.page-about {
  --about-lead: rgba(169, 183, 198, 0.92);
  --about-ink-soft: rgba(26, 20, 16, 0.76);
  background: var(--ink-800);
  color: var(--mint);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about .breadcrumb {
  padding-top: clamp(104px, 13vw, 128px);
}

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--slate-light);
}

.page-about .breadcrumb-link {
  color: var(--slate-light);
  text-decoration: none;
  transition: color 0.25s var(--ease);
}

.page-about .breadcrumb-link:hover {
  color: var(--cyan);
}

.page-about .breadcrumb-sep {
  color: var(--slate);
}

.page-about .breadcrumb-current {
  color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-about .hero {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  padding-top: clamp(22px, 3.6vw, 38px);
  padding-bottom: clamp(36px, 5vw, 64px);
}

.page-about .hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.15rem, 6.2vw, 4.05rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--mint);
}

.page-about .hero-lead {
  margin: 18px 0 0;
  max-width: 48ch;
  font-size: clamp(0.98rem, 1.5vw, 1.1rem);
  line-height: 1.85;
  color: var(--about-lead);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .hero-gauge {
  position: relative;
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 82% 0%, rgba(0, 229, 195, 0.15), transparent 62%),
    var(--ink-900);
}

.page-about .hero-gauge::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 72px;
  height: 72px;
  background: linear-gradient(225deg, var(--orange) 0 3px, transparent 3px);
}

.page-about .gauge-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate-light);
}

.page-about .gauge-num {
  margin: 16px 0 4px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(4.2rem, 13vw, 6.4rem);
  line-height: 0.9;
  letter-spacing: -0.05em;
  color: var(--cyan);
}

.page-about .gauge-ticks {
  height: 38px;
  margin: 10px 0 18px;
  background: repeating-linear-gradient(
    90deg,
    var(--slate-light) 0 1px,
    transparent 1px 12px
  );
  opacity: 0.38;
}

.page-about .gauge-list {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate-light);
}

.page-about .gauge-list li {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding-top: 9px;
  border-top: 1px solid var(--line-soft);
}

.page-about .gauge-list b {
  flex: none;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--mint);
}

/* ---------- 数据条 ---------- */
.page-about .stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .stat {
  padding: 18px 14px;
  background: var(--ink-800);
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.65rem, 3.4vw, 2.35rem);
  line-height: 1;
  color: var(--cyan);
}

.page-about .stat-num sup {
  font-size: 0.5em;
  vertical-align: super;
}

.page-about .stat-label {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--slate-light);
}

/* ---------- 章节索引 ---------- */
.page-about .index-bar {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 20px 0 4px;
  border-bottom: 1px solid var(--line-soft);
  scrollbar-width: thin;
}

.page-about .index-link {
  flex: none;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-capsule);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--slate-light);
  text-decoration: none;
  transition: color 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .index-link:hover,
.page-about .index-link[aria-current="true"] {
  color: var(--ink-900);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 章节通用 ---------- */
.page-about .band {
  position: relative;
  padding: clamp(46px, 6.6vw, 92px) 0;
}

.page-about .band--paper {
  background: var(--paper);
  color: var(--brown);
}

.page-about .band--midnight {
  background: var(--ink-900);
}

.page-about .band--ink {
  background: var(--ink-800);
}

.page-about .sec-head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(24px, 3.6vw, 42px);
}

.page-about .sec-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.55rem, 3.5vw, 2.6rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--mint);
}

.page-about .sec-lead {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(14px, 1.4vw, 15.5px);
  line-height: 1.85;
  color: var(--slate-light);
}

.page-about .band--paper .sec-title {
  color: var(--ink-800);
}

.page-about .band--paper .sec-lead {
  color: var(--about-ink-soft);
}

.page-about .band--paper .eyebrow,
.page-about .band--paper .eyebrow-dot {
  color: var(--slate);
}

.page-about .band--paper .eyebrow-dot {
  background: var(--orange);
}

.page-about .edge-note {
  display: none;
}

/* ---------- 品牌起点 ---------- */
.page-about .story-grid {
  display: grid;
  gap: clamp(24px, 3.6vw, 44px);
}

.page-about .timeline {
  margin: 0;
  padding: 0 0 0 22px;
  list-style: none;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(to bottom, var(--ink-800), rgba(11, 31, 58, 0.12));
}

.page-about .timeline li {
  position: relative;
  padding-bottom: 22px;
}

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

.page-about .timeline li::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 5px;
  width: 9px;
  height: 9px;
  border: 1px solid var(--ink-800);
  border-radius: 50%;
  background: var(--paper);
}

.page-about .timeline li:last-child::before {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.16);
}

.page-about .tl-num {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--slate);
}

.page-about .tl-title {
  margin: 5px 0 5px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--ink-800);
}

.page-about .tl-desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--about-ink-soft);
}

.page-about .prose p {
  margin: 0 0 16px;
  font-size: clamp(15px, 1.45vw, 16.5px);
  line-height: 1.9;
  color: rgba(26, 20, 16, 0.84);
}

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

.page-about .band--ink .prose p,
.page-about .band--midnight .prose p {
  color: var(--about-lead);
}

/* ---------- 图片 ---------- */
.page-about .figure-block {
  margin: clamp(28px, 4.4vw, 52px) 0 0;
}

.page-about .figure-block--tight {
  margin-top: 0;
}

.page-about .media-frame {
  border: 1px solid var(--line);
  background: var(--ink-900);
  overflow: hidden;
}

.page-about .band--paper .media-frame {
  border-color: rgba(11, 31, 58, 0.18);
  background: rgba(11, 31, 58, 0.06);
}

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

.page-about .media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .band--ink .media-caption,
.page-about .band--midnight .media-caption {
  color: var(--slate-light);
}

/* ---------- 团队 ---------- */
.page-about .crew-grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(24px, 3.6vw, 40px);
}

.page-about .crew-card {
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(0, 229, 195, 0.06), transparent 58%);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease);
}

.page-about .crew-card:hover,
.page-about .crew-card:focus-within {
  transform: translateY(-4px);
  border-color: var(--line-cyan);
}

.page-about .crew-index {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.24em;
  color: var(--cyan);
}

.page-about .crew-name {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.14rem;
  color: var(--mint);
}

.page-about .crew-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--slate-light);
}

.page-about .crew-list li {
  position: relative;
  padding-left: 13px;
}

.page-about .crew-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 5px;
  height: 1px;
  background: var(--cyan);
}

.page-about .crew-tie {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--cyan);
}

/* ---------- 改版 ---------- */
.page-about .rebuild-grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
}

.page-about .rail-viz {
  display: grid;
  gap: 14px;
  align-self: start;
  padding: clamp(16px, 2.8vw, 24px);
  border: 1px solid var(--line);
  background:
    linear-gradient(160deg, rgba(0, 229, 195, 0.09), transparent 58%),
    var(--ink-800);
  color: var(--mint);
}

.page-about .rail-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .rail-row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .rail-tag {
  flex: none;
  min-width: 56px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .rail-chip {
  padding: 6px 11px;
  border: 1px solid var(--line);
  font-size: 12px;
  line-height: 1.4;
  color: var(--mint);
}

.page-about .rail-chip--accent {
  border-color: var(--line-orange);
  color: var(--orange);
}

.page-about .rail-note {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--slate-light);
}

/* ---------- 覆盖与节奏 ---------- */
.page-about .reach-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-about .reach-cell {
  padding: clamp(18px, 3vw, 26px);
  background: var(--ink-900);
}

.page-about .reach-num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .reach-num sup {
  font-size: 0.48em;
  vertical-align: super;
}

.page-about .reach-label {
  margin: 10px 0 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--mint);
}

.page-about .reach-desc {
  margin: 7px 0 0;
  font-size: 12.5px;
  line-height: 1.72;
  color: var(--slate-light);
}

/* ---------- 合作生态 ---------- */
.page-about .partner-layout {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .orbit {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  padding: clamp(14px, 2.6vw, 24px);
  border: 1px solid var(--line);
}

.page-about .orbit-track {
  position: relative;
  z-index: 1;
  padding: 15px 16px;
  border: 1px solid var(--line-soft);
  background: var(--ink-900);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .orbit-track:hover {
  border-color: var(--line-cyan);
  transform: translateX(3px);
}

.page-about .orbit-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(0, 229, 195, 0.7);
  vertical-align: middle;
}

.page-about .orbit-title {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--mint);
}

.page-about .orbit-desc {
  margin: 7px 0 0 16px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--slate-light);
}

.page-about .partner-note {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--orange);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--about-lead);
}

/* ---------- 五步 ---------- */
.page-about .flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(24px, 3.6vw, 40px) 0 0;
  padding: 0;
  list-style: none;
  background: rgba(11, 31, 58, 0.16);
}

.page-about .flow-step {
  padding: clamp(16px, 2.6vw, 22px);
  background: var(--paper);
  border-top: 2px solid var(--ink-800);
}

.page-about .flow-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.55rem, 3vw, 2rem);
  line-height: 1;
  color: var(--orange);
}

.page-about .flow-name {
  margin: 12px 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--ink-800);
}

.page-about .flow-desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--about-ink-soft);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  background: linear-gradient(115deg, var(--ink-900) 0%, var(--ink-700) 100%);
  border-top: 1px solid var(--line-cyan);
}

.page-about .cta-inner {
  display: grid;
  gap: 22px;
  padding-top: clamp(38px, 5.4vw, 76px);
  padding-bottom: clamp(38px, 5.4vw, 76px);
}

.page-about .cta-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 3.2vw, 2.2rem);
  line-height: 1.2;
  color: var(--mint);
}

.page-about .cta-lead {
  margin: 12px 0 0;
  max-width: 52ch;
  font-size: clamp(14px, 1.4vw, 15.5px);
  line-height: 1.85;
  color: var(--about-lead);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-about .orbit {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }
}

@media (min-width: 680px) {
  .page-about .stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .crew-card:nth-child(even) {
    margin-top: 20px;
  }

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

@media (min-width: 900px) {
  .page-about .flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .cta-inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: center;
  }

  .page-about .cta-actions {
    justify-content: flex-end;
  }
}

@media (min-width: 960px) {
  .page-about .hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: end;
  }

  .page-about .story-grid {
    grid-template-columns: minmax(0, 0.34fr) minmax(0, 0.66fr);
    align-items: start;
  }

  .page-about .rebuild-grid {
    grid-template-columns: minmax(0, 0.62fr) minmax(0, 0.38fr);
    align-items: start;
  }

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

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

@media (min-width: 1080px) {
  .page-about .crew-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .crew-card:nth-child(even) {
    margin-top: 26px;
  }
}

@media (min-width: 1200px) {
  .page-about .edge-note {
    display: block;
    position: absolute;
    left: 14px;
    top: clamp(70px, 9vw, 116px);
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: 0.34em;
    color: var(--slate);
    pointer-events: none;
  }

  .page-about .edge-note--alt {
    color: rgba(26, 20, 16, 0.38);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .crew-card,
  .page-about .orbit-track,
  .page-about .index-link {
    transition: none;
  }

  .page-about .crew-card:hover,
  .page-about .crew-card:focus-within,
  .page-about .orbit-track:hover {
    transform: none;
  }
}