.page-about {
  background: var(--ink);
  color: var(--white);
  overflow-x: hidden;
}

.page-about section[id] {
  scroll-margin-top: 104px;
}

.page-about .about-wrap {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

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

/* ---------- 首屏 ---------- */
.page-about .about-cover {
  position: relative;
  background:
    radial-gradient(90% 120% at 86% -12%, rgba(198, 255, 74, .17), transparent 60%),
    radial-gradient(75% 95% at 2% 112%, rgba(18, 107, 90, .42), transparent 66%),
    var(--ink);
  border-bottom: 1px solid var(--line);
}

.page-about .about-cover::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, rgba(168, 184, 200, .07) 1px, transparent 1px);
  background-size: 88px 100%;
  -webkit-mask-image: linear-gradient(to bottom, #000, transparent 88%);
  mask-image: linear-gradient(to bottom, #000, transparent 88%);
  pointer-events: none;
}

.page-about .about-cover__inner {
  position: relative;
  padding-block: 26px 46px;
}

.page-about .about-cover__kicker {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .17em;
  color: var(--lime);
  margin: 18px 0 14px;
}

.page-about .about-cover h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 6.2vw, 3.9rem);
  line-height: 1.07;
  letter-spacing: -.03em;
  margin: 0 0 18px;
  max-width: 20ch;
}

.page-about .about-cover__lede {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--haze);
  margin: 0 0 26px;
  max-width: 62ch;
}

.page-about .about-cover__index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-cover__index a {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  padding: 7px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--pill);
  color: var(--white);
  text-decoration: none;
  transition: border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease);
}

.page-about .about-cover__index a:hover,
.page-about .about-cover__index a:focus-visible {
  border-color: var(--lime-line);
  color: var(--lime);
  background: var(--lime-soft);
}

/* ---------- 通用章节头 ---------- */
.page-about .about-head {
  margin-bottom: 30px;
}

.page-about .about-head__kicker {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--orange);
  margin: 0 0 12px;
}

.page-about .about-head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.55rem, 4.4vw, 2.45rem);
  line-height: 1.16;
  letter-spacing: -.02em;
  margin: 0 0 14px;
  max-width: 24ch;
}

.page-about .about-head__sub {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--haze);
  max-width: 62ch;
}

/* ---------- 图片容器 ---------- */
.page-about .about-figure {
  position: relative;
  margin: 28px 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--turf);
  aspect-ratio: 16 / 9;
}

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

.page-about .about-figure figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 22px 14px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--white);
  background: linear-gradient(to top, rgba(7, 26, 20, .94), rgba(7, 26, 20, 0));
}

/* ---------- 发展脉络 ---------- */
.page-about .about-timeline {
  padding-block: 52px 56px;
  background: var(--ink);
}

.page-about .nodes {
  position: relative;
  padding-left: 24px;
  border-left: 1px solid var(--line-strong);
}

.page-about .node {
  position: relative;
  border-bottom: 1px solid var(--line);
}

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

.page-about .node::before {
  content: "";
  position: absolute;
  left: -28.5px;
  top: 21px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--lime-line);
  transition: background .22s var(--ease), box-shadow .22s var(--ease);
}

.page-about .node[open]::before {
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(198, 255, 74, .14);
}

.page-about .node__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 12px;
  padding: 15px 0 13px;
  cursor: pointer;
  list-style: none;
}

.page-about .node__head::-webkit-details-marker {
  display: none;
}

.page-about .node__year {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .1em;
  color: var(--lime);
}

.page-about .node__title {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: -.01em;
}

.page-about .node__sign {
  flex: none;
  align-self: center;
  width: 9px;
  height: 9px;
  border-right: 1px solid var(--haze);
  border-bottom: 1px solid var(--haze);
  transform: rotate(45deg);
  transition: transform .25s var(--ease), border-color .25s var(--ease);
}

.page-about .node[open] .node__sign {
  transform: rotate(-135deg);
  border-color: var(--lime);
}

.page-about .node__body {
  padding: 0 0 16px;
}

.page-about .node__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--haze);
  max-width: 64ch;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--turf);
  border-block: 1px solid var(--line);
  padding-block: 52px;
}

.page-about .about-team__body h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.55rem, 4.4vw, 2.45rem);
  line-height: 1.16;
  letter-spacing: -.02em;
  margin: 0 0 14px;
  max-width: 20ch;
}

.page-about .about-team .about-head__kicker {
  display: block;
  margin: 20px 0 12px;
}

.page-about .about-team .about-head__sub {
  margin: 0;
}

.page-about .team-bars {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .team-bar {
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.page-about .team-bar__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.page-about .team-bar__name {
  font-size: 14.5px;
  font-weight: 600;
}

.page-about .team-bar__num {
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--lime);
  letter-spacing: .02em;
}

.page-about .team-bar__track {
  height: 6px;
  border-radius: 3px;
  background: rgba(168, 184, 200, .16);
  overflow: hidden;
}

.page-about .team-bar__fill {
  display: block;
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--teal), var(--lime));
}

.page-about .team-bar--edit .team-bar__fill { width: 43%; }
.page-about .team-bar--data .team-bar__fill { width: 24%; }
.page-about .team-bar--dev .team-bar__fill { width: 21%; }
.page-about .team-bar--ops .team-bar__fill { width: 12%; }

.page-about .team-bar__duty {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--haze);
}

/* ---------- 内容把关（纸面） ---------- */
.page-about .about-check {
  background: var(--paper);
  color: var(--paper-ink);
  padding-block: 52px;
}

.page-about .about-check .about-head__kicker {
  color: #B4532A;
}

.page-about .about-check .about-head h2 {
  color: var(--paper-ink);
}

.page-about .about-check .about-head__sub {
  color: #46564E;
}

.page-about .check-steps {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
}

.page-about .check-step {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-top: 1px solid rgba(30, 42, 36, .16);
}

.page-about .check-step__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: #B4532A;
  padding-top: 3px;
}

.page-about .check-step h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.01em;
}

.page-about .check-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: #46564E;
}

.page-about .check-note {
  margin: 18px 0 0;
  padding: 14px 16px;
  border-left: 3px solid #126B5A;
  background: rgba(18, 107, 90, .07);
  font-size: 13.5px;
  line-height: 1.8;
  color: #33443C;
}

/* ---------- 覆盖规模 ---------- */
.page-about .about-scale {
  padding-block: 52px;
  background:
    radial-gradient(110% 100% at 84% -6%, rgba(18, 107, 90, .5), transparent 62%),
    var(--ink);
  border-top: 1px solid var(--line);
}

.page-about .about-scale__grid {
  display: grid;
  gap: 28px;
}

.page-about .donut {
  position: relative;
  margin: 0;
  display: flex;
  justify-content: center;
}

.page-about .donut svg {
  width: 100%;
  max-width: 220px;
  height: auto;
}

.page-about .donut__cap {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  pointer-events: none;
}

.page-about .donut__total {
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--white);
  line-height: 1;
}

.page-about .donut__unit {
  font-size: 11.5px;
  color: var(--haze);
}

.page-about .donut-legend {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-size: 13px;
  color: var(--haze);
}

.page-about .donut-legend li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.page-about .donut-legend b {
  font-family: var(--font-mono);
  color: var(--white);
  font-weight: 700;
}

.page-about .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex: none;
}

.page-about .dot--lime { background: var(--lime); }
.page-about .dot--teal { background: var(--teal); }
.page-about .dot--orange { background: var(--orange); }

.page-about .about-scale__text {
  margin: 0 0 22px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--haze);
  max-width: 60ch;
}

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

.page-about .big-stat {
  background: var(--ink);
  padding: 16px 14px;
}

.page-about .big-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 4.6vw, 1.95rem);
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--white);
  line-height: 1.1;
}

.page-about .big-stat__num em {
  font-style: normal;
  font-size: .5em;
  color: var(--orange);
  margin-left: 2px;
  letter-spacing: 0;
}

.page-about .big-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--haze);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  padding-block: 52px;
  background: var(--turf-soft);
  border-top: 1px solid var(--line);
}

.page-about .about-partners__grid {
  display: grid;
  gap: 26px;
}

.page-about .network {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: radial-gradient(70% 70% at 50% 45%, rgba(198, 255, 74, .08), transparent 70%), var(--turf);
  padding: 18px;
  box-shadow: var(--shadow-soft);
}

.page-about .network__svg {
  display: block;
  width: 100%;
  max-width: 300px;
  height: auto;
  margin: 0 auto;
}

.page-about .network__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  fill: var(--lime);
}

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

.page-about .partner {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(7, 26, 20, .55);
  padding: 16px 16px 18px;
  transition: border-color .22s var(--ease), transform .22s var(--ease);
}

.page-about .partner:hover {
  border-color: var(--orange-line);
  transform: translateY(-2px);
}

.page-about .partner__k {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--orange);
  margin: 0 0 6px;
}

.page-about .partner h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -.01em;
}

.page-about .partner p:last-child {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--haze);
}

.page-about .about-partners__award {
  margin: 24px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.8;
  color: var(--haze);
}

/* ---------- 合作响应（纸面） ---------- */
.page-about .about-commit {
  padding-block: 52px 58px;
}

.page-about .about-commit .about-head__kicker {
  color: #B4532A;
}

.page-about .about-commit h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.55rem, 4.4vw, 2.4rem);
  line-height: 1.16;
  letter-spacing: -.02em;
  margin: 0 0 14px;
  max-width: 18ch;
}

.page-about .about-commit__lede {
  margin: 0 0 22px;
  font-size: 14.5px;
  line-height: 1.8;
  color: #46564E;
  max-width: 44ch;
}

.page-about .about-commit__links {
  margin: 0 0 16px;
}

.page-about .about-commit__more {
  margin: 0 0 28px;
  font-size: 13.5px;
  line-height: 1.8;
  color: #46564E;
}

.page-about .about-commit__more a {
  color: #126B5A;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .commit {
  border-top: 1px solid rgba(30, 42, 36, .18);
}

.page-about .commit:last-child {
  border-bottom: 1px solid rgba(30, 42, 36, .18);
}

.page-about .commit summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -.01em;
}

.page-about .commit summary::-webkit-details-marker {
  display: none;
}

.page-about .commit__sign {
  flex: none;
  width: 9px;
  height: 9px;
  border-right: 1.5px solid var(--paper-ink);
  border-bottom: 1.5px solid var(--paper-ink);
  transform: rotate(45deg);
  transition: transform .25s var(--ease);
}

.page-about .commit[open] .commit__sign {
  transform: rotate(-135deg);
}

.page-about .commit p {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.82;
  color: #46564E;
  max-width: 52ch;
}

/* ---------- 平板以上 ---------- */
@media (min-width: 700px) {
  .page-about .about-cover__inner {
    padding-block: 34px 62px;
  }

  .page-about .about-cover__lede {
    font-size: 16.5px;
  }

  .page-about .about-timeline,
  .page-about .about-team,
  .page-about .about-check,
  .page-about .about-scale,
  .page-about .about-partners,
  .page-about .about-commit {
    padding-block: 72px;
  }

  .page-about .nodes {
    padding-left: 34px;
  }

  .page-about .node::before {
    left: -38.5px;
  }

  .page-about .node__head {
    display: grid;
    grid-template-columns: 74px minmax(0, 1fr) 12px;
    align-items: center;
    gap: 18px;
    padding: 18px 0 16px;
  }

  .page-about .node__year {
    font-size: 15px;
  }

  .page-about .node__title {
    font-size: 17px;
  }

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

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

/* ---------- 桌面 ---------- */
@media (min-width: 980px) {
  .page-about .about-cover h1 {
    margin-bottom: 22px;
  }

  .page-about .about-team__grid {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-team__figure {
    margin-top: 46px;
  }

  .page-about .about-team .about-head__kicker {
    margin-top: 0;
  }

  .page-about .about-scale__grid {
    display: grid;
    grid-template-columns: 262px minmax(0, 1fr);
    gap: 54px;
    align-items: center;
  }

  .page-about .about-scale__body {
    padding-left: 6px;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 46px;
    align-items: start;
  }

  .page-about .network {
    padding: 26px;
  }

  .page-about .partner-list {
    gap: 14px;
  }

  .page-about .partner:nth-child(even) {
    transform: translateY(18px);
  }

  .page-about .partner:nth-child(even):hover {
    transform: translateY(16px);
  }

  .page-about .about-commit__grid {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-commit__more {
    margin-bottom: 0;
  }

  .page-about .check-step {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 22px;
    padding: 24px 0;
  }

  .page-about .check-step__no {
    font-size: 14px;
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-cover__index a,
  .page-about .node::before,
  .page-about .node__sign,
  .page-about .commit__sign,
  .page-about .partner {
    transition: none;
  }

  .page-about .partner:hover,
  .page-about .partner:nth-child(even),
  .page-about .partner:nth-child(even):hover {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>