.page-about {
  --about-line: rgba(182, 129, 63, 0.34);
  --about-line-soft: rgba(182, 129, 63, 0.16);
  --about-ink-soft: rgba(247, 242, 231, 0.72);
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0;
}

.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  padding: 1.25rem 0 0;
  font-size: 0.8125rem;
  color: var(--muted);
}

.page-about .about-crumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--copper);
}

.page-about .about-crumb-sep {
  color: var(--copper);
}

.page-about .about-crumb [aria-current="page"] {
  color: var(--ink);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 5vw, 3rem);
  padding-block: clamp(1.5rem, 5vw, 3.5rem) clamp(2.5rem, 6vw, 4.5rem);
}

.page-about .about-hero-main h1 {
  font-size: clamp(2rem, 7.6vw, 4.2rem);
  line-height: 1.14;
  color: var(--ink);
  margin: 0.75rem 0 0;
  max-width: 15em;
}

.page-about .about-lead {
  margin: 1.5rem 0 0;
  max-width: 34em;
  font-size: 1.0625rem;
  line-height: 1.95;
  color: var(--text);
}

.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.5rem;
  margin-top: 2.25rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
}

.page-about .about-meta-item {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
}

.page-about .about-meta-num {
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  line-height: 1;
  color: var(--crimson);
  letter-spacing: -0.02em;
}

.page-about .about-meta-label {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--muted);
}

.page-about .about-hero-side {
  display: flex;
  align-items: flex-end;
  gap: 1rem;
}

.page-about .about-figure {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--ink-2);
  width: 100%;
}

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

.page-about .about-figure--tall {
  aspect-ratio: 3 / 4;
  border: 1px solid var(--about-line);
}

.page-about .about-figure--band {
  aspect-ratio: 21 / 9;
  margin-top: 2rem;
}

.page-about .about-vertical {
  display: none;
  writing-mode: vertical-rl;
  font-family: var(--font-serif);
  font-size: 0.9375rem;
  letter-spacing: 0.35em;
  color: var(--copper);
  margin: 0;
  white-space: nowrap;
}

/* ---------- 墨色主题带 ---------- */

.page-about .about-band {
  background: var(--ink);
  color: var(--paper);
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
  padding-block: clamp(2.25rem, 6vw, 4rem);
}

.page-about .about-band-head {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-band-head h2 {
  font-size: clamp(1.5rem, 4.4vw, 2.4rem);
  line-height: 1.3;
  color: var(--paper);
}

.page-about .about-band-note {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--copper-soft);
  letter-spacing: 0.02em;
}

.page-about .about-marks {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-about .about-mark {
  padding: 1.5rem 0;
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-mark:first-child {
  border-top: none;
  padding-top: 0;
}

.page-about .about-mark-idx {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.28em;
  color: var(--copper-soft);
  margin-bottom: 0.75rem;
}

.page-about .about-mark h3 {
  font-size: 1.25rem;
  line-height: 1.45;
  color: var(--paper);
  margin-bottom: 0.6rem;
}

.page-about .about-mark p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

/* ---------- 主栏 + 侧栏台账 ---------- */

.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  padding-block: clamp(2.5rem, 7vw, 5rem);
}

.page-about .about-split-main h2 {
  font-size: clamp(1.6rem, 4.6vw, 2.6rem);
  line-height: 1.3;
  color: var(--ink);
  margin: 0.6rem 0 1.25rem;
}

.page-about .about-split-main p {
  margin: 0 0 1.1rem;
  font-size: 1rem;
  line-height: 1.95;
  color: var(--text);
  max-width: 36em;
}

.page-about .about-aside {
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-top: 3px solid var(--copper);
  border-radius: var(--radius);
  padding: clamp(1.25rem, 4vw, 1.75rem);
}

.page-about .about-aside-title {
  font-size: 1.125rem;
  color: var(--ink);
  letter-spacing: 0.04em;
  margin-bottom: 0.75rem;
}

.page-about .about-ledger .ledger-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.25rem 1rem;
  padding: 0.7rem 0;
  border-bottom: 1px dashed var(--rule-soft);
}

.page-about .about-ledger .ledger-row:last-child {
  border-bottom: none;
}

.page-about .about-ledger .ledger-key {
  font-size: 0.8125rem;
  color: var(--muted);
  letter-spacing: 0.06em;
  flex: 0 0 auto;
}

.page-about .about-ledger .ledger-val {
  font-size: 0.875rem;
  color: var(--ink);
  text-align: right;
  overflow-wrap: anywhere;
}

.page-about .about-ledger .ledger-num {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: -0.01em;
}

.page-about .about-aside-note {
  margin: 1rem 0 0;
  padding-top: 0.9rem;
  border-top: 1px solid var(--rule);
  font-size: 0.8125rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 两栏费用对照 ---------- */

.page-about .about-compare {
  background: var(--sand);
  padding-block: clamp(2.5rem, 7vw, 4.5rem);
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-compare-head {
  max-width: 42em;
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-compare-head h2 {
  font-size: clamp(1.5rem, 4.4vw, 2.4rem);
  line-height: 1.3;
  color: var(--ink);
  margin: 0.5rem 0 0.85rem;
}

.page-about .about-compare-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-compare-col {
  padding: clamp(1.5rem, 5vw, 2.5rem);
}

.page-about .about-compare-col h3 {
  font-size: clamp(1.15rem, 3.2vw, 1.5rem);
  line-height: 1.4;
  margin-bottom: 0.85rem;
}

.page-about .about-compare-col p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.9;
}

.page-about .about-compare-col--ink {
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-compare-col--ink h3 {
  color: var(--copper-soft);
}

.page-about .about-compare-col--ink p {
  color: var(--about-ink-soft);
}

.page-about .about-compare-col--sand {
  background: var(--paper);
  color: var(--text);
}

.page-about .about-compare-col--sand h3 {
  color: var(--crimson);
}

/* ---------- 步骤路径 ---------- */

.page-about .about-steps-wrap {
  padding-block: clamp(2.5rem, 7vw, 5rem);
}

.page-about .about-steps-wrap .section-head h2 {
  font-size: clamp(1.5rem, 4.4vw, 2.4rem);
  line-height: 1.3;
  color: var(--ink);
  margin: 0.5rem 0 0;
}

.page-about .about-steps {
  list-style: none;
  margin: clamp(1.5rem, 4vw, 2.5rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-about .about-steps .step {
  display: flex;
  gap: 1rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--rule);
}

.page-about .about-steps .step-index {
  flex: 0 0 auto;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--copper);
  border: 1px solid var(--about-line);
  border-radius: 50%;
}

.page-about .about-steps .step-body {
  min-width: 0;
}

.page-about .about-steps .step-title {
  font-size: 1.0625rem;
  line-height: 1.5;
  color: var(--ink);
  margin-bottom: 0.4rem;
}

.page-about .about-steps .step-text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-figure--last {
  margin-top: clamp(2rem, 5vw, 3rem);
  border: 1px solid var(--about-line);
}

/* ---------- 结尾引导 ---------- */

.page-about .about-cta {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  background: var(--ink-2);
  color: var(--paper);
  border-radius: var(--radius);
  padding: clamp(1.5rem, 5vw, 2.75rem);
  margin-top: clamp(0.5rem, 3vw, 1.5rem);
}

.page-about .about-cta h2 {
  font-size: clamp(1.35rem, 4vw, 2rem);
  line-height: 1.35;
  color: var(--paper);
  margin-bottom: 0.5rem;
}

.page-about .about-cta p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about .about-tail {
  margin: 1.5rem 0 0;
  font-size: 0.875rem;
  line-height: 1.9;
  color: var(--muted);
}

.page-about .about-tail a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--copper);
}

.page-about .about-tail a:hover,
.page-about .about-tail a:focus-visible {
  color: var(--crimson);
  border-bottom-color: var(--crimson);
}

/* ---------- 断点 ---------- */

@media (min-width: 760px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    align-items: end;
  }

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

  .page-about .about-marks {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 2.25rem;
  }

  .page-about .about-mark {
    border-top: 1px solid var(--about-line-soft);
    padding: 1.75rem 0 0;
  }

  .page-about .about-mark:first-child {
    padding-top: 1.75rem;
  }

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

  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 2.5rem;
  }

  .page-about .about-cta {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .page-about .about-cta-text {
    max-width: 32em;
  }
}

@media (min-width: 1024px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .about-aside {
    position: sticky;
    top: 6rem;
  }

  .page-about .about-hero {
    gap: 4rem;
  }
}
<<<PAGE_CSS_END>>>