.page-about {
  --about-r: 16px;
  padding-bottom: clamp(40px, 6vw, 80px);
  font-family: var(--ff-sans);
}

.page-about .wrap {
  padding-inline: clamp(16px, 4vw, 32px);
}

.page-about h2 {
  margin: 0;
  font-size: clamp(23px, 3.4vw, 38px);
  line-height: 1.16;
  letter-spacing: -0.015em;
  font-weight: 900;
  color: var(--paper);
}

.page-about a {
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background-color 180ms var(--ease);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(26px, 5vw, 64px) clamp(24px, 4vw, 44px);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -22%;
  right: -12%;
  width: min(560px, 78vw);
  height: 400px;
  background:
    radial-gradient(circle at 68% 32%, rgba(0, 229, 208, .22), transparent 62%),
    radial-gradient(circle at 26% 78%, rgba(255, 122, 26, .18), transparent 60%);
  pointer-events: none;
}

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

.page-about .about-hero__kicker {
  display: block;
  margin: 18px 0 12px;
  color: var(--signal);
}

.page-about .about-hero h1 {
  margin: 0;
  max-width: 17em;
  font-size: clamp(29px, 5.4vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--paper);
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.7vw, 17.5px);
  line-height: 1.78;
  color: rgba(244, 247, 255, .84);
}

.page-about .about-stats {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--about-r);
  overflow: hidden;
}

.page-about .about-stats li {
  display: grid;
  gap: 3px;
  padding: 14px 16px 16px;
  background: var(--ink-2);
}

.page-about .about-stats__k {
  color: var(--mute);
}

.page-about .about-stats__v {
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.1;
  font-weight: 700;
  color: var(--signal);
}

.page-about .about-stats li:nth-child(2) .about-stats__v,
.page-about .about-stats li:nth-child(4) .about-stats__v {
  color: var(--rush);
}

.page-about .about-stats__d {
  font-size: 12px;
  line-height: 1.5;
  color: var(--mute);
}

@media (min-width: 960px) {
  .page-about .about-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .9fr);
    gap: clamp(24px, 4vw, 56px);
    align-items: end;
  }

  .page-about .about-hero .crumbs {
    grid-column: 1 / -1;
  }

  .page-about .about-stats {
    margin-top: 0;
  }
}

/* ---------- 版本路径 ---------- */
.page-about .about-stream {
  display: grid;
  gap: 18px;
}

.page-about .about-years {
  border: 1px solid var(--line-soft);
  border-radius: var(--about-r);
  background: rgba(28, 58, 107, .3);
  padding: 12px 12px 14px;
}

.page-about .about-years__label {
  display: block;
  margin: 0 0 10px;
  color: var(--mute);
}

.page-about .about-years__list {
  list-style: none;
  margin: 0;
  padding: 0 0 2px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
}

.page-about .about-years__list a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 11px;
  border-radius: 999px;
  border: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.3;
  white-space: nowrap;
  color: var(--paper);
  text-decoration: none;
  background: rgba(10, 20, 40, .5);
}

.page-about .about-years__list a .mono {
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--signal);
}

.page-about .about-years__list a:hover,
.page-about .about-years__list a:focus-visible {
  border-color: var(--signal);
  background: rgba(0, 229, 208, .12);
}

.page-about .about-versions__lede {
  margin: 12px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mute);
}

.page-about .about-figure {
  margin: 22px 0 26px;
  border: 1px solid var(--line-soft);
  border-radius: var(--about-r);
  overflow: hidden;
  background: linear-gradient(118deg, rgba(0, 229, 208, .16), rgba(255, 122, 26, .12));
}

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

@media (min-width: 1080px) {
  .page-about .about-stream {
    grid-template-columns: 136px minmax(0, 1fr);
    gap: clamp(26px, 4vw, 60px);
    align-items: start;
  }

  .page-about .about-years {
    position: sticky;
    top: calc(var(--top-h) + 24px);
    padding: 14px 12px;
  }

  .page-about .about-years__list {
    flex-direction: column;
    overflow: visible;
    gap: 6px;
  }

  .page-about .about-years__list a {
    width: 100%;
    border-radius: 10px;
    justify-content: flex-start;
    white-space: normal;
  }
}

/* ---------- 时间轴节点 ---------- */
.page-about .tl {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(to bottom, var(--signal), var(--rush) 55%, rgba(38, 64, 110, .45));
}

.page-about .tl__item {
  position: relative;
  padding-left: 32px;
  margin-bottom: 12px;
  scroll-margin-top: calc(var(--top-h) + 96px);
}

.page-about .tl__item:last-child {
  margin-bottom: 0;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 19px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--signal);
  box-shadow: 0 0 0 4px rgba(0, 229, 208, .1);
}

.page-about .tl__node {
  border: 1px solid var(--line-soft);
  border-radius: 14px;
  background: var(--ink-2);
  transition: border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-about .tl__node[open] {
  border-color: rgba(0, 229, 208, .45);
  background: linear-gradient(180deg, rgba(28, 58, 107, .5), rgba(16, 31, 60, 1) 60%);
}

.page-about .tl__node summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding: 14px 16px;
  list-style: none;
  cursor: pointer;
}

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

.page-about .tl__badge {
  flex: none;
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--signal);
  color: #06121F;
  font-family: var(--ff-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .06em;
}

.page-about .tl__title {
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .tl__hint {
  margin-left: auto;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mute);
}

.page-about .tl__hint::after {
  content: "展开";
}

.page-about .tl__node[open] .tl__hint::after {
  content: "收起";
}

.page-about .tl__node summary:hover .tl__hint,
.page-about .tl__node summary:focus-visible .tl__hint {
  color: var(--rush);
}

.page-about .tl__body {
  margin-top: 2px;
  padding: 14px 16px 16px;
  border-top: 1px solid rgba(38, 64, 110, .55);
}

.page-about .tl__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(244, 247, 255, .84);
}

.page-about .tl__points {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 7px;
}

.page-about .tl__points li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.68;
  color: var(--mute);
}

.page-about .tl__points li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: .62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--rush);
}

/* ---------- 团队分工 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-team__main > p {
  margin: 14px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mute);
}

.page-about .bars {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .bars__item {
  padding-left: 14px;
  border-left: 3px solid var(--line);
}

.page-about .bars__item:nth-child(1) { border-color: var(--signal); }
.page-about .bars__item:nth-child(2) { border-color: var(--rush); }
.page-about .bars__item:nth-child(3) { border-color: var(--pass); }
.page-about .bars__item:nth-child(4) { border-color: var(--hold); }

.page-about .bars__meta {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .bars__role {
  font-size: 17px;
  font-weight: 800;
  color: var(--paper);
}

.page-about .bars__num {
  margin-left: auto;
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
}

.page-about .bars__num::after {
  content: " 人";
  font-family: var(--ff-sans);
  font-size: 12px;
  font-weight: 400;
  color: var(--mute);
}

.page-about .bars__track {
  height: 6px;
  margin: 9px 0 8px;
  border-radius: 999px;
  background: rgba(28, 58, 107, .62);
  overflow: hidden;
}

.page-about .bars__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: var(--signal);
}

.page-about .bars__item:nth-child(1) .bars__fill {
  width: 100%;
  background: linear-gradient(90deg, #00E5D0, rgba(0, 229, 208, .42));
}

.page-about .bars__item:nth-child(2) .bars__fill {
  width: 50%;
  background: linear-gradient(90deg, #FF7A1A, rgba(255, 122, 26, .42));
}

.page-about .bars__item:nth-child(3) .bars__fill {
  width: 42%;
  background: linear-gradient(90deg, #2BE08A, rgba(43, 224, 138, .42));
}

.page-about .bars__item:nth-child(4) .bars__fill {
  width: 25%;
  background: linear-gradient(90deg, #FFC24B, rgba(255, 194, 75, .42));
}

.page-about .bars__duty {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mute);
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--about-r);
  overflow: hidden;
  background: var(--ink-2);
}

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

.page-about .about-team__figure figcaption {
  padding: 12px 14px 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.68;
  color: var(--mute);
}

@media (min-width: 900px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }
}

/* ---------- 核对流程 ---------- */
.page-about .about-flow {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: 20px;
  background: var(--ink-2);
}

.page-about .about-flow__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.page-about .about-flow__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .3;
}

.page-about .about-flow__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, rgba(10, 20, 40, .97) 24%, rgba(10, 20, 40, .78) 62%, rgba(10, 20, 40, .95));
}

.page-about .about-flow__inner {
  position: relative;
  z-index: 1;
  padding: clamp(22px, 4vw, 46px);
}

.page-about .about-flow__lede {
  margin: 12px 0 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mute);
}

.page-about .steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .steps li {
  position: relative;
  padding-left: 44px;
}

.page-about .steps__n {
  position: absolute;
  left: 0;
  top: 1px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--rush);
}

.page-about .steps h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .steps p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mute);
}

@media (min-width: 800px) {
  .page-about .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 28px;
  }
}

/* ---------- 规模与场景 ---------- */
.page-about .about-scale__nums {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
}

.page-about .about-scale__nums li {
  display: grid;
  gap: 4px;
  padding-left: 14px;
  border-left: 2px solid var(--signal);
}

.page-about .about-scale__nums li:nth-child(even) {
  border-left-color: var(--rush);
}

.page-about .about-scale__nums .mono {
  font-size: clamp(25px, 4vw, 38px);
  font-weight: 700;
  line-height: 1.06;
  color: var(--paper);
}

.page-about .about-scale__nums .label {
  color: var(--mute);
}

.page-about .about-scenes {
  margin-top: 26px;
}

.page-about .about-scene {
  border-left: 3px solid var(--signal);
}

.page-about .about-scene .label {
  display: block;
  margin: 0 0 10px;
  color: var(--rush);
}

.page-about .about-scene h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-scene p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--mute);
}

@media (min-width: 720px) {
  .page-about .about-scale__nums {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 合作与维护 ---------- */
.page-about .about-partner__inner {
  padding-top: clamp(26px, 4vw, 44px);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-partner__inner p {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(244, 247, 255, .84);
}

.page-about .about-partner__inner a {
  color: var(--signal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-partner__inner a:hover {
  color: var(--rush);
}

.page-about .about-partner__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-partner__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(244, 247, 255, .84);
}

.page-about .about-partner__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .58em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--signal);
  transform: rotate(45deg);
}

/* ---------- 收尾 ---------- */
.page-about .about-next {
  border: 1px solid rgba(255, 122, 26, .34);
  border-radius: 20px;
  padding: clamp(22px, 4vw, 44px);
  background: linear-gradient(135deg, rgba(255, 122, 26, .15), rgba(0, 229, 208, .1) 58%, rgba(16, 31, 60, .92));
}

.page-about .about-next h2 {
  max-width: 20em;
}

.page-about .about-next > p {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(244, 247, 255, .86);
}

.page-about .about-next__links {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-next__note {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mute);
}

@media (max-width: 480px) {
  .page-about .about-next__links {
    flex-direction: column;
    align-items: stretch;
  }

  .page-about .about-next__links .btn {
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about a,
  .page-about .tl__node {
    transition: none;
  }
}
<<<END>>>