.page-about .about-crumbs {
  padding: var(--space-4) 0 0;
}

.page-about .crumbs {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-about .crumbs a {
  color: var(--color-ink-soft);
  text-decoration: none;
}

.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  color: var(--color-accent);
}

/* ---------- 开篇叙事 ---------- */

.page-about .about-open {
  padding-top: var(--space-8);
}

.page-about .about-open__grid {
  display: grid;
  gap: var(--space-8);
}

.page-about .about-open__title {
  margin: var(--space-3) 0 var(--space-4);
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: 0.04em;
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-about .about-open__intro {
  max-width: var(--measure);
  margin: 0 0 var(--space-3);
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
}

.page-about .about-open__gaps {
  list-style: none;
  max-width: var(--measure);
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.page-about .about-open__gaps li {
  position: relative;
  padding-left: 28px;
  color: var(--color-ink);
  line-height: var(--leading-body);
}

.page-about .about-open__gaps li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
}

.page-about .about-open__gaps strong {
  color: var(--color-primary);
  font-weight: var(--weight-heading);
}

.page-about .about-open__aside {
  display: grid;
  gap: var(--space-4);
  align-content: start;
}

.page-about .about-open__stat {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--color-line);
  background: linear-gradient(150deg, var(--color-primary-soft) 0%, var(--color-surface) 70%);
}

.page-about .about-open__stat-num {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  color: var(--color-primary);
  letter-spacing: 0.01em;
}

.page-about .about-open__stat-unit {
  font-size: var(--text-lg);
  font-weight: var(--weight-body);
  color: var(--color-ink-soft);
}

.page-about .about-open__stat-label {
  margin: var(--space-2) 0 0;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  line-height: 1.75;
}

.page-about .media {
  margin: 0;
}

.page-about .media__img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
}

/* ---------- 团队 ---------- */

.page-about .about-team__grid {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.page-about .about-team__stack {
  display: grid;
  gap: var(--space-3);
}

.page-about .about-team__block {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  min-width: 0;
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-line);
  background: var(--color-surface);
  box-shadow: var(--shadow-1);
  transition: background 240ms ease, border-color 240ms ease;
}

.page-about .about-team__block:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.page-about .about-team__num {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  color: var(--color-primary);
}

.page-about .about-team__num span {
  font-size: var(--text-sm);
  font-weight: var(--weight-body);
  color: var(--color-ink-muted);
}

.page-about .about-team__role {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  letter-spacing: 0.03em;
}

.page-about .about-team__desc {
  margin: 0;
  font-size: var(--text-base);
  color: var(--color-ink-soft);
  line-height: 1.72;
}

.page-about .about-team__extra {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  line-height: 1.72;
  transition: color 240ms ease;
}

.page-about .about-team__block:hover {
  background: var(--color-primary-soft);
  border-color: var(--color-primary);
}

.page-about .about-team__block:hover .about-team__extra {
  color: var(--color-ink);
}

.page-about .about-team__note {
  padding: var(--space-4);
  border-left: 1px dashed var(--color-line);
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
}

.page-about .about-team__note p {
  margin: 0;
}

/* ---------- 赛季迭代 ---------- */

.page-about .about-cycle__grid {
  display: grid;
  gap: var(--space-6);
  margin-top: var(--space-6);
}

.page-about .about-cycle__viz {
  display: grid;
  gap: var(--space-4);
  justify-items: center;
}

.page-about .about-cycle__ring {
  position: relative;
  width: min(320px, 78vw);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background:
    conic-gradient(from -90deg,
      var(--color-primary) 0 10%,
      var(--color-surface) 10% 11.1%,
      var(--color-primary-soft) 11.1% 21.1%,
      var(--color-surface) 21.1% 22.2%,
      var(--color-accent) 22.2% 32.2%,
      var(--color-surface) 32.2% 33.3%,
      var(--color-primary-soft) 33.3% 43.3%,
      var(--color-surface) 43.3% 44.4%,
      var(--color-primary) 44.4% 54.4%,
      var(--color-surface) 54.4% 55.5%,
      var(--color-primary-soft) 55.5% 65.5%,
      var(--color-surface) 65.5% 66.6%,
      var(--color-accent) 66.6% 76.6%,
      var(--color-surface) 76.6% 77.7%,
      var(--color-primary-soft) 77.7% 87.7%,
      var(--color-surface) 87.7% 88.8%,
      var(--color-primary) 88.8% 98.8%,
      var(--color-surface) 98.8% 100%);
  box-shadow: var(--shadow-1);
}

.page-about .about-cycle__ring-core {
  position: absolute;
  inset: 24%;
  border-radius: 50%;
  background: var(--color-surface);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: var(--space-2);
  text-align: center;
}

.page-about .about-cycle__ring-num {
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  color: var(--color-primary);
  line-height: 1;
}

.page-about .about-cycle__ring-label {
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

.page-about .about-cycle__caption {
  margin: 0;
  max-width: 40ch;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  line-height: 1.78;
}

.page-about .about-cycle__list {
  display: grid;
  align-content: start;
}

.page-about .about-ver {
  border-bottom: 1px dashed var(--color-line);
}

.page-about .about-ver summary {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr);
  gap: var(--space-2);
  align-items: start;
  padding: var(--space-3) 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-ver summary:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-about .about-ver__dot {
  width: 10px;
  height: 10px;
  margin-top: 0.5em;
  border-radius: 50%;
  background: var(--color-primary-soft);
  border: 1px solid var(--color-primary);
  transition: background 240ms ease, border-color 240ms ease;
}

.page-about .about-ver[open] .about-ver__dot {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.page-about .about-ver__name {
  display: block;
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  letter-spacing: 0.04em;
}

.page-about .about-ver__sum {
  display: block;
  margin-top: 2px;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  line-height: 1.7;
}

.page-about .about-ver[open] .about-ver__sum {
  color: var(--color-ink-soft);
}

.page-about .about-ver__body {
  margin: 0 0 var(--space-3);
  padding-left: 22px;
  max-width: var(--measure);
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
}

.page-about .about-ver__body a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-style: dashed;
  text-underline-offset: 3px;
}

/* ---------- 服务承诺 ---------- */

.page-about .about-promise {
  color: var(--color-contrast-ink);
}

.page-about .about-promise__grid {
  display: grid;
  gap: var(--space-6);
}

.page-about .about-promise__title {
  margin: var(--space-3) 0 var(--space-4);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  letter-spacing: 0.04em;
  font-weight: var(--weight-heading);
  color: var(--color-contrast-ink);
}

.page-about .about-promise__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
  max-width: var(--measure);
}

.page-about .about-promise__list li {
  padding-left: var(--space-3);
  border-left: 1px dashed var(--color-contrast-line);
  color: var(--color-contrast-ink);
  line-height: var(--leading-body);
}

.page-about .about-promise__list strong {
  color: var(--color-contrast-accent);
  font-weight: var(--weight-heading);
}

.page-about .about-promise__link {
  margin: var(--space-4) 0 0;
  color: var(--color-contrast-ink);
  opacity: 0.82;
  line-height: 1.75;
}

.page-about .about-promise__link a {
  color: var(--color-contrast-accent);
  text-decoration: underline;
  text-decoration-style: dashed;
  text-underline-offset: 3px;
}

.page-about .about-promise__media {
  align-self: center;
}

.page-about .about-promise__clause {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px dashed var(--color-contrast-line);
}

.page-about .about-promise__clause-label {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-contrast-accent);
}

.page-about .about-clause summary {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  cursor: pointer;
  list-style: none;
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-contrast-ink);
}

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

.page-about .about-clause summary:focus-visible {
  outline: 2px solid var(--color-contrast-accent);
  outline-offset: 3px;
}

.page-about .about-clause summary::after {
  content: "+";
  margin-left: auto;
  font-size: var(--text-xl);
  line-height: 1;
  color: var(--color-contrast-accent);
}

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

.page-about .about-clause p {
  margin: 0 0 var(--space-3);
  max-width: var(--measure);
  color: var(--color-contrast-ink);
  opacity: 0.88;
  line-height: var(--leading-body);
}

.page-about .about-clause a {
  color: var(--color-contrast-accent);
  text-decoration: underline;
  text-decoration-style: dashed;
  text-underline-offset: 3px;
}

/* ---------- 收口 ---------- */

.page-about .about-next__grid {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.page-about .about-next__item {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px dashed var(--color-line);
  background: var(--color-surface);
  text-decoration: none;
  transition: background 240ms ease, border-color 240ms ease, transform 240ms ease;
}

.page-about .about-next__item:hover,
.page-about .about-next__item:focus-visible {
  border-color: var(--color-accent);
  background: var(--color-highlight);
  transform: translateY(-2px);
}

.page-about .about-next__item:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.page-about .about-next__label {
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  letter-spacing: 0.04em;
}

.page-about .about-next__desc {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  line-height: 1.78;
}

.page-about .about-next__arrow {
  font-size: var(--text-lg);
  color: var(--color-accent);
  line-height: 1;
}

/* ---------- 桌面栅格 ---------- */

@media (min-width: 900px) {
  .page-about .about-open {
    padding-top: var(--section-y);
  }

  .page-about .about-open__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.76fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-about .about-open__title {
    font-size: var(--text-4xl);
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--space-6) var(--space-4);
  }

  .page-about .about-team__stack {
    grid-column: 1 / -1;
    grid-template-columns: 4.4fr 3.6fr 3.2fr 2.4fr;
    align-items: stretch;
  }

  .page-about .about-team__media {
    grid-column: span 5;
  }

  .page-about .about-team__note {
    grid-column: span 7;
  }

  .page-about .about-cycle__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-about .about-cycle__viz {
    justify-items: start;
  }

  .page-about .about-promise__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-8);
    align-items: center;
  }

  .page-about .about-promise__title {
    font-size: var(--text-3xl);
  }

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

@media (min-width: 1100px) {
  .page-about .about-open__grid {
    gap: var(--space-8);
  }
}
</PAGE_CSS>>>