.page-about {
  --about-anchor: 180px;
  --about-note: 224px;
  --about-ink-soft: #d9e4ef;
  --about-panel: linear-gradient(180deg, rgba(18, 41, 63, .78), rgba(10, 26, 47, .78));
}

/* ---------- 首屏：斜切色块 + 错位数据列 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 56px 0 52px;
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(51, 230, 210, .16), transparent 62%),
    linear-gradient(180deg, var(--abyss-navy), var(--vault-void));
  border-bottom: 1px solid var(--hairline);
}

.page-about .about-hero-slab {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(150deg, rgba(51, 230, 210, .10), rgba(255, 180, 84, .05) 70%);
  clip-path: polygon(58% 0, 100% 0, 100% 100%, 30% 100%);
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.page-about .about-hero-copy {
  min-width: 0;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  max-width: 18ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 6vw, 58px);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--paper-warm);
}

.page-about .about-lede {
  margin: 20px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

.page-about .about-hero-actions {
  margin-top: 26px;
}

.page-about .about-hero-facts-wrap {
  min-width: 0;
}

.page-about .about-hero-facts {
  list-style: none;
  margin: 0;
  padding: 22px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 18px;
  border-top: 1px dashed var(--hairline-strong);
}

.page-about .about-hero-facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-fact-num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4.6vw, 36px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--neon-cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero-facts li:nth-child(2) .about-fact-num {
  color: var(--paper-warm);
}

.page-about .about-hero-facts li:nth-child(4) .about-fact-num {
  color: var(--amber-gold);
}

.page-about .about-fact-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist-gray);
}

.page-about .about-hero-anno {
  display: none;
}

@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 76px 0 64px;
  }

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

  .page-about .about-hero-anno {
    display: block;
    position: absolute;
    right: 14px;
    bottom: 30px;
    writing-mode: vertical-rl;
    transform: none;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: .28em;
    color: var(--mist-gray);
    z-index: 2;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
    gap: 48px;
  }

  .page-about .about-hero-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 18px;
    padding-top: 26px;
  }
}

/* ---------- 纵剖面主体骨架 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  padding-top: 48px;
}

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

.page-about .about-anchors {
  min-width: 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--hairline);
}

.page-about .about-anchor-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--mist-gray);
}

.page-about .about-anchor-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-anchor-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border: 1px solid var(--hairline);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--about-ink-soft);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-anchor-list a .mono {
  color: var(--neon-cyan);
  font-size: 12px;
}

.page-about .about-anchor-list a:hover,
.page-about .about-anchor-list a:focus-visible {
  border-color: var(--hairline-strong);
  background: rgba(51, 230, 210, .08);
  color: #fff;
}

.page-about .about-anchor-status {
  margin: 18px 0 0;
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist-gray);
}

.page-about .about-status-dot {
  flex: none;
  width: 8px;
  height: 8px;
  margin-top: 6px;
  border-radius: 50%;
  background: var(--jade-signal);
  box-shadow: 0 0 0 4px rgba(76, 212, 138, .16);
}

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: var(--about-anchor) minmax(0, 1fr);
    gap: 52px;
    padding-top: 64px;
  }

  .page-about .about-anchors {
    position: sticky;
    top: 28px;
    padding-top: 0;
    border-top: 0;
  }

  .page-about .about-anchor-list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 4px;
  }

  .page-about .about-anchor-list a {
    border: 0;
    border-left: 2px solid var(--hairline);
    border-radius: 0;
    padding: 9px 0 9px 14px;
    width: 100%;
  }

  .page-about .about-anchor-list a:hover,
  .page-about .about-anchor-list a:focus-visible {
    border-left-color: var(--neon-cyan);
    background: none;
  }

  .page-about .about-anchor-status {
    flex-direction: column;
    gap: 8px;
    margin-top: 22px;
    padding-left: 14px;
  }
}

/* ---------- 分层区块 ---------- */
.page-about .about-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding: 34px 0 40px;
  border-top: 1px solid var(--hairline);
  scroll-margin-top: 24px;
}

.page-about .about-section:first-child {
  border-top: 0;
  padding-top: 0;
}

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

.page-about .about-section h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.6vw, 36px);
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--paper-warm);
}

.page-about .about-section-main > p {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--about-ink-soft);
}

.page-about .about-section-main > p.muted {
  color: var(--mist-gray);
  font-size: 14px;
}

.page-about .about-note {
  min-width: 0;
  padding: 4px 0 4px 18px;
  border-left: 2px solid var(--hairline-strong);
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist-gray);
}

.page-about .about-note p {
  margin: 0;
}

.page-about .about-note-title {
  margin-bottom: 8px !important;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--neon-cyan);
}

@media (min-width: 1200px) {
  .page-about .about-section {
    grid-template-columns: minmax(0, 1fr) var(--about-note);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-note {
    position: sticky;
    top: 34px;
  }
}

/* ---------- 标签行 ---------- */
.page-about .about-tags {
  list-style: none;
  margin: 22px 0 18px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- 图版 ---------- */
.page-about .about-figure {
  margin: 24px 0 0;
  border: 1px solid var(--hairline);
  border-radius: var(--r-card);
  overflow: hidden;
  background:
    radial-gradient(120% 100% at 50% 0%, rgba(51, 230, 210, .10), transparent 68%),
    var(--abyss-navy);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: contain;
  padding: 16px;
  box-sizing: border-box;
}

.page-about .about-figure--line img {
  padding: 20px 12px;
}

.page-about .about-figure figcaption {
  padding: 12px 20px 16px;
  border-top: 1px solid var(--hairline);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--mist-gray);
}

/* ---------- 折叠剖面层 ---------- */
.page-about .about-accordion {
  margin-top: 26px;
  border: 1px solid var(--hairline);
  border-radius: var(--r-card);
  overflow: hidden;
  background: var(--about-panel);
}

.page-about .about-accordion .accordion-item + .accordion-item {
  border-top: 1px solid var(--hairline);
}

.page-about .about-accordion .accordion-heading {
  margin: 0;
  font-size: inherit;
}

.page-about .about-accordion .accordion-trigger {
  width: 100%;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 17px 18px;
  border: 0;
  background: none;
  text-align: left;
  cursor: pointer;
  color: var(--paper-warm);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15.5px;
  letter-spacing: -.01em;
  transition: background var(--dur) var(--ease);
}

.page-about .about-accordion .accordion-trigger:hover,
.page-about .about-accordion .accordion-trigger:focus-visible {
  background: rgba(51, 230, 210, .07);
}

.page-about .about-layer-idx {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--r-pill);
  background: rgba(51, 230, 210, .14);
  border: 1px solid var(--hairline-strong);
  color: var(--neon-cyan);
  font-size: 12px;
  font-weight: 700;
}

.page-about .about-layer-name {
  min-width: 0;
}

.page-about .about-layer-dot {
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1.5px solid var(--neon-cyan);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-accordion .accordion-trigger[aria-expanded="true"] .about-layer-dot {
  background: var(--amber-gold);
  border-color: var(--amber-gold);
  transform: scale(1.3);
}

.page-about .about-accordion .accordion-panel {
  padding: 0 18px 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist-gray);
}

.page-about .about-accordion .accordion-panel p {
  margin: 0 0 10px;
}

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

.page-about .about-accordion .accordion-panel .mono {
  font-size: 13px;
  color: var(--about-ink-soft);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}

.page-about .about-timeline li {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 26px;
}

.page-about .about-timeline li::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 16px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--hairline-strong), transparent);
}

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

.page-about .about-timeline li:last-child::before {
  display: none;
}

.page-about .about-tl-dot {
  width: 11px;
  height: 11px;
  margin-top: 6px;
  border-radius: 50%;
  border: 1.5px solid var(--neon-cyan);
  background: var(--vault-void);
}

.page-about .about-tl-dot--live {
  background: var(--amber-gold);
  border-color: var(--amber-gold);
  box-shadow: 0 0 0 5px rgba(255, 180, 84, .16);
}

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

.page-about .about-tl-body h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16.5px;
  line-height: 1.4;
  color: var(--paper-warm);
}

.page-about .about-tl-body p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

/* ---------- 数据表 ---------- */
.page-about .about-table-wrap {
  margin-top: 24px;
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--hairline);
  border-radius: var(--r-soft);
  background: rgba(10, 26, 47, .55);
}

.page-about .about-table {
  width: 100%;
  min-width: 480px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about .about-table caption {
  padding: 14px 16px 0;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mist-gray);
}

.page-about .about-table th,
.page-about .about-table td {
  padding: 13px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--hairline);
}

.page-about .about-table tbody tr:last-child th,
.page-about .about-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .about-table thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--neon-cyan);
}

.page-about .about-table tbody th {
  font-family: var(--font-display);
  font-weight: 800;
  color: var(--paper-warm);
}

.page-about .about-table tbody td {
  color: var(--mist-gray);
  line-height: 1.7;
}

.page-about .about-table tbody td.mono {
  color: var(--amber-gold);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  white-space: nowrap;
}

/* ---------- 评审节奏卡 ---------- */
.page-about .about-cadence {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-cadence-card {
  padding: 18px 18px 16px;
  border: 1px solid var(--hairline);
  border-radius: var(--r-soft);
  background: rgba(18, 41, 63, .6);
  min-width: 0;
}

.page-about .about-cadence-num {
  display: inline-block;
  padding: 3px 10px;
  margin-bottom: 10px;
  border-radius: var(--r-pill);
  background: rgba(51, 230, 210, .12);
  color: var(--neon-cyan);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.page-about .about-cadence-card strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15.5px;
  color: var(--paper-warm);
}

.page-about .about-cadence-card p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist-gray);
}

@media (min-width: 640px) {
  .page-about .about-cadence {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 出口纸面板 ---------- */
.page-about .about-exit {
  padding: 20px 0 64px;
}

.page-about .about-exit-panel {
  padding: 30px 24px 28px;
}

.page-about .about-exit-eyebrow {
  color: #7a6a4e;
}

.page-about .about-exit-panel h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3.4vw, 30px);
  line-height: 1.25;
  letter-spacing: -.02em;
  color: var(--ink-black);
}

.page-about .about-exit-grid {
  margin-top: 22px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-exit-card {
  display: block;
  padding: 16px 18px;
  border: 1px solid var(--paper-edge);
  border-radius: var(--r-paper);
  background: rgba(255, 255, 255, .38);
  text-decoration: none;
  color: var(--ink-black);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-exit-card:hover,
.page-about .about-exit-card:focus-visible {
  border-color: #b8935a;
  background: rgba(255, 255, 255, .68);
  transform: translateY(-2px);
}

.page-about .about-exit-key {
  display: block;
  font-size: 12px;
  letter-spacing: .1em;
  color: #7a6a4e;
}

.page-about .about-exit-card strong {
  display: block;
  margin-top: 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  line-height: 1.4;
}

.page-about .about-exit-desc {
  display: block;
  margin-top: 6px;
  font-size: 13.5px;
  line-height: 1.75;
  color: #4b4438;
}

@media (min-width: 720px) {
  .page-about .about-exit-panel {
    padding: 40px 36px 36px;
  }

  .page-about .about-exit-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-exit-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 降级：减少动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-anchor-list a,
  .page-about .about-layer-dot,
  .page-about .about-accordion .accordion-trigger,
  .page-about .about-exit-card {
    transition: none;
  }

  .page-about .about-exit-card:hover,
  .page-about .about-exit-card:focus-visible {
    transform: none;
  }

  .page-about .about-accordion .accordion-trigger[aria-expanded="true"] .about-layer-dot {
    transform: none;
  }
}