.page-about {
  --about-lift-1: #101C16;
  --about-lift-2: #14261C;
  --about-lift-3: #1A3326;
  --about-focus: 2px solid var(--amber);
  background: var(--ink);
  color: var(--white);
  font-family: var(--f-body);
  overflow-x: clip;
}

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

.page-about .section {
  padding-block: clamp(40px, 7vw, 84px);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--f-head);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin: 0;
}

.page-about p {
  margin: 0;
}

.page-about a:focus-visible,
.page-about [tabindex]:focus-visible {
  outline: var(--about-focus);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(20px, 4vw, 40px) clamp(36px, 6vw, 72px);
  border-bottom: var(--line);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(31, 164, 91, 0.26), transparent 62%),
    radial-gradient(90% 80% at 0% 110%, rgba(255, 90, 43, 0.14), transparent 60%),
    var(--ink);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(35, 60, 46, 0.55) 0 3px,
    transparent 3px 96px
  );
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-hero .wrap {
  position: relative;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  margin-top: clamp(20px, 4vw, 36px);
}

.page-about .about-hero__lead h1 {
  font-size: clamp(30px, 7.2vw, 64px);
  margin-top: 14px;
  text-wrap: balance;
}

.page-about .about-hero__lead .lede {
  margin-top: 18px;
  max-width: 40ch;
  color: var(--white);
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.75;
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 0;
  margin: clamp(22px, 4vw, 34px) 0 0;
  padding: 0;
}

.page-about .about-hero__meta > div {
  padding-right: clamp(14px, 3vw, 28px);
  margin-right: clamp(14px, 3vw, 28px);
  border-right: 2px solid var(--fence);
}

.page-about .about-hero__meta > div:last-child {
  border-right: 0;
  padding-right: 0;
  margin-right: 0;
}

.page-about .about-hero__meta dt {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--pitch-hi);
  text-transform: uppercase;
}

.page-about .about-hero__meta dd {
  margin: 6px 0 0;
  font-size: 14px;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__index {
  align-self: start;
  background: var(--ink-2);
  border: var(--line);
  box-shadow: var(--hard);
  border-radius: var(--r);
  padding: clamp(16px, 3vw, 24px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-index__title {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mute);
  padding-bottom: 12px;
  border-bottom: 3px solid var(--fence);
}

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

.page-about .about-index__list li + li {
  border-top: 1px solid var(--fence);
}

.page-about .about-index__list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 4px;
  color: var(--white);
  text-decoration: none;
  font-size: 15px;
  transition: color 120ms ease, transform 120ms ease;
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--pitch-hi);
  transform: translateX(4px);
}

.page-about .about-index__no {
  font-family: var(--f-mono);
  font-size: 12px;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

/* ---------- 主张 ---------- */
.page-about .about-belief {
  background: linear-gradient(180deg, var(--ink) 0%, var(--about-lift-1) 100%);
}

.page-about .about-belief__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-about .about-belief__text .sec-title {
  font-size: clamp(24px, 4vw, 40px);
  margin-top: 12px;
}

.page-about .about-prose {
  margin-top: 22px;
  border-left: var(--line);
  padding-left: clamp(16px, 3vw, 26px);
}

.page-about .about-prose p {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.82;
  color: #DDE7E0;
}

.page-about .about-prose p + p {
  margin-top: 16px;
}

.page-about .about-prose p:first-child::first-letter {
  float: left;
  font-family: var(--f-head);
  font-weight: 900;
  font-size: 2.9em;
  line-height: 0.84;
  padding: 4px 10px 0 0;
  color: var(--pitch-hi);
}

.page-about .about-belief__side {
  background: var(--ink-2);
  border: var(--line);
  box-shadow: var(--hard);
  border-radius: var(--r);
  padding: clamp(16px, 3vw, 24px);
}

.page-about .about-side__title {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mute);
  padding-bottom: 12px;
  border-bottom: 3px solid var(--fence);
}

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

.page-about .about-side__list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 0;
  font-size: 14px;
  line-height: 1.7;
  color: #DDE7E0;
}

.page-about .about-side__list li + li {
  border-top: 1px solid var(--fence);
}

.page-about .about-side__list .tag {
  flex: 0 0 auto;
  margin-top: 2px;
}

/* ---------- 阶段时间轴 ---------- */
.page-about .about-stages {
  background: linear-gradient(180deg, var(--about-lift-1) 0%, var(--about-lift-2) 55%, var(--about-lift-3) 100%);
  border-block: var(--line);
}

.page-about .about-head {
  max-width: 62ch;
}

.page-about .about-head .sec-title {
  font-size: clamp(24px, 4vw, 40px);
  margin-top: 12px;
}

.page-about .about-head__sub {
  margin-top: 14px;
  color: var(--mute);
  font-size: 15px;
  line-height: 1.78;
  max-width: 46ch;
}

.page-about .about-timeline {
  list-style: none;
  margin: clamp(26px, 5vw, 44px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 10px;
  bottom: 10px;
  width: 3px;
  background: linear-gradient(180deg, var(--pitch-hi), var(--pitch) 40%, var(--fence));
}

.page-about .about-stage {
  position: relative;
  padding-left: 44px;
}

.page-about .about-stage + .about-stage {
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-stage__dot {
  position: absolute;
  left: 4px;
  top: 16px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--pitch);
  border: 3px solid var(--ink);
  box-shadow: 0 0 0 3px var(--fence);
}

.page-about .about-stage__body {
  background: var(--ink-2);
  border: var(--line);
  box-shadow: var(--hard);
  border-radius: var(--r);
  padding: clamp(16px, 3vw, 28px);
}

.page-about .about-stage:nth-child(2) .about-stage__body {
  background: var(--about-lift-2);
}

.page-about .about-stage:nth-child(3) .about-stage__body {
  background: var(--about-lift-3);
}

.page-about .about-stage:nth-child(2) .about-stage__dot {
  background: var(--pitch-hi);
}

.page-about .about-stage:nth-child(3) .about-stage__dot {
  background: var(--amber);
}

.page-about .about-stage__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.page-about .about-stage__era {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mute);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stage__body h3 {
  font-size: clamp(18px, 2.4vw, 24px);
  margin-top: 12px;
}

.page-about .about-stage__body > p {
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.8;
  color: #DDE7E0;
  max-width: 60ch;
}

.page-about .about-stage__points {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-stage__points li {
  position: relative;
  padding-left: 20px;
  font-family: var(--f-mono);
  font-size: 13px;
  color: var(--pitch-hi);
}

.page-about .about-stage__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 10px;
  height: 3px;
  background: var(--pitch);
}

/* ---------- 校对流程 ---------- */
.page-about .about-proof {
  background: var(--ink);
}

.page-about .about-proof__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-about .about-proof__main .sec-title {
  font-size: clamp(24px, 4vw, 38px);
  margin-top: 12px;
}

.page-about .about-flow {
  list-style: none;
  margin: clamp(22px, 4vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-flow__step {
  border-left: 3px solid var(--fence);
  background: var(--about-lift-1);
  padding: 14px 16px;
  border-radius: 0 var(--r) var(--r) 0;
  transition: transform 120ms ease, border-color 120ms ease, background-color 120ms ease;
}

.page-about .about-flow__step:hover,
.page-about .about-flow__step:focus-visible {
  transform: translateX(6px);
  border-left-color: var(--attack);
  background: var(--about-lift-2);
}

.page-about .about-flow__no {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-about .about-flow__step h3 {
  font-size: 17px;
  margin-top: 6px;
}

.page-about .about-flow__step p {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mute);
}

.page-about .about-proof__media {
  margin: 0;
  border: var(--line);
  box-shadow: var(--hard);
  border-radius: var(--r);
  overflow: hidden;
  background: var(--ink-2);
  align-self: start;
}

.page-about .about-proof__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.page-about .about-proof__media figcaption {
  padding: 14px 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mute);
  border-top: 3px solid var(--fence);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: linear-gradient(180deg, var(--ink) 0%, var(--about-lift-1) 100%);
  border-top: var(--line);
}

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

.page-about .about-team__donut {
  position: relative;
  width: min(280px, 80%);
  margin-inline: auto;
}

.page-about .about-team__svg {
  display: block;
  width: 100%;
  height: auto;
  transform: rotate(-90deg);
}

.page-about .about-team__base {
  fill: none;
  stroke: var(--fence);
  stroke-width: 18;
}

.page-about .seg {
  fill: none;
  stroke-width: 18;
  transition: stroke-width 140ms ease, opacity 140ms ease;
}

.page-about .seg--a { stroke: var(--pitch); }
.page-about .seg--b { stroke: var(--pitch-hi); }
.page-about .seg--c { stroke: var(--amber); }
.page-about .seg--d { stroke: var(--mute); }

.page-about .about-team__donut:hover .seg {
  opacity: 0.4;
}

.page-about .about-team__donut .seg:hover {
  opacity: 1;
  stroke-width: 26;
}

.page-about .about-team__center {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  pointer-events: none;
}

.page-about .about-team__center strong {
  display: block;
  font-family: var(--f-head);
  font-weight: 900;
  font-size: clamp(34px, 6vw, 46px);
  line-height: 1;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team__center span {
  display: block;
  margin-top: 4px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mute);
}

.page-about .about-team__legend {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-team__legend li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: var(--ink-2);
  border: 1px solid var(--fence);
  border-radius: var(--r);
  font-size: 14px;
  transition: border-color 120ms ease, transform 120ms ease;
}

.page-about .about-team__legend li:hover {
  border-color: var(--pitch);
  transform: translateX(4px);
}

.page-about .swatch {
  width: 14px;
  height: 14px;
  flex: 0 0 auto;
  border-radius: 2px;
}

.page-about .swatch--a { background: var(--pitch); }
.page-about .swatch--b { background: var(--pitch-hi); }
.page-about .swatch--c { background: var(--amber); }
.page-about .swatch--d { background: var(--mute); }

.page-about .about-team__role {
  flex: 1 1 auto;
  color: #DDE7E0;
}

.page-about .about-team__num {
  font-family: var(--f-mono);
  font-size: 13px;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team__text .sec-title {
  font-size: clamp(24px, 4vw, 38px);
  margin-top: 12px;
}

.page-about .about-team__text > p {
  margin-top: 16px;
  font-size: 15px;
  line-height: 1.8;
  color: #DDE7E0;
  max-width: 58ch;
}

.page-about .about-team__link {
  margin-top: 24px !important;
}

/* ---------- 地域气质 ---------- */
.page-about .about-place {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: 360px;
  border-block: var(--line);
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .about-place__media {
  position: absolute;
  inset: 0;
}

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

.page-about .about-place__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(11, 19, 16, 0.28) 0%, rgba(11, 19, 16, 0.86) 62%, rgba(11, 19, 16, 0.97) 100%),
    radial-gradient(80% 70% at 20% 0%, rgba(255, 194, 75, 0.16), transparent 60%);
}

.page-about .about-place .wrap {
  position: relative;
}

.page-about .about-place__body {
  padding-block: clamp(140px, 30vw, 260px) clamp(34px, 6vw, 64px);
  max-width: 62ch;
}

.page-about .about-place__body .sec-title {
  font-size: clamp(24px, 4vw, 40px);
  margin-top: 12px;
}

.page-about .about-place__body p {
  margin-top: 16px;
  font-size: 15px;
  line-height: 1.82;
  color: #E7F0EA;
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  background: var(--ink);
}

.page-about .about-partners__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-about .about-partners__text .sec-title {
  font-size: clamp(24px, 4vw, 38px);
  margin-top: 12px;
}

.page-about .about-partners__text > p {
  margin-top: 16px;
  font-size: 15px;
  line-height: 1.8;
  color: #DDE7E0;
  max-width: 58ch;
}

.page-about .about-partners__stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
}

.page-about .about-partners__stats li {
  background: var(--ink-2);
  border: var(--line);
  border-radius: var(--r);
  padding: 14px 12px;
  box-shadow: var(--hard-sm);
}

.page-about .about-partners__stats strong {
  display: block;
  font-family: var(--f-head);
  font-weight: 900;
  font-size: clamp(24px, 4vw, 34px);
  line-height: 1;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-about .about-partners__stats span {
  display: block;
  margin-top: 8px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mute);
}

.page-about .about-partners__media {
  margin: 0;
  border: var(--line);
  box-shadow: var(--hard);
  border-radius: var(--r);
  overflow: hidden;
  background: var(--ink-2);
  align-self: start;
}

.page-about .about-partners__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-partners__media figcaption {
  padding: 14px 16px;
  border-top: 3px solid var(--fence);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mute);
}

/* ---------- 收尾 ---------- */
.page-about .about-next {
  background:
    linear-gradient(180deg, var(--about-lift-1) 0%, var(--ink) 100%);
  border-top: var(--line);
}

.page-about .about-next__grid {
  display: grid;
  gap: 24px;
  align-items: center;
}

.page-about .about-next__text .sec-title {
  font-size: clamp(22px, 3.4vw, 34px);
}

.page-about .about-next__text p {
  margin-top: 12px;
  color: var(--mute);
  font-size: 15px;
  line-height: 1.8;
  max-width: 40ch;
}

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

.page-about .about-next__links .btn {
  flex: 1 1 190px;
  justify-content: center;
  text-align: center;
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-about .about-belief__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-about .about-proof__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: center;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .about-stage {
    padding-left: 64px;
  }

  .page-about .about-timeline::before {
    left: 15px;
  }

  .page-about .about-stage__dot {
    left: 6px;
    width: 24px;
    height: 24px;
  }

  .page-about .about-next__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 32px;
  }

  .page-about .about-next__links {
    justify-content: flex-end;
  }

  .page-about .about-next__links .btn {
    flex: 0 0 auto;
  }
}

@media (min-width: 1000px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-about .about-hero__index {
    margin-top: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
  }
}
<<<END>>>