.page-about {
  --about-line-soft: rgba(30, 59, 92, .7);
  --about-shadow: 0 18px 40px rgba(0, 0, 0, .45);
}

/* 面包屑 */
.page-about .breadcrumb {
  padding-top: clamp(18px, 3vw, 28px);
  padding-bottom: 4px;
  font-size: 13px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(20px, 3vw, 36px);
}

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

.page-about .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mint);
}

.page-about .hero-copy h1 {
  margin: 0 0 20px;
  font-size: clamp(36px, 8.2vw, 76px);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -.015em;
  color: var(--ink);
}

.page-about .hero-lede {
  margin: 0;
  max-width: 60ch;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.78;
  color: var(--ink);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .hero-side {
  position: relative;
  padding: 30px 26px 26px;
  padding-right: 62px;
  border: var(--line);
  border-radius: var(--radius);
  background: linear-gradient(158deg, var(--panel) 0%, var(--navy) 72%);
  overflow: hidden;
}

.page-about .hero-side::after {
  content: "";
  position: absolute;
  right: -40px;
  bottom: -60px;
  width: 190px;
  height: 190px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 106, 19, .26) 0%, transparent 70%);
  pointer-events: none;
}

.page-about .hero-side .annotation-v {
  position: absolute;
  top: 22px;
  right: 18px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-about .hero-side-num {
  margin: 6px 0 10px;
  font-family: var(--font-mono);
  font-size: clamp(50px, 11vw, 82px);
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
}

.page-about .hero-side-cap {
  margin: 0 0 20px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .hero-side-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
}

.page-about .hero-side-list li {
  display: flex;
  gap: 10px;
  align-items: baseline;
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(32px, 5vw, 56px);
  border: var(--line);
  border-radius: var(--radius);
  background: var(--steel);
  overflow: hidden;
}

.page-about .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 18px;
  background: var(--navy);
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
}

.page-about .stat-num em {
  margin-left: 2px;
  font-size: .46em;
  font-style: normal;
  color: var(--muted);
}

.page-about .stat:nth-child(2) .stat-num {
  color: var(--electro);
}

.page-about .stat:nth-child(3) .stat-num {
  color: var(--mint);
}

.page-about .stat:nth-child(4) .stat-num {
  color: var(--amber);
}

.page-about .stat-label {
  font-size: 13px;
  color: var(--muted);
}

/* ---------- 通用章节小件 ---------- */
.page-about .section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .section-lede {
  margin: 14px 0 30px;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 时间轴 ---------- */
.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 30px;
}

.page-about .timeline-layout {
  display: grid;
  gap: clamp(28px, 4vw, 46px);
}

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

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 14px;
  bottom: 22px;
  width: 1px;
  background: linear-gradient(180deg, var(--orange) 0%, var(--amber) 42%, var(--mint) 100%);
  opacity: .8;
}

.page-about .tl-item {
  position: relative;
  display: grid;
  gap: 10px;
  padding: 0 0 30px 38px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 8px;
  width: 11px;
  height: 11px;
  border: 2px solid var(--orange);
  border-radius: 50%;
  background: var(--navy);
}

.page-about .tl-item:last-child::before {
  border-color: var(--mint);
}

.page-about .tl-year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(28px, 6vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
}

.page-about .tl-body {
  padding: 16px 18px 18px;
  border: var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  transition: border-color 160ms ease, transform 160ms ease;
}

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

.page-about .tl-body h3 {
  margin: 10px 0 8px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .tl-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .tl-figure {
  margin: 0;
}

.page-about .tl-figure img,
.page-about .team-figure img,
.page-about .partners-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  object-fit: cover;
}

.page-about .tl-figure figcaption,
.page-about .team-figure figcaption,
.page-about .partners-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .team-band {
  display: flex;
  flex-direction: column;
  border: var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .band {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  min-width: 0;
  padding: 16px 18px;
  border-bottom: 1px solid var(--steel);
  transition: filter 160ms ease;
}

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

.page-about .band--ops {
  background: linear-gradient(90deg, rgba(20, 210, 160, .3) 0%, rgba(20, 210, 160, .08) 100%);
}

.page-about .band--dev {
  background: linear-gradient(90deg, rgba(59, 197, 255, .3) 0%, rgba(59, 197, 255, .08) 100%);
}

.page-about .band--care {
  background: linear-gradient(90deg, rgba(255, 106, 19, .34) 0%, rgba(255, 106, 19, .1) 100%);
}

.page-about .band:hover,
.page-about .band:focus-within {
  filter: brightness(1.4);
}

.page-about .band-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .band-num {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--ink);
  white-space: nowrap;
}

.page-about .team-figure {
  margin: 26px 0 0;
}

.page-about .team-cards {
  margin-top: 30px;
}

.page-about .team-card {
  padding: 20px 18px 18px;
  border: var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  transition: border-color 160ms ease, transform 160ms ease;
}

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

.page-about .team-card h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .team-card p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .team-card-foot {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--about-line-soft);
  font-size: 13px;
  color: var(--electro);
}

/* ---------- 内容节奏 ---------- */
.page-about .beat-row {
  display: grid;
  gap: 16px;
}

.page-about .beat {
  position: relative;
  padding: 24px 20px 20px;
  border: var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.page-about .beat::after {
  content: "";
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--orange), var(--mint));
  opacity: .7;
}

.page-about .beat-no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--amber);
}

.page-about .beat h3 {
  margin: 12px 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .beat p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .rhythm-prose {
  margin-top: 28px;
}

.page-about .prose {
  max-width: 70ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink);
}

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

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

/* ---------- 合作生态 ---------- */
.page-about .partners-layout {
  display: grid;
  gap: clamp(28px, 4vw, 46px);
  align-items: start;
}

.page-about .partners-figure {
  margin: 0;
}

.page-about .partners-copy h2 {
  margin: 0 0 16px;
  font-size: clamp(24px, 4.4vw, 34px);
  font-weight: 900;
  line-height: 1.24;
  color: var(--ink);
}

.page-about .partners-copy > p {
  margin: 0 0 24px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .partner-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.page-about .metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 16px 14px;
  border: var(--line);
  border-radius: var(--radius-sm);
  background: var(--navy);
}

.page-about .metric-num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 5vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--electro);
}

.page-about .metric:nth-child(2) .metric-num {
  color: var(--mint);
}

.page-about .metric-label {
  font-size: 13px;
  color: var(--muted);
}

.page-about .dot-field {
  display: block;
  height: 40px;
  margin-top: 4px;
  border-radius: 6px;
  background-image: radial-gradient(var(--electro) 1.5px, transparent 1.6px);
  background-size: 12px 12px;
  opacity: .45;
}

.page-about .metric:nth-child(2) .dot-field {
  background-image: radial-gradient(var(--mint) 1.5px, transparent 1.6px);
}

.page-about .partners-note {
  margin: 22px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
}

/* ---------- 资质与服务 ---------- */
.page-about .standard-grid {
  display: grid;
  gap: 16px;
}

.page-about .standard-card {
  padding: 22px 20px 20px;
  border: var(--line);
  border-radius: var(--radius);
  background: linear-gradient(150deg, var(--panel) 0%, var(--navy) 100%);
}

.page-about .standard-card h3 {
  margin: 12px 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .standard-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .standard-prose {
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid var(--about-line-soft);
}

.page-about .next-row {
  display: grid;
  gap: 14px;
  margin-top: clamp(30px, 5vw, 48px);
}

.page-about .next-link {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px;
  border: var(--line);
  border-radius: var(--radius);
  background: var(--navy);
  text-decoration: none;
  transition: border-color 160ms ease, transform 160ms ease;
}

.page-about .next-link:hover,
.page-about .next-link:focus-visible {
  border-color: var(--orange);
  transform: translateY(-2px);
}

.page-about .next-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mint);
}

.page-about .next-title {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}

/* ---------- 入场 ---------- */
.page-about [data-reveal] {
  animation: about-reveal 240ms ease-out both;
}

@keyframes about-reveal {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    animation: none;
  }
  .page-about .tl-body,
  .page-about .team-card,
  .page-about .next-link {
    transition: none;
  }
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .team-band {
    flex-direction: row;
    height: 96px;
  }

  .page-about .band {
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-end;
    border-bottom: 0;
    border-right: 1px solid var(--steel);
  }

  .page-about .band:last-child {
    border-right: 0;
  }

  .page-about .band--ops {
    flex: 18 1 0;
  }

  .page-about .band--dev {
    flex: 21 1 0;
  }

  .page-about .band--care {
    flex: 9 1 0;
  }

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

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

  .page-about .tl-item {
    grid-template-columns: 118px minmax(0, 1fr);
    align-items: start;
    gap: 18px;
    padding-left: 40px;
  }

  .page-about .tl-year {
    padding-top: 14px;
  }
}

@media (min-width: 960px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
  }

  .page-about .timeline-layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .tl-figure {
    position: sticky;
    top: 96px;
    margin-top: 8px;
  }

  .page-about .partners-layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 52px;
  }
}
<<<END>>>