.page-about {
  --about-rule: rgba(107, 103, 93, 0.26);
  --about-rule-soft: rgba(107, 103, 93, 0.14);
  --about-rule-light: rgba(230, 210, 166, 0.28);
  --about-on-green: rgba(246, 243, 234, 0.78);
  --about-on-green-dim: rgba(246, 243, 234, 0.6);
  background: var(--porcelain);
  color: var(--ink);
  font-family: var(--sans);
  overflow-x: clip;
}

.page-about h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(23px, 3.4vw, 36px);
  line-height: 1.34;
  letter-spacing: 0.02em;
  margin: 10px 0 16px;
  color: var(--green);
}

.page-about h3 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.45;
  margin: 0 0 8px;
  color: var(--ink);
}

.page-about p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.75;
  max-width: 68ch;
}

.page-about .media {
  display: block;
  overflow: hidden;
  background: var(--green);
}

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

.page-about .about-link {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  padding-bottom: 1px;
  transition: color 0.24s var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--clay);
}

.page-about .eyebrow--light {
  color: var(--gold-light);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 4vw, 40px) 0 clamp(38px, 6vw, 76px);
  background:
    radial-gradient(120% 90% at 88% 6%, rgba(201, 164, 92, 0.16), transparent 62%),
    linear-gradient(180deg, var(--green) 0%, var(--green) 62%, var(--ink-deep) 100%);
  color: var(--porcelain);
}

.page-about .about-hero .breadcrumb__link,
.page-about .about-hero .breadcrumb__current {
  color: var(--about-on-green-dim);
}

.page-about .about-hero .breadcrumb__link:hover {
  color: var(--gold-light);
}

.page-about .about-hero__frame {
  position: relative;
  margin-top: clamp(18px, 3vw, 30px);
  padding: clamp(20px, 4vw, 48px);
  border: 1px solid var(--about-rule-light);
}

.page-about .about-hero__frame::before,
.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  width: 15px;
  height: 15px;
  border: 1px solid var(--gold);
}

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

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

.page-about .about-hero__title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(30px, 6vw, 58px);
  line-height: 1.16;
  letter-spacing: 0.02em;
  margin: 14px 0 0;
  color: var(--porcelain);
  max-width: 18ch;
}

.page-about .about-hero__lead {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--about-on-green);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: clamp(18px, 3vw, 26px) 0 0;
  border-top: 1px solid var(--about-rule-light);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 16px;
}

.page-about .about-stat__v {
  display: block;
  font-family: var(--mono);
  font-size: clamp(22px, 3.6vw, 34px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--gold);
}

.page-about .about-stat__k {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.5;
  color: var(--about-on-green-dim);
}

/* ---------- 编年长文 ---------- */
.page-about .about-chronicle {
  padding-top: clamp(40px, 7vw, 88px);
  padding-bottom: clamp(40px, 7vw, 88px);
}

.page-about .about-chronicle__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
}

.page-about .about-index__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0 4px;
}

.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 12px 8px 13px;
  border-left: 1px solid var(--about-rule);
  font-size: 13px;
  line-height: 1.5;
  color: var(--stone);
  text-decoration: none;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--ink);
}

.page-about .about-index__link.is-active {
  color: var(--green);
  border-left: 2px solid var(--gold);
  padding-left: 12px;
}

.page-about .about-index__num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--clay);
}

.page-about .about-copy p {
  color: #2b2723;
}

.page-about .about-figure {
  margin: clamp(24px, 3.5vw, 36px) 0;
}

.page-about .about-figure__cap {
  display: block;
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  line-height: 1.6;
  color: var(--stone);
}

.page-about .timeline {
  list-style: none;
  margin: clamp(24px, 3.5vw, 36px) 0 0;
  padding: 0;
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 clamp(26px, 4vw, 42px) clamp(20px, 3vw, 30px);
  border-left: 1px solid var(--about-rule);
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 8px;
  width: 7px;
  height: 7px;
  background: var(--gold);
}

.page-about .timeline__year {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.12em;
}

.page-about .timeline__title {
  margin: 8px 0 8px;
}

.page-about .timeline__item p {
  margin-bottom: 0;
  font-size: 16px;
  color: #2b2723;
}

.page-about .about-quote {
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 6px 0 6px clamp(16px, 2.4vw, 24px);
  border-left: 3px solid var(--gold);
}

.page-about .about-quote p {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(19px, 2.8vw, 27px);
  line-height: 1.55;
  color: var(--green);
  max-width: 26ch;
}

/* ---------- 片区与队伍 ---------- */
.page-about .about-team {
  background: var(--porcelain-deep);
  padding-top: clamp(40px, 7vw, 88px);
  padding-bottom: clamp(40px, 7vw, 88px);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
}

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

.page-about .about-team__label {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--stone);
}

.page-about .zone-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

.page-about .zone-list__item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px solid var(--about-rule);
  font-family: var(--serif);
  font-size: 17px;
  color: var(--green);
}

.page-about .zone-list__item:first-child {
  border-top: 1px solid var(--about-rule);
}

.page-about .zone-list__num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--clay);
}

.page-about .about-team__numbers {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
  padding-top: 18px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-num__v {
  display: block;
  font-family: var(--mono);
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.1;
  color: var(--clay);
}

.page-about .about-num__k {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--stone);
}

/* ---------- 标准手册 ---------- */
.page-about .about-standard {
  background: linear-gradient(160deg, var(--green) 0%, var(--ink-deep) 100%);
  color: var(--porcelain);
  padding-top: clamp(40px, 7vw, 88px);
  padding-bottom: clamp(40px, 7vw, 88px);
}

.page-about .about-standard h2 {
  color: var(--porcelain);
}

.page-about .about-standard__lead {
  color: var(--about-on-green);
  max-width: 62ch;
}

.page-about .about-standard__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
  margin-top: clamp(24px, 3.5vw, 36px);
}

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

.page-about .about-standard .about-figure__cap {
  color: var(--about-on-green-dim);
}

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

.page-about .steps__item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 4px 10px;
  padding: 16px 0;
  border-top: 1px solid var(--about-rule-light);
}

.page-about .steps__item:last-child {
  border-bottom: 1px solid var(--about-rule-light);
}

.page-about .steps__num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
  padding-top: 5px;
}

.page-about .steps__title {
  color: var(--porcelain);
  font-size: 17px;
  margin-bottom: 4px;
}

.page-about .steps__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--about-on-green);
}

/* ---------- 运营质量 ---------- */
.page-about .about-quality {
  padding-top: clamp(40px, 7vw, 88px);
  padding-bottom: clamp(40px, 7vw, 88px);
}

.page-about .about-quality__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-about .rings {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(18px, 3.4vw, 38px);
  margin: clamp(22px, 3vw, 32px) 0 clamp(24px, 3.4vw, 34px);
}

.page-about .ring {
  margin: 0;
  flex: 1 1 118px;
  max-width: 158px;
}

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

.page-about .ring__track {
  stroke: rgba(107, 103, 93, 0.18);
}

.page-about .ring__bar {
  stroke: var(--gold);
  stroke-linecap: butt;
}

.page-about .ring__cap {
  display: block;
  margin-top: 10px;
}

.page-about .ring__num {
  display: block;
  font-family: var(--mono);
  font-size: 21px;
  line-height: 1.2;
  color: var(--green);
}

.page-about .ring__label {
  display: block;
  margin-top: 3px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--stone);
}

.page-about .about-details {
  margin-top: clamp(18px, 2.6vw, 26px);
  padding: 14px 0;
  border-top: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-details summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.5;
  color: var(--green);
}

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

.page-about .about-details summary::after {
  content: "+";
  font-family: var(--mono);
  font-size: 18px;
  color: var(--gold);
  flex: none;
}

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

.page-about .about-details__list {
  margin: 14px 0 0;
  padding-left: 18px;
}

.page-about .about-details__list li {
  margin-bottom: 7px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--stone);
}

.page-about .about-details__list li:last-child {
  margin-bottom: 0;
}

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

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  background: var(--porcelain-deep);
  padding-top: clamp(40px, 7vw, 88px);
  padding-bottom: clamp(40px, 7vw, 88px);
}

.page-about .about-eco__lead {
  color: #2b2723;
  max-width: 64ch;
}

.page-about .about-eco__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0 clamp(24px, 4vw, 48px);
  margin-top: clamp(22px, 3.4vw, 34px);
}

.page-about .about-eco__block {
  padding: 22px 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-eco__num {
  display: block;
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1;
  margin-bottom: 12px;
}

.page-about .about-eco__block p {
  font-size: 15px;
  color: #2b2723;
  margin-bottom: 0;
}

.page-about .about-eco__block--note {
  border-top: 2px solid var(--clay);
}

.page-about .about-eco__more {
  margin-top: 10px;
}

/* ---------- 三件坚持 ---------- */
.page-about .about-commit {
  padding-top: clamp(40px, 7vw, 88px);
  padding-bottom: clamp(40px, 7vw, 88px);
}

.page-about .commit-list {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .commit-list__item {
  padding: clamp(18px, 2.8vw, 26px) 0 clamp(18px, 2.8vw, 24px);
  border-top: 2px solid var(--gold);
}

.page-about .commit-list__num {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--clay);
  margin-bottom: 8px;
}

.page-about .commit-list__title {
  margin-bottom: 8px;
}

.page-about .commit-list__item p {
  margin: 0;
  font-size: 15px;
  color: #2b2723;
}

.page-about .about-commit__foot {
  margin-top: clamp(22px, 3vw, 32px);
  margin-bottom: 0;
  padding-top: 18px;
  border-top: 1px solid var(--about-rule);
  font-size: 15px;
  color: var(--stone);
  max-width: 70ch;
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding: clamp(42px, 7vw, 82px) 0;
  background:
    radial-gradient(90% 120% at 12% 0%, rgba(201, 164, 92, 0.18), transparent 64%),
    var(--ink-deep);
  color: var(--porcelain);
}

.page-about .about-cta h2 {
  color: var(--porcelain);
  max-width: 20ch;
}

.page-about .about-cta p {
  color: var(--about-on-green);
  max-width: 62ch;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 24px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .about-cta__link {
  color: var(--gold-light);
  text-decoration: none;
  font-size: 15px;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--about-rule-light);
  transition: color 0.24s var(--ease);
}

.page-about .about-cta__link:hover,
.page-about .about-cta__link:focus-visible {
  color: var(--gold);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-eco__block {
    padding: 24px 0 28px;
  }

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

@media (min-width: 860px) {
  .page-about .commit-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .commit-list__item {
    padding-right: clamp(16px, 2.4vw, 30px);
  }

  .page-about .commit-list__item:last-child {
    padding-right: 0;
  }

  .page-about .about-index__list {
    display: block;
  }

  .page-about .about-index__link {
    padding: 9px 0 9px 13px;
  }
}

@media (min-width: 960px) {
  .page-about .about-chronicle__layout {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--rail-h) + var(--bar-h) + 24px);
    align-self: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: 7fr 5fr;
  }

  .page-about .about-standard__grid {
    grid-template-columns: 5fr 7fr;
  }

  .page-about .about-quality__grid {
    grid-template-columns: 7fr 5fr;
  }

  .page-about .about-quality__figure {
    position: sticky;
    top: calc(var(--rail-h) + var(--bar-h) + 24px);
  }

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

  .page-about .about-eco__block--note {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-link,
  .page-about .about-index__link,
  .page-about .about-cta__link {
    transition: none;
  }
}
<<<END>>>