.page-about {
  --about-axis: 40px;
  --about-axis-line: 13px;
  --about-dot: 11px;
  --about-card-pad: 20px;
  padding-bottom: 8px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 8px 0 40px;
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -120px;
  right: -180px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 40%, rgba(31, 107, 67, 0.42), rgba(11, 13, 16, 0) 68%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 32px;
  padding-top: 24px;
}

.page-about .about-hero__title {
  margin: 12px 0 18px;
  font-size: clamp(30px, 7.6vw, 68px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--text);
}

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

.page-about .about-hero__lede {
  max-width: 34em;
  color: var(--text-dim);
  font-size: var(--fs-base);
  line-height: 1.75;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* 首屏视觉 */
.page-about .about-hero__art {
  position: relative;
  min-height: 232px;
  display: grid;
  place-items: center;
  isolation: isolate;
}

.page-about .art-slab {
  position: absolute;
  border-radius: var(--radius-lg);
  z-index: -1;
}

.page-about .art-slab--back {
  inset: 18px 6px 34px 22px;
  background: linear-gradient(140deg, rgba(232, 180, 90, 0.16), rgba(11, 13, 16, 0) 62%);
  border: 1px solid var(--line);
  transform: rotate(-4deg);
}

.page-about .art-slab--mid {
  inset: 40px 26px 8px 4px;
  background: linear-gradient(200deg, rgba(31, 107, 67, 0.5), rgba(11, 13, 16, 0.1) 72%);
  border: 1px solid rgba(61, 220, 132, 0.18);
  transform: rotate(3deg);
}

.page-about .art-panel {
  width: 100%;
  max-width: 340px;
  padding: 22px;
  border-radius: var(--radius-md);
  background: linear-gradient(160deg, var(--surface-2), var(--ink-900) 86%);
  border: 1px solid var(--line-strong);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
}

.page-about .art-panel__tag {
  display: block;
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  color: var(--gold-500);
}

.page-about .art-panel__big {
  display: block;
  margin: 6px 0 16px;
  font-family: var(--font-mono);
  font-size: 44px;
  line-height: 1;
  font-weight: 700;
  color: var(--text);
}

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

.page-about .art-panel__rows li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-size: var(--fs-xs);
  color: var(--text-dim);
}

.page-about .art-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex: 0 0 auto;
  animation: about-breathe 3s ease-in-out infinite;
}

.page-about .art-dot--green { background: var(--status-green); box-shadow: 0 0 10px rgba(61, 220, 132, 0.6); }
.page-about .art-dot--gold { background: var(--gold-500); }
.page-about .art-dot--red { background: var(--cinnabar); animation: none; }

@keyframes about-breathe {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* 数字行 */
.page-about .about-stats {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-stats__item {
  padding: 18px 16px;
  background: var(--ink-900);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-stats__num {
  font-family: var(--font-mono);
  font-size: clamp(32px, 9vw, 52px);
  line-height: 1;
  font-weight: 700;
  color: var(--gold-500);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stats__label {
  font-size: var(--fs-xs);
  line-height: 1.6;
  color: var(--text-dim);
}

/* ---------- 通用区块 ---------- */
.page-about .section {
  padding: 52px 0 0;
}

.page-about .section__head {
  max-width: 46em;
  margin-bottom: 28px;
}

.page-about .section__title {
  margin: 10px 0 14px;
  font-size: clamp(24px, 5.6vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--text);
}

.page-about .section__head .lede {
  color: var(--text-dim);
  font-size: var(--fs-base);
  line-height: 1.8;
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin__split {
  display: grid;
  gap: 24px;
}

.page-about .about-origin__text p {
  margin: 0;
  font-size: var(--fs-base);
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.92;
}

.page-about .about-origin__text p + p {
  margin-top: 16px;
}

.page-about .about-origin__aside {
  padding: 22px;
  border-radius: var(--radius-md);
  background: linear-gradient(170deg, rgba(232, 180, 90, 0.1), rgba(30, 36, 43, 0.9) 60%);
  border: 1px solid var(--line-gold);
}

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

.page-about .about-bullets li {
  display: grid;
  gap: 4px;
  padding-left: 14px;
  border-left: 2px solid var(--line-gold);
}

.page-about .about-bullets strong {
  font-size: var(--fs-sm);
  color: var(--gold-300);
  font-weight: 700;
}

.page-about .about-bullets span {
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-bullets--lined li {
  border-left: 2px solid var(--line-strong);
}

.page-about .about-bullets--lined strong {
  color: var(--paper);
}

/* ---------- 02 时间轴 ---------- */
.page-about .about-timeline__banner {
  margin-bottom: 26px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-about .about-timeline__banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  filter: saturate(0.85) brightness(0.9);
}

.page-about .about-timeline__banner .media-frame__caption {
  padding: 10px 16px 14px;
  font-size: var(--fs-xs);
  color: var(--text-dim);
}

.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.page-about .about-jump__chip {
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: var(--ink-800);
  font-size: var(--fs-xs);
  color: var(--text-dim);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-jump__chip:hover,
.page-about .about-jump__chip:focus-visible {
  color: var(--ink-900);
  background: var(--gold-500);
  border-color: var(--gold-500);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--about-axis);
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: var(--about-axis-line);
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, rgba(232, 180, 90, 0.55), rgba(232, 180, 90, 0.12) 70%, rgba(232, 180, 90, 0) 100%);
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 34px;
  scroll-margin-top: 96px;
  transition: opacity var(--dur) var(--ease);
}

.page-about .tl-item:last-child {
  padding-bottom: 8px;
}

.page-about .tl-item__dot {
  position: absolute;
  left: calc(var(--about-axis-line) - var(--about-axis) - 4px);
  top: 6px;
  width: var(--about-dot);
  height: var(--about-dot);
  border-radius: 50%;
  border: 2px solid var(--ink-900);
  box-sizing: content-box;
}

.page-about .tl-item__dot--green { background: var(--status-green); }
.page-about .tl-item__dot--gold { background: var(--gold-500); }
.page-about .tl-item__dot--red { background: var(--cinnabar); }

.page-about .tl-item:target .tl-item__dot {
  box-shadow: 0 0 0 6px rgba(232, 180, 90, 0.18);
}

.page-about .tl-item__meta {
  font-size: var(--fs-xs);
  letter-spacing: 0.06em;
  color: var(--gold-500);
  margin: 0 0 6px;
}

.page-about .tl-item__title {
  margin: 0 0 8px;
  font-size: var(--fs-md);
  line-height: 1.5;
  font-weight: 700;
  color: var(--text);
}

.page-about .tl-item__body {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--text-dim);
  max-width: 42em;
}

.page-about .tl-item.is-lit .tl-item__title {
  color: var(--gold-300);
}

/* ---------- 03 团队 ---------- */
.page-about .about-team__head {
  display: grid;
  gap: 22px;
  margin-bottom: 26px;
}

.page-about .about-team__headtext {
  margin-bottom: 0;
}

.page-about .about-team__media {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: grayscale(0.35) brightness(0.85);
}

.page-about .about-team__media .media-frame__caption {
  padding: 10px 16px 14px;
  font-size: var(--fs-xs);
  color: var(--text-dim);
}

.page-about .about-groups {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .group-card {
  padding: var(--about-card-pad);
  border: 1px solid var(--line);
  background: var(--ink-800);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .group-card--a {
  border-radius: 26px 26px 26px 6px;
  background: linear-gradient(155deg, rgba(232, 180, 90, 0.14), var(--ink-800) 58%);
}

.page-about .group-card--b {
  border-radius: 6px 24px 24px 24px;
  background: linear-gradient(200deg, rgba(31, 107, 67, 0.36), var(--ink-800) 66%);
}

.page-about .group-card--c {
  border-radius: 24px 24px 6px 24px;
  background: linear-gradient(170deg, rgba(194, 69, 60, 0.16), var(--ink-800) 62%);
}

.page-about .group-card--d {
  border-radius: 24px 6px 24px 24px;
  background: linear-gradient(135deg, rgba(242, 212, 155, 0.1), rgba(30, 36, 43, 0.95) 60%);
}

.page-about .group-card:hover,
.page-about .group-card:focus-within {
  transform: translateY(-3px);
  border-color: var(--line-gold);
}

.page-about .group-card__num {
  margin: 0 0 8px;
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  color: var(--gold-500);
}

.page-about .group-card__title {
  margin: 0 0 10px;
  font-size: var(--fs-md);
  line-height: 1.4;
  font-weight: 800;
  color: var(--paper);
}

.page-about .group-card__body {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .group-card__note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line-strong);
  font-size: var(--fs-xs);
  line-height: 1.7;
  color: var(--gold-300);
}

/* ---------- 04 节奏 ---------- */
.page-about .about-cadence__grid {
  display: grid;
  gap: 12px;
}

.page-about .cadence-card {
  padding: 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-about .cadence-card__tag {
  display: inline-block;
  margin: 0 0 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(232, 180, 90, 0.14);
  border: 1px solid var(--line-gold);
  font-size: var(--fs-xs);
  color: var(--gold-300);
}

.page-about .cadence-card__title {
  margin: 0 0 8px;
  font-size: var(--fs-md);
  font-weight: 800;
  color: var(--text);
}

.page-about .cadence-card__body {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-flow {
  margin-top: 20px;
  padding: 22px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, var(--surface), var(--ink-900));
}

.page-about .about-flow__label {
  display: block;
  margin: 0 0 16px;
  color: var(--gold-500);
}

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

.page-about .about-flow__steps li {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--text-dim);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-flow__steps .mono {
  font-size: var(--fs-xs);
  color: var(--status-green);
}

/* ---------- 05 覆盖 ---------- */
.page-about .about-coverage__split {
  display: grid;
  gap: 24px;
}

.page-about .about-coverage__text .section__head {
  margin-bottom: 20px;
}

.page-about .about-coverage__note {
  margin: 18px 0 12px;
  padding: 14px 16px;
  border-left: 2px solid var(--gold-500);
  background: rgba(232, 180, 90, 0.07);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: var(--fs-sm);
  line-height: 1.75;
  color: var(--paper);
}

.page-about .about-coverage__media {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-about .about-coverage__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  opacity: 0.9;
}

.page-about .about-coverage__media .media-frame__caption {
  padding: 10px 16px 14px;
  font-size: var(--fs-xs);
  color: var(--text-dim);
}

/* ---------- 06 标准 ---------- */
.page-about .about-standard__grid {
  display: grid;
  gap: 12px;
}

.page-about .std-card {
  position: relative;
  padding: 18px 18px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--ink-800);
  overflow: hidden;
}

.page-about .std-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 44px;
  height: 2px;
  background: var(--gold-500);
}

.page-about .std-card__num {
  margin: 0 0 10px;
  font-size: var(--fs-xs);
  letter-spacing: 0.16em;
  color: var(--gold-500);
}

.page-about .std-card__title {
  margin: 0 0 8px;
  font-size: var(--fs-base);
  font-weight: 800;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .std-card__body {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 07 协作 ---------- */
.page-about .about-partners__split {
  display: grid;
  gap: 18px;
  padding: 26px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: linear-gradient(165deg, rgba(31, 107, 67, 0.22), var(--ink-900) 70%);
}

.page-about .about-partners__head {
  margin-bottom: 0;
}

.page-about .about-partners__body p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--text-dim);
}

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

.page-about .about-partners__list li {
  display: grid;
  gap: 3px;
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--text-dim);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: rgba(11, 13, 16, 0.5);
  border: 1px solid var(--line);
}

.page-about .about-partners__list .mono {
  font-size: var(--fs-xs);
  color: var(--status-green);
  letter-spacing: 0.06em;
}

/* ---------- CTA ---------- */
.page-about .about-cta {
  margin-top: 56px;
  padding: 40px 0 48px;
  background: linear-gradient(120deg, rgba(232, 180, 90, 0.14), rgba(31, 107, 67, 0.18) 55%, rgba(11, 13, 16, 0));
  border-top: 1px solid var(--line-gold);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 22px;
}

.page-about .about-cta__title {
  margin: 10px 0 10px;
  font-size: clamp(22px, 5vw, 34px);
  line-height: 1.25;
  font-weight: 800;
  color: var(--text);
}

.page-about .about-cta__body {
  margin: 0;
  max-width: 34em;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--text-dim);
}

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

/* ---------- 移动端收口 ---------- */
.page-about :where(img) {
  max-width: 100%;
}

/* ---------- 768px ---------- */
@media (min-width: 768px) {
  .page-about {
    --about-axis: 76px;
    --about-axis-line: 21px;
    --about-dot: 13px;
    --about-card-pad: 26px;
  }

  .page-about .about-hero {
    padding: 16px 0 56px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.85fr);
    align-items: center;
    gap: 40px;
  }

  .page-about .about-br {
    display: block;
  }

  .page-about .about-hero__art {
    min-height: 330px;
  }

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

  .page-about .about-stats__item {
    padding: 22px 18px;
  }

  .page-about .section {
    padding-top: 72px;
  }

  .page-about .about-origin__split,
  .page-about .about-coverage__split {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .about-coverage__split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    align-items: center;
  }

  .page-about .about-team__head {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.8fr);
    gap: 32px;
    align-items: end;
  }

  .page-about .about-groups {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .group-card--wide {
    grid-column: span 4;
  }

  .page-about .group-card--narrow {
    grid-column: span 2;
  }

  .page-about .about-cadence__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-standard__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-flow {
    padding: 26px 28px;
  }

  .page-about .about-flow__steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 26px;
  }

  .page-about .about-flow__steps li:nth-last-child(2) {
    border-bottom: 1px solid var(--line);
  }

  .page-about .about-partners__split {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.5fr);
    gap: 32px;
    padding: 34px 30px;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.5fr) auto;
    align-items: center;
    gap: 30px;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }

  .page-about .tl-item {
    padding-bottom: 40px;
  }
}

/* ---------- 1024px ---------- */
@media (min-width: 1024px) {
  .page-about .about-hero__title {
    letter-spacing: -0.03em;
  }

  .page-about .about-groups {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-about .group-card--a { grid-column: span 7; }
  .page-about .group-card--b { grid-column: span 5; }
  .page-about .group-card--c { grid-column: span 5; }
  .page-about .group-card--d { grid-column: span 7; }

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

  .page-about .tl-item__title {
    font-size: var(--fs-lg);
    line-height: 1.35;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .art-dot {
    animation: none;
  }

  .page-about .group-card,
  .page-about .about-jump__chip,
  .page-about .tl-item {
    transition: none;
  }

  .page-about .group-card:hover,
  .page-about .group-card:focus-within {
    transform: none;
  }
}
<<<END>>>