.page-about {
  --about-panel: rgba(30, 58, 95, 0.34);
  --about-panel-soft: rgba(30, 58, 95, 0.2);
  position: relative;
  overflow-x: clip;
  color: var(--ice);
  background:
    radial-gradient(120% 58% at 88% -8%, rgba(59, 42, 107, 0.5) 0%, rgba(11, 30, 58, 0) 62%),
    linear-gradient(180deg, var(--navy) 0%, var(--navy) 58%, var(--ink) 100%);
}

.page-about::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(159, 179, 200, 0.16) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(159, 179, 200, 0.16) 1px, transparent 1px);
  background-size: 96px 96px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.18) 42%, transparent 82%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.18) 42%, transparent 82%);
  z-index: 0;
}

.page-about .about-wrap {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
  padding-block: 26px 84px;
}

.page-about .breadcrumb {
  margin-bottom: 26px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  display: grid;
  gap: 34px;
  padding-block: 8px 52px;
}

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

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -56px;
  right: calc(var(--gutter) * -1);
  width: 68%;
  height: 240px;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.18), rgba(59, 42, 107, 0));
  -webkit-clip-path: polygon(0 0, 100% 0, 100% 100%, 26% 100%);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 26% 100%);
  pointer-events: none;
  z-index: 0;
}

.page-about h1 {
  margin: 14px 0 0;
  font-size: clamp(32px, 6.6vw, 62px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--ice);
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line-soft);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.page-about .about-hero__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 27px;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
}

.page-about .about-hero__unit {
  display: block;
  margin-top: 7px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__figure {
  margin: 0;
  position: relative;
  padding: 10px;
  border: 1px solid var(--line-mid);
  background: var(--ink);
}

.page-about .about-hero__figure::before,
.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border: 1px solid var(--cyan);
  opacity: 0.85;
}

.page-about .about-hero__figure::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .about-hero__figure::after {
  bottom: -1px;
  right: -1px;
  border-left: 0;
  border-top: 0;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.05);
}

.page-about .about-hero__figure figcaption {
  margin-top: 10px;
  color: var(--mist);
}

/* ---------- 长卷骨架 ---------- */
.page-about .about-chronicle {
  display: grid;
  gap: 34px;
  padding-top: 6px;
}

.page-about .year-rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 10px 0;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  scrollbar-width: thin;
}

.page-about .year-rail__label {
  display: none;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist);
  writing-mode: vertical-rl;
  text-orientation: mixed;
}

.page-about .year-rail__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  padding: 7px 12px;
  border: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--mist);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .year-rail__link:hover,
.page-about .year-rail__link:focus-visible {
  color: var(--cyan);
  border-color: var(--line-cyan);
}

/* ---------- 章节 ---------- */
.page-about .chapter {
  padding-block: 42px;
  border-top: 1px solid var(--line-soft);
}

.page-about .chapter:first-child {
  border-top: 0;
  padding-top: 4px;
}

.page-about .chapter-head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.page-about .chapter-head h2 {
  margin: 0;
  max-width: 22em;
  font-size: clamp(23px, 3.8vw, 36px);
  line-height: 1.26;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--ice);
}

.page-about .chapter-head h2::after {
  content: "";
  display: block;
  width: 44px;
  height: 3px;
  margin-top: 15px;
  background: var(--cyan);
}

.page-about .chapter-body p {
  margin: 0 0 16px;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

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

.page-about .inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.4);
}

.page-about .inline-link:hover {
  border-bottom-color: var(--cyan);
}

.page-about .pull {
  margin: 24px 0 0;
  padding: 18px 20px;
  max-width: 38em;
  border-left: 3px solid var(--cyan);
  background: rgba(0, 229, 255, 0.07);
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ice);
}

/* ---------- 时间线 ---------- */
.page-about .timeline-figure {
  margin: 0 0 26px;
  border: 1px solid var(--line-soft);
  background: var(--ink);
}

.page-about .timeline-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .timeline-figure figcaption {
  padding: 10px 14px;
  color: var(--mist);
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--line-soft);
  display: grid;
  gap: 12px;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 21px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--navy);
  border: 1px solid var(--cyan);
  box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.12);
}

.page-about .timeline__node {
  border: 1px solid var(--line-soft);
  background: linear-gradient(180deg, var(--about-panel), rgba(11, 30, 58, 0.25));
  transition: border-color 0.2s var(--ease);
}

.page-about .timeline__node[open] {
  border-color: var(--line-cyan);
}

.page-about .timeline__node > summary {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) 14px;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  list-style: none;
  cursor: pointer;
}

.page-about .timeline__node > summary::-webkit-details-marker {
  display: none;
}

.page-about .timeline__year {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

.page-about .timeline__title {
  font-size: 14.5px;
  line-height: 1.6;
  font-weight: 600;
  color: var(--ice);
}

.page-about .timeline__marker {
  position: relative;
  width: 13px;
  height: 13px;
}

.page-about .timeline__marker::before,
.page-about .timeline__marker::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 0.2s var(--ease);
}

.page-about .timeline__marker::before {
  left: 0;
  top: 6px;
  width: 13px;
  height: 1px;
}

.page-about .timeline__marker::after {
  left: 6px;
  top: 0;
  width: 1px;
  height: 13px;
}

.page-about .timeline__node[open] .timeline__marker::after {
  transform: scaleY(0);
}

.page-about .timeline__body {
  padding: 0 16px 16px 74px;
}

.page-about .timeline__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .timeline__foot {
  margin: 22px 0 0;
  padding: 16px 18px;
  border-left: 2px solid var(--gold);
  background: rgba(201, 162, 39, 0.08);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 流程 ---------- */
.page-about .flow {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .flow__step {
  padding: 20px 18px 22px;
  background: rgba(11, 30, 58, 0.92);
}

.page-about .flow__index {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .flow__step h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ice);
}

.page-about .flow__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .flow + .chapter-body {
  margin-top: 22px;
}

/* ---------- 团队 ---------- */
.page-about .crew {
  display: grid;
  gap: 26px;
}

.page-about .crew__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .crew__stat {
  padding: 18px 16px;
  background: rgba(11, 30, 58, 0.92);
}

.page-about .crew__stat--total {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.14), rgba(59, 42, 107, 0.42));
}

.page-about .crew__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
}

.page-about .crew__stat--total .crew__num {
  font-size: 50px;
}

.page-about .crew__label {
  display: block;
  margin-top: 9px;
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--ice);
}

.page-about .crew__desc {
  margin: 8px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .crew__figure {
  margin: 0;
  padding: 8px;
  border: 1px solid var(--line-mid);
  background: var(--ink);
}

.page-about .crew__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .crew__figure figcaption {
  margin-top: 9px;
  color: var(--mist);
}

/* ---------- 生态 ---------- */
.page-about .eco {
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .eco__card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 24px 20px;
  color: var(--ice);
}

.page-about .eco__card--indigo {
  background-color: var(--indigo);
  background-image: linear-gradient(150deg, rgba(0, 0, 0, 0.22), rgba(0, 0, 0, 0));
}

.page-about .eco__card--teal {
  background-color: var(--teal);
  background-image: linear-gradient(150deg, rgba(0, 0, 0, 0.22), rgba(0, 0, 0, 0));
}

.page-about .eco__card--wine {
  background-color: var(--wine);
  background-image: linear-gradient(150deg, rgba(0, 0, 0, 0.22), rgba(0, 0, 0, 0));
}

.page-about .eco__num {
  font-family: var(--font-mono);
  font-size: 34px;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ice);
}

.page-about .eco__title {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ice);
}

.page-about .eco__text {
  margin: 4px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: rgba(232, 244, 255, 0.82);
}

.page-about .cert {
  margin-top: 22px;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .cert__item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 16px 18px;
  background: rgba(6, 20, 38, 0.78);
}

.page-about .cert__badge {
  flex: 0 0 auto;
  padding: 3px 7px;
  border: 1px solid rgba(201, 162, 39, 0.55);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .cert__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 适用对象 ---------- */
.page-about .audience {
  display: grid;
  gap: 14px;
}

.page-about .audience__card {
  padding: 20px 18px;
  border: 1px solid var(--line-soft);
  background: var(--about-panel-soft);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .audience__card h3 {
  margin: 0 0 10px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ice);
}

.page-about .audience__card h3::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 2px;
  margin-right: 9px;
  vertical-align: middle;
  background: var(--cyan);
}

.page-about .audience__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

@media (hover: hover) {
  .page-about .audience__card:hover {
    border-color: var(--line-cyan);
    transform: translateY(-2px);
  }
}

/* ---------- 价值索引 ---------- */
.page-about .value-index {
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .value-index__item {
  display: grid;
  gap: 8px;
  padding: 22px 20px;
  background: rgba(11, 30, 58, 0.92);
  color: inherit;
  text-decoration: none;
  transition: background 0.2s var(--ease);
}

.page-about .value-index__item:hover,
.page-about .value-index__item:focus-visible {
  background: rgba(0, 229, 255, 0.09);
}

.page-about .value-index__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .value-index__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--ice);
}

.page-about .value-index__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .value-index__go {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  margin-top: 44px;
  padding: 30px 22px;
  display: grid;
  gap: 18px;
  border: 1px solid var(--line-cyan);
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.1), rgba(59, 42, 107, 0.3));
}

.page-about .about-cta__title {
  margin: 0 0 10px;
  font-size: clamp(20px, 3vw, 26px);
  line-height: 1.35;
  font-weight: 800;
  color: var(--ice);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 32em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

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

/* ---------- 平板与桌面 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-hero__lede {
    font-size: 16.5px;
  }

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

  .page-about .audience {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 768px) {
  .page-about .eco {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 48px;
    align-items: center;
    padding-block: 22px 70px;
  }

  .page-about .about-hero::after {
    top: -70px;
    width: 58%;
    height: 280px;
  }

  .page-about .crew {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    gap: 32px;
    align-items: start;
  }
}

@media (min-width: 992px) {
  .page-about .about-chronicle {
    grid-template-columns: 134px minmax(0, 1fr);
    gap: 54px;
    align-items: start;
  }

  .page-about .year-rail {
    display: block;
    position: sticky;
    top: 92px;
    overflow: visible;
    padding: 0 0 0 18px;
    border: 0;
    border-left: 1px solid var(--line-soft);
  }

  .page-about .year-rail__label {
    display: block;
    margin-bottom: 18px;
  }

  .page-about .year-rail__link {
    position: relative;
    display: flex;
    width: 100%;
    padding: 9px 0;
    border: 0;
  }

  .page-about .year-rail__link::before {
    content: "";
    position: absolute;
    left: -23px;
    top: 50%;
    width: 9px;
    height: 1px;
    background: var(--line-mid);
    transition: width 0.2s var(--ease), background 0.2s var(--ease);
  }

  .page-about .year-rail__link:hover::before,
  .page-about .year-rail__link:focus-visible::before {
    width: 15px;
    background: var(--cyan);
  }

  .page-about .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
    padding: 36px 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .audience__card,
  .page-about .timeline__marker::before,
  .page-about .timeline__marker::after,
  .page-about .year-rail__link,
  .page-about .year-rail__link::before {
    transition: none;
  }

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