.page-about {
  background: var(--deep-sea);
  color: var(--mist);
  font-family: var(--font-body);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(40px, 7vw, 84px) 0 clamp(44px, 6vw, 72px);
  background:
    radial-gradient(58% 78% at 88% 4%, rgba(43, 27, 74, 0.9), transparent 62%),
    radial-gradient(46% 62% at 4% 98%, rgba(90, 31, 51, 0.5), transparent 66%),
    var(--deep-sea);
}

.page-about .hero-glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(90deg, rgba(55, 245, 212, 0.07) 0 1px, transparent 1px 104px);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.95), transparent 76%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.95), transparent 76%);
}

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

.page-about .eyebrow {
  color: var(--signal-cyan);
  margin-top: clamp(18px, 3vw, 30px);
}

.page-about .about-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 7vw, 82px);
  line-height: 1.04;
  letter-spacing: -0.03em;
  margin: 14px 0 0;
  color: var(--mist);
}

.page-about .title-hl {
  color: var(--signal-cyan);
}

.page-about .about-lede {
  max-width: 60ch;
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.95;
  color: var(--ink-80);
}

.page-about .hero-stats {
  list-style: none;
  margin: clamp(30px, 5vw, 52px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.page-about .hero-stats li {
  background: rgba(6, 28, 47, 0.72);
  padding: 18px 18px 20px;
  display: grid;
  gap: 8px;
  align-content: start;
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1;
  color: var(--signal-orange);
  letter-spacing: -0.01em;
}

.page-about .stat-label {
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-70);
}

/* ---------- 主体两栏 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
  padding-top: clamp(34px, 5vw, 64px);
  padding-bottom: clamp(48px, 8vw, 104px);
}

/* ---------- 章节索引 ---------- */
.page-about .chapter-rail {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 14px 0 8px;
}

.page-about .rail-title {
  margin: 0 0 10px;
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-about .rail-list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 20px;
  overflow-x: auto;
}

.page-about .rail-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  font-size: 14px;
  color: var(--ink-70);
  text-decoration: none;
  transition: color var(--ease);
}

.page-about .rail-list a:hover,
.page-about .rail-list a:focus-visible {
  color: var(--signal-cyan);
}

.page-about .rail-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--signal-orange);
}

/* ---------- 章节 ---------- */
.page-about .chapter {
  border-top: 1px solid var(--line);
  padding-top: clamp(22px, 3.4vw, 40px);
  margin-bottom: clamp(44px, 6vw, 84px);
}

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

.page-about .chapter-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--signal-orange);
  margin-bottom: 10px;
}

.page-about .chapter-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 4.2vw, 44px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  margin: 0 0 clamp(18px, 2.6vw, 28px);
  color: var(--mist);
}

.page-about .chapter-body p {
  max-width: 68ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.95;
  color: var(--ink-80);
  margin: 0 0 1.15em;
}

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

/* 靛紫有机色块 */
.page-about .chapter--indigo {
  background: linear-gradient(152deg, rgba(43, 27, 74, 0.92), rgba(11, 43, 69, 0.78));
  border-top: 0;
  border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) 8px;
  padding: clamp(22px, 3.4vw, 46px);
}

/* 酒红版本区 */
.page-about .chapter--wine {
  background: linear-gradient(168deg, rgba(90, 31, 51, 0.72), rgba(6, 28, 47, 0.9) 68%);
  border-top: 0;
  border-radius: 8px var(--radius-lg) var(--radius-lg) var(--radius-lg);
  padding: clamp(22px, 3.4vw, 46px);
}

/* 贵州地域色带 */
.page-about .chapter--guizhou {
  position: relative;
  overflow: hidden;
  border-top: 0;
  border-radius: 6px 6px var(--radius-lg) var(--radius-lg);
  padding: clamp(22px, 3.4vw, 46px) clamp(18px, 3vw, 40px) 0;
  background: linear-gradient(162deg, rgba(90, 31, 51, 0.5), rgba(6, 28, 47, 0.94) 62%);
}

.page-about .guizhou-ridge {
  display: block;
  width: 100%;
  height: 76px;
  margin-top: clamp(18px, 3vw, 30px);
}

/* ---------- 图片 ---------- */
.page-about .chapter-figure {
  margin: 0 0 clamp(20px, 3vw, 30px);
}

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

.page-about .chapter-figure figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--steel);
}

.page-about .chapter-figure--wide img {
  border-radius: var(--radius-md);
  aspect-ratio: 8 / 3;
}

/* ---------- 视图列表 ---------- */
.page-about .view-list {
  list-style: none;
  margin: 0 0 1.4em;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .view-list li {
  background: rgba(6, 28, 47, 0.66);
  padding: 16px 18px;
  display: grid;
  gap: 6px;
}

.page-about .view-name {
  font-family: var(--font-index);
  letter-spacing: 0.1em;
  font-size: 15px;
  color: var(--signal-cyan);
}

.page-about .view-desc {
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-70);
}

/* ---------- 团队 ---------- */
.page-about .team-viz {
  margin: 0 0 clamp(18px, 2.6vw, 26px);
}

.page-about .bar {
  display: flex;
  height: 12px;
  border-radius: var(--radius-pill);
  overflow: hidden;
  background: rgba(127, 162, 178, 0.16);
}

.page-about .bar-edit {
  flex: 9;
  background: linear-gradient(90deg, var(--signal-cyan), #24c9b4);
  transition: flex var(--ease);
}

.page-about .bar-rest {
  flex: 9;
  background: linear-gradient(90deg, #d95f22, var(--signal-orange));
}

.page-about .bar-legend {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-70);
}

.page-about .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.page-about .dot--cyan {
  background: var(--signal-cyan);
}

.page-about .dot--orange {
  background: var(--signal-orange);
}

.page-about .bar-sep {
  color: var(--steel);
  padding: 0 2px;
}

.page-about .role-list {
  list-style: none;
  margin: 0 0 clamp(20px, 3vw, 30px);
  padding: 0;
}

.page-about .role {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: 6px 14px;
  padding: 14px 6px 14px 16px;
  border-bottom: 1px solid var(--line);
  transition: background var(--ease);
}

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

.page-about .role::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: var(--line-strong);
  transform: scaleY(0.4);
  transform-origin: top;
  transition: transform var(--ease), background var(--ease);
}

.page-about .role-name {
  font-size: 15.5px;
  color: var(--mist);
  letter-spacing: 0.02em;
}

.page-about .role-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--steel);
}

.page-about .role-detail {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--ink-70);
}

.page-about .role:hover {
  background: rgba(55, 245, 212, 0.05);
}

.page-about .role:hover::before,
.page-about .role:focus-visible::before {
  background: var(--signal-cyan);
  transform: scaleY(1);
}

.page-about .role:focus-visible {
  outline: 2px solid var(--signal-cyan);
  outline-offset: 2px;
}

/* ---------- 时间线 ---------- */
.page-about .timeline {
  margin: 0 0 clamp(22px, 3.4vw, 34px);
}

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

.page-about .tl-node {
  position: relative;
  padding: 4px 10px 12px 24px;
  border-left: 1px solid var(--line-strong);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  transition: background var(--ease);
}

.page-about .tl-node:hover,
.page-about .tl-node:focus-visible {
  background: rgba(55, 245, 212, 0.07);
}

.page-about .tl-node:focus-visible {
  outline: 2px solid var(--signal-cyan);
  outline-offset: 2px;
}

.page-about .tl-dot {
  position: absolute;
  left: -5px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--signal-cyan);
  box-shadow: 0 0 0 4px rgba(55, 245, 212, 0.14);
  transition: box-shadow var(--ease), background var(--ease);
}

.page-about .tl-node:hover .tl-dot {
  background: var(--signal-orange);
  box-shadow: 0 0 0 6px rgba(255, 122, 47, 0.18);
}

.page-about .tl-year {
  display: block;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--signal-orange);
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}

.page-about .tl-title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  color: var(--mist);
  letter-spacing: 0.01em;
}

.page-about .tl-note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--ink-70);
  max-width: 40ch;
}

/* ---------- 联系 ---------- */
.page-about .contact-list {
  margin: 0 0 1.2em;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .contact-line {
  background: rgba(6, 28, 47, 0.7);
  display: grid;
  gap: 4px;
  padding: 13px 16px;
}

.page-about .contact-line dt {
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--steel);
  text-transform: uppercase;
}

.page-about .contact-line dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
  word-break: break-word;
}

.page-about .contact-line dd.num {
  font-family: var(--font-mono);
  font-size: 14.5px;
}

.page-about .contact-actions {
  margin: 0;
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  background:
    radial-gradient(70% 120% at 12% 0%, rgba(43, 27, 74, 0.85), transparent 60%),
    linear-gradient(180deg, rgba(11, 43, 69, 0.9), var(--deep-sea));
  border-top: 1px solid var(--line);
  padding: clamp(40px, 6vw, 76px) 0;
}

.page-about .cta-inner {
  display: grid;
  gap: clamp(20px, 3vw, 30px);
}

.page-about .cta-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 3.6vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  color: var(--mist);
}

.page-about .cta-text {
  margin: 0;
  max-width: 56ch;
  font-size: clamp(14.5px, 1.5vw, 16.5px);
  line-height: 1.95;
  color: var(--ink-70);
}

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

/* ---------- 桌面增强 ---------- */
@media (min-width: 900px) {
  .page-about .about-layout {
    grid-template-columns: 176px minmax(0, 1fr);
    gap: clamp(36px, 5vw, 88px);
  }

  .page-about .chapter-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
    border-top: 0;
    border-bottom: 0;
    padding: 0;
  }

  .page-about .rail-list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
  }

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

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

  .page-about .rail-list a {
    width: 100%;
    padding: 12px 0;
    transition: color var(--ease), padding-left var(--ease);
  }

  .page-about .rail-list a:hover,
  .page-about .rail-list a:focus-visible {
    padding-left: 8px;
  }

  .page-about .view-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .role-detail {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 220ms ease, opacity 220ms ease, margin-top 220ms ease;
  }

  .page-about .role:hover .role-detail,
  .page-about .role:focus-visible .role-detail {
    max-height: 120px;
    opacity: 1;
    margin-top: 4px;
  }

  .page-about .contact-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .cta-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }
}

@media (min-width: 1000px) {
  .page-about .tl-list {
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
  }

  .page-about .tl-node {
    padding: 26px 12px 10px 0;
    border-left: 0;
    border-top: 1px solid var(--line-strong);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
  }

  .page-about .tl-dot {
    left: 0;
    top: -5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .role,
  .page-about .role::before,
  .page-about .role-detail,
  .page-about .tl-node,
  .page-about .tl-dot,
  .page-about .rail-list a,
  .page-about .bar-edit {
    transition: none;
  }
}
<<<END>>>