/* ===== 关于神殿 · page-about ===== */

.page-about {
  --ab-pad: clamp(20px, 5vw, 56px);
  position: relative;
  overflow-x: clip;
  color: var(--sd-ink);
}

/* ---------- 拱门开篇 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: calc(var(--sd-header-h) + 48px) var(--ab-pad) clamp(56px, 9vw, 96px);
  overflow: hidden;
  isolation: isolate;
}

.page-about .ab-hero__arch {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.page-about .ab-hero__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 26%;
  opacity: 0.38;
}

.page-about .ab-hero__veil {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(142% 82% at 50% 118%, var(--sd-obsidian) 34%, rgba(11, 11, 16, 0) 74%),
    radial-gradient(54% 40% at 50% 4%, rgba(200, 162, 74, 0.2), rgba(11, 11, 16, 0) 72%),
    linear-gradient(180deg, rgba(11, 11, 16, 0.66), rgba(11, 11, 16, 0.84));
}

.page-about .ab-hero__inner {
  position: relative;
  text-align: center;
}

.page-about .ab-crumbs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 26px;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--sd-ink-dim);
}

.page-about .ab-crumbs a {
  color: var(--sd-ink-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--sd-ease), border-color 0.18s var(--sd-ease);
}

.page-about .ab-crumbs a:hover,
.page-about .ab-crumbs a:focus-visible {
  color: var(--sd-gold-bright);
  border-bottom-color: var(--sd-gold);
}

.page-about .ab-hero__title {
  margin: 16px auto 0;
  max-width: 17em;
  font-family: var(--sd-font-display);
  font-weight: 900;
  font-size: clamp(2rem, 6.6vw, 4.4rem);
  line-height: 1.14;
  letter-spacing: 0.05em;
  color: var(--sd-bone);
}

.page-about .ab-hero__title em {
  display: block;
  margin-top: 0.14em;
  font-style: normal;
  color: var(--sd-gold-bright);
}

.page-about .ab-hero__lede {
  margin: 24px auto 0;
  max-width: 48em;
  font-size: clamp(1rem, 2.1vw, 1.1rem);
  line-height: 1.9;
  color: var(--sd-ink);
}

.page-about .ab-hero__facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px clamp(22px, 5vw, 52px);
  max-width: 900px;
  margin: 40px auto 0;
  padding: 0;
}

.page-about .ab-hero__facts li {
  min-width: 112px;
  padding-top: 12px;
  border-top: 1px solid var(--sd-line);
  text-align: left;
}

.page-about .ab-num {
  display: block;
  font-family: var(--sd-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.4rem, 3.4vw, 1.9rem);
  line-height: 1.1;
  letter-spacing: 0.03em;
  color: var(--sd-gold-bright);
}

.page-about .ab-hero__facts span:last-child {
  display: block;
  margin-top: 6px;
  font-size: 0.76rem;
  letter-spacing: 0.2em;
  color: var(--sd-ink-dim);
}

/* ---------- 通用标题 ---------- */
.page-about .ab-h2 {
  margin: 14px 0 0;
  font-family: var(--sd-font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.8vw, 2.5rem);
  line-height: 1.32;
  letter-spacing: 0.04em;
  color: var(--sd-bone);
}

.page-about .ab-h3 {
  margin: 0 0 10px;
  font-family: var(--sd-font-display);
  font-weight: 700;
  font-size: clamp(1.05rem, 2.2vw, 1.28rem);
  line-height: 1.4;
  letter-spacing: 0.04em;
  color: var(--sd-bone);
}

/* ---------- 平台定位 ---------- */
.page-about .ab-def {
  border-top: 1px solid var(--sd-line-soft);
}

.page-about .ab-def__grid {
  display: grid;
  gap: clamp(32px, 5vw, 64px);
}

.page-about .ab-def__lead p {
  margin: 18px 0 0;
  max-width: 40em;
  line-height: 1.85;
}

.page-about .ab-pillars {
  display: grid;
  gap: 16px;
}

.page-about .ab-pillar {
  position: relative;
  padding: 28px 24px 30px;
  border: 1px solid var(--sd-line-soft);
  border-radius: var(--sd-radius);
  background: linear-gradient(180deg, var(--sd-rock-lift), var(--sd-rock));
  overflow: hidden;
}

.page-about .ab-pillar::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: var(--ab-accent);
}

.page-about .ab-pillar--gold { --ab-accent: var(--sd-gold); }
.page-about .ab-pillar--violet { --ab-accent: var(--sd-violet); }
.page-about .ab-pillar--lava { --ab-accent: var(--sd-lava); }

.page-about .ab-pillar__no {
  margin: 0 0 12px;
  font-family: var(--sd-font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.3em;
  color: var(--ab-accent);
}

.page-about .ab-pillar p:last-child {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--sd-ink);
}

/* ---------- 发展节点 ---------- */
.page-about .ab-time {
  border-top: 1px solid var(--sd-line-soft);
}

.page-about .ab-time__layout {
  display: grid;
  gap: 26px;
  margin-top: clamp(30px, 5vw, 52px);
}

.page-about .ab-rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 2px 0 14px;
  scrollbar-width: none;
}

.page-about .ab-rail::-webkit-scrollbar { display: none; }

.page-about .ab-rail__link {
  flex: 0 0 auto;
  padding: 7px 15px;
  border: 1px solid var(--sd-line-soft);
  border-radius: 999px;
  font-family: var(--sd-font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  color: var(--sd-ink-dim);
  text-decoration: none;
  transition: color 0.2s var(--sd-ease), border-color 0.2s var(--sd-ease), background 0.2s var(--sd-ease);
}

.page-about .ab-rail__link:hover,
.page-about .ab-rail__link:focus-visible {
  color: var(--sd-bone);
  border-color: var(--sd-line);
}

.page-about .ab-rail__link[aria-current="true"] {
  color: var(--sd-obsidian);
  background: var(--sd-gold);
  border-color: var(--sd-gold);
}

.page-about .ab-nodes {
  list-style: none;
  margin: 0;
  padding: 0 0 0 4px;
  border-left: 1px solid var(--sd-line-soft);
}

.page-about .ab-node {
  position: relative;
  padding: 4px 0 40px 22px;
}

.page-about .ab-node:last-child { padding-bottom: 4px; }

.page-about .ab-node::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: 14px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--sd-gold);
  box-shadow: 0 0 0 5px rgba(200, 162, 74, 0.12);
}

.page-about .ab-node__year {
  margin: 0 0 8px;
  font-family: var(--sd-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.6rem, 5.4vw, 2.4rem);
  line-height: 1;
  color: var(--sd-gold);
}

.page-about .ab-node__text {
  margin: 0;
  max-width: 42em;
  font-size: 0.95rem;
  line-height: 1.82;
  color: var(--sd-ink);
}

.page-about .ab-node--media { padding-left: 22px; }

.page-about .ab-node--media::before { display: none; }

.page-about .ab-figure {
  margin: 0;
  border: 1px solid var(--sd-line);
  border-radius: var(--sd-radius-lg);
  background: var(--sd-rock);
  overflow: hidden;
}

.page-about .ab-figure__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .ab-figure__cap {
  padding: 14px 18px;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--sd-ink-dim);
  border-top: 1px solid var(--sd-line-soft);
}

/* ---------- 横向数据带 ---------- */
.page-about .ab-band {
  padding: clamp(34px, 6vw, 58px) 0;
  border-top: 1px solid var(--sd-line-soft);
  border-bottom: 1px solid var(--sd-line-soft);
  background: linear-gradient(96deg, rgba(123, 77, 255, 0.12), rgba(200, 162, 74, 0.1) 48%, rgba(47, 185, 138, 0.12));
}

.page-about .ab-band__track {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  padding-bottom: 8px;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
}

.page-about .ab-band__item {
  flex: 0 0 min(74vw, 280px);
  scroll-snap-align: start;
  padding: 22px 22px 24px;
  border: 1px solid var(--sd-line-soft);
  border-radius: var(--sd-radius);
  background: rgba(11, 11, 16, 0.62);
}

.page-about .ab-band__k {
  margin: 0;
  font-family: var(--sd-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  line-height: 1.2;
  color: var(--sd-gold-bright);
}

.page-about .ab-band__v {
  margin: 10px 0 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--sd-ink-dim);
}

/* ---------- 内容生产 ---------- */
.page-about .ab-craft__grid {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
}

.page-about .ab-craft__text > p {
  margin: 18px 0 0;
  max-width: 42em;
  line-height: 1.85;
}

.page-about .ab-roles {
  margin: 26px 0 0;
  border-top: 1px solid var(--sd-line-soft);
}

.page-about .ab-roles .sd-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 11px 2px;
  border-bottom: 1px solid var(--sd-line-soft);
  font-size: 0.92rem;
}

.page-about .ab-key {
  color: var(--sd-ink-dim);
  letter-spacing: 0.08em;
}

.page-about .ab-val {
  font-family: var(--sd-font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--sd-bone);
}

.page-about .ab-flow {
  list-style: none;
  display: grid;
  gap: 14px;
  margin: 28px 0 0;
  padding: 0;
}

.page-about .ab-flow li {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  border: 1px solid var(--sd-line-soft);
  border-radius: var(--sd-radius);
  background: var(--sd-rock);
}

.page-about .ab-flow__no {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--sd-gold);
  border-radius: 50%;
  font-family: var(--sd-font-mono);
  font-size: 0.9rem;
  color: var(--sd-gold-bright);
}

.page-about .ab-flow .ab-h3 {
  margin: 4px 0 6px;
}

.page-about .ab-flow p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--sd-ink-dim);
}

.page-about .ab-craft__figure {
  margin: 0;
  align-self: start;
  border: 1px solid var(--sd-line);
  border-radius: var(--sd-radius-lg);
  background: var(--sd-rock);
  overflow: hidden;
}

.page-about .ab-craft__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .ab-craft__figure figcaption {
  padding: 16px 18px;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--sd-ink-dim);
  border-top: 1px solid var(--sd-line-soft);
}

/* ---------- 内蒙古支持 ---------- */
.page-about .ab-local__panel {
  position: relative;
  padding: clamp(28px, 5vw, 52px);
  border: 1px solid rgba(47, 185, 138, 0.26);
  border-radius: var(--sd-radius-lg);
  background: linear-gradient(160deg, rgba(76, 107, 87, 0.34), rgba(11, 11, 16, 0.9) 62%);
  overflow: hidden;
}

.page-about .ab-local__panel::after {
  content: "";
  position: absolute;
  right: -70px;
  top: -70px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 185, 138, 0.2), rgba(11, 11, 16, 0) 70%);
  pointer-events: none;
}

.page-about .ab-local__panel > p {
  margin: 18px 0 0;
  max-width: 44em;
  line-height: 1.85;
  color: var(--sd-bone);
}

.page-about .ab-local__list {
  list-style: none;
  display: grid;
  gap: 12px;
  margin: 26px 0 0;
  padding: 0;
}

.page-about .ab-local__list li {
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  gap: 12px;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--sd-bone);
}

.page-about .ab-local__list li::before {
  content: "";
  width: 8px;
  height: 8px;
  margin-top: 9px;
  border-radius: 2px;
  background: var(--sd-jade);
}

/* ---------- 运营规模 ---------- */
.page-about .ab-scale__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .ab-scale__cell {
  padding: 24px 20px;
  border: 1px solid var(--sd-line-soft);
  border-radius: var(--sd-radius);
  background: var(--sd-rock);
}

.page-about .ab-scale__cell--hero {
  background: linear-gradient(140deg, rgba(200, 162, 74, 0.16), rgba(22, 24, 33, 0.94) 62%);
  border-color: var(--sd-line);
}

.page-about .ab-scale__num {
  margin: 0;
  font-family: var(--sd-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.7rem, 6vw, 3rem);
  line-height: 1;
  color: var(--sd-gold-bright);
}

.page-about .ab-scale__num span {
  margin-left: 0.16em;
  font-size: 0.42em;
  color: var(--sd-gold);
}

.page-about .ab-scale__label {
  margin: 12px 0 0;
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  color: var(--sd-ink-dim);
}

/* ---------- 合作生态 ---------- */
.page-about .ab-eco .sd-lede {
  max-width: 44em;
}

.page-about .ab-eco__cols {
  display: grid;
  gap: 14px;
  margin-top: clamp(28px, 4vw, 42px);
}

.page-about .ab-eco__col {
  padding: 24px 22px 26px;
  border: 1px solid var(--sd-line-soft);
  border-left: 3px solid var(--ab-accent);
  border-radius: var(--sd-radius);
  background: linear-gradient(180deg, var(--sd-rock-lift), var(--sd-rock));
}

.page-about .ab-eco__col--gold { --ab-accent: var(--sd-gold); }
.page-about .ab-eco__col--violet { --ab-accent: var(--sd-violet); }
.page-about .ab-eco__col--jade { --ab-accent: var(--sd-jade); }

.page-about .ab-eco__num {
  margin: 0 0 12px;
  font-family: var(--sd-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.6rem;
  line-height: 1.1;
  color: var(--sd-bone);
}

.page-about .ab-eco__num span {
  margin-left: 0.14em;
  font-size: 0.5em;
  color: var(--sd-ink-dim);
}

.page-about .ab-eco__col > p:last-child {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--sd-ink-dim);
}

.page-about .ab-eco__honor {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 14px;
  margin-top: 22px;
  padding: 20px 22px;
  border: 1px solid rgba(123, 77, 255, 0.3);
  border-radius: var(--sd-radius);
  background: rgba(123, 77, 255, 0.1);
}

.page-about .ab-eco__honor p {
  flex: 1 1 260px;
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--sd-ink);
}

/* ---------- 收束 ---------- */
.page-about .ab-close {
  padding: clamp(56px, 9vw, 104px) var(--ab-pad);
  border-top: 1px solid var(--sd-line-soft);
  background: radial-gradient(80% 90% at 50% 100%, rgba(200, 162, 74, 0.12), rgba(11, 11, 16, 0) 70%);
  text-align: center;
}

.page-about .ab-close__text {
  margin: 20px auto 0;
  max-width: 42em;
  line-height: 1.85;
}

.page-about .ab-close__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 30px;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-about .ab-def__grid {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    align-items: start;
  }

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

  .page-about .ab-time__layout {
    grid-template-columns: 112px minmax(0, 1fr);
    gap: 0 40px;
  }

  .page-about .ab-rail {
    flex-direction: column;
    gap: 2px;
    align-self: start;
    position: sticky;
    top: calc(var(--sd-header-h-sm) + 28px);
    overflow: visible;
    padding: 2px 0;
  }

  .page-about .ab-rail__link {
    padding: 9px 0 9px 16px;
    border: 0;
    border-left: 1px solid var(--sd-line-soft);
    border-radius: 0;
    text-align: left;
  }

  .page-about .ab-rail__link[aria-current="true"] {
    background: none;
    color: var(--sd-gold-bright);
    border-left-color: var(--sd-gold);
  }

  .page-about .ab-node--s1 { padding-left: 22px; }
  .page-about .ab-node--s2 { padding-left: 58px; }
  .page-about .ab-node--media { padding-left: 90px; }
  .page-about .ab-node--s3 { padding-left: 122px; }
  .page-about .ab-node--s4 { padding-left: 154px; }
  .page-about .ab-node--s5 { padding-left: 186px; }

  .page-about .ab-band__track {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
    overflow: visible;
  }

  .page-about .ab-band__item { flex: none; }

  .page-about .ab-craft__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    align-items: start;
  }

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

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

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-rail__link,
  .page-about .ab-crumbs a {
    transition: none;
  }
}