.page-about {
  --about-axis-w: 108px;
  --about-pause: clamp(56px, 9vw, 150px);
  --about-edge: 16px;
  color: var(--slate-200);
  background: var(--ink-900);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about a:focus-visible {
  outline: 2px solid var(--violet-300);
  outline-offset: 3px;
}

.page-about .about-kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--violet-300);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 5vw, 52px) 0 clamp(32px, 6vw, 72px);
  overflow: hidden;
  background:
    radial-gradient(120% 92% at 10% 104%, rgba(91, 75, 255, 0.42), rgba(7, 10, 24, 0) 62%),
    radial-gradient(74% 62% at 92% 4%, rgba(53, 214, 240, 0.16), rgba(7, 10, 24, 0) 60%),
    linear-gradient(158deg, var(--navy-800) 0%, var(--ink-900) 72%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(98deg, rgba(167, 155, 255, 0.05) 0 1px, transparent 1px 34px);
  opacity: 0.7;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
  box-sizing: border-box;
  display: grid;
  gap: clamp(22px, 4vw, 44px);
}

.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(16px, 3vw, 26px);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate-200);
}

.page-about .about-crumb__link {
  color: var(--violet-300);
  text-decoration: none;
}

.page-about .about-crumb__link:hover {
  color: var(--volt-400);
}

.page-about .about-crumb__sep {
  color: rgba(199, 206, 228, 0.45);
}

.page-about .about-crumb__now {
  color: var(--white);
}

.page-about .about-hero__title {
  margin: 0 0 clamp(14px, 2.4vw, 22px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(38px, 8vw, 82px);
  line-height: 0.94;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate-200);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
  margin: clamp(22px, 4vw, 34px) 0 0;
  padding: clamp(16px, 3vw, 22px) 0 0;
  list-style: none;
  border-top: 1px solid var(--rule);
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1;
  color: var(--white);
}

.page-about .about-fact__label {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: rgba(199, 206, 228, 0.78);
}

.page-about .about-hero__media {
  margin: 0;
  position: relative;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(0.88) contrast(1.06) brightness(0.94);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}

/* ---------- 长卷骨架 ---------- */
.page-about .about-scroll {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
  padding-bottom: var(--about-pause);
  box-sizing: border-box;
}

/* 年份刻度轴（移动端横向条） */
.page-about .about-axis {
  position: sticky;
  top: var(--bar-h);
  z-index: 4;
  margin-inline: calc(var(--gutter) * -1);
  padding: 10px var(--gutter);
  background: rgba(7, 10, 24, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
}

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

.page-about .about-axis__list {
  display: flex;
  gap: 18px;
  margin: 0;
  padding: 0 0 2px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-axis__item {
  flex: 0 0 auto;
}

.page-about .about-axis__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 2px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--slate-200);
  text-decoration: none;
  white-space: nowrap;
  transition: color 120ms var(--ease);
}

.page-about .about-axis__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--violet-300);
  transition: background 120ms var(--ease);
}

.page-about .about-axis__link:hover,
.page-about .about-axis__link:focus-visible {
  color: var(--volt-400);
}

.page-about .about-axis__link:hover .about-axis__dot,
.page-about .about-axis__link:focus-visible .about-axis__dot {
  background: var(--volt-400);
}

/* ---------- 章节 ---------- */
.page-about .about-body {
  min-width: 0;
}

.page-about .about-ch {
  margin-bottom: var(--about-pause);
  scroll-margin-top: calc(var(--bar-h) + 78px);
}

.page-about .about-ch:first-child {
  padding-top: clamp(30px, 5vw, 48px);
}

.page-about .about-h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(26px, 4.6vw, 40px);
  line-height: 1.26;
  color: var(--white);
}

.page-about .about-rule {
  display: block;
  width: 92px;
  height: 2px;
  margin: 18px 0 clamp(20px, 3vw, 30px);
  background: linear-gradient(90deg, var(--violet-600), var(--volt-400));
  transform: skewX(-8deg);
  transform-origin: left center;
}

.page-about .about-ch__body p {
  max-width: 62ch;
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--slate-200);
}

.page-about .about-ch__body p:last-of-type {
  margin-bottom: 0;
}

.page-about .about-card {
  margin: 24px 0;
  padding: 16px 18px;
  max-width: 58ch;
  background: linear-gradient(100deg, rgba(20, 29, 66, 0.95), rgba(14, 21, 51, 0.7));
  border-left: 3px solid var(--amber-400);
}

.page-about .about-card__tag {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber-400);
}

.page-about .about-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--white);
}

/* ---------- 团队色块 ---------- */
.page-about .about-team {
  display: grid;
  gap: 12px;
  margin: clamp(22px, 4vw, 34px) 0 clamp(22px, 4vw, 30px);
}

.page-about .about-team__cell {
  padding: 20px 18px 22px;
  background: rgba(14, 21, 51, 0.86);
  border-top: 2px solid var(--violet-600);
}

.page-about .about-team__cell--b {
  border-top-color: var(--amber-400);
  background: rgba(20, 29, 66, 0.7);
}

.page-about .about-team__cell--c {
  border-top-color: var(--cyan-400);
  background: rgba(14, 21, 51, 0.7);
}

.page-about .about-team__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 5vw, 42px);
  line-height: 1;
  color: var(--white);
}

.page-about .about-team__name {
  margin: 8px 0 0;
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--white);
}

.page-about .about-team__desc {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(199, 206, 228, 0.82);
}

/* ---------- 四步流程 ---------- */
.page-about .about-flow {
  display: grid;
  gap: 22px;
  margin: clamp(24px, 4vw, 34px) 0 clamp(22px, 4vw, 30px);
}

.page-about .about-flow__figure {
  margin: 0;
}

.page-about .about-flow__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.86) contrast(1.05) brightness(0.92);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 26px 100%, 0 calc(100% - 26px));
}

.page-about .about-flow__caption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: rgba(199, 206, 228, 0.7);
}

.page-about .about-flow__cards {
  display: grid;
  gap: 12px;
}

.page-about .about-flow__card {
  position: relative;
  padding: 18px 18px 20px;
  background: linear-gradient(180deg, rgba(20, 29, 66, 0.9), rgba(14, 21, 51, 0.9));
  border: 1px solid var(--rule);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: transform 120ms var(--ease), border-color 120ms var(--ease);
}

.page-about .about-flow__card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: var(--violet-600);
}

.page-about .about-flow__card::after {
  content: "";
  position: absolute;
  right: 16px;
  top: 18px;
  width: 26px;
  height: 2px;
  background: var(--volt-400);
  opacity: 0.55;
  transform: skewX(-8deg);
}

.page-about .about-flow__card:hover {
  transform: translateY(-2px);
}

.page-about .about-flow__card:hover::before {
  background: var(--volt-400);
}

.page-about .about-flow__step {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--violet-300);
}

.page-about .about-flow__card h3 {
  margin: 6px 0 8px;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--white);
}

.page-about .about-flow__card p:not(.about-flow__step) {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate-200);
}

/* ---------- 发展节点 ---------- */
.page-about .about-node__figure {
  margin: 0 0 clamp(22px, 4vw, 30px);
}

.page-about .about-node__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 8 / 3;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.05) brightness(0.9);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-timeline {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 18px 0 18px 20px;
  border-left: 1px solid var(--rule);
  scroll-margin-top: calc(var(--bar-h) + 88px);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 26px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--amber-400);
}

.page-about .about-timeline__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--amber-400);
}

.page-about .about-timeline__body h3 {
  margin: 4px 0 8px;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-timeline__body p {
  margin: 0 0 8px;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--slate-200);
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-reach {
  display: grid;
  gap: 12px;
  margin: clamp(22px, 4vw, 32px) 0 clamp(22px, 4vw, 30px);
}

.page-about .about-reach__item {
  padding: 16px 18px;
  background: rgba(14, 21, 51, 0.78);
  border: 1px solid var(--rule);
  border-bottom: 2px solid rgba(53, 214, 240, 0.55);
}

.page-about .about-reach__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1;
  color: var(--cyan-400);
}

.page-about .about-reach__text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate-200);
}

/* ---------- 服务承诺 ---------- */
.page-about .about-promise {
  display: grid;
  gap: 12px;
  margin: clamp(22px, 4vw, 30px) 0 20px;
}

.page-about .about-promise__cell {
  padding: 18px;
  background: var(--paper-100);
  color: var(--ink-900);
}

.page-about .about-promise__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(7, 10, 24, 0.6);
}

.page-about .about-promise__value {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.4vw, 28px);
  line-height: 1;
  color: var(--violet-600);
}

.page-about .about-promise__note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(7, 10, 24, 0.72);
}

/* ---------- 文本链接 ---------- */
.page-about .about-textlink {
  display: inline-block;
  margin-top: 6px;
  font-size: 14px;
  letter-spacing: 0.03em;
  color: var(--violet-300);
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color 120ms var(--ease);
}

.page-about .about-textlink:hover {
  color: var(--volt-400);
}

/* ---------- 结尾入口 ---------- */
.page-about .about-cta {
  margin-top: clamp(32px, 6vw, 64px);
  padding: clamp(24px, 4vw, 40px);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(91, 75, 255, 0.34), rgba(7, 10, 24, 0) 62%),
    linear-gradient(120deg, rgba(53, 214, 240, 0.12), rgba(14, 21, 51, 0.9));
  border: 1px solid rgba(167, 155, 255, 0.28);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-about .about-cta__title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(21px, 3.4vw, 28px);
  line-height: 1.35;
  color: var(--white);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate-200);
}

.page-about .about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-links a {
  display: inline-block;
  padding: 10px 16px;
  font-size: 14px;
  letter-spacing: 0.03em;
  color: var(--white);
  text-decoration: none;
  border: 1px solid rgba(167, 155, 255, 0.42);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: color 120ms var(--ease), border-color 120ms var(--ease), background 120ms var(--ease);
}

.page-about .about-links a:hover {
  color: var(--volt-400);
  border-color: var(--volt-400);
  background: rgba(59, 240, 140, 0.08);
}

/* ---------- 中等屏 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-team {
    grid-template-columns: 1.15fr 1fr 0.85fr;
    align-items: start;
  }

  .page-about .about-team__cell--b {
    padding-top: 28px;
  }

  .page-about .about-team__cell--c {
    padding-top: 38px;
  }

  .page-about .about-flow__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-reach {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-promise {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 桌面：左侧竖排刻度 + 右偏长卷 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    column-gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-hero__lead {
    font-size: 17px;
  }

  .page-about .about-scroll {
    display: grid;
    grid-template-columns: var(--about-axis-w) minmax(0, 1fr);
    column-gap: clamp(28px, 4vw, 60px);
    align-items: start;
    padding-top: clamp(36px, 5vw, 64px);
  }

  .page-about .about-axis {
    position: sticky;
    top: calc(var(--bar-h-slim) + 32px);
    align-self: start;
    margin: 0;
    padding: 0;
    background: transparent;
    backdrop-filter: none;
    border-bottom: 0;
  }

  .page-about .about-axis__cap {
    display: block;
    margin: 0 0 16px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.14em;
    color: var(--violet-300);
  }

  .page-about .about-axis__list {
    flex-direction: column;
    gap: 24px;
    overflow: visible;
    padding: 4px 0 4px 18px;
    position: relative;
  }

  .page-about .about-axis__list::before {
    content: "";
    position: absolute;
    left: 2px;
    top: 10px;
    bottom: 10px;
    width: 1px;
    background: linear-gradient(180deg, var(--violet-600), rgba(91, 75, 255, 0.06));
  }

  .page-about .about-axis__link {
    position: relative;
    font-size: 15px;
  }

  .page-about .about-axis__dot {
    position: absolute;
    left: -18px;
    top: 50%;
    transform: translateY(-50%);
  }

  .page-about .about-body {
    padding-right: clamp(0px, 2vw, 24px);
  }

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

  .page-about .about-ch__body p {
    font-size: 17px;
  }

  .page-about .about-flow {
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    column-gap: clamp(22px, 3vw, 40px);
    align-items: start;
  }

  .page-about .about-flow__figure {
    position: sticky;
    top: calc(var(--bar-h-slim) + 36px);
  }

  .page-about .about-reach {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: 86px minmax(0, 1fr);
    column-gap: 18px;
    padding: 22px 0 22px 24px;
  }

  .page-about .about-timeline__year {
    padding-top: 2px;
  }

  .page-about .about-node__figure img {
    aspect-ratio: 16 / 6;
  }
}

@media (min-width: 1100px) {
  .page-about .about-body {
    max-width: 940px;
  }

  .page-about .about-cta {
    padding: clamp(32px, 3.4vw, 48px);
  }
}
<<<PAGE_CSS_END>>>