.page-about {
  --about-rail: 236px;
  --about-card: rgba(16, 42, 63, 0.55);
  --about-card-line: rgba(169, 184, 199, 0.16);
  --about-cream: #F2EBDD;
  --about-cream-deep: #E7DCC6;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 5vw, 52px) 0 clamp(36px, 6vw, 76px);
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(110% 80% at 8% 0%, rgba(47, 227, 208, 0.14), transparent 58%),
    linear-gradient(158deg, var(--ink-deep) 0%, var(--ink) 48%, #0d2334 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -46%;
  width: 76%;
  height: 150%;
  background: linear-gradient(
    118deg,
    transparent 44%,
    rgba(47, 227, 208, 0.09) 44.4%,
    rgba(47, 227, 208, 0.09) 50%,
    transparent 50.4%
  );
  transform: rotate(-7deg);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 7.2vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--cream);
  max-width: 20ch;
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 52ch;
  font-size: clamp(0.95rem, 2.4vw, 1.05rem);
  line-height: 1.8;
  color: rgba(245, 240, 230, 0.78);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__panel {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-about .about-stamp {
  position: relative;
  display: grid;
  gap: 4px;
  padding: 20px 22px;
  border: 1px solid rgba(217, 164, 65, 0.55);
  background: linear-gradient(150deg, rgba(217, 164, 65, 0.16), rgba(217, 164, 65, 0.04));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .about-stamp__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--gold);
}

.page-about .about-stamp__year {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 8vw, 3.2rem);
  line-height: 1;
  color: var(--cream);
}

.page-about .about-stamp__note {
  font-size: 0.82rem;
  color: var(--mist);
}

.page-about .about-hero__facts {
  margin: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-fact {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  background: rgba(11, 27, 43, 0.72);
}

.page-about .about-fact dt {
  font-size: 0.8rem;
  color: var(--mist);
}

.page-about .about-fact dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--cyan);
}

/* ---------- 起源 ---------- */
.page-about .about-story__inner {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: center;
}

.page-about .about-story__text p {
  margin: 16px 0 0;
  line-height: 1.85;
  color: rgba(245, 240, 230, 0.8);
}

.page-about .about-story__points {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-story__points li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 14px;
  border-left: 2px solid var(--line-cyan);
  background: rgba(16, 42, 63, 0.4);
  font-size: 0.92rem;
  line-height: 1.7;
  color: rgba(245, 240, 230, 0.86);
}

.page-about .about-story__no {
  flex: none;
  font-family: var(--font-mono);
  color: var(--gold);
  font-size: 0.85rem;
}

.page-about .about-story__media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-soft);
}

.page-about .about-story__media img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline__head {
  max-width: 60ch;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-timeline {
  display: grid;
  gap: 26px;
}

.page-about .about-rail {
  border: 1px solid var(--line);
  background: rgba(16, 42, 63, 0.45);
  padding: 16px 18px;
}

.page-about .about-rail__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail__list li {
  flex: none;
}

.page-about .about-rail__list .anchor-link {
  display: block;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 7px 11px;
  border: 1px solid var(--line);
  color: var(--mist);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-about .about-rail__list .anchor-link:hover,
.page-about .about-rail__list .anchor-link:focus-visible {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .about-rail__note {
  margin: 14px 0 0;
  font-size: 0.76rem;
  color: var(--mist);
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-line {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 46px;
}

.page-about .about-line::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 10px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(47, 227, 208, 0.18) 72%, transparent);
}

.page-about .about-line__item {
  position: relative;
  margin-bottom: 12px;
}

.page-about .about-line__item::before {
  content: "";
  position: absolute;
  left: -36px;
  top: 20px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
}

.page-about .about-stage {
  border: 1px solid var(--about-card-line);
  background: var(--about-card);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.page-about .about-stage[open] {
  border-color: var(--line-cyan);
  background: rgba(16, 42, 63, 0.78);
}

.page-about .about-stage__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

.page-about .about-stage__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-stage__summary::marker {
  content: "";
}

.page-about .about-stage__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-about .about-stage__title {
  flex: 1 1 auto;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--cream);
  line-height: 1.5;
}

.page-about .about-stage__cue {
  flex: none;
  position: relative;
  width: 16px;
  height: 16px;
}

.page-about .about-stage__cue::before,
.page-about .about-stage__cue::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.page-about .about-stage__cue::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}

.page-about .about-stage__cue::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
}

.page-about .about-stage[open] .about-stage__cue::after {
  opacity: 0;
  transform: scaleY(0);
}

.page-about .about-stage__body {
  padding: 0 16px 16px;
  border-top: 1px solid var(--line-soft);
  margin-top: 2px;
}

.page-about .about-stage__body p {
  margin: 14px 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(245, 240, 230, 0.76);
}

.page-about .about-timeline__figure {
  margin: 32px 0 0;
  border: 1px solid var(--line);
  background: rgba(16, 42, 63, 0.5);
}

.page-about .about-timeline__figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

/* ---------- 团队 ---------- */
.page-about .about-team__inner {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .about-team__media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-soft);
}

.page-about .about-team__media img {
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .about-team__list {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}

.page-about .about-duty {
  border: 1px solid var(--about-card-line);
  border-left: 3px solid rgba(255, 107, 74, 0.55);
  background: rgba(16, 42, 63, 0.5);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.page-about .about-duty[open] {
  border-left-color: var(--coral);
  background: rgba(16, 42, 63, 0.82);
}

.page-about .about-duty__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 15px;
  cursor: pointer;
  list-style: none;
}

.page-about .about-duty__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-duty__summary::marker {
  content: "";
}

.page-about .about-duty__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--coral);
}

.page-about .about-duty__name {
  flex: 1 1 auto;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--cream);
  line-height: 1.5;
}

.page-about .about-duty__cue {
  flex: none;
  width: 14px;
  height: 14px;
  position: relative;
}

.page-about .about-duty__cue::before,
.page-about .about-duty__cue::after {
  content: "";
  position: absolute;
  background: var(--mist);
}

.page-about .about-duty__cue::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-about .about-duty__cue::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.page-about .about-duty[open] .about-duty__cue::after {
  opacity: 0;
  transform: scaleY(0);
}

.page-about .about-duty__body {
  margin: 0;
  padding: 0 15px 15px;
  font-size: 0.88rem;
  line-height: 1.8;
  color: rgba(245, 240, 230, 0.74);
}

/* ---------- 认证（浅色块，形成节奏切换） ---------- */
.page-about .about-cert__panel {
  display: grid;
  gap: clamp(22px, 3.5vw, 40px);
  padding: clamp(24px, 4vw, 46px);
  background: linear-gradient(145deg, var(--about-cream) 0%, var(--about-cream-deep) 100%);
  color: var(--ink);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-about .eyebrow--on-light {
  color: var(--teal);
}

.page-about .about-cert__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4.6vw, 2.3rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-cert__lede {
  margin: 14px 0 0;
  max-width: 42ch;
  font-size: 0.92rem;
  line-height: 1.85;
  color: rgba(11, 27, 43, 0.72);
}

.page-about .about-cert__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(11, 27, 43, 0.16);
}

.page-about .about-cert__item {
  display: flex;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(11, 27, 43, 0.16);
}

.page-about .about-cert__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--teal);
  padding-top: 3px;
}

.page-about .about-cert__text h3 {
  margin: 0;
  font-size: 0.98rem;
  font-family: var(--font-display);
  color: var(--ink);
}

.page-about .about-cert__text p {
  margin: 6px 0 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: rgba(11, 27, 43, 0.72);
}

.page-about .about-cert__value {
  font-family: var(--font-mono);
  font-size: 0.86rem !important;
  color: var(--ink) !important;
  word-break: break-all;
}

.page-about .about-cert__text .copy-btn {
  margin-top: 10px;
  font-size: 0.76rem;
  padding: 6px 12px;
  border: 1px solid var(--teal);
  background: transparent;
  color: var(--teal);
  cursor: pointer;
  font-family: var(--font-body);
  transition: background 0.2s ease, color 0.2s ease;
}

.page-about .about-cert__text .copy-btn:hover,
.page-about .about-cert__text .copy-btn:focus-visible {
  background: var(--teal);
  color: var(--cream);
}

.page-about .about-cert__item {
  background: transparent;
}

/* ---------- 服务与覆盖 ---------- */
.page-about .about-service__head {
  max-width: 60ch;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-service__grid {
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-service__stat {
  padding: 22px 20px;
  background: linear-gradient(160deg, rgba(16, 42, 63, 0.9), rgba(11, 27, 43, 0.95));
}

.page-about .about-service__num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 9vw, 3.4rem);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-about .about-service__small {
  font-size: 0.42em;
  margin-left: 2px;
  color: var(--mist);
}

.page-about .about-service__unit {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .about-service__stat p {
  margin: 12px 0 0;
  font-size: 0.86rem;
  line-height: 1.75;
  color: rgba(245, 240, 230, 0.7);
}

.page-about .about-service__rules {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.page-about .about-service__rule {
  padding: 18px 18px 18px 20px;
  border-left: 2px solid var(--line-cyan);
  background: rgba(16, 42, 63, 0.42);
}

.page-about .about-service__rule h3 {
  margin: 0;
  font-size: 0.95rem;
  font-family: var(--font-display);
  color: var(--cream);
}

.page-about .about-service__rule p {
  margin: 8px 0 0;
  font-size: 0.87rem;
  line-height: 1.8;
  color: rgba(245, 240, 230, 0.74);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners__head {
  max-width: 62ch;
  margin-bottom: clamp(24px, 4vw, 38px);
}

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

.page-about .about-partners__card {
  position: relative;
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  background: rgba(16, 42, 63, 0.45);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-about .about-partners__card:hover {
  transform: translateY(-3px);
  border-color: rgba(217, 164, 65, 0.5);
}

.page-about .about-partners__num {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 6vw, 2.4rem);
  line-height: 1;
  color: var(--gold);
}

.page-about .about-partners__card h3 {
  margin: 10px 0 0;
  font-size: 0.92rem;
  font-family: var(--font-display);
  color: var(--cream);
}

.page-about .about-partners__card p {
  margin: 10px 0 0;
  font-size: 0.86rem;
  line-height: 1.78;
  color: rgba(245, 240, 230, 0.7);
}

/* ---------- 下一步 ---------- */
.page-about .about-next__inner {
  display: grid;
  gap: 22px;
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--line-cyan);
  background:
    radial-gradient(120% 120% at 100% 0%, rgba(255, 107, 74, 0.12), transparent 56%),
    rgba(16, 42, 63, 0.6);
}

.page-about .about-next__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 4.4vw, 2rem);
  color: var(--cream);
  letter-spacing: -0.01em;
}

.page-about .about-next__copy p {
  margin: 10px 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(245, 240, 230, 0.74);
  max-width: 44ch;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__panel {
    grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
    align-items: start;
    gap: 20px;
  }

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    align-items: end;
    gap: 56px;
  }

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

  .page-about .about-story__inner {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  }

  .page-about .about-timeline {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 96px;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
  }

  .page-about .about-rail__list .anchor-link {
    white-space: normal;
  }

  .page-about .about-line {
    padding-left: 34px;
  }

  .page-about .about-line::before {
    left: 9px;
  }

  .page-about .about-line__item::before {
    left: -30px;
  }

  .page-about .about-team__inner {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
  }

  .page-about .about-cert__panel {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
    gap: 48px;
  }

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

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 40px;
  }

  .page-about .about-next__actions {
    justify-content: flex-end;
  }
}
<<<END>>>