.page-about {
  background: var(--ink);
  color: var(--porcelain);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(22px, 4vw, 44px);
  border-bottom: 1px solid var(--line-gold);
  background:
    repeating-linear-gradient(90deg, var(--line-gold) 0 1px, transparent 1px 140px),
    repeating-linear-gradient(0deg, var(--line-gold) 0 1px, transparent 1px 140px),
    radial-gradient(120% 90% at 10% 0%, #251a10 0%, var(--ink) 62%);
}

.page-about .about-hero__inner {
  padding-bottom: clamp(22px, 3.4vw, 36px);
}

.page-about .about-hero__kicker {
  margin: clamp(14px, 2.4vw, 26px) 0 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 6.4vw, 64px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--porcelain);
}

.page-about .about-hero__lede {
  margin: clamp(14px, 2.4vw, 22px) 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
  color: var(--warm-gray);
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(24px, 3.6vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-gold);
  border: 1px solid var(--line-gold);
}

.page-about .about-stat {
  background: var(--ink-2);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--gold-bright);
}

.page-about .about-stat__label {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--warm-gray);
}

.page-about .about-hero__media {
  margin: 0;
  border-top: 1px solid var(--line-gold);
  line-height: 0;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 460px;
  object-fit: cover;
}

/* ---------- 双栏骨架 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  padding-top: clamp(30px, 4.6vw, 60px);
  padding-bottom: clamp(44px, 6.5vw, 90px);
}

/* ---------- 目录 ---------- */
.page-about .about-index {
  border-top: 1px solid var(--line-gold);
  padding-top: 14px;
}

.page-about .about-index__title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px 12px;
}

.page-about .about-index__link {
  display: flex;
  gap: 7px;
  align-items: baseline;
  padding: 5px 0 5px 8px;
  border-left: 2px solid transparent;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--warm-gray);
  text-decoration: none;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .about-index__link .mono {
  font-size: 10.5px;
  color: var(--jade-light);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--porcelain);
  border-left-color: var(--gold);
}

.page-about .about-index__link[aria-current="location"] {
  color: var(--gold-bright);
  border-left-color: var(--gold);
}

/* ---------- 章节 ---------- */
.page-about .about-section {
  padding-bottom: clamp(34px, 5vw, 64px);
  margin-bottom: clamp(34px, 5vw, 64px);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-section--last {
  border-bottom: 0;
  margin-bottom: clamp(24px, 3.4vw, 40px);
}

.page-about .about-section__no {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--jade-light);
}

.page-about .about-section > h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--porcelain);
}

.page-about .summary-strip {
  margin: 14px 0 0;
  padding: 10px 0 10px 14px;
  border-left: 3px solid var(--gold);
  background: linear-gradient(90deg, rgba(211, 169, 59, 0.1), transparent 72%);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--gold-bright);
}

.page-about .about-prose {
  margin-top: clamp(16px, 2.4vw, 24px);
}

.page-about .about-prose--tight {
  margin-top: 18px;
}

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

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

.page-about .about-prose a {
  color: var(--jade-light);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-prose a:hover {
  color: var(--gold-bright);
}

/* ---------- 服务线 ---------- */
.page-about .service-list {
  list-style: none;
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  padding: 0;
}

.page-about .service-line {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .service-line:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .service-line__no {
  font-size: 15px;
  line-height: 1.5;
  color: var(--gold);
}

.page-about .service-line__body h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  color: var(--porcelain);
}

.page-about .service-line__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--warm-gray);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: clamp(22px, 3.2vw, 34px) 0 0;
  border: 1px solid var(--line-gold);
  background: var(--ink-2);
  padding: 8px;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 520px;
  object-fit: cover;
  filter: saturate(0.94);
}

.page-about .about-figure--square img {
  max-height: 360px;
  object-fit: cover;
}

.page-about .about-figure figcaption {
  margin-top: 8px;
  padding: 0 2px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--warm-gray);
}

/* ---------- 品质工序 ---------- */
.page-about .flow {
  list-style: none;
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .flow__step {
  background: var(--ink-2);
  padding: 18px 16px 20px;
}

.page-about .flow__no {
  display: block;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .flow__step h3 {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--porcelain);
}

.page-about .flow__step p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--warm-gray);
}

.page-about .about-seal {
  margin: clamp(26px, 3.6vw, 38px) 0 0;
  display: flex;
  align-items: center;
  gap: 16px;
}

.page-about .about-seal__mark {
  flex: 0 0 auto;
  width: 104px;
  height: 104px;
  display: block;
}

.page-about .seal-ring {
  fill: none;
  stroke: var(--gold);
  stroke-width: 1.5;
}

.page-about .seal-ring--dash {
  fill: none;
  stroke: var(--jade-light);
  stroke-width: 1;
  stroke-dasharray: 4 6;
}

.page-about .seal-arc {
  fill: none;
  stroke: var(--gold);
  stroke-width: 3;
}

.page-about .seal-word {
  fill: var(--porcelain);
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 2px;
}

.page-about .seal-year {
  fill: var(--warm-gray);
  font-family: var(--font-mono);
  font-size: 12px;
}

.page-about .about-seal figcaption {
  font-size: 13px;
  line-height: 1.75;
  color: var(--warm-gray);
}

/* ---------- 团队 ---------- */
.page-about .team-list {
  margin-top: clamp(14px, 2.2vw, 22px);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .team-row {
  border-top: 1px solid var(--line-soft);
}

.page-about .team-row__summary {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px 14px;
  padding: 15px 4px;
  cursor: pointer;
  list-style: none;
  transition: background 180ms var(--ease);
}

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

.page-about .team-row__summary:hover,
.page-about .team-row__summary:focus-visible {
  background: rgba(211, 169, 59, 0.07);
}

.page-about .team-row__num {
  min-width: 44px;
  font-size: 26px;
  line-height: 1;
  color: var(--gold);
}

.page-about .team-row__name {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--porcelain);
}

.page-about .team-row__role {
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--warm-gray);
}

.page-about .team-row__hint {
  margin-left: auto;
  font-size: 16px;
  line-height: 1;
  color: var(--jade-light);
  transition: transform 220ms var(--ease);
}

.page-about .team-row[open] .team-row__hint {
  transform: rotate(45deg);
  color: var(--gold);
}

.page-about .team-row__body {
  margin: 0;
  padding: 0 4px 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--warm-gray);
}

/* ---------- 年表 ---------- */
.page-about .timeline-wrap {
  margin-top: clamp(16px, 2.4vw, 24px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.2vw, 34px);
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), rgba(211, 169, 59, 0.12));
}

.page-about .timeline__item {
  position: relative;
  padding-bottom: clamp(20px, 3vw, 28px);
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 1px solid var(--gold);
  background: var(--ink);
  transition: background 180ms var(--ease), box-shadow 180ms var(--ease);
}

.page-about .timeline__item:hover::before {
  background: var(--gold-bright);
  box-shadow: 0 0 0 4px rgba(211, 169, 59, 0.16);
}

.page-about .timeline__year {
  margin: 0 0 5px;
  font-size: 18px;
  letter-spacing: 0.06em;
  color: var(--gold-bright);
}

.page-about .timeline__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--porcelain);
  max-width: 46ch;
}

/* ---------- 合作生态 ---------- */
.page-about .eco-grid {
  list-style: none;
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .eco-cell {
  background: var(--ink-2);
  padding: 18px 16px 20px;
}

.page-about .eco-cell__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 32px;
  line-height: 1;
  color: var(--gold-bright);
}

.page-about .eco-cell h3 {
  margin: 10px 0 6px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--porcelain);
}

.page-about .eco-cell p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--warm-gray);
}

/* ---------- 到访 ---------- */
.page-about .about-visit {
  margin-top: clamp(16px, 2.4vw, 24px);
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--line-gold);
  border-radius: var(--radius);
  background:
    linear-gradient(150deg, rgba(30, 107, 87, 0.34), rgba(33, 24, 17, 0.94) 68%),
    var(--ink-2);
  box-shadow: var(--shadow-1);
}

.page-about .about-visit__text p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--porcelain);
}

.page-about .about-visit__meta {
  list-style: none;
  margin: 16px 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--line-gold);
  display: grid;
  gap: 8px;
}

.page-about .about-visit__meta li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--porcelain);
}

.page-about .about-visit__meta .mono {
  min-width: 76px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--jade-light);
}

.page-about .about-visit__cta {
  margin: 20px 0 0;
}

/* ---------- 继续了解 ---------- */
.page-about .about-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-links__item {
  display: block;
  padding: 15px 16px;
  background: var(--ink-2);
  font-size: 14px;
  line-height: 1.7;
  color: var(--porcelain);
  text-decoration: none;
  transition: background 180ms var(--ease), color 180ms var(--ease);
}

.page-about .about-links__item .mono {
  display: block;
  margin-bottom: 3px;
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-links__item:hover,
.page-about .about-links__item:focus-visible {
  background: #2b2118;
  color: var(--gold-bright);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-hero__media img {
    max-height: 520px;
  }

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

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

@media (min-width: 900px) {
  .page-about .about-layout {
    grid-template-columns: 208px minmax(0, 1fr);
    align-items: start;
    gap: clamp(32px, 4vw, 68px);
  }

  .page-about .about-index {
    position: sticky;
    top: 96px;
    border-top: 0;
    border-left: 1px solid var(--line-gold);
    padding: 4px 0 4px 14px;
  }

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

  .page-about .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .timeline-wrap {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-figure--square {
    margin-top: 0;
  }

  .page-about .about-visit {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 28px;
  }

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

  .page-about .about-seal__mark {
    width: 120px;
    height: 120px;
  }
}

@media (min-width: 1140px) {
  .page-about .about-hero__media img {
    max-height: 600px;
  }

  .page-about .about-figure img {
    max-height: 560px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .team-row__summary,
  .page-about .team-row__hint,
  .page-about .timeline__item::before,
  .page-about .about-links__item {
    transition: none;
  }

  .page-about .timeline__item:hover::before {
    box-shadow: none;
  }
}
<<<END>>>