.page-about {
  --about-measure: 44rem;
  --about-rule: rgba(18, 81, 63, 0.55);
  --about-ink: rgba(244, 239, 227, 0.86);
  --about-glow: rgba(0, 229, 192, 0.16);
  color: var(--c-bone);
  background: var(--c-field);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(1.5rem, 4vw, 2.5rem) 0 clamp(2.75rem, 7vw, 5rem);
  background:
    radial-gradient(120% 90% at 84% 6%, var(--about-glow), transparent 58%),
    linear-gradient(180deg, var(--c-stand) 0%, var(--c-field) 72%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    115deg,
    rgba(244, 239, 227, 0.035) 0 1px,
    transparent 1px 22px
  );
}

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

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin: 0 0 clamp(1.5rem, 4vw, 2.5rem);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-mist);
}

.page-about .breadcrumb a {
  color: var(--c-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-base) var(--ease), border-color var(--t-base) var(--ease);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--c-neon);
  border-bottom-color: var(--c-neon);
}

.page-about .hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 6vw, 3rem);
}

.page-about .hero-copy {
  min-width: 0;
}

.page-about .hero-title {
  margin: 0.55rem 0 0;
  font-size: clamp(2rem, 6.6vw, 4.3rem);
  font-weight: 800;
  line-height: 1.03;
  letter-spacing: -0.022em;
  color: var(--c-bone);
  text-wrap: balance;
}

.page-about .hero-lede {
  margin: 1.25rem 0 0;
  max-width: 40rem;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: var(--about-ink);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.page-about .hero-collage {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
  align-content: end;
  min-width: 0;
}

.page-about .hero-tile {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  min-width: 0;
  padding: 0.95rem 1.05rem;
  border-radius: var(--r-md);
  transition: border-color var(--t-base) var(--ease), transform var(--t-base) var(--ease);
}

.page-about .hero-tile:hover {
  border-color: var(--c-neon);
  transform: translateY(-2px);
}

.page-about .hero-tile--wide {
  grid-column: 1 / -1;
}

.page-about .hero-tile__num {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 4.4vw, 1.95rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--c-neon);
}

.page-about .hero-tile__num--soft {
  font-size: clamp(1.05rem, 3.4vw, 1.4rem);
  color: var(--c-neon-soft);
}

.page-about .hero-tile__label {
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.05em;
  color: var(--c-mist);
}

/* ---------- 正文骨架 ---------- */

.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  padding: clamp(2.5rem, 6vw, 4.25rem) 0 clamp(3rem, 7vw, 5rem);
}

.page-about .about-toc {
  min-width: 0;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-toc__title {
  margin: 0 0 0.6rem;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-mist);
}

.page-about .about-toc__list {
  display: flex;
  gap: 0.45rem;
  margin: 0;
  padding: 0 0 0.35rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

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

.page-about .about-toc__list a {
  display: block;
  padding: 0.38rem 0.75rem;
  border: 1px solid var(--about-rule);
  border-radius: 999px;
  font-size: 13px;
  white-space: nowrap;
  color: var(--c-mist);
  text-decoration: none;
  transition: color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease);
}

.page-about .about-toc__list a:hover,
.page-about .about-toc__list a:focus-visible {
  color: var(--c-field);
  background: var(--c-neon);
  border-color: var(--c-neon);
}

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

.page-about .flow-section {
  padding: clamp(1.75rem, 4.5vw, 3rem) 0;
  border-top: 1px solid var(--about-rule);
  scroll-margin-top: 7rem;
}

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

.page-about .narrow {
  max-width: var(--about-measure);
}

.page-about .flow-section p {
  margin: 0 0 1.05rem;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--about-ink);
}

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

.page-about .flow-section .section-title {
  margin: 0.5rem 0 1.15rem;
  max-width: 32ch;
  font-size: clamp(1.5rem, 3.8vw, 2.35rem);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--c-bone);
}

.page-about .about-flow .flow-section:nth-child(even) .section-title {
  font-weight: 200;
  letter-spacing: 0.005em;
}

/* ---------- 榜单场景卡 ---------- */

.page-about .scene-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.85rem;
  margin-top: 1.75rem;
}

.page-about .scene-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-width: 0;
  padding: 1.15rem 1.2rem 1.3rem;
  border-radius: var(--r-md);
  transition: border-color var(--t-base) var(--ease), transform var(--t-base) var(--ease);
}

.page-about .scene-card:hover {
  border-color: var(--c-neon);
  transform: translateY(-2px);
}

.page-about .scene-card__tag {
  align-self: flex-start;
}

.page-about .scene-card__title {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--c-bone);
}

.page-about .scene-card__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: var(--c-mist);
}

.page-about .index-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .index-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.7rem 0;
  border-top: 1px dashed var(--about-rule);
}

.page-about .index-list__num {
  flex: 0 0 auto;
  min-width: 7.5rem;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--c-neon);
}

.page-about .index-list__text {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--c-mist);
}

/* ---------- 图片位 ---------- */

.page-about .about-media {
  display: block;
  margin: 1.75rem 0 0;
  width: 100%;
  max-width: 100%;
}

.page-about .about-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--hair-line);
  border-radius: var(--r-md);
  background: linear-gradient(140deg, var(--c-stand), var(--c-field));
}

.page-about .about-media__caption {
  display: block;
  margin-top: 0.65rem;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.05em;
  color: var(--c-mist);
}

/* ---------- 档案三维度 ---------- */

.page-about .dims {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin-top: 1.75rem;
}

.page-about .dim {
  min-width: 0;
  padding: 1.1rem 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .dim:last-child {
  border-bottom: 1px solid var(--about-rule);
}

.page-about .dim__index {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-neon);
}

.page-about .dim__title {
  margin: 0.4rem 0 0.5rem;
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--c-bone);
}

.page-about .dim__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--c-mist);
}

/* ---------- 覆盖范围 ---------- */

.page-about .coverage-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
  align-items: start;
  margin-top: 1.5rem;
}

.page-about .coverage-ring-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0.75rem;
  border: 1px solid var(--hair-line);
  border-radius: var(--r-lg);
  background: linear-gradient(150deg, var(--c-stand) 0%, var(--c-field) 100%);
}

.page-about .coverage-ring {
  width: clamp(150px, 46vw, 210px);
  height: auto;
}

.page-about .coverage-ring__num {
  font-family: var(--font-mono);
  font-size: 38px;
  font-weight: 700;
  fill: var(--c-neon);
}

.page-about .coverage-ring__unit {
  font-size: 13px;
  letter-spacing: 0.1em;
  fill: var(--c-mist);
}

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

.page-about .coverage-facts__item {
  min-width: 0;
  padding: 0.25rem 0 0.25rem 0.95rem;
  border-left: 2px solid var(--c-moss);
  transition: border-color var(--t-base) var(--ease);
}

.page-about .coverage-facts__item:hover {
  border-left-color: var(--c-neon);
}

.page-about .coverage-facts__title {
  margin: 0 0 0.35rem;
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--c-bone);
}

.page-about .coverage-facts__item p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--c-mist);
}

/* ---------- 团队协作 ---------- */

.page-about .team-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
  margin-top: 1.25rem;
}

.page-about .role-list {
  margin: 0;
  padding: 0;
  list-style: none;
  min-width: 0;
}

.page-about .role {
  display: flex;
  gap: 0.9rem;
  padding: 1rem 0;
  border-top: 1px solid var(--about-rule);
  transition: transform var(--t-base) var(--ease);
}

.page-about .role:last-child {
  border-bottom: 1px solid var(--about-rule);
}

.page-about .role:hover {
  transform: translateY(-2px);
}

.page-about .role__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.9;
  color: var(--c-neon-soft);
}

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

.page-about .role__title {
  margin: 0 0 0.3rem;
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--c-bone);
}

.page-about .role__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--c-mist);
}

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

/* ---------- 本地服务 ---------- */

.page-about .local-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
  margin-top: 1.25rem;
}

.page-about .local-copy {
  min-width: 0;
}

.page-about .local-points {
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
}

.page-about .local-points li {
  position: relative;
  padding: 0.5rem 0 0.5rem 1.4rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--c-mist);
  border-top: 1px dashed var(--about-rule);
}

.page-about .local-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.1rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-ember);
}

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

/* ---------- 时间轴 ---------- */

.page-about .timeline {
  position: relative;
  margin: 1.75rem 0 0;
  padding: 0 0 0 1.75rem;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 0.3rem;
  top: 0.55rem;
  bottom: 0.55rem;
  width: 1px;
  background: linear-gradient(180deg, var(--c-neon) 0%, var(--c-moss) 62%, transparent 100%);
}

.page-about .tl-item {
  position: relative;
  padding-bottom: 1.6rem;
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -1.75rem;
  top: 0.4rem;
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--c-field);
  border: 2px solid var(--c-neon);
  transition: transform var(--t-base) var(--ease), box-shadow var(--t-base) var(--ease);
}

.page-about .tl-item:hover::before {
  transform: scale(1.3);
  box-shadow: 0 0 0 5px rgba(0, 229, 192, 0.14);
}

.page-about .tl-item--now::before {
  border-color: var(--c-ember);
}

.page-about .tl-item--now:hover::before {
  box-shadow: 0 0 0 5px rgba(255, 122, 48, 0.16);
}

.page-about .tl-period {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--c-neon);
}

.page-about .tl-item--now .tl-period {
  color: var(--c-ember);
}

.page-about .tl-title {
  margin: 0.3rem 0 0.35rem;
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--c-bone);
}

.page-about .tl-note {
  margin: 0;
  max-width: 40rem;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--c-mist);
  transition: color var(--t-base) var(--ease);
}

.page-about .tl-item:hover .tl-note {
  color: var(--about-ink);
}

.page-about .timeline-more {
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--about-rule);
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-about .timeline-more a {
  color: var(--c-neon);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-base) var(--ease);
}

.page-about .timeline-more a:hover,
.page-about .timeline-more a:focus-visible {
  border-bottom-color: var(--c-neon);
}

/* ---------- 响应式 ---------- */

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

  .page-about .index-list li {
    flex-wrap: nowrap;
  }

  .page-about .dims {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 1.5rem;
  }

  .page-about .dim {
    border-bottom: 1px solid var(--about-rule);
  }
}

@media (min-width: 780px) {
  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: clamp(1.75rem, 4vw, 3rem);
    align-items: start;
  }

  .page-about .local-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: clamp(1.75rem, 4vw, 3rem);
    align-items: center;
  }

  .page-about .coverage-grid {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: clamp(1.75rem, 4vw, 3rem);
    align-items: center;
  }

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

@media (min-width: 940px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 7.2fr) minmax(0, 4.2fr);
    gap: clamp(2rem, 6vw, 5rem);
    align-items: end;
  }

  .page-about .about-media--wide {
    margin-top: 2.25rem;
  }
}

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-about .about-toc {
    position: sticky;
    top: 6.5rem;
    align-self: start;
    padding-bottom: 0;
    border-bottom: 0;
  }

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

  .page-about .about-toc__list li + li {
    margin-top: 0.3rem;
  }

  .page-about .about-toc__list a {
    border-radius: var(--r-sm);
    white-space: normal;
    padding: 0.45rem 0.7rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .hero-tile:hover,
  .page-about .scene-card:hover,
  .page-about .role:hover,
  .page-about .tl-item:hover::before {
    transform: none;
  }
}