.page-about {
  --about-index-w: 200px;
  --about-gap: 64px;
  display: block;
  background: var(--bg);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.36;
  z-index: 0;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(158deg, rgba(11, 7, 20, 0.55) 0%, rgba(11, 7, 20, 0.9) 58%, var(--bg) 100%),
    radial-gradient(120% 80% at 88% 8%, rgba(123, 63, 228, 0.35) 0%, rgba(11, 7, 20, 0) 62%);
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 2;
  padding: 48px 0 56px;
}

.page-about .about-crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 28px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}

.page-about .about-crumb a {
  color: var(--neon-light);
  text-decoration: none;
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--gold);
}

.page-about .about-crumb-sep {
  color: var(--line);
}

.page-about .about-eyebrow {
  margin: 0 0 16px;
  color: var(--jade);
}

.page-about .about-hero h1 {
  margin: 0 0 22px;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 6vw, 3.8rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-lede {
  max-width: 60ch;
  margin: 0;
  color: var(--ink-soft);
  font-size: clamp(1rem, 1.7vw, 1.1rem);
  line-height: 1.8;
}

.page-about .about-hero-stats {
  list-style: none;
  margin: 40px 0 0;
  padding: 24px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 24px;
}

.page-about .about-num {
  display: block;
  font-size: clamp(1.5rem, 3.4vw, 2.2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-about .about-num em {
  font-style: normal;
  font-size: 0.5em;
  margin-left: 2px;
  color: var(--jade);
}

.page-about .about-unit {
  display: block;
  margin-top: 10px;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

/* ---------- 主体两栏 ---------- */
.page-about .about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  padding-top: 48px;
  padding-bottom: 56px;
}

.page-about .about-index {
  display: none;
}

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

.page-about .about-sec {
  position: relative;
  padding: 38px 0;
  scroll-margin-top: 108px;
}

.page-about .about-sec::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--line);
}

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

.page-about .about-sec:first-child::after {
  display: none;
}

.page-about .about-sec .section-head {
  margin-bottom: 20px;
}

.page-about .about-sec .eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--neon-light);
}

.page-about .about-sec h2 {
  margin: 0;
  max-width: 26ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 3.6vw, 2.1rem);
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-sec .prose p {
  max-width: 66ch;
  margin: 0 0 16px;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

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

/* ---------- A1 内容线 ---------- */
.page-about .about-lines {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

.page-about .about-line {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0 18px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-line:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-line-id {
  padding-top: 3px;
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--jade);
}

.page-about .about-line h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.06rem;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-line p {
  max-width: 60ch;
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.76;
  color: var(--ink-soft);
}

/* ---------- B2 分段自查 ---------- */
.page-about .about-seg-wrap {
  margin-top: 26px;
}

.page-about .seg-panel {
  padding-top: 20px;
  color: var(--ink-soft);
  font-size: 0.96rem;
  line-height: 1.8;
  max-width: 64ch;
}

.page-about .seg-panel p {
  margin: 0;
}

/* ---------- C3 数据带与图表 ---------- */
.page-about .about-band {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px 20px;
  margin: 26px 0 30px;
  padding: 36px 24px 34px;
  background: linear-gradient(100deg, #FFC542 0%, #FFDD84 48%, #FFC542 100%);
  color: #1A1103;
  clip-path: polygon(0 2.5%, 100% 0, 100% 97.5%, 0 100%);
}

.page-about .about-band-num {
  display: block;
  font-size: clamp(1.6rem, 5vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  color: #1A1103;
  font-variant-numeric: tabular-nums;
}

.page-about .about-band-num em {
  font-style: normal;
  font-size: 0.42em;
  margin-left: 2px;
}

.page-about .about-band-label {
  display: block;
  margin-top: 10px;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  opacity: 0.78;
}

.page-about .about-chart {
  margin: 30px 0 0;
  padding: 0;
}

.page-about .about-chart svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .media-caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

/* ---------- D4 团队 ---------- */
.page-about .about-team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.page-about .about-roles {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-about .about-role {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 15px 12px;
  border-top: 1px solid var(--line);
  outline: none;
  transition: background-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-about .about-role:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-role:hover,
.page-about .about-role:focus-visible {
  background: var(--panel);
  box-shadow: inset 2px 0 0 var(--neon);
}

.page-about .about-role-num {
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--jade);
}

.page-about .about-role-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--ink);
}

.page-about .about-role-pop {
  position: absolute;
  left: 10px;
  right: 10px;
  top: calc(100% - 6px);
  z-index: 6;
  margin: 0;
  padding: 12px 14px;
  background: var(--panel-2);
  border-left: 2px solid var(--neon-light);
  color: var(--ink-soft);
  font-size: 0.86rem;
  line-height: 1.68;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.18s var(--ease), transform 0.18s var(--ease), visibility 0.18s;
}

.page-about .about-role:hover .about-role-pop,
.page-about .about-role:focus-visible .about-role-pop {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.page-about .about-team-media {
  margin: 0;
}

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

/* ---------- E5 赛季阶段 ---------- */
.page-about .about-phase {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .about-phase li {
  position: relative;
  padding: 2px 0 2px 18px;
  border-left: 1px solid var(--line);
}

.page-about .about-phase li::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 6px;
  width: 1px;
  height: 20px;
  background: var(--jade);
}

.page-about .about-phase-step {
  display: block;
  margin-bottom: 8px;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--jade);
}

.page-about .about-phase h3 {
  margin: 0 0 7px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  color: var(--ink);
}

.page-about .about-phase p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.74;
  color: var(--ink-soft);
}

.page-about .about-cycle-note {
  margin: 24px 0 0;
  padding: 14px 16px;
  border-left: 2px solid var(--jade);
  background: var(--jade-deep);
  color: var(--ink);
  font-size: 0.92rem;
  line-height: 1.72;
}

/* ---------- F6 本地服务 ---------- */
.page-about .about-local-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-about .about-info {
  margin: 24px 0 0;
  padding: 0;
}

.page-about .about-info-row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 13px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-info-row:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-info dt {
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.page-about .about-info dd {
  margin: 0;
  font-size: 0.92rem;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-about .about-partner {
  padding: 22px 20px;
  background: var(--panel);
  border-top: 2px solid var(--magenta);
}

.page-about .about-partner-kicker {
  margin: 0 0 14px;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--magenta);
}

.page-about .about-partner p {
  margin: 0 0 14px;
  font-size: 0.93rem;
  line-height: 1.78;
  color: var(--ink-soft);
}

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

.page-about .about-local-media {
  margin: 30px 0 0;
  padding: 0;
}

.page-about .about-local-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: clamp(180px, 26vw, 300px);
  object-fit: cover;
  border: 1px solid var(--line);
}

/* ---------- 底部去向 ---------- */
.page-about .about-next {
  padding-top: 8px;
  padding-bottom: 72px;
}

.page-about .about-next h2 {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  letter-spacing: -0.02em;
  color: var(--ink);
}

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

.page-about .about-next-list li {
  border-top: 1px solid var(--line);
}

.page-about .about-next-list li:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-next-list a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  padding: 18px 10px;
  text-decoration: none;
  color: var(--ink);
  transition: background-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-about .about-next-list a:hover,
.page-about .about-next-list a:focus-visible {
  background: var(--panel);
  box-shadow: inset 2px 0 0 var(--gold);
}

.page-about .about-next-idx {
  grid-row: span 2;
  padding-top: 3px;
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .about-next-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
}

.page-about .about-next-desc {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ---------- 桌面增强 ---------- */
@media (min-width: 760px) {
  .page-about .about-band {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    padding: 36px 30px 34px;
  }

  .page-about .about-phase {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 30px;
  }

  .page-about .about-info-row {
    grid-template-columns: 104px minmax(0, 1fr);
  }

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

  .page-about .about-next-list li:nth-child(2n) {
    border-right: 1px solid var(--line);
  }
}

@media (min-width: 980px) {
  .page-about .about-hero-inner {
    padding: 64px 0 72px;
  }

  .page-about .about-grid {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    gap: var(--about-gap);
    padding-top: 76px;
    padding-bottom: 88px;
  }

  .page-about .about-index {
    display: block;
    align-self: start;
    position: sticky;
    top: 104px;
  }

  .page-about .about-index-title {
    margin: 0 0 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--line);
    font-family: var(--font-serif);
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    color: var(--ink-soft);
  }

  .page-about .about-index-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 2px;
    counter-reset: aboutIndex;
  }

  .page-about .about-index-list a {
    display: flex;
    align-items: baseline;
    gap: 10px;
    padding: 9px 8px 9px 10px;
    border-left: 2px solid transparent;
    font-size: 0.84rem;
    line-height: 1.5;
    color: var(--ink-soft);
    text-decoration: none;
    transition: color 0.16s var(--ease), border-color 0.16s var(--ease), background-color 0.16s var(--ease);
  }

  .page-about .about-index-list a .mono {
    font-size: 0.68rem;
    color: var(--neon-light);
    opacity: 0.85;
  }

  .page-about .about-index-list a:hover,
  .page-about .about-index-list a:focus-visible {
    color: var(--ink);
    border-left-color: var(--neon-light);
    background: var(--panel);
  }

  .page-about:has(#about-lines:target) .about-index-list a[href="#about-lines"],
  .page-about:has(#about-access:target) .about-index-list a[href="#about-access"],
  .page-about:has(#about-scale:target) .about-index-list a[href="#about-scale"],
  .page-about:has(#about-team:target) .about-index-list a[href="#about-team"],
  .page-about:has(#about-cycle:target) .about-index-list a[href="#about-cycle"],
  .page-about:has(#about-local:target) .about-index-list a[href="#about-local"] {
    color: var(--ink);
    border-left-color: var(--neon);
    background: var(--panel-2);
  }

  .page-about .about-sec {
    padding: 46px 0;
  }

  .page-about .about-sec::before {
    content: "";
    position: absolute;
    left: -26px;
    top: 46px;
    bottom: 46px;
    width: 2px;
    background: var(--neon);
    opacity: 0;
    transition: opacity 0.2s var(--ease);
  }

  .page-about .about-sec:target::before {
    opacity: 1;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-team-media {
    transform: rotate(1.6deg);
    margin-top: 12px;
  }

  .page-about .about-local-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 40px;
    align-items: start;
  }

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

  .page-about .about-next-list li {
    border-right: 1px solid var(--line);
  }

  .page-about .about-next-list li:last-child {
    border-right: 1px solid var(--line);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }

  .page-about .about-team-media {
    transform: none;
  }
}