.page-about {
  background: var(--ink-800);
  color: var(--fog-200);
}

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

/* ============ 首屏 ============ */
.page-about .about-hero-shell {
  padding-top: clamp(20px, 3.6vw, 40px);
  padding-bottom: clamp(28px, 5vw, 56px);
}

.page-about .breadcrumb {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--fog-400);
  margin-bottom: clamp(20px, 3vw, 32px);
  display: flex;
  gap: 10px;
  align-items: center;
}

.page-about .breadcrumb a {
  color: var(--fog-400);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  color: var(--cyan-400);
}

.page-about .about-hero {
  display: grid;
  gap: clamp(20px, 4vw, 40px);
  grid-template-columns: 1fr;
  align-items: end;
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 56px);
  }
}

.page-about .about-hero-copy .eyebrow {
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan-400);
  margin: 0 0 14px;
}

.page-about .page-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 4.4vw, 54px);
  line-height: 1.14;
  letter-spacing: -0.012em;
  color: var(--paper-050);
  margin: 0 0 18px;
  max-width: 16em;
}

.page-about .page-deck {
  font-size: clamp(16px, 1.25vw, 19px);
  line-height: 1.78;
  color: var(--fog-200);
  max-width: 32em;
  margin: 0;
}

.page-about .about-hero-figure {
  margin: 0;
  position: relative;
  clip-path: polygon(0 6%, 100% 0, 100% 94%, 0 100%);
  background: var(--moss-700);
  overflow: hidden;
}

.page-about .about-hero-figure img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-hero-figure figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 20px 18px 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--fog-200);
  background: linear-gradient(to top, rgba(8, 23, 19, 0.92), rgba(8, 23, 19, 0));
}

/* ============ 杂志式三栏骨架 ============ */
.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 4vw, 0px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

@media (min-width: 900px) {
  .page-about .about-layout {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }
}

.page-about .about-rail {
  border-top: 1px solid var(--moss-600);
  padding-top: 16px;
  order: -1;
}

@media (min-width: 900px) {
  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    align-self: start;
    max-height: calc(100vh - var(--header-h) - 40px);
    overflow-y: auto;
    border-top: 1px solid var(--moss-600);
    border-left: 1px solid var(--moss-600);
    padding: 16px 0 16px 18px;
  }
}

.page-about .rail-label {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fog-400);
  margin: 0 0 14px;
  font-weight: 600;
}

.page-about .rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: railidx;
  display: grid;
  gap: 2px;
}

.page-about .rail-list li {
  counter-increment: railidx;
}

.page-about .rail-list a {
  display: block;
  padding: 8px 8px 8px 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--fog-200);
  text-decoration: none;
  border-left: 2px solid transparent;
  padding-left: 12px;
  transition: color 180ms var(--ease-out), border-color 180ms var(--ease-out), background-color 180ms var(--ease-out);
}

.page-about .rail-list a::before {
  content: counter(railidx, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fog-400);
  margin-right: 8px;
  letter-spacing: 0.06em;
}

.page-about .rail-list a:hover {
  color: var(--cyan-400);
  border-left-color: var(--cyan-600);
  background: var(--moss-700);
}

@media (min-width: 900px) {
  .page-about .about-rail .rail-list {
    grid-template-columns: 1fr;
  }
}

/* ============ 章节通用 ============ */
.page-about .about-content {
  min-width: 0;
}

.page-about .about-chapter {
  padding-block: clamp(32px, 5vw, 60px);
  border-top: 1px solid var(--moss-600);
}

.page-about .about-chapter:first-of-type {
  border-top: 0;
  padding-top: clamp(16px, 2.4vw, 28px);
}

.page-about .chapter-heading {
  position: relative;
  padding-left: 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 2.6vw, 34px);
  line-height: 1.28;
  letter-spacing: -0.005em;
  color: var(--paper-050);
  margin: 0 0 18px;
}

.page-about .chapter-heading::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: var(--cyan-400);
  transform: scaleY(0.18);
  transform-origin: top center;
  transition: transform 320ms var(--ease-out);
}

.page-about .about-chapter.is-visible .chapter-heading::before {
  transform: scaleY(1);
}

.page-about .chapter-lead {
  font-size: 16px;
  line-height: 1.78;
  color: var(--fog-200);
  max-width: 34em;
  margin: 0 0 24px;
}

/* ============ 时间线 ============ */
.page-about .timeline-wrap {
  position: relative;
  overflow: hidden;
  background: var(--moss-700);
  padding: clamp(20px, 3vw, 32px) clamp(16px, 3vw, 32px);
  margin-top: 8px;
}

.page-about .timeline-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
  z-index: 0;
  filter: grayscale(0.35);
}

.page-about .timeline {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: var(--stone-300);
  opacity: 0.7;
}

.page-about .timeline li {
  position: relative;
  padding: 0 0 26px;
}

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

.page-about .timeline li::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--cyan-400);
  transform: rotate(45deg);
}

.page-about .timeline-year {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--cyan-400);
  margin-bottom: 6px;
}

.page-about .timeline-title {
  display: block;
  font-weight: 600;
  font-size: clamp(17px, 1.8vw, 20px);
  color: var(--paper-050);
  margin-bottom: 4px;
  line-height: 1.4;
}

.page-about .timeline-desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--fog-200);
  max-width: 34em;
}

/* ============ 团队分工 5:3:4 ============ */
.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 760px) {
  .page-about .team-grid {
    grid-template-columns: 5fr 3fr 4fr;
    gap: 0;
  }
}

.page-about .team-col {
  background: var(--moss-700);
  border: 1px solid var(--moss-600);
  padding: clamp(16px, 2.2vw, 26px);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

@media (min-width: 760px) {
  .page-about .team-col + .team-col {
    border-left: 0;
  }
  .page-about .team-col--md {
    background: transparent;
  }
  .page-about .team-col--sm {
    background: var(--moss-700);
  }
}

.page-about .team-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--moss-600);
}

.page-about .team-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 1.8vw, 20px);
  color: var(--paper-050);
  letter-spacing: -0.005em;
}

.page-about .team-mark {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--amber-500);
}

.page-about .team-body {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--fog-200);
}

.page-about .team-bullets {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  margin-top: auto;
}

.page-about .team-bullets li {
  position: relative;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--fog-200);
  padding-left: 14px;
}

.page-about .team-bullets li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 6px;
  height: 6px;
  background: var(--cyan-600);
  transform: rotate(45deg);
}

/* ============ 单场信息标准 ============ */
.page-about .match-standards {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--moss-600);
}

.page-about .ms-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 16px 0;
  border-bottom: 1px solid var(--moss-600);
}

.page-about .ms-index {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--amber-500);
  padding-top: 4px;
}

.page-about .ms-copy {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .ms-label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--paper-050);
  letter-spacing: 0;
}

.page-about .ms-desc {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--fog-200);
  max-width: 34em;
}

/* ============ 数据来源 ============ */
.page-about .data-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3.4vw, 40px);
  align-items: start;
}

@media (min-width: 760px) {
  .page-about .data-layout {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }
}

.page-about .data-text p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--fog-200);
  margin: 0 0 16px;
  max-width: 34em;
}

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

.page-about .data-figure {
  margin: 0;
  position: relative;
  background: var(--moss-700);
  overflow: hidden;
}

.page-about .data-figure img {
  width: 100%;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  filter: saturate(0.85);
}

.page-about .data-figure figcaption {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--fog-400);
  padding: 10px 2px 0;
  border-top: 1px solid var(--moss-600);
  margin-top: 10px;
}

/* ============ 覆盖数据 ============ */
.page-about .coverage-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--moss-600);
  margin: 8px 0 24px;
  border: 1px solid var(--moss-600);
}

@media (min-width: 720px) {
  .page-about .coverage-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .stat-cell {
  background: var(--paper-050);
  color: var(--ink-800);
  padding: clamp(16px, 2.4vw, 28px);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 6px;
  min-height: 108px;
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(32px, 5vw, 64px);
  line-height: 0.94;
  color: var(--ink-900);
  letter-spacing: -0.03em;
}

.page-about .stat-num sup {
  font-size: 0.34em;
  font-weight: 700;
  vertical-align: 0.42em;
  margin-left: 3px;
  color: var(--cyan-600);
  letter-spacing: 0;
}

.page-about .stat-label {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--moss-700);
}

.page-about .audience-notes p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--fog-200);
  margin: 0 0 16px;
  max-width: 34em;
}

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

/* ============ 结语收窄 ============ */
.page-about .about-chapter--tail {
  padding-bottom: clamp(48px, 7vw, 80px);
}

.page-about .about-tail {
  max-width: 30em;
  border-left: 1px solid var(--moss-600);
  padding-left: clamp(16px, 2.4vw, 24px);
}

.page-about .about-tail p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--fog-200);
  margin: 0 0 16px;
}

.page-about .about-tail-note {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.04em;
  color: var(--cyan-400) !important;
  padding: 12px 0;
  border-top: 1px solid var(--moss-600);
  border-bottom: 1px solid var(--moss-600);
  margin: 20px 0 20px !important;
}

.page-about .about-tail .btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  border: 1px solid var(--cyan-400);
  color: var(--cyan-400);
  background: transparent;
  transition: background-color 180ms var(--ease-out), color 180ms var(--ease-out);
}

.page-about .about-tail .btn:hover {
  background: var(--cyan-400);
  color: var(--ink-900);
}

.page-about .text-link {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-600);
  padding-bottom: 1px;
  transition: color 160ms var(--ease-out), border-color 160ms var(--ease-out);
}

.page-about .text-link:hover {
  color: var(--paper-050);
  border-bottom-color: var(--cyan-400);
}

/* ============ 动效降级 ============ */
@media (prefers-reduced-motion: reduce) {
  .page-about .chapter-heading::before {
    transform: scaleY(1);
    transition: none;
  }
  .page-about .rail-list a,
  .page-about .about-tail .btn,
  .page-about .text-link {
    transition: none;
  }
}
</main>