.page-about {
  --about-rail: 88px;
  --about-flow: clamp(20px, 3.6vw, 56px);
  background: var(--paper);
  color: var(--ink);
  padding-bottom: clamp(48px, 6vw, 88px);
  overflow-wrap: break-word;
}

.page-about .about-shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
  padding-top: clamp(14px, 2vw, 24px);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about a:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  padding-block: clamp(20px, 3.4vw, 44px) clamp(36px, 5.6vw, 76px);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.95rem, 5.4vw, 3.4rem);
  line-height: 1.18;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-about .about-hero .lede {
  margin-top: clamp(16px, 2.4vw, 24px);
  max-width: 40em;
}

.page-about .about-stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(18px, 3vw, 42px);
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: clamp(16px, 2.4vw, 22px) 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  line-height: 1;
  color: var(--clay);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--brown);
}

.page-about .dossier {
  position: relative;
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  min-height: 300px;
  border: 1px solid rgba(232, 207, 163, 0.35);
  border-radius: var(--radius-lg);
  background: linear-gradient(155deg, var(--clay) 0%, var(--clay-deep) 66%, var(--clay-deepest) 100%);
  box-shadow: var(--shadow-2);
  overflow: hidden;
  color: var(--cream);
}

.page-about .dossier::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(115deg, rgba(251, 246, 238, 0.07) 0 1px, transparent 1px 14px);
  pointer-events: none;
}

.page-about .dossier__rail {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0;
  border-right: 1px solid rgba(232, 207, 163, 0.25);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--gold-soft);
}

.page-about .dossier__body {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(22px, 3.4vw, 34px);
}

.page-about .dossier__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gold-soft);
}

.page-about .dossier__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.7rem, 3.4vw, 2.3rem);
  line-height: 1.28;
  color: var(--cream);
}

.page-about .dossier__meta {
  margin: auto 0 0;
  padding-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(251, 246, 238, 0.82);
}

.page-about .dossier__seal {
  position: absolute;
  right: clamp(18px, 3vw, 28px);
  bottom: clamp(16px, 2.6vw, 24px);
  width: 62px;
  height: 62px;
  display: grid;
  place-items: center;
  border: 1px solid var(--gold);
  border-radius: 50%;
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--gold-soft);
  transform: rotate(-8deg);
}

/* ---------- 章节骨架 ---------- */

.page-about .about-section {
  padding-block: clamp(34px, 5.2vw, 72px);
  border-top: 1px solid var(--line);
}

.page-about .about-head {
  max-width: 46rem;
  margin-bottom: clamp(22px, 3.4vw, 40px);
}

.page-about .about-head .section-title {
  margin: 10px 0 0;
}

.page-about .about-head__note {
  margin: 12px 0 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--brown);
}

/* ---------- 时间轴 ---------- */

.page-about .timeline {
  display: grid;
  gap: clamp(22px, 3.6vw, 38px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .timeline__item {
  display: grid;
  gap: 10px;
  padding-top: clamp(16px, 2.4vw, 26px);
  border-top: 1px solid var(--line);
}

.page-about .timeline__item:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .timeline__rail {
  display: flex;
  align-items: flex-start;
}

.page-about .timeline__num {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.9rem, 4.2vw, 2.9rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--gold);
}

.page-about .timeline__kicker {
  display: block;
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--peacock);
}

.page-about .timeline__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.12rem, 2.2vw, 1.45rem);
  line-height: 1.45;
  color: var(--ink);
}

.page-about .timeline__text {
  margin: 12px 0 0;
  max-width: 44rem;
  line-height: 1.8;
}

.page-about .timeline__figure {
  max-width: 640px;
  margin: clamp(18px, 3vw, 28px) 0 0;
}

.page-about .timeline__aside {
  max-width: 520px;
  margin: clamp(26px, 4vw, 42px) 0 0;
}

.page-about .timeline__fold {
  margin: 0;
  border: 0;
}

.page-about .timeline__summary {
  position: relative;
  display: block;
  padding-right: 46px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .timeline__summary::after {
  content: "+";
  position: absolute;
  top: 0;
  right: 0;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: var(--cream);
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--peacock);
  transition: background var(--ease), color var(--ease), border-color var(--ease);
}

.page-about .timeline__summary:hover::after {
  border-color: var(--peacock);
}

.page-about .timeline__fold[open] .timeline__summary::after {
  content: "–";
  background: var(--peacock);
  border-color: var(--peacock);
  color: var(--cream);
}

.page-about .timeline__body {
  max-width: 44rem;
  padding-top: 12px;
}

.page-about .timeline__body p {
  margin: 0 0 10px;
  line-height: 1.8;
}

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

/* ---------- 图片框 ---------- */

.page-about .media-frame {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-deep);
  box-shadow: var(--shadow-1);
  overflow: hidden;
}

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

.page-about .media-frame__caption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  background: var(--cream);
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--brown);
}

/* ---------- 权益四组 ---------- */

.page-about .benefit-grid {
  display: grid;
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--line);
  overflow: hidden;
}

.page-about .benefit {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 3vw, 32px);
  background: var(--cream);
  transition: background var(--ease);
}

.page-about .benefit:hover {
  background: var(--paper-deep);
}

.page-about .benefit__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .benefit h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.1rem, 1.8vw, 1.32rem);
  line-height: 1.42;
}

.page-about .benefit p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
}

.page-about .benefit .benefit__path {
  margin-top: auto;
  padding-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--brown);
}

.page-about .benefit__path a {
  color: var(--peacock);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
}

.page-about .benefit__path a:hover {
  color: var(--peacock-light);
  border-bottom-color: var(--peacock-light);
}

/* ---------- 团队 ---------- */

.page-about .team-figure {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  align-items: center;
}

.page-about .team-figure__chart {
  display: grid;
  place-items: center;
}

.page-about .team-ring {
  position: relative;
  width: 200px;
  max-width: 100%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: conic-gradient(
    var(--peacock) 0 108deg,
    var(--gold) 108deg 162deg,
    var(--peacock-light) 162deg 246deg,
    var(--shard) 246deg 360deg
  );
  box-shadow: var(--shadow-1);
}

.page-about .team-ring::after {
  content: "";
  position: absolute;
  inset: 24%;
  border-radius: 50%;
  background: var(--paper);
  box-shadow: inset 0 0 0 1px var(--line);
}

.page-about .team-ring__center {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  align-content: center;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.9rem;
  line-height: 1;
  color: var(--clay);
  text-align: center;
}

.page-about .team-ring__center span {
  display: block;
  margin-top: 7px;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--brown);
}

.page-about .team-legend {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  list-style: none;
  overflow: hidden;
}

.page-about .team-legend__item {
  display: grid;
  grid-template-columns: 10px auto minmax(0, 1fr);
  gap: 4px 12px;
  align-items: baseline;
  padding: 14px 16px;
  background: var(--cream);
  transition: background var(--ease);
}

.page-about .team-legend__item:hover {
  background: var(--paper-deep);
}

.page-about .team-legend__dot {
  width: 10px;
  height: 10px;
  align-self: center;
  border-radius: 50%;
}

.page-about .team-legend__dot--a { background: var(--peacock); }
.page-about .team-legend__dot--b { background: var(--gold); }
.page-about .team-legend__dot--c { background: var(--peacock-light); }
.page-about .team-legend__dot--d { background: var(--shard); }

.page-about .team-legend__name {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--ink);
}

.page-about .team-legend__num {
  justify-self: end;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--clay);
}

.page-about .team-legend__desc {
  grid-column: 2 / -1;
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--brown);
}

.page-about .team-media {
  max-width: 680px;
  margin: clamp(24px, 4vw, 40px) 0 0;
}

/* ---------- 覆盖与生态 ---------- */

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

.page-about .coverage__graph {
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--cream);
  box-shadow: var(--shadow-1);
}

.page-about .coverage-grid {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 8px;
}

.page-about .coverage-grid span {
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--shard);
  opacity: 0.4;
}

.page-about .coverage-grid span:nth-child(3n) {
  background: var(--peacock);
  opacity: 0.85;
}

.page-about .coverage-grid span:nth-child(7n) {
  background: var(--gold);
  opacity: 1;
}

.page-about .coverage__caption {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--brown);
}

.page-about .coverage-list {
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .coverage-list li {
  padding-left: 16px;
  border-left: 2px solid var(--gold-soft);
  font-size: 0.95rem;
  line-height: 1.8;
}

.page-about .coverage-list__k {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--peacock);
}

.page-about .coverage-list a {
  color: var(--peacock);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
}

.page-about .coverage-list a:hover {
  color: var(--peacock-light);
}

/* ---------- 服务标准 ---------- */

.page-about .standards {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .standards__item {
  padding-top: 18px;
  border-top: 2px solid var(--clay);
}

.page-about .standards__k {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  line-height: 1.15;
  color: var(--clay);
}

.page-about .standards__item h3 {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--brown);
}

.page-about .standards__item p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ---------- 收尾 ---------- */

.page-about .about-cta {
  margin-top: clamp(34px, 5vw, 68px);
  padding: clamp(26px, 4.4vw, 54px);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--clay) 0%, var(--clay-deep) 100%);
  box-shadow: var(--shadow-2);
  color: var(--cream);
}

.page-about .about-cta__k {
  margin: 0 0 12px;
  color: var(--gold-soft);
}

.page-about .about-cta h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.36;
  color: var(--cream);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 42rem;
  line-height: 1.85;
  color: rgba(251, 246, 238, 0.88);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-about .coverage-grid {
    grid-template-columns: repeat(11, minmax(0, 1fr));
  }

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

@media (min-width: 860px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-about .timeline__item {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-flow);
  }

  .page-about .timeline__aside {
    margin-left: calc(var(--about-rail) + var(--about-flow));
  }

  .page-about .team-figure {
    grid-template-columns: 220px minmax(0, 1fr);
  }

  .page-about .coverage {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

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

@media (min-width: 1080px) {
  .page-about .about-hero__visual {
    padding-bottom: 6px;
  }

  .page-about .timeline__item {
    padding-top: clamp(20px, 2.6vw, 30px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .benefit,
  .page-about .team-legend__item,
  .page-about .timeline__summary::after {
    transition: none;
  }
}
<<<END>>>