.page-about {
  --about-index-w: 190px;
  --about-gutter: clamp(1.5rem, 3.5vw, 3.25rem);
  background: var(--paper);
  color: var(--ink);
  padding-bottom: clamp(3rem, 7vw, 5.5rem);
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + clamp(1.75rem, 5vw, 3.5rem)) 0 clamp(2.25rem, 5vw, 3.75rem);
  background:
    radial-gradient(110% 85% at 12% 0%, rgba(212, 162, 76, 0.2), transparent 58%),
    radial-gradient(95% 75% at 102% 6%, rgba(200, 52, 43, 0.24), transparent 56%),
    var(--ink);
  color: var(--paper);
  border-bottom: 1px solid var(--line-ink);
}

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

.page-about .about-hero .breadcrumbs__list {
  font-size: 0.8rem;
}

.page-about .about-hero .breadcrumbs a {
  color: rgba(245, 239, 227, 0.72);
  text-decoration: none;
}

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

.page-about .about-hero__kicker {
  margin: clamp(1.4rem, 3vw, 2.2rem) 0 0.9rem;
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  color: var(--gold-soft);
}

.page-about .about-hero__kicker .mono {
  display: inline-block;
  margin-right: 0.55rem;
  padding: 0.15rem 0.5rem;
  border: 1px solid rgba(212, 162, 76, 0.5);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 5.6vw, 3.9rem);
  line-height: 1.16;
  letter-spacing: -0.015em;
}

.page-about .about-hero__lead {
  max-width: 44rem;
  margin: 1.15rem 0 0;
  font-size: clamp(0.98rem, 1.4vw, 1.12rem);
  line-height: 1.85;
  color: rgba(245, 239, 227, 0.82);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem 1rem;
  margin: clamp(1.75rem, 4vw, 2.6rem) 0 0;
  padding: clamp(1.1rem, 2.5vw, 1.6rem) 0 0;
  list-style: none;
  border-top: 1px solid var(--line-ink);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.4vw, 2.15rem);
  line-height: 1.1;
  color: var(--gold);
}

.page-about .about-stat__num em {
  font-style: normal;
  font-size: 0.55em;
  margin-left: 0.15rem;
  color: var(--gold-soft);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: rgba(245, 239, 227, 0.7);
}

/* 章节刻度尺 + 内容流 */
.page-about .about-shell {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  padding-top: clamp(1.75rem, 4vw, 3rem);
}

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

.page-about .about-index__title {
  margin: 0 0 0.7rem;
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  color: var(--fog);
}

.page-about .about-index__list {
  display: flex;
  gap: 0.5rem;
  margin: 0;
  padding: 0 0 0.35rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: var(--paper-2);
  color: var(--graphite);
  font-size: 0.84rem;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-index__link .mono {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--red);
}

.page-about .about-index__link:hover {
  border-color: var(--gold);
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-index__link:focus-visible {
  outline: none;
  box-shadow: var(--focus);
}

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

/* 章节通用 */
.page-about .about-chapter {
  padding: clamp(1.75rem, 3.6vw, 2.75rem) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-flow > .about-chapter:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-chapter__head {
  max-width: 46rem;
}

.page-about .eyebrow {
  margin: 0 0 0.55rem;
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  color: var(--red);
  font-weight: 600;
}

.page-about .eyebrow .mono {
  font-family: var(--font-mono);
  margin-right: 0.5rem;
  color: var(--gold);
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.45rem, 3vw, 2.15rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.page-about .about-chapter__lead {
  margin: 0.85rem 0 0;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--graphite);
}

.page-about .prose p {
  margin: 0 0 0.9rem;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--graphite);
}

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

.page-about .prose a {
  color: var(--red);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-about .prose a:hover {
  color: var(--red-dark);
}

.page-about .prose a:focus-visible {
  outline: none;
  box-shadow: var(--focus);
  border-radius: 3px;
}

/* 宽幅图文 */
.page-about .about-split {
  display: grid;
  gap: clamp(1.2rem, 3vw, 2.25rem);
  margin-top: 1.35rem;
}

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

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  background: var(--paper-2);
  box-shadow: var(--shadow-soft);
  object-fit: cover;
}

.page-about .about-figure figcaption {
  margin-top: 0.7rem;
  font-size: 0.79rem;
  line-height: 1.7;
  color: var(--graphite);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.7rem;
  margin: 1.6rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-fact {
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--paper-2);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .about-fact:hover {
  border-color: var(--gold);
  transform: translateY(-2px);
}

.page-about .about-fact__k {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--fog);
}

.page-about .about-fact__v {
  margin: 0.3rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ink);
}

.page-about .about-fact--accent {
  background: var(--ink);
  border-color: var(--ink);
}

.page-about .about-fact--accent .about-fact__k {
  color: rgba(245, 239, 227, 0.66);
}

.page-about .about-fact--accent .about-fact__v {
  color: var(--gold);
}

/* 窄栏流程 */
.page-about .about-chapter--narrow > * {
  max-width: 40rem;
}

.page-about .about-figure--process {
  margin-top: 1.35rem;
}

.page-about .about-figure--process img {
  border-radius: var(--radius-md);
  box-shadow: none;
  border: 1px solid var(--line);
}

.page-about .about-steps {
  display: grid;
  gap: 0.7rem;
  margin: 1.35rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-step {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s var(--ease);
}

.page-about .about-step:hover,
.page-about .about-step:focus-within {
  border-color: var(--teal);
}

.page-about .about-step summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.95rem 1.05rem;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--ink);
  list-style: none;
}

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

.page-about .about-step summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--teal);
}

.page-about .about-step details[open] summary::after {
  content: "－";
}

.page-about .about-step summary:focus-visible {
  outline: none;
  box-shadow: var(--focus);
}

.page-about .about-step__no {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 0.1rem 0.45rem;
  border-radius: var(--radius-pill);
  background: var(--ink);
  color: var(--gold);
}

.page-about .about-step__body {
  padding: 0 1.05rem 1.05rem 1.05rem;
  border-top: 1px solid var(--line);
  margin-top: 0.2rem;
  padding-top: 0.8rem;
}

.page-about .about-step__body p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--graphite);
}

/* 深色版本章节 */
.page-about .about-chapter--dark {
  margin: clamp(1.25rem, 3vw, 2rem) 0;
  padding: clamp(1.4rem, 3.4vw, 2.5rem);
  border-top: 0;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(160deg, rgba(212, 162, 76, 0.12), transparent 42%),
    var(--ink-soft);
  color: var(--paper);
}

.page-about .about-eyebrow--onDark {
  color: var(--gold-soft);
}

.page-about .about-chapter--dark .about-chapter__title {
  color: var(--paper);
}

.page-about .about-chapter--dark .about-chapter__lead {
  color: rgba(245, 239, 227, 0.78);
}

.page-about .about-track {
  display: grid;
  gap: 0.85rem;
  margin: 1.6rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-track__item {
  padding: 1.05rem 1.1rem;
  border: 1px solid var(--line-ink);
  border-radius: var(--radius-md);
  background: rgba(245, 239, 227, 0.04);
  transition: transform 0.22s var(--ease), background 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-about .about-track__item::before {
  content: "";
  display: block;
  width: 2.2rem;
  height: 3px;
  margin-bottom: 0.75rem;
  border-radius: 2px;
  background: var(--gold);
}

.page-about .about-track__item:hover,
.page-about .about-track__item:focus-within {
  transform: translateY(-3px);
  background: rgba(245, 239, 227, 0.09);
  border-color: rgba(212, 162, 76, 0.62);
}

.page-about .about-track__item--now::before {
  background: var(--red);
}

.page-about .about-track__era {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--gold-soft);
}

.page-about .about-track__title {
  margin: 0.45rem 0 0;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-track__desc {
  margin: 0.45rem 0 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: rgba(245, 239, 227, 0.82);
}

.page-about .about-track__more {
  margin: 0.7rem 0 0;
  padding-top: 0.7rem;
  border-top: 1px dashed rgba(245, 239, 227, 0.24);
  font-size: 0.85rem;
  line-height: 1.75;
  color: rgba(245, 239, 227, 0.66);
  transition: color 0.22s var(--ease);
}

.page-about .about-track__item:hover .about-track__more {
  color: var(--gold-soft);
}

.page-about .about-figure--track {
  margin-top: 1.4rem;
}

.page-about .about-figure--track img {
  border-radius: var(--radius-md);
}

.page-about .about-figure--track figcaption {
  color: rgba(245, 239, 227, 0.62);
}

/* 栏目矩阵 */
.page-about .about-directory {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.page-about .about-directory__card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 1.05rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--paper-2);
  color: var(--ink);
  text-decoration: none;
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .about-directory__card:hover {
  transform: translateY(-3px);
  border-color: var(--red);
  box-shadow: var(--shadow-soft);
}

.page-about .about-directory__card:focus-visible {
  outline: none;
  box-shadow: var(--focus);
}

.page-about .about-directory__no {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .about-directory__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
}

.page-about .about-directory__desc {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.75;
  color: var(--graphite);
}

.page-about .about-directory__card .pill {
  margin-top: auto;
  font-size: 0.73rem;
}

/* 团队 */
.page-about .about-team {
  display: grid;
  gap: clamp(1.2rem, 3vw, 2.25rem);
}

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

.page-about .about-team__list {
  display: grid;
  gap: 0.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
  align-content: start;
}

.page-about .about-team__item {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.8rem 0.95rem;
  border-left: 3px solid var(--teal);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--paper-2);
}

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1;
  flex: 0 0 auto;
}

.page-about .about-team__text {
  font-size: 0.87rem;
  line-height: 1.7;
  color: var(--graphite);
}

.page-about .about-team__item--honor {
  border-left-color: var(--gold);
  background: var(--ink);
}

.page-about .about-team__item--honor .about-team__text {
  color: var(--gold-soft);
  font-weight: 600;
}

/* 结尾入口 */
.page-about .about-next {
  margin-top: clamp(1.5rem, 3.5vw, 2.5rem);
  padding-top: clamp(1.5rem, 3.5vw, 2.25rem);
  border-top: 1px solid var(--line);
}

.page-about .about-next__title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.25rem, 2.4vw, 1.65rem);
}

.page-about .about-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.8rem;
}

.page-about .about-next__card {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.05rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--paper-2);
  color: var(--ink);
  text-decoration: none;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-next__card:hover {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-next__card:focus-visible {
  outline: none;
  box-shadow: var(--focus);
}

.page-about .about-next__k {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--red);
}

.page-about .about-next__card:hover .about-next__k {
  color: var(--gold);
}

.page-about .about-next__name {
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.6;
}

.page-about .about-next__desc {
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--graphite);
}

.page-about .about-next__card:hover .about-next__desc {
  color: rgba(245, 239, 227, 0.78);
}

.page-about .about-next__card--lead {
  background: var(--red);
  border-color: var(--red);
  color: var(--paper);
}

.page-about .about-next__card--lead .about-next__k {
  color: var(--gold-soft);
}

.page-about .about-next__card--lead .about-next__desc {
  color: rgba(255, 255, 255, 0.86);
}

.page-about .about-next__card--lead:hover {
  background: var(--red-dark);
  border-color: var(--red-dark);
}

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

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

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

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

@media (min-width: 760px) {
  .page-about .about-track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.9rem;
    align-items: start;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

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

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

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

  .page-about .about-next__card--lead {
    grid-column: span 2;
    justify-content: center;
  }
}

@media (min-width: 960px) {
  .page-about .about-shell {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    gap: var(--about-gutter);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
  }

  .page-about .about-index__list {
    display: block;
    overflow: visible;
    padding: 0;
    border-left: 2px solid var(--line);
  }

  .page-about .about-index__list li + li {
    margin-top: 0.1rem;
  }

  .page-about .about-index__link {
    display: flex;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    background: transparent;
    margin-left: -2px;
    padding: 0.5rem 0 0.5rem 0.95rem;
    white-space: normal;
    font-size: 0.88rem;
  }

  .page-about .about-index__link:hover {
    border-left-color: var(--red);
    background: transparent;
  }

  .page-about .about-index__link:focus-visible {
    box-shadow: var(--focus);
    border-radius: var(--radius-sm);
  }

  .page-about .about-chapter--wide .about-chapter__head {
    max-width: 48rem;
  }
}

@media (hover: none) {
  .page-about .about-fact:hover,
  .page-about .about-track__item:hover,
  .page-about .about-directory__card:hover {
    transform: none;
  }
}
<<<END>>>