/* ============ 使命与历程页 ============ */
.page-about {
  --about-rail-w: 92px;
  position: relative;
  color: var(--slate-text);
  font-family: var(--font-body);
  background:
    radial-gradient(720px 460px at 88% -6%, rgba(139, 92, 246, .16), transparent 64%),
    radial-gradient(560px 400px at 4% 16%, rgba(0, 233, 255, .08), transparent 70%);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(30px, 5vw, 54px) 0 clamp(36px, 5vw, 68px);
}

.page-about .about-hero .breadcrumbs {
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

.page-about .about-hero h1 {
  margin: 0 0 clamp(16px, 2.2vw, 24px);
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(29px, 4.6vw, 50px);
  line-height: 1.18;
  letter-spacing: .04em;
  color: var(--ink-strong);
}

.page-about .about-hero__lead {
  margin: 0 0 clamp(26px, 3.4vw, 42px);
  max-width: 34em;
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--slate-text);
}

.page-about .about-figures {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-figure {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(18px, 2.2vw, 26px);
  background: linear-gradient(160deg, rgba(28, 37, 89, .92), rgba(7, 11, 36, .86));
}

.page-about .about-figure__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--electric-cyan);
}

.page-about .about-figure__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted-gray-blue);
}

/* ---------- 主体布局 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  padding-bottom: clamp(40px, 6vw, 80px);
}

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

.page-about .about-chapters {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  position: relative;
  min-width: 0;
}

.page-about .about-chapter + .about-chapter {
  padding-top: clamp(48px, 6vw, 88px);
}

.page-about .about-chapter + .about-chapter::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: min(520px, 72%);
  height: 1px;
  transform: skewX(-30deg);
  transform-origin: left center;
  opacity: .6;
  background: linear-gradient(90deg, var(--electric-cyan), rgba(139, 92, 246, .55), transparent);
  pointer-events: none;
}

.page-about .about-chapter__head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: clamp(22px, 3vw, 36px);
}

.page-about .about-chapter__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(42px, 8vw, 84px);
  font-weight: 700;
  line-height: .82;
  letter-spacing: -.02em;
  color: transparent;
  -webkit-text-stroke: 1.4px rgba(0, 233, 255, .48);
}

.page-about .about-chapter__kicker {
  margin: 0 0 8px;
  display: inline-block;
  padding-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--electric-cyan);
  border-bottom: 1px solid var(--line);
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 3.1vw, 33px);
  line-height: 1.28;
  letter-spacing: .04em;
  color: var(--ink-strong);
}

.page-about .about-chapter__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 36px);
}

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

.page-about .about-chapter__main > p {
  margin: 0 0 clamp(16px, 2vw, 22px);
  max-width: 34em;
  font-size: 16.5px;
  line-height: 1.9;
}

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

.page-about .about-chapter__main a {
  color: var(--electric-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 233, 255, .4);
  transition: color .22s var(--ease-out), border-color .22s var(--ease-out);
}

.page-about .about-chapter__main a:hover,
.page-about .about-chapter__main a:focus-visible {
  color: var(--neon-orange);
  border-bottom-color: var(--neon-orange);
}

/* ---------- 图文模块 ---------- */
.page-about .about-chapter .figure {
  margin: clamp(24px, 3vw, 34px) 0;
}

.page-about .about-chapter figcaption,
.page-about .about-note figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  line-height: 1.7;
  color: var(--muted-gray-blue);
}

.page-about .about-chapter .figure img,
.page-about .about-note .figure img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: clamp(28px, 3.4vw, 40px) 0 0;
  padding: 0;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 18px;
  width: 1px;
  background: linear-gradient(180deg, var(--electric-cyan), rgba(139, 92, 246, .55), transparent);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 clamp(26px, 3vw, 38px) clamp(30px, 4vw, 40px);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 19px;
  height: 19px;
  border-radius: 5px;
  border: 1px solid var(--electric-cyan);
  background: var(--deep-ink);
  box-shadow: 0 0 0 4px rgba(0, 233, 255, .09);
}

.page-about .about-timeline__stage {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--neon-orange);
}

.page-about .about-timeline__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.45;
  letter-spacing: .02em;
  color: var(--ink-strong);
}

.page-about .about-timeline__text {
  margin: 0;
  max-width: 32em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--slate-text);
}

/* ---------- 要点清单 ---------- */
.page-about .about-points {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0;
  padding: 0;
}

.page-about .about-points li {
  position: relative;
  margin-bottom: 18px;
  padding-left: 26px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.88;
}

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

.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 13px;
  height: 3px;
  border-radius: 2px;
  background: var(--neon-orange);
}

.page-about .about-points strong {
  color: var(--ink-strong);
  font-weight: 700;
}

.page-about .about-points--rhythm li::before {
  background: var(--electric-cyan);
}

/* ---------- 团队卡片 ---------- */
.page-about .about-teams {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2vw, 22px);
  margin: clamp(24px, 3vw, 34px) 0;
}

.page-about .about-team {
  position: relative;
  padding: clamp(22px, 2.6vw, 28px);
  background: linear-gradient(155deg, rgba(28, 37, 89, .9), rgba(18, 26, 69, .62));
  border-left: 2px solid var(--electric-cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
  transition: transform .3s var(--ease-out);
}

.page-about .about-team:hover {
  transform: translateY(-3px);
}

.page-about .about-team__tag {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--neon-orange);
}

.page-about .about-team__name {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: .03em;
  color: var(--ink-strong);
}

.page-about .about-team__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate-text);
}

/* ---------- 旁注卡 ---------- */
.page-about .about-note {
  position: relative;
  padding: clamp(20px, 2.4vw, 26px);
  background: linear-gradient(160deg, rgba(28, 37, 89, .95), rgba(18, 26, 69, .7));
  border-left: 2px solid var(--electric-cyan);
  border-radius: var(--radius-sm);
  font-size: 14px;
  line-height: 1.82;
  color: var(--slate-text);
}

.page-about .about-note__label {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted-gray-blue);
}

.page-about .about-note p {
  margin: 0 0 16px;
}

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

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  padding: clamp(20px, 3vw, 40px) 0 clamp(56px, 7vw, 96px);
}

.page-about .about-cta__panel {
  position: relative;
  padding: clamp(28px, 4vw, 48px);
  background: linear-gradient(122deg, rgba(18, 26, 69, .96), rgba(28, 37, 89, .68));
  border-left: 2px solid var(--electric-cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 40px), calc(100% - 40px) 100%, 0 100%);
}

.page-about .about-cta__inner {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 2.8vw, 30px);
  line-height: 1.3;
  letter-spacing: .04em;
  color: var(--ink-strong);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 32em;
  font-size: 15.5px;
  line-height: 1.85;
}

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

/* ---------- 桌面端 ---------- */
@media (min-width: 700px) {
  .page-about .about-chapter__head {
    display: grid;
    grid-template-columns: minmax(84px, 124px) minmax(0, 1fr);
    gap: clamp(20px, 3vw, 40px);
    align-items: start;
  }

  .page-about .about-teams {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 210px), 1fr));
  }
}

@media (min-width: 820px) {
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 36px);
  }

  .page-about .about-rail__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
  }

  .page-about .about-rail__link {
    display: flex;
    flex-direction: column;
    gap: 3px;
    padding: 4px 0 4px 12px;
    border-left: 2px solid var(--line-soft);
    text-decoration: none;
    transition: color .25s var(--ease-out), border-color .25s var(--ease-out);
  }

  .page-about .about-rail__num {
    font-family: var(--font-mono);
    font-size: 13px;
    letter-spacing: .12em;
    color: var(--muted-gray-blue);
    transition: color .25s var(--ease-out);
  }

  .page-about .about-rail__txt {
    font-size: 11px;
    letter-spacing: .1em;
    color: var(--muted-gray-blue);
    transition: color .25s var(--ease-out);
  }

  .page-about .about-rail__link:hover .about-rail__num,
  .page-about .about-rail__link:hover .about-rail__txt,
  .page-about .about-rail__link:focus-visible .about-rail__num,
  .page-about .about-rail__link:focus-visible .about-rail__txt {
    color: var(--electric-cyan);
  }

  .page-about .about-rail__link:focus-visible {
    outline: 2px solid var(--electric-cyan);
    outline-offset: 3px;
    border-radius: 2px;
  }

  .page-about .about-rail__link.is-active {
    border-left-color: var(--electric-cyan);
  }

  .page-about .about-rail__link.is-active .about-rail__num,
  .page-about .about-rail__link.is-active .about-rail__txt {
    color: var(--electric-cyan);
  }

  .page-about .about-chapter__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 3fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-chapter__grid--wide {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team,
  .page-about .about-rail__link,
  .page-about .about-rail__num,
  .page-about .about-rail__txt,
  .page-about .about-chapter__main a {
    transition: none;
  }

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