.page-about {
  --about-line: rgba(53, 240, 208, 0.18);
  --about-line-soft: rgba(53, 240, 208, 0.1);
  --about-paper-ink: #10222F;
  --about-paper-soft: #23384A;
  --about-paper-accent: #9C4E16;
  background: var(--c-deep);
  color: var(--c-text);
  padding-bottom: clamp(40px, 7vw, 88px);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(18px, 4vw, 38px) 0 clamp(26px, 5vw, 52px);
  background:
    radial-gradient(140% 90% at 10% -12%, rgba(53, 240, 208, 0.16), transparent 62%),
    linear-gradient(180deg, var(--c-ink) 0%, var(--c-deep) 78%);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, var(--about-line-soft) 0 1px, transparent 1px 76px),
    repeating-linear-gradient(0deg, rgba(53, 240, 208, 0.06) 0 1px, transparent 1px 76px);
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
}

.page-about .breadcrumbs {
  position: relative;
  z-index: 1;
  margin-bottom: clamp(16px, 3vw, 26px);
  font-size: 0.78rem;
}

.page-about .breadcrumbs a {
  color: var(--c-cyan);
}

.page-about .hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

.page-about h1 {
  margin: 10px 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 6.4vw, 4.1rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-title);
}

.page-about .lede {
  max-width: 58ch;
  margin: 0;
  font-size: clamp(0.95rem, 2.4vw, 1.06rem);
  line-height: 1.78;
  color: var(--c-text);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(18px, 3.4vw, 28px);
}

.page-about .hero-figure {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--about-line);
  box-shadow: 0 30px 60px -40px rgba(0, 0, 0, 0.9);
}

.page-about .hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .hero-scale {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--about-line);
}

.page-about .hero-scale li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 12px;
  border-left: 2px solid var(--c-cyan);
}

.page-about .hero-scale .num {
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 3.6vw, 1.7rem);
  line-height: 1;
  color: var(--c-cyan-soft);
}

.page-about .scale-label {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--c-mist);
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding: clamp(28px, 5vw, 58px) 0;
}

.page-about h2 {
  margin: 10px 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.45rem, 3.8vw, 2.4rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--c-title);
}

.page-about h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
  line-height: 1.35;
  color: var(--c-title);
}

.page-about p {
  margin: 0 0 14px;
  line-height: 1.78;
  max-width: 64ch;
}

.page-about .section-head {
  margin-bottom: clamp(18px, 3.4vw, 30px);
}

.page-about .section-sub {
  color: var(--c-mist);
  font-size: 0.94rem;
}

.page-about .sheet {
  border-radius: var(--r-lg);
  padding: clamp(20px, 4.5vw, 46px);
  background: var(--c-stand);
  border: 1px solid var(--about-line);
}

.page-about .sheet--paper {
  background: linear-gradient(170deg, var(--c-paper) 0%, #E8D8BD 100%);
  color: var(--about-paper-ink);
  border-color: rgba(7, 26, 44, 0.14);
  box-shadow: 0 34px 70px -46px rgba(0, 0, 0, 0.85);
}

.page-about .sheet--paper h2,
.page-about .sheet--paper h3 {
  color: #08192B;
}

.page-about .sheet--paper p {
  color: var(--about-paper-soft);
}

.page-about .sheet--paper .eyebrow {
  color: var(--about-paper-accent);
}

/* ---------- 品牌起点 ---------- */
.page-about .origin-grid {
  display: grid;
  gap: clamp(20px, 3.6vw, 36px);
  margin-top: 8px;
}

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

.page-about .coord-stack li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 0;
  border-top: 1px solid rgba(7, 26, 44, 0.16);
}

.page-about .coord-stack li:first-child {
  border-top: 2px solid rgba(7, 26, 44, 0.55);
}

.page-about .coord-index {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--about-paper-accent);
  padding-top: 2px;
}

.page-about .coord-stack p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
}

/* ---------- 目录 ---------- */
.page-about .catalog-wrap {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

.page-about .catalog-copy > p {
  color: var(--c-text);
}

.page-about .catalog-notes {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .catalog-notes li {
  position: relative;
  padding-left: 20px;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--c-mist);
}

.page-about .catalog-notes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 12px;
  height: 2px;
  background: var(--c-cyan);
}

.page-about .data-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  align-content: start;
}

.page-about .board-cell {
  padding: 16px 14px;
  border-radius: var(--r-md);
  border: 1px solid var(--about-line);
  background: linear-gradient(160deg, rgba(53, 240, 208, 0.09), rgba(13, 42, 66, 0.75));
}

.page-about .board-cell .num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 5.4vw, 2.5rem);
  line-height: 1;
  color: var(--c-cyan);
}

.page-about .board-label {
  display: block;
  margin-top: 8px;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--c-mist);
}

.page-about .cat-bands {
  display: flex;
  gap: 6px;
  height: 8px;
  margin-top: clamp(20px, 3.6vw, 32px);
}

.page-about .cat-band {
  flex: 1 1 0;
  border-radius: var(--r-pill);
}

.page-about .cat-band--1 { background: var(--c-band-1); }
.page-about .cat-band--2 { background: var(--c-band-2); }
.page-about .cat-band--3 { background: var(--c-band-3); }
.page-about .cat-band--4 { background: var(--c-band-4); }

/* ---------- 引文 ---------- */
.page-about .about-quote {
  padding: clamp(18px, 4vw, 44px) 0;
}

.page-about .pull-quote {
  margin: 0;
  padding-left: clamp(14px, 3vw, 30px);
  border-left: 3px solid var(--c-cyan);
}

.page-about .pull-quote blockquote {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.2rem, 3.4vw, 2rem);
  line-height: 1.55;
  color: var(--c-title);
  max-width: 40ch;
}

.page-about .pull-quote figcaption {
  margin-top: 14px;
  font-size: 0.84rem;
  letter-spacing: 0.08em;
  color: var(--c-mist);
}

/* ---------- 团队 ---------- */
.page-about .team-layout {
  display: grid;
  gap: clamp(20px, 3.8vw, 36px);
}

.page-about .team-figure {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--about-line);
}

.page-about .team-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .team-pills {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .team-pills li {
  padding: 14px 16px;
  border-radius: var(--r-md);
  border: 1px solid var(--about-line);
  background: var(--c-stand);
}

.page-about .team-pills .pill {
  display: inline-block;
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  padding: 3px 10px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(53, 240, 208, 0.45);
  color: var(--c-cyan-soft);
}

.page-about .team-pills .num {
  margin-left: 10px;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--c-orange);
}

.page-about .team-pills p {
  margin: 8px 0 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--c-text);
}

.page-about .flow {
  margin: clamp(20px, 3.4vw, 28px) 0 0;
  padding: 0;
  list-style: none;
  counter-reset: flow;
  display: grid;
  gap: 16px;
}

.page-about .flow li {
  position: relative;
  padding-left: 42px;
}

.page-about .flow li::before {
  counter-increment: flow;
  content: counter(flow, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--c-cyan);
  border: 1px solid var(--about-line);
  border-radius: var(--r-pill);
  background: var(--c-ink);
}

.page-about .flow li::after {
  content: "";
  position: absolute;
  left: 14px;
  top: 32px;
  bottom: -16px;
  width: 1px;
  background: var(--about-line);
}

.page-about .flow li:last-child::after {
  display: none;
}

.page-about .flow p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--c-mist);
}

/* ---------- 版本时间线 ---------- */
.page-about .versions-layout {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

.page-about .versions-intro > p {
  color: var(--c-text);
}

.page-about .versions-figure {
  margin: 18px 0 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--about-line);
}

.page-about .versions-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .timeline {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
  position: relative;
}

.page-about .tl-item {
  position: relative;
  padding: clamp(16px, 3vw, 24px);
  border-radius: var(--r-lg);
  border: 1px solid var(--about-line);
  background: var(--c-stand);
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.page-about .tl-item[data-in-view="true"] {
  border-color: rgba(53, 240, 208, 0.6);
  transform: translateX(2px);
}

.page-about .tl-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.page-about .tl-head h3 {
  margin: 0;
}

.page-about .tl-node {
  flex: 0 0 auto;
  width: 38px;
  height: 30px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--c-cyan);
  border: 1px solid rgba(53, 240, 208, 0.6);
  background: var(--c-ink);
  transition: background 0.3s ease, color 0.3s ease;
}

.page-about .tl-node--1 { border-radius: var(--r-sm); }
.page-about .tl-node--2 { border-radius: var(--r-pill); }
.page-about .tl-node--3 { border-radius: var(--r-lg); }

.page-about .tl-item[data-in-view="true"] .tl-node {
  background: var(--c-cyan);
  color: var(--c-ink);
  border-color: var(--c-cyan);
}

.page-about .tl-item p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.74;
  color: var(--c-mist);
}

/* ---------- 共建 ---------- */
.page-about .sheet--ink {
  background: linear-gradient(160deg, var(--c-ink) 0%, #0A1F33 72%, #0D2A42 100%);
  border-color: rgba(53, 240, 208, 0.22);
}

.page-about .eco-map {
  display: grid;
  gap: 14px;
  margin-top: 16px;
}

.page-about .eco-hub {
  padding: 12px 18px;
  border-radius: var(--r-pill);
  border: 1px dashed rgba(53, 240, 208, 0.45);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--c-cyan-soft);
  text-align: center;
}

.page-about .eco-nodes {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .eco-node {
  padding: 16px;
  border-radius: var(--r-md);
  border: 1px solid rgba(53, 240, 208, 0.16);
  border-top-width: 3px;
  background: rgba(13, 42, 66, 0.62);
}

.page-about .eco-node .num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 4vw, 1.9rem);
  line-height: 1;
  color: var(--c-cyan);
  margin-bottom: 8px;
}

.page-about .eco-node p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--c-mist);
}

.page-about .eco-node--media { border-top-color: var(--c-band-1); }
.page-about .eco-node--fans { border-top-color: var(--c-band-2); }
.page-about .eco-node--data { border-top-color: var(--c-band-4); }

.page-about .eco-note {
  margin: 18px 0 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--c-mist);
}

.page-about .eco-note a {
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 适用场景 ---------- */
.page-about .scene-grid {
  display: grid;
  gap: 12px;
}

.page-about .scene-card {
  padding: clamp(16px, 3vw, 22px);
  border-radius: var(--r-md);
  border: 1px solid var(--about-line);
  background: var(--c-stand);
  border-left-width: 4px;
}

.page-about .scene-card--home { border-left-color: var(--c-home); }
.page-about .scene-card--away { border-left-color: var(--c-away); }
.page-about .scene-card--cyan { border-left-color: var(--c-cyan); }

.page-about .scene-card .pill {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  padding: 3px 10px;
  border-radius: var(--r-pill);
  border: 1px solid var(--about-line);
  color: var(--c-mist);
}

.page-about .scene-card .pill--home {
  color: var(--c-home);
  border-color: rgba(45, 140, 255, 0.55);
}

.page-about .scene-card .pill--away {
  color: var(--c-away);
  border-color: rgba(255, 92, 53, 0.55);
}

.page-about .scene-card h3 {
  margin: 10px 0 8px;
  font-size: 1.05rem;
}

.page-about .scene-card p {
  margin: 0 0 14px;
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--c-mist);
}

.page-about .scene-link {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 208, 0.4);
  padding-bottom: 2px;
}

.page-about .start-strip {
  display: grid;
  gap: 14px;
  margin-top: clamp(22px, 4vw, 34px);
  padding: clamp(20px, 4vw, 32px);
  border-radius: var(--r-lg);
  background: linear-gradient(120deg, var(--c-orange) 0%, var(--c-orange-deep) 100%);
  color: #23120A;
}

.page-about .start-strip p {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.7;
  color: #23120A;
  max-width: 46ch;
}

.page-about .start-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .start-ghost {
  border-color: rgba(3, 11, 18, 0.55);
  color: #23120A;
}

.page-about a:focus-visible,
.page-about .pill:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .hero-scale {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

  .page-about .start-strip {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 960px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: end;
    gap: clamp(28px, 4vw, 54px);
  }

  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .catalog-wrap {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-about .versions-layout {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
  }

  .page-about .sheet--paper {
    margin-left: clamp(0px, 1.6vw, 22px);
  }

  .page-about .timeline {
    gap: 16px;
  }
}

@media (min-width: 1200px) {
  .page-about .data-board {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .board-cell {
    padding: 20px 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-item,
  .page-about .tl-node {
    transition: none;
  }

  .page-about .tl-item[data-in-view="true"] {
    transform: none;
  }
}
<<<END>>>