.page-about {
  --about-lede: #C9DBD4;
  --about-axis: 56px;
  --about-rule: rgba(198, 216, 209, .16);
}

.page-about section[id] {
  scroll-margin-top: 100px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(92px, 11vw, 148px) 0 clamp(48px, 6vw, 88px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(120% 90% at 82% -10%, rgba(54, 242, 192, .12), transparent 62%),
    radial-gradient(90% 70% at -10% 110%, rgba(244, 184, 74, .07), transparent 70%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 46px;
  z-index: 0;
  background-image: repeating-linear-gradient(90deg, var(--about-rule) 0 1px, transparent 1px 22px);
  opacity: .55;
  pointer-events: none;
}

.page-about .about-hero__arc {
  position: absolute;
  right: -16%;
  top: 4%;
  width: min(660px, 78vw);
  height: auto;
  color: rgba(54, 242, 192, .15);
  z-index: 0;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(34px, 5vw, 64px);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(38px, 8vw, 96px);
  line-height: .98;
  font-weight: 900;
  letter-spacing: -.035em;
  color: var(--c-mist);
}

.page-about .about-hero__lede {
  margin: 22px 0 0;
  max-width: 620px;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.9;
  color: var(--about-lede);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3vw, 36px);
}

.page-about .about-hero__panel {
  padding: clamp(20px, 2.6vw, 32px);
  border: 1px solid var(--line-soft);
}

.page-about .about-hero__panel-title {
  margin: 0 0 18px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--c-slate);
}

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

.page-about .about-stats__item {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  align-items: baseline;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
}

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

.page-about .about-stats .stat__value {
  font-size: clamp(26px, 2.8vw, 34px);
  line-height: 1;
  color: var(--c-teal);
}

.page-about .about-stats__item:nth-child(2) .stat__value {
  color: var(--c-amber);
}

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

.page-about .about-stats .stat__label {
  font-size: 13px;
  line-height: 1.65;
  color: var(--c-slate);
}

/* ---------- 章节导航 ---------- */
.page-about .about-toc {
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background: rgba(14, 42, 35, .55);
}

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 13px 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px clamp(14px, 2.4vw, 32px);
}

.page-about .about-toc__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 3px 0;
  font-size: 14px;
  color: var(--c-slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s ease, border-color .16s ease;
}

.page-about .about-toc__link .mono {
  font-size: 11px;
  color: var(--c-amber);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--c-mist);
  border-bottom-color: var(--c-teal);
}

/* ---------- 通用章节头 ---------- */
.page-about .about-head {
  max-width: 760px;
  margin-bottom: clamp(26px, 3.4vw, 44px);
}

.page-about .about-head h2 {
  margin: 12px 0 0;
  font-size: clamp(25px, 3.5vw, 42px);
  line-height: 1.18;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--c-mist);
}

.page-about .about-head__lede {
  margin: 16px 0 0;
  max-width: 640px;
  font-size: clamp(14px, 1.4vw, 16px);
  line-height: 1.9;
  color: var(--about-lede);
}

/* ---------- 出发点 ---------- */
.page-about .about-origin {
  background: var(--c-ink-2);
}

.page-about .about-origin__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 2.6vw, 30px);
}

.page-about .about-origin__item {
  padding-top: 20px;
  border-top: 2px solid rgba(54, 242, 192, .7);
}

.page-about .about-origin__item:nth-child(2) {
  border-top-color: rgba(244, 184, 74, .8);
}

.page-about .about-origin__item:nth-child(3) {
  border-top-color: rgba(145, 168, 180, .6);
}

.page-about .about-origin__no {
  display: block;
  font-size: 38px;
  line-height: 1;
  letter-spacing: -.04em;
  color: rgba(54, 242, 192, .30);
}

.page-about .about-origin__item:nth-child(2) .about-origin__no {
  color: rgba(244, 184, 74, .32);
}

.page-about .about-origin__item:nth-child(3) .about-origin__no {
  color: rgba(145, 168, 180, .32);
}

.page-about .about-origin__item h3 {
  margin: 14px 0 10px;
  font-size: clamp(17px, 1.9vw, 21px);
  line-height: 1.35;
  color: var(--c-mist);
}

.page-about .about-origin__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-slate);
}

/* ---------- 版本时间线 ---------- */
.page-about .about-versions__figure {
  margin: 0 0 clamp(30px, 4vw, 54px);
}

.page-about .about-versions__figure .media {
  border: 1px solid var(--line-soft);
}

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

.page-about .about-versions__figure .media__caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-slate);
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: var(--about-axis) minmax(0, 1fr);
  gap: clamp(14px, 2.4vw, 32px);
  padding-bottom: clamp(26px, 3.4vw, 46px);
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: calc(var(--about-axis) / 2 - .5px);
  top: var(--about-axis);
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--line-mid), rgba(198, 216, 209, .04));
}

.page-about .timeline__item:last-child::before {
  display: none;
}

.page-about .timeline__marker {
  display: grid;
  place-items: center;
  width: var(--about-axis);
  height: var(--about-axis);
  border: 1px solid var(--line-mid);
  background: var(--c-ink-2);
  color: var(--c-teal);
  font-size: 17px;
  letter-spacing: -.02em;
  transition: background .18s ease, border-color .18s ease, color .18s ease;
}

.page-about .timeline__item--now .timeline__marker {
  color: var(--c-amber);
  border-color: rgba(244, 184, 74, .55);
}

.page-about .timeline__item:hover .timeline__marker {
  background: var(--teal-soft);
  border-color: var(--c-teal);
}

.page-about .timeline__item--now:hover .timeline__marker {
  background: var(--amber-soft);
  border-color: var(--c-amber);
}

.page-about .timeline__body {
  padding-top: 2px;
}

.page-about .timeline__era {
  margin: 0;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--c-amber);
}

.page-about .timeline__body h3 {
  margin: 10px 0 12px;
  font-size: clamp(18px, 2.2vw, 25px);
  line-height: 1.3;
  color: var(--c-mist);
}

.page-about .timeline__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  color: var(--about-lede);
}

.page-about .timeline__detail {
  margin-top: 14px !important;
  padding-left: 14px;
  border-left: 2px solid rgba(244, 184, 74, .45);
  font-size: 13px !important;
  color: var(--c-slate) !important;
}

.page-about .timeline__item:hover .timeline__detail {
  border-left-color: var(--c-amber);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--c-ink-2);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(30px, 4vw, 54px);
}

.page-about .about-team__main h2 {
  margin: 12px 0 0;
  font-size: clamp(25px, 3.5vw, 42px);
  line-height: 1.18;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--c-mist);
}

.page-about .about-team__lede {
  margin: 16px 0 0;
  max-width: 620px;
  font-size: clamp(14px, 1.4vw, 16px);
  line-height: 1.9;
  color: var(--about-lede);
}

.page-about .flow {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .flow__step {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 16px;
  border: 1px solid var(--line-soft);
  background: linear-gradient(90deg, rgba(54, 242, 192, .06), rgba(54, 242, 192, 0) 62%);
  transition: border-color .18s ease, background .18s ease;
}

.page-about .flow__step:hover,
.page-about .flow__step:focus-within {
  border-color: rgba(54, 242, 192, .5);
  background: linear-gradient(90deg, rgba(54, 242, 192, .14), rgba(54, 242, 192, 0) 70%);
}

.page-about .flow__no {
  font-size: 13px;
  color: var(--c-teal);
  padding-top: 3px;
}

.page-about .flow__step h3 {
  margin: 0 0 6px;
  font-size: 16px;
  color: var(--c-mist);
}

.page-about .flow__step p {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--c-slate);
}

.page-about .about-team__tags {
  margin-top: clamp(20px, 2.6vw, 30px);
}

.page-about .about-team__chips-title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-slate);
}

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

.page-about .about-team__figure {
  margin: 0;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-soft);
}

.page-about .about-team__note {
  margin-top: 18px;
  padding: clamp(18px, 2.2vw, 24px);
  border: 1px solid var(--line-soft);
}

.page-about .about-team__note-title {
  margin: 0 0 12px;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--c-amber);
}

.page-about .about-team__steps {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}

.page-about .about-team__steps li {
  font-size: 13px;
  line-height: 1.75;
  color: var(--about-lede);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  position: relative;
  overflow: hidden;
  background: var(--c-ink);
}

.page-about .about-eco__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-eco__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .26;
}

.page-about .about-eco::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(180deg, var(--c-ink) 0%, rgba(7, 26, 21, .55) 45%, var(--c-ink) 100%);
  pointer-events: none;
}

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

.page-about .about-eco__cards {
  display: grid;
  gap: clamp(14px, 2vw, 24px);
}

.page-about .eco-card {
  padding: clamp(20px, 2.4vw, 28px);
  background: var(--c-panel);
  border-top: 2px solid var(--c-teal);
  transition: transform .18s ease, background .18s ease;
}

.page-about .eco-card--amber {
  border-top-color: var(--c-amber);
}

.page-about .eco-card--slate {
  border-top-color: rgba(145, 168, 180, .8);
}

.page-about .eco-card:hover {
  transform: translateY(-4px);
  background: #243B35;
}

.page-about .eco-card__mark {
  display: block;
  font-size: clamp(22px, 2.4vw, 30px);
  line-height: 1;
  color: var(--c-teal);
  letter-spacing: -.03em;
}

.page-about .eco-card--amber .eco-card__mark {
  color: var(--c-amber);
}

.page-about .eco-card--slate .eco-card__mark {
  color: var(--c-slate);
  font-size: clamp(16px, 1.7vw, 20px);
}

.page-about .eco-card h3 {
  margin: 14px 0 10px;
  font-size: clamp(16px, 1.8vw, 19px);
  color: var(--c-mist);
}

.page-about .eco-card p {
  margin: 0;
  font-size: 13px;
  line-height: 1.85;
  color: var(--c-slate);
}

.page-about .eco-card__hint {
  margin-top: 14px !important;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  font-size: 12px !important;
  color: rgba(54, 242, 192, .55) !important;
  transition: color .18s ease;
}

.page-about .eco-card:hover .eco-card__hint {
  color: var(--c-teal) !important;
}

.page-about .about-eco__more {
  margin: clamp(24px, 3vw, 36px) 0 0;
  font-size: 14px;
}

.page-about .about-eco__more a {
  color: var(--c-teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(54, 242, 192, .45);
  padding-bottom: 2px;
  transition: border-color .16s ease, color .16s ease;
}

.page-about .about-eco__more a:hover,
.page-about .about-eco__more a:focus-visible {
  color: var(--c-mist);
  border-bottom-color: var(--c-mist);
}

/* ---------- 服务与联系 ---------- */
.page-about .about-service__panel {
  display: grid;
  gap: clamp(26px, 3.4vw, 48px);
  padding: clamp(22px, 3.4vw, 46px);
  border: 1px solid var(--line-soft);
}

.page-about .about-service__intro h2 {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.2vw, 38px);
  line-height: 1.2;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--c-mist);
}

.page-about .about-service__intro p {
  margin: 16px 0 0;
  max-width: 520px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--about-lede);
}

.page-about .about-service__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-service__contact {
  padding-top: clamp(20px, 2.6vw, 28px);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-service__note {
  margin: 20px 0 0;
  font-size: 12px;
  line-height: 1.8;
  color: var(--c-slate);
}

.page-about .about-service__icp {
  margin: 16px 0 0;
  font-size: 11px;
  letter-spacing: .08em;
  color: rgba(145, 168, 180, .7);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-service__contact {
    border-top: 1px solid var(--line-soft);
  }
}

@media (min-width: 780px) {
  .page-about .about-eco__cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-eco__cards .eco-card:nth-child(2) {
    transform: translateY(18px);
  }

  .page-about .about-eco__cards .eco-card:nth-child(2):hover {
    transform: translateY(14px);
  }
}

@media (min-width: 860px) {
  .page-about {
    --about-axis: 64px;
  }

  .page-about .about-origin__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    padding-bottom: 64px;
  }

  .page-about .about-origin__item:nth-child(2) {
    transform: translateY(32px);
  }

  .page-about .about-origin__item:nth-child(3) {
    transform: translateY(64px);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: end;
  }
}

@media (min-width: 960px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .85fr);
    align-items: start;
  }

  .page-about .about-service__panel {
    grid-template-columns: minmax(0, 1fr) minmax(0, .95fr);
  }

  .page-about .about-service__contact {
    padding-top: 0;
    border-top: 0;
    border-left: 1px solid var(--line-soft);
    padding-left: clamp(22px, 2.8vw, 36px);
  }
}

@media (max-width: 559px) {
  .page-about .about-hero__arc {
    opacity: .55;
    right: -30%;
  }

  .page-about .about-stats__item {
    grid-template-columns: 64px minmax(0, 1fr);
  }

  .page-about .about-hero__actions .btn,
  .page-about .about-service__actions .btn {
    flex: 1 1 100%;
    justify-content: center;
  }
}
<<<END>>>