.page-about {
  --about-dim: rgba(14, 42, 36, .72);
  --about-hairline: rgba(14, 42, 36, .14);
  background-color: var(--porcelain);
  color: var(--ink);
  font-family: var(--font-body);
}

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

.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 3.4vw, 44px) 0 clamp(32px, 5vw, 68px);
  isolation: isolate;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -150px;
  right: -140px;
  width: clamp(300px, 48vw, 700px);
  aspect-ratio: 1 / 1;
  border-radius: 46% 54% 38% 62% / 52% 40% 60% 48%;
  background:
    radial-gradient(circle at 32% 30%, rgba(47, 122, 99, .24), transparent 62%),
    radial-gradient(circle at 70% 68%, rgba(201, 164, 92, .30), transparent 60%),
    linear-gradient(140deg, rgba(23, 71, 59, .14), rgba(247, 243, 234, 0));
  z-index: -1;
  pointer-events: none;
}

.page-about .about-hero-inner {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: end;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(29px, 4.9vw, 56px);
  line-height: 1.24;
  letter-spacing: -.01em;
  margin: 14px 0 0;
  max-width: 15em;
}

.page-about .about-hero .lede {
  margin-top: 18px;
  max-width: 42em;
}

.page-about .about-hero-stats {
  list-style: none;
  margin: clamp(24px, 3vw, 38px) 0 0;
  padding: 22px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 18px;
  border-top: 1px solid var(--gold-35);
}

.page-about .about-hero-stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .about-stat-num {
  font-size: clamp(23px, 3vw, 32px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--jade);
}

.page-about .about-stat-label {
  font-size: 13px;
  color: var(--about-dim);
}

.page-about .about-hero-figure {
  margin: 0;
  border-radius: 200px 160px 190px 150px / 170px 190px 150px 200px;
  overflow: hidden;
  border: 1px solid var(--gold-35);
  box-shadow: var(--shadow-soft);
  aspect-ratio: 4 / 3;
  background: var(--rice);
}

.page-about .about-hero-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 目录 + 正文骨架 ---------- */
.page-about .about-shell {
  display: grid;
  gap: clamp(26px, 3.6vw, 52px);
  padding-bottom: clamp(48px, 7vw, 100px);
}

.page-about .about-index {
  border-top: 2px solid var(--ink);
  padding-top: 14px;
}

.page-about .about-index-title {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--about-dim);
  margin: 0 0 12px;
}

.page-about .about-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 2px 14px;
}

.page-about .about-index-list li {
  min-width: 0;
}

.page-about .about-index-list a {
  display: inline-flex;
  gap: 8px;
  align-items: baseline;
  padding: 6px 0;
  color: var(--ink);
  text-decoration: none;
  font-size: 14.5px;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-index-list a:hover,
.page-about .about-index-list a:focus-visible {
  color: var(--jade);
  border-bottom-color: var(--gold-60);
}

.page-about .about-index-list .num {
  font-size: 11px;
  color: var(--jade);
  letter-spacing: .06em;
}

/* ---------- 章节 ---------- */
.page-about .about-section {
  padding: clamp(28px, 4vw, 50px) 0;
  border-top: 1px solid var(--about-hairline);
}

.page-about .about-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-label {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--ink-2);
  background: var(--rice);
  border-left: 3px solid var(--gold);
  padding: 5px 12px;
  margin: 0 0 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.page-about .about-section h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(23px, 3.1vw, 36px);
  line-height: 1.3;
  margin: 0 0 16px;
}

.page-about .about-section h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.45;
  margin: 0 0 8px;
}

.page-about .about-lede {
  font-size: clamp(15px, 1.25vw, 17px);
  line-height: 1.8;
  color: var(--about-dim);
  margin: 0 0 22px;
  max-width: 60ch;
}

.page-about .about-prose p {
  font-size: clamp(15px, 1.25vw, 17px);
  line-height: 1.85;
  margin: 0 0 14px;
  max-width: 64ch;
}

.page-about .about-prose a {
  color: var(--ink-2);
  text-decoration: underline;
  text-decoration-color: var(--gold-60);
  text-underline-offset: 3px;
}

.page-about .about-prose a:hover {
  color: var(--jade);
}

/* ---------- 起点三卡 ---------- */
.page-about .about-pillars {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.page-about .about-pillar {
  background: var(--rice);
  border: 1px solid rgba(14, 42, 36, .07);
  border-radius: var(--radius-md);
  padding: 20px 20px 22px;
}

.page-about .about-pillar p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--about-dim);
}

/* ---------- 图片容器 ---------- */
.page-about .about-plate {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--gold-35);
  background: var(--rice);
}

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

.page-about .about-plate--banner {
  aspect-ratio: 1400 / 600;
  margin: 0 0 clamp(22px, 3vw, 34px);
}

.page-about .about-plate--team {
  aspect-ratio: 10 / 7;
  border-radius: var(--radius-lg);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-timeline > li {
  position: relative;
  padding: 16px 0 16px 26px;
  border-left: 1px solid var(--gold-35);
}

.page-about .about-timeline > li::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 24px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
}

.page-about .about-timeline summary {
  list-style: none;
  cursor: pointer;
  display: block;
  padding-right: 24px;
  position: relative;
}

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

.page-about .about-timeline summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 0;
  font-family: var(--font-num);
  font-size: 16px;
  line-height: 1.4;
  color: var(--jade);
}

.page-about .about-timeline details[open] summary::after {
  content: "−";
}

.page-about .about-timeline summary:focus-visible {
  outline: 2px solid var(--jade);
  outline-offset: 4px;
}

.page-about .about-tl-year {
  display: block;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--jade);
  line-height: 1.3;
}

.page-about .about-tl-title {
  display: block;
  margin-top: 4px;
  font-size: 14.5px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--ink);
}

.page-about .about-timeline details p {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--about-dim);
}

/* ---------- 团队 ---------- */
.page-about .about-team-head {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .about-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 18px;
}

.page-about .about-team-card {
  --team-accent: var(--ink-2);
  background: var(--rice);
  border: 1px solid rgba(14, 42, 36, .07);
  border-top: 3px solid var(--team-accent);
  border-radius: var(--radius-md);
  padding: 18px 18px 20px;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-team-card:nth-child(2) { --team-accent: var(--jade); }
.page-about .about-team-card:nth-child(3) { --team-accent: var(--wine); }
.page-about .about-team-card:nth-child(4) { --team-accent: var(--indigo); }

.page-about .about-team-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-soft);
}

.page-about .about-team-num {
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--team-accent);
  margin: 0 0 10px;
}

.page-about .about-team-card p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-dim);
}

/* ---------- 服务覆盖 ---------- */
.page-about .about-coverage {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
}

.page-about .about-figures {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-left: 2px solid var(--gold-35);
}

.page-about .about-figures li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0 12px 18px;
  border-bottom: 1px dashed rgba(14, 42, 36, .14);
}

.page-about .about-figures li:last-child {
  border-bottom: 0;
}

.page-about .about-figure-num {
  font-size: clamp(24px, 2.8vw, 30px);
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
  letter-spacing: -.02em;
}

.page-about .about-figure-num em {
  font-style: normal;
  font-size: .62em;
  color: var(--jade);
  margin-left: 2px;
}

.page-about .about-figure-label {
  font-size: 13.5px;
  color: var(--about-dim);
}

.page-about .about-side-note {
  display: block;
  margin: 18px 0 0;
  padding: 14px 16px;
  background: var(--rice);
  border-left: 3px solid var(--mist);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--about-dim);
  max-width: 58ch;
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-side-note:hover,
.page-about .about-side-note:focus-visible {
  border-left-color: var(--gold);
  outline: none;
}

.page-about .about-side-mark {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 10.5px;
  letter-spacing: .14em;
  color: var(--ink-2);
  background: var(--porcelain);
  border: 1px solid var(--gold-35);
  border-radius: 999px;
  padding: 1px 8px;
  margin-right: 8px;
}

/* ---------- 整理工序 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-flow li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--about-hairline);
}

.page-about .about-flow li:last-child {
  border-bottom: 1px solid var(--about-hairline);
}

.page-about .about-flow-num {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--jade);
  padding-top: 4px;
}

.page-about .about-flow p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--about-dim);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-eco li {
  padding: 18px 18px 20px;
  border-radius: var(--radius-md);
  background: var(--rice);
  border: 1px solid rgba(14, 42, 36, .07);
}

.page-about .about-eco-num {
  display: block;
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--jade);
  margin-bottom: 8px;
}

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

.page-about .about-eco-note {
  margin: 20px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-dim);
}

.page-about .about-eco-note a {
  color: var(--ink-2);
  text-decoration: underline;
  text-decoration-color: var(--gold-60);
  text-underline-offset: 3px;
}

.page-about .about-eco-note a:hover {
  color: var(--jade);
}

/* ---------- 为什么选我们 ---------- */
.page-about .about-why {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  padding: clamp(24px, 4vw, 46px);
  background: linear-gradient(158deg, var(--ink) 0%, var(--ink-2) 100%);
  color: var(--porcelain);
}

.page-about .about-why::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -110px;
  width: clamp(200px, 30vw, 340px);
  aspect-ratio: 1 / 1;
  border-radius: 48% 52% 40% 60% / 56% 44% 56% 44%;
  background: radial-gradient(circle at 40% 40%, rgba(201, 164, 92, .28), transparent 68%);
  pointer-events: none;
}

.page-about .about-why .about-label {
  background: rgba(247, 243, 234, .10);
  color: var(--gold);
  border-left-color: var(--amber);
}

.page-about .about-why h2 {
  color: var(--porcelain);
  position: relative;
  z-index: 1;
}

.page-about .about-why-lede {
  margin: 0 0 24px;
  font-size: clamp(15px, 1.25vw, 17px);
  line-height: 1.8;
  color: var(--porcelain-85);
  max-width: 56ch;
  position: relative;
  z-index: 1;
}

.page-about .about-reasons {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
  position: relative;
  z-index: 1;
}

.page-about .about-reasons li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid rgba(247, 243, 234, .18);
}

.page-about .about-reason-num {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gold);
  padding-top: 4px;
}

.page-about .about-reasons p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--porcelain-85);
}

.page-about .about-why-actions {
  margin-top: 28px;
  position: relative;
  z-index: 1;
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 820px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: clamp(34px, 4.6vw, 68px);
  }

  .page-about .about-team-head {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    align-items: center;
  }

  .page-about .about-coverage {
    grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-reasons {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 28px;
  }
}

@media (min-width: 860px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-timeline > li {
    border-left: 0;
    border-top: 1px solid var(--gold-35);
    padding: 28px 16px 0 0;
  }

  .page-about .about-timeline > li::before {
    left: 0;
    top: -5px;
  }
}

@media (min-width: 960px) {
  .page-about .about-shell {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(36px, 4.6vw, 76px);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }

  .page-about .about-index-list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }

  .page-about .about-index-list a {
    display: flex;
    padding: 8px 0;
    border-bottom: 1px solid rgba(14, 42, 36, .08);
  }

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

@media (min-width: 1180px) {
  .page-about .about-hero-figure {
    aspect-ratio: 6 / 5;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team-card,
  .page-about .about-side-note,
  .page-about .about-index-list a {
    transition: none;
  }

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