.page-about {
  --about-rail: 196px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

/* ---- 面包屑 ---- */
.page-about .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: clamp(20px, 3vw, 34px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ink-45);
}
.page-about .crumbs a {
  color: var(--ink-70);
  text-decoration: none;
}
.page-about .crumbs a:hover { color: var(--amber-deep); }
.page-about .crumbs__sep { color: var(--line); }

/* ---- 首屏 ---- */
.page-about .about-hero {
  padding: clamp(26px, 4vw, 48px) 0 clamp(34px, 5vw, 72px);
}
.page-about .about-hero__grid {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
  align-items: end;
}
.page-about .about-hero__eyebrow {
  margin: 0;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--amber-deep);
}
.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(32px, 7vw, 58px);
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -.02em;
}
.page-about .about-hero__aside { min-width: 0; }
.page-about .about-hero__lede {
  margin: 0;
  font-size: clamp(15.5px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--ink-70);
  max-width: 46ch;
}
.page-about .fact-row {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-about .fact-chip {
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper-white);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ink-70);
}
.page-about .about-hero__actions {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 5vw, 76px);
  }
}

/* ---- 主体骨架：左侧坐标轴 + 右侧内容 ---- */
.page-about .about-shell {
  padding-bottom: clamp(52px, 7vw, 100px);
}
.page-about .about-rail { display: none; }
.page-about .about-flow { min-width: 0; }

@media (min-width: 1024px) {
  .page-about .about-shell {
    display: grid;
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 64px);
    align-items: start;
  }
  .page-about .about-rail {
    display: block;
    position: sticky;
    top: calc(var(--cmd-h-scrolled) + 28px);
  }
}

.page-about .rail__label {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--ink-45);
}
.page-about .rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--line);
}
.page-about .rail__item { position: relative; }
.page-about .rail__link {
  display: block;
  margin-left: -1px;
  padding: 9px 0 9px 18px;
  border-left: 2px solid transparent;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--ink-70);
  text-decoration: none;
  transition: color .22s var(--ease), border-color .22s var(--ease);
}
.page-about .rail__link::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 50%;
  width: 7px;
  height: 7px;
  margin-top: -3.5px;
  border-radius: 50%;
  background: var(--line);
  transition: background .22s var(--ease);
}
.page-about .rail__link:hover { color: var(--ink); }
.page-about .rail__link.is-current {
  color: var(--ink);
  font-weight: 700;
  border-left-color: var(--amber);
}
.page-about .rail__link.is-current::before { background: var(--amber); }

/* ---- 章节 ---- */
.page-about .about-sec {
  padding: clamp(36px, 5vw, 68px) 0;
  border-top: 1px solid var(--line);
}
.page-about .about-sec:first-child {
  border-top: 0;
  padding-top: clamp(10px, 2vw, 20px);
}
.page-about .sec-head { margin-bottom: clamp(20px, 3vw, 34px); }
.page-about .sec-num {
  margin: 0 0 10px;
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--amber-deep);
}
.page-about .sec-title {
  margin: 0;
  font-size: clamp(23px, 3.4vw, 34px);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -.01em;
}
.page-about .sec-body {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--ink-70);
}
.page-about .sec-body p { margin: 0 0 12px; }
.page-about .sec-body p:last-child { margin-bottom: 0; }
.page-about .sec-cols { display: grid; gap: clamp(20px, 3vw, 34px); }
@media (min-width: 860px) {
  .page-about .sec-cols {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: clamp(28px, 4vw, 52px);
  }
}
.page-about .sec-link {
  margin: 26px 0 0;
  font-size: 14.5px;
}
.page-about .sec-link a {
  color: var(--amber-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--amber-soft);
  padding-bottom: 2px;
  transition: border-color .22s var(--ease);
}
.page-about .sec-link a:hover { border-bottom-color: var(--amber); }

/* ---- 服务族列表 ---- */
.page-about .family-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}
.page-about .family-item {
  padding: 2px 0 2px 16px;
  border-left: 3px solid var(--line);
  display: grid;
  gap: 6px;
}
.page-about .family-item:nth-child(1) { border-left-color: var(--amber); }
.page-about .family-item:nth-child(2) { border-left-color: var(--celadon); }
.page-about .family-item:nth-child(3) { border-left-color: var(--navy); }
.page-about .family-item:nth-child(4) { border-left-color: var(--amber-deep); }
.page-about .family-item__tag {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--amber-deep);
}
.page-about .family-item p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-70);
}

/* ---- 数字坐标墙 ---- */
.page-about .scale-wall {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}
@media (min-width: 720px) {
  .page-about .scale-wall { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
.page-about .scale-cell {
  position: relative;
  min-width: 0;
  padding: clamp(18px, 2.4vw, 28px) clamp(16px, 2vw, 24px) clamp(16px, 2vw, 22px);
  background: var(--paper-white);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.page-about .scale-cell::after {
  content: "";
  position: absolute;
  top: 16px;
  right: 16px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--amber);
}
.page-about .scale-cell:nth-child(2n)::after { background: var(--celadon); }
.page-about .scale-cell:nth-child(3n)::after { background: var(--amber-deep); }
.page-about .scale-num {
  font-size: clamp(30px, 5.2vw, 52px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.page-about .scale-label {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--ink-70);
}

/* ---- 图 ---- */
.page-about .figure { margin: 0; }
.page-about .about-figure { margin-bottom: clamp(22px, 3vw, 34px); }
.page-about .stages-figure { margin-bottom: clamp(24px, 3.5vw, 42px); }
.page-about .figure__media {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-lg);
  background: linear-gradient(150deg, var(--navy) 0%, var(--ink) 100%);
}
.page-about .figure__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-about .figure__caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .04em;
  color: var(--ink-45);
}

/* ---- 职能展签 ---- */
.page-about .role-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
@media (min-width: 640px) {
  .page-about .role-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1080px) {
  .page-about .role-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .page-about .role-card:nth-child(even) { transform: translateY(26px); }
  .page-about .role-card:nth-child(even):hover,
  .page-about .role-card:nth-child(even):focus-within { transform: translateY(20px); }
}
.page-about .role-card {
  min-width: 0;
  padding: 20px 18px 22px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  display: grid;
  align-content: start;
  gap: 8px;
  transition: border-color .26s var(--ease), box-shadow .26s var(--ease), transform .26s var(--ease);
}
.page-about .role-card:hover,
.page-about .role-card:focus-within {
  border-color: var(--amber);
  box-shadow: 0 22px 38px -28px rgba(17, 26, 46, .55);
  transform: translateY(-6px);
}
.page-about .role-card__tag {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--celadon);
}
.page-about .role-card__title {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -.01em;
}
.page-about .role-card__count {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--amber-deep);
  font-variant-numeric: tabular-nums;
}
.page-about .role-card__body {
  margin: 4px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-70);
}

/* ---- 区域协作 ---- */
.page-about .region-wrap { display: grid; gap: clamp(22px, 3vw, 34px); }
@media (min-width: 1000px) {
  .page-about .region-wrap {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: start;
  }
}
.page-about .region-list { display: grid; gap: 16px; }
.page-about .region-band {
  padding: 4px 0 4px 16px;
  border-left: 4px solid var(--line);
}
.page-about .region-band--a { border-left-color: var(--amber); }
.page-about .region-band--b { border-left-color: var(--celadon); }
.page-about .region-band--c { border-left-color: var(--navy); }
.page-about .region-band--d { border-left-color: var(--amber-deep); }
.page-about .region-band__head {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
}
.page-about .region-band__name { font-size: 17px; font-weight: 700; }
.page-about .region-band__num {
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--ink-45);
  font-variant-numeric: tabular-nums;
}
.page-about .region-band__body {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-70);
}
.page-about .region-note {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 16px 18px;
  border-radius: var(--r-sm);
  background: var(--celadon-soft);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---- 时间轴 ---- */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  position: relative;
  display: grid;
  gap: clamp(18px, 2.6vw, 30px);
}
.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--amber) 0%, var(--celadon) 55%, var(--navy) 100%);
  opacity: .55;
}
.page-about .timeline__item { position: relative; }
.page-about .timeline__dot {
  position: absolute;
  left: -26px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--amber);
}
.page-about .timeline__item:nth-child(2) .timeline__dot { border-color: var(--amber-deep); }
.page-about .timeline__item:nth-child(3) .timeline__dot { border-color: var(--celadon); }
.page-about .timeline__item:nth-child(4) .timeline__dot {
  border-color: var(--navy);
  background: var(--celadon-soft);
}
.page-about .timeline__body { display: grid; gap: 6px; }
.page-about .timeline__tag {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--ink-45);
}
.page-about .timeline__title {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -.01em;
}
.page-about .timeline__text {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-70);
}

/* ---- 服务保证 ---- */
.page-about .assure-grid { display: grid; gap: clamp(22px, 3vw, 34px); }
@media (min-width: 960px) {
  .page-about .assure-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }
}
.page-about .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .steps__item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 4px 14px;
  padding: 15px 16px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
}
.page-about .steps__idx {
  grid-row: span 2;
  font-size: 15px;
  font-weight: 700;
  color: var(--amber);
}
.page-about .steps__title {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
}
.page-about .steps__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-70);
}
.page-about .assure-aside { display: grid; gap: 14px; }
.page-about .assure-block {
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--paper-white);
}
.page-about .assure-block--celadon {
  background: var(--celadon-soft);
  border-color: transparent;
}
.page-about .assure-block__label {
  margin: 0 0 10px;
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--amber-deep);
}
.page-about .assure-block--celadon .assure-block__label { color: var(--celadon); }
.page-about .assure-block p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-70);
}
.page-about .assure-block--celadon p { color: var(--ink); }
.page-about .voucher-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}
.page-about .voucher-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink);
}
.page-about .voucher-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--celadon);
}

/* ---- 合作生态 ---- */
.page-about .eco-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
@media (min-width: 700px) {
  .page-about .eco-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
.page-about .eco-card {
  min-width: 0;
  padding: 20px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  display: grid;
  gap: 8px;
  align-content: start;
  transition: border-color .26s var(--ease), transform .26s var(--ease);
}
.page-about .eco-card:hover {
  border-color: var(--celadon);
  transform: translateY(-4px);
}
.page-about .eco-card__label {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--amber-deep);
}
.page-about .eco-card__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
}
.page-about .eco-card__body {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-70);
}
.page-about .award-row {
  margin-top: clamp(20px, 3vw, 30px);
  padding: 20px 22px;
  border-radius: var(--r-md);
  background: linear-gradient(122deg, var(--navy) 0%, var(--ink) 100%);
  color: var(--paper);
  display: grid;
  gap: 8px;
}
.page-about .award-row__label {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--amber);
}
.page-about .award-row__items {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
}

/* ---- 继续了解 ---- */
.page-about .about-next { border-bottom: 1px solid var(--line); }
.page-about .next-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
@media (min-width: 700px) {
  .page-about .next-links { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
.page-about .next-links a {
  display: block;
  height: 100%;
  padding: 18px 20px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  color: var(--ink);
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  transition: border-color .26s var(--ease), transform .26s var(--ease);
}
.page-about .next-links a:hover {
  border-color: var(--amber);
  transform: translateY(-4px);
}
.page-about .next-links span {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .04em;
  line-height: 1.6;
  color: var(--ink-45);
}