.page-about {
  --about-card-bg: linear-gradient(140deg, rgba(25, 59, 51, 0.92), rgba(6, 19, 18, 0.94));
  --about-accent-soft: rgba(200, 255, 61, 0.10);
  background:
    radial-gradient(130% 70% at 100% 0%, rgba(200, 255, 61, 0.06), transparent 62%),
    var(--ink);
  color: var(--mist);
  padding-bottom: clamp(48px, 6vw, 88px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(18px, 3vw, 36px) clamp(36px, 5vw, 68px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -12%;
  width: 48%;
  height: 96%;
  background: linear-gradient(160deg, rgba(200, 255, 61, 0.11), transparent 66%);
  transform: skewX(-14deg);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-about .about-hero__main > .display-title {
  margin: 10px 0 18px;
}

.page-about .hero-jump {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 26px 0 0;
  padding: 0;
}

.page-about .hero-jump a {
  display: inline-flex;
  align-items: center;
  padding: 8px 15px;
  border-radius: var(--pill);
  border: 1px solid var(--line-strong);
  font-size: 13px;
  line-height: 1.2;
  color: var(--mist);
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.page-about .hero-jump a:hover,
.page-about .hero-jump a:focus-visible {
  color: var(--lime);
  border-color: var(--lime);
  background: var(--about-accent-soft);
}

.page-about .hero-visual {
  margin: 0;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-strong);
  background: var(--deep);
  box-shadow: 0 26px 60px -34px rgba(0, 0, 0, 0.95);
}

.page-about .hero-visual::after {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -34%;
  width: 62%;
  height: 76%;
  background: linear-gradient(130deg, rgba(200, 255, 61, 0.24), transparent 70%);
  transform: skewX(-16deg);
  pointer-events: none;
}

.page-about .hero-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

/* ---------- 通用章节标题 ---------- */
.page-about .chapter-title {
  margin: 8px 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .lede-small {
  margin: 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.8;
  color: var(--steel);
}

/* ---------- 叙事 + 时间轨道 ---------- */
.page-about .about-story {
  padding-block: clamp(8px, 2vw, 20px) clamp(44px, 5.5vw, 80px);
}

.page-about .story-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 4vw, 56px);
  align-items: start;
}

.page-about .story-main {
  display: grid;
  gap: clamp(36px, 5vw, 64px);
  min-width: 0;
}

.page-about .origin-piece {
  position: relative;
  padding: clamp(24px, 3.4vw, 40px);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, var(--moss), var(--deep) 82%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 44px) 100%, 0 100%);
}

.page-about .origin-piece .prose {
  color: var(--mist);
}

.page-about .user-stack {
  display: grid;
  gap: 14px;
  margin-top: 4px;
}

.page-about .user-card {
  position: relative;
  padding: clamp(20px, 2.4vw, 28px);
  border-radius: var(--radius-md);
  background: var(--about-card-bg);
  border: 1px solid var(--line);
  border-left: 4px solid var(--lime);
  transition: transform 0.18s ease, border-color 0.18s ease;
}

.page-about .user-card:nth-child(2) {
  border-left-color: var(--teal);
}

.page-about .user-card:nth-child(3) {
  border-left-color: var(--orange);
}

.page-about .user-card:hover {
  transform: translateY(-2px);
  border-color: rgba(200, 255, 61, 0.4);
}

.page-about .user-card h3 {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.35;
  color: var(--paper);
}

.page-about .user-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 右侧阶段轨道 ---------- */
.page-about .story-rail {
  position: relative;
  min-width: 0;
}

.page-about .rail-track {
  position: relative;
  overflow: hidden;
  padding: clamp(18px, 2.4vw, 26px);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(16, 42, 36, 0.96), rgba(6, 19, 18, 0.98));
  border: 1px solid var(--line);
}

.page-about .rail-track__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
  pointer-events: none;
}

.page-about .rail-track > *:not(.rail-track__bg) {
  position: relative;
  z-index: 1;
}

.page-about .rail-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .rail-heading {
  font-size: clamp(19px, 2.2vw, 23px);
  margin: 6px 0 14px;
}

.page-about .stage {
  position: relative;
  margin-left: 6px;
  padding-left: 22px;
  border-left: 1px solid var(--line-strong);
}

.page-about .stage:last-child {
  padding-bottom: 2px;
}

.page-about .stage::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 17px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--steel);
  transition: background 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.page-about .stage[open]::before {
  background: var(--lime);
  border-color: var(--lime);
  box-shadow: 0 0 0 5px var(--about-accent-soft);
}

.page-about .stage summary {
  display: flex;
  align-items: baseline;
  gap: 10px;
  list-style: none;
  cursor: pointer;
  padding: 12px 0;
}

.page-about .stage summary::-webkit-details-marker {
  display: none;
}

.page-about .stage summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--steel);
  transition: color 0.18s ease;
}

.page-about .stage[open] summary::after {
  content: "–";
  color: var(--lime);
}

.page-about .stage-idx {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .stage-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15.5px;
  color: var(--paper);
}

.page-about .stage p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 团队协作 ---------- */
.page-about .about-team {
  padding-block: clamp(44px, 5.5vw, 84px);
  background: linear-gradient(180deg, transparent, rgba(16, 42, 36, 0.55) 22%, rgba(16, 42, 36, 0.55) 78%, transparent);
}

.page-about .team-head {
  max-width: 66ch;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-about .team-map {
  display: block;
  width: 100%;
  height: auto;
  min-height: 96px;
  margin-bottom: clamp(22px, 3vw, 36px);
}

.page-about .team-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .team-card {
  position: relative;
  padding: clamp(20px, 2.4vw, 26px);
  border-radius: var(--radius-md);
  background: rgba(25, 59, 51, 0.6);
  border: 1px solid var(--line);
  transition: transform 0.18s ease, border-color 0.18s ease;
}

.page-about .team-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  background: linear-gradient(90deg, var(--lime), transparent 92%);
}

.page-about .team-card:nth-child(2)::before {
  background: linear-gradient(90deg, var(--teal), transparent 92%);
}

.page-about .team-card:nth-child(3)::before {
  background: linear-gradient(90deg, var(--orange), transparent 92%);
}

.page-about .team-card:hover {
  transform: translateY(-2px);
  border-color: rgba(200, 255, 61, 0.42);
}

.page-about .team-card h3 {
  margin: 8px 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  color: var(--paper);
}

.page-about .team-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .team-visual {
  margin: clamp(22px, 3vw, 38px) 0 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-about .team-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* ---------- 长期价值 ---------- */
.page-about .about-why {
  padding-block: clamp(44px, 5.5vw, 84px);
}

.page-about .why-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 48px);
  align-items: start;
}

.page-about .why-copy .prose {
  color: var(--mist);
}

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

.page-about .why-stats li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 14px;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  background: linear-gradient(120deg, rgba(200, 255, 61, 0.09), rgba(6, 19, 18, 0.7));
  border: 1px solid var(--line);
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .stat-label {
  font-size: 14px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 合作引导 ---------- */
.page-about .about-cta {
  padding-block: clamp(8px, 2vw, 20px) clamp(20px, 3vw, 36px);
}

.page-about .cta-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4vw, 56px);
  border-radius: var(--radius-xl);
  border: 1px solid var(--line-strong);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(255, 122, 51, 0.2), transparent 56%),
    linear-gradient(140deg, var(--deep), var(--abyss));
}

.page-about .cta-panel::after {
  content: "";
  position: absolute;
  right: -10%;
  bottom: -42%;
  width: 54%;
  height: 112%;
  background: linear-gradient(140deg, rgba(200, 255, 61, 0.16), transparent 70%);
  transform: skewX(-16deg);
  pointer-events: none;
}

.page-about .cta-panel > * {
  position: relative;
  z-index: 1;
}

.page-about .cta-panel h2 {
  margin: 8px 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.2vw, 38px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .cta-panel p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .cta-note {
  margin-top: 18px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--steel);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .team-cols {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .team-visual img {
    aspect-ratio: 16 / 9;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 62fr) minmax(0, 38fr);
  }

  .page-about .why-grid {
    grid-template-columns: minmax(0, 58fr) minmax(0, 42fr);
  }
}

@media (min-width: 1080px) {
  .page-about .story-grid {
    grid-template-columns: minmax(0, 64fr) minmax(0, 36fr);
  }

  .page-about .story-rail {
    position: sticky;
    top: 92px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .user-card,
  .page-about .team-card,
  .page-about .hero-jump a,
  .page-about .stage::before,
  .page-about .stage summary::after {
    transition: none;
  }

  .page-about .user-card:hover,
  .page-about .team-card:hover {
    transform: none;
  }
}
<<<END>>>