.page-about {
  --about-rail: 208px;
  --about-gap: clamp(32px, 5vw, 76px);
  position: relative;
  background:
    radial-gradient(90% 55% at 100% 0%, rgba(74, 44, 214, .3), transparent 62%),
    var(--void);
  color: var(--ink);
  padding-bottom: clamp(56px, 8vw, 120px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + clamp(26px, 5vw, 68px)) 0 clamp(22px, 4vw, 46px);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(16px, 2.4vw, 28px);
}

.page-about .about-hero__frame {
  position: relative;
  padding: clamp(24px, 3.6vw, 56px) clamp(20px, 3.6vw, 58px) clamp(24px, 3.2vw, 46px);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 150% at 92% -18%, rgba(122, 77, 255, .42), transparent 58%),
    radial-gradient(85% 120% at -8% 112%, rgba(53, 225, 232, .16), transparent 60%),
    linear-gradient(180deg, rgba(11, 18, 38, .92), rgba(5, 7, 15, .78));
  box-shadow: var(--shadow-deep);
  overflow: hidden;
}

.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  inset: clamp(8px, 1vw, 13px);
  border: 1px solid rgba(255, 255, 255, .07);
  border-radius: calc(var(--radius) - 6px);
  pointer-events: none;
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  left: 8%;
  right: 8%;
  bottom: 0;
  height: 1px;
  background: repeating-linear-gradient(90deg, rgba(255, 255, 255, .24) 0 1px, transparent 1px 16px);
  pointer-events: none;
}

.page-about .about-hero h1 {
  margin: 14px 0 18px;
  max-width: 20ch;
  font-size: clamp(30px, 6.4vw, 64px);
  font-weight: 250;
  line-height: 1.08;
  letter-spacing: -0.02em;
  text-shadow: 0 0 40px rgba(122, 77, 255, .45);
}

.page-about .about-hero .lede {
  max-width: 62ch;
  margin: 0;
  color: var(--ink-dim);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.86;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: clamp(14px, 2vw, 28px);
  margin-top: clamp(26px, 4vw, 44px);
  padding-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--rule);
}

.page-about .about-hero__num {
  display: block;
  font-family: var(--f-mono);
  font-size: clamp(22px, 3.2vw, 34px);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: .02em;
  color: var(--gold);
}

.page-about .about-hero__cap {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-dim);
}

/* ---------- 编辑部双栏骨架 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 48px);
  padding-top: clamp(24px, 4vw, 48px);
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
  }
}

/* ---------- 左侧窄注栏 ---------- */
.page-about .about-rail {
  display: grid;
  gap: clamp(18px, 2.4vw, 28px);
}

@media (min-width: 1024px) {
  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }
}

.page-about .about-rail__label {
  margin: 0 0 8px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.page-about .about-rail__years {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  margin: 0;
  padding: 0;
}

@media (min-width: 1024px) {
  .page-about .about-rail__years {
    flex-direction: column;
    gap: 0;
  }
}

.page-about .about-rail__years a {
  display: inline-block;
  padding: 5px 0;
  font-family: var(--f-mono);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--ink-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease), padding-left .2s var(--ease);
}

.page-about .about-rail__years a:hover {
  color: var(--laser);
  border-bottom-color: rgba(53, 225, 232, .45);
  padding-left: 4px;
}

.page-about .about-rail__years a:focus-visible {
  outline: 1px solid var(--laser);
  outline-offset: 3px;
  color: var(--laser);
}

.page-about .about-fact {
  padding: 12px 0;
  border-top: 1px solid var(--rule);
}

.page-about .about-fact__num {
  display: block;
  font-family: var(--f-mono);
  font-size: 19px;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--laser);
}

.page-about .about-fact__label {
  display: block;
  margin-top: 2px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink-dim);
}

.page-about .about-fact__more {
  display: block;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 12px;
  line-height: 1.68;
  color: var(--ink-dim);
  transition: max-height .3s var(--ease), opacity .3s var(--ease), margin-top .3s var(--ease);
}

@media (max-width: 1023px) {
  .page-about .about-fact__more {
    max-height: 120px;
    opacity: 1;
    margin-top: 6px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-fact:hover .about-fact__more {
    max-height: 120px;
    opacity: 1;
    margin-top: 6px;
  }
}

/* ---------- 章节 ---------- */
.page-about .about-block {
  position: relative;
  padding: clamp(30px, 4.4vw, 58px) 0;
  overflow: hidden;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

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

.page-about .about-block + .about-block::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(255, 255, 255, .02), var(--rule) 14%, var(--rule) 78%, rgba(255, 255, 255, .02));
  transform: skewY(-1.1deg);
  transform-origin: left center;
  pointer-events: none;
}

.page-about .about-block--tint::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -10px;
  bottom: -10px;
  background: linear-gradient(180deg, rgba(11, 18, 38, .94), rgba(11, 18, 38, .18));
  transform: skewY(-1.4deg);
  z-index: 0;
  pointer-events: none;
}

.page-about .about-block--tint > * {
  position: relative;
  z-index: 1;
}

.page-about .about-block .section-title {
  margin: 10px 0 16px;
  font-size: clamp(25px, 3.8vw, 42px);
  font-weight: 300;
  line-height: 1.16;
  letter-spacing: -0.015em;
  text-shadow: 0 0 30px rgba(122, 77, 255, .22);
}

.page-about .about-block .lede {
  max-width: 66ch;
  margin: 0 0 clamp(22px, 3vw, 34px);
  color: var(--ink-dim);
  font-size: 16px;
  line-height: 1.86;
}

.page-about .about-body {
  max-width: 68ch;
  margin: 0;
  color: var(--ink-dim);
  font-size: 15.5px;
  line-height: 1.85;
}

.page-about .about-note {
  max-width: 72ch;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding-left: 14px;
  border-left: 1px solid rgba(255, 201, 107, .5);
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-dim);
}

.page-about .about-note a {
  color: var(--laser);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 225, 232, .35);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline__figure {
  margin: 0 0 clamp(26px, 3.6vw, 42px);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
}

.page-about .about-timeline__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(158deg, rgba(122, 77, 255, .28), transparent 52%, rgba(53, 225, 232, .18));
  pointer-events: none;
}

.page-about .about-timeline__figure img,
.page-about .about-split__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: clamp(20px, 3vw, 34px);
  margin-left: var(--shift, 0px);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 30%, #ffffff, var(--neon) 58%, var(--violet));
  box-shadow: 0 0 14px rgba(122, 77, 255, .8);
  transition: transform .22s var(--ease), box-shadow .22s var(--ease);
}

.page-about .about-timeline__item:hover::before {
  transform: scale(1.3);
  box-shadow: 0 0 22px rgba(122, 77, 255, 1), 0 0 0 5px rgba(122, 77, 255, .14);
}

.page-about .about-timeline__year {
  display: block;
  margin-bottom: 5px;
  font-family: var(--f-mono);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-about .about-timeline__item h3 {
  margin: 0 0 8px;
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.page-about .about-timeline__item p {
  margin: 0;
  max-width: 64ch;
  color: var(--ink-dim);
  font-size: 15.5px;
  line-height: 1.84;
}

@media (min-width: 768px) {
  .page-about .about-timeline__item:nth-child(1) { --shift: 0px; }
  .page-about .about-timeline__item:nth-child(2) { --shift: 26px; }
  .page-about .about-timeline__item:nth-child(3) { --shift: 52px; }
  .page-about .about-timeline__item:nth-child(4) { --shift: 78px; }
  .page-about .about-timeline__item:nth-child(5) { --shift: 104px; }
}

@media (min-width: 1200px) {
  .page-about .about-timeline__item:nth-child(2) { --shift: 34px; }
  .page-about .about-timeline__item:nth-child(3) { --shift: 68px; }
  .page-about .about-timeline__item:nth-child(4) { --shift: 102px; }
  .page-about .about-timeline__item:nth-child(5) { --shift: 136px; }
}

/* ---------- 三条业务线 ---------- */
.page-about .about-tracks {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}

@media (min-width: 820px) {
  .page-about .about-tracks {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-track h3 {
  margin: 0 0 10px;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
  font-size: clamp(17px, 1.7vw, 20px);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.page-about .about-track p {
  margin: 0;
  color: var(--ink-dim);
  font-size: 14.5px;
  line-height: 1.84;
}

/* ---------- 接入步骤 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.2vw, 24px);
}

@media (min-width: 720px) {
  .page-about .about-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-step {
  padding-top: 14px;
  border-top: 1px solid var(--rule);
}

.page-about .about-step__num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--neon);
}

.page-about .about-step h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
}

.page-about .about-step p {
  margin: 0;
  color: var(--ink-dim);
  font-size: 14.5px;
  line-height: 1.82;
}

/* ---------- 图文双栏 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
  align-items: center;
}

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-split--flip > :first-child {
    order: 2;
  }
}

.page-about .about-split__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-split__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(150deg, rgba(122, 77, 255, .24), transparent 56%);
  pointer-events: none;
}

.page-about .about-split__media--laser::after {
  background: linear-gradient(210deg, rgba(53, 225, 232, .24), transparent 58%);
}

.page-about .about-split__text p {
  margin: 0 0 1em;
  color: var(--ink-dim);
  font-size: 15.5px;
  line-height: 1.85;
}

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

/* ---------- 覆盖与用户结构 ---------- */
.page-about .about-coverage {
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
}

@media (min-width: 720px) {
  .page-about .about-coverage {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-coverage__item {
  padding-top: 16px;
  border-top: 1px solid var(--rule);
}

.page-about .about-coverage__num {
  display: block;
  font-family: var(--f-mono);
  font-size: clamp(26px, 3.6vw, 40px);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-shadow: 0 0 26px rgba(53, 225, 232, .32);
}

.page-about .about-coverage__unit {
  display: block;
  margin: 6px 0 10px;
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--gold);
}

.page-about .about-coverage__item p {
  margin: 0;
  color: var(--ink-dim);
  font-size: 14.5px;
  line-height: 1.8;
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  list-style: none;
  margin: 0 0 clamp(28px, 4vw, 42px);
  padding: 0;
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
}

.page-about .about-next li {
  padding-left: clamp(16px, 2.4vw, 24px);
  border-left: 2px solid rgba(122, 77, 255, .55);
}

.page-about .about-next li:nth-child(2) {
  border-left-color: rgba(53, 225, 232, .6);
}

.page-about .about-next li:nth-child(3) {
  border-left-color: rgba(255, 201, 107, .65);
}

.page-about .about-next h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
}

.page-about .about-next p {
  margin: 0;
  max-width: 68ch;
  color: var(--ink-dim);
  font-size: 15.5px;
  line-height: 1.84;
}

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

/* ---------- 揭示动效 ---------- */
.page-about [data-reveal].is-hidden {
  opacity: 0;
  transform: translateY(16px);
}

.page-about [data-reveal].is-in {
  opacity: 1;
  transform: none;
  transition: opacity .55s var(--ease), transform .55s var(--ease);
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal],
  .page-about [data-reveal].is-hidden {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .about-timeline__item::before {
    transition: none;
  }
}
<<<END>>>