.page-about {
  background: var(--cream);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(24px, 4vw, 44px) clamp(36px, 6vw, 72px);
  background:
    radial-gradient(110% 80% at 88% 0%, rgba(201, 130, 99, .20), transparent 62%),
    radial-gradient(80% 60% at 4% 100%, rgba(46, 110, 116, .10), transparent 70%),
    var(--cream);
}
.page-about .about-hero__title {
  margin: 18px 0 0;
  font-family: var(--font-display);
  font-size: clamp(34px, 7vw, 84px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.015em;
}
.page-about .about-hero__title em {
  font-style: normal;
  color: var(--clay);
  background: linear-gradient(transparent 72%, rgba(197, 154, 74, .38) 72%);
}
.page-about .about-hero__lede {
  max-width: 62ch;
  margin-top: 24px;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.9;
  color: rgba(33, 23, 20, .84);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 4vw, 44px) 0 0;
  background: rgba(125, 110, 97, .28);
  border: 1px solid rgba(125, 110, 97, .28);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.page-about .about-stat {
  padding: 16px 18px 18px;
  background: var(--cream);
}
.page-about .about-stat__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--line);
}
.page-about .about-stat__num {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.2vw, 32px);
  font-weight: 600;
  color: var(--clay);
  line-height: 1.1;
}
.page-about .about-stat__num span {
  margin-left: 6px;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 400;
  color: var(--line);
}

/* ---------- 主栅格 ---------- */
.page-about .about-body {
  padding-bottom: clamp(48px, 7vw, 96px);
}
.page-about .about-layout {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
}

/* ---------- 侧边索引 ---------- */
.page-about .about-index {
  border-top: var(--hair);
  padding-top: 14px;
}
.page-about .about-index__inner {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}
.page-about .about-index__title {
  display: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--line);
}
.page-about .about-index__link {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: baseline;
  gap: 6px;
  padding: 7px 14px;
  border: 1px solid rgba(125, 110, 97, .3);
  border-radius: var(--radius-pill);
  font-size: 13px;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color .2s ease, border-color .2s ease, color .2s ease;
}
.page-about .about-index__link span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--clay);
}
.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  border-color: var(--clay);
  background: rgba(142, 68, 47, .07);
}
.page-about .about-index__link.is-active {
  background: var(--clay);
  border-color: var(--clay);
  color: var(--cream);
}
.page-about .about-index__link.is-active span {
  color: var(--gold);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  padding-block: clamp(34px, 5vw, 60px);
  border-top: var(--hair);
}
.page-about .about-section:first-child {
  border-top: 0;
  padding-top: 0;
}
.page-about .about-kicker {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--line);
  text-transform: uppercase;
}
.page-about .about-num {
  font-size: 13px;
  font-weight: 600;
  color: var(--clay);
}
.page-about .about-section__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 44px);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.01em;
}
.page-about .about-section__lede {
  max-width: 62ch;
  margin-top: 16px;
  font-size: 16.5px;
  line-height: 1.85;
  color: rgba(33, 23, 20, .84);
}
.page-about .about-section__text p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(33, 23, 20, .86);
}
.page-about .about-section__grid {
  display: grid;
  gap: 24px;
  margin-top: 22px;
}

/* ---------- 图片框 ---------- */
.page-about .about-figure,
.page-about .method-figure {
  margin: 0;
}
.page-about .about-figure .media-frame,
.page-about .method-figure .media-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  max-width: 100%;
}
.page-about .about-figure img,
.page-about .method-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 阶段时间线 ---------- */
.page-about .stage-list {
  margin-top: clamp(26px, 4vw, 40px);
  border-top: var(--hair);
}
.page-about .stage {
  border-bottom: var(--hair);
}
.page-about .stage__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}
.page-about .stage__summary::-webkit-details-marker {
  display: none;
}
.page-about .stage__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--clay);
}
.page-about .stage[open] .stage__summary::after {
  content: "−";
}
.page-about .stage__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--clay);
}
.page-about .stage__no::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--gold);
  vertical-align: middle;
}
.page-about .stage__name {
  flex: 1 1 220px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 23px);
  font-weight: 600;
  line-height: 1.4;
}
.page-about .stage[open] .stage__name {
  color: var(--clay-deep);
}
.page-about .stage__state {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--line);
}
.page-about .stage__body {
  padding-bottom: 22px;
  max-width: 66ch;
}
.page-about .stage__body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.88;
  color: rgba(33, 23, 20, .84);
}

/* ---------- 团队构成 ---------- */
.page-about .team-bar {
  display: flex;
  margin-top: clamp(24px, 3vw, 34px);
  height: 56px;
  border-radius: var(--radius-pill);
  overflow: hidden;
  border: 1px solid rgba(125, 110, 97, .28);
}
.page-about .team-bar__seg {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--cream);
  transition: filter .2s ease;
}
.page-about .team-bar__seg--a { flex: 22; background: var(--clay); }
.page-about .team-bar__seg--b { flex: 18; background: var(--lake); color: var(--cream); }
.page-about .team-bar__seg--c { flex: 14; background: var(--terra); color: var(--ink); }
.page-about .team-bar__seg--d { flex: 14; background: var(--gold); color: var(--ink); }
.page-about .team-bar:hover .team-bar__seg:hover {
  filter: brightness(1.08);
}
.page-about .team-list {
  display: grid;
  gap: 1px;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
  background: rgba(125, 110, 97, .25);
  border: 1px solid rgba(125, 110, 97, .25);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.page-about .team-item {
  padding: 20px 18px 22px;
  background: var(--mist);
}
.page-about .team-item__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 600;
  line-height: 1;
  color: var(--clay);
}
.page-about .team-item__name {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
}
.page-about .team-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(33, 23, 20, .8);
}

/* ---------- 服务网络 ---------- */
.page-about .network-wrap {
  display: grid;
  gap: 24px;
  margin-top: 22px;
}
.page-about .network-figure {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--night);
}
.page-about .network-figure > img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  opacity: .32;
  filter: saturate(.7);
}
.page-about .net-map {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.page-about .net-links path {
  fill: none;
  stroke: rgba(230, 225, 214, .5);
  stroke-width: 1.2;
  stroke-dasharray: 4 6;
}
.page-about .net-node circle {
  fill: var(--gold);
  stroke: var(--cream);
  stroke-width: 2;
}
.page-about .net-node--core circle {
  fill: var(--terra);
  stroke: var(--cream);
  stroke-width: 3;
}
.page-about .net-node text {
  font-family: var(--font-body);
  font-size: 15px;
  fill: var(--cream);
}
.page-about .network-text p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.88;
  color: rgba(33, 23, 20, .86);
}
.page-about .network-points {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .network-points li {
  padding: 12px 14px;
  border: 1px solid rgba(125, 110, 97, .3);
  border-radius: var(--radius-md);
  font-size: 13px;
  line-height: 1.6;
  color: rgba(33, 23, 20, .78);
}
.page-about .network-points span {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 600;
  color: var(--lake-deep);
}

/* ---------- 资料整理 ---------- */
.page-about .method-grid {
  display: grid;
  gap: 24px;
  margin-top: 22px;
}
.page-about .method-code {
  padding: 22px 20px;
  border-radius: var(--radius-md);
  background: var(--mist);
  border-left: 4px solid var(--clay);
}
.page-about .method-code__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--line);
}
.page-about .method-code__value {
  margin: 10px 0 18px;
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.6vw, 26px);
  font-weight: 600;
  color: var(--clay-deep);
  word-break: break-word;
}
.page-about .method-code__parts {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .method-code__parts li {
  padding: 10px 0;
  border-top: var(--hair);
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(33, 23, 20, .82);
}
.page-about .method-code__parts b {
  display: block;
  font-weight: 600;
  color: var(--ink);
}
.page-about .method-subtitle {
  margin: clamp(28px, 4vw, 40px) 0 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 600;
}
.page-about .method-forms {
  display: grid;
  gap: 1px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  background: rgba(125, 110, 97, .25);
  border: 1px solid rgba(125, 110, 97, .25);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.page-about .form-item {
  padding: 16px 18px 18px;
  background: var(--cream);
}
.page-about .form-item__tag {
  display: inline-block;
  margin: 0;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  background: var(--lake-pale);
  color: var(--lake-deep);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
}
.page-about .form-item__desc {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(33, 23, 20, .82);
}
.page-about .method-note {
  margin: 20px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--gold);
  font-size: 14px;
  line-height: 1.8;
  color: var(--line);
}

/* ---------- 认证与合作 ---------- */
.page-about .trust-panel {
  margin-top: 22px;
  padding: clamp(22px, 4vw, 40px);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(90% 70% at 100% 0%, rgba(46, 110, 116, .45), transparent 65%),
    var(--night);
  color: var(--mist);
  display: grid;
  gap: 26px;
}
.page-about .trust-certs {
  display: grid;
  gap: 16px;
}
.page-about .cert-item {
  padding: 18px 20px 20px;
  border: var(--hair-light);
  border-radius: var(--radius-md);
  background: rgba(244, 236, 221, .05);
}
.page-about .cert-item__code {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold);
}
.page-about .cert-item__name {
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  color: var(--cream);
}
.page-about .cert-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(230, 225, 214, .8);
}
.page-about .trust-partners__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--lake-pale);
}
.page-about .partner-line {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 0;
  border-top: var(--hair-light);
}
.page-about .partner-line__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 600;
  color: var(--gold);
  line-height: 1;
}
.page-about .partner-line__text {
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(230, 225, 214, .85);
}
.page-about .trust-partners__note {
  margin: 14px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(230, 225, 214, .65);
}

/* ---------- 培训与成长 ---------- */
.page-about .growth-grid {
  display: grid;
  gap: 26px;
  margin-top: 22px;
}
.page-about .growth-text p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(33, 23, 20, .86);
}
.page-about .growth-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: rgba(125, 110, 97, .25);
  border: 1px solid rgba(125, 110, 97, .25);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.page-about .growth-stats li {
  padding: 16px 14px;
  background: var(--mist);
}
.page-about .growth-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.8vw, 26px);
  font-weight: 600;
  color: var(--lake-deep);
  line-height: 1.1;
}
.page-about .growth-stats__label {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(33, 23, 20, .72);
}

.page-about .about-cta {
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(22px, 4vw, 34px);
  border-radius: var(--radius-lg);
  background: var(--mist);
  border: 1px solid rgba(125, 110, 97, .25);
}
.page-about .about-cta__text {
  margin: 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .team-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .method-forms {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .trust-certs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-section__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
    gap: 32px;
  }
  .page-about .method-grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
    gap: 32px;
  }
  .page-about .network-points {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .growth-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-about .about-layout {
    grid-template-columns: 196px minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-index {
    position: sticky;
    top: 96px;
    border-top: 0;
    padding-top: 0;
    border-left: var(--hair);
    padding-left: 16px;
  }
  .page-about .about-index__inner {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-about .about-index__title {
    display: block;
    margin: 0 0 10px;
  }
  .page-about .about-index__link {
    border: 0;
    border-radius: 0;
    padding: 7px 0;
    font-size: 13.5px;
    color: rgba(33, 23, 20, .72);
    border-bottom: 1px solid transparent;
  }
  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    background: transparent;
    border-bottom-color: var(--gold);
    color: var(--ink);
  }
  .page-about .about-index__link.is-active {
    background: transparent;
    color: var(--clay);
    border-bottom-color: var(--clay);
  }
  .page-about .about-index__link.is-active span {
    color: var(--gold-deep);
  }
  .page-about .network-wrap {
    grid-template-columns: 8fr 4fr;
    align-items: start;
    gap: 32px;
  }
  .page-about .growth-grid {
    grid-template-columns: 5fr 7fr;
    align-items: start;
    gap: 36px;
  }
  .page-about .trust-panel {
    grid-template-columns: 7fr 5fr;
    gap: 32px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-layout {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 64px;
  }
  .page-about .about-hero__lede {
    max-width: 58ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .team-bar__seg {
    transition: none;
  }
}
<<<END>>>