.page-about {
  --about-line: rgba(147, 162, 155, 0.22);
  --about-line-gold: rgba(201, 162, 39, 0.42);
  --about-rule: rgba(26, 29, 28, 0.15);
  --about-muted: #4E5A55;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-top: clamp(22px, 4vw, 48px);
  padding-bottom: clamp(44px, 7vw, 96px);
}

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

.page-about .about-hero__note {
  display: none;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 56px);
  margin-top: clamp(24px, 4vw, 48px);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(31px, 6.4vw, 66px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--paper);
  margin: 16px 0 0;
  max-width: 13em;
}

.page-about .about-hero__sub {
  margin: 20px 0 0;
  font-size: clamp(16px, 1.9vw, 19px);
  line-height: 1.75;
  color: var(--gold-300);
  max-width: 28em;
}

.page-about .about-hero__text {
  margin: 16px 0 0;
  color: rgba(244, 239, 228, 0.76);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3.2vw, 36px);
}

.page-about .about-facts {
  margin: 0;
  border-top: 1px solid var(--about-line-gold);
}

.page-about .about-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-facts__key {
  margin: 0;
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .about-facts__value {
  margin: 0;
  font-size: clamp(19px, 2.4vw, 25px);
  letter-spacing: 0.05em;
  color: var(--gold-300);
}

.page-about .about-facts__note {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 34em;
}

/* ---------- 发展时间轴 ---------- */

.page-about .about-timeline__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(34px, 5vw, 60px);
  margin-top: clamp(30px, 4.5vw, 54px);
}

.page-about .about-timeline__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 40px;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold-500) 0%, rgba(201, 162, 39, 0.14) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(26px, 3.4vw, 40px);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -35px;
  top: 7px;
  width: 9px;
  height: 9px;
  background: var(--gold-500);
}

.page-about .about-timeline__year {
  margin: 0;
  font-size: 12.5px;
  letter-spacing: 0.2em;
  color: var(--gold-500);
}

.page-about .about-timeline__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.4vw, 25px);
  line-height: 1.35;
  color: var(--paper);
  margin: 8px 0 8px;
}

.page-about .about-timeline__text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(147, 162, 155, 0.96);
  max-width: 40em;
}

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

.page-about .about-timeline__aside-text {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
  padding-left: 14px;
  border-left: 1px solid var(--about-line-gold);
}

/* ---------- 六大区域 ---------- */

.page-about .about-regions__banner {
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .about-regions__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .about-regions__map {
  border: 1px solid var(--about-rule);
  background: var(--ink-900);
  padding: clamp(12px, 2vw, 20px);
}

.page-about .about-regions__map svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-map__blocks rect {
  fill: var(--ink-700);
  stroke: rgba(201, 162, 39, 0.42);
  stroke-width: 1;
  transition: fill var(--dur) var(--ease), stroke var(--dur) var(--ease);
}

.page-about .about-map__blocks rect:hover {
  fill: rgba(201, 162, 39, 0.22);
  stroke: var(--gold-500);
}

.page-about .about-map__labels text {
  fill: var(--gold-300);
  font-family: var(--font-body);
  font-size: 17px;
  letter-spacing: 0.16em;
  text-anchor: middle;
  dominant-baseline: middle;
  pointer-events: none;
}

.page-about .about-regions__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-regions__row {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  grid-template-areas: "name stat" "meter meter";
  align-items: center;
  gap: 6px 14px;
  padding: 13px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-regions__name {
  grid-area: name;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--graphite);
}

.page-about .about-regions__meter {
  grid-area: meter;
  display: block;
  height: 2px;
  background: rgba(26, 29, 28, 0.13);
}

.page-about .about-regions__meter i {
  display: block;
  height: 100%;
  background: var(--gold-500);
}

.page-about .about-region--east .about-regions__meter i { width: 82%; }
.page-about .about-region--south .about-regions__meter i { width: 67%; }
.page-about .about-region--north .about-regions__meter i { width: 63%; }
.page-about .about-region--central .about-regions__meter i { width: 64%; }
.page-about .about-region--southwest .about-regions__meter i { width: 50%; }
.page-about .about-region--northwest .about-regions__meter i { width: 42%; }

.page-about .about-regions__stat {
  grid-area: stat;
  text-align: right;
  font-size: 13px;
  color: var(--about-muted);
}

.page-about .about-regions__foot {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--about-muted);
  max-width: 40em;
}

/* ---------- 场景矩阵 ---------- */

.page-about .about-scenes__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(24px, 3.4vw, 38px);
}

.page-about .about-scenes__filter {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 9px 18px;
  border: 1px solid var(--about-line-gold);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--gold-300);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-scenes__filter input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  margin: 0;
}

.page-about .about-scenes__filter:has(input:checked) {
  background: var(--gold-500);
  border-color: var(--gold-500);
  color: var(--ink-900);
}

.page-about .about-scenes__filter:has(input:focus-visible) {
  outline: 1px solid var(--gold-300);
  outline-offset: 2px;
}

.page-about .about-scenes__scroll {
  margin-top: clamp(22px, 3vw, 32px);
  overflow-x: auto;
  border: 1px solid var(--about-line-gold);
}

.page-about .about-scenes__table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
}

.page-about .about-scenes__table th,
.page-about .about-scenes__table td {
  text-align: left;
  vertical-align: top;
  padding: 16px 18px;
  border-bottom: 1px solid var(--about-line);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-scenes__table thead th {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold-500);
  font-weight: 500;
  border-bottom-color: var(--about-line-gold);
  white-space: nowrap;
}

.page-about .about-scenes__table tbody th[scope="row"] {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--paper);
  white-space: nowrap;
}

.page-about .about-scenes__table tbody td {
  color: rgba(244, 239, 228, 0.78);
}

.page-about .about-scenes__table tbody tr {
  transition: opacity var(--dur) var(--ease);
}

.page-about .about-scenes:has(#scene-tier-base:checked) .about-scenes__table tbody tr:not([data-tier~="base"]),
.page-about .about-scenes:has(#scene-tier-preferred:checked) .about-scenes__table tbody tr:not([data-tier~="preferred"]),
.page-about .about-scenes:has(#scene-tier-partner:checked) .about-scenes__table tbody tr:not([data-tier~="partner"]) {
  opacity: 0.2;
}

.page-about .about-scenes__note {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 42em;
}

.page-about .about-scenes__note a {
  color: var(--gold-300);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ---------- 驻地服务与培训 ---------- */

.page-about .about-support__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
  margin-top: clamp(30px, 4.5vw, 52px);
}

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

.page-about .about-support__col .prose {
  margin-top: 0;
  color: var(--graphite);
}

.page-about .about-support__list {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-support__item {
  padding: 18px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-support__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 20px);
  color: var(--graphite);
  margin: 0 0 6px;
}

.page-about .about-support__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-muted);
  max-width: 38em;
}

/* ---------- 资质与合作生态 ---------- */

.page-about .about-credentials__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(28px, 4vw, 48px);
  background: rgba(201, 162, 39, 0.32);
  border: 1px solid rgba(201, 162, 39, 0.32);
}

.page-about .about-credential {
  background: var(--ink-900);
  padding: clamp(22px, 3vw, 34px);
}

.page-about .about-credential__num {
  margin: 0;
  font-size: clamp(28px, 4.2vw, 42px);
  line-height: 1.1;
  letter-spacing: 0.04em;
  color: var(--gold-500);
}

.page-about .about-credential__label {
  margin: 12px 0 0;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--gold-300);
}

.page-about .about-credential__text {
  margin: 14px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-credentials__foot {
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--mist);
  max-width: 46em;
}

.page-about .about-credentials__foot a {
  color: var(--gold-300);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ---------- 结尾引导 ---------- */

.page-about .about-cta__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .about-cta__text .prose {
  margin-top: 18px;
  color: rgba(244, 239, 228, 0.78);
}

.page-about .about-cta__text a {
  color: var(--gold-300);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-about .about-regions__row {
    grid-template-columns: 66px minmax(0, 1fr) auto;
    grid-template-areas: "name meter stat";
    gap: 18px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    column-gap: clamp(36px, 5vw, 72px);
    align-items: end;
  }

  .page-about .about-hero__aside {
    padding-bottom: 6px;
  }

  .page-about .about-support__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    column-gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }

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

  .page-about .about-cta__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    column-gap: clamp(32px, 5vw, 64px);
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-about .about-timeline__body {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    column-gap: clamp(40px, 6vw, 96px);
    align-items: start;
  }

  .page-about .about-timeline__aside {
    position: sticky;
    top: 96px;
  }

  .page-about .about-regions__body {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    column-gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }
}

@media (min-width: 1280px) {
  .page-about .about-hero__note {
    display: block;
    position: absolute;
    right: 0;
    top: 32px;
    writing-mode: vertical-rl;
    letter-spacing: 0.34em;
    font-size: 11.5px;
    color: var(--mist);
    white-space: nowrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-map__blocks rect,
  .page-about .about-scenes__table tbody tr,
  .page-about .about-scenes__filter {
    transition: none;
  }
}