.page-about {
  --about-rail: 2.4rem;
  --about-glow: rgba(36, 224, 210, .14);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.5rem, 4vw, 2.5rem) 0 clamp(3rem, 7vw, 5.5rem);
  background:
    radial-gradient(115% 85% at 86% 4%, var(--about-glow), transparent 58%),
    radial-gradient(85% 65% at 4% 98%, rgba(200, 255, 61, .06), transparent 62%);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(2rem, 5vw, 4rem);
  margin-top: clamp(1.75rem, 5vw, 3.25rem);
}

@media (min-width: 920px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, .82fr);
    align-items: start;
  }
}

.page-about .about-hero h1 {
  margin: .7rem 0 1.1rem;
  font-size: clamp(2.5rem, 8vw, 5.4rem);
  font-weight: 200;
  line-height: .98;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-about .about-hero__intro {
  max-width: 34em;
  margin: 0 0 1.75rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

/* 运营刻度玻璃板 */

.page-about .about-board {
  position: relative;
  overflow: hidden;
  padding: clamp(1.25rem, 3vw, 1.9rem);
  border: 1px solid var(--glass-line);
  border-radius: var(--r-card);
  background: var(--glass);
  backdrop-filter: blur(10px);
}

.page-about .about-board::after {
  content: "";
  position: absolute;
  right: -3.5rem;
  bottom: -3.5rem;
  width: 11rem;
  height: 11rem;
  border-radius: 50%;
  border: 1px solid var(--glass-line);
  box-shadow:
    inset 0 0 0 1.6rem rgba(36, 224, 210, .05),
    inset 0 0 0 3.4rem rgba(36, 224, 210, .035);
  pointer-events: none;
}

.page-about .about-board__radar {
  position: absolute;
  top: -2.6rem;
  right: -2.6rem;
  width: 9rem;
  height: 9rem;
  border-radius: 50%;
  background: conic-gradient(from 0deg, rgba(36, 224, 210, .38), rgba(36, 224, 210, 0) 30%);
  opacity: .55;
  animation: about-radar 8s linear infinite;
  pointer-events: none;
}

@keyframes about-radar {
  to { transform: rotate(360deg); }
}

.page-about .about-board__rows {
  list-style: none;
  margin: .9rem 0 0;
  padding: 0;
  display: grid;
}

.page-about .about-board__rows li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: .62rem 0;
  border-bottom: 1px dashed var(--line);
  font-size: .875rem;
}

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

.page-about .about-board__k {
  color: var(--mist);
}

.page-about .about-board__v {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--cyan);
}

/* ---------- 画册式章节骨架 ---------- */

.page-about .about-chapter {
  display: grid;
  gap: clamp(1.25rem, 4vw, 2.5rem);
}

@media (min-width: 900px) {
  .page-about .about-chapter {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    gap: clamp(2rem, 5vw, 5rem);
  }
}

.page-about .about-chapter__head h2 {
  margin: .7rem 0 0;
  font-size: clamp(1.9rem, 5.2vw, 3.4rem);
  font-weight: 200;
  line-height: 1.04;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-about .about-chapter__body p {
  color: var(--mist);
}

/* ---------- 版本时间轴 ---------- */

.page-about .about-track__head {
  max-width: 44rem;
}

.page-about .about-track__head h2 {
  margin: .7rem 0 .75rem;
  font-size: clamp(1.9rem, 5.2vw, 3.4rem);
  font-weight: 200;
  line-height: 1.04;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-about .about-track__note {
  margin: 0;
  color: var(--mist);
  line-height: 1.8;
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: clamp(2.25rem, 6vw, 3.75rem) 0 0;
  padding: 0 0 0 var(--about-rail);
  display: grid;
  gap: clamp(1.9rem, 5vw, 3.1rem);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: .55rem;
  bottom: .55rem;
  left: .8rem;
  width: 1px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(36, 224, 210, .26) 58%, rgba(36, 224, 210, 0) 100%);
}

.page-about .about-step {
  position: relative;
  display: grid;
  gap: .5rem;
}

.page-about .about-step::before {
  content: "";
  position: absolute;
  left: -1.95rem;
  top: .45rem;
  width: .7rem;
  height: .7rem;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 .3rem rgba(36, 224, 210, .12);
  transition: background .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .about-step:hover::before,
.page-about .about-step:focus-within::before {
  background: var(--cyan);
  box-shadow: 0 0 0 .55rem rgba(36, 224, 210, .22);
}

@media (min-width: 760px) {
  .page-about .about-step {
    grid-template-columns: minmax(0, 4.5rem) minmax(0, 1fr);
    gap: clamp(1rem, 3vw, 2.25rem);
    align-items: start;
  }
}

.page-about .about-step__ver {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.35rem, 3.4vw, 2.05rem);
  font-weight: 700;
  letter-spacing: -.03em;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-step__body h3 {
  margin: 0 0 .5rem;
  font-size: clamp(1.12rem, 2.4vw, 1.45rem);
  font-weight: 500;
  line-height: 1.4;
  color: var(--white);
}

.page-about .about-step__body p {
  margin: 0;
  max-width: 34em;
  color: var(--mist);
  line-height: 1.85;
}

.page-about .about-track__figure {
  margin: clamp(2.5rem, 6vw, 4rem) 0 0;
}

/* ---------- 数据维护（暖纸章节） ---------- */

.page-about .about-ops__head {
  max-width: 46rem;
}

.page-about .about-ops__head h2 {
  margin: .7rem 0 .8rem;
  font-size: clamp(1.9rem, 5.2vw, 3.4rem);
  font-weight: 200;
  line-height: 1.04;
  letter-spacing: -.02em;
  color: var(--paper-ink);
}

.page-about .about-ops__intro {
  margin: 0;
  color: rgba(19, 26, 31, .74);
  line-height: 1.85;
}

.page-about .about-shifts {
  display: grid;
  gap: clamp(.9rem, 2.4vw, 1.2rem);
  margin-top: clamp(1.75rem, 5vw, 2.75rem);
}

@media (min-width: 760px) {
  .page-about .about-shifts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .about-shifts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: start;
  }
}

.page-about .shift-card {
  display: flex;
  flex-direction: column;
  gap: .55rem;
  padding: 1.15rem 1.05rem 1.3rem;
  border: 1px solid rgba(19, 26, 31, .16);
  border-radius: var(--r-card);
  background: rgba(255, 255, 255, .58);
  transition: transform .3s var(--ease), background .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .shift-card:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-about .shift-card__phase {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(19, 26, 31, .52);
}

.page-about .shift-card h3 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--paper-ink);
}

.page-about .shift-card__lead {
  margin: 0;
  font-size: .92rem;
  line-height: 1.7;
  color: rgba(19, 26, 31, .78);
}

.page-about .shift-card__detail {
  max-height: none;
  opacity: 1;
  overflow: hidden;
}

.page-about .shift-card__detail p {
  margin: .55rem 0 0;
  padding-top: .7rem;
  border-top: 1px dashed rgba(19, 26, 31, .18);
  font-size: .86rem;
  line-height: 1.75;
  color: rgba(19, 26, 31, .62);
}

@media (hover: hover) and (min-width: 1080px) {
  .page-about .shift-card__detail {
    max-height: 0;
    opacity: 0;
    transition: max-height .42s var(--ease), opacity .3s var(--ease);
  }

  .page-about .shift-card:hover,
  .page-about .shift-card:focus-within {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, .92);
    box-shadow: 0 20px 40px rgba(19, 26, 31, .14);
  }

  .page-about .shift-card:hover .shift-card__detail,
  .page-about .shift-card:focus-within .shift-card__detail {
    max-height: 16rem;
    opacity: 1;
  }
}

.page-about .about-ops__figure {
  margin: clamp(2rem, 5vw, 3rem) 0 0;
}

/* ---------- 覆盖范围 ---------- */

.page-about .about-reach__grid {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
}

@media (min-width: 900px) {
  .page-about .about-reach__grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, .96fr);
    align-items: end;
  }
}

.page-about .about-reach h2 {
  margin: .7rem 0 1rem;
  font-size: clamp(1.9rem, 5.2vw, 3.3rem);
  font-weight: 200;
  line-height: 1.04;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-about .about-reach__lead {
  max-width: 34em;
  margin: 0 0 1rem;
  color: var(--mist);
  line-height: 1.85;
}

.page-about .about-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 1.08em;
  letter-spacing: -.01em;
  color: var(--cyan);
}

.page-about .about-reach__facts {
  list-style: none;
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-reach__facts li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: .6rem 0;
  border-bottom: 1px dashed var(--line);
  font-size: .875rem;
}

.page-about .about-reach__facts li:last-child {
  border-bottom: 0;
}

.page-about .about-reach__k {
  color: var(--mist);
}

.page-about .about-reach__viz {
  padding: clamp(1.25rem, 3vw, 1.75rem);
  border: 1px solid var(--glass-line);
  border-radius: var(--r-card);
  background: var(--glass);
}

.page-about .about-bars {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(0, 1fr);
  align-items: end;
  gap: .4rem;
  height: clamp(7rem, 17vw, 10rem);
  margin: 1rem 0 0;
  padding-bottom: 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-bars span {
  display: block;
  min-height: 6%;
  border-radius: .3rem .3rem 0 0;
  background: linear-gradient(180deg, var(--cyan-soft), rgba(36, 224, 210, .14));
  animation: about-pulse 2s ease-in-out infinite;
}

.page-about .about-bars span:nth-child(1)  { height: 14%; animation-delay: 0s; }
.page-about .about-bars span:nth-child(2)  { height: 10%; animation-delay: .1s; }
.page-about .about-bars span:nth-child(3)  { height: 17%; animation-delay: .2s; }
.page-about .about-bars span:nth-child(4)  { height: 25%; animation-delay: .3s; }
.page-about .about-bars span:nth-child(5)  { height: 39%; animation-delay: .4s; }
.page-about .about-bars span:nth-child(6)  { height: 57%; animation-delay: .5s; }
.page-about .about-bars span:nth-child(7)  { height: 78%; animation-delay: .6s; }
.page-about .about-bars span:nth-child(8)  { height: 96%; background: linear-gradient(180deg, var(--lime), rgba(200, 255, 61, .18)); animation-delay: .7s; }
.page-about .about-bars span:nth-child(9)  { height: 88%; animation-delay: .8s; }
.page-about .about-bars span:nth-child(10) { height: 63%; animation-delay: .9s; }
.page-about .about-bars span:nth-child(11) { height: 41%; animation-delay: 1s; }
.page-about .about-bars span:nth-child(12) { height: 22%; animation-delay: 1.1s; }

@keyframes about-pulse {
  0%, 100% { opacity: .72; }
  50% { opacity: 1; }
}

.page-about .about-bars__note {
  margin: .9rem 0 0;
  font-size: .78rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 使用时刻 ---------- */

.page-about .about-scenes__head h2 {
  margin: .7rem 0 0;
  font-size: clamp(1.9rem, 5.2vw, 3.3rem);
  font-weight: 200;
  line-height: 1.04;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-about .about-scene-list {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.25rem);
  margin-top: clamp(1.75rem, 5vw, 3rem);
}

.page-about .about-scene {
  max-width: 40rem;
  padding-top: clamp(1rem, 2.5vw, 1.5rem);
  border-top: 1px solid var(--line);
}

@media (min-width: 860px) {
  .page-about .about-scene:nth-child(2) { margin-left: 11%; }
  .page-about .about-scene:nth-child(3) { margin-left: 22%; }
}

.page-about .about-scene h3 {
  margin: .85rem 0 .55rem;
  font-size: clamp(1.15rem, 2.6vw, 1.5rem);
  font-weight: 400;
  color: var(--white);
}

.page-about .about-scene p {
  margin: 0;
  color: var(--mist);
  line-height: 1.85;
}

/* ---------- 团队 ---------- */

.page-about .about-team__roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(1.25rem, 3vw, 1.75rem);
}

@media (min-width: 720px) {
  .page-about .about-team__roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(1.25rem, 3vw, 2rem) clamp(1.5rem, 4vw, 2.75rem);
  }
}

.page-about .about-team__roles h3 {
  margin: 0 0 .45rem;
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--cyan);
}

.page-about .about-team__roles p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-team__note {
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
  padding-top: clamp(1rem, 2.5vw, 1.4rem);
  border-top: 1px solid var(--line);
  font-size: .92rem;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 结论与收束 ---------- */

.page-about .about-why__head h2 {
  margin: .7rem 0 0;
  font-size: clamp(1.9rem, 5.2vw, 3.3rem);
  font-weight: 200;
  line-height: 1.04;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-about .about-why__lines {
  display: grid;
  gap: clamp(1.1rem, 3vw, 1.75rem);
  margin-top: clamp(1.75rem, 5vw, 3rem);
}

.page-about .about-why__line {
  display: grid;
  gap: .6rem;
  margin: 0;
  padding-top: clamp(.9rem, 2vw, 1.25rem);
  border-top: 1px solid var(--line);
  font-size: clamp(1.28rem, 3.5vw, 2.35rem);
  font-weight: 200;
  line-height: 1.22;
  letter-spacing: -.02em;
  color: var(--white);
}

@media (min-width: 760px) {
  .page-about .about-why__line {
    grid-template-columns: 2.5rem minmax(0, 1fr);
    align-items: start;
    gap: 1rem;
  }
}

.page-about .about-why__idx {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .2em;
  color: var(--lime);
  padding-top: .85rem;
}

.page-about .about-why__figure {
  margin: clamp(2.5rem, 6vw, 4rem) 0 0;
}

.page-about .about-cta {
  display: grid;
  gap: 1.25rem;
  justify-items: start;
  margin-top: clamp(2rem, 5vw, 3rem);
}

@media (min-width: 780px) {
  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    justify-items: end;
    gap: 2rem;
  }

  .page-about .about-cta__lead {
    justify-self: start;
  }
}

.page-about .about-cta__lead {
  margin: 0;
  max-width: 32em;
  color: var(--white);
  line-height: 1.8;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

.page-about .about-cta__note {
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0;
  padding-top: clamp(1rem, 2.5vw, 1.4rem);
  border-top: 1px solid var(--line);
  font-size: .86rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-cta__note .action-link {
  color: var(--cyan);
}

/* ---------- 动效收敛 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-about .about-board__radar,
  .page-about .about-bars span {
    animation: none;
  }

  .page-about .shift-card,
  .page-about .about-step::before {
    transition: none;
  }
}
<<<END>>>