.page-about {
  --about-num: clamp(56px, 11vw, 132px);
  --about-gap: clamp(20px, 4vw, 44px);
}

.page-about .breadcrumb {
  padding: 20px 0 0;
}

.page-about .about-head {
  padding: clamp(18px, 3vw, 34px) 0 clamp(28px, 5vw, 56px);
  border-bottom: 1px solid var(--line-c);
}

.page-about .about-head__title {
  margin: 14px 0 18px;
  max-width: 16em;
  font-size: clamp(32px, 6.2vw, 74px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.page-about .about-head__lede {
  max-width: 42em;
  margin: 0;
  font-size: 16px;
  line-height: 1.82;
  color: var(--text-muted);
}

.page-about .about-head__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 0;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--steel-400);
}

.page-about .about-head__facts li {
  padding: 0 14px;
  border-left: 1px solid var(--line-c);
}

.page-about .about-head__facts li:first-child {
  padding-left: 0;
  border-left: 0;
}

/* 章节轨道 + 主内容 */
.page-about .about-layout {
  display: block;
}

.page-about .about-toc {
  margin-top: 6px;
  padding-top: 16px;
  border-top: 1px solid var(--line-c);
}

.page-about .about-toc__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-toc__list li {
  flex: 0 0 auto;
}

.page-about .about-toc__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 11px;
  border: 1px solid var(--line-c);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--steel-400);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease),
    background-color 0.16s var(--ease);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--text-primary);
  border-color: var(--steel-400);
}

.page-about .about-toc__num {
  color: var(--ember-500);
}

@media (min-width: 1000px) {
  .page-about .about-layout {
    display: grid;
    grid-template-columns: 190px minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: calc(var(--topbar-h) + 24px);
    margin-top: 0;
    padding-top: 0;
    border-top: 0;
  }

  .page-about .about-toc__list {
    display: block;
    padding: 0;
    overflow: visible;
  }

  .page-about .about-toc__list li {
    display: block;
  }

  .page-about .about-toc__link {
    display: block;
    padding: 10px 0 10px 14px;
    border: 0;
    border-left: 2px solid transparent;
    font-size: 13px;
    white-space: normal;
  }

  .page-about .about-toc__link:hover,
  .page-about .about-toc__link:focus-visible {
    border-left-color: var(--ember-500);
    color: var(--text-primary);
    background: rgba(255, 77, 28, 0.07);
  }
}

/* 章节通用 */
.page-about .about-sec {
  position: relative;
  padding: clamp(36px, 5vw, 72px) 0;
  border-top: 1px solid var(--line-c);
  scroll-margin-top: calc(var(--topbar-h) + 24px);
}

.page-about .about-body > .about-sec:first-child {
  border-top: 0;
  padding-top: clamp(28px, 4vw, 48px);
}

.page-about .about-sec__head {
  position: relative;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .about-sec__num {
  position: absolute;
  top: -0.42em;
  left: 0;
  font-family: var(--font-mono);
  font-size: var(--about-num);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.05em;
  color: rgba(143, 166, 184, 0.12);
  pointer-events: none;
  user-select: none;
}

.page-about .about-sec__title {
  position: relative;
  z-index: 1;
  margin: 16px 0 0;
  max-width: 18em;
  font-size: clamp(23px, 3.4vw, 40px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  font-weight: 800;
}

.page-about .prose > p {
  max-width: 42em;
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.82;
  color: var(--text-muted);
}

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

.page-about .prose strong {
  color: var(--text-primary);
  font-weight: 600;
}

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

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

.page-about .about-media--strip {
  margin: 0 0 clamp(22px, 3vw, 34px);
}

.page-about .about-media--strip img {
  height: clamp(140px, 20vw, 220px);
}

/* 01 看台立场 */
.page-about .stance {
  display: grid;
  gap: var(--about-gap);
}

@media (min-width: 860px) {
  .page-about .stance {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }
}

/* 02 时间轴 */
.page-about .tl {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--steel-700) 0%, var(--ember-500) 100%);
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 30px 34px;
}

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

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--ember-500);
  transition: background-color 0.16s var(--ease);
}

.page-about .tl__item:hover::before {
  background: var(--ember-300);
}

.page-about .tl__k {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel-400);
}

.page-about .tl__name {
  margin: 0 0 8px;
  font-size: clamp(18px, 2.2vw, 23px);
  line-height: 1.32;
  font-weight: 700;
  color: var(--text-primary);
}

.page-about .tl__desc {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
}

/* 03 团队 */
.page-about .team {
  display: grid;
  gap: 1px;
  margin-bottom: clamp(22px, 3vw, 32px);
  background: var(--line-c);
  border: 1px solid var(--line-c);
}

@media (min-width: 760px) {
  .page-about .team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .team__cell {
  padding: 20px 18px;
  background: var(--pitch-900);
}

.page-about .team__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--ember-500);
}

.page-about .team__name {
  margin: 10px 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.page-about .team__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-muted);
}

.page-about .flow {
  margin: 0 0 clamp(22px, 3vw, 32px);
  padding: 0;
  list-style: none;
  counter-reset: flowstep;
}

.page-about .flow__item {
  position: relative;
  padding: 14px 0 14px 44px;
  border-top: 1px solid var(--line-c);
}

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

.page-about .flow__item::before {
  counter-increment: flowstep;
  content: counter(flowstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 15px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ember-500);
}

.page-about .flow__item strong {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

.page-about .flow__item p {
  margin: 4px 0 0;
  max-width: 38em;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-muted);
}

/* 04 档案 */
.page-about .season-list {
  margin: 0 0 clamp(24px, 3vw, 34px);
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-c);
}

.page-about .season-list li {
  display: grid;
  gap: 4px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-c);
}

@media (min-width: 700px) {
  .page-about .season-list li {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }
}

.page-about .season-list__k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--steel-400);
}

.page-about .season-list__v {
  font-size: 15px;
  line-height: 1.72;
  color: var(--text-muted);
}

.page-about .sub-h {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--ember-500);
}

.page-about .regions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(24px, 3vw, 34px);
  padding: 0;
  list-style: none;
}

.page-about .regions li {
  padding: 6px 12px;
  border: 1px solid var(--line-c);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.page-about .series {
  display: grid;
  gap: 1px;
  background: var(--line-c);
  border: 1px solid var(--line-c);
}

@media (min-width: 760px) {
  .page-about .series {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .series__item {
  padding: 18px;
  background: var(--carbon-800);
}

.page-about .series__name {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.page-about .series__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-muted);
}

/* 05 协作 */
.page-about .stat-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  margin-bottom: clamp(22px, 3vw, 32px);
}

@media (min-width: 900px) {
  .page-about .stat-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* 06 入口 */
.page-about .about-sec--cta {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-cta {
  padding: clamp(26px, 4vw, 48px);
  background: var(--paper-100);
  color: var(--ink-950);
}

.page-about .about-cta .eyebrow {
  color: var(--steel-700);
}

.page-about .about-cta__title {
  margin: 12px 0 14px;
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--ink-950);
}

.page-about .about-cta__text {
  max-width: 40em;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel-700);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-about .about-cta__link {
  display: inline-block;
  padding: 11px 18px;
  border: 1px solid var(--ink-950);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-950);
  text-decoration: none;
  transition: background-color 0.16s var(--ease), color 0.16s var(--ease),
    border-color 0.16s var(--ease);
}

.page-about .about-cta__link:hover,
.page-about .about-cta__link:focus-visible {
  background: var(--ink-950);
  border-color: var(--ink-950);
  color: var(--paper-100);
}

.page-about .about-cta__link--primary {
  background: var(--ember-500);
  border-color: var(--ember-500);
  color: #120C08;
}

.page-about .about-cta__link--primary:hover,
.page-about .about-cta__link--primary:focus-visible {
  background: var(--ink-950);
  border-color: var(--ink-950);
  color: var(--paper-100);
}
<<<PAGE_CSS_END>>>