.page-about {
  --about-gap: clamp(44px, 7vw, 92px);
  --about-radius: var(--r-lg);
  background: var(--ink);
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 4vw, 44px) 0 clamp(36px, 6vw, 76px);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(79, 216, 196, 0.14), transparent 62%),
    linear-gradient(118deg, transparent 0 44%, rgba(198, 255, 79, 0.05) 44% 55%, transparent 55%),
    linear-gradient(22deg, transparent 0 70%, rgba(255, 107, 44, 0.07) 70% 100%);
}
.page-about .about-hero .shell {
  position: relative;
}
.page-about .breadcrumb {
  margin-bottom: clamp(20px, 4vw, 40px);
}
.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 46px);
  align-items: end;
}
.page-about .about-hero-copy h1 {
  margin: 0.28em 0 0.55em;
  font-size: clamp(30px, 7vw, 52px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: 0.05em;
  color: var(--paper);
}
.page-about .eyebrow {
  color: var(--lime);
  letter-spacing: 0.14em;
}
.page-about .about-lede {
  max-width: 58ch;
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.88;
}
.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}
.page-about .about-hero-media {
  border-radius: var(--about-radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--surface);
}
.page-about .about-hero-media .media-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .about-hero-media .media-caption {
  display: block;
  padding: 10px 14px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
  background: rgba(6, 18, 15, 0.82);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 4.5vw, 46px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}
.page-about .about-facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  background: var(--surface);
}
.page-about .about-fact-num {
  font-size: clamp(22px, 3.4vw, 30px);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--lime);
  line-height: 1;
}
.page-about .about-facts li:nth-child(2) .about-fact-num { color: var(--cyan); }
.page-about .about-facts li:nth-child(3) .about-fact-num { color: var(--amber); }
.page-about .about-facts li:nth-child(4) .about-fact-num { color: var(--orange); }
.page-about .about-fact-label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 时间线 ---------- */
.page-about .about-history .section-title {
  max-width: 22ch;
}
.page-about .about-timeline {
  margin-top: clamp(22px, 4vw, 38px);
}
.page-about .tl-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: clamp(22px, 3.6vw, 34px) 0;
  border-top: 1px solid var(--line);
}
.page-about .tl-item:last-child {
  border-bottom: 1px solid var(--line);
}
.page-about .tl-year {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  letter-spacing: 0.1em;
  color: var(--lime);
}
.page-about .tl-year::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--line), transparent);
}
.page-about .tl-body h3 {
  margin: 0 0 10px;
  font-size: clamp(18px, 2.6vw, 21px);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--paper);
}
.page-about .tl-body p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.82;
}
.page-about .tl-body p:last-child {
  margin-bottom: 0;
}

/* ---------- 三条内容线 ---------- */
.page-about .line-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: clamp(22px, 4vw, 36px);
}
.page-about .line-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 8px 16px;
  padding: clamp(20px, 3.4vw, 30px) 0;
  border-top: 1px solid var(--line);
}
.page-about .line-row:last-child {
  border-bottom: 1px solid var(--line);
}
.page-about .line-index {
  font-size: 26px;
  line-height: 1;
  color: var(--line);
  letter-spacing: 0.06em;
}
.page-about .line-row:nth-child(1) .line-index { color: var(--lime); }
.page-about .line-row:nth-child(2) .line-index { color: var(--cyan); }
.page-about .line-row:nth-child(3) .line-index { color: var(--orange); }
.page-about .line-main h3 {
  margin: 0 0 8px;
  font-size: clamp(17px, 2.5vw, 20px);
  font-weight: 700;
  letter-spacing: 0.03em;
}
.page-about .line-main p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.82;
}
.page-about .line-tag {
  grid-column: 2;
  margin-top: 4px;
}

/* ---------- 版本面板 ---------- */
.page-about .version-wrap {
  position: relative;
  margin-top: clamp(22px, 4vw, 38px);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  overflow: hidden;
  background: var(--glass);
}
.page-about .version-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
  pointer-events: none;
}
.page-about .version-scroller {
  position: relative;
  display: flex;
  gap: 14px;
  overflow-x: auto;
  padding: clamp(18px, 3vw, 30px);
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-color: var(--line) transparent;
}
.page-about .version-scroller:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -4px;
}
.page-about .version-card {
  flex: 0 0 min(290px, 78vw);
  scroll-snap-align: start;
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(11, 31, 26, 0.88);
}
.page-about .version-card .v-num {
  display: block;
  font-size: clamp(34px, 8vw, 54px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.08em;
  color: var(--lime);
  margin-bottom: 14px;
}
.page-about .version-card:nth-child(2) .v-num { color: var(--cyan); }
.page-about .version-card:nth-child(3) .v-num { color: var(--amber); }
.page-about .version-card:nth-child(4) .v-num { color: var(--orange); }
.page-about .version-card h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--paper);
}
.page-about .version-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .team-share {
  display: flex;
  height: 18px;
  margin-top: clamp(22px, 4vw, 34px);
  border-radius: 3px;
  overflow: hidden;
  gap: 2px;
}
.page-about .team-share .seg {
  display: block;
  height: 100%;
  transition: filter 120ms ease;
}
.page-about .team-share .seg-edit { flex: 12 1 0; background: var(--lime); }
.page-about .team-share .seg-check { flex: 8 1 0; background: var(--cyan); }
.page-about .team-share .seg-prod { flex: 6 1 0; background: var(--orange); }
.page-about .team-share .seg:hover { filter: brightness(1.18); }

.page-about .team-list {
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .team-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 6px 12px;
  align-items: center;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}
.page-about .team-row:last-child {
  border-bottom: 1px solid var(--line);
}
.page-about .team-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}
.page-about .team-dot--edit { background: var(--lime); }
.page-about .team-dot--check { background: var(--cyan); }
.page-about .team-dot--prod { background: var(--orange); }
.page-about .team-name {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.03em;
}
.page-about .team-count {
  font-size: 14px;
  color: var(--amber);
  letter-spacing: 0.05em;
}
.page-about .team-task {
  grid-column: 1 / -1;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 协作网络 ---------- */
.page-about .collab {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background: var(--surface);
}
.page-about .collab-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.22;
  pointer-events: none;
}
.page-about .collab-inner {
  position: relative;
  padding: clamp(24px, 4.5vw, 52px);
  background: linear-gradient(180deg, rgba(11, 31, 26, 0.9), rgba(11, 31, 26, 0.72));
}
.page-about .flow {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: clamp(22px, 3.6vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .flow-step {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(6, 18, 15, 0.7);
}
.page-about .flow-index {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--lime);
}
.page-about .flow-title {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--paper);
}
.page-about .flow-desc {
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}
.page-about .flow-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  transform: rotate(90deg);
  opacity: 0.9;
}
.page-about .collab-tail {
  margin: clamp(20px, 3vw, 28px) 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.82;
}
.page-about .collab-tail a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 79, 0.42);
}
.page-about .collab-tail a:hover {
  border-bottom-color: var(--lime);
}

/* ---------- 服务与联系 ---------- */
.page-about .about-service-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 44px);
  align-items: start;
}
.page-about .about-service-main p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.88;
  color: var(--paper);
  opacity: 0.85;
}
.page-about .about-service-main .section-title {
  margin: 0.3em 0 0.7em;
}
.page-about .about-service-main .mono {
  color: var(--amber);
  font-size: 14px;
  word-break: break-all;
}
.page-about .about-service-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 3vw, 26px);
}
.page-about .service-card {
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--surface);
}
.page-about .service-card-title {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}
.page-about .service-meta {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.page-about .service-meta li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}
.page-about .service-meta li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.page-about .service-meta .muted {
  font-size: 12px;
  letter-spacing: 0.08em;
}
.page-about .service-meta strong {
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
  letter-spacing: 0.02em;
}
.page-about .service-hint {
  margin: 16px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .about-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .line-row {
    grid-template-columns: 56px minmax(0, 1fr) auto;
    align-items: start;
  }
  .page-about .line-tag {
    grid-column: 3;
    margin-top: 6px;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
  }
  .page-about .about-facts {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
  .page-about .tl-item {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: clamp(20px, 4vw, 54px);
  }
  .page-about .tl-year {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .page-about .tl-year::after {
    width: 100%;
    flex: 0 0 1px;
  }
  .page-about .tl-item:nth-child(2) .tl-body { max-width: 62ch; padding-right: 6%; }
  .page-about .tl-item:nth-child(3) .tl-body { max-width: 54ch; }
  .page-about .tl-item:nth-child(4) .tl-body { max-width: 58ch; padding-left: 5%; }

  .page-about .team-row {
    grid-template-columns: auto 132px 76px minmax(0, 1fr);
    gap: 6px 18px;
  }
  .page-about .team-task {
    grid-column: auto;
  }

  .page-about .flow {
    flex-direction: row;
    align-items: stretch;
    gap: 8px;
  }
  .page-about .flow-arrow {
    transform: none;
    flex: 0 0 44px;
  }
  .page-about .flow-step {
    flex: 1 1 0;
  }

  .page-about .about-service-grid {
    grid-template-columns: 1.45fr 0.85fr;
  }
}

@media (min-width: 1100px) {
  .page-about .version-card {
    flex-basis: 320px;
  }
  .page-about .about-hero-media {
    margin-bottom: -8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-share .seg {
    transition: none;
  }
}
<<<END>>>