.page-about {
  --about-ink: #1b1526;
  --about-ink-soft: #4d4257;
  --about-paper-edge: rgba(27, 21, 38, 0.16);
  --about-shadow-warm: 0 30px 60px -40px rgba(0, 0, 0, 0.95);
  background: var(--void);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + 2rem) 0 2.75rem;
  overflow: hidden;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.36;
  filter: saturate(0.8) contrast(1.05);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(7, 7, 12, 0.55) 0%, rgba(7, 7, 12, 0.9) 58%, var(--void) 100%),
    radial-gradient(120% 80% at 82% 8%, rgba(255, 107, 44, 0.16), transparent 62%);
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
}

.page-about .about-crumb {
  margin-bottom: 1.6rem;
}

.page-about .about-crumb .breadcrumb {
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--ash);
}

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

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

.page-about .about-h1 {
  margin: 0.6rem 0 0;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 800;
  font-size: clamp(2.35rem, 8.6vw, 5.2rem);
  line-height: 0.98;
  letter-spacing: -0.025em;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .about-lede {
  margin-top: 1.15rem;
  max-width: 46em;
  font-size: clamp(0.98rem, 2.5vw, 1.08rem);
  line-height: 1.85;
  color: rgba(243, 233, 215, 0.82);
}

.page-about .about-hero-meta {
  list-style: none;
  margin: 2.2rem 0 0;
  padding: 1.15rem 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.1rem 0.9rem;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-meta-num {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(1.45rem, 5.4vw, 2.05rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-meta-label {
  display: block;
  margin-top: 0.45rem;
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--ash);
}

/* ---------- 长卷主体 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
  padding-top: 2.25rem;
  padding-bottom: 4rem;
}

.page-about .about-rail-head {
  margin: 0 0 0.7rem;
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ash);
}

.page-about .about-rail-list {
  list-style: none;
  display: flex;
  gap: 0.45rem;
  margin: 0;
  padding: 0 0 0.6rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail-link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  padding: 0.42rem 0.7rem;
  border: 1px solid var(--line-soft);
  background: rgba(26, 14, 46, 0.55);
  color: var(--ash);
  font-size: 0.82rem;
  text-decoration: none;
  white-space: nowrap;
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-about .about-rail-idx {
  font-family: var(--font-data);
  font-size: 0.68rem;
  color: var(--orange);
}

.page-about .about-rail-link:hover,
.page-about .about-rail-link:focus-visible {
  color: var(--paper);
  border-color: var(--line-cyan);
  background: rgba(38, 247, 227, 0.08);
  outline: none;
}

.page-about .about-rail-link:focus-visible {
  box-shadow: 0 0 0 2px var(--pink);
}

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

.page-about .about-rail-link[aria-current="true"] .about-rail-idx {
  color: rgba(7, 7, 12, 0.7);
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding: 2.4rem 0 2.8rem;
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: calc(var(--header-h) + 1rem);
}

.page-about .about-chapter:first-child {
  border-top: 0;
  padding-top: 0.4rem;
}

.page-about .about-chapter-head {
  position: relative;
  margin-bottom: 1.5rem;
  padding-left: 0.9rem;
  border-left: 3px solid var(--cyan);
}

.page-about .about-chapter--final .about-chapter-head {
  border-left-color: var(--orange);
}

.page-about .about-chapter-num {
  display: block;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 800;
  font-size: clamp(2.6rem, 13vw, 5rem);
  line-height: 0.82;
  letter-spacing: -0.05em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(243, 233, 215, 0.28);
}

.page-about .about-chapter-kicker {
  margin: 0.55rem 0 0.35rem;
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .about-h2 {
  margin: 0;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 800;
  font-size: clamp(1.5rem, 5.6vw, 2.5rem);
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .about-chapter-lede {
  margin: 0 0 1.6rem;
  max-width: 52em;
  font-size: 0.98rem;
  line-height: 1.85;
  color: rgba(243, 233, 215, 0.78);
}

.page-about .about-chapter-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.4rem;
  align-items: start;
}

/* ---------- 纸感叙事卡 ---------- */
.page-about .about-paper {
  background: linear-gradient(160deg, #f7efe0 0%, var(--paper) 62%, #e9dcc6 100%);
  color: var(--about-ink);
  padding: 1.35rem 1.2rem;
  border: 1px solid var(--about-paper-edge);
  border-radius: var(--r-md);
  box-shadow: var(--about-shadow-warm);
  position: relative;
  transition: transform 220ms var(--ease), box-shadow 220ms var(--ease);
}

.page-about .about-paper::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.9rem;
  bottom: 0.9rem;
  width: 2px;
  background: var(--cyan);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 240ms var(--ease);
}

.page-about .about-paper:hover {
  transform: translateY(-3px);
  box-shadow: 0 34px 62px -36px rgba(0, 0, 0, 0.98);
}

.page-about .about-paper:hover::before {
  transform: scaleY(1);
}

.page-about .about-paper--warm::before {
  background: var(--orange);
}

.page-about .about-paper p {
  margin: 0 0 0.85rem;
  font-size: 0.95rem;
  line-height: 1.88;
  color: var(--about-ink-soft);
}

.page-about .about-paper p:first-child {
  color: var(--about-ink);
}

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

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

.page-about .about-figure img {
  display: block;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  object-fit: cover;
  aspect-ratio: 10 / 7;
}

.page-about .about-figure figcaption {
  margin-top: 0.6rem;
  font-family: var(--font-data);
  font-size: 0.7rem;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--ash);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.4rem;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(38, 247, 227, 0.35) 40%, var(--line-soft) 100%);
}

.page-about .about-timeline-item {
  position: relative;
  padding-bottom: 1rem;
}

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: -1.4rem;
  top: 1.35rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--void);
  border: 1px solid var(--cyan);
  box-shadow: 0 0 0 3px rgba(38, 247, 227, 0.14);
}

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

.page-about .about-version {
  background: rgba(26, 14, 46, 0.5);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 1.05rem 1.1rem;
  position: relative;
  transition: transform 200ms var(--ease), border-color 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-about .about-version::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85rem;
  bottom: 0.85rem;
  width: 2px;
  background: var(--orange);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 220ms var(--ease);
}

.page-about .about-version:hover {
  transform: translateY(-2px);
  border-color: var(--line-cyan);
  box-shadow: var(--shadow-cyan);
}

.page-about .about-version:hover::after {
  transform: scaleY(1);
}

.page-about .about-version--current {
  border-color: rgba(255, 107, 44, 0.5);
  background: linear-gradient(150deg, rgba(255, 107, 44, 0.12), rgba(26, 14, 46, 0.6) 58%);
}

.page-about .about-year {
  margin: 0 0 0.35rem;
  font-family: var(--font-data);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-version--current .about-year {
  color: var(--orange);
}

.page-about .about-version-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 800;
  font-size: 1.16rem;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-version p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(243, 233, 215, 0.76);
}

.page-about .about-version .about-year {
  margin-bottom: 0.4rem;
}

/* ---------- 文本链接 ---------- */
.page-about .about-textlink {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
  padding-bottom: 1px;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-about .about-textlink:hover,
.page-about .about-textlink:focus-visible {
  color: var(--pink);
  border-bottom-color: var(--pink);
  outline: none;
}

.page-about .about-inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.4rem;
  margin-top: 1.5rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line-soft);
  font-size: 0.9rem;
}

/* ---------- 数据关卡 ---------- */
.page-about .about-gates {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
}

.page-about .about-gate {
  border: 1px solid var(--line);
  border-left: 2px solid var(--orange);
  border-radius: var(--r-sm);
  background: rgba(12, 79, 85, 0.16);
  padding: 1.05rem 1.05rem 1.15rem;
}

.page-about .about-gate-idx {
  margin: 0 0 0.35rem;
  font-family: var(--font-data);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--warn);
}

.page-about .about-gate-title {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--paper);
}

.page-about .about-gate p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.82;
  color: rgba(243, 233, 215, 0.75);
}

.page-about .about-gate .about-gate-idx {
  margin-bottom: 0.35rem;
}

.page-about .about-stats {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-stats li {
  background: var(--void);
  padding: 1rem 0.9rem 1.15rem;
}

.page-about .about-stat-num {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(1.35rem, 5.4vw, 1.95rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat-unit {
  display: inline-block;
  margin-left: 0.3rem;
  font-family: var(--font-data);
  font-size: 0.72rem;
  color: var(--ash);
}

.page-about .about-stat-label {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.78rem;
  line-height: 1.6;
  color: rgba(243, 233, 215, 0.62);
}

.page-about .about-aside {
  margin: 1.5rem 0 0;
  padding: 0.9rem 1rem;
  border: 1px dashed var(--line-strong);
  border-radius: var(--r-sm);
  font-size: 0.88rem;
  line-height: 1.8;
  color: rgba(243, 233, 215, 0.78);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partner-panel {
  border: 1px solid var(--line-cyan);
  border-radius: var(--r-md);
  background: linear-gradient(170deg, rgba(38, 247, 227, 0.08), rgba(26, 14, 46, 0.7) 60%);
  padding: 1.15rem 1.1rem 1.25rem;
}

.page-about .about-partner-k {
  margin: 0 0 0.9rem;
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-partner-list li {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.7rem 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-partner-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-partner-num {
  font-family: var(--font-data);
  font-size: 1.4rem;
  line-height: 1;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

.page-about .about-partner-txt {
  font-size: 0.86rem;
  line-height: 1.6;
  color: rgba(243, 233, 215, 0.76);
}

.page-about .about-partner-note {
  margin: 0.9rem 0 0;
  padding-top: 0.85rem;
  border-top: 1px solid var(--line-soft);
  font-size: 0.8rem;
  line-height: 1.75;
  color: var(--ash);
}

/* ---------- 收束 ---------- */
.page-about .about-chapter--final {
  padding-bottom: 1rem;
}

.page-about .about-next-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.8rem;
  margin-top: 0.4rem;
}

.page-about .about-next-card {
  display: block;
  padding: 1.15rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(26, 14, 46, 0.55);
  text-decoration: none;
  transition: border-color 200ms var(--ease), transform 200ms var(--ease), background 200ms var(--ease);
}

.page-about .about-next-card:hover,
.page-about .about-next-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--pink);
  background: rgba(255, 61, 154, 0.09);
  outline: none;
}

.page-about .about-next-k {
  display: block;
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .about-next-t {
  display: block;
  margin: 0.5rem 0 0.7rem;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--paper);
}

.page-about .about-next-a {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
  border-bottom: 1px solid var(--line-cyan);
}

.page-about .about-next-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.6rem;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero-meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
  }

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

  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-paper {
    padding: 1.6rem 1.5rem;
  }
}

@media (min-width: 820px) {
  .page-about .about-chapter-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 1.8rem;
  }

  .page-about .about-chapter-grid--flip {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
  }

  .page-about .about-figure img {
    aspect-ratio: 10 / 7.4;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding-top: calc(var(--header-h) + 3.5rem);
    padding-bottom: 3.6rem;
  }

  .page-about .about-body {
    grid-template-columns: 156px minmax(0, 1fr);
    gap: 3.5rem;
    padding-top: 3rem;
    padding-bottom: 5.5rem;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 1.6rem);
    align-self: start;
  }

  .page-about .about-rail-head {
    padding-bottom: 0.6rem;
    border-bottom: 1px solid var(--line-soft);
  }

  .page-about .about-rail-list {
    display: block;
    overflow: visible;
    padding: 0.5rem 0 0;
  }

  .page-about .about-rail-list li {
    margin-bottom: 0.15rem;
  }

  .page-about .about-rail-link {
    display: flex;
    width: 100%;
    padding: 0.5rem 0.6rem;
    border-color: transparent;
    background: transparent;
    border-left: 2px solid transparent;
  }

  .page-about .about-rail-link:hover,
  .page-about .about-rail-link:focus-visible {
    background: rgba(38, 247, 227, 0.07);
    border-color: transparent;
    border-left-color: var(--line-cyan);
  }

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

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

  .page-about .about-chapter {
    padding: 3.2rem 0 3.6rem;
  }

  .page-about .about-chapter-head {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    grid-template-areas:
      "num kicker"
      "num title";
    column-gap: 1.4rem;
    align-items: end;
    padding-left: 1.2rem;
    margin-bottom: 2rem;
  }

  .page-about .about-chapter-num {
    grid-area: num;
    font-size: clamp(3.4rem, 6vw, 5.4rem);
  }

  .page-about .about-chapter-kicker {
    grid-area: kicker;
    margin: 0 0 0.45rem;
  }

  .page-about .about-h2 {
    grid-area: title;
  }

  .page-about .about-paper {
    padding: 1.9rem 1.8rem;
  }

  .page-about .about-paper p {
    font-size: 0.97rem;
  }

  .page-about .about-timeline {
    padding-left: 1.6rem;
  }

  .page-about .about-timeline-item::before {
    left: -1.6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-paper,
  .page-about .about-version,
  .page-about .about-next-card,
  .page-about .about-rail-link {
    transition: none;
  }

  .page-about .about-paper:hover,
  .page-about .about-version:hover,
  .page-about .about-next-card:hover {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>