.page-about {
  background: var(--ink-night);
  color: var(--ice);
  position: relative;
}

.page-about .about-hero {
  padding: clamp(20px, 4vw, 44px) 0 clamp(32px, 5vw, 64px);
}

.page-about .hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 52px);
  align-items: end;
}

.page-about .hero-title {
  font-family: var(--font-display);
  font-size: var(--fs-8);
  line-height: 1.02;
  letter-spacing: -0.03em;
  color: var(--white);
  margin: 14px 0 20px;
  max-width: 15ch;
}

.page-about .hero-text {
  font-size: var(--fs-4);
  line-height: var(--lh-body);
  color: var(--ice);
  max-width: 40em;
  margin: 0 0 26px;
}

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

.page-about .hero-figure {
  border: 1px solid var(--glass-line);
  background: var(--lake);
}

.page-about .hero-figure .media-frame__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .media-frame__caption {
  font-size: var(--fs-1);
  line-height: 1.6;
  color: var(--mist);
  padding: 10px 4px 0;
}

.page-about .hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: clamp(18px, 2.4vw, 26px) 0 0;
  list-style: none;
  border-top: 1px solid var(--glass-line);
}

.page-about .hero-fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .fact-num {
  font-family: var(--font-mono);
  font-size: var(--fs-5);
  letter-spacing: -0.01em;
  color: var(--lime);
}

.page-about .fact-label {
  font-size: var(--fs-2);
  color: var(--mist);
  line-height: 1.5;
}

.page-about .about-lead .lead-spread {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 36px);
}

.page-about .aside-note {
  font-size: var(--fs-3);
  line-height: 1.8;
  color: var(--mist);
  border-left: 2px solid var(--glass-line);
  padding-left: 16px;
  margin: 12px 0 0;
}

.page-about .lead-prose p {
  font-size: var(--fs-3);
  line-height: 1.85;
  color: var(--ice);
  margin: 0 0 1.15em;
  max-width: 42em;
}

.page-about .lead-prose p:first-child {
  font-size: var(--fs-4);
  color: var(--white);
}

.page-about .section-kicker {
  font-size: var(--fs-2);
  line-height: 1.7;
  color: var(--mist);
  max-width: 26em;
  margin: 0;
}

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

.page-about .renew-card {
  background: var(--glass);
  border: 1px solid var(--glass-line);
  padding: clamp(20px, 3vw, 32px);
  transition: border-color var(--fast) ease, background-color var(--fast) ease;
}

.page-about .renew-card:hover,
.page-about .renew-card:focus-within {
  border-color: var(--lime);
  background: var(--lime-dim);
}

.page-about .renew-num {
  font-family: var(--font-mono);
  font-size: var(--fs-7);
  line-height: 1;
  color: var(--lime);
  margin: 0 0 10px;
  letter-spacing: -0.02em;
}

.page-about .renew-rule {
  display: block;
  width: 40px;
  height: 2px;
  background: var(--lime);
  margin-bottom: 18px;
}

.page-about .renew-title {
  font-size: var(--fs-4);
  line-height: 1.35;
  color: var(--white);
  margin: 0 0 12px;
}

.page-about .renew-body {
  font-size: var(--fs-3);
  line-height: 1.8;
  color: var(--ice);
  margin: 0 0 18px;
}

.page-about .renew-tag {
  display: inline-block;
}

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

.page-about .aud-card {
  border-top: 1px solid var(--glass-line);
  padding: 20px 0 6px;
}

.page-about .aud-card:hover {
  border-top-color: var(--amber);
}

.page-about .aud-title {
  font-size: var(--fs-4);
  color: var(--white);
  margin: 0 0 10px;
  letter-spacing: -0.02em;
}

.page-about .aud-body {
  font-size: var(--fs-3);
  line-height: 1.8;
  color: var(--ice);
  margin: 0;
  max-width: 38em;
}

.page-about .method-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.5vw, 46px);
}

.page-about .method-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding: 22px 0;
  border-top: 1px solid var(--glass-line);
}

.page-about .method-item:last-child {
  border-bottom: 1px solid var(--glass-line);
}

.page-about .method-num {
  font-family: var(--font-mono);
  font-size: var(--fs-2);
  color: var(--lime);
  margin: 4px 0 0;
}

.page-about .method-title {
  font-size: var(--fs-4);
  color: var(--white);
  margin: 0 0 10px;
}

.page-about .method-body {
  font-size: var(--fs-3);
  line-height: 1.8;
  color: var(--ice);
  margin: 0;
  max-width: 40em;
}

.page-about .method-cta {
  margin-top: 18px;
}

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

.page-about .method-figure {
  border: 1px solid var(--glass-line);
  background: var(--lake);
}

.page-about .method-figure .media-frame__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .field-card {
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--paper);
  color: var(--ink);
}

.page-about .field-title {
  font-family: var(--font-mono);
  font-size: var(--fs-2);
  letter-spacing: 0.02em;
  color: var(--ink);
  margin: 0 0 14px;
}

.page-about .field-card .meta-list {
  margin: 0;
}

.page-about .field-card .meta-list__key {
  font-family: var(--font-mono);
  font-size: var(--fs-1);
  color: var(--ink);
}

.page-about .field-card .meta-list__val {
  font-size: var(--fs-2);
  color: var(--ink);
  opacity: 0.82;
}

.page-about .stage-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
}

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

.page-about .stage-figure {
  border: 1px solid var(--glass-line);
  background: var(--lake);
}

.page-about .stage-figure .media-frame__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.9;
}

.page-about .stage-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .stage-jump__link {
  font-family: var(--font-mono);
  font-size: var(--fs-1);
  letter-spacing: 0.02em;
  color: var(--ice);
  text-decoration: none;
  border: 1px solid var(--glass-line);
  padding: 7px 10px;
  transition: border-color var(--fast) ease, color var(--fast) ease, background-color var(--fast) ease;
}

.page-about .stage-jump__link:hover,
.page-about .stage-jump__link:focus-visible {
  border-color: var(--lime);
  color: var(--lime);
  background: var(--lime-dim);
}

.page-about .stage-track {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
}

.page-about .stage-track::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(to bottom, var(--lime), var(--glass-line) 62%, transparent);
}

.page-about .stage-item {
  position: relative;
  padding-bottom: 28px;
}

.page-about .stage-item:last-child {
  padding-bottom: 0;
}

.page-about .stage-item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink-night);
  border: 2px solid var(--lime);
}

.page-about .stage-num {
  font-family: var(--font-mono);
  font-size: var(--fs-1);
  letter-spacing: 0.08em;
  color: var(--mist);
  margin: 0 0 8px;
}

.page-about .stage-title {
  font-size: var(--fs-4);
  color: var(--white);
  margin: 0 0 10px;
  letter-spacing: -0.02em;
}

.page-about .stage-body {
  font-size: var(--fs-3);
  line-height: 1.8;
  color: var(--ice);
  margin: 0;
  max-width: 40em;
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-about .team-card {
  background: var(--plateau);
  border-left: 2px solid var(--lime);
  padding: clamp(18px, 2.6vw, 26px);
}

.page-about .team-num {
  font-family: var(--font-mono);
  font-size: var(--fs-2);
  color: var(--amber);
  margin: 0 0 12px;
}

.page-about .team-title {
  font-size: var(--fs-4);
  color: var(--white);
  margin: 0 0 10px;
}

.page-about .team-body {
  font-size: var(--fs-3);
  line-height: 1.8;
  color: var(--ice);
  margin: 0;
}

.page-about .trust-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.5vw, 44px);
  background: var(--paper);
  color: var(--ink);
  padding: clamp(24px, 4vw, 48px);
}

.page-about .eyebrow--ink {
  color: var(--ink);
  opacity: 0.6;
}

.page-about .trust-title {
  font-family: var(--font-display);
  font-size: var(--fs-6);
  letter-spacing: -0.03em;
  color: var(--ink);
  margin: 12px 0 16px;
  max-width: 18ch;
}

.page-about .trust-body {
  font-size: var(--fs-3);
  line-height: 1.8;
  color: var(--ink);
  margin: 0 0 22px;
  max-width: 36em;
}

.page-about .trust-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .btn--dark {
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
}

.page-about .btn--dark:hover,
.page-about .btn--dark:focus-visible {
  background: var(--plateau);
  border-color: var(--plateau);
  color: var(--white);
}

.page-about .btn--outline-dark {
  background: transparent;
  color: var(--ink);
  border: 1px solid rgba(6, 35, 44, 0.35);
}

.page-about .btn--outline-dark:hover,
.page-about .btn--outline-dark:focus-visible {
  border-color: var(--ink);
  background: rgba(6, 35, 44, 0.06);
}

.page-about .trust-side {
  display: grid;
  gap: 0;
  align-content: start;
  border-top: 1px solid rgba(6, 35, 44, 0.18);
}

.page-about .trust-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(6, 35, 44, 0.14);
}

.page-about .trust-key {
  font-family: var(--font-mono);
  font-size: var(--fs-1);
  letter-spacing: 0.02em;
  color: var(--ink);
  opacity: 0.62;
}

.page-about .trust-val {
  font-size: var(--fs-3);
  line-height: 1.7;
  color: var(--ink);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  word-break: break-word;
}

.page-about .trust-mail {
  font-family: var(--font-mono);
  font-size: var(--fs-2);
}

.page-about .copy-mail {
  font-family: var(--font-mono);
  font-size: var(--fs-1);
  letter-spacing: 0.02em;
  color: var(--ink);
  background: transparent;
  border: 1px solid rgba(6, 35, 44, 0.3);
  padding: 5px 10px;
  cursor: pointer;
  transition: border-color var(--fast) ease, background-color var(--fast) ease;
}

.page-about .copy-mail:hover,
.page-about .copy-mail:focus-visible {
  border-color: var(--ink);
  background: rgba(6, 35, 44, 0.06);
}

.page-about .copy-mail[data-copied]::after {
  content: "已复制";
  margin-left: 8px;
}

@media (min-width: 720px) {
  .page-about .hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .aud-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 26px;
  }

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

  .page-about .trust-row {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 12px;
    align-items: baseline;
  }
}

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

  .page-about .about-lead .lead-spread {
    grid-template-columns: minmax(0, 3fr) minmax(0, 7fr);
    gap: clamp(28px, 4vw, 60px);
  }

  .page-about .renew-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .renew-card:nth-child(2) {
    margin-top: 34px;
  }

  .page-about .renew-card:nth-child(3) {
    margin-top: 68px;
  }

  .page-about .method-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .stage-layout {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: clamp(32px, 4vw, 64px);
  }

  .page-about .stage-track {
    padding-left: 38px;
  }

  .page-about .stage-item::before {
    left: -37px;
  }

  .page-about .trust-wrap {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
}

@media (min-width: 1100px) {
  .page-about .aud-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 24px;
  }

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

  .page-about .aud-card:nth-child(1) {
    grid-column: span 5;
  }

  .page-about .aud-card:nth-child(2) {
    grid-column: span 4;
    margin-top: 42px;
  }

  .page-about .aud-card:nth-child(3) {
    grid-column: span 3;
    margin-top: 84px;
  }

  .page-about .aud-card--wide {
    grid-column: 2 / span 6;
    margin-top: 10px;
  }

  .page-about .team-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .team-card:nth-child(1) {
    grid-column: span 4;
  }

  .page-about .team-card:nth-child(2) {
    grid-column: span 5;
    margin-top: 46px;
  }

  .page-about .team-card:nth-child(3) {
    grid-column: span 3;
    margin-top: 92px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .renew-card,
  .page-about .stage-jump__link,
  .page-about .copy-mail {
    transition: none;
  }
}
<<<END>>>