.page-about {
  --about-space: clamp(3.5rem, 9vw, 7.5rem);
  --about-hair: rgba(143, 163, 154, 0.28);
  --about-glow-soft: rgba(61, 242, 200, 0.14);
  display: block;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about .shell {
  width: 100%;
}

.page-about .breadcrumbs {
  padding-top: clamp(1rem, 3vw, 1.75rem);
}

.page-about .about-block {
  padding-block: var(--about-space);
}

.page-about .about-link {
  color: var(--glow);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 242, 200, 0.4);
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  border-bottom-color: var(--gold);
  color: var(--gold);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding-block: clamp(1.5rem, 4vw, 2.5rem) var(--about-space);
  background:
    radial-gradient(130% 90% at 8% -10%, rgba(31, 90, 67, 0.75) 0%, rgba(11, 31, 23, 0) 58%),
    var(--ink);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  margin-top: clamp(1.25rem, 3vw, 2rem);
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.4rem, 9vw, 5.6rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
  text-transform: none;
  word-break: break-word;
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--glow);
}

.page-about .about-hero__lede {
  max-width: 60ch;
  margin: clamp(1.25rem, 3vw, 1.75rem) 0 0;
  padding-left: clamp(0.9rem, 2vw, 1.4rem);
  border-left: 4px solid var(--glow);
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  line-height: 1.8;
  color: rgba(244, 247, 245, 0.88);
}

.page-about .about-hero__media {
  margin: 0;
  border: 2px solid var(--reflex);
  box-shadow: var(--shadow-hard);
}

.page-about .about-hero__marks {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: clamp(2rem, 5vw, 3rem) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-mark {
  padding: 1rem 1.1rem;
  background: var(--ink-2);
  border: 1px solid var(--about-hair);
  border-top: 3px solid var(--glow);
}

.page-about .about-mark__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 5vw, 2.9rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-about .about-mark__num small {
  font-size: 0.45em;
  margin-left: 0.15em;
}

.page-about .about-mark__txt {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 通用区块头 ---------- */

.page-about .about-head {
  max-width: 68ch;
  margin-bottom: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-head__title {
  margin: 0.5rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.7rem, 4.4vw, 3rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
}

.page-about .about-head__note {
  margin: 0.9rem 0 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 时间轴 ---------- */

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

.page-about .chron::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--glow) 0%, rgba(61, 242, 200, 0.35) 55%, rgba(61, 242, 200, 0) 100%);
}

.page-about .chron__item {
  position: relative;
  padding-left: 2.1rem;
}

.page-about .chron__item + .chron__item {
  margin-top: 1.25rem;
}

.page-about .chron__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.15rem;
  width: 16px;
  height: 16px;
  background: var(--ink);
  border: 2px solid var(--glow);
  transform: rotate(45deg);
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .chron__item:hover::before {
  background: var(--glow);
  border-color: var(--gold);
}

.page-about .chron__index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-about .chron__body {
  margin-top: 0.5rem;
  padding: clamp(1rem, 2.6vw, 1.6rem);
  background: var(--ink-2);
  border: 1px solid var(--about-hair);
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .chron__item:hover .chron__body {
  border-color: rgba(61, 242, 200, 0.55);
  box-shadow: var(--shadow-hard-sm);
  transform: translate(-2px, -2px);
}

.page-about .chron__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.1rem, 2.4vw, 1.5rem);
  line-height: 1.25;
}

.page-about .chron__text {
  margin: 0.75rem 0 0;
  font-size: 0.98rem;
  line-height: 1.8;
  color: rgba(244, 247, 245, 0.82);
}

/* ---------- 团队 ---------- */

.page-about .team-grid {
  display: grid;
  gap: 1.25rem;
}

.page-about .team-card {
  padding: clamp(1.25rem, 3vw, 1.9rem);
  background: var(--ink-3);
  border: 2px solid var(--reflex);
}

.page-about .team-card--alt {
  background: var(--ink-2);
  border-color: rgba(240, 180, 41, 0.4);
}

.page-about .team-card__role {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--glow);
}

.page-about .team-card--alt .team-card__role {
  color: var(--gold);
}

.page-about .team-card__title {
  margin: 0.7rem 0 1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.05rem, 2.3vw, 1.35rem);
  line-height: 1.35;
}

.page-about .team-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .team-list li {
  position: relative;
  padding-left: 1.2rem;
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(244, 247, 245, 0.82);
}

.page-about .team-list li + li {
  margin-top: 0.55rem;
}

.page-about .team-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 0.5rem;
  height: 2px;
  background: var(--glow);
}

.page-about .team-card--alt .team-list li::before {
  background: var(--gold);
}

.page-about .about-team__media {
  margin: clamp(1.5rem, 4vw, 2.5rem) 0 0;
  border: 2px solid var(--reflex);
}

.page-about .steps {
  display: grid;
  gap: 0.75rem;
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.page-about .steps__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.9rem;
  align-items: start;
  padding: 0.85rem 1rem;
  background: rgba(18, 54, 42, 0.55);
  border-left: 3px solid var(--slate);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .steps__item:hover {
  border-left-color: var(--glow);
  background: rgba(18, 54, 42, 0.9);
}

.page-about .steps__no {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--glow);
  padding-top: 0.15rem;
}

.page-about .steps__txt {
  font-size: 0.95rem;
  line-height: 1.7;
  color: rgba(244, 247, 245, 0.86);
}

/* ---------- 本地球迷组织 ---------- */

.page-about .about-org {
  background:
    linear-gradient(180deg, rgba(31, 90, 67, 0.28) 0%, rgba(11, 31, 23, 0) 42%),
    var(--ink);
}

.page-about .org-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.page-about .org-map {
  margin: 0;
  padding: clamp(1rem, 3vw, 1.6rem);
  background: var(--ink-2);
  border: 2px solid var(--reflex);
}

.page-about .org-map__svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 460px;
  margin: 0 auto;
}

.page-about .map__shape {
  fill: rgba(31, 90, 67, 0.35);
  stroke: rgba(61, 242, 200, 0.45);
  stroke-width: 2;
  stroke-linejoin: round;
}

.page-about .map__dot {
  fill: var(--slate);
  transition: fill 0.25s var(--ease), r 0.25s var(--ease);
}

.page-about .map__pin:hover .map__dot,
.page-about .map__pin:focus-within .map__dot {
  fill: var(--glow);
}

.page-about .map__label {
  fill: var(--paper);
  font-family: var(--font-mono);
  font-size: 14px;
  opacity: 0;
  transition: opacity 0.2s var(--ease);
}

.page-about .map__label--main {
  fill: var(--gold);
}

.page-about .map__pin:hover .map__label,
.page-about .map__pin:focus-within .map__label {
  opacity: 1;
}

.page-about .org-map__caption {
  margin: 0.9rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .org-info__title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.2rem, 2.8vw, 1.7rem);
  line-height: 1.25;
}

.page-about .org-info p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(244, 247, 245, 0.84);
}

.page-about .org-info p + p {
  margin-top: 1rem;
}

.page-about .org-facts {
  margin: 1.5rem 0 0;
  padding: 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .org-facts__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.2rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .org-facts__row dt {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-about .org-facts__row dd {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.7;
  color: var(--paper);
}

.page-about .org-info__linkline {
  margin-top: 1.25rem;
  font-size: 0.95rem;
  color: var(--slate);
}

.page-about .about-org__media {
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
  border: 2px solid var(--reflex);
  box-shadow: var(--shadow-hard);
}

/* ---------- 档案 ---------- */

.page-about .archive-grid {
  display: grid;
  gap: 1rem;
}

.page-about .archive-card {
  padding: clamp(1.15rem, 3vw, 1.75rem);
  background: var(--ink-2);
  border: 1px solid var(--about-hair);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .archive-card:hover {
  border-color: rgba(61, 242, 200, 0.5);
  transform: translateY(-3px);
}

.page-about .archive-card__no {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 2rem;
  line-height: 1;
  color: var(--gold);
}

.page-about .archive-card__title {
  margin: 0.75rem 0 0.6rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  line-height: 1.3;
}

.page-about .archive-card p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(244, 247, 245, 0.82);
}

.page-about .archive-foot {
  margin: clamp(1.5rem, 3vw, 2rem) 0 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--about-hair);
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 合作生态 ---------- */

.page-about .eco {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  padding: clamp(1.4rem, 4vw, 2.6rem);
  background: var(--ink-3);
  border: 2px solid var(--reflex);
  box-shadow: var(--shadow-hard);
}

.page-about .eco__main p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(244, 247, 245, 0.84);
}

.page-about .eco__main p + p {
  margin-top: 1rem;
}

.page-about .eco__main .about-head__title {
  margin: 0.5rem 0 1.1rem;
}

.page-about .eco__side {
  padding: clamp(1rem, 3vw, 1.5rem);
  background: rgba(11, 31, 23, 0.75);
  border-left: 4px solid var(--gold);
}

.page-about .eco__side-title {
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .eco__list {
  margin: 0;
  padding-left: 1.2rem;
  font-size: 0.94rem;
  line-height: 1.8;
  color: rgba(244, 247, 245, 0.85);
}

.page-about .eco__list li + li {
  margin-top: 0.45rem;
}

.page-about .eco__btn {
  margin-top: 1.25rem;
}

/* ---------- 结尾 CTA ---------- */

.page-about .about-cta {
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
  background:
    linear-gradient(115deg, rgba(61, 242, 200, 0.12) 0%, rgba(11, 31, 23, 0) 55%),
    var(--black);
  border-top: 2px solid var(--reflex);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 1.5rem;
}

.page-about .about-cta__copy h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 4.2vw, 2.6rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.page-about .about-cta__copy p {
  margin: 0.9rem 0 0;
  max-width: 58ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-hero__marks {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .page-about .org-facts__row {
    grid-template-columns: 12rem 1fr;
    gap: 1rem;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: end;
  }

  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
  }

  .page-about .org-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-about .eco {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 2.5rem;
  }

  .page-about .chron__item {
    padding-left: 2.6rem;
  }

  .page-about .chron__body {
    max-width: 78ch;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero__title {
    letter-spacing: -0.03em;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .chron__body,
  .page-about .archive-card,
  .page-about .steps__item,
  .page-about .map__dot,
  .page-about .map__label {
    transition: none;
  }
}