.page-about {
  --about-line: rgba(168, 132, 44, .3);
  --about-line-soft: rgba(168, 132, 44, .16);
  --about-paper-line: rgba(245, 242, 233, .22);
  background: var(--felt);
  color: var(--paper-soft);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.75;
  padding-bottom: clamp(48px, 7vw, 96px);
  overflow-x: clip;
}

.page-about .measure {
  max-width: 68ch;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-top: clamp(20px, 3vw, 34px);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: .08em;
  color: var(--stone);
}

.page-about .breadcrumb ul {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--about-line);
}

.page-about .breadcrumb a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-about .breadcrumb a:hover {
  color: var(--gold-bright);
  border-bottom-color: var(--gold-bright);
}

.page-about .breadcrumb [aria-current="page"] {
  color: var(--stone);
}

/* ---------- 首屏 ---------- */
.page-about .about-intro {
  padding: clamp(24px, 4vw, 48px) 0 clamp(36px, 5.5vw, 68px);
  border-bottom: 1px solid var(--rule-soft);
}

.page-about .about-intro h1 {
  margin: 16px 0 0;
  max-width: 21ch;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: clamp(29px, 5.4vw, 52px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-intro__lede {
  margin: 22px 0 0;
  font-size: clamp(16px, 1.5vw, 18.5px);
  color: var(--paper-soft);
}

.page-about .about-intro__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-line-soft);
  border-left: 1px solid var(--about-line-soft);
}

.page-about .about-intro__facts li {
  padding: 15px 16px 17px;
  border-right: 1px solid var(--about-line-soft);
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .about-intro__num {
  display: block;
  font-size: var(--fs-md);
  line-height: 1.2;
  color: var(--gold-bright);
}

.page-about .about-intro__txt {
  display: block;
  margin-top: 6px;
  font-size: var(--fs-sm);
  color: var(--stone);
}

/* ---------- 目录 ---------- */
.page-about .toc {
  margin-top: clamp(30px, 4.5vw, 50px);
}

.page-about .toc ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .toc a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 3px 0;
  font-size: var(--fs-sm);
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--about-line);
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-about .toc a:hover {
  color: var(--gold-bright);
  border-bottom-color: var(--gold-bright);
}

.page-about .toc .mono {
  font-size: var(--fs-xs);
  color: var(--stone);
}

/* ---------- 章节骨架 ---------- */
.page-about .chapter {
  position: relative;
  padding: clamp(42px, 6.5vw, 84px) 0;
  border-bottom: 1px solid var(--rule-soft);
}

.page-about .chapter:last-of-type {
  border-bottom: 0;
}

.page-about .chapter + .chapter::before {
  content: "";
  display: block;
  width: clamp(40px, 10vw, 132px);
  height: 2px;
  margin: 0 0 clamp(22px, 3.5vw, 36px);
  background: var(--paper);
  opacity: .32;
}

.page-about .chapter__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "num title"
    "note note";
  gap: 4px 14px;
  align-items: baseline;
  padding-bottom: 16px;
  margin-bottom: clamp(24px, 3.6vw, 40px);
  border-bottom: 1px solid var(--about-line);
}

.page-about .chapter__num {
  grid-area: num;
  font-size: var(--fs-sm);
  letter-spacing: .1em;
  color: var(--gold);
  text-decoration: none;
  transition: color .16s var(--ease);
}

.page-about .chapter__num:hover {
  color: var(--gold-bright);
}

.page-about .chapter__title {
  grid-area: title;
  margin: 0;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: clamp(21px, 3vw, 31px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .chapter__note {
  grid-area: note;
  font-size: var(--fs-xs);
  letter-spacing: .08em;
  color: var(--stone);
}

.page-about .chapter__lede {
  margin: 0 0 clamp(24px, 3.4vw, 36px);
  font-size: var(--fs-base);
  color: var(--paper-soft);
}

/* ---------- 01 三类内容服务 ---------- */
.page-about .svc {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 44px);
}

.page-about .svc__list {
  display: grid;
  gap: clamp(22px, 3vw, 32px);
}

.page-about .svc__item {
  padding-left: 18px;
  border-left: 1px solid var(--about-line);
}

.page-about .svc__item h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: var(--fs-md);
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--gold-bright);
}

.page-about .svc__item p {
  margin: 0 0 12px;
  font-size: var(--fs-base);
  color: var(--paper-soft);
}

.page-about .svc__links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 22px;
  font-size: var(--fs-sm);
}

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

/* ---------- 通用影像容器 ---------- */
.page-about .media-frame {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: var(--felt-deep);
  border: 1px solid var(--about-line);
}

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

.page-about .media-frame--tall {
  aspect-ratio: 4 / 5;
}

.page-about .media-frame--wide {
  aspect-ratio: 14 / 9;
}

.page-about .media-frame--std {
  aspect-ratio: 3 / 2;
}

.page-about .media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 26px 16px 12px;
  font-size: var(--fs-xs);
  line-height: 1.6;
  color: var(--paper);
  background: linear-gradient(180deg, rgba(10, 15, 13, 0) 0%, rgba(10, 15, 13, .88) 100%);
}

/* ---------- 02 时间轴 ---------- */
.page-about .timeline {
  margin: 0;
  padding: 0 0 0 20px;
  list-style: none;
  border-left: 1px solid var(--about-line);
}

.page-about .timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 0 0 clamp(28px, 4vw, 44px);
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--felt);
  border: 1px solid var(--gold-bright);
  transform: rotate(45deg);
}

.page-about .timeline__stamp {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .timeline__num {
  font-size: var(--fs-xs);
  letter-spacing: .1em;
  color: var(--gold);
}

.page-about .timeline__year {
  font-size: var(--fs-md);
  line-height: 1.2;
  color: var(--gold-bright);
}

.page-about .timeline__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: var(--fs-md);
  line-height: 1.35;
  color: var(--paper);
}

.page-about .timeline__body p {
  margin: 0;
  max-width: 64ch;
  font-size: var(--fs-base);
  color: var(--paper-soft);
}

/* ---------- 03 团队分工 ---------- */
.page-about .team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-line-soft);
  border-left: 1px solid var(--about-line-soft);
}

.page-about .team > li {
  padding: 20px 20px 24px;
  border-right: 1px solid var(--about-line-soft);
  border-bottom: 1px solid var(--about-line-soft);
  transition: background-color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .team > li:hover {
  background: rgba(27, 74, 60, .5);
  border-color: var(--gold);
}

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

.page-about .team__idx {
  font-size: var(--fs-xs);
  letter-spacing: .1em;
  color: var(--gold);
}

.page-about .team__name {
  margin: 0;
  flex: 1 1 auto;
  font-family: var(--font-head);
  font-size: var(--fs-md);
  line-height: 1.3;
  color: var(--paper);
}

.page-about .team__count {
  font-size: var(--fs-sm);
  color: var(--gold-bright);
}

.page-about .team__desc {
  margin: 12px 0 0;
  font-size: var(--fs-sm);
  line-height: 1.72;
  color: var(--paper-soft);
}

.page-about .team__cells {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 16px;
}

.page-about .team__cells span {
  width: 12px;
  height: 12px;
  background: var(--felt-lift);
  border: 1px solid var(--gold);
  transition: background-color .18s var(--ease);
}

.page-about .team > li:hover .team__cells span {
  background: var(--gold);
}

.page-about .team-media {
  margin-top: clamp(28px, 4vw, 44px);
}

/* ---------- 04 数据块 ---------- */
.page-about .metrics {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .metric {
  background: var(--felt-deep);
  border: 1px solid var(--about-line-soft);
  transition: border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-about .metric[open] {
  background: var(--felt-lift);
  border-color: var(--gold);
}

.page-about .metric summary {
  position: relative;
  display: block;
  padding: 20px 46px 18px 20px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .metric summary::after {
  content: "+";
  position: absolute;
  top: 16px;
  right: 18px;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--gold);
}

.page-about .metric[open] summary::after {
  content: "\2212";
  color: var(--gold-bright);
}

.page-about .metric__value {
  display: block;
  font-size: clamp(25px, 4vw, 33px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--gold-bright);
}

.page-about .metric__value small {
  font-size: .48em;
  margin-left: 3px;
  color: var(--gold);
}

.page-about .metric__label {
  display: block;
  margin-top: 8px;
  font-size: var(--fs-sm);
  color: var(--stone);
}

.page-about .metric .fold__body {
  padding: 0 20px 20px;
  font-size: var(--fs-sm);
  line-height: 1.72;
  color: var(--paper-soft);
}

.page-about .metric .fold__body p {
  margin: 0;
}

/* ---------- 05 合作共建 ---------- */
.page-about .partners-media {
  margin-bottom: clamp(24px, 3.6vw, 38px);
}

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

.page-about .flow li {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 16px 16px 0;
  border-left: 2px solid transparent;
  border-bottom: 1px solid var(--about-line-soft);
  transition: border-left-color .18s var(--ease), background-color .18s var(--ease);
}

.page-about .flow li:first-child {
  border-top: 1px solid var(--about-line-soft);
}

.page-about .flow li:hover {
  border-left-color: var(--gold-bright);
  background: rgba(27, 74, 60, .5);
}

.page-about .flow__num {
  font-size: var(--fs-sm);
  letter-spacing: .08em;
  color: var(--gold);
  padding-left: 14px;
}

.page-about .flow__body h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: var(--fs-base);
  line-height: 1.4;
  color: var(--paper);
}

.page-about .flow__body p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.72;
  color: var(--paper-soft);
}

/* ---------- 06 备案与联系 ---------- */
.page-about .reg {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  border-top: 1px solid var(--about-line-soft);
}

.page-about .reg__item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  padding: 18px 0;
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .reg__label {
  font-size: var(--fs-xs);
  letter-spacing: .1em;
  color: var(--stone);
}

.page-about .reg__value {
  font-size: var(--fs-base);
  color: var(--gold-bright);
  word-break: break-all;
}

.page-about .copy-btn {
  margin-top: 2px;
  padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: .06em;
  color: var(--gold);
  background: transparent;
  border: 1px solid var(--about-line);
  border-radius: 2px;
  cursor: pointer;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-about .copy-btn:hover {
  color: var(--gold-bright);
  border-color: var(--gold-bright);
}

.page-about .reg__more {
  margin: clamp(24px, 3.4vw, 34px) 0 0;
  max-width: 68ch;
  font-size: var(--fs-sm);
  line-height: 1.78;
  color: var(--stone);
}

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

  .page-about .timeline__item {
    grid-template-columns: 116px minmax(0, 1fr);
    gap: 0 26px;
  }

  .page-about .timeline__stamp {
    flex-direction: column;
    gap: 3px;
  }

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

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

  .page-about .reg {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 40px;
  }
}

@media (min-width: 900px) {
  .page-about .svc {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: clamp(32px, 4vw, 56px);
  }

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

  .page-about .chapter__head {
    grid-template-columns: auto minmax(0, 1fr) auto;
    grid-template-areas: "num title note";
    gap: 0 18px;
  }

  .page-about .flow li {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 20px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-intro h1 {
    max-width: 19ch;
  }
}

/* ---------- 打印 ---------- */
@media print {
  .page-about {
    background: #fff;
    color: #1a1a1a;
  }

  .page-about .about-intro h1,
  .page-about .chapter__title,
  .page-about .svc__item h3,
  .page-about .timeline__body h3,
  .page-about .team__name,
  .page-about .flow__body h3 {
    color: #111;
  }

  .page-about .about-intro__num,
  .page-about .metric__value,
  .page-about .reg__value,
  .page-about .timeline__year {
    color: #6b5416;
  }

  .page-about .timeline,
  .page-about .team,
  .page-about .flow li,
  .page-about .reg__item,
  .page-about .metric {
    border-color: #b9b3a4;
  }

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

  .page-about .svc {
    grid-template-columns: minmax(0, 1fr);
  }
}
<<<END>>>