.page-about {
  --about-gap: clamp(46px, 7vw, 86px);
  --about-tint: rgba(14, 24, 48, .55);
}

/* ── 首屏 ─────────────────────────────── */
.page-about .about-hero {
  padding-top: 4px;
}

.page-about .about-hero-top {
  display: grid;
  gap: 18px;
  padding: clamp(20px, 4vw, 46px) 0 clamp(24px, 4.5vw, 40px);
}

.page-about .about-hero-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .22em;
  color: var(--cyan);
}

.page-about .about-hero-title {
  margin: 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-size: clamp(28px, 6.2vw, 56px);
  line-height: 1.12;
  letter-spacing: -.015em;
  background: linear-gradient(104deg, var(--paper) 32%, var(--cyan) 76%, var(--neon) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-lede {
  margin: 0;
  max-width: 58ch;
  font-size: clamp(15.5px, 2.1vw, 18.5px);
  line-height: 1.82;
  color: var(--mist);
}

.page-about .about-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-fact {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--about-tint);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .03em;
  color: var(--dust);
}

.page-about .about-fact strong {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--cyan);
}

.page-about .about-hero-figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--nebula);
  box-shadow: var(--shadow-float);
}

.page-about .about-hero-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 7, 15, 0) 44%, rgba(5, 7, 15, .74) 100%);
  pointer-events: none;
}

.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

/* ── 通用区块 ─────────────────────────── */
.page-about .about-section {
  padding-top: var(--about-gap);
}

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

.page-about .about-section .section-title {
  margin-top: 10px;
  font-family: var(--font-display);
  font-size: clamp(23px, 4.4vw, 38px);
  line-height: 1.18;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .about-section .section-desc {
  margin-top: 12px;
  line-height: 1.82;
  color: var(--dust);
}

/* ── 发展历程时间轴 ───────────────────── */
.page-about .about-track {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0 0 0 clamp(16px, 4vw, 32px);
  border-left: 1px dashed var(--line-strong);
}

.page-about .about-node {
  position: relative;
  padding-bottom: clamp(26px, 4vw, 40px);
}

.page-about .about-node:last-child {
  padding-bottom: 0;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  top: 9px;
  left: calc(clamp(16px, 4vw, 32px) * -1 - 5px);
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 5px rgba(123, 92, 255, .14);
}

.page-about .about-node:nth-child(3n+2)::before {
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(47, 224, 208, .14);
}

.page-about .about-node:nth-child(3n+3)::before {
  background: var(--yellow);
  box-shadow: 0 0 0 5px rgba(245, 197, 24, .14);
}

.page-about .about-year {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: clamp(20px, 4.2vw, 30px);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--neon);
}

.page-about .about-node:nth-child(3n+2) .about-year {
  color: var(--cyan);
}

.page-about .about-node:nth-child(3n+3) .about-year {
  color: var(--yellow);
}

.page-about .about-node-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.6vw, 22px);
  line-height: 1.32;
  color: var(--paper);
}

.page-about .about-node-main p {
  margin: 10px 0 0;
  max-width: 62ch;
  line-height: 1.82;
  color: var(--dust);
}

.page-about .about-node-main .about-node-note {
  margin-top: 12px;
  padding: 11px 15px;
  border-left: 2px solid var(--line-strong);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(22, 50, 74, .42);
  font-size: 14.5px;
  color: var(--mist);
}

/* ── 数据来源 ─────────────────────────── */
.page-about .about-flow-body {
  display: grid;
  gap: clamp(22px, 4vw, 38px);
  margin-top: clamp(26px, 4vw, 42px);
}

.page-about .about-tabbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.page-about .about-tabbar .tab {
  padding: 8px 15px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: transparent;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--dust);
  cursor: pointer;
  transition: color .25s var(--ease), border-color .25s var(--ease), background .25s var(--ease);
}

.page-about .about-tabbar .tab:hover {
  color: var(--paper);
  border-color: var(--cyan);
}

.page-about .about-tabbar .tab[aria-selected="true"] {
  border-color: var(--cyan);
  background: var(--cyan);
  color: var(--void);
}

.page-about .about-sources .tab-panel {
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(152deg, rgba(14, 24, 48, .92), rgba(5, 7, 15, .62));
}

.page-about .about-sources .tab-panel[hidden] {
  display: none;
}

.page-about .about-sources .tab-panel h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--paper);
}

.page-about .about-sources .tab-panel p {
  margin: 0;
  line-height: 1.82;
  color: var(--dust);
}

.page-about .about-media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--nebula);
}

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

.page-about .about-media figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  background: rgba(5, 7, 15, .58);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--dust);
}

.page-about .about-paper {
  margin-top: clamp(26px, 4vw, 42px);
  padding: clamp(22px, 4vw, 34px);
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
}

.page-about .about-paper::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 6px;
  height: 100%;
  background: linear-gradient(180deg, var(--neon), var(--cyan));
}

.page-about .about-paper-tag {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: rgba(20, 22, 28, .55);
}

.page-about .about-paper h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.8vw, 24px);
  color: var(--ink);
}

.page-about .about-paper p:last-child {
  margin: 0;
  max-width: 64ch;
  line-height: 1.82;
  color: rgba(20, 22, 28, .82);
}

/* ── 团队 ─────────────────────────────── */
.page-about .about-crew {
  display: grid;
  gap: 16px;
  margin-top: clamp(26px, 4vw, 42px);
}

.page-about .about-crew-card {
  position: relative;
  padding: 24px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(165deg, rgba(22, 50, 74, .62), rgba(5, 7, 15, .44));
  overflow: hidden;
}

.page-about .about-crew-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--neon), var(--cyan));
}

.page-about .about-crew-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(38px, 8vw, 54px);
  line-height: 1;
  font-weight: 600;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-about .about-crew-role {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-crew-card p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--dust);
}

.page-about .about-crew-note {
  margin: 22px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--neon);
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--mist);
}

/* ── 合作 ─────────────────────────────── */
.page-about .about-partner-grid {
  display: grid;
  gap: clamp(24px, 4vw, 42px);
  align-items: center;
}

.page-about .about-partner-copy .section-title {
  margin: 10px 0 18px;
}

.page-about .about-partner-copy > p {
  margin: 0 0 14px;
  max-width: 58ch;
  line-height: 1.82;
  color: var(--dust);
}

.page-about .about-partner-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-partner-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--dust);
}

.page-about .about-partner-list b {
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 600;
  color: var(--cyan);
  white-space: nowrap;
}

.page-about .about-media--partner img {
  aspect-ratio: 14 / 9;
}

/* ── 价值主张 ─────────────────────────── */
.page-about .about-values {
  display: grid;
  gap: 16px;
  margin-top: clamp(26px, 4vw, 42px);
}

.page-about .about-value {
  padding: 24px 20px;
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: 0 18px 42px rgba(0, 0, 0, .45);
}

.page-about .about-value-mark {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--nightsea);
}

.page-about .about-value h3 {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .about-value p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(20, 22, 28, .78);
}

/* ── 接下来 ───────────────────────────── */
.page-about .about-next-grid {
  display: grid;
  gap: 18px;
  margin-top: clamp(26px, 4vw, 42px);
}

.page-about .about-iter {
  padding: 26px 22px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 110% at 100% 0%, rgba(123, 92, 255, .24), rgba(5, 7, 15, 0) 62%),
    var(--nebula);
}

.page-about .about-iter-cycle {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: clamp(30px, 6vw, 44px);
  line-height: 1;
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: -.01em;
}

.page-about .about-iter h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 19px;
  color: var(--paper);
}

.page-about .about-iter p:last-child {
  margin: 0;
  line-height: 1.82;
  color: var(--dust);
}

.page-about .about-next-lead {
  margin: 0 0 14px;
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--mist);
}

.page-about .about-next-list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-next-list a {
  display: block;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--neon);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--about-tint);
  font-size: 15px;
  line-height: 1.6;
  color: var(--mist);
  text-decoration: none;
  transition: border-color .25s var(--ease), color .25s var(--ease), transform .25s var(--ease);
}

.page-about .about-next-list a:hover {
  border-left-color: var(--cyan);
  color: var(--paper);
  transform: translateX(3px);
}

.page-about .about-actions {
  gap: 10px;
}

/* ── 桌面增强 ─────────────────────────── */
@media (min-width: 720px) {
  .page-about .about-crew {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 880px) {
  .page-about .about-node {
    display: grid;
    grid-template-columns: 130px minmax(0, 1fr);
    gap: 0 30px;
  }

  .page-about .about-year {
    margin-bottom: 0;
    padding-top: 2px;
    text-align: right;
    font-size: clamp(24px, 3vw, 32px);
  }
}

@media (min-width: 900px) {
  .page-about .about-flow-body {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }

  .page-about .about-partner-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.06fr);
  }

  .page-about .about-next-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  }
}

@media (hover: hover) {
  .page-about .about-node-main .about-node-note {
    opacity: .84;
    transition: opacity .3s var(--ease), border-color .3s var(--ease), transform .3s var(--ease);
  }

  .page-about .about-node:hover .about-node-note,
  .page-about .about-node:focus-within .about-node-note {
    opacity: 1;
    border-left-color: var(--neon);
    transform: translateX(3px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tabbar .tab,
  .page-about .about-next-list a,
  .page-about .about-node-main .about-node-note {
    transition: none;
  }
}
<<<END>>>