.page-about {
  --about-axis: 6px;
  --about-node-pad: 28px;
  --about-ink-text: #16171a;
  overflow-x: clip;
}

.page-about .breadcrumb {
  padding-top: 1.75rem;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding-block: 1.25rem clamp(2.5rem, 6vw, 4.5rem);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -2rem 0 auto 0;
  height: 340px;
  z-index: -1;
  background: radial-gradient(58% 100% at 16% 0%, rgba(201, 164, 92, .13), transparent 72%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
}

.page-about .about-hero__note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .28em;
  color: var(--gold);
  text-transform: uppercase;
}

.page-about .about-hero h1 {
  margin: .25em 0 .2em;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(2.2rem, 7vw, 3.9rem);
  line-height: 1.12;
  letter-spacing: .06em;
  color: var(--text);
}

.page-about .about-hero__sub {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1rem, 2.4vw, 1.32rem);
  letter-spacing: .1em;
  color: var(--gold-lt);
}

.page-about .about-hero__rule {
  display: block;
  width: 72px;
  height: 1px;
  margin: 1.4rem 0 1.2rem;
  background: linear-gradient(90deg, var(--gold), transparent);
}

.page-about .about-hero__intro {
  max-width: 36em;
  margin: 0;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text-body);
}

.page-about .hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .7rem 1.9rem;
  margin: 2rem 0 0;
  padding: 1.15rem 0 0;
  list-style: none;
  border-top: 1px solid var(--line-gold);
  font-size: .86rem;
  color: var(--text-body);
}

.page-about .hero-meta .mono {
  margin-right: .5rem;
  font-size: .68rem;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-about .hero-meta__link a {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}

.page-about .hero-meta__link a:hover,
.page-about .hero-meta__link a:focus-visible {
  color: var(--gold-lt);
  border-color: var(--gold);
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 2.5rem;
    align-items: start;
  }

  .page-about .about-hero__note {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: .42em;
    padding-top: .5rem;
  }
}

/* ---------- 时间走廊 ---------- */
.page-about .about-journey {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
}

.page-about .year-index {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .year-index a {
  display: block;
  padding: .55rem .8rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .18em;
  color: var(--text-dim);
  text-decoration: none;
  border: 1px solid var(--line-soft);
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}

.page-about .year-index a:hover,
.page-about .year-index a:focus-visible {
  color: var(--gold-lt);
  border-color: var(--gold);
  background: rgba(201, 164, 92, .09);
}

.page-about .about-journey__body h2,
.page-about .about-layers__head h2,
.page-about .about-lines__head h2,
.page-about .about-close__text h2,
.page-about .about-team__text h2 {
  margin: .5rem 0 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.55rem, 3.6vw, 2.25rem);
  line-height: 1.35;
  letter-spacing: .05em;
  color: var(--text);
}

.page-about .about-journey__lede,
.page-about .about-layers__lede,
.page-about .about-team__text > p {
  max-width: 34em;
  margin: 1rem 0 0;
  font-size: .98rem;
  line-height: 1.9;
  color: var(--text-body);
}

.page-about .timeline {
  position: relative;
  margin-top: 2.25rem;
  padding-left: var(--about-node-pad);
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: var(--about-axis);
  top: .5rem;
  bottom: .5rem;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(201, 164, 92, .34) 60%, transparent 100%);
}

.page-about .tl-node {
  position: relative;
  padding: 0 0 1.7rem;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .tl-node + .tl-node {
  padding-top: 1.7rem;
}

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 8px;
  width: 9px;
  height: 9px;
  background: var(--ink);
  border: 1px solid var(--gold);
  transform: rotate(45deg);
}

.page-about .tl-node + .tl-node::before {
  top: 35px;
}

.page-about .tl-node__year {
  margin: 0;
  font-size: .82rem;
  letter-spacing: .22em;
  color: var(--gold);
}

.page-about .tl-node h3 {
  margin: .45rem 0 .6rem;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.1rem, 2.4vw, 1.35rem);
  line-height: 1.5;
  letter-spacing: .04em;
  color: var(--text);
}

.page-about .tl-node__text,
.page-about .tl-node__detail p {
  max-width: 36em;
  margin: 0;
  font-size: .95rem;
  line-height: 1.9;
  color: var(--text-body);
}

.page-about .tl-node__more {
  margin-top: .95rem;
}

.page-about .tl-node__more summary {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .35rem .75rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  color: var(--steel);
  border: 1px solid var(--line-soft);
  transition: color .2s ease, border-color .2s ease;
}

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

.page-about .tl-node__more summary::before {
  content: "+";
  color: var(--gold);
}

.page-about .tl-node__more[open] summary::before {
  content: "—";
}

.page-about .tl-node__more summary:hover,
.page-about .tl-node__more summary:focus-visible {
  color: var(--gold-lt);
  border-color: var(--line-gold);
}

.page-about .tl-node__detail {
  margin-top: .75rem;
  padding-left: .9rem;
  border-left: 1px solid var(--line-gold);
}

.page-about .about-journey__figure {
  margin: 2.5rem 0 0;
}

.page-about .about-journey__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-gold);
}

@media (min-width: 960px) {
  .page-about .about-journey {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 3.5rem;
  }

  .page-about .about-journey__index {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .year-index {
    flex-direction: column;
    gap: 0;
    margin-top: 1.25rem;
  }

  .page-about .year-index a {
    border: 0;
    border-left: 1px solid var(--line-soft);
    padding: .62rem 0 .62rem 1rem;
  }
}

/* ---------- 三层体系 ---------- */
.page-about .about-layers__head {
  max-width: 46rem;
}

.page-about .layer-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin: 2.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .layer {
  position: relative;
  padding: 1.5rem 1.35rem 1.6rem;
  background: var(--ink-2);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .layer::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 38px;
  height: 2px;
  background: var(--gold);
}

.page-about .layer__num {
  margin: 0;
  font-size: .74rem;
  letter-spacing: .2em;
  color: var(--gold);
}

.page-about .layer h3 {
  margin: .6rem 0 .55rem;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.16rem;
  letter-spacing: .05em;
  color: var(--text);
}

.page-about .layer p {
  margin: 0;
  font-size: .93rem;
  line-height: 1.85;
  color: var(--text-body);
}

@media (min-width: 820px) {
  .page-about .layer-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
    padding-bottom: 2rem;
  }

  .page-about .layer:nth-child(2) {
    transform: translateY(1.9rem);
  }

  .page-about .layer:nth-child(3) {
    transform: translateY(.9rem);
  }
}

/* ---------- 产品线档案 ---------- */
.page-about .about-lines__inner {
  position: relative;
  padding: clamp(1.5rem, 4vw, 3rem);
  background: linear-gradient(155deg, var(--teal) 0%, #0d2c2c 62%, var(--ink-2) 100%);
  border: 1px solid rgba(201, 164, 92, .26);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}

.page-about .about-lines__head {
  max-width: 44rem;
}

.page-about .about-lines__lede {
  margin: 1rem 0 0;
  font-size: .96rem;
  line-height: 1.9;
  color: rgba(234, 217, 174, .78);
}

.page-about .about-lines__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

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

.page-about .about-lines__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid rgba(201, 164, 92, .34);
}

.page-about .about-lines__figure .media-frame__caption {
  color: rgba(234, 217, 174, .62);
}

.page-about .pl-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .9rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .pl-card {
  padding: 1.15rem 1.1rem 1.2rem;
  background: rgba(10, 10, 12, .34);
  border: 1px solid rgba(234, 217, 174, .16);
  transition: transform .25s ease, border-color .25s ease, background .25s ease;
}

.page-about .pl-card:hover,
.page-about .pl-card:focus-within {
  transform: translateY(-3px);
  border-color: var(--gold);
  background: rgba(10, 10, 12, .6);
}

.page-about .pl-card__code {
  margin: 0;
  font-size: .7rem;
  letter-spacing: .2em;
  color: var(--gold);
}

.page-about .pl-card h3 {
  margin: .5rem 0 .5rem;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.08rem;
  letter-spacing: .05em;
  color: var(--text);
}

.page-about .pl-card p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.8;
  color: rgba(207, 201, 186, .92);
}

.page-about .pl-card__more {
  display: block;
  margin-top: .7rem;
  padding-top: .55rem;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .1em;
  color: rgba(234, 217, 174, .42);
  border-top: 1px dashed rgba(234, 217, 174, .18);
  transition: color .25s ease;
}

.page-about .pl-card:hover .pl-card__more,
.page-about .pl-card:focus-within .pl-card__more {
  color: var(--gold-lt);
}

.page-about .about-lines__foot {
  margin: 1.75rem 0 0;
}

.page-about .about-lines__foot a {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--gold-lt);
  text-decoration: none;
  border-bottom: 1px solid var(--line-gold);
  padding-bottom: 2px;
  transition: color .2s ease, border-color .2s ease;
}

.page-about .about-lines__foot a:hover,
.page-about .about-lines__foot a:focus-visible {
  color: #fff;
  border-color: var(--gold);
}

@media (min-width: 700px) {
  .page-about .pl-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-about .about-lines__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 2rem;
    align-items: start;
  }
}

/* ---------- 运营数据 ---------- */
.page-about .about-ops {
  padding-block: clamp(2.75rem, 7vw, 4.75rem);
  background: var(--paper);
  color: var(--about-ink-text);
}

.page-about .about-ops .eyebrow {
  color: #8a6b2e;
}

.page-about .about-ops h2 {
  margin: .5rem 0 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.55rem, 3.8vw, 2.35rem);
  line-height: 1.35;
  letter-spacing: .05em;
  color: var(--about-ink-text);
}

.page-about .about-ops__lede {
  max-width: 40em;
  margin: 1rem 0 0;
  font-size: .98rem;
  line-height: 1.9;
  color: #4a4740;
}

.page-about .stat-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
  margin: 2.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .stat {
  padding: 1.2rem .25rem 0;
  border-top: 2px solid rgba(92, 31, 43, .38);
}

.page-about .stat__num {
  display: block;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(2rem, 5vw, 2.85rem);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--wine);
}

.page-about .stat__label {
  display: block;
  margin-top: .5rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  color: #5b564c;
}

.page-about .stat p {
  margin: .65rem 0 0;
  font-size: .9rem;
  line-height: 1.8;
  color: #3b3934;
}

@media (min-width: 640px) {
  .page-about .stat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem 2rem;
  }
}

@media (min-width: 960px) {
  .page-about .stat-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
}

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

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-soft);
}

.page-about .about-team__figure .media-frame__caption {
  color: var(--text-dim);
}

.page-about .team-list {
  display: grid;
  gap: 1rem;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .team-item {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: .85rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .team-item__num {
  font-size: .74rem;
  letter-spacing: .12em;
  color: var(--gold);
  padding-top: .2rem;
}

.page-about .team-item h3 {
  margin: 0 0 .4rem;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: .05em;
  color: var(--text);
}

.page-about .team-item p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.85;
  color: var(--text-body);
}

.page-about .about-team__foot {
  margin: 1.5rem 0 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line-gold);
  font-size: .92rem;
  line-height: 1.9;
  color: var(--text-dim);
}

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

.page-about .about-team__foot a:hover,
.page-about .about-team__foot a:focus-visible {
  color: #fff;
  border-color: var(--gold);
}

@media (min-width: 900px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 2.75rem;
    align-items: center;
  }
}

/* ---------- 站点信息与反馈 ---------- */
.page-about .about-close__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
  align-items: start;
}

.page-about .about-close__text > p {
  max-width: 34em;
  margin: 1rem 0 0;
  font-size: .96rem;
  line-height: 1.9;
  color: var(--text-body);
}

.page-about .about-close__facts {
  display: grid;
  gap: .65rem;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-close__facts li {
  display: flex;
  flex-wrap: wrap;
  gap: .25rem .9rem;
  padding-bottom: .65rem;
  border-bottom: 1px solid var(--line-soft);
  font-size: .9rem;
  color: var(--text-body);
}

.page-about .about-close__facts .mono {
  min-width: 5.5rem;
  font-size: .68rem;
  letter-spacing: .14em;
  color: var(--gold);
  text-transform: uppercase;
}

.page-about .about-close__gate {
  display: block;
  text-decoration: none;
}

.page-about .about-close__gate .gate-block__eyebrow {
  font-family: var(--font-mono);
  letter-spacing: .18em;
}

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

@media (min-width: 920px) {
  .page-about .about-close__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 3rem;
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .pl-card,
  .page-about .pl-card__more,
  .page-about .year-index a,
  .page-about .tl-node__more summary {
    transition: none;
  }

  .page-about .pl-card:hover,
  .page-about .pl-card:focus-within {
    transform: none;
  }

  .page-about .layer:nth-child(2),
  .page-about .layer:nth-child(3) {
    transform: none;
  }
}
<<<END>>>