.page-about {
  --about-rule: rgba(201, 162, 39, 0.26);
  --about-soft: rgba(143, 163, 176, 0.18);
  --about-gap: clamp(20px, 3vw, 34px);
}

.page-about [data-reveal] {
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.has-js .page-about [data-reveal] {
  opacity: 0;
  transform: translateY(10px);
}
.has-js .page-about [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- HERO ---------- */
.page-about .about-hero {
  padding-block-start: clamp(26px, 5vw, 52px);
}

.page-about .about-hero .breadcrumb {
  margin-block-end: clamp(18px, 3vw, 30px);
}

.page-about .about-hero-layout {
  display: grid;
  gap: clamp(26px, 5vw, 56px);
  align-items: center;
}

.page-about .about-hero-copy > .lede {
  margin-block: 18px 26px;
  max-width: 62ch;
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 20px;
  margin: 0 0 28px;
  padding: 0;
}

.page-about .about-hero-stats .stat {
  display: flex;
  flex-direction: column-reverse;
  gap: 2px;
  padding-block: 10px 12px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-hero-stats .stat-value {
  font-size: clamp(26px, 3.4vw, 34px);
  line-height: 1.1;
  color: var(--gold);
  letter-spacing: -0.01em;
}

.page-about .about-hero-stats .stat-label {
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--text-dim);
}

.page-about .about-hero-actions {
  gap: 12px;
}

/* Hero 纯 CSS 刻度盘 */
.page-about .about-hero-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: clamp(22px, 4vw, 40px);
  border: 1px solid var(--about-rule);
  border-radius: var(--r-lg);
  background:
    radial-gradient(circle at 80% 12%, rgba(47, 211, 176, 0.09), transparent 58%),
    linear-gradient(165deg, var(--green-800), var(--green-900) 68%);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.page-about .about-hero-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(to right, rgba(244, 241, 232, 0.05) 0 1px, transparent 1px 46px),
    repeating-linear-gradient(to bottom, rgba(244, 241, 232, 0.05) 0 1px, transparent 1px 46px);
  pointer-events: none;
}

.page-about .hero-dial {
  position: relative;
  width: min(300px, 74%);
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    repeating-conic-gradient(from -3deg,
      rgba(201, 162, 39, 0.62) 0 0.7deg,
      transparent 0.7deg 15deg),
    radial-gradient(circle at 50% 50%, var(--green-800) 0 54%, transparent 54%),
    var(--green-900);
  box-shadow:
    inset 0 0 0 1px rgba(201, 162, 39, 0.3),
    inset 0 0 0 16px rgba(12, 42, 36, 0.85),
    0 24px 48px -30px rgba(0, 0, 0, 0.9);
  display: grid;
  place-items: center;
}

.page-about .hero-dial::after {
  content: "";
  position: absolute;
  inset: 26%;
  border-radius: 50%;
  border: 1px dashed rgba(143, 163, 176, 0.35);
}

.page-about .hero-dial-core {
  position: relative;
  z-index: 1;
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 600;
  color: var(--gold-soft);
  letter-spacing: 0.04em;
}

.page-about .hero-visual-note {
  position: relative;
  z-index: 1;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--text-dim);
  text-align: center;
  margin: 0;
}

@media (min-width: 900px) {
  .page-about .about-hero-layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 时间轴 ---------- */
.page-about .about-history {
  padding-block: clamp(48px, 7vw, 86px);
}

.page-about .about-history-figure {
  margin: 0 0 clamp(30px, 5vw, 48px);
  border: 1px solid var(--about-soft);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--green-800);
}

.page-about .about-history-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.72) brightness(0.86) contrast(1.04);
}

.page-about .about-history-figure .media-caption {
  display: block;
  padding: 10px 16px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  border-top: 1px solid var(--about-soft);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  inset-block: 6px;
  inset-inline-start: 9px;
  width: 1px;
  background: linear-gradient(to bottom, rgba(201, 162, 39, 0.5), rgba(143, 163, 176, 0.14));
}

.page-about .about-timeline-item {
  position: relative;
  padding-inline-start: 34px;
}

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  inset-inline-start: 4px;
  inset-block-start: 16px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--green-900);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(201, 162, 39, 0.12);
}

.page-about .about-timeline-item:last-child::before {
  background: var(--mint);
  border-color: var(--mint);
  box-shadow: 0 0 0 4px rgba(47, 211, 176, 0.16);
}

.page-about .about-timeline-fold {
  border: 1px solid var(--about-soft);
  border-radius: var(--r-md);
  background: var(--green-800);
  overflow: hidden;
}

.page-about .about-timeline-fold > summary {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .about-timeline-fold > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-timeline-fold > summary::after {
  content: "＋";
  position: absolute;
  inset-inline-end: 18px;
  inset-block-start: 16px;
  font-size: 14px;
  color: var(--text-dim);
}

.page-about .about-timeline-fold[open] > summary::after {
  content: "－";
  color: var(--gold);
}

.page-about .about-timeline-fold > summary {
  position: relative;
}

.page-about .about-timeline-mark {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}

.page-about .about-timeline-year {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-about .about-timeline-ver {
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  padding: 2px 8px;
  border: 1px solid var(--about-rule);
  border-radius: var(--r-pill);
}

.page-about .about-timeline-head {
  font-family: var(--serif);
  font-size: clamp(17px, 1.7vw, 20px);
  line-height: 1.45;
  color: var(--text);
  padding-inline-end: 30px;
}

.page-about .about-timeline-body {
  padding: 0 18px 18px;
}

.page-about .about-timeline-body p {
  margin: 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-dim);
}

@media (min-width: 820px) {
  .page-about .about-timeline-item {
    display: grid;
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 26px;
    padding-inline-start: 34px;
  }
  .page-about .about-timeline-item::before {
    inset-block-start: 22px;
  }
  .page-about .about-timeline-fold {
    grid-column: 2;
  }
  .page-about .about-timeline-mark {
    display: none;
  }
}

/* ---------- 六类目带 ---------- */
.page-about .about-taxonomy {
  padding-block: clamp(48px, 7vw, 88px);
}

.page-about .about-taxonomy-band {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-tax-item {
  position: relative;
  padding: 22px 20px 24px;
  background: var(--green-900);
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-tax-item:hover,
.page-about .about-tax-item:focus-within {
  background: var(--green-800);
  transform: translateY(-2px);
}

.page-about .about-tax-item::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  inset-block-start: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(to right, var(--gold), transparent 70%);
  opacity: 0.55;
}

.page-about .about-tax-item:hover::before {
  opacity: 1;
}

.page-about .about-tax-code {
  display: block;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--gold-soft);
  margin-block-end: 12px;
}

.page-about .about-tax-title {
  margin: 0 0 8px;
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
}

.page-about .about-tax-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-dim);
}

.page-about .about-taxonomy-note {
  margin: clamp(24px, 3.5vw, 36px) 0 0;
  max-width: 72ch;
  padding: 16px 20px;
  border-inline-start: 2px solid var(--gold);
  background: rgba(201, 162, 39, 0.06);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-block: clamp(48px, 7vw, 88px);
}

.page-about .about-team-grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 22px);
}

.page-about .about-role {
  display: grid;
  gap: 10px;
  padding: 24px 22px 26px;
  border: 1px solid var(--about-soft);
  border-radius: var(--r-md);
  background: linear-gradient(170deg, var(--green-800), var(--green-900));
}

.page-about .about-role-num {
  font-size: clamp(38px, 5vw, 52px);
  font-weight: 600;
  line-height: 1;
  color: var(--gold);
  letter-spacing: -0.02em;
}

.page-about .about-role-title {
  margin: 0;
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 600;
  color: var(--text);
}

.page-about .about-role-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-about .about-flow {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 20px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 0;
  border-top: 1px solid var(--about-soft);
}

.page-about .about-flow-step {
  position: relative;
  flex: 1 1 130px;
  display: grid;
  gap: 4px;
  padding-inline-end: 18px;
}

.page-about .about-flow-step::after {
  content: "";
  position: absolute;
  inset-inline-end: 8px;
  inset-block-start: 9px;
  width: 10px;
  height: 1px;
  background: var(--about-rule);
}

.page-about .about-flow-step--last::after {
  display: none;
}

.page-about .about-flow-idx {
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--gold-soft);
}

.page-about .about-flow-name {
  font-size: 14px;
  color: var(--text);
}

@media (min-width: 860px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 版本与快照 ---------- */
.page-about .about-version {
  padding-block: clamp(48px, 7vw, 88px);
}

.page-about .about-version-layout {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-about .about-version-lede {
  margin: 16px 0 24px;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-version-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 0 0 24px;
  padding: 18px 0 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-version-facts .stat {
  display: flex;
  flex-direction: column-reverse;
  gap: 4px;
}

.page-about .about-version-facts .stat-value {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 600;
  line-height: 1.1;
  color: var(--gold-soft);
}

.page-about .about-version-facts .stat-label {
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--text-dim);
}

.page-about .about-version-text {
  margin: 0 0 26px;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-version-figure {
  margin: 0;
  border: 1px solid var(--about-soft);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--green-900);
}

.page-about .about-version-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.7) brightness(0.88);
}

.page-about .about-version-figure .media-caption {
  display: block;
  padding: 10px 16px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  border-top: 1px solid var(--about-soft);
}

@media (min-width: 900px) {
  .page-about .about-version-layout {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }
}

/* ---------- 厂商 ---------- */
.page-about .about-vendors {
  padding-block: clamp(48px, 7vw, 88px);
}

.page-about .about-vendor-grid {
  display: grid;
  gap: clamp(14px, 2vw, 20px);
  align-items: stretch;
}

.page-about .about-vendor-card {
  display: grid;
  gap: 8px;
  padding: 22px 20px 24px;
  border: 1px solid var(--about-soft);
  border-radius: var(--r-md);
  background: var(--green-800);
}

.page-about .about-vendor-card--primary {
  background: linear-gradient(165deg, rgba(201, 162, 39, 0.16), var(--green-800) 62%);
  border-color: var(--about-rule);
}

.page-about .about-vendor-kicker {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--text-dim);
}

.page-about .about-vendor-value {
  margin: 0;
  font-size: clamp(32px, 4.4vw, 46px);
  font-weight: 600;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-vendor-card:not(.about-vendor-card--primary) .about-vendor-value {
  color: var(--gold-soft);
}

.page-about .about-vendor-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-vendor-note {
  margin: clamp(22px, 3.5vw, 34px) 0 0;
  max-width: 72ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-dim);
}

@media (min-width: 820px) {
  .page-about .about-vendor-grid {
    grid-template-columns: 1.25fr 1fr 1fr;
  }
}

/* ---------- 服务覆盖 ---------- */
.page-about .about-coverage {
  padding-block: clamp(48px, 7vw, 88px);
}

.page-about .about-coverage-layout {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  align-items: center;
}

.page-about .about-coverage-figure {
  margin: 0;
  border: 1px solid var(--about-rule);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--green-900);
}

.page-about .about-coverage-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.66) brightness(0.78) contrast(1.06);
}

.page-about .about-coverage-figure .media-caption {
  display: block;
  padding: 10px 16px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  border-top: 1px solid var(--about-soft);
}

.page-about .about-coverage-text {
  margin: 16px 0 24px;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--text-dim);
}

.page-about .about-coverage-list {
  margin: 0 0 26px;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-coverage-row {
  display: grid;
  gap: 4px;
  padding: 13px 2px;
  border-bottom: 1px solid var(--about-soft);
}

.page-about .about-coverage-row dt {
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--gold-soft);
}

.page-about .about-coverage-row dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text);
}

@media (min-width: 900px) {
  .page-about .about-coverage-layout {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }
  .page-about .about-coverage-row {
    grid-template-columns: 130px minmax(0, 1fr);
    align-items: baseline;
    gap: 18px;
  }
}

/* ---------- 小屏收口 ---------- */
@media (max-width: 600px) {
  .page-about .about-hero-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-version-facts {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .page-about .about-flow-step {
    flex-basis: 100%;
  }
  .page-about .about-flow-step::after {
    display: none;
  }
  .page-about .about-timeline-fold > summary::after {
    inset-block-start: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal],
  .page-about .about-tax-item {
    transition: none !important;
  }
  .has-js .page-about [data-reveal] {
    opacity: 1;
    transform: none;
  }
}