.page-about {
  --about-axis: 88px;
  background: var(--abyss);
  color: var(--fog);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 5vw, 48px) 0 clamp(28px, 5vw, 56px);
  border-bottom: 1px solid var(--hair);
  background:
    radial-gradient(90% 130% at 92% -10%, rgba(51, 224, 198, 0.10), transparent 62%),
    linear-gradient(180deg, var(--panel) 0%, var(--abyss) 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(90deg, rgba(233, 240, 245, 0.06) 0 1px, transparent 1px 56px);
  opacity: 0.5;
}

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

.page-about .index-label {
  margin: 26px 0 14px;
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  font-size: clamp(32px, 6.2vw, 74px);
  line-height: 1.04;
  letter-spacing: -0.012em;
  font-weight: 800;
  max-width: 17ch;
}

.page-about .hero-lead {
  margin: 0;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.78;
  color: var(--link-quiet);
}

.page-about .hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-about .hero-facts > div {
  background: var(--panel);
  padding: 14px 16px 16px;
  min-width: 0;
}

.page-about .hero-facts dt {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .hero-facts dd {
  margin: 8px 0 0;
  font-size: clamp(18px, 2.6vw, 26px);
  line-height: 1.1;
  color: var(--cyan);
  letter-spacing: 0.01em;
  word-break: break-word;
}

/* ---------- 画布与代际刻度轴 ---------- */
.page-about .about-canvas {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  padding-bottom: clamp(32px, 6vw, 72px);
}

.page-about .gen-axis {
  display: none;
}

.page-about .about-flow {
  min-width: 0;
}

.page-about .about-sec {
  padding: clamp(34px, 5.4vw, 68px) 0;
  border-top: 1px solid var(--hair);
}

.page-about .about-flow .about-sec:first-child {
  border-top: 0;
  padding-top: clamp(26px, 4vw, 48px);
}

.page-about .sec-head {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .sec-head .index-label {
  margin: 0 0 12px;
}

.page-about .sec-head h2 {
  margin: 0 0 12px;
  font-size: clamp(24px, 3.4vw, 42px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  font-weight: 700;
  max-width: 20ch;
}

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

.page-about .sec-foot {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--hair);
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 01 沿革 ---------- */
.page-about .lineage-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 30px);
}

.page-about .lineage-figure {
  max-height: 300px;
  overflow: hidden;
}

.page-about .lineage-figure img {
  height: 100%;
  object-fit: cover;
}

.page-about .gen-list {
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: 0;
}

.page-about .gen-item {
  padding: 18px 0 20px;
  border-top: 1px solid var(--hair);
}

.page-about .gen-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .gen-code {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-about .gen-code.is-current {
  color: var(--cyan);
}

.page-about .gen-item h3 {
  margin: 7px 0 8px;
  font-size: clamp(17px, 2.1vw, 21px);
  line-height: 1.3;
  font-weight: 600;
}

.page-about .gen-item p:not(.gen-code) {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--link-quiet);
}

/* ---------- 02 版本号 ---------- */
.page-about .ver-big {
  display: flex;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 4px;
  padding: clamp(16px, 3vw, 28px) 0 clamp(20px, 3vw, 32px);
  border-top: 1px solid var(--line-amber);
  border-bottom: 1px solid var(--hair);
  font-family: var(--mono);
}

.page-about .ver-part {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  min-width: 0;
}

.page-about .ver-part b {
  font-size: clamp(38px, 9.5vw, 92px);
  font-weight: 700;
  line-height: 0.92;
  letter-spacing: -0.02em;
  color: var(--fog);
}

.page-about .ver-part--main b {
  color: var(--cyan);
}

.page-about .ver-part i {
  font-style: normal;
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
  margin-top: 10px;
}

.page-about .ver-dot {
  font-size: clamp(30px, 7vw, 72px);
  line-height: 0.92;
  color: var(--amber);
}

.page-about .ver-notes {
  list-style: none;
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-about .ver-notes li {
  background: var(--panel);
  padding: 18px;
  min-width: 0;
}

.page-about .note-tag {
  margin: 0 0 8px;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-about .ver-notes p:not(.note-tag) {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--link-quiet);
}

/* ---------- 03 文档 ---------- */
.page-about .doc-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-about .doc-stat {
  background: var(--panel);
  padding: 16px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .doc-num {
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.01em;
}

.page-about .doc-cap {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--muted);
}

.page-about .doc-figure {
  margin: 0 0 clamp(20px, 3vw, 30px);
}

.page-about .doc-text p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--link-quiet);
  max-width: 40em;
}

.page-about .doc-text p:last-child {
  margin-bottom: 0;
}

/* ---------- 04 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-about .team-card {
  background: var(--panel);
  padding: 22px 20px 24px;
  min-width: 0;
  transition: background 160ms ease, box-shadow 160ms ease;
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  background: var(--teal);
  box-shadow: inset 0 0 0 1px var(--line-cyan);
}

.page-about .team-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--hair);
  color: var(--cyan);
  margin-bottom: 14px;
}

.page-about .team-card h3 {
  margin: 0 0 9px;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.3;
}

.page-about .team-card p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--link-quiet);
}

.page-about .team-codes {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--dim);
  transition: color 160ms ease;
}

.page-about .team-card:hover .team-codes,
.page-about .team-card:focus-within .team-codes {
  color: var(--amber);
}

.page-about .team-media {
  margin-top: clamp(20px, 3vw, 32px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 26px);
}

.page-about .team-media figure {
  margin: 0;
}

.page-about .team-media > p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 05 覆盖 ---------- */
.page-about .reach-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 40px);
}

.page-about .reach-num {
  margin: 0;
  font-size: clamp(54px, 11vw, 108px);
  line-height: 0.88;
  letter-spacing: -0.03em;
  color: var(--cyan);
}

.page-about .reach-cap {
  margin: 12px 0 16px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-about .reach-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--link-quiet);
  max-width: 38em;
}

.page-about .bar-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  min-width: 0;
}

.page-about .bar-row {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr) 58px;
  align-items: center;
  gap: 10px;
}

.page-about .bar-name {
  font-size: 13px;
  color: var(--fog);
}

.page-about .bar-track {
  display: block;
  height: 6px;
  background: var(--hair);
  overflow: hidden;
}

.page-about .bar-fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), rgba(51, 224, 198, 0.22));
  transition: width 220ms ease;
}

.page-about .bar-fill--a { width: 96%; }
.page-about .bar-fill--b { width: 74%; }
.page-about .bar-fill--c { width: 52%; }
.page-about .bar-fill--d { width: 41%; }
.page-about .bar-fill--e { width: 28%; background: linear-gradient(90deg, var(--amber), rgba(240, 169, 60, 0.2)); }

.page-about .bar-note {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--muted);
  text-align: right;
}

/* ---------- 06 做法 ---------- */
.page-about .creed-panel {
  background: var(--bone);
  color: var(--abyss);
  padding: clamp(22px, 4vw, 44px);
}

.page-about .creed-head .index-label {
  margin: 0 0 12px;
  color: var(--abyss);
  opacity: 0.6;
}

.page-about .creed-head h2 {
  margin: 0 0 clamp(18px, 3vw, 30px);
  font-size: clamp(23px, 3.2vw, 38px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  font-weight: 700;
  color: var(--abyss);
  max-width: 18ch;
}

.page-about .creed-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 30px);
}

.page-about .creed-list li {
  padding-top: 16px;
  border-top: 1px solid rgba(6, 16, 25, 0.18);
  min-width: 0;
}

.page-about .creed-num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--abyss);
  opacity: 0.55;
  margin-bottom: 8px;
}

.page-about .creed-list h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--abyss);
}

.page-about .creed-list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(6, 16, 25, 0.76);
}

/* ---------- 收束 ---------- */
.page-about .about-next {
  padding: clamp(32px, 5vw, 60px) 0 0;
  border-top: 1px solid var(--hair);
}

.page-about .about-next h2 {
  margin: 0 0 10px;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.2;
  font-weight: 700;
  max-width: 20ch;
}

.page-about .about-next > p {
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 焦点可见 ---------- */
.page-about a:focus-visible,
.page-about .team-card:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

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

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

  .page-about .team-media {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }
}

@media (min-width: 760px) {
  .page-about .lineage-grid {
    grid-template-columns: minmax(0, 0.6fr) minmax(0, 1.4fr);
    align-items: start;
  }

  .page-about .lineage-figure {
    max-height: 560px;
  }

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

@media (min-width: 860px) {
  .page-about .team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .reach-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }
}

/* ---------- 桌面：左轴右内容 ---------- */
@media (min-width: 980px) {
  .page-about .hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-canvas {
    grid-template-columns: var(--about-axis) minmax(0, 1fr);
    column-gap: clamp(22px, 3vw, 44px);
  }

  .page-about .gen-axis {
    display: block;
    position: sticky;
    top: calc(var(--header-h-sm) + 36px);
    align-self: start;
    padding-top: clamp(30px, 4vw, 52px);
    min-width: 0;
  }

  .page-about .axis-list {
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0 0 0 8px;
    display: grid;
    gap: 56px;
  }

  .page-about .axis-list::before {
    content: "";
    position: absolute;
    left: 20px;
    top: -6px;
    bottom: 24px;
    width: 1px;
    background: linear-gradient(180deg, transparent, var(--line-cyan) 10%, var(--line-amber) 82%, transparent);
  }

  .page-about .axis-item {
    position: relative;
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .page-about .axis-dot {
    flex: none;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    border: 1px solid var(--amber);
    background: var(--abyss);
  }

  .page-about .axis-dot.is-current {
    border-color: var(--cyan);
    background: var(--cyan);
    box-shadow: 0 0 0 4px rgba(51, 224, 198, 0.16);
  }

  .page-about .axis-label {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.04em;
    color: var(--muted);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .team-codes,
  .page-about .bar-fill {
    transition: none;
  }
}
<<<END>>>