.page-about {
  --ab-rail-w: 108px;
  --ab-line: rgba(17, 20, 43, 0.14);
  --ab-line-dark: rgba(57, 242, 224, 0.20);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .about-sec {
  padding-block: clamp(56px, 8vw, 112px);
  position: relative;
}

.page-about .about-sec--paper {
  background: var(--paper);
  color: var(--ink-soft);
}

.page-about .about-sec--dark {
  background:
    radial-gradient(circle at 88% 6%, rgba(43, 27, 94, 0.92), transparent 58%),
    var(--space);
  color: rgba(247, 244, 238, 0.82);
}

.page-about .about-sec--dark h2,
.page-about .about-sec--dark h3,
.page-about .about-sec--dark .sec-head__title {
  color: var(--paper);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  background: var(--space);
  padding-top: 84px;
  padding-bottom: 4px;
}

.page-about .breadcrumbs__link {
  color: var(--mist);
}

.page-about .breadcrumbs__link:hover {
  color: var(--amber);
}

.page-about .breadcrumbs__sep,
.page-about .breadcrumbs__current {
  color: rgba(247, 244, 238, 0.62);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background:
    radial-gradient(circle at 82% 14%, rgba(43, 27, 94, 0.95), transparent 56%),
    var(--space);
  color: var(--paper);
  padding-block: clamp(28px, 4vw, 56px) clamp(60px, 9vw, 120px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(57, 242, 224, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(57, 242, 224, 0.07) 1px, transparent 1px);
  background-size: 88px 88px;
  pointer-events: none;
  mask-image: radial-gradient(circle at 70% 40%, #000 0%, transparent 72%);
  -webkit-mask-image: radial-gradient(circle at 70% 40%, #000 0%, transparent 72%);
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(36px, 6vw, 64px);
  align-items: center;
}

.page-about .about-hero__kicker {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 0 0 20px;
}

.page-about .about-hero__title {
  margin: 0 0 26px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6vw, 68px);
  line-height: 1.04;
  letter-spacing: -0.02em;
}

.page-about .about-hero__line {
  display: block;
}

.page-about .about-hero__line--accent {
  font-style: normal;
  color: var(--tiger);
  transform: skewX(-2deg);
  transform-origin: left bottom;
}

.page-about .about-hero__lede {
  max-width: 56ch;
  margin: 0 0 32px;
  font-size: var(--step-body);
  line-height: 1.78;
  color: rgba(247, 244, 238, 0.80);
}

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

.page-about .about-hero__visual {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.page-about .about-hero__orbit {
  width: min(100%, 420px);
  height: auto;
  display: block;
}

.page-about .about-hero__coord {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mist);
  margin: 0;
}

/* ---------- 通用区块标题 ---------- */
.page-about .sec-head {
  max-width: 78ch;
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-about .sec-head__index {
  display: inline-block;
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--tiger);
}

.page-about .about-sec--dark .sec-head__index {
  color: var(--amber);
}

.page-about .sec-head__title {
  margin: 0;
  font-size: clamp(26px, 4vw, 46px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .sec-head__lede {
  margin: 18px 0 0;
  font-size: var(--step-body);
  line-height: 1.8;
  max-width: 62ch;
}

/* ---------- 品牌起点 ---------- */
.page-about .origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}

.page-about .origin-copy p {
  margin: 0 0 18px;
  font-size: var(--step-body);
  line-height: 1.82;
}

.page-about .origin-copy p:first-child {
  font-size: clamp(17px, 1.7vw, 20px);
  color: var(--ink);
}

.page-about .origin-points {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--ab-line);
}

.page-about .origin-points li {
  border-bottom: 1px solid var(--ab-line);
  padding: 15px 0 15px 2px;
  font-size: 15px;
  line-height: 1.72;
}

.page-about .origin-points b {
  display: inline-block;
  min-width: 68px;
  margin-right: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--tiger);
}

.page-about .origin-fig {
  margin: 0;
  position: relative;
  border: 1px solid var(--ab-line);
  background: var(--nebula);
  overflow: hidden;
}

.page-about .origin-fig::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--tiger), var(--amber), transparent);
}

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

.page-about .origin-fig__caption {
  display: block;
  padding: 12px 14px;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
  background: var(--space);
  border-top: 1px solid rgba(57, 242, 224, 0.16);
}

/* ---------- 六个板块 ---------- */
.page-about .six-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
}

.page-about .six-item {
  border-top: 1px solid var(--ab-line-dark);
  padding: 24px 0 26px;
}

.page-about .six-item__num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--amber);
  margin-bottom: 10px;
}

.page-about .six-item__title {
  margin: 0 0 10px;
  font-size: clamp(19px, 2vw, 23px);
  font-weight: 900;
  line-height: 1.3;
}

.page-about .six-item__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(247, 244, 238, 0.74);
}

.page-about .six-item:hover .six-item__title {
  color: var(--tiger);
  transition: color var(--dur) var(--ease);
}

/* ---------- 团队 ---------- */
.page-about .team-fig {
  margin: 0 0 clamp(24px, 4vw, 40px);
  border: 1px solid var(--ab-line);
  overflow: hidden;
  position: relative;
}

.page-about .team-fig::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(11, 18, 48, 0.55));
  pointer-events: none;
  z-index: 1;
}

.page-about .team-fig img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 320px;
  object-fit: cover;
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ab-line);
  border: 1px solid var(--ab-line);
}

.page-about .team-cell {
  background: var(--paper);
  padding: 22px 16px 24px;
  transition: background var(--dur) var(--ease);
}

.page-about .team-cell:hover {
  background: rgba(255, 106, 26, 0.06);
}

.page-about .team-cell--total {
  background: var(--space);
  color: var(--paper);
}

.page-about .team-cell--total:hover {
  background: var(--space-2);
}

.page-about .team-cell__num {
  display: block;
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--tiger);
}

.page-about .team-cell--total .team-cell__num {
  color: var(--amber);
}

.page-about .team-cell__name {
  margin: 12px 0 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .team-cell--total .team-cell__name {
  color: var(--paper);
}

.page-about .team-cell__desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.66;
  color: var(--ink-soft);
}

.page-about .team-cell--total .team-cell__desc {
  color: rgba(247, 244, 238, 0.72);
}

.page-about .review-steps {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .review-steps li {
  border-left: 2px solid var(--tiger);
  padding: 6px 0 6px 14px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .review-steps .mono {
  display: inline-block;
  margin-right: 10px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--tiger);
}

/* ---------- 版本演进 ---------- */
.page-about .version-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 48px);
}

.page-about .year-rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

.page-about .year-rail__link {
  flex: 0 0 auto;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--mist);
  text-decoration: none;
  padding: 8px 14px;
  border: 1px solid rgba(247, 244, 238, 0.16);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .year-rail__link:hover,
.page-about .year-rail__link:focus-visible {
  color: var(--space);
  background: var(--amber);
  border-color: var(--amber);
  outline: none;
}

.page-about:has(#mile-2016:target) .year-rail__link[href="#mile-2016"],
.page-about:has(#mile-2019:target) .year-rail__link[href="#mile-2019"],
.page-about:has(#mile-2022:target) .year-rail__link[href="#mile-2022"],
.page-about:has(#mile-2025:target) .year-rail__link[href="#mile-2025"] {
  color: var(--space);
  background: var(--tiger);
  border-color: var(--tiger);
}

.page-about .orbit {
  position: relative;
  width: min(100%, 420px);
  aspect-ratio: 1 / 1;
  margin: 0 auto clamp(28px, 4vw, 44px);
}

.page-about .orbit__rings {
  display: block;
  width: 100%;
  height: 100%;
}

.page-about .orbit__node {
  position: absolute;
  left: var(--x);
  top: var(--y);
  transform: translate(-50%, -50%);
  font-size: 12px;
  letter-spacing: 0.06em;
  padding: 5px 9px;
  color: var(--paper);
  background: var(--space-2);
  border: 1px solid rgba(57, 242, 224, 0.28);
  cursor: default;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .orbit__node--live {
  background: var(--tiger);
  border-color: var(--tiger);
  color: var(--space);
  font-weight: 700;
}

.page-about .orbit__node:hover,
.page-about .orbit__node:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--space);
  outline: none;
}

.page-about .orbit__node--live:hover,
.page-about .orbit__node--live:focus-visible {
  color: var(--space);
  background: var(--amber);
  border-color: var(--amber);
}

.page-about .orbit__node::after {
  content: attr(data-tip);
  position: absolute;
  left: 50%;
  bottom: calc(100% + 9px);
  transform: translateX(-50%);
  width: max-content;
  max-width: 190px;
  padding: 7px 10px;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--amber);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--dur) var(--ease), visibility var(--dur) var(--ease);
  z-index: 3;
}

.page-about .orbit__node:hover::after,
.page-about .orbit__node:focus-visible::after {
  opacity: 1;
  visibility: visible;
}

.page-about .mile-list {
  list-style: none;
  margin: 0 0 clamp(32px, 5vw, 56px);
  padding: 0;
  border-left: 1px solid rgba(57, 242, 224, 0.22);
}

.page-about .mile {
  position: relative;
  padding: 4px 0 26px 22px;
  scroll-margin-top: 120px;
  transition: background var(--dur) var(--ease);
}

.page-about .mile::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 12px;
  width: 7px;
  height: 7px;
  background: var(--mist);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .mile:target::before {
  background: var(--tiger);
  box-shadow: 0 0 0 4px rgba(255, 106, 26, 0.18);
}

.page-about .mile__year {
  display: block;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--amber);
  margin-bottom: 6px;
}

.page-about .mile__title {
  margin: 0 0 8px;
  font-size: clamp(18px, 1.9vw, 22px);
  font-weight: 900;
  line-height: 1.34;
}

.page-about .mile__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(247, 244, 238, 0.74);
}

/* ---------- V4 面板 ---------- */
.page-about .v4-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border: 1px solid rgba(57, 242, 224, 0.22);
  background: rgba(20, 27, 66, 0.62);
}

.page-about .v4-fig {
  margin: 0;
  overflow: hidden;
  background: var(--nebula);
}

.page-about .v4-fig img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 300px;
  object-fit: cover;
}

.page-about .v4-copy {
  padding: clamp(22px, 3vw, 34px);
}

.page-about .v4-copy__title {
  margin: 14px 0 12px;
  font-size: clamp(19px, 2.1vw, 24px);
  font-weight: 900;
  line-height: 1.32;
}

.page-about .v4-copy p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(247, 244, 238, 0.76);
}

.page-about .v4-list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .v4-list li {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(247, 244, 238, 0.78);
  padding-left: 14px;
  position: relative;
}

.page-about .v4-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 1px;
  background: var(--tiger);
}

.page-about .v4-list .mono {
  color: var(--amber);
  font-size: 13px;
  letter-spacing: 0.04em;
}

/* ---------- 合作生态 ---------- */
.page-about .eco-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}

.page-about .eco-copy p {
  margin: 0 0 18px;
  font-size: var(--step-body);
  line-height: 1.82;
}

.page-about .eco-facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--ab-line);
  border: 1px solid var(--ab-line);
}

.page-about .eco-facts li {
  background: var(--paper);
  padding: 16px 16px 17px;
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .eco-facts__num {
  flex: 0 0 auto;
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--tiger);
}

.page-about .eco-facts__unit {
  font-size: 14px;
  margin-left: 2px;
}

.page-about .eco-facts__k {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-soft);
}

.page-about .eco-map {
  border: 1px solid var(--ab-line);
  background: linear-gradient(160deg, rgba(43, 27, 94, 0.08), rgba(255, 194, 75, 0.10));
  padding: clamp(16px, 3vw, 28px);
}

.page-about .eco-map__svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .eco-node circle {
  transition: r 180ms var(--ease), fill 180ms var(--ease);
}

.page-about .eco-node:hover circle,
.page-about .eco-node:focus-visible circle {
  fill: var(--tiger);
}

.page-about .eco-node:focus {
  outline: none;
}

/* ---------- 工作方式 ---------- */
.page-about .habit-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-about .habit {
  border-top: 1px solid var(--ab-line-dark);
  padding: 22px 0 24px;
}

.page-about .habit__mark {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  margin-bottom: 10px;
}

.page-about .habit__title {
  margin: 0 0 8px;
  font-size: clamp(17px, 1.8vw, 21px);
  font-weight: 900;
  line-height: 1.34;
}

.page-about .habit__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(247, 244, 238, 0.74);
}

/* ---------- 下一步 ---------- */
.page-about .next-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .next-card {
  display: block;
  padding: 24px 22px 22px;
  border: 1px solid var(--ab-line);
  background: var(--paper);
  text-decoration: none;
  color: var(--ink);
  position: relative;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .next-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 34px;
  height: 2px;
  background: var(--tiger);
  transition: width var(--dur) var(--ease);
}

.page-about .next-card:hover,
.page-about .next-card:focus-visible {
  border-color: var(--cyan);
  background: rgba(57, 242, 224, 0.06);
  transform: translateY(-4px);
  outline: none;
}

.page-about .next-card:hover::before,
.page-about .next-card:focus-visible::before {
  width: 100%;
  background: var(--cyan);
}

.page-about .next-card__mark {
  display: block;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
  margin-bottom: 14px;
}

.page-about .next-card__title {
  margin: 0 0 10px;
  font-size: clamp(19px, 2vw, 23px);
  font-weight: 900;
  line-height: 1.3;
}

.page-about .next-card__text {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ink-soft);
}

.page-about .next-card__go {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--tiger);
}

.page-about .next-note {
  margin: clamp(24px, 3vw, 34px) 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .next-note__link {
  color: var(--tiger);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .next-note__link:hover {
  color: var(--tiger-deep);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .review-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .review-steps li {
    border-left: none;
    border-top: 2px solid var(--tiger);
    padding: 14px 0 0;
  }

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

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

  .page-about .habit-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 3vw, 40px);
  }
}

@media (min-width: 900px) {
  .page-about .breadcrumbs {
    padding-top: 96px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .origin-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .six-list {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: var(--gap);
  }

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

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

  .page-about .six-item:nth-child(3) {
    grid-column: 1 / span 5;
  }

  .page-about .six-item:nth-child(4) {
    grid-column: 6 / span 7;
  }

  .page-about .six-item:nth-child(5) {
    grid-column: 1 / span 6;
  }

  .page-about .six-item:nth-child(6) {
    grid-column: 7 / span 6;
  }

  .page-about .version-layout {
    grid-template-columns: var(--ab-rail-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .year-rail {
    position: sticky;
    top: 104px;
    flex-direction: column;
    overflow: visible;
    border-left: 1px solid rgba(57, 242, 224, 0.26);
    padding: 0 0 0 16px;
    gap: 4px;
  }

  .page-about .year-rail__link {
    border: 1px solid transparent;
    padding: 8px 10px;
    text-align: left;
  }

  .page-about .version-body {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    column-gap: clamp(28px, 4vw, 48px);
    align-items: start;
  }

  .page-about .orbit {
    grid-column: 2;
    grid-row: 1;
    margin: 0 0 clamp(28px, 4vw, 40px);
  }

  .page-about .mile-list {
    grid-column: 1;
    grid-row: 1 / span 2;
    margin-bottom: 0;
  }

  .page-about .v4-panel {
    grid-column: 2;
    grid-row: 2;
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .eco-layout {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }

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

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

@media (min-width: 1180px) {
  .page-about .v4-panel {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .v4-fig img {
    max-height: 100%;
    height: 100%;
    min-height: 240px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .next-card,
  .page-about .team-cell,
  .page-about .orbit__node,
  .page-about .year-rail__link {
    transition: none;
  }

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

.page-about {
  --x: inherit;
  --y: inherit;
}