.page-about {
  --about-panel: #FCF8F0;
  --about-rule: rgba(14, 42, 71, .12);
  --about-body: #3B322B;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 1.85;
  overflow-x: hidden;
}

/* ---------- 封面 ---------- */
.page-about__cover {
  position: relative;
  padding: calc(var(--header-h) + 44px) 0 60px;
  color: var(--cream);
  background:
    radial-gradient(130% 100% at 88% -12%, rgba(184, 115, 51, .34) 0%, rgba(184, 115, 51, 0) 58%),
    linear-gradient(158deg, var(--navy) 0%, var(--navy-deep) 100%);
}
.page-about__cover::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--copper) 0%, var(--amber) 40%, rgba(184, 115, 51, .06) 100%);
}
.page-about__cover-inner {
  display: grid;
  gap: 34px;
  align-items: end;
}
.page-about__crumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
}
.page-about__crumbs .crumbs__link {
  color: var(--copper-lit);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}
.page-about__crumbs .crumbs__link:hover {
  color: var(--cream);
  border-bottom-color: var(--copper-lit);
}
.page-about__crumbs .crumbs__sep { color: rgba(245, 239, 227, .45); }
.page-about__crumbs .crumbs__item { color: rgba(245, 239, 227, .82); }

.page-about .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .14em;
  color: var(--copper-lit);
}
.page-about__cover h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 6.4vw, 60px);
  line-height: 1.08;
  letter-spacing: -.01em;
  color: #FFFFFF;
  max-width: 16ch;
}
.page-about__lede {
  margin: 0 0 30px;
  padding-left: 18px;
  border-left: 2px solid rgba(184, 115, 51, .6);
  font-family: var(--font-serif);
  font-size: clamp(16px, 1.9vw, 18px);
  line-height: 1.9;
  color: rgba(245, 239, 227, .88);
  max-width: 48ch;
}
.page-about__cover-index {
  list-style: none;
  margin: 0;
  padding: 18px 0 0;
  border-top: 1px solid rgba(245, 239, 227, .2);
  display: grid;
  gap: 0;
  max-width: 46ch;
}
.page-about__cover-index li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  padding: 9px 0;
  border-bottom: 1px solid rgba(245, 239, 227, .12);
}
.page-about__ci-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--amber);
}
.page-about__ci-label {
  font-size: 14.5px;
  color: rgba(245, 239, 227, .74);
}
.page-about__ci-val {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 14.5px;
  color: #FFFFFF;
}
.page-about__cover-media {
  margin: 0;
  border: 1px solid rgba(184, 115, 51, .5);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, .22);
}
.page-about__cover-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

@media (min-width: 960px) {
  .page-about__cover { padding: calc(var(--header-h) + 56px) 0 76px; }
  .page-about__cover-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
  }
}

/* ---------- 主体骨架 ---------- */
.page-about__body { padding: 54px 0 76px; }
.page-about__layout { display: grid; gap: 26px; }
.page-about__index { min-width: 0; }
.page-about__index-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--mist);
}
.page-about .anchor-nav {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 12px 0 4px;
  border-top: var(--copper-line);
  scrollbar-width: none;
}
.page-about .anchor-nav::-webkit-scrollbar { display: none; }
.page-about .anchor-nav__link {
  flex: 0 0 auto;
  padding: 6px 10px;
  border: 1px solid transparent;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--navy);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--ease), border-color var(--ease), background var(--ease);
}
.page-about .anchor-nav__link:hover {
  color: var(--copper);
  border-color: rgba(184, 115, 51, .42);
}
.page-about .anchor-nav__link.is-active {
  color: var(--copper);
  background: rgba(184, 115, 51, .1);
  border-color: rgba(184, 115, 51, .48);
}

@media (min-width: 940px) {
  .page-about__layout {
    grid-template-columns: 186px minmax(0, 1fr);
    gap: 52px;
  }
  .page-about__index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    align-self: start;
  }
  .page-about .anchor-nav {
    flex-direction: column;
    overflow: visible;
    gap: 0;
    padding-top: 14px;
  }
  .page-about .anchor-nav__link {
    padding: 9px 0 9px 13px;
    border: 0;
    border-left: 2px solid transparent;
    background: none;
    white-space: normal;
  }
  .page-about .anchor-nav__link:hover {
    border-left-color: rgba(184, 115, 51, .45);
    background: none;
  }
  .page-about .anchor-nav__link.is-active {
    border-left-color: var(--copper);
    background: linear-gradient(90deg, rgba(184, 115, 51, .14), rgba(184, 115, 51, 0));
  }
}

/* ---------- 堆叠面板 ---------- */
.page-about__column { min-width: 0; }
.page-about__panel {
  margin-bottom: 34px;
  background: var(--about-panel);
  border: var(--line);
  border-top: 3px solid var(--copper);
  box-shadow: var(--stack);
  transition: transform var(--ease), box-shadow var(--ease);
}
.page-about__panel:hover {
  transform: translateY(-2px);
  box-shadow: 4px 6px 0 rgba(14, 42, 71, .1), 8px 12px 0 rgba(14, 42, 71, .05);
}
.page-about__panel:last-child { margin-bottom: 0; }
.page-about__panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 16px;
  padding: 20px 22px 16px;
  border-bottom: 1px solid var(--about-rule);
  background: linear-gradient(180deg, rgba(14, 42, 71, .045), rgba(14, 42, 71, 0));
}
.page-about__panel-num {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--copper);
}
.page-about__panel-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.7vw, 27px);
  line-height: 1.28;
  letter-spacing: -.005em;
  color: var(--navy);
}
.page-about__panel-tag { margin-left: auto; }
.page-about__panel-body { padding: 24px 22px 28px; }

@media (min-width: 700px) {
  .page-about__panel-head { padding: 22px 30px 18px; }
  .page-about__panel-body { padding: 28px 30px 34px; }
}
@media (max-width: 619px) {
  .page-about__panel-tag { margin-left: 0; }
}

/* ---------- 通用文本 ---------- */
.page-about .prose {
  max-width: 68ch;
  margin: 0;
  min-width: 0;
}
.page-about .prose p {
  margin: 0 0 14px;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--about-body);
}
.page-about .prose p:last-child { margin-bottom: 0; }
.page-about .prose a {
  color: var(--copper);
  text-decoration: none;
  border-bottom: 1px solid rgba(184, 115, 51, .42);
  transition: color var(--ease), border-color var(--ease);
}
.page-about .prose a:hover {
  color: var(--amber);
  border-bottom-color: var(--amber);
}
.page-about__lead {
  margin: 0 0 22px;
  padding-bottom: 18px;
  border-bottom: 1px dashed rgba(14, 42, 71, .2);
  font-family: var(--font-serif);
  font-size: clamp(17px, 2vw, 19px);
  line-height: 1.82;
  color: var(--navy);
  max-width: 62ch;
}
.page-about__subhead {
  margin: 26px 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17.5px;
  letter-spacing: .01em;
  color: var(--copper);
}
.page-about__note {
  margin: 26px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--about-rule);
  font-size: 15px;
  line-height: 1.85;
  color: #4E453C;
  max-width: 72ch;
}
.page-about__note a {
  color: var(--copper);
  text-decoration: none;
  border-bottom: 1px solid rgba(184, 115, 51, .42);
}
.page-about__note a:hover { color: var(--amber); border-bottom-color: var(--amber); }

/* ---------- 两栏分割 ---------- */
.page-about__split { display: grid; gap: 26px; }
@media (min-width: 820px) {
  .page-about__split {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 36px;
  }
}

/* ---------- 事实列表 ---------- */
.page-about__facts {
  list-style: none;
  margin: 0;
  padding: 18px 20px;
  align-self: start;
  background: var(--paper);
  border-left: 3px solid var(--copper);
  display: grid;
  gap: 14px;
}
.page-about__facts li {
  display: grid;
  gap: 2px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(14, 42, 71, .12);
}
.page-about__facts li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.page-about__facts-num {
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1.25;
  color: var(--navy);
}
.page-about__facts-label {
  font-size: 14px;
  line-height: 1.7;
  color: #4E453C;
}
.page-about__facts--wide {
  grid-template-columns: 1fr;
  margin: 0 0 24px;
}
@media (min-width: 760px) {
  .page-about__facts--wide { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
  .page-about__facts--wide li { padding-bottom: 0; border-bottom: 0; }
}

/* ---------- 时间线 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 0 0 4px;
  padding: 0;
  display: grid;
  gap: 0;
}
.page-about .timeline__item {
  position: relative;
  padding: 0 0 26px 30px;
  border-left: 2px solid rgba(184, 115, 51, .35);
}
.page-about .timeline__item:last-child { padding-bottom: 0; }
.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -9px;
  top: 5px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--copper);
  box-shadow: 0 0 0 3px var(--about-panel);
}
.page-about .timeline__item--current::before {
  background: var(--amber);
  box-shadow: 0 0 0 3px var(--about-panel), 0 0 0 8px rgba(226, 112, 58, .16);
}
.page-about .timeline__time {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--copper);
}
.page-about .timeline__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18.5px;
  line-height: 1.32;
  color: var(--navy);
}
.page-about .timeline__desc {
  margin: 0;
  max-width: 42ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-body);
}
@media (min-width: 860px) {
  .page-about .timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 20px;
    margin-bottom: 10px;
  }
  .page-about .timeline__item {
    padding: 40px 0 0;
    border-left: 0;
  }
  .page-about .timeline__item::after {
    content: "";
    position: absolute;
    left: 16px;
    right: -20px;
    top: 9px;
    height: 2px;
    background: rgba(184, 115, 51, .35);
  }
  .page-about .timeline__item:last-child::after {
    right: 0;
    background: linear-gradient(90deg, rgba(184, 115, 51, .35), rgba(184, 115, 51, 0));
  }
  .page-about .timeline__item::before {
    left: 0;
    top: 2px;
  }
  .page-about .timeline__desc { max-width: none; }
}

/* ---------- 资质对照表 ---------- */
.page-about__matrix-wrap {
  overflow-x: auto;
  margin: 0 0 6px;
  padding-bottom: 6px;
}
.page-about__matrix {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
}
.page-about__matrix-caption {
  caption-side: top;
  text-align: left;
  padding: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mist);
}
.page-about__matrix thead th {
  padding: 10px 8px;
  border-bottom: 2px solid rgba(14, 42, 71, .35);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--navy);
  text-align: center;
}
.page-about__matrix thead th:first-child { text-align: left; }
.page-about__matrix tbody th,
.page-about__matrix tbody td {
  padding: 11px 8px;
  border-bottom: 1px solid rgba(14, 42, 71, .09);
  text-align: center;
  font-weight: 400;
  font-size: 14.5px;
}
.page-about__matrix tbody th {
  text-align: left;
  font-family: var(--font-serif);
  color: var(--ink);
}
.page-about__matrix tbody tr:nth-child(even) { background: var(--paper); }
.page-about__matrix tbody tr:hover { background: rgba(184, 115, 51, .1); }
.page-about__dot {
  display: inline-block;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--celadon);
  vertical-align: middle;
}
.page-about__dash {
  font-family: var(--font-mono);
  color: var(--mist);
}
.page-about__legend {
  margin: 12px 0 24px;
  font-size: 13.5px;
  line-height: 2;
  color: #544A41;
}
.page-about__legend .page-about__dot { margin-right: 6px; }
.page-about__legend .page-about__dash { margin-left: 14px; }

/* ---------- 团队 ---------- */
.page-about__team { display: grid; gap: 26px; }
.page-about__team-media {
  margin: 0;
  border: var(--line);
  box-shadow: var(--stack);
}
.page-about__team-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about__donut-wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
}
.page-about__donut {
  flex: 0 0 auto;
  width: min(190px, 54vw);
  height: auto;
}
.page-about__team-list {
  flex: 1 1 190px;
  min-width: 0;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about__team-list li {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding-bottom: 9px;
  border-bottom: 1px solid rgba(14, 42, 71, .1);
  font-size: 15px;
}
.page-about__sw {
  width: 14px;
  height: 14px;
  border-radius: 3px;
}
.page-about__sw--navy { background: var(--navy); }
.page-about__sw--copper { background: var(--copper); }
.page-about__sw--celadon { background: var(--celadon); }
.page-about__sw--lit { background: var(--copper-lit); }
.page-about__team-count {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--navy);
}
@media (min-width: 880px) {
  .page-about__team {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }
}

/* ---------- 节点城市 ---------- */
.page-about__nodes {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fill, minmax(148px, 1fr));
}
.page-about__node {
  padding: 14px 16px;
  background: var(--paper);
  border: 1px solid rgba(14, 42, 71, .1);
}
.page-about__node--main {
  background: linear-gradient(150deg, var(--navy) 0%, var(--navy-deep) 100%);
  border-color: var(--navy);
}
.page-about__node-city {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.4;
  color: var(--navy);
}
.page-about__node--main .page-about__node-city { color: #FFFFFF; }
.page-about__node-note {
  display: block;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  color: #6C6259;
}
.page-about__node--main .page-about__node-note { color: var(--copper-lit); }
.page-about__node-media {
  margin: 26px 0 0;
  border: var(--line);
  box-shadow: var(--stack);
}
.page-about__node-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 收尾 ---------- */
.page-about__pledge {
  margin: 26px 0 0;
  padding: 18px 22px;
  background: rgba(184, 115, 51, .09);
  border-left: 3px solid var(--copper);
  font-family: var(--font-serif);
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.8;
  color: var(--navy);
  max-width: 60ch;
}
.page-about__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 420px) {
  .page-about__cover h1 { font-size: 30px; }
  .page-about__lede { padding-left: 14px; }
  .page-about__panel-head,
  .page-about__panel-body { padding-left: 18px; padding-right: 18px; }
  .page-about__facts { padding: 16px; }
  .page-about__pledge { padding: 16px 16px; }
}