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

.page-about a {
  color: var(--pine);
  text-decoration-color: var(--line-gold);
  text-underline-offset: 3px;
}

.page-about a:hover {
  color: var(--red);
}

/* ---------- 首屏 ---------- */
.page-about .about-lead {
  background:
    repeating-linear-gradient(90deg, rgba(201, 164, 92, 0.08) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(201, 164, 92, 0.06) 0 1px, transparent 1px 96px),
    linear-gradient(165deg, var(--ink) 0%, var(--cloud) 58%, var(--pine) 100%);
  color: var(--paper);
  border-bottom: 3px solid var(--gold);
}

.page-about .about-lead__inner {
  display: grid;
  gap: 2rem;
  padding: 2rem 0 2.5rem;
}

.page-about .about-lead__kicker {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--gold-soft);
}

.page-about .about-lead h1 {
  margin: 0.75rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4.6vw, 3.15rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-lead__lede {
  margin: 1.25rem 0 0;
  max-width: 48ch;
  font-size: var(--step-2);
  line-height: 1.85;
  color: rgba(237, 241, 238, 0.86);
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0;
  border-top: 2px solid rgba(201, 164, 92, 0.55);
  border-left: 2px solid rgba(201, 164, 92, 0.55);
}

.page-about .about-figures > div {
  padding: 0.85rem 0.75rem 0.95rem;
  border-right: 2px solid rgba(201, 164, 92, 0.55);
  border-bottom: 2px solid rgba(201, 164, 92, 0.55);
}

.page-about .about-figures dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--gold-soft);
}

.page-about .about-figures dd {
  margin: 0.35rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.4vw, 2.25rem);
  line-height: 1;
  color: var(--paper);
}

.page-about .about-figures__unit {
  margin-left: 0.2rem;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--mist);
}

.page-about .about-lead__stamp {
  margin: 1rem 0 0;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

/* ---------- 主体分栏 ---------- */
.page-about .about-body {
  display: grid;
  gap: 2rem;
  padding: 2.25rem 0 3.5rem;
}

/* ---------- 章节索引 ---------- */
.page-about .about-toc {
  border-left: 3px solid var(--gold);
  padding: 0.15rem 0 0.15rem 1rem;
}

.page-about .about-toc__title {
  margin: 0 0 0.65rem;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--pine);
}

.page-about .about-toc ol {
  display: flex;
  gap: 0.6rem;
  margin: 0;
  padding: 0 0 0.35rem;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-toc li {
  flex: 0 0 auto;
}

.page-about .about-toc a {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  padding: 0.35rem 0.55rem;
  border: 1px solid rgba(169, 184, 182, 0.6);
  font-size: var(--step-1);
  white-space: nowrap;
  text-decoration: none;
  color: var(--ink);
}

.page-about .about-toc a:hover {
  border-color: var(--gold);
  color: var(--pine);
}

.page-about .about-toc a .mono {
  font-size: 0.7rem;
  color: var(--gold);
}

.page-about .about-toc a[aria-current="location"] {
  border-color: var(--gold);
  background: var(--pine);
  color: var(--paper);
  font-weight: 700;
}

.page-about .about-toc a[aria-current="location"] .mono {
  color: var(--gold-soft);
}

.page-about .about-toc__note {
  margin: 1rem 0 0;
  font-size: var(--step-0);
  line-height: 1.7;
  color: rgba(14, 42, 36, 0.72);
}

/* ---------- 章节 ---------- */
.page-about .about-sec {
  padding-top: 1.75rem;
  border-top: 2px solid rgba(14, 42, 36, 0.16);
  margin-bottom: 3.25rem;
  scroll-margin-top: 1.5rem;
}

.page-about .about-sec:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-sec__no {
  margin: 0 0 0.5rem;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--red);
}

.page-about .about-sec h2 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: var(--step-4);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-sec h3.about-sub {
  margin: 2rem 0 0;
  font-family: var(--font-display);
  font-size: var(--step-3);
  color: var(--pine);
}

.page-about .about-sec__intro {
  margin: 0 0 1.5rem;
  max-width: 62ch;
  font-size: var(--step-2);
  line-height: 1.8;
  color: rgba(14, 42, 36, 0.82);
}

.page-about .about-sec__foot {
  margin: 1.75rem 0 0;
  padding-top: 0.9rem;
  border-top: 1px dashed rgba(169, 184, 182, 0.9);
  font-size: var(--step-1);
  line-height: 1.75;
  color: rgba(14, 42, 36, 0.78);
}

.page-about .prose p {
  margin: 0 0 1.1rem;
  max-width: 68ch;
  font-size: var(--step-2);
  line-height: 1.85;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 1.5rem 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 3px solid var(--ink);
  box-shadow: var(--shadow-hard-sm);
}

.page-about .about-figure figcaption {
  margin-top: 0.6rem;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: rgba(14, 42, 36, 0.62);
}

/* ---------- 引用块 ---------- */
.page-about .about-quote {
  margin: 1.75rem 0 0;
  padding: 0.25rem 0 0.25rem 1.1rem;
  border-left: 3px solid var(--gold);
  font-size: var(--step-3);
  font-weight: 700;
  line-height: 1.65;
  color: var(--pine);
}

/* ---------- 时间线 ---------- */
.page-about .about-track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 82%;
  gap: 0.9rem;
  overflow-x: auto;
  padding: 0.4rem 0.15rem 1.25rem;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .phase {
  position: relative;
  scroll-snap-align: start;
  padding: 1.1rem 1rem 1.15rem;
  background: #fff;
  border: 3px solid var(--ink);
  border-top-width: 8px;
  border-top-color: var(--gold);
  box-shadow: var(--shadow-hard-sm);
}

.page-about .phase__code {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--red);
}

.page-about .phase h3 {
  margin: 0.4rem 0 0.6rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--ink);
}

.page-about .phase p {
  margin: 0;
  font-size: var(--step-1);
  line-height: 1.75;
  color: rgba(14, 42, 36, 0.8);
}

.page-about .phase__note {
  margin-top: 0.65rem;
  padding-top: 0.6rem;
  border-top: 1px solid rgba(201, 164, 92, 0.55);
  font-size: var(--step-0);
  color: var(--pine);
}

/* ---------- 编号表 ---------- */
.page-about .about-tablewrap {
  overflow-x: auto;
  margin: 1.5rem 0 0;
}

.page-about .about-codes {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  border: 3px solid var(--ink);
  font-size: var(--step-1);
}

.page-about .about-codes thead th {
  background: var(--ink);
  color: var(--gold-soft);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-align: left;
  padding: 0.7rem 0.85rem;
}

.page-about .about-codes td {
  padding: 0.75rem 0.85rem;
  border: 1px solid rgba(14, 42, 36, 0.22);
  vertical-align: top;
  line-height: 1.65;
}

.page-about .about-codes tbody tr:nth-child(even) {
  background: rgba(169, 184, 182, 0.16);
}

.page-about .about-codes td:first-child {
  width: 84px;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--pine);
}

/* ---------- 更新节奏 ---------- */
.page-about .about-cadence {
  display: grid;
  gap: 0.7rem;
  margin: 1.1rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-cadence li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.35rem;
  padding: 0.85rem 1rem;
  background: #fff;
  border-left: 3px solid var(--gold);
  box-shadow: 2px 2px 0 rgba(7, 22, 19, 0.14);
  font-size: var(--step-1);
  line-height: 1.75;
}

.page-about .about-cadence .mono {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--red);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 0.75rem;
  margin: 0 0 1.25rem;
}

.page-about .role {
  padding: 0.95rem 1rem 1rem;
  background: #fff;
  border: 2px solid var(--ink);
}

.page-about .role__n {
  margin: 0;
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-about .role h3 {
  margin: 0.45rem 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--pine);
}

.page-about .role p {
  margin: 0;
  font-size: var(--step-1);
  line-height: 1.7;
  color: rgba(14, 42, 36, 0.8);
}

/* ---------- 地图 ---------- */
.page-about .about-tier-layout {
  display: grid;
  gap: 1.5rem;
}

.page-about .about-tier-text p {
  margin: 0 0 1.1rem;
  max-width: 62ch;
  font-size: var(--step-2);
  line-height: 1.85;
}

.page-about .about-map-wrap {
  border: 2px solid rgba(14, 42, 36, 0.8);
  background: rgba(255, 255, 255, 0.6);
  padding: 0.75rem 0.75rem 0.6rem;
  box-shadow: var(--shadow-hard-sm);
}

.page-about .about-map {
  display: block;
  width: 100%;
  max-width: 420px;
  height: auto;
  margin: 0 auto;
}

.page-about .about-map__outline {
  fill: rgba(23, 69, 60, 0.1);
  stroke: var(--pine);
  stroke-width: 2;
  stroke-linejoin: round;
}

.page-about .about-map__pin circle {
  fill: var(--gold);
  stroke: var(--ink);
  stroke-width: 2;
  cursor: pointer;
  transition: fill 0.18s ease;
}

.page-about .about-map__pin:hover circle,
.page-about .about-map__pin:focus circle {
  fill: var(--red);
}

.page-about .about-map__label {
  font-family: var(--font-body);
  font-size: 11px;
  fill: var(--ink);
  text-anchor: middle;
}

.page-about .about-map__tip {
  font-family: var(--font-mono);
  font-size: 10px;
  fill: var(--red-deep);
  text-anchor: middle;
  opacity: 0;
  transition: opacity 0.18s ease;
}

.page-about .about-map__pin:hover .about-map__tip,
.page-about .about-map__pin:focus .about-map__tip {
  opacity: 1;
}

.page-about .about-map__dot {
  fill: var(--mist);
}

.page-about .about-map__legend {
  margin: 0.5rem 0 0;
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-align: center;
  color: rgba(14, 42, 36, 0.66);
}

/* ---------- 分层卡 ---------- */
.page-about .about-tiers {
  display: grid;
  gap: 0.9rem;
  margin: 1.75rem 0 0;
}

.page-about .tier {
  padding: 1rem 1.05rem 1.1rem;
  background: #fff;
  border: 3px solid var(--ink);
  border-top-width: 8px;
  border-top-color: var(--mist);
  box-shadow: var(--shadow-hard-sm);
}

.page-about .tier--a {
  border-top-color: var(--gold);
}

.page-about .tier--b {
  border-top-color: var(--pine);
}

.page-about .tier--c {
  border-top-color: var(--mist);
}

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

.page-about .tier__price {
  margin: 0.6rem 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--red);
}

.page-about .tier__price span {
  margin-left: 0.25rem;
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 400;
  color: rgba(14, 42, 36, 0.66);
}

.page-about .tier p:last-child {
  margin: 0;
  font-size: var(--step-1);
  line-height: 1.7;
  color: rgba(14, 42, 36, 0.8);
}

/* ---------- 行动条 ---------- */
.page-about .about-cta {
  display: grid;
  gap: 1.25rem;
  padding: 1.5rem 1.25rem;
  background:
    repeating-linear-gradient(90deg, rgba(201, 164, 92, 0.08) 0 1px, transparent 1px 72px),
    linear-gradient(150deg, var(--pine), var(--ink) 80%);
  color: var(--paper);
  border: 3px solid var(--night);
  box-shadow: var(--shadow-hard);
}

.page-about .about-cta h2 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: var(--step-3);
  color: var(--paper);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 46ch;
  font-size: var(--step-1);
  line-height: 1.8;
  color: rgba(237, 241, 238, 0.84);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.page-about .about-cta .btn--ghost {
  color: var(--gold-soft);
  border-color: var(--gold-soft);
}

.page-about .about-cta .btn--ghost:hover {
  background: var(--gold-soft);
  color: var(--ink);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-cadence li {
    grid-template-columns: 8.5rem minmax(0, 1fr);
    align-items: start;
    gap: 0.9rem;
  }

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

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

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 1.75rem 1.75rem;
  }
}

@media (min-width: 860px) {
  .page-about .about-track {
    grid-auto-flow: row;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    grid-auto-columns: auto;
    overflow-x: visible;
    padding: 0.4rem 0 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-lead__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: end;
    gap: 3rem;
    padding: 2.75rem 0 3rem;
  }

  .page-about .about-tier-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
    gap: 2rem;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 3.5rem;
    padding: 3rem 0 4.5rem;
  }

  .page-about .about-toc {
    position: sticky;
    top: 1.5rem;
    align-self: start;
  }

  .page-about .about-toc ol {
    display: block;
    overflow-x: visible;
    padding-bottom: 0;
  }

  .page-about .about-toc li + li {
    margin-top: 0.25rem;
  }

  .page-about .about-toc a {
    display: flex;
    width: 100%;
    border: 0;
    border-left: 2px solid transparent;
    padding: 0.4rem 0 0.4rem 0.6rem;
    white-space: normal;
    line-height: 1.45;
  }

  .page-about .about-toc a[aria-current="location"] {
    background: transparent;
    color: var(--red);
    border-left-color: var(--red);
  }

  .page-about .about-toc a[aria-current="location"] .mono {
    color: var(--red);
  }
}

@media (hover: hover) and (min-width: 860px) {
  .page-about .phase__note {
    max-height: 0;
    margin-top: 0;
    padding-top: 0;
    border-top-color: transparent;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.25s ease, opacity 0.25s ease, margin-top 0.25s ease;
  }

  .page-about .phase:hover .phase__note,
  .page-about .phase:focus .phase__note,
  .page-about .phase:focus-within .phase__note {
    max-height: 9rem;
    margin-top: 0.65rem;
    padding-top: 0.6rem;
    border-top-color: rgba(201, 164, 92, 0.55);
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-map__pin circle,
  .page-about .about-map__tip,
  .page-about .phase__note {
    transition: none;
  }
}
<<<END>>>