-about .about-team__card--purple {
  background: var(--purple);
  border-color: var(--purple);
}

.page-about .about-team__card--green {
  background: var(--green);
}

.page-about .about-team__card--sand {
  background: var(--paper);
}

.page-about .about-team__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 34px;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--ink-purple);
}

.page-about .about-team__card--purple .about-team__num,
.page-about .about-team__card--purple .about-team__role,
.page-about .about-team__card--purple .about-team__desc {
  color: var(--paper);
}

.page-about .about-team__role {
  margin: 12px 0 6px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: var(--ink-purple);
}

.page-about .about-team__desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  background:
    repeating-linear-gradient(0deg, rgba(110, 139, 116, .10) 0 1px, transparent 1px 42px),
    linear-gradient(180deg, rgba(231, 221, 235, .55), rgba(244, 233, 218, 0));
}

.page-about .about-eco__list {
  list-style: none;
  margin: 22px 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-eco__card {
  position: relative;
  padding: 18px;
  background: var(--paper);
  border: 1px solid var(--lilac);
  border-radius: var(--radius-md);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

.page-about .about-eco__card:hover,
.page-about .about-eco__card:focus-within {
  transform: translateY(-4px);
  box-shadow: var(--shadow-2);
  border-color: var(--green);
}

.page-about .about-eco__card h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.page-about .about-eco__card p {
  margin: 0 0 12px !important;
  font-size: 14px !important;
  line-height: 1.8 !important;
  color: var(--ink) !important;
}

.page-about .about-eco__tag {
  display: inline-block;
  padding: 3px 11px;
  border-radius: var(--radius-pill);
  background: var(--green);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--ink-purple);
  transition: background-color .2s ease;
}

.page-about .about-eco__card:hover .about-eco__tag {
  background: var(--amber);
}

.page-about .about-eco__foot {
  display: grid;
  gap: 18px;
  margin-top: 8px;
}

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

.page-about .about-eco__visual .figure__frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-about .about-eco__visual img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-eco__trust {
  padding: 18px 20px;
  background: var(--ink-purple);
  border-radius: var(--radius-lg);
}

.page-about .about-eco__trust h3 {
  margin: 0 0 10px !important;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: var(--sand) !important;
}

.page-about .about-eco__trust p {
  margin: 0 0 14px !important;
  font-size: 14px !important;
  line-height: 1.85 !important;
  color: rgba(244, 233, 218, .9) !important;
}

.page-about .about-eco__trust .about-inline-link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .18s ease, color .18s ease;
}

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

/* ---------- 标准 ---------- */
.page-about .about-std {
  margin: 22px 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--lilac);
}

.page-about .about-std__row {
  padding: 16px 0;
  border-bottom: 1px solid var(--lilac);
}

.page-about .about-std dt {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--purple);
}

.page-about .about-std dd {
  margin: 8px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta__panel {
  padding: clamp(26px, 5vw, 48px) clamp(22px, 4vw, 44px);
  background:
    repeating-linear-gradient(90deg, rgba(244, 233, 218, .10) 0 1px, transparent 1px 40px),
    var(--ink-purple);
  border-radius: var(--radius-lg);
}

.page-about .about-cta__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: rgba(244, 233, 218, .72);
}

.page-about .about-cta__panel h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(23px, 4.2vw, 34px);
  line-height: 1.3;
  color: var(--paper);
}

.page-about .about-cta__text {
  margin: 14px 0 24px;
  max-width: 32em;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 233, 218, .86);
}

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

.page-about .about-cta__btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  background: var(--sand);
  color: var(--ink-purple);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform .2s ease, background-color .2s ease;
}

.page-about .about-cta__btn:hover {
  transform: translateY(-2px);
  background: var(--green);
}

.page-about .about-cta__btn--ghost {
  background: transparent;
  color: var(--sand);
  border-color: rgba(244, 233, 218, .45);
}

.page-about .about-cta__btn--ghost:hover {
  background: rgba(244, 233, 218, .14);
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-about .about-layers {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .page-about .about-std {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 32px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: 34px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .84fr);
    gap: 52px;
    align-items: end;
  }

  .page-about .about-hero__copy {
    padding-bottom: clamp(6px, 2vw, 28px);
  }

  .page-about .about-chapter__grid {
    grid-template-columns: var(--about-axis-w) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-chapter__side {
    position: sticky;
    top: 118px;
    padding-left: 18px;
  }

  .page-about .about-chapter--shift .about-chapter__grid {
    padding-left: 52px;
  }

  .page-about .about-chapter--flip .about-chapter__side {
    order: 2;
    border-left: 0;
    border-right: 2px solid var(--purple);
    padding-left: 0;
    padding-right: 18px;
    text-align: right;
  }

  .page-about .about-chapter--flip .about-chapter__grid {
    grid-template-columns: minmax(0, 1fr) var(--about-axis-w);
  }

  .page-about .about-eco__foot {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }

  .page-about .about-std {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 48px;
  }

  .page-about .about-cta__panel {
    max-width: 900px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-axis {
    display: block;
    position: absolute;
    top: 0;
    bottom: 0;
    right: 20px;
    width: 2px;
    background: repeating-linear-gradient(to bottom, var(--lilac) 0 6px, transparent 6px 16px);
    pointer-events: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-eco__card,
  .page-about .about-cta__btn,
  .page-about .tl__item {
    transition: none;
  }

  .page-about .about-eco__card:hover,
  .page-about .about-cta__btn:hover {
    transform: none;
  }
}
<<<END>>>

.page-about {
  --line: var(--ink);
}