.page-about {
  --about-rail-top: 108px;
  --about-pad: clamp(48px, 8vw, 96px);
  background: var(--ink-900);
  color: var(--light-100);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(26px, 4.5vw, 52px) 0 clamp(40px, 6vw, 76px);
  border-bottom: 1px solid var(--steel-600);
  background:
    radial-gradient(110% 82% at 94% 2%, rgba(56, 225, 210, .13), transparent 58%),
    radial-gradient(92% 72% at -8% 100%, rgba(255, 122, 84, .10), transparent 62%);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(20px, 3.5vw, 36px);
}

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

.page-about h1 {
  margin: 0 0 18px;
  font-family: var(--font-sans);
  font-size: clamp(32px, 6.4vw, 60px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -.02em;
}

.page-about .about-lede {
  margin: 0 0 24px;
  max-width: 34em;
  font-size: clamp(16px, 2.1vw, 19px);
  line-height: 1.82;
  color: var(--mist-400);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: clamp(22px, 3vw, 32px);
}

.page-about .about-hero-meta {
  display: grid;
  gap: 14px;
  margin: 0;
  padding-top: 18px;
  border-top: 1px solid var(--steel-600);
}

.page-about .about-hero-meta div {
  display: grid;
  gap: 4px;
}

.page-about .about-hero-meta dt {
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--amber);
}

.page-about .about-hero-meta dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--light-100);
}

.page-about .about-hero-figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 2px solid var(--steel-600);
  border-radius: var(--radius);
  background: var(--ink-700);
  box-shadow: var(--shadow-hard);
}

.page-about .about-hero-figure::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--neon-cyan), rgba(56, 225, 210, 0) 72%);
  pointer-events: none;
}

.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .about-hero-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--steel-600);
  background: var(--ink-800);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--mist-400);
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding: var(--about-pad) 0;
}

.page-about .about-sec-head {
  max-width: 46ch;
}

.page-about .about-num {
  display: inline-block;
  margin: 0 0 16px;
  padding: 3px 9px;
  border: 1px solid var(--steel-600);
  border-radius: var(--radius);
  background: var(--ink-700);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--amber);
}

.page-about .about-h2 {
  margin: 0 0 14px;
  font-family: var(--font-sans);
  font-size: clamp(23px, 3.6vw, 36px);
  font-weight: 900;
  line-height: 1.24;
  letter-spacing: -.01em;
}

.page-about .about-sum {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist-400);
}

.page-about .about-body p,
.page-about .about-archive-body > p,
.page-about .about-partners-body > p {
  margin: 0 0 18px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--light-100);
}

.page-about .about-origin-grid {
  display: grid;
  gap: clamp(22px, 3.5vw, 40px);
}

.page-about .about-quote {
  margin: 26px 0;
  padding: 4px 0 4px 20px;
  border-left: 4px solid var(--neon-cyan);
  font-size: clamp(17px, 2.2vw, 21px);
  font-weight: 500;
  line-height: 1.85;
  color: var(--light-100);
}

/* ---------- 年份刻度 ---------- */
.page-about .about-timeline {
  padding: var(--about-pad) 0;
  border-top: 1px solid var(--steel-600);
  border-bottom: 1px solid var(--steel-600);
  background: linear-gradient(180deg, var(--ink-900) 0%, var(--ink-800) 52%, var(--ink-900) 100%);
}

.page-about .about-timeline-grid {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  margin-top: clamp(24px, 3.6vw, 42px);
}

.page-about .about-rail {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail::-webkit-scrollbar {
  height: 0;
}

.page-about .about-rail-item {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--steel-600);
  border-radius: var(--radius);
  background: var(--ink-700);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist-400);
  text-decoration: none;
  transition: color .18s var(--ease-hall), border-color .18s var(--ease-hall), background .18s var(--ease-hall);
}

.page-about .about-rail-item::before {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border: 1px solid currentColor;
  transform: rotate(45deg);
  transition: background .18s var(--ease-hall);
}

.page-about .about-rail-item:hover,
.page-about .about-rail-item:focus-visible {
  color: var(--neon-cyan);
  border-color: var(--neon-cyan);
  background: var(--ink-800);
}

.page-about .about-rail-item:hover::before,
.page-about .about-rail-item:focus-visible::before {
  background: var(--neon-cyan);
}

.page-about .about-year {
  scroll-margin-top: calc(var(--about-rail-top) + 28px);
  padding: clamp(20px, 3vw, 30px);
  border: 2px solid var(--steel-600);
  border-radius: var(--radius);
  background: var(--ink-700);
  box-shadow: var(--shadow-hard);
}

.page-about .about-year + .about-year {
  margin-top: clamp(16px, 2.4vw, 24px);
}

.page-about .about-year-side {
  margin-bottom: 12px;
}

.page-about .about-year-mark {
  margin: 0;
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .03em;
  color: var(--neon-cyan);
}

.page-about .about-year-tag {
  margin: 8px 0 0;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mist-400);
}

.page-about .about-year-body h3 {
  margin: 0 0 10px;
  font-family: var(--font-sans);
  font-size: clamp(18px, 2.2vw, 21px);
  font-weight: 700;
  line-height: 1.4;
}

.page-about .about-year-body p {
  margin: 0;
  font-size: 16px;
  line-height: 1.82;
  color: var(--light-100);
}

/* ---------- 三条业务线 ---------- */
.page-about .about-lines {
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
  margin-top: clamp(26px, 4vw, 42px);
}

.page-about .about-line {
  position: relative;
  padding: clamp(20px, 3vw, 30px);
  border: 2px solid var(--steel-600);
  border-radius: var(--radius);
  background: var(--ink-700);
  box-shadow: var(--shadow-hard);
}

.page-about .about-line:nth-child(2) {
  background: linear-gradient(155deg, var(--violet-slate) 0%, var(--ink-700) 78%);
}

.page-about .about-line-index {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--amber);
}

.page-about .about-line h3 {
  margin: 0 0 10px;
  font-family: var(--font-sans);
  font-size: clamp(18px, 2.3vw, 22px);
  font-weight: 700;
  line-height: 1.36;
}

.page-about .about-line p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--light-100);
}

.page-about .about-line-link {
  display: inline-block;
  font-size: 14px;
  color: var(--neon-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 225, 210, .42);
  padding-bottom: 2px;
  transition: border-color .18s var(--ease-hall), color .18s var(--ease-hall);
}

.page-about .about-line-link:hover,
.page-about .about-line-link:focus-visible {
  color: var(--light-100);
  border-color: var(--light-100);
}

/* ---------- 资料检索 ---------- */
.page-about .about-archive {
  background: var(--ink-800);
  border-top: 1px solid var(--steel-600);
  border-bottom: 1px solid var(--steel-600);
}

.page-about .about-archive-grid {
  display: grid;
  gap: clamp(24px, 3.6vw, 44px);
}

.page-about .about-figure {
  margin: 0;
  border: 2px solid var(--steel-600);
  border-radius: var(--radius);
  background: var(--ink-700);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--steel-600);
  background: var(--ink-900);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--mist-400);
}

.page-about .about-steps {
  margin: 24px 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .about-steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px;
  border: 1px solid var(--steel-600);
  border-radius: var(--radius);
  background: var(--ink-700);
}

.page-about .about-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: 1px solid var(--coral);
  border-radius: var(--radius);
  font-size: 12px;
  color: var(--coral);
}

.page-about .about-steps p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--light-100);
}

/* ---------- 数据条带 ---------- */
.page-about .about-band {
  padding: clamp(26px, 4vw, 42px) 0;
  border-bottom: 1px solid var(--steel-600);
  background: linear-gradient(90deg, var(--ink-700) 0%, var(--violet-slate) 58%, var(--ink-800) 100%);
}

.page-about .about-band-track {
  display: flex;
  gap: clamp(20px, 3.5vw, 40px);
  overflow-x: auto;
  padding-bottom: 10px;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-band-item {
  flex: 0 0 auto;
  min-width: 132px;
  padding-right: clamp(20px, 3.5vw, 40px);
  border-right: 1px solid var(--steel-600);
  scroll-snap-align: start;
}

.page-about .about-band-item:last-child {
  border-right: 0;
  padding-right: 0;
}

.page-about .about-band-num {
  display: block;
  font-size: clamp(30px, 4.6vw, 46px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--light-100);
}

.page-about .about-band-num::after {
  content: "";
  display: inline-block;
  width: 9px;
  height: 9px;
  margin-left: 8px;
  background: var(--amber);
  vertical-align: 8px;
}

.page-about .about-band-unit {
  font-size: .46em;
  margin-left: 3px;
  color: var(--mist-400);
}

.page-about .about-band-label {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mist-400);
}

/* ---------- 团队 ---------- */
.page-about .about-team-grid {
  display: grid;
  gap: clamp(24px, 3.6vw, 44px);
}

.page-about .about-team-list {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-team-list li {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 16px;
  border: 1px solid var(--steel-600);
  border-radius: var(--radius);
  background: var(--ink-700);
}

.page-about .about-team-num {
  grid-row: span 2;
  font-size: 24px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--amber);
  align-self: center;
}

.page-about .about-team-role {
  font-size: 16px;
  font-weight: 700;
  color: var(--light-100);
}

.page-about .about-team-desc {
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist-400);
}

/* ---------- 资质 ---------- */
.page-about .about-cred {
  border-top: 1px solid var(--steel-600);
}

.page-about .about-cred-list {
  margin: clamp(24px, 3.6vw, 40px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 16px;
}

.page-about .about-cred-item {
  position: relative;
  padding: clamp(18px, 2.6vw, 26px);
  padding-top: clamp(26px, 3.4vw, 34px);
  border: 1px solid var(--steel-600);
  border-radius: var(--radius);
  background: var(--ink-700);
}

.page-about .about-cred-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 46px;
  height: 3px;
  background: var(--neon-cyan);
}

.page-about .about-cred-title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--light-100);
}

.page-about .about-cred-item p + p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist-400);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  background: var(--ink-800);
  border-top: 1px solid var(--steel-600);
}

.page-about .about-partners-grid {
  display: grid;
  gap: clamp(24px, 3.6vw, 44px);
}

.page-about .about-partners-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-partner-types {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-partner-types li {
  padding: clamp(16px, 2.4vw, 22px);
  border: 2px solid var(--steel-600);
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--ink-700) 0%, var(--violet-slate) 100%);
}

.page-about .about-type-index {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--amber);
}

.page-about .about-type-name {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--light-100);
}

.page-about .about-partner-types li p + p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist-400);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: clamp(36px, 6vw, 64px) 0;
  background: linear-gradient(180deg, var(--ink-900) 0%, var(--ink-800) 100%);
  border-top: 1px solid var(--neon-cyan);
}

.page-about .about-cta-inner {
  display: grid;
  gap: 18px;
}

.page-about .about-cta-text {
  margin: 0;
  font-size: clamp(18px, 2.4vw, 24px);
  font-weight: 700;
  line-height: 1.55;
  color: var(--light-100);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero-meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }

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

@media (min-width: 900px) {
  .page-about .about-year {
    display: grid;
    grid-template-columns: 132px minmax(0, 1fr);
    gap: clamp(16px, 2.4vw, 32px);
  }

  .page-about .about-year-side {
    margin-bottom: 0;
    border-right: 1px solid var(--steel-600);
    padding-right: 16px;
  }

  .page-about .about-cta-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 940px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: end;
  }

  .page-about .about-origin-grid {
    grid-template-columns: minmax(0, 34fr) minmax(0, 66fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-timeline-grid {
    grid-template-columns: 148px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: var(--about-rail-top);
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--steel-600);
  }

  .page-about .about-rail-item {
    position: relative;
    border: 0;
    background: none;
    border-radius: 0;
    padding: 14px 0 14px 20px;
    justify-content: flex-start;
  }

  .page-about .about-rail-item::before {
    position: absolute;
    left: -5px;
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
    background: var(--ink-800);
  }

  .page-about .about-lines {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-about .about-line:nth-child(1) {
    grid-column: 1 / span 7;
  }

  .page-about .about-line:nth-child(2) {
    grid-column: 8 / span 5;
  }

  .page-about .about-line:nth-child(3) {
    grid-column: 3 / span 8;
  }

  .page-about .about-archive-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-about .about-team-list li {
    grid-template-columns: 64px minmax(0, 1fr);
  }

  .page-about .about-partners-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-about .about-band-track {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    overflow: visible;
    scroll-snap-type: none;
    padding-bottom: 0;
  }

  .page-about .about-band-item {
    min-width: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail-item,
  .page-about .about-line-link,
  .page-about .about-hero-figure::before {
    transition: none;
  }
}
<<<END>>>