.page-about {
  --about-rail-w: 208px;
  --about-rail-gap: 56px;
  background: var(--ink);
  color: var(--text);
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 48px) 0 44px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -45%;
  left: -18%;
  width: 136%;
  height: 160%;
  background: linear-gradient(112deg, var(--panel) 0%, var(--panel) 51%, var(--panel-up) 51.2%, var(--panel-up) 100%);
  transform: rotate(-6deg);
  z-index: 0;
  opacity: .92;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: var(--cyan);
  opacity: .55;
  z-index: 1;
}

.page-about .about-hero > .container {
  position: relative;
  z-index: 2;
}

.page-about .about-hero .eyebrow {
  margin: 18px 0 10px;
  color: var(--orange);
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.95rem, 5.4vw, 3.7rem);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .about-lede {
  max-width: 36em;
  margin: 0;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 2px;
  overflow: hidden;
}

.page-about .about-metrics li {
  background: var(--ink);
  padding: 16px 16px 18px;
}

.page-about .about-metric-num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(1.35rem, 4.6vw, 1.85rem);
  line-height: 1.1;
  color: var(--signal);
}

.page-about .about-metric-label {
  display: block;
  margin-top: 6px;
  font-size: .78rem;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 主体骨架：左侧刻度栏 + 右侧叙事 ---------- */

.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  padding-block: 40px 72px;
}

.page-about .about-rail-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--sage);
}

.page-about .about-rail-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail-list > li {
  flex: 0 0 auto;
}

.page-about .about-rail-link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: .8rem;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-rail-link span {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: .72rem;
  color: var(--orange);
}

.page-about .about-rail-link:hover {
  color: var(--text);
  border-color: var(--cyan);
}

.page-about .about-rail-link[aria-current="true"] {
  color: var(--text);
  border-color: var(--cyan);
}

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

/* ---------- 章节 ---------- */

.page-about .about-sec {
  margin-bottom: 60px;
}

.page-about .about-sec:last-child {
  margin-bottom: 0;
}

.page-about .about-sec-head {
  position: relative;
  padding-left: 46px;
  margin-bottom: 22px;
}

.page-about .about-index {
  position: absolute;
  left: 0;
  top: -0.24em;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 2.4rem;
  line-height: 1;
  color: var(--orange);
  opacity: .9;
}

.page-about .about-sec-head h2 {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(1.25rem, 3.4vw, 1.7rem);
  line-height: 1.35;
  letter-spacing: -0.005em;
  color: var(--text);
}

.page-about .about-body .prose p {
  margin: 0 0 16px;
  font-size: .96rem;
  line-height: 1.82;
  color: var(--muted);
}

.page-about .about-body .prose p:last-child {
  margin-bottom: 0;
}

.page-about .about-body .prose strong {
  color: var(--text);
  font-weight: 700;
}

.page-about .about-body a.link-more {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 240, 196, .35);
}

.page-about .about-body a.link-more:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 图文分栏 ---------- */

.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .about-split-main {
  min-width: 0;
}

.page-about .about-figure {
  margin: 26px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 4px;
  object-fit: cover;
  background: var(--panel);
}

.page-about .about-figure .figure-caption {
  margin-top: 10px;
  font-size: .78rem;
  line-height: 1.6;
  color: var(--sage);
}

/* ---------- 无间距细框分工表 ---------- */

.page-about .about-cells {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  border-radius: 2px;
  overflow: hidden;
}

.page-about .about-cell {
  background: var(--panel);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 18px 18px 16px;
  transition: background .24s var(--ease);
}

.page-about .about-cell:hover {
  background: var(--panel-up);
}

.page-about .about-cell-title {
  margin: 0 0 8px;
  font-size: .95rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-cell-text {
  margin: 0;
  font-size: .84rem;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .about-cell-scope {
  display: block;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .05em;
  color: var(--sage);
  transition: color .24s var(--ease);
}

.page-about .about-cell:hover .about-cell-scope {
  color: var(--cyan);
}

/* ---------- 三段出稿节奏 ---------- */

.page-about .about-phases {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-phase {
  position: relative;
  padding: 18px 18px 18px 20px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--orange);
  border-radius: 2px;
  background: var(--panel);
}

.page-about .about-phase-time {
  display: inline-block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: .8rem;
  letter-spacing: .08em;
  color: var(--signal);
}

.page-about .about-phase h3 {
  margin: 8px 0 8px;
  font-size: .95rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-phase p {
  margin: 0;
  font-size: .84rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 大字停顿 ---------- */

.page-about .about-quote {
  position: relative;
  margin: 0 0 60px;
  padding: 10px 0 10px 22px;
  border-left: 6px solid var(--orange);
}

.page-about .about-quote::before {
  content: "“";
  position: absolute;
  left: 20px;
  top: -0.42em;
  font-family: var(--font-display);
  font-size: 4.2rem;
  line-height: 1;
  color: var(--line);
  z-index: 0;
}

.page-about .about-quote p {
  position: relative;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.4rem, 5vw, 2.4rem);
  line-height: 1.46;
  letter-spacing: -0.01em;
  color: var(--text);
}

/* ---------- 夜场值班 ---------- */

.page-about .about-night {
  position: relative;
  overflow: hidden;
  margin-bottom: 4px;
  padding: 30px 20px 32px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--panel);
}

.page-about .about-night-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .26;
  z-index: 0;
}

.page-about .about-night::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(158deg, rgba(10, 22, 19, .94) 0%, rgba(10, 22, 19, .74) 52%, rgba(16, 36, 30, .92) 100%);
}

.page-about .about-night-body {
  position: relative;
  z-index: 2;
}

.page-about .about-night .about-index {
  color: var(--cyan);
}

/* ---------- 年份时间轴 ---------- */

.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 40px;
  list-style: none;
}

.page-about .about-scale {
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 28px;
}

.page-about .about-tl-item {
  position: relative;
  padding-bottom: 30px;
}

.page-about .about-tl-item:last-child {
  padding-bottom: 0;
}

.page-about .about-tl-year {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(1.7rem, 6vw, 2.6rem);
  line-height: 1;
  color: var(--orange);
  letter-spacing: -0.02em;
}

.page-about .about-tl-title {
  margin: 0 0 8px;
  font-size: .98rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
}

.page-about .about-tl-text {
  margin: 0;
  font-size: .86rem;
  line-height: 1.76;
  color: var(--muted);
}

.page-about .about-more {
  margin: 26px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: .86rem;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 纠错说明 ---------- */

.page-about .about-note {
  padding: 20px 18px 18px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--panel);
}

.page-about .about-note-tag {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .04em;
  color: var(--cyan);
  word-break: break-all;
}

/* ---------- 合作方 ---------- */

.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 24px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 2px;
  overflow: hidden;
}

.page-about .about-partner {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 18px;
  background: var(--ink);
}

.page-about .about-partner-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 1.6rem;
  line-height: 1;
  color: var(--signal);
}

.page-about .about-partner p {
  margin: 0;
  font-size: .86rem;
  color: var(--muted);
}

/* ---------- 收尾 ---------- */

.page-about .about-sec--end .about-cta {
  padding: 26px 20px 26px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--cyan);
  border-radius: 3px;
  background: var(--panel);
}

.page-about .about-cta-body p {
  margin: 0 0 18px;
  font-size: .94rem;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-cta-note {
  margin: 16px 0 0;
  font-size: .78rem;
  color: var(--sage);
}

/* ---------- 断点 ---------- */

@media (min-width: 620px) {
  .page-about .about-cells {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .page-about .about-partner {
    flex-direction: column;
    gap: 8px;
  }

  .page-about .about-metrics {
    margin-top: 34px;
  }
}

@media (min-width: 760px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-hero {
    padding: calc(var(--header-h) + 64px) 0 56px;
  }

  .page-about .about-hero h1 {
    max-width: 16em;
  }

  .page-about .about-lede {
    font-size: 1.05rem;
  }

  .page-about .about-night {
    padding: 44px 40px 46px;
  }

  .page-about .about-note,
  .page-about .about-sec--end .about-cta {
    padding: 30px 30px 28px;
  }

  .page-about .about-sec-head {
    padding-left: 74px;
    margin-bottom: 26px;
  }

  .page-about .about-index {
    font-size: 3.6rem;
    top: -0.2em;
  }
}

@media (min-width: 900px) {
  .page-about .about-shell {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: var(--about-rail-gap);
    align-items: start;
    padding-block: 56px 88px;
  }

  .page-about .about-rail-inner {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-about .about-rail-list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail-list > li {
    display: block;
    margin-bottom: 2px;
  }

  .page-about .about-rail-link {
    display: flex;
    width: 100%;
    padding: 8px 0 8px 14px;
    border: 0;
    border-left: 1px solid var(--line);
    border-radius: 0;
    white-space: normal;
    font-size: .82rem;
    line-height: 1.5;
    transition: color .2s var(--ease), border-color .2s var(--ease), padding-left .2s var(--ease);
  }

  .page-about .about-rail-link:hover,
  .page-about .about-rail-link[aria-current="true"] {
    border-left-color: var(--cyan);
    padding-left: 18px;
    color: var(--text);
  }

  .page-about .about-rail-link[aria-current="true"] span {
    color: var(--cyan);
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .about-figure--side {
    margin-top: 4px;
  }

  .page-about .about-figure--wide {
    margin-left: 12%;
  }

  .page-about .about-sec {
    margin-bottom: 72px;
  }

  .page-about .about-quote {
    margin-bottom: 72px;
    padding-left: 40px;
  }

  .page-about .about-quote p {
    max-width: 22em;
  }

  .page-about .about-timeline {
    padding-left: 56px;
  }

  .page-about .about-sec-head h2 {
    font-size: 1.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-cell,
  .page-about .about-rail-link,
  .page-about .about-cell-scope {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>