.page-about {
  --ab-panel: var(--ink-900);
  --ab-line: var(--line-gold);
  display: block;
  background: var(--ink-800);
  color: var(--cream);
  overflow-x: hidden;
}

.page-about section[id],
.page-about header[id] {
  scroll-margin-top: 96px;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  padding: 22px 0 30px;
  background:
    radial-gradient(120% 90% at 86% -18%, rgba(232, 200, 122, 0.18), transparent 62%),
    linear-gradient(180deg, var(--ink-900) 0%, var(--ink-800) 100%);
  border-bottom: 1px solid var(--line-gold-soft);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: 24px;
  margin-top: 22px;
}

.page-about .ab-hero__lead > * {
  min-width: 0;
}

.page-about .ab-hero h1 {
  margin: 10px 0 16px;
  font-family: var(--font-display);
  font-size: clamp(30px, 6.6vw, 52px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: 0.04em;
  color: var(--cream);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .ab-hero__aside {
  padding: 20px 18px;
  border: 1px solid var(--line-gold);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(201, 169, 110, 0.12), rgba(13, 21, 38, 0.4));
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.28);
}

.page-about .ab-hero__aside-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold-1);
}

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

.page-about .ab-hero__facts li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-gold-soft);
}

.page-about .ab-hero__facts li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .ab-hero__facts span {
  font-size: 13px;
  color: var(--mist);
}

.page-about .ab-hero__facts strong {
  font-family: var(--font-mono);
  font-size: 17px;
  letter-spacing: 0.04em;
  color: var(--gold-2);
}

.page-about .chapter-index {
  margin-top: 28px;
}

/* ---------- 发展历程 ---------- */
.page-about .ab-history__figure {
  margin: 8px 0 30px;
}

.page-about .ab-history__figure img,
.page-about .ab-org__figure img,
.page-about .ab-after__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .ab-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 4px 0 0 30px;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  bottom: 18px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold-1), rgba(201, 169, 110, 0.08));
}

.page-about .ab-timeline__item {
  position: relative;
  padding: 0 0 30px;
}

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

.page-about .ab-timeline__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gold-2);
  box-shadow: 0 0 0 4px rgba(201, 169, 110, 0.14);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.page-about .ab-timeline__item:hover::before {
  transform: scale(1.25);
  box-shadow: 0 0 0 6px rgba(201, 169, 110, 0.2);
}

.page-about .ab-timeline__tag {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--gold-1);
}

.page-about .ab-timeline__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(20px, 3.4vw, 26px);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--gold-3);
}

.page-about .ab-timeline__text {
  margin: 0;
  max-width: 62ch;
  color: rgba(245, 239, 226, 0.82);
  line-height: 1.8;
}

/* ---------- 组织分工 ---------- */
.page-about .ab-org__panels {
  display: grid;
  border: 1px solid var(--line-gold);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .ab-org__ink {
  background: var(--ab-panel);
  padding: 26px 20px;
  border-bottom: 1px solid var(--line-gold);
}

.page-about .ab-org__paper {
  background: var(--cream);
  color: var(--paper-ink);
  padding: 26px 20px;
}

.page-about .ab-org__label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold-1);
}

.page-about .ab-org__label--paper {
  color: #8a6d2f;
}

.page-about .ab-org__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(22px, 4vw, 30px);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--cream);
}

.page-about .ab-org__text {
  margin: 0 0 16px;
  line-height: 1.8;
  color: rgba(245, 239, 226, 0.82);
}

.page-about .ab-org__paper .ab-org__text {
  color: rgba(32, 26, 20, 0.82);
}

.page-about .ab-org__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-org__list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(245, 239, 226, 0.9);
}

.page-about .ab-org__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 1px;
  background: var(--gold-2);
}

.page-about .ab-regions {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-region {
  padding: 12px 14px;
  border: 1px solid var(--line-paper);
  border-left: 3px solid var(--gold-1);
  background: rgba(255, 255, 255, 0.5);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.page-about .ab-region:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(32, 26, 20, 0.12);
}

.page-about .ab-region__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin: 0 0 6px;
}

.page-about .ab-region__name {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--paper-ink);
}

.page-about .ab-region__count {
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--cinnabar);
}

.page-about .ab-region__focus {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(32, 26, 20, 0.72);
}

.page-about .ab-org__figure {
  margin: 26px 0 0;
}

/* ---------- 申请路径 ---------- */
.page-about .ab-process {
  background: var(--ink-900);
}

.page-about .ab-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-gold);
  border: 1px solid var(--line-gold);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .ab-step {
  background: var(--ink-800);
  padding: 22px 18px;
}

.page-about .ab-step__num {
  margin: 0 0 10px;
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--cinnabar);
}

.page-about .ab-step__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--gold-3);
}

.page-about .ab-step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(245, 239, 226, 0.8);
}

.page-about .ab-materials {
  margin-top: 26px;
  padding: 22px 20px;
  border: 1px dashed var(--line-gold);
  border-radius: var(--radius);
  background: rgba(201, 169, 110, 0.05);
}

.page-about .ab-materials__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 19px;
  letter-spacing: 0.04em;
  color: var(--gold-2);
}

.page-about .ab-materials__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .ab-materials__list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(245, 239, 226, 0.85);
}

.page-about .ab-materials__list li::before {
  content: "·";
  position: absolute;
  left: 4px;
  top: -1px;
  color: var(--gold-1);
}

.page-about .ab-materials__note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-gold-soft);
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 2024 版条款 ---------- */
.page-about .ab-seal {
  position: relative;
  padding: 26px 20px 18px;
  border: 1px solid var(--gold-1);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(201, 169, 110, 0.1), rgba(201, 169, 110, 0.02));
}

.page-about .ab-seal::after {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px solid var(--line-gold-soft);
  border-radius: 1px;
  pointer-events: none;
}

.page-about .ab-seal__stamp {
  display: inline-block;
  margin-bottom: 16px;
  padding: 5px 10px;
  border: 2px solid var(--cinnabar);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cinnabar);
  transform: rotate(-2deg);
}

.page-about .ab-term {
  position: relative;
  padding: 14px 0;
  border-top: 1px solid var(--line-gold-soft);
}

.page-about .ab-term:first-child {
  border-top: 0;
  padding-top: 4px;
}

.page-about .ab-term summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gold-3);
}

.page-about .ab-term summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-term summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--gold-1);
}

.page-about .ab-term[open] summary::after {
  content: "−";
}

.page-about .ab-term summary:focus-visible {
  outline: 2px solid var(--gold-2);
  outline-offset: 4px;
}

.page-about .ab-term p {
  margin: 10px 0 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(245, 239, 226, 0.82);
}

/* ---------- 服务规模 ---------- */
.page-about .ab-scale__grid {
  display: grid;
  gap: 22px;
}

.page-about .ab-scale__cell {
  padding-left: 16px;
  border-left: 1px solid var(--line-gold);
}

.page-about .ab-scale__value {
  margin: 0;
  font-size: clamp(34px, 8vw, 54px);
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--gold-2);
  background: linear-gradient(135deg, var(--gold-1), var(--gold-2) 55%, var(--gold-3));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-about .ab-scale__unit {
  font-size: 0.55em;
  letter-spacing: 0;
}

.page-about .ab-scale__label {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .ab-industries {
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px solid var(--line-gold-soft);
}

.page-about .ab-industries__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--gold-1);
}

.page-about .ab-industries__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .ab-industries__note {
  margin: 16px 0 0;
  max-width: 66ch;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(245, 239, 226, 0.75);
}

/* ---------- 长期合作 ---------- */
.page-about .ab-after__inner {
  display: grid;
  gap: 26px;
  align-items: start;
}

.page-about .ab-after__text {
  min-width: 0;
}

.page-about .ab-after__p {
  margin: 0 0 16px;
  max-width: 64ch;
  line-height: 1.85;
  color: rgba(32, 26, 20, 0.84);
}

.page-about .ab-after__list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-after__list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(32, 26, 20, 0.86);
}

.page-about .ab-after__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 10px;
  height: 1px;
  background: var(--cinnabar);
}

.page-about .ab-after__figure {
  margin: 0;
}

/* ---------- 下一步 ---------- */
.page-about .ab-next {
  background: linear-gradient(180deg, var(--ink-900), var(--ink-800));
  border-top: 1px solid var(--line-gold-soft);
}

.page-about .ab-next__inner {
  display: grid;
  gap: 26px;
  align-items: center;
}

.page-about .ab-next__lead {
  min-width: 0;
}

.page-about .ab-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-about .ab-regions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .ab-scale__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 24px;
  }
}

@media (min-width: 760px) {
  .page-about .ab-hero {
    padding: 28px 0 40px;
  }

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

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

@media (min-width: 960px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1fr) 268px;
    gap: 34px;
    align-items: start;
  }

  .page-about .ab-org__panels {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
  }

  .page-about .ab-org__ink {
    padding: 34px 28px;
    border-bottom: 0;
    border-right: 1px solid var(--line-gold);
  }

  .page-about .ab-org__paper {
    padding: 34px 28px;
  }

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

  .page-about .ab-seal {
    padding: 34px 32px 24px;
  }

  .page-about .ab-after__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 40px;
  }

  .page-about .ab-next__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 34px;
  }

  .page-about .ab-next__actions {
    justify-content: flex-end;
    max-width: 380px;
  }
}

@media (min-width: 1160px) {
  .page-about .ab-scale__grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .ab-industries {
    margin-top: 42px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-region,
  .page-about .ab-timeline__item::before,
  .page-about [data-reveal] {
    transition: none !important;
  }

  .page-about .ab-region:hover {
    transform: none;
  }
}