.page-about {
  --about-paper-text: #33404C;
  --about-paper-line: #D8CFBA;
  --about-paper-muted: #5F6F72;
  --about-paper-gold: #8A6B1F;
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4vw, 46px) 0 clamp(40px, 6vw, 78px);
  background:
    radial-gradient(120% 90% at 8% 0%, rgba(200, 160, 60, 0.10), transparent 58%),
    var(--ink);
  border-bottom: 1px solid var(--line);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px solid rgba(200, 160, 60, 0.22);
  pointer-events: none;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 7px;
  background: repeating-linear-gradient(90deg, rgba(200, 160, 60, 0.5) 0 1px, transparent 1px 30px);
  opacity: 0.55;
  pointer-events: none;
}
.page-about .about-hero > .wrap {
  position: relative;
  z-index: 1;
}
.page-about .hero-grid {
  display: grid;
  gap: clamp(24px, 3vw, 40px);
  margin-top: clamp(26px, 4vw, 48px);
}
.page-about h1 {
  margin: 14px 0 0;
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(30px, 4.4vw, 56px);
  line-height: 1.24;
  letter-spacing: 0.06em;
  color: var(--paper);
  max-width: 15em;
}
.page-about .hero-main .lead {
  margin-top: 20px;
  max-width: 34em;
  color: var(--body);
  font-size: 16.5px;
  line-height: 1.9;
}
.page-about .hero-side {
  border-left: 1px solid var(--line);
  padding-left: 18px;
}
.page-about .hero-side-label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}
.page-about .hero-side-text {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--celadon);
}
.page-about .hero-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(30px, 4vw, 52px);
  background: var(--line);
  border: 1px solid var(--line);
}
.page-about .figure-cell {
  background: var(--ink-2);
  padding: 14px 16px 16px;
}
.page-about .figure-cell b {
  display: block;
  font-family: var(--mono);
  font-size: clamp(22px, 2.6vw, 32px);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--gold);
}
.page-about .figure-cell span {
  display: block;
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--celadon);
}

/* ---------- 文档双栏 ---------- */
.page-about .doc {
  display: grid;
  gap: clamp(30px, 4vw, 54px);
  padding: clamp(34px, 5vw, 62px) 0 clamp(20px, 3vw, 34px);
}
.page-about .doc--tail {
  padding-top: clamp(20px, 3vw, 34px);
}
.page-about .doc-main {
  min-width: 0;
}
.page-about .doc-aside {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
}
.page-about .aside-kicker {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--gold);
}
.page-about .toc {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.page-about .toc li {
  border-bottom: 1px solid var(--line);
}
.page-about .toc a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 10px 2px;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--body);
  text-decoration: none;
  transition: color var(--ease);
}
.page-about .toc a .mono {
  font-size: 11.5px;
  color: var(--celadon);
  letter-spacing: 0.1em;
}
.page-about .toc a:hover {
  color: var(--gold-soft);
}
.page-about .toc a[aria-current="true"] {
  color: var(--gold);
}
.page-about .toc a[aria-current="true"] .mono {
  color: var(--gold);
}
.page-about .aside-note {
  margin: 0;
  padding-left: 12px;
  border-left: 1px solid var(--line);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--celadon);
}

/* ---------- 章节 ---------- */
.page-about .chapter {
  padding-top: clamp(26px, 3.4vw, 44px);
  margin-top: clamp(28px, 3.6vw, 46px);
  border-top: 1px solid var(--line);
}
.page-about .doc-main > .chapter:first-child,
.page-about .about-paper .chapter-head {
  margin-top: 0;
}
.page-about .doc-main > .chapter:first-child {
  padding-top: 0;
  border-top: 0;
}
.page-about .chapter-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 16px;
  margin-bottom: 18px;
}
.page-about .chapter-num {
  font-family: var(--mono);
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1;
  color: var(--gold);
  letter-spacing: 0.04em;
}
.page-about .chapter-title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.4;
  letter-spacing: 0.05em;
  color: var(--paper);
  max-width: 20em;
}
.page-about .doc-text p {
  margin: 0 0 1.05em;
  max-width: 38em;
  font-size: 16.5px;
  line-height: 1.92;
  color: var(--body);
}
.page-about .doc-text p:last-child {
  margin-bottom: 0;
}
.page-about .doc-text strong {
  color: var(--paper);
  font-weight: 600;
}
.page-about .inline-link {
  color: var(--gold-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 160, 60, 0.45);
  transition: color var(--ease), border-color var(--ease);
}
.page-about .inline-link:hover {
  color: var(--gold);
  border-color: var(--gold);
}
.page-about .chapter .aside-note {
  margin-top: 20px;
}

/* ---------- 条目的五项信息 ---------- */
.page-about .field-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 24px 0 0;
  padding: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.page-about .field-list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 14px;
  background: var(--ink-2);
  font-size: 14.5px;
  color: var(--paper);
  letter-spacing: 0.04em;
}
.page-about .field-list .mono {
  font-size: 11.5px;
  color: var(--gold);
  letter-spacing: 0.1em;
}

/* ---------- 图片 ---------- */
.page-about .figure {
  margin: 26px 0 0;
  border: 1px solid var(--line);
  background: var(--ink-3);
}
.page-about .figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--celadon);
}
.page-about .figure--side {
  max-width: 420px;
  margin-left: auto;
}

/* ---------- 索引分区 ---------- */
.page-about .partition-grid {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 26px 0 0;
  padding: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.page-about .partition {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 15px;
  background: var(--ink-2);
}
.page-about .partition-name {
  font-size: 14.5px;
  color: var(--paper);
  letter-spacing: 0.04em;
}
.page-about .partition .mono {
  font-size: 11.5px;
  color: var(--celadon);
  letter-spacing: 0.1em;
}
.page-about .partition.is-focus {
  background: var(--ink-3);
  box-shadow: inset 0 0 0 1px var(--gold);
}
.page-about .partition.is-focus .partition-name,
.page-about .partition.is-focus .mono {
  color: var(--gold-soft);
}

/* ---------- 五步入库流程 ---------- */
.page-about .flow {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 26px 0 0;
  padding: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  counter-reset: flow;
}
.page-about .flow-step {
  background: var(--ink-2);
  padding: 20px 16px 18px;
}
.page-about .flow-step .mono {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
}
.page-about .flow-step h3 {
  margin: 8px 0 8px;
  font-family: var(--serif);
  font-weight: 900;
  font-size: 18px;
  letter-spacing: 0.08em;
  color: var(--paper);
}
.page-about .flow-step p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--celadon);
}
.page-about .flow-owner {
  display: block;
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gold-soft);
}
.page-about .flow-step--review {
  background: var(--ink-3);
  box-shadow: inset 0 2px 0 var(--cinnabar);
}

/* ---------- 暖白纸区段 ---------- */
.page-about .about-paper {
  background: var(--paper);
  color: var(--about-paper-text);
  border-top: 1px solid var(--gold);
  border-bottom: 1px solid var(--line);
  padding: clamp(38px, 5.5vw, 76px) 0;
}
.page-about .about-paper .chapter-num {
  color: var(--about-paper-gold);
}
.page-about .about-paper .chapter-title {
  color: #16283A;
}
.page-about .about-paper .doc-text--paper p {
  margin: 0 0 1.05em;
  max-width: 38em;
  font-size: 16.5px;
  line-height: 1.92;
  color: var(--about-paper-text);
}
.page-about .cadence {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--about-paper-line);
  max-width: 62em;
}
.page-about .cadence li {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-paper-line);
}
.page-about .cadence .mono {
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--about-paper-gold);
}
.page-about .cadence p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--about-paper-text);
}

/* ---------- 表格 ---------- */
.page-about .team-table-wrap {
  margin-top: 30px;
  overflow-x: auto;
}
.page-about .table-scroll {
  margin-top: 26px;
  overflow-x: auto;
}
.page-about .spec-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
}
.page-about .table-caption {
  caption-side: top;
  text-align: left;
  padding: 0 0 10px;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--about-paper-muted);
}
.page-about .spec-table th {
  padding: 11px 14px;
  text-align: left;
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.1em;
  background: var(--ink-3);
  color: var(--gold-soft);
  border-bottom: 1px solid var(--line);
}
.page-about .spec-table td {
  padding: 12px 14px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--body);
  border-bottom: 1px solid var(--line);
}
.page-about .spec-table td:first-child {
  color: var(--paper);
  white-space: nowrap;
}
.page-about .about-paper .spec-table th {
  background: #E7DFCB;
  color: #5C4A18;
  border-bottom: 1px solid var(--about-paper-line);
}
.page-about .about-paper .spec-table td {
  color: var(--about-paper-text);
  border-bottom-color: var(--about-paper-line);
}
.page-about .about-paper .spec-table td:first-child {
  color: #16283A;
}

/* ---------- 收尾导航 ---------- */
.page-about .closing {
  background: var(--ink-2);
  border-top: 1px solid var(--line);
  padding: clamp(38px, 5vw, 72px) 0;
}
.page-about .closing-title {
  margin: 14px 0 0;
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(22px, 2.8vw, 32px);
  letter-spacing: 0.06em;
  color: var(--paper);
}
.page-about .next-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.page-about .next-list li {
  border-bottom: 1px solid var(--line);
}
.page-about .next-list a {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  align-items: baseline;
  justify-content: space-between;
  padding: 18px 4px;
  text-decoration: none;
  transition: color var(--ease);
}
.page-about .next-title {
  font-size: 16px;
  letter-spacing: 0.04em;
  color: var(--paper);
  transition: color var(--ease);
}
.page-about .next-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--celadon);
  max-width: 34em;
}
.page-about .next-list a:hover .next-title,
.page-about .next-list a:focus-visible .next-title {
  color: var(--gold);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .hero-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .field-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
  .page-about .partition-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .cadence li {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
    align-items: end;
  }
  .page-about .field-list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .doc {
    grid-template-columns: minmax(0, 1fr) 268px;
    align-items: start;
  }
  .page-about .doc-aside {
    position: sticky;
    top: 96px;
    align-self: start;
  }
  .page-about .partition-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1200px) {
  .page-about .doc {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 64px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .toc a,
  .page-about .inline-link,
  .page-about .next-title {
    transition: none;
  }
}
<<<END>>>