.page-about {
  --about-panel-w: 252px;
  --about-gap: 28px;
  background: var(--void);
  color: var(--text);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-about .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--orange);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 28px 0 44px;
  border-bottom: 1px solid var(--hairline);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -160px;
  right: -120px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(46, 123, 255, 0.32) 0%, rgba(46, 123, 255, 0) 68%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 8px 8px;
  pointer-events: none;
}

.page-about .about-hero > .container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__title {
  margin: 0 0 18px;
  max-width: 22ch;
  font-size: 34px;
  line-height: 1.18;
  font-weight: 900;
  letter-spacing: 0.01em;
}

.page-about .about-hero__lead {
  margin: 0 0 28px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 40px;
  margin: 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--hairline);
  list-style: none;
}

.page-about .hstat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 150px;
}

.page-about .hstat__num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--cream);
}

.page-about .hstat__num em {
  margin-left: 4px;
  font-style: normal;
  font-size: 13px;
  font-weight: 400;
  color: var(--neon);
}

.page-about .hstat__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--steel);
}

/* ---------- 双栏骨架 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  padding: 32px 0 56px;
}

.page-about .index-panel {
  background: var(--cream);
  color: var(--brown);
  border-radius: var(--radius);
  padding: 14px 12px;
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.28);
}

.page-about .index-panel__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #8a7b6e;
}

.page-about .index-panel__list {
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .index-panel__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  font-size: 13px;
  color: var(--brown);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .index-panel__code {
  font-family: var(--font-mono);
  font-size: 11px;
  color: #9a8b7c;
}

.page-about .index-panel__link:hover,
.page-about .index-panel__link:focus-visible {
  border-bottom-color: rgba(255, 106, 43, 0.6);
}

.page-about .index-panel__link.is-active {
  border-bottom-color: var(--orange);
  background: rgba(42, 35, 32, 0.07);
}

.page-about .index-panel__link.is-active .index-panel__code {
  color: var(--orange);
}

/* ---------- 章节 ---------- */
.page-about .a-section {
  padding: 34px 0 6px;
  border-top: 1px solid var(--hairline);
}

.page-about .about-body > .a-section:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .a-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.page-about .a-section__code {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--blue-glow);
}

.page-about .a-section__title {
  margin: 0 0 16px;
  font-size: 24px;
  line-height: 1.3;
  font-weight: 900;
  letter-spacing: 0.01em;
}

.page-about .a-section__lead {
  margin: 0 0 24px;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .a-copy {
  margin: 0 0 16px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .a-note {
  margin: 20px 0 0;
  max-width: 68ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--steel);
}

.page-about .a-link {
  color: var(--blue-glow);
  text-decoration: none;
  border-bottom: 1px solid rgba(127, 178, 255, 0.45);
}

.page-about .a-link:hover,
.page-about .a-link:focus-visible {
  color: var(--cream);
  border-bottom-color: var(--cream);
}

/* ---------- 时间轴 ---------- */
.page-about .tl {
  position: relative;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 61px;
  top: 10px;
  bottom: 26px;
  width: 1px;
  background: linear-gradient(180deg, var(--blue) 0%, var(--blue-glow) 45%, var(--neon) 100%);
  opacity: 0.55;
}

.page-about .tl__item {
  position: relative;
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  column-gap: 20px;
  padding-bottom: 24px;
}

.page-about .tl__dot {
  position: absolute;
  left: 56px;
  top: 7px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 4px rgba(184, 255, 60, 0.12);
}

.page-about .tl__item.is-current .tl__dot {
  background: var(--neon);
  animation: about-pulse 1.2s var(--ease) 1;
}

.page-about .tl__year {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  text-align: right;
  color: var(--steel);
}

.page-about .tl__title {
  margin: 0 0 6px;
  font-size: 17px;
  line-height: 1.5;
  font-weight: 800;
}

.page-about .tl__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .tl__item:hover .tl__text,
.page-about .tl__item:focus-within .tl__text {
  color: var(--text);
}

@keyframes about-pulse {
  0% { box-shadow: 0 0 0 4px rgba(184, 255, 60, 0.12); }
  50% { box-shadow: 0 0 0 12px rgba(184, 255, 60, 0); }
  100% { box-shadow: 0 0 0 4px rgba(184, 255, 60, 0.12); }
}

/* ---------- 品牌主张块 ---------- */
.page-about .claim {
  position: relative;
  background: var(--cream);
  color: var(--brown);
  padding: 30px 24px;
  margin: 4px 0 26px;
  clip-path: polygon(0 0, 100% 14px, 100% 100%, 0 calc(100% - 14px));
}

.page-about .claim__en {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #a4562a;
}

.page-about .claim__cn {
  margin: 0;
  font-size: 25px;
  line-height: 1.3;
  font-weight: 900;
  letter-spacing: 0.02em;
}

/* ---------- 图文分栏 ---------- */
.page-about .a-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  align-items: start;
}

.page-about .a-split__text {
  min-width: 0;
}

.page-about .shot {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: var(--ink);
}

.page-about .shot img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .shot--3x2 { aspect-ratio: 3 / 2; }
.page-about .shot--16x9 { aspect-ratio: 16 / 9; }

.page-about .shot__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--cream);
  background: linear-gradient(180deg, rgba(10, 12, 16, 0) 0%, rgba(10, 12, 16, 0.82) 60%);
}

.page-about .a-section__figure {
  margin: 0 0 22px;
}

/* ---------- 事实清单 ---------- */
.page-about .facts {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--hairline);
}

.page-about .facts li {
  padding: 12px 0;
  border-bottom: 1px solid var(--hairline);
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .facts__k {
  display: inline-block;
  margin-right: 10px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--neon);
}

/* ---------- 三条产线 ---------- */
.page-about .lines {
  display: grid;
  gap: 12px;
}

.page-about .line {
  background: var(--ink);
  border: 1px solid var(--hairline);
  border-top-width: 3px;
  border-radius: var(--radius);
}

.page-about .line--blue { border-top-color: var(--blue); }
.page-about .line--orange { border-top-color: var(--orange); }
.page-about .line--neon { border-top-color: var(--neon); }

.page-about .line__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .line__code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

.page-about .line__name {
  font-size: 16px;
  font-weight: 800;
  color: var(--text);
}

.page-about .line__meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

.page-about .line__body {
  padding: 0 16px 16px;
}

.page-about .line__body ul {
  margin: 0;
  padding-left: 18px;
}

.page-about .line__body li {
  margin-bottom: 8px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
}

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

.page-about .line[open] .line__head {
  border-bottom: 1px solid var(--hairline);
  margin-bottom: 14px;
}

/* ---------- 指标 ---------- */
.page-about .legend {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-about .legend__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--neon);
}

.page-about .legend__code { color: var(--blue-glow); }

.page-about .metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .metric {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px 16px;
  background: var(--ink);
}

.page-about .metric__num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.05;
  color: var(--cream);
}

.page-about .metric__num small {
  margin-left: 5px;
  font-size: 13px;
  font-weight: 400;
  color: var(--steel);
}

.page-about .metric--neon .metric__num { color: var(--neon); }
.page-about .metric--blue .metric__num { color: var(--blue-glow); }
.page-about .metric--orange .metric__num { color: var(--orange); }

.page-about .metric__label {
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-dim);
}

/* ---------- 伙伴 ---------- */
.page-about .partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .partner {
  padding: 20px 18px;
  background: var(--ink);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
}

.page-about .partner__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--cream);
}

.page-about .partner__num small {
  margin-left: 4px;
  font-size: 13px;
  font-weight: 400;
  color: var(--orange);
}

.page-about .partner__name {
  margin: 12px 0 8px;
  font-size: 16px;
  font-weight: 800;
}

.page-about .partner__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ---------- 接下来 ---------- */
.page-about .next {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .next__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 16px 0;
  border-top: 1px solid var(--hairline);
}

.page-about .next__item:last-child {
  border-bottom: 1px solid var(--hairline);
}

.page-about .next__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .btn--primary {
  color: #06101f;
  background: linear-gradient(120deg, var(--blue-glow) 0%, var(--blue) 52%, var(--neon) 130%);
  box-shadow: 0 0 22px rgba(46, 123, 255, 0.35);
}

.page-about .btn--primary:hover,
.page-about .btn--primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(127, 178, 255, 0.55);
}

.page-about .btn--ghost {
  color: var(--text);
  border-color: var(--hairline);
  background: transparent;
}

.page-about .btn--ghost:hover,
.page-about .btn--ghost:focus-visible {
  border-color: var(--blue-glow);
  color: var(--cream);
}

/* ---------- 中屏 ---------- */
@media (min-width: 700px) {
  .page-about .a-split {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 30px;
  }

  .page-about .a-split--reverse {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
  }

  .page-about .a-split--reverse .a-split__media { order: -1; }

  .page-about .metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .next__item {
    grid-template-columns: 96px minmax(0, 1fr);
    align-items: start;
    gap: 16px;
  }

  .page-about .next__item .tag {
    justify-self: start;
  }
}

/* ---------- 桌面双栏 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero {
    padding: 44px 0 56px;
  }

  .page-about .about-hero__title {
    font-size: 52px;
    max-width: 20ch;
  }

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

  .page-about .about-layout {
    grid-template-columns: var(--about-panel-w) minmax(0, 1fr);
    gap: 52px;
    padding: 44px 0 72px;
  }

  .page-about .about-index {
    position: sticky;
    top: 88px;
  }

  .page-about .index-panel {
    padding: 20px 16px;
  }

  .page-about .index-panel__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .index-panel__link {
    white-space: normal;
    border-bottom: 0;
    border-left: 2px solid transparent;
    padding: 9px 8px;
    font-size: 14px;
  }

  .page-about .index-panel__link.is-active {
    border-bottom-color: transparent;
    border-left-color: var(--orange);
    background: rgba(42, 35, 32, 0.07);
  }

  .page-about .index-panel__link:hover,
  .page-about .index-panel__link:focus-visible {
    border-left-color: rgba(255, 106, 43, 0.55);
  }

  .page-about .a-section {
    padding: 44px 0 10px;
  }

  .page-about .a-section__title {
    font-size: 32px;
  }

  .page-about .claim {
    padding: 40px 36px;
    margin-bottom: 32px;
  }

  .page-about .claim__cn {
    font-size: 34px;
  }

  .page-about .metric__num {
    font-size: 36px;
  }

  .page-about .partner__num {
    font-size: 42px;
  }
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .page-about .btn--primary:hover,
  .page-about .btn--primary:focus-visible {
    transform: none;
  }
}
<<<END>>>