.page-about {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .about-crumb {
  padding-top: 1.25rem;
  padding-bottom: 0.25rem;
}

.page-about .about-crumb .breadcrumbs {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 1.25rem 0 2.5rem;
  background:
    radial-gradient(120% 90% at 8% 0%, rgba(185, 194, 189, 0.62) 0%, rgba(247, 246, 241, 0) 58%),
    linear-gradient(180deg, rgba(246, 199, 174, 0.28) 0%, rgba(247, 246, 241, 0) 42%),
    var(--paper);
  border-bottom: 1px solid var(--line-strong);
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
  align-items: end;
}

.page-about .about-hero__text {
  min-width: 0;
}

.page-about .about-hero h1 {
  margin: 0.6rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.25rem, 8vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -0.04em;
  color: var(--ink);
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin: 1.1rem 0 0;
  max-width: 40ch;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-about .about-hero__facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: rgba(247, 246, 241, 0.86);
  box-shadow: var(--shadow-lift);
}

.page-about .about-hero__k {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .about-hero__v {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink);
}

.page-about .about-hero__figure {
  margin: 0;
  min-width: 0;
}

.page-about .about-hero__figure .media-slot__frame {
  border: 1px solid var(--line-strong);
  background: var(--stone);
  box-shadow: var(--shadow-paper);
  overflow: hidden;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-hero__figure .media-slot__caption {
  font-family: var(--font-note);
  font-style: italic;
  color: var(--mist);
  font-size: 0.8125rem;
  margin-top: 0.6rem;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-section {
  padding: 2.5rem 0;
  scroll-margin-top: 6rem;
}

.page-about .about-section + .about-section {
  border-top: 1px solid var(--line);
}

.page-about .about-section--last {
  background:
    linear-gradient(180deg, rgba(185, 194, 189, 0.34) 0%, rgba(247, 246, 241, 0) 70%),
    var(--paper);
}

.page-about .about-chapter {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.1rem;
  align-items: start;
}

.page-about .about-chapter__body {
  min-width: 0;
}

.page-about .about-chapter__num {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.22em;
  color: var(--teal);
}

.page-about .about-chapter__num::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line-strong);
}

.page-about .about-chapter h2 {
  margin: 0 0 0.9rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 5.4vw, 2.25rem);
  line-height: 1.18;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.page-about .about-chapter p {
  margin: 0 0 0.9rem;
  max-width: 60ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .about-chapter .about-lead {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--ink);
  font-weight: 600;
}

.page-about .about-note {
  margin: 1.1rem 0 1.2rem;
  padding: 0.7rem 0 0.7rem 0.95rem;
  border-left: 3px solid var(--peach);
  font-family: var(--font-note);
  font-style: italic;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--slate);
  max-width: 46ch;
}

.page-about .about-section:target .about-chapter__num {
  color: var(--signal);
}

.page-about .about-section:target .about-chapter__num::after {
  background: var(--signal);
}

/* ---------- 团队 ---------- */
.page-about .about-team-figure,
.page-about .about-version-figure {
  margin: 1.5rem 0 0;
}

.page-about .about-team-figure .media-slot__frame,
.page-about .about-version-figure .media-slot__frame {
  border: 1px solid var(--line-strong);
  background: var(--stone);
  box-shadow: var(--shadow-paper);
  overflow: hidden;
}

.page-about .about-team-figure img,
.page-about .about-version-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-team-figure .media-slot__caption,
.page-about .about-version-figure .media-slot__caption {
  font-family: var(--font-note);
  font-style: italic;
  color: var(--mist);
  font-size: 0.8125rem;
  margin-top: 0.6rem;
}

.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.85rem;
  margin-top: 1.5rem;
}

.page-about .about-team__card {
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-left: 4px solid var(--teal);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lift);
  padding: 0.9rem 1rem;
}

.page-about .about-team__card summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
  letter-spacing: -0.01em;
  color: var(--ink);
}

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

.page-about .about-team__card summary::before {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--signal);
  margin-right: 0.1rem;
}

.page-about .about-team__card[open] summary::before {
  content: "–";
}

.page-about .about-team__card summary:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 4px;
}

.page-about .about-team__card p {
  margin: 0.7rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--slate);
  max-width: none;
}

/* ---------- 数据 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.page-about .about-stat {
  position: relative;
  padding: 1rem 0.9rem 1.05rem;
  border: 1px solid var(--line);
  border-top: 3px solid var(--teal);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--paper) 0%, rgba(217, 210, 195, 0.42) 100%);
  box-shadow: var(--shadow-lift);
  outline-offset: 3px;
}

.page-about .about-stat:focus-visible {
  outline: 2px solid var(--signal);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.75rem, 7vw, 2.5rem);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--moss);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat__suffix {
  font-size: 0.62em;
  margin-left: 0.06em;
  letter-spacing: 0;
}

.page-about .about-stat__unit {
  display: block;
  margin-top: 0.45rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--slate);
}

.page-about .about-stat__note {
  display: block;
  margin-top: 0.45rem;
  font-family: var(--font-note);
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 版本 ---------- */
.page-about .about-versions {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
  counter-reset: version;
}

.page-about .about-version {
  position: relative;
  padding: 1rem 1rem 1.05rem 1.15rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 4px solid var(--stone);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lift);
}

.page-about .about-version--current {
  border-left-color: var(--signal);
  background: linear-gradient(120deg, rgba(246, 199, 174, 0.34) 0%, var(--paper) 62%);
}

.page-about .about-version__no {
  display: inline-block;
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--teal);
  padding: 0.18rem 0.45rem;
  background: var(--sand);
  border-radius: var(--radius);
}

.page-about .about-version--current .about-version__no {
  color: var(--paper);
  background: var(--signal);
}

.page-about .about-version h3 {
  margin: 0.55rem 0 0.4rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-version p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 原则 ---------- */
.page-about .about-rules {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
}

.page-about .about-rule {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.85rem;
  padding: 0.95rem 1rem;
  border-top: 1px solid var(--line-strong);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.6) 0%, rgba(247, 246, 241, 0) 100%);
}

.page-about .about-rule__idx {
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  color: var(--signal);
  padding-top: 0.2rem;
}

.page-about .about-rule h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-rule p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  margin-top: 2.25rem;
  padding: 1.5rem 1.15rem 1.35rem;
  border-radius: var(--radius);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(42, 140, 128, 0.42) 0%, rgba(34, 87, 79, 0) 60%),
    linear-gradient(140deg, var(--moss) 0%, var(--ink) 100%);
  color: var(--paper);
  box-shadow: var(--shadow-paper);
}

.page-about .about-cta h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.25rem, 4.6vw, 1.65rem);
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 46ch;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(247, 246, 241, 0.82);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.15rem;
}

.page-about .about-cta .about-cta__ghost {
  color: var(--paper);
  border-color: rgba(247, 246, 241, 0.55);
}

.page-about .about-cta .about-cta__ghost:hover,
.page-about .about-cta .about-cta__ghost:focus-visible {
  background: rgba(247, 246, 241, 0.14);
  border-color: var(--paper);
}

.page-about .about-cta .about-cta__links {
  margin-top: 1.1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: rgba(247, 246, 241, 0.55);
}

.page-about .about-cta__links a {
  color: var(--peach);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

/* ---------- 窄屏以上的微调 ---------- */
@media (min-width: 620px) {
  .page-about .about-section {
    padding: 3rem 0;
  }

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

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

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

  .page-about .about-rules {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 1.25rem;
  }

  .page-about .about-cta {
    padding: 2rem 1.75rem 1.75rem;
  }
}

/* ---------- 桌面：编辑部双栏 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 2rem 0 3.5rem;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 3rem;
  }

  .page-about .about-chapter {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 2.75rem;
  }

  .page-about .about-chapter__num {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
    position: sticky;
    top: 7rem;
    align-self: start;
    font-size: 1.5rem;
    line-height: 1;
    letter-spacing: 0.12em;
    color: var(--slate);
  }

  .page-about .about-chapter__num::after {
    width: 1px;
    height: auto;
    flex: 1;
    min-height: 4rem;
    background: linear-gradient(180deg, var(--line-strong) 0%, rgba(27, 33, 31, 0) 100%);
  }

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

  .page-about .about-stat__note {
    max-height: 0;
    margin-top: 0;
    opacity: 0;
    overflow: hidden;
    transition:
      max-height var(--dur) var(--ease),
      opacity var(--dur) var(--ease),
      margin-top var(--dur) var(--ease);
  }

  .page-about .about-stat:hover .about-stat__note,
  .page-about .about-stat:focus-visible .about-stat__note {
    max-height: 9rem;
    margin-top: 0.5rem;
    opacity: 1;
  }

  .page-about .about-stat:hover,
  .page-about .about-stat:focus-visible {
    border-top-color: var(--signal);
  }

  .page-about .about-rule {
    padding: 1.1rem 1rem 1.15rem;
  }

  .page-about .about-cta {
    padding: 2.25rem 2rem 2rem;
  }
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-stat__note {
    transition: none;
  }
}
<<<END>>>