.page-about {
  --about-rule: rgba(201, 164, 85, 0.26);
  --about-rule-soft: rgba(201, 164, 85, 0.14);
  --about-card-bg: linear-gradient(180deg, rgba(23, 23, 28, 0.96) 0%, rgba(12, 13, 16, 0.98) 100%);
  background: var(--ink-900);
  color: var(--cream);
  font-family: var(--font-body);
}

.page-about a {
  color: var(--gold-bright);
  text-decoration: none;
}

.page-about a:hover {
  color: var(--cream);
}

/* ---------- 首屏序章 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(1.35rem, 4vw, 2.4rem) 0 clamp(2.4rem, 6vw, 4.25rem);
  background:
    radial-gradient(92% 68% at 86% -12%, rgba(58, 45, 25, 0.78), rgba(8, 9, 11, 0) 66%),
    linear-gradient(180deg, var(--ink-900) 0%, var(--ink-800) 58%, var(--ink-900) 100%);
  border-bottom: 1px solid var(--about-rule-soft);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0.55;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 0 0 clamp(1.5rem, 4vw, 2.6rem);
  padding: 0;
  list-style: none;
  font-family: var(--font-index);
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  color: var(--grey-teal);
}

.page-about .breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: 0.55rem;
  color: rgba(201, 164, 85, 0.55);
}

.page-about .breadcrumbs__item a {
  color: var(--grey-teal);
}

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

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
}

.page-about .about-kicker {
  margin: 0 0 0.85rem;
  font-family: var(--font-index);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-hero__title {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 6.4vw, 4rem);
  line-height: 1.12;
  letter-spacing: 0.02em;
  color: var(--cream);
}

.page-about .about-em {
  color: var(--gold-bright);
  border-bottom: 2px solid var(--gold);
  padding-bottom: 0.06em;
}

.page-about .about-hero__lede {
  max-width: 34em;
  margin: 0 0 1.6rem;
  font-size: clamp(1rem, 2.2vw, 1.16rem);
  line-height: 1.8;
  color: rgba(243, 232, 210, 0.82);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about .about-hero__figure {
  margin: 0;
  padding: 0.5rem;
  border: 1px solid var(--about-rule);
  background: rgba(18, 18, 22, 0.7);
  box-shadow: var(--shadow-paper);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 4;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.05);
}

.page-about .about-hero__figure figcaption {
  margin-top: 0.6rem;
  padding-left: 0.15rem;
  font-family: var(--font-index);
  font-size: 0.7rem;
  line-height: 1.6;
  letter-spacing: 0.05em;
  color: var(--grey-teal);
}

.page-about .about-hero__marks {
  display: grid;
  gap: 0.9rem;
  margin: clamp(1.75rem, 4.5vw, 2.75rem) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__marks li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.6rem;
  padding-left: 0.85rem;
  border-left: 1px solid var(--gold);
}

.page-about .about-mark__num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.32rem;
  letter-spacing: 0.02em;
  color: var(--gold-bright);
}

.page-about .about-mark__txt {
  font-size: 0.86rem;
  line-height: 1.5;
  color: var(--grey-teal);
}

/* ---------- 长卷骨架 ---------- */
.page-about .about-shell {
  display: grid;
  gap: 1.25rem;
  padding-block: clamp(1.5rem, 4vw, 2.75rem) clamp(3rem, 7vw, 5rem);
}

.page-about .about-toc {
  padding: 0.7rem 0;
  border-top: 1px solid var(--about-rule-soft);
  border-bottom: 1px solid var(--about-rule-soft);
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-toc__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-index);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--grey-teal);
}

.page-about .about-toc__list {
  display: flex;
  gap: 1rem;
  margin: 0;
  padding: 0 0 0.15rem;
  list-style: none;
}

.page-about .about-toc__link {
  display: block;
  white-space: nowrap;
  font-family: var(--font-index);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--grey-teal);
  padding-bottom: 0.2rem;
  border-bottom: 1px solid transparent;
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}

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

.page-about .about-toc__link.is-current {
  color: var(--gold-bright);
  border-bottom-color: var(--gold);
}

.page-about .about-flow {
  min-width: 0;
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  padding-block: clamp(1.9rem, 4.6vw, 3rem);
  border-top: 1px solid var(--about-rule-soft);
}

.page-about .about-chapter:first-child {
  border-top: 0;
  padding-top: 0.5rem;
}

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

.page-about .about-chapter__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.55rem 0.8rem;
  align-items: baseline;
  margin-bottom: 1.35rem;
}

.page-about .about-chapter__index {
  font-family: var(--font-index);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--gold);
  padding: 0.12rem 0.42rem;
  border: 1px solid var(--about-rule);
  border-radius: 2px;
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.42rem, 4.2vw, 2.1rem);
  line-height: 1.24;
  letter-spacing: 0.02em;
  color: var(--cream);
}

.page-about .about-chapter__note {
  grid-column: 2;
  margin: 0;
  font-family: var(--font-index);
  font-size: 0.7rem;
  letter-spacing: 0.09em;
  color: var(--grey-teal);
}

.page-about .about-prose {
  max-width: 46em;
}

.page-about .about-prose p {
  margin: 0 0 1.05rem;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(243, 232, 210, 0.82);
}

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

.page-about .about-pullquote {
  margin: 1.6rem 0 0;
  padding: 0.35rem 0 0.35rem 1.1rem;
  border-left: 2px solid var(--gold);
}

.page-about .about-pullquote p {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.02rem, 2.5vw, 1.22rem);
  line-height: 1.7;
  color: var(--gold-bright);
}

/* ---------- 三条原则 ---------- */
.page-about .about-values__intro {
  display: grid;
  gap: 1.25rem;
  margin-bottom: 1.75rem;
}

.page-about .about-values__figure {
  margin: 0;
  padding: 0.5rem;
  border: 1px solid var(--about-rule-soft);
  background: rgba(18, 18, 22, 0.66);
}

.page-about .about-values__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 4;
  object-fit: cover;
}

.page-about .about-values__figure figcaption {
  margin-top: 0.55rem;
  font-family: var(--font-index);
  font-size: 0.69rem;
  line-height: 1.6;
  color: var(--grey-teal);
}

.page-about .about-values__lede p {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.85;
  color: rgba(243, 232, 210, 0.8);
  border-top: 1px solid var(--about-rule-soft);
  padding-top: 0.9rem;
}

.page-about .about-values__list {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
  align-items: start;
}

.page-about .about-value {
  position: relative;
  padding: 1.25rem 1.15rem 1.3rem;
  border: 1px solid var(--about-rule-soft);
  background: var(--about-card-bg);
  box-shadow: var(--shadow-paper);
}

.page-about .about-value::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 46px;
  height: 2px;
  background: var(--gold);
}

.page-about .about-value__no {
  margin: 0 0 0.6rem;
  font-family: var(--font-index);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .about-value__title {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.12rem;
  line-height: 1.45;
  color: var(--cream);
}

.page-about .about-value__body {
  margin: 0 0 0.9rem;
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(243, 232, 210, 0.78);
}

.page-about .about-value__aside {
  margin: 0;
  padding-top: 0.7rem;
  border-top: 1px dashed var(--about-rule-soft);
  font-family: var(--font-index);
  font-size: 0.68rem;
  line-height: 1.65;
  letter-spacing: 0.04em;
  color: var(--grey-teal);
}

/* ---------- 发展长卷 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 1.55rem;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 0.3rem;
  top: 0.55rem;
  bottom: 0.55rem;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(201, 164, 85, 0.35) 60%, rgba(201, 164, 85, 0.08) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 1.5rem;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -1.55rem;
  top: 0.42rem;
  width: 9px;
  height: 9px;
  margin-left: 0;
  background: var(--ink-900);
  border: 1px solid var(--gold);
  transform: rotate(45deg);
}

.page-about .about-timeline__year {
  margin: 0 0 0.3rem;
  font-family: var(--font-index);
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  color: var(--gold-bright);
}

.page-about .about-timeline__body h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.04rem;
  line-height: 1.5;
  color: var(--cream);
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(243, 232, 210, 0.76);
}

.page-about .about-timeline__foot {
  margin: 1.5rem 0 0;
  padding: 0.85rem 1rem;
  border: 1px solid var(--about-rule-soft);
  border-left: 2px solid var(--gold);
  background: rgba(23, 23, 28, 0.6);
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--grey-teal);
}

/* ---------- 团队与数据 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stat {
  padding: 1rem 0.9rem 1.1rem;
  border: 1px solid var(--about-rule-soft);
  background: linear-gradient(180deg, rgba(58, 45, 25, 0.32) 0%, rgba(12, 13, 16, 0.9) 72%);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.65rem, 5vw, 2.2rem);
  line-height: 1.1;
  color: var(--gold-bright);
}

.page-about .about-stat__unit {
  display: block;
  margin-top: 0.25rem;
  font-family: var(--font-index);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--about-rule-soft);
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--grey-teal);
}

.page-about .about-note-row {
  display: grid;
  gap: 0.85rem;
  margin-top: 1.25rem;
}

.page-about .about-note-card {
  padding: 1rem 1.05rem;
  border-left: 1px solid var(--about-rule);
  background: rgba(18, 18, 22, 0.55);
}

.page-about .about-note-card h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-index);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .about-note-card p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: rgba(243, 232, 210, 0.74);
}

/* ---------- 协作与资质 ---------- */
.page-about .about-eco {
  display: grid;
  gap: 1.25rem;
}

.page-about .about-eco__figure {
  margin: 0;
  padding: 0.5rem;
  border: 1px solid var(--about-rule-soft);
  background: rgba(18, 18, 22, 0.66);
}

.page-about .about-eco__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-about .about-eco__figure figcaption {
  margin-top: 0.55rem;
  font-family: var(--font-index);
  font-size: 0.69rem;
  line-height: 1.6;
  color: var(--grey-teal);
}

.page-about .about-eco__text p {
  margin: 0 0 0.9rem;
  font-size: 0.96rem;
  line-height: 1.85;
  color: rgba(243, 232, 210, 0.8);
}

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

.page-about .about-crests {
  display: grid;
  gap: 0.6rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-crest {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--about-rule-soft);
  background: rgba(12, 13, 16, 0.7);
}

.page-about .about-crest__mark {
  flex: none;
  width: 12px;
  height: 12px;
  border: 1px solid var(--gold);
  transform: rotate(45deg);
  background: linear-gradient(135deg, rgba(201, 164, 85, 0.55), rgba(201, 164, 85, 0));
}

.page-about .about-crest__txt {
  font-size: 0.86rem;
  line-height: 1.55;
  color: rgba(243, 232, 210, 0.82);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  display: grid;
  gap: 0.9rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-next__card {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1.1rem 1.05rem 1.15rem;
  border: 1px solid var(--about-rule-soft);
  border-top: 2px solid var(--gold);
  background: var(--about-card-bg);
}

.page-about .about-next__card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.04rem;
  color: var(--cream);
}

.page-about .about-next__card p {
  margin: 0;
  flex: 1;
  font-size: 0.88rem;
  line-height: 1.75;
  color: rgba(243, 232, 210, 0.74);
}

.page-about .about-next__link {
  align-self: flex-start;
  font-family: var(--font-index);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--gold-bright);
  border-bottom: 1px solid var(--gold);
  padding-bottom: 0.12rem;
}

.page-about .about-contact {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
  padding: 1.2rem 1.1rem;
  border: 1px solid var(--about-rule);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(58, 45, 25, 0.55), rgba(8, 9, 11, 0) 70%),
    rgba(18, 18, 22, 0.8);
}

.page-about .about-contact__text h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.06rem;
  color: var(--cream);
}

.page-about .about-contact__text p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: rgba(243, 232, 210, 0.78);
}

.page-about .about-contact__lines {
  display: grid;
  gap: 0.4rem;
  font-family: var(--font-index);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--grey-teal);
}

.page-about .about-contact__lines a {
  color: var(--gold-bright);
  border-bottom: 1px solid var(--about-rule);
  padding-bottom: 0.1rem;
  justify-self: start;
  word-break: break-all;
}

.page-about .about-contact .btn {
  justify-self: start;
}

/* ---------- 响应式 ---------- */
@media (min-width: 40rem) {
  .page-about .about-hero__marks {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.1rem;
  }

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

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

  .page-about .about-crests {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 54rem) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: end;
    gap: clamp(2rem, 4vw, 3.2rem);
  }

  .page-about .about-values__intro {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    align-items: center;
    gap: 1.75rem;
  }

  .page-about .about-values__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.1rem;
  }

  .page-about .about-value:nth-child(2) {
    margin-top: 1.4rem;
  }

  .page-about .about-value:nth-child(3) {
    margin-top: 2.8rem;
  }

  .page-about .about-eco {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
    gap: 1.75rem;
  }

  .page-about .about-timeline {
    padding-left: 0;
  }

  .page-about .about-timeline::before {
    left: 6.4rem;
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: 6.4rem minmax(0, 1fr);
    gap: 1.4rem;
    padding-bottom: 1.7rem;
  }

  .page-about .about-timeline__item::before {
    left: 6.4rem;
    margin-left: -4px;
    top: 0.55rem;
  }

  .page-about .about-timeline__year {
    margin: 0;
    text-align: right;
    padding-right: 1.1rem;
  }

  .page-about .about-timeline__body {
    padding-left: 0.35rem;
  }

  .page-about .about-contact {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: center;
    gap: 1.25rem 1.75rem;
    padding: 1.5rem 1.6rem;
  }

  .page-about .about-contact .btn {
    grid-column: 1 / -1;
  }
}

@media (min-width: 62rem) {
  .page-about .about-shell {
    grid-template-columns: 186px minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.25rem);
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: calc(var(--header-h) + 1.25rem);
    align-self: start;
    overflow: visible;
    padding: 0.85rem 0 0.9rem;
  }

  .page-about .about-toc__list {
    flex-direction: column;
    gap: 0.55rem;
    padding-bottom: 0;
  }

  .page-about .about-toc__link {
    white-space: normal;
  }
}

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