.page-about {
  --ov-rail-w: 214px;
  --ov-hair: 1px solid var(--line-dark);
  --ov-hair-soft: 1px solid var(--line-light);
  background: var(--cream);
  color: var(--stone);
}

/* ---------- 首屏主题声明 ---------- */
.page-about .ov-hero {
  padding: clamp(26px, 5vw, 52px) 0 clamp(30px, 4vw, 50px);
  border-bottom: var(--ov-hair);
}

.page-about .ov-kicker {
  color: var(--moss);
  margin: 0;
}

.page-about .ov-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 5.4vw, 3.9rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--navy);
  max-width: 19ch;
  margin: 14px 0 0;
}

.page-about .ov-lede {
  max-width: 62ch;
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  font-size: clamp(1rem, 1.35vw, 1.115rem);
  line-height: 1.8;
  color: var(--stone);
}

.page-about .ov-stats {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-dark);
  border: var(--ov-hair);
}

.page-about .ov-stat {
  background: var(--cream);
  padding: 16px 18px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .ov-stat-num {
  font-size: clamp(1.5rem, 3.4vw, 2.05rem);
  line-height: 1;
  color: var(--navy);
}

.page-about .ov-stat-label {
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--moss);
}

/* ---------- 主体两栏 ---------- */
.page-about .ov-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  padding-top: clamp(28px, 4vw, 48px);
}

.page-about .ov-rail-inner {
  display: block;
}

.page-about .ov-rail-box {
  border: var(--ov-hair);
  background: var(--cream);
  padding: 12px 14px;
}

.page-about .ov-rail-summary {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--navy);
  cursor: pointer;
  list-style: none;
}

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

.page-about .ov-rail-summary::before {
  content: "[ + ]";
  margin-right: 8px;
  color: var(--clay);
}

.page-about .ov-rail-box[open] .ov-rail-summary::before {
  content: "[ − ]";
}

.page-about .ov-rail-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .ov-rail-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px 9px 12px;
  border-left: 3px solid transparent;
  color: var(--stone);
  text-decoration: none;
  font-size: 0.94rem;
  line-height: 1.4;
  transition: color 200ms var(--ease), border-color 200ms var(--ease), background-color 200ms var(--ease);
}

.page-about .ov-rail-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--moss);
}

.page-about .ov-rail-link:hover,
.page-about .ov-rail-link:focus-visible {
  background: var(--shale);
  color: var(--navy);
}

.page-about .ov-rail-link.is-active {
  border-left-color: var(--clay);
  color: var(--navy);
  font-weight: 700;
}

.page-about .ov-rail-link.is-active .ov-rail-num {
  color: var(--clay);
}

.page-about .ov-rail-note {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--moss);
}

/* ---------- 章节 ---------- */
.page-about .ov-body {
  min-width: 0;
}

.page-about .ov-section {
  padding: clamp(34px, 5.5vw, 68px) 0;
  border-bottom: var(--ov-hair-soft);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .ov-section:first-child {
  padding-top: clamp(22px, 3vw, 34px);
}

.page-about .ov-section:last-of-type {
  border-bottom: 0;
}

.page-about .ov-h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.32rem, 2.7vw, 1.95rem);
  line-height: 1.25;
  color: var(--navy);
  margin: 10px 0 0;
  max-width: 26ch;
}

.page-about .ov-claim {
  margin: 14px 0 0;
  max-width: 48ch;
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  font-weight: 700;
  line-height: 1.7;
  color: var(--clay);
}

.page-about .ov-text {
  max-width: 66ch;
  margin: 18px 0 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--stone);
}

.page-about .ov-inline-link {
  color: var(--navy);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
}

.page-about .ov-inline-link:hover,
.page-about .ov-inline-link:focus-visible {
  color: var(--clay);
  border-bottom-color: var(--clay);
}

/* ---------- 图文并排 ---------- */
.page-about .ov-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  margin-top: 8px;
  align-items: start;
}

/* ---------- 图片 ---------- */
.page-about .ov-figure {
  margin: 24px 0 0;
}

.page-about .ov-split .ov-figure {
  margin-top: 0;
}

.page-about .ov-figure--wide {
  margin-top: 28px;
}

.page-about .ov-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: var(--ov-hair);
  background: var(--navy);
}

.page-about .ov-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--moss);
}

/* ---------- 版本刻度轴 ---------- */
.page-about .ov-axis-scroll {
  overflow-x: auto;
  margin-top: 26px;
  border: var(--ov-hair);
  background: var(--cream);
  padding: 6px 4px 0;
}

.page-about .ov-axis {
  margin: 0;
}

.page-about .ov-axis svg {
  display: block;
  width: 100%;
  min-width: 540px;
  height: auto;
}

.page-about .ov-axis-line {
  stroke: var(--line);
  stroke-width: 2;
}

.page-about .ov-axis-tick {
  stroke: var(--line);
  stroke-width: 1;
}

.page-about .ov-axis-dot {
  fill: var(--clay);
}

.page-about .ov-axis-dot--start {
  fill: var(--navy);
}

.page-about .ov-axis-label {
  font-family: var(--font-mono);
  font-size: 14px;
  fill: var(--stone);
}

.page-about .ov-axis figcaption {
  margin: 4px 8px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--moss);
}

/* ---------- 对照表 ---------- */
.page-about .ov-table-wrap {
  margin-top: 26px;
  overflow-x: auto;
  border: var(--ov-hair);
  background: var(--cream);
}

.page-about .ov-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 0.94rem;
}

.page-about .ov-table-caption {
  caption-side: top;
  text-align: left;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--moss);
  border-bottom: var(--ov-hair-soft);
}

.page-about .ov-table thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--navy);
  color: var(--cream);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  text-align: left;
  padding: 12px 16px;
  white-space: nowrap;
}

.page-about .ov-table tbody th,
.page-about .ov-table tbody td {
  padding: 14px 16px;
  border-top: var(--ov-hair-soft);
  text-align: left;
  vertical-align: top;
  line-height: 1.7;
  color: var(--stone);
  font-weight: 400;
}

.page-about .ov-table tbody th {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--navy);
  white-space: nowrap;
}

.page-about .ov-table tbody tr:nth-child(even) {
  background: var(--shale);
}

/* ---------- 校对三步 ---------- */
.page-about .ov-steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-dark);
  border: var(--ov-hair);
}

.page-about .ov-step {
  background: var(--navy);
  padding: 20px 20px 22px;
}

.page-about .ov-step-num {
  font-family: var(--font-mono);
  font-size: 20px;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-about .ov-step-title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .ov-step-text {
  margin: 10px 0 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--ice);
}

/* ---------- 团队分工 ---------- */
.page-about .ov-team {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .ov-team-row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr) 44px;
  align-items: center;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: var(--ov-hair-soft);
}

.page-about .ov-team-name {
  font-size: 0.94rem;
  font-weight: 700;
  color: var(--navy);
}

.page-about .ov-team-bar {
  display: block;
  position: relative;
  height: 10px;
  background: var(--shale);
  border: 1px solid var(--line-light);
}

.page-about .ov-team-bar i {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  display: block;
  background: var(--navy);
}

.page-about .ov-team-count {
  font-size: 1rem;
  color: var(--clay);
  text-align: right;
}

.page-about .ov-team-desc {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 覆盖与边界 ---------- */
.page-about .ov-scope {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  margin-top: 26px;
}

.page-about .ov-scope-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.4;
  color: var(--navy);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--moss);
}

.page-about .ov-scope-col--out .ov-scope-title {
  border-bottom-color: var(--clay);
  color: var(--clay);
}

.page-about .ov-scope-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .ov-scope-list li {
  position: relative;
  padding-left: 18px;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--stone);
}

.page-about .ov-scope-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--moss);
}

.page-about .ov-scope-col--out .ov-scope-list li::before {
  background: var(--clay);
}

/* ---------- 引用式说明块 ---------- */
.page-about .ov-quote {
  margin: clamp(34px, 5vw, 64px) 0 clamp(44px, 6vw, 84px);
  padding: 22px 22px 24px;
  background: var(--cream);
  border: var(--ov-hair);
  border-left: 3px solid var(--navy);
}

.page-about .ov-quote p {
  margin: 0;
  max-width: 64ch;
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  line-height: 1.85;
  color: var(--navy);
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 620px) {
  .page-about .ov-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 760px) {
  .page-about .ov-split {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  }

  .page-about .ov-team-row {
    grid-template-columns: 96px minmax(0, 1fr) 52px;
    gap: 16px;
  }

  .page-about .ov-team-desc {
    grid-column: 2 / 4;
    margin-top: -6px;
  }
}

@media (min-width: 960px) {
  .page-about .ov-layout {
    grid-template-columns: var(--ov-rail-w) minmax(0, 1fr);
    gap: 0;
  }

  .page-about .ov-rail {
    border-right: var(--ov-hair);
    padding-right: clamp(16px, 2vw, 30px);
  }

  .page-about .ov-rail-inner {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }

  .page-about .ov-rail-box {
    border: 0;
    background: transparent;
    padding: 0;
  }

  .page-about .ov-rail-summary {
    display: none;
  }

  .page-about .ov-rail-list {
    margin-top: 0;
  }

  .page-about .ov-body {
    padding-left: clamp(28px, 3.4vw, 60px);
  }

  .page-about .ov-hero {
    padding-bottom: clamp(34px, 4vw, 54px);
  }
}

@media (min-width: 1180px) {
  .page-about .ov-split .ov-figure {
    margin-top: 30px;
  }
}
<<<END>>>