.page-about {
  --about-gap: clamp(16px, 3vw, 26px);
  --about-pad: clamp(44px, 8vw, 92px);
  --about-panel: rgba(16, 40, 61, 0.66);
  background: var(--ink-950);
  color: var(--paper-050);
}

/* 面包屑 */
.page-about .about-crumb {
  padding-top: clamp(18px, 3vw, 30px);
  padding-bottom: 4px;
}

/* ---------- 封面首屏 ---------- */
.page-about .about-cover {
  padding-block: clamp(20px, 4vw, 40px) clamp(46px, 8vw, 92px);
}

.page-about .about-cover__grid {
  display: grid;
  gap: clamp(26px, 5vw, 56px);
  align-items: end;
}

.page-about .about-cover__main {
  position: relative;
  min-width: 0;
}

.page-about .about-cover__side {
  display: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.42em;
  color: var(--sand-500);
  writing-mode: vertical-rl;
}

.page-about .about-cover__title {
  margin: 16px 0 0;
  font-size: clamp(2rem, 5.6vw, 3.5rem);
  line-height: 1.18;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--paper-050);
}

.page-about .about-cover__title em {
  font-style: normal;
  color: var(--cyan-300);
}

.page-about .about-cover__lede {
  margin: 18px 0 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.9;
  color: var(--mist-400);
}

.page-about .about-cover__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px clamp(20px, 4vw, 44px);
  margin: 26px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-about .about-cover__meta > div {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-about .about-cover__meta dt {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist-600);
}

.page-about .about-cover__meta dd {
  margin: 0;
  font-size: 14.5px;
  color: var(--sand-100);
}

.page-about .about-cover__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-cover__figure {
  margin: 0;
  padding: 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  background: linear-gradient(168deg, rgba(16, 40, 61, 0.92), rgba(8, 23, 38, 0.5));
  box-shadow: var(--paper-shadow);
}

.page-about .about-cover__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 6;
  object-fit: cover;
  border-radius: var(--r-xs);
}

.page-about .about-cover__cap {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  margin-top: 10px;
  font-size: 12px;
  color: var(--mist-600);
}

@media (min-width: 768px) {
  .page-about .about-cover__main {
    padding-left: 30px;
  }

  .page-about .about-cover__side {
    display: block;
    position: absolute;
    left: 0;
    top: 6px;
    pointer-events: none;
  }
}

@media (min-width: 920px) {
  .page-about .about-cover__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
}

/* ---------- 阶段时间线 ---------- */
.page-about .about-chron {
  padding-block: var(--about-pad);
  border-top: 1px solid var(--line);
}

.page-about .about-chron__body {
  display: grid;
  gap: 18px;
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .about-chron__rail {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-chron__tick {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  font-size: 12.5px;
  color: var(--mist-400);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-about .about-chron__tick .mono {
  font-size: 12.5px;
  letter-spacing: 0.04em;
}

.page-about .about-chron__tick:hover,
.page-about .about-chron__tick:focus-visible {
  color: var(--paper-050);
  border-color: var(--line-strong);
}

.page-about .about-chron__tick[aria-current="true"] {
  color: var(--ink-950);
  background: var(--sand-500);
  border-color: var(--sand-500);
}

.page-about .about-chron__track {
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: 0;
}

.page-about .about-chron__node {
  position: relative;
  display: grid;
  gap: 10px;
  padding: clamp(20px, 3vw, 28px) 0 clamp(20px, 3vw, 28px) 18px;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-space) + 24px);
}

.page-about .about-chron__node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 2px;
  height: 100%;
  background: var(--ink-700);
  transition: background-color var(--dur) var(--ease);
}

.page-about .about-chron__node:hover::before {
  background: var(--celadon-600);
}

.page-about .about-chron__year {
  font-size: clamp(19px, 2.6vw, 25px);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--sand-500);
}

.page-about .about-chron__content {
  min-width: 0;
}

.page-about .about-chron__content h3 {
  margin: 0 0 8px;
  font-size: clamp(16.5px, 2vw, 19.5px);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--paper-050);
}

.page-about .about-chron__content p {
  margin: 0 0 10px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist-400);
}

.page-about .about-chron__out {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  margin: 0;
  font-size: 13.5px;
  color: var(--celadon-100);
}

.page-about .about-chron__banner {
  margin: clamp(24px, 4vw, 40px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  overflow: hidden;
}

.page-about .about-chron__banner img {
  display: block;
  width: 100%;
  height: clamp(110px, 22vw, 200px);
  object-fit: cover;
}

@media (min-width: 720px) {
  .page-about .about-chron__node {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: clamp(16px, 3vw, 32px);
  }
}

@media (min-width: 960px) {
  .page-about .about-chron__body {
    grid-template-columns: 152px minmax(0, 1fr);
    gap: clamp(26px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-chron__rail {
    position: sticky;
    top: calc(var(--header-space) + 18px);
    flex-direction: column;
    flex-wrap: nowrap;
  }
}

/* ---------- 团队与分工 ---------- */
.page-about .about-team {
  padding-block: var(--about-pad);
  background: linear-gradient(180deg, rgba(16, 40, 61, 0.42), rgba(8, 23, 38, 0));
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .about-team__card {
  border-radius: var(--r-sm);
  overflow: hidden;
}

.page-about .about-team__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 12px;
  padding: 15px 17px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
}

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

.page-about .about-team__summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--signal-500);
}

.page-about .about-team__card[open] .about-team__summary::after {
  content: "−";
}

.page-about .about-team__idx {
  font-size: 12.5px;
  color: var(--sand-500);
}

.page-about .about-team__name {
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--paper-050);
}

.page-about .about-team__count {
  font-size: 12.5px;
  color: var(--celadon-100);
  white-space: nowrap;
}

.page-about .about-team__body {
  padding: 0 17px 18px;
  border-top: 1px solid var(--line);
}

.page-about .about-team__body p {
  margin: 14px 0 10px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist-400);
}

.page-about .about-team__body ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .about-team__body li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist-400);
}

.page-about .about-team__body li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--celadon-600);
}

.page-about .about-team__figure {
  margin: clamp(24px, 4vw, 40px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  overflow: hidden;
  background: rgba(16, 40, 61, 0.5);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
}

@media (min-width: 680px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 资料治理流程 ---------- */
.page-about .about-flow {
  padding-block: var(--about-pad);
}

.page-about .about-flow__list {
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid var(--line);
}

.page-about .about-flow__step {
  padding: 22px 14px 22px 0;
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-flow__num {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--sand-500);
}

.page-about .about-flow__step h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--paper-050);
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist-400);
}

@media (min-width: 760px) {
  .page-about .about-flow__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-flow__step {
    padding: 26px 20px 26px 0;
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }

  .page-about .about-flow__step:last-child {
    border-right: 0;
    padding-right: 0;
  }
}

/* ---------- 覆盖范围与服务数据 ---------- */
.page-about .about-stats {
  padding-block: var(--about-pad);
  background: var(--paper-050);
  color: var(--ink-900);
}

.page-about .about-stats__head h2 {
  margin: 0;
  font-size: clamp(1.5rem, 3.6vw, 2.15rem);
  line-height: 1.3;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--ink-950);
}

.page-about .about-stats__head p {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist-600);
}

.page-about .about-stats__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  background: var(--paper-200);
  border: 1px solid var(--paper-200);
  border-radius: var(--r-sm);
  overflow: hidden;
}

.page-about .about-stats__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(15px, 2.6vw, 24px);
  background: var(--paper-050);
  min-width: 0;
}

.page-about .about-stats__item dt {
  order: 2;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--mist-600);
}

.page-about .about-stats__item dd {
  order: 1;
  margin: 0;
}

.page-about .about-stats__num {
  font-size: clamp(1.55rem, 3.6vw, 2.15rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink-950);
}

.page-about .about-stats__unit {
  margin-left: 6px;
  font-size: 12.5px;
  color: var(--mist-600);
}

.page-about .about-stats__note {
  order: 3;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist-600);
}

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

/* ---------- 验证环境 ---------- */
.page-about .about-env {
  padding-block: var(--about-pad);
}

.page-about .about-env__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .about-env__text {
  min-width: 0;
}

.page-about .about-env__text h2 {
  margin: 14px 0 0;
  font-size: clamp(1.5rem, 3.6vw, 2.1rem);
  line-height: 1.32;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--paper-050);
}

.page-about .about-env__lede {
  margin: 14px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--mist-400);
}

.page-about .about-env__list {
  list-style: none;
  margin: 22px 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-env__list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  color: var(--mist-400);
}

.page-about .about-env__list .mono {
  flex: 0 0 auto;
  min-width: 2ch;
  font-size: 20px;
  color: var(--celadon-100);
}

.page-about .about-env__panel {
  padding: clamp(16px, 3vw, 24px);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  background: radial-gradient(120% 120% at 18% 0%, rgba(46, 140, 126, 0.22), rgba(16, 40, 61, 0.62) 62%);
}

.page-about .about-env__svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-env__cap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist-400);
}

@media (min-width: 520px) {
  .page-about .about-env__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-env__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
  }
}

/* ---------- 结尾入口 ---------- */
.page-about .about-cta {
  padding-block: clamp(40px, 7vw, 76px) clamp(54px, 9vw, 104px);
}

.page-about .about-cta__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid var(--sand-500);
  border-radius: var(--r-sm);
  background: linear-gradient(118deg, rgba(199, 161, 90, 0.16), rgba(8, 23, 38, 0.24));
}

.page-about .about-cta__text {
  flex: 1 1 320px;
  min-width: 0;
}

.page-about .about-cta__text h2 {
  margin: 0;
  font-size: clamp(1.15rem, 2.6vw, 1.5rem);
  line-height: 1.4;
  letter-spacing: -0.01em;
  font-weight: 600;
  color: var(--paper-050);
}

.page-about .about-cta__text p {
  margin: 10px 0 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist-400);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-chron__tick,
  .page-about .about-chron__node::before {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>