.page-about {
  background: var(--night);
  color: var(--warm-white);
}

.page-about .breadcrumb {
  padding-top: 24px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: 40px;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about .about-title {
  margin: 16px 0 0;
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(38px, 10vw, 92px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--warm-white);
}

.page-about .about-lede {
  margin-top: 24px;
  max-width: 42em;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 32px;
}

.page-about .about-hero-aside {
  display: grid;
  gap: 16px;
}

.page-about .about-hero-note {
  color: var(--mist);
}

.page-about .about-hero-figure {
  aspect-ratio: 4 / 5;
  margin: 0;
  border: var(--hair-faint);
}

.page-about .about-hero-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: 64px;
  border-top: var(--hair);
}

.page-about .about-fact {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 20px 0;
  border-bottom: var(--hair-faint);
}

.page-about .about-fact-num {
  font-family: var(--mono);
  font-size: var(--fs-24);
  letter-spacing: 0.06em;
  color: var(--gold);
  min-width: 88px;
}

.page-about .about-fact-unit {
  font-size: var(--fs-14);
  margin-left: 2px;
  color: var(--gold-light);
}

.page-about .about-fact-label {
  font-size: var(--fs-14);
  color: var(--warm-gray);
  line-height: 1.6;
}

/* ---------- 起点与定位 ---------- */
.page-about .about-origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about .about-origin-copy .prose {
  margin-top: 16px;
  max-width: 42em;
}

.page-about .about-origin-aside {
  border-top: var(--hair-strong);
  padding-top: 20px;
}

.page-about .about-origin-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}

.page-about .about-origin-list li {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: var(--hair-faint);
  font-size: var(--fs-14);
  color: var(--warm-white);
}

.page-about .about-origin-list .mono {
  color: var(--gold);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline-lede {
  margin-top: 20px;
  max-width: 42em;
}

.page-about .about-timeline-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 56px;
}

.page-about .about-rail {
  border-top: var(--hair-strong);
  padding-top: 16px;
}

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

.page-about .about-rail-item {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: var(--fs-12);
  color: var(--warm-gray);
}

.page-about .about-rail-item .mono {
  color: var(--gold);
  letter-spacing: 0.1em;
}

.page-about .about-rail-label {
  letter-spacing: 0.08em;
}

.page-about .about-tl-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-tl-node {
  position: relative;
  padding: 0 0 32px 26px;
  border-left: var(--hair-faint);
}

.page-about .about-tl-node::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 10px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lafite);
  box-shadow: 0 0 0 4px rgba(123, 30, 43, 0.16);
}

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

.page-about .about-tl-details {
  border-bottom: var(--hair-faint);
  padding-bottom: 8px;
}

.page-about .about-tl-summary {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 14px;
  align-items: baseline;
  padding: 4px 0 14px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-tl-ver {
  font-family: var(--mono);
  font-size: var(--fs-14);
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .about-tl-head {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: var(--fs-24);
  line-height: 1.3;
  color: var(--warm-white);
}

.page-about .about-tl-stage {
  grid-column: 2;
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--warm-gray);
}

.page-about .about-tl-body {
  padding: 0 0 12px;
}

.page-about .about-tl-body p {
  margin: 0;
  max-width: 42em;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--warm-gray);
}

.page-about .about-tl-details[open] .about-tl-head {
  color: var(--gold-light);
}

.page-about .about-timeline-foot {
  margin-top: 48px;
}

/* ---------- 服务能力 ---------- */
.page-about .about-cap-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

.page-about .about-cap-lede {
  margin-top: 20px;
  max-width: 42em;
}

.page-about .about-cap-list {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  border-top: var(--hair-strong);
}

.page-about .about-cap-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 18px 12px 18px 16px;
  border-bottom: var(--hair-faint);
  border-left: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background-color 0.3s var(--ease);
}

.page-about .about-cap-item:hover,
.page-about .about-cap-item:focus-visible,
.page-about .about-cap-item:focus {
  border-left-color: var(--gold);
  background-color: rgba(201, 162, 39, 0.05);
  outline: none;
}

.page-about .about-cap-key {
  font-family: var(--mono);
  font-size: var(--fs-24);
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-about .about-cap-unit {
  font-size: var(--fs-12);
  margin-left: 2px;
  color: var(--gold-light);
}

.page-about .about-cap-name {
  font-size: var(--fs-16);
  color: var(--warm-white);
}

.page-about .about-cap-note {
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--warm-gray);
  opacity: 0.55;
  transition: opacity 0.3s var(--ease), color 0.3s var(--ease);
}

.page-about .about-cap-item:hover .about-cap-note,
.page-about .about-cap-item:focus .about-cap-note,
.page-about .about-cap-item:focus-within .about-cap-note {
  opacity: 1;
  color: var(--warm-white);
}

.page-about .about-cap-figure {
  aspect-ratio: 3 / 2;
  margin: 0;
  border: var(--hair-faint);
}

.page-about .about-cap-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 家庭场景 ---------- */
.page-about .about-scene-lede {
  margin-top: 20px;
  max-width: 42em;
}

.page-about .about-scene-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  margin-top: 56px;
}

.page-about .about-scene-block {
  border-top: var(--hair-strong);
  padding-top: 24px;
}

.page-about .about-scene-index {
  display: block;
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-about .about-scene-title {
  margin: 16px 0 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: var(--fs-32);
  line-height: 1.3;
  color: var(--warm-white);
}

.page-about .about-scene-block p {
  margin: 16px 0 0;
  max-width: 42em;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--warm-gray);
}

.page-about .about-scene-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}

.page-about .about-scene-list li {
  position: relative;
  padding: 10px 0 10px 20px;
  font-size: var(--fs-14);
  color: var(--warm-white);
  border-bottom: var(--hair-faint);
}

.page-about .about-scene-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 8px;
  height: 1px;
  background: var(--lafite-bright);
}

.page-about .about-scene-figure {
  aspect-ratio: 14 / 9;
  margin: 56px 0 0;
  border: var(--hair-faint);
}

.page-about .about-scene-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 规范与记录 ---------- */
.page-about .about-standards-lede {
  margin-top: 20px;
  max-width: 42em;
}

.page-about .about-rule-groups {
  margin-top: 48px;
  border-top: var(--hair-strong);
}

.page-about .about-rule-group {
  border-bottom: var(--hair-faint);
}

.page-about .about-rule-summary {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 24px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-rule-tag {
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--gold);
  white-space: nowrap;
}

.page-about .about-rule-title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: var(--fs-24);
  color: var(--warm-white);
}

.page-about .about-rule-group[open] .about-rule-title {
  color: var(--gold-light);
}

.page-about .about-rule-list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
}

.page-about .about-rule-list li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-top: var(--hair-faint);
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--warm-gray);
}

.page-about .about-rule-key {
  color: var(--mist);
  letter-spacing: 0.08em;
}

/* ---------- 下一步 ---------- */
.page-about .about-next-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about .about-next-links {
  display: grid;
  gap: 0;
  border-top: var(--hair-strong);
}

.page-about .about-next-link {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 6px 16px;
  padding: 24px 0;
  border-bottom: var(--hair-faint);
  text-decoration: none;
  transition: background-color 0.3s var(--ease);
}

.page-about .about-next-link:hover,
.page-about .about-next-link:focus-visible {
  background-color: rgba(123, 30, 43, 0.16);
}

.page-about .about-next-index {
  grid-row: 1 / 3;
  font-size: var(--fs-14);
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .about-next-name {
  font-family: var(--serif);
  font-weight: 700;
  font-size: var(--fs-24);
  color: var(--warm-white);
}

.page-about .about-next-desc {
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--warm-gray);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-bottom: var(--hair-faint);
  }

  .page-about .about-fact {
    border-bottom: none;
    border-right: var(--hair-faint);
    padding-right: 24px;
  }

  .page-about .about-fact:nth-child(2n) {
    border-right: none;
    padding-left: 24px;
  }

  .page-about .about-cap-item {
    grid-template-columns: 140px 1fr;
    gap: 6px 24px;
    align-items: baseline;
  }

  .page-about .about-cap-note {
    grid-column: 2;
  }

  .page-about .about-tl-summary {
    grid-template-columns: auto 1fr auto;
    gap: 8px 20px;
  }

  .page-about .about-tl-stage {
    grid-column: 3;
    text-align: right;
  }

  .page-about .about-next-link {
    grid-template-columns: 56px 1fr;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding-top: 64px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 64px;
    align-items: start;
  }

  .page-about .about-hero-aside {
    padding-top: 72px;
  }

  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 96px;
  }

  .page-about .about-fact {
    flex-direction: column;
    gap: 8px;
    padding: 24px 24px 24px 0;
  }

  .page-about .about-fact:nth-child(2n) {
    padding-left: 0;
  }

  .page-about .about-fact:not(:first-child) {
    padding-left: 24px;
  }

  .page-about .about-fact:last-child {
    border-right: none;
  }

  .page-about .about-origin-grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 3fr);
    gap: 64px;
  }

  .page-about .about-origin-aside {
    padding-top: 56px;
  }

  .page-about .about-timeline-grid {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 64px;
    margin-top: 72px;
  }

  .page-about .about-rail {
    position: sticky;
    top: 96px;
    align-self: start;
    border-top: none;
    border-left: var(--hair-strong);
    padding: 0 0 0 20px;
  }

  .page-about .about-rail-list {
    flex-direction: column;
    gap: 16px;
  }

  .page-about .about-tl-node {
    padding-left: 40px;
    padding-bottom: 40px;
  }

  .page-about .about-cap-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 64px;
    align-items: start;
  }

  .page-about .about-cap-figure {
    margin-top: 88px;
    position: sticky;
    top: 96px;
  }

  .page-about .about-scene-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 64px;
    margin-top: 72px;
  }

  .page-about .about-scene-figure {
    margin-top: 72px;
  }

  .page-about .about-rule-list li {
    grid-template-columns: 80px 1fr;
  }

  .page-about .about-next-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 80px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-cap-item,
  .page-about .about-cap-note,
  .page-about .about-next-link {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>