.page-about {
  background: var(--warm);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
}

.page-about .shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-block: clamp(14px, 2.4vw, 22px) 0;
}

.page-about .crumb-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  font-size: 14px;
  color: var(--slate);
}

.page-about .crumb-list a {
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .crumb-list a:hover,
.page-about .crumb-list a:focus-visible {
  color: var(--cinnabar);
  border-color: var(--cinnabar);
}

.page-about .crumb-list li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--sand);
}

.page-about .crumb-current {
  color: var(--night);
  font-weight: 600;
}

/* ---------- 首屏 ---------- */
.page-about .story-hero {
  position: relative;
  overflow: hidden;
  background: var(--night);
  color: var(--warm);
  padding: clamp(30px, 5vw, 60px) 0 clamp(40px, 7vw, 88px);
}

.page-about .story-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 90% 8%, rgba(201, 162, 75, .2), transparent 46%),
    radial-gradient(circle at 4% 96%, rgba(196, 54, 42, .26), transparent 44%);
  pointer-events: none;
}

.page-about .story-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--gold), var(--cinnabar) 55%, var(--night-2));
}

.page-about .story-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 52px);
}

.page-about .story-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 20px;
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-about .kicker-rule {
  display: inline-block;
  width: 36px;
  height: 2px;
  background: var(--gold);
}

.page-about .story-hero h1 {
  margin: 0 0 22px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 6.2vw, 54px);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--warm);
}

.page-about .story-hero__lead {
  margin: 0 0 30px;
  max-width: 44em;
  font-size: clamp(16px, 1vw + 12px, 18px);
  line-height: 1.9;
  color: rgba(246, 241, 231, .84);
}

.page-about .story-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .story-hero .btn--ghost {
  color: var(--warm);
  background: transparent;
  border: 2px solid rgba(246, 241, 231, .5);
}

.page-about .story-hero .btn--ghost:hover,
.page-about .story-hero .btn--ghost:focus-visible {
  color: var(--gold);
  border-color: var(--gold);
}

/* 首屏右侧印章面板 */
.page-about .story-hero__panel {
  justify-self: start;
  width: 100%;
  max-width: 340px;
  padding: clamp(22px, 4vw, 34px) clamp(18px, 3.4vw, 28px);
  border: 2px solid rgba(246, 241, 231, .3);
  background: rgba(22, 41, 77, .78);
  box-shadow: 10px 10px 0 rgba(201, 162, 75, .28);
  text-align: center;
}

.page-about .seal-block {
  position: relative;
  width: 96px;
  height: 96px;
  margin: 0 auto 20px;
  display: grid;
  place-items: center;
  background: var(--cinnabar);
  border: 3px solid var(--cinnabar-2);
  transform: rotate(-3deg);
}

.page-about .seal-block::after {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px solid rgba(246, 241, 231, .55);
  pointer-events: none;
}

.page-about .seal-block__glyph {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 54px;
  line-height: 1;
  color: var(--warm);
}

.page-about .seal-block__year {
  margin: 0 0 6px;
  font-family: var(--font-num);
  font-size: 40px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--gold);
  line-height: 1;
}

.page-about .seal-block__note {
  margin: 0 0 18px;
  font-size: 13px;
  letter-spacing: .1em;
  color: rgba(246, 241, 231, .68);
}

.page-about .seal-block__tagline {
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid rgba(246, 241, 231, .22);
  font-size: 14px;
  letter-spacing: .06em;
  color: rgba(246, 241, 231, .86);
}

/* ---------- 通用分节 ---------- */
.page-about .band {
  padding: clamp(42px, 7vw, 88px) 0;
  border-top: 2px solid var(--sand);
}

.page-about .band--night {
  background: var(--night);
  color: var(--warm);
  border-top-color: var(--night-2);
}

.page-about .band--sand {
  background: var(--sand);
  border-top-color: var(--sand);
}

.page-about .sec-head {
  max-width: 62ch;
  margin-bottom: clamp(24px, 4vw, 42px);
}

.page-about .sec-kicker {
  margin: 0 0 12px;
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .14em;
  color: var(--cinnabar);
}

.page-about .sec-head h2 {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--night);
}

.page-about .sec-head h2::after {
  content: "";
  display: block;
  width: 56px;
  height: 4px;
  margin-top: 16px;
  background: var(--cinnabar);
}

.page-about .sec-lead {
  margin: 0;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--slate);
}

.page-about .band--night .sec-head h2 {
  color: var(--warm);
}

.page-about .band--night .sec-kicker {
  color: var(--gold);
}

.page-about .band--night .sec-head h2::after {
  background: var(--gold);
}

.page-about .band--night .sec-lead {
  color: rgba(246, 241, 231, .74);
}

/* ---------- 缘起 ---------- */
.page-about .split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 42px);
  align-items: start;
}

.page-about .split__text p {
  margin: 0 0 16px;
  line-height: 1.9;
  color: var(--ink);
}

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

.page-about .split__text p:first-child::first-letter {
  float: left;
  margin: 4px 10px 0 0;
  font-family: var(--font-head);
  font-size: 52px;
  line-height: .9;
  font-weight: 900;
  color: var(--cinnabar);
}

.page-about .split__media {
  margin: 0;
}

.page-about .split__media .media-frame {
  border: var(--border);
  box-shadow: var(--shadow-hard);
}

/* ---------- 理念 ---------- */
.page-about .creed-list {
  display: grid;
  gap: 14px;
}

.page-about .creed-item {
  border: 2px solid rgba(246, 241, 231, .2);
  border-left: 6px solid var(--cinnabar);
  background: rgba(11, 27, 51, .55);
  transition: border-color .22s var(--ease);
}

.page-about .creed-item[open] {
  border-left-color: var(--gold);
}

.page-about .creed-item summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(17px, 1.2vw + 13px, 21px);
  line-height: 1.4;
  color: var(--warm);
}

.page-about .creed-item summary::-webkit-details-marker {
  display: none;
}

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

.page-about .creed-num {
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--cinnabar-2);
}

.page-about .creed-item[open] .creed-num {
  color: var(--gold);
}

.page-about .creed-toggle {
  position: relative;
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.page-about .creed-toggle::before,
.page-about .creed-toggle::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--gold);
  transform: translate(-50%, -50%);
}

.page-about .creed-toggle::before {
  width: 14px;
  height: 2px;
}

.page-about .creed-toggle::after {
  width: 2px;
  height: 14px;
  transition: transform .24s var(--ease), opacity .24s var(--ease);
}

.page-about .creed-item[open] .creed-toggle::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}

.page-about .creed-body {
  margin: 0;
  padding: 0 20px 22px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(246, 241, 231, .8);
}

/* ---------- 团队 ---------- */
.page-about .team-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .team-card {
  position: relative;
  padding: 22px 20px;
  background: #FFFDF8;
  border: var(--border);
  border-top: 5px solid var(--cinnabar);
  box-shadow: var(--shadow-hard-sm);
}

.page-about .team-card:nth-child(2) {
  border-top-color: var(--celadon);
}

.page-about .team-card:nth-child(3) {
  border-top-color: var(--gold);
}

.page-about .team-count {
  margin: 0 0 8px;
  font-family: var(--font-num);
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--slate);
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .team-count .num {
  font-family: var(--font-num);
  font-size: 38px;
  font-weight: 700;
  line-height: 1;
  color: var(--night);
}

.page-about .team-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 19px;
  color: var(--night);
}

.page-about .team-card p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .team-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
}

.page-about .team-figure {
  margin: 0;
}

.page-about .team-figure .media-frame {
  border: var(--border);
  box-shadow: var(--shadow-hard);
}

.page-about .figure-note {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 三级校对 ---------- */
.page-about .flow {
  list-style: none;
  margin: 0 0 clamp(28px, 4.5vw, 48px);
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .flow-step {
  padding-top: 18px;
  border-top: 4px solid var(--night);
}

.page-about .flow-step:nth-child(2) {
  border-top-color: var(--cinnabar);
}

.page-about .flow-step:nth-child(3) {
  border-top-color: var(--gold);
}

.page-about .flow-num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--slate);
}

.page-about .flow-step h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 22px;
  color: var(--night);
}

.page-about .flow-step p {
  margin: 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink);
}

.page-about .flow-proof {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  padding: clamp(16px, 3vw, 26px);
  background: #FFFDF8;
  border: var(--border);
  box-shadow: var(--shadow-hard);
}

.page-about .flow-proof__media {
  margin: 0;
}

.page-about .flow-proof__media .media-frame {
  border: 2px solid var(--ink);
}

.page-about .flow-proof__text h3 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 21px;
  color: var(--night);
}

.page-about .flow-proof__text p {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--ink);
}

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

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  list-style: none;
  position: relative;
  margin: 0;
  padding: 0 0 0 32px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 24px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--cinnabar) 60%, var(--celadon) 100%);
}

.page-about .tl-item {
  position: relative;
  padding-bottom: 30px;
}

.page-about .tl-item:last-child {
  padding-bottom: 0;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 5px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--warm);
  border: 3px solid var(--cinnabar);
  box-shadow: 0 0 0 4px var(--warm);
  z-index: 1;
}

.page-about .tl-item:last-child::before {
  border-color: var(--gold);
}

.page-about .tl-year {
  display: inline-block;
  margin-bottom: 6px;
  font-family: var(--font-num);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--night);
  text-decoration: none;
  border-bottom: 2px solid var(--gold);
  transition: color .2s var(--ease);
}

.page-about .tl-year:hover,
.page-about .tl-year:focus-visible {
  color: var(--cinnabar);
}

.page-about .tl-key {
  display: inline-block;
  margin-left: 10px;
  padding: 2px 8px;
  vertical-align: middle;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--warm);
  background: var(--cinnabar);
  border-bottom: none;
}

.page-about .tl-body h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 20px;
  color: var(--night);
}

.page-about .tl-body p {
  margin: 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink);
}

/* ---------- 服务区域与协作 ---------- */
.page-about .region-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4.5vw, 46px);
}

.page-about .region-col h2 {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.32;
  color: var(--warm);
}

.page-about .region-text {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(246, 241, 231, .78);
}

.page-about .band--night .sec-kicker {
  color: var(--gold);
}

.page-about .region-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
}

.page-about .region-list li {
  padding: 5px 14px;
  border: 2px solid rgba(246, 241, 231, .34);
  font-family: var(--font-num);
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--warm);
}

.page-about .region-col .btn {
  margin-top: 6px;
}

/* ---------- 收尾 ---------- */
.page-about .band--cta {
  background: var(--warm);
  border-top: 6px solid var(--cinnabar);
}

.page-about .cta-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 40px);
}

.page-about .cta-label {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--cinnabar);
}

.page-about .cta-copy h2 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--night);
}

.page-about .cta-copy p {
  margin: 0;
  max-width: 42em;
  font-size: 16px;
  line-height: 1.9;
  color: var(--slate);
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

.page-about .band--cta .btn--ghost {
  color: var(--night);
  background: transparent;
  border: 2px solid var(--night);
}

.page-about .band--cta .btn--ghost:hover,
.page-about .band--cta .btn--ghost:focus-visible {
  color: var(--cinnabar);
  border-color: var(--cinnabar);
}

/* ---------- 图片兜底 ---------- */
.page-about .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .team-card:nth-child(2) {
    transform: translateY(16px);
  }
}

@media (min-width: 780px) {
  .page-about .flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .flow-proof {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 860px) {
  .page-about .timeline {
    padding-left: 190px;
  }

  .page-about .timeline::before {
    left: 151px;
  }

  .page-about .tl-item::before {
    left: -46px;
  }

  .page-about .tl-year {
    position: absolute;
    left: -170px;
    top: 0;
    width: 130px;
    margin-bottom: 0;
    text-align: right;
    font-size: 26px;
    border-bottom: none;
    padding-bottom: 2px;
  }

  .page-about .tl-year::after {
    content: "";
    position: absolute;
    right: 0;
    bottom: 0;
    width: 34px;
    height: 2px;
    background: var(--gold);
  }

  .page-about .tl-key {
    position: absolute;
    right: 0;
    top: 38px;
    display: block;
    margin: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity .22s var(--ease), transform .22s var(--ease), visibility .22s var(--ease);
  }

  .page-about .tl-year:hover .tl-key,
  .page-about .tl-year:focus-visible .tl-key {
    opacity: 1;
    visibility: visible;
    transform: none;
  }
}

@media (min-width: 900px) {
  .page-about .split {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.55fr) minmax(220px, .85fr);
  }

  .page-about .region-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  }
}

@media (min-width: 940px) {
  .page-about .story-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(260px, .8fr);
    align-items: center;
  }

  .page-about .story-hero__panel {
    justify-self: end;
  }
}

@media (min-width: 900px) {
  .page-about .cta-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .creed-item,
  .page-about .creed-toggle::after,
  .page-about .tl-key,
  .page-about .tl-year,
  .page-about .crumb-list a,
  .page-about .team-card {
    transition: none;
  }

  .page-about .team-card:nth-child(2) {
    transform: none;
  }
}
<<<END>>>