.page-about {
  --about-axis-w: 152px;
  --about-lime-soft: rgba(200, 255, 77, 0.14);
  --about-amber-soft: rgba(242, 184, 75, 0.14);
  padding-bottom: clamp(56px, 8vw, 120px);
}

.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(24px, 4vw, 48px) clamp(36px, 6vw, 80px);
  background:
    radial-gradient(120% 90% at 88% -12%, rgba(200, 255, 77, 0.10), transparent 58%),
    linear-gradient(158deg, var(--grad-a) 0%, var(--ink) 54%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 38%;
  right: -14%;
  bottom: -46%;
  height: 300px;
  background: linear-gradient(96deg, rgba(200, 255, 77, 0.10), rgba(242, 184, 75, 0.05) 70%, transparent);
  transform: skewY(-12deg);
  pointer-events: none;
  z-index: 0;
}

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

.page-about .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 36px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  color: var(--text-3);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

.page-about .breadcrumb a {
  color: var(--text-2);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  color: var(--lime);
}

.page-about .breadcrumb [aria-current="page"] {
  color: var(--text);
}

.page-about .hero-grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .hero-copy h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(40px, 8.4vw, 92px);
  line-height: 0.96;
  letter-spacing: -0.02em;
  color: var(--text);
}

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

.page-about .hero-lede {
  max-width: 48ch;
  margin: clamp(18px, 2.4vw, 28px) 0 0;
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--text-2);
}

.page-about .hero-fig {
  margin: 0;
}

.page-about .hero-stats {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: clamp(18px, 2.6vw, 26px) 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
}

.page-about .hero-stats li {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.page-about .hero-stats .mono {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1;
  color: var(--lime);
  letter-spacing: -0.01em;
}

.page-about .hero-stats li span:last-child {
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--text-2);
}

/* ---------- 图片容器 ---------- */
.page-about .about-fig {
  position: relative;
  margin: clamp(22px, 3.6vw, 36px) 0 0;
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
}

.page-about .about-fig::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--lime), rgba(200, 255, 77, 0.12) 62%, transparent);
  z-index: 2;
}

.page-about .about-fig img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.72) brightness(0.86);
}

.page-about .media-cap {
  display: block;
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--text-3);
}

/* ---------- 章节外壳 ---------- */
.page-about .about-shell {
  display: grid;
  min-width: 0;
}

.page-about .about-axis {
  position: sticky;
  top: calc(var(--rail-h) + var(--bar-h) + 10px);
  z-index: 4;
  align-self: start;
  margin-inline: calc(-1 * clamp(20px, 4vw, 72px) * -1);
  padding: 10px 0 8px;
  background: linear-gradient(180deg, var(--ink) 78%, transparent);
}

.page-about .axis-label {
  display: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--text-3);
  margin: 0 0 10px;
}

.page-about .axis-list {
  display: flex;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .axis-list li {
  flex: 0 0 auto;
}

.page-about .axis-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-2);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .axis-idx {
  font-size: 10.5px;
  color: var(--text-3);
}

.page-about .axis-list a:hover,
.page-about .axis-list a:focus-visible {
  color: var(--text);
  border-color: var(--text-3);
  outline: none;
}

.page-about .axis-list a[aria-current="true"] {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

.page-about .axis-list a[aria-current="true"] .axis-idx {
  color: rgba(6, 17, 13, 0.6);
}

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

/* ---------- 章节 ---------- */
.page-about .about-sec {
  padding-block: clamp(34px, 5.6vw, 76px);
  border-top: 1px solid var(--line);
}

.page-about .about-sec:first-child {
  border-top: 0;
  padding-top: clamp(22px, 3.4vw, 40px);
}

.page-about .sec-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 4px clamp(14px, 2.6vw, 26px);
  margin-bottom: clamp(18px, 3vw, 32px);
}

.page-about .sec-num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(32px, 5.6vw, 60px);
  line-height: 0.84;
  letter-spacing: -0.03em;
  color: transparent;
  -webkit-text-stroke: 1px var(--text-3);
}

.page-about .sec-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.4vw, 38px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .v-note {
  display: none;
}

.page-about .sec-body {
  max-width: 64ch;
}

.page-about .sec-body p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.88;
  color: var(--text-2);
}

.page-about .sec-body p:last-child {
  margin-bottom: 0;
}

.page-about .sec-body strong {
  color: var(--text);
  font-weight: 600;
  font-family: var(--font-mono);
}

/* ---------- 长期跟队要点 ---------- */
.page-about .flat-list {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
  max-width: 64ch;
}

.page-about .flat-list li {
  display: grid;
  gap: 5px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .flat-key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--lime);
}

.page-about .flat-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--text-2);
}

/* ---------- 团队三列 ---------- */
.page-about .team-cols {
  display: grid;
  margin-top: clamp(22px, 3.4vw, 34px);
  border-top: 1px solid var(--line);
}

.page-about .team-col {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .team-col:last-child {
  border-bottom: 0;
}

.page-about .team-role {
  display: block;
  margin-bottom: 7px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-about .team-col p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-2);
}

/* ---------- 版本演进 ---------- */
.page-about .ver-track {
  list-style: none;
  margin: clamp(22px, 3.4vw, 34px) 0 0;
  padding: 0;
  display: grid;
}

.page-about .ver-node {
  position: relative;
  padding: 0 0 26px 26px;
  border-left: 1px solid var(--line);
}

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

.page-about .ver-dot {
  position: absolute;
  left: -4.5px;
  top: 5px;
  width: 8px;
  height: 8px;
  background: var(--ink);
  border: 1px solid var(--text-3);
  transform: rotate(45deg);
  transition: background-color 0.24s var(--ease), border-color 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.page-about .ver-node.is-current .ver-dot {
  background: var(--lime);
  border-color: var(--lime);
  box-shadow: 0 0 0 4px var(--about-lime-soft);
}

.page-about .ver-tag {
  display: block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--text-2);
  transition: color 0.24s var(--ease);
}

.page-about .ver-node.is-current .ver-tag {
  color: var(--lime);
}

.page-about .ver-node:hover .ver-tag {
  color: var(--lime);
}

.page-about .ver-note {
  margin: 8px 0 0;
  max-width: 40ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-2);
}

/* ---------- 运营信息 ---------- */
.page-about .info-board {
  margin-top: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  background: var(--panel);
  max-width: 72ch;
}

.page-about .info-row {
  display: grid;
  gap: 5px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
}

.page-about .info-row:last-child {
  border-bottom: 0;
}

.page-about .info-key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--text-3);
}

.page-about .info-val {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  overflow-wrap: anywhere;
}

.page-about .info-val a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 77, 0.42);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .info-val a:hover,
.page-about .info-val a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
  outline: none;
}

.page-about .info-fine {
  flex: 1 1 100%;
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--text-3);
}

.page-about .tag {
  display: inline-block;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  line-height: 1.4;
}

.page-about .tag-history {
  background: var(--about-amber-soft);
  color: var(--amber);
  border: 1px solid rgba(242, 184, 75, 0.42);
}

/* ---------- 延伸链接 ---------- */
.page-about .next-links {
  display: grid;
  gap: 1px;
  margin-top: clamp(22px, 3.4vw, 34px);
  border: 1px solid var(--line);
  background: var(--line);
  max-width: 72ch;
}

.page-about .next-link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 18px;
  background: var(--ink);
  color: var(--text);
  font-size: 15px;
  text-decoration: none;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .next-link .next-arrow {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-3);
  transition: transform 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .next-link:hover,
.page-about .next-link:focus-visible {
  background: var(--panel);
  color: var(--lime);
  outline: none;
}

.page-about .next-link:hover .next-arrow,
.page-about .next-link:focus-visible .next-arrow {
  color: var(--lime);
  transform: translateX(4px);
}

/* ---------- 返回顶部 ---------- */
.page-about .to-top {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--lime);
  text-decoration: none;
}

.page-about .to-top--float {
  position: fixed;
  right: clamp(14px, 3vw, 32px);
  bottom: clamp(14px, 3vw, 32px);
  z-index: 20;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 720px) {
  .page-about .info-row {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 4px 20px;
    align-items: baseline;
    padding: 17px 22px;
  }

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

  .page-about .team-col {
    padding: 20px 22px 4px 0;
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }

  .page-about .team-col:last-child {
    border-right: 0;
    padding-right: 0;
  }

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

@media (min-width: 880px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: end;
  }

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

  .page-about .hero-lede {
    padding-bottom: 6px;
  }

  .page-about .sec-head {
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: start;
  }

  .page-about .v-note {
    display: inline-block;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    align-self: start;
    margin-top: 2px;
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: 0.26em;
    color: var(--text-3);
  }

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

  .page-about .ver-track::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    height: 1px;
    background: var(--line);
  }

  .page-about .ver-node {
    padding: 24px 22px 0 0;
    border-left: 0;
  }

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

  .page-about .ver-dot {
    left: 0;
    top: -4px;
  }

  .page-about .ver-note {
    max-width: 26ch;
  }
}

/* ---------- 桌面：左侧章节轴 ---------- */
@media (min-width: 1000px) {
  .page-about .about-shell {
    grid-template-columns: var(--about-axis-w) minmax(0, 1fr);
    gap: clamp(32px, 4.6vw, 76px);
    align-items: start;
  }

  .page-about .about-axis {
    top: calc(var(--rail-h) + var(--bar-h) + 28px);
    margin-inline: 0;
    padding: 6px 0 0;
    background: transparent;
  }

  .page-about .axis-label {
    display: block;
  }

  .page-about .axis-list {
    display: block;
    overflow: visible;
    padding: 0;
    border-top: 1px solid var(--line);
  }

  .page-about .axis-list li {
    flex: none;
  }

  .page-about .axis-list a {
    display: flex;
    width: 100%;
    gap: 10px;
    padding: 11px 0 11px 0;
    border: 0;
    border-left: 1px solid var(--line);
    padding-left: 14px;
    white-space: normal;
    background: transparent;
    color: var(--text-3);
  }

  .page-about .axis-list a:hover,
  .page-about .axis-list a:focus-visible {
    color: var(--text);
    border-left-color: var(--text-3);
  }

  .page-about .axis-list a[aria-current="true"] {
    color: var(--lime);
    background: transparent;
    border-left-color: var(--lime);
    border-left-width: 2px;
    padding-left: 13px;
  }

  .page-about .axis-list a[aria-current="true"] .axis-idx {
    color: var(--lime);
  }

  .page-about .about-body {
    position: relative;
  }

  .page-about .about-body::after {
    content: "";
    position: absolute;
    top: 0;
    right: calc(-1 * clamp(16px, 2.4vw, 40px));
    width: 1px;
    height: 100%;
    background: linear-gradient(180deg, var(--line), transparent 78%);
    pointer-events: none;
  }

  .page-about .sec-body,
  .page-about .flat-list {
    max-width: 60ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ver-dot,
  .page-about .ver-tag,
  .page-about .next-link,
  .page-about .next-arrow,
  .page-about .axis-list a {
    transition: none;
  }

  .page-about .next-link:hover .next-arrow,
  .page-about .next-link:focus-visible .next-arrow {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>