.page-about {
  --about-rail: 220px;
}

.page-about .about-hero {
  padding-top: clamp(20px, 4vw, 48px);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(20px, 4vw, 40px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-hero__lead h1 {
  margin: 14px 0 20px;
}

.page-about .about-hero__lead .lede {
  max-width: 46ch;
}

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

.page-about .about-hero__side {
  border-left: 2px solid var(--cyan);
  padding: 4px 0 4px 20px;
}

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

.page-about .about-hero__side li {
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.page-about .about-hero__side strong {
  display: block;
  color: var(--cyan-mist);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(240px, 0.6fr);
    gap: 56px;
    align-items: end;
  }
}

.page-about .about-metrics {
  list-style: none;
  margin: clamp(36px, 6vw, 64px) 0 0;
  padding: clamp(20px, 3vw, 28px) 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.page-about .about-metric__value {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.5rem, 3.4vw, 2.25rem);
  line-height: 1.05;
  color: var(--cyan);
  letter-spacing: -0.01em;
}

.page-about .about-metric__label {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.65;
}

@media (min-width: 860px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 28px;
  }
}

.page-about .about-head {
  max-width: 64ch;
}

.page-about .about-head h2 {
  margin: 12px 0 14px;
}

.page-about .about-head__note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--amber);
}

/* 服务三线 */
.page-about .about-services__list {
  margin-top: clamp(32px, 5vw, 56px);
  border-top: 1px solid var(--line);
}

.page-about .about-service {
  display: grid;
  gap: 12px;
  padding: clamp(24px, 4vw, 38px) 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-service__index {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-service h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.01em;
  font-size: clamp(1.25rem, 2.2vw, 1.6rem);
}

.page-about .about-service p {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.85;
  max-width: 56ch;
}

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

.page-about .about-service__link {
  align-self: start;
  justify-self: start;
  color: var(--cyan);
  font-size: 0.9375rem;
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 240, 228, 0.35);
  padding-bottom: 2px;
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .about-service__link:hover {
  color: var(--cyan-mist);
  border-color: var(--cyan-mist);
}

@media (min-width: 900px) {
  .page-about .about-service {
    grid-template-columns: 72px minmax(0, 1fr) 190px;
    align-items: start;
    gap: 32px;
  }
}

/* 版本轨道 */
.page-about .about-eras__band {
  position: relative;
  margin: 0 0 clamp(28px, 5vw, 56px);
  border: 1px solid var(--line);
  border-radius: var(--radius-panel);
  overflow: hidden;
}

.page-about .about-eras__band img {
  display: block;
  width: 100%;
  height: auto;
  opacity: 0.55;
}

.page-about .about-eras__band::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(5, 9, 18, 0.92), rgba(5, 9, 18, 0.12) 55%, rgba(5, 9, 18, 0.8));
  pointer-events: none;
}

.page-about .about-eras__caption {
  position: absolute;
  left: clamp(16px, 3vw, 28px);
  bottom: clamp(14px, 2.4vw, 22px);
  z-index: 1;
  color: var(--cyan-mist);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
}

.page-about .about-timeline {
  display: grid;
  gap: 28px;
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .about-timeline__rail {
  position: relative;
}

.page-about .about-timeline__rail ol {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-timeline__rail a {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease), background-color 0.3s var(--ease);
}

.page-about .about-timeline__rail a:hover,
.page-about .about-timeline__rail a:focus-visible {
  color: var(--cyan-mist);
  border-color: var(--cyan);
  background: rgba(63, 240, 228, 0.07);
}

.page-about .about-timeline__curve {
  display: none;
}

.page-about .about-timeline__track {
  display: grid;
  gap: 18px;
}

.page-about .about-era {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: clamp(22px, 3.4vw, 34px);
  transition: border-color 0.4s var(--ease), transform 0.4s var(--ease);
  scroll-margin-top: 140px;
}

.page-about .about-era:hover {
  transform: translateY(-3px);
}

.page-about .about-era:target {
  border-color: var(--cyan);
}

.page-about .about-era__tag {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-era h3 {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.01em;
  font-size: clamp(1.2rem, 2vw, 1.5rem);
}

.page-about .about-era p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.85;
  max-width: 58ch;
}

.page-about .about-era--current {
  background: linear-gradient(180deg, rgba(255, 138, 60, 0.12), rgba(12, 23, 48, 1) 62%);
  border-color: rgba(255, 138, 60, 0.45);
}

.page-about .about-era--current .about-era__tag {
  color: var(--orange);
}

@media (min-width: 960px) {
  .page-about .about-timeline {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-timeline__rail {
    position: sticky;
    top: 128px;
  }

  .page-about .about-timeline__rail ol {
    display: block;
    overflow: visible;
    padding: 10px 0 10px 26px;
  }

  .page-about .about-timeline__rail li {
    position: relative;
  }

  .page-about .about-timeline__rail li::before {
    content: "";
    position: absolute;
    left: -21px;
    top: 19px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--panel-lift);
    border: 1px solid var(--line);
    transition: background-color 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
  }

  .page-about .about-timeline__rail li:hover::before {
    background: var(--cyan);
    border-color: var(--cyan);
    box-shadow: 0 0 12px rgba(63, 240, 228, 0.6);
  }

  .page-about .about-timeline__rail a {
    display: block;
    border: 0;
    padding: 12px 0;
    background: none;
  }

  .page-about .about-timeline__rail a:hover,
  .page-about .about-timeline__rail a:focus-visible {
    background: none;
  }

  .page-about .about-timeline__curve {
    display: block;
    position: absolute;
    left: 0;
    top: 0;
    width: 16px;
    height: 100%;
  }
}

/* 数据流程 */
.page-about .about-flow__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}

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

.page-about .about-flow__media img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-flow__steps {
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
}

.page-about .about-flow__steps li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-flow__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.875rem;
  color: var(--orange);
  padding-top: 3px;
}

.page-about .about-flow__steps h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
}

.page-about .about-flow__steps p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.8;
  max-width: 48ch;
}

@media (min-width: 980px) {
  .page-about .about-flow__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .about-flow__media {
    position: sticky;
    top: 128px;
  }
}

/* 团队 */
.page-about .about-team__grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .about-team__unit {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: clamp(20px, 2.4vw, 28px);
  transition: transform 0.4s var(--ease), border-color 0.4s var(--ease);
}

.page-about .about-team__unit:hover {
  transform: translateY(-4px);
  border-color: var(--cyan);
}

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-team__unit h3 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
}

.page-about .about-team__unit p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.page-about .about-team__more {
  color: var(--amber);
  font-size: 0.875rem;
  opacity: 0.65;
  transition: opacity 0.35s var(--ease);
}

.page-about .about-team__unit:hover .about-team__more {
  opacity: 1;
}

.page-about .about-team__total {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 0.9375rem;
}

.page-about .about-team__total strong {
  color: var(--text);
  font-family: var(--font-mono);
}

@media (min-width: 900px) {
  .page-about .about-team__grid {
    grid-template-columns: 21fr 11fr 6fr;
    align-items: stretch;
  }
}

/* 合作生态 */
.page-about .about-partners__media {
  margin: 0 0 clamp(28px, 4vw, 48px);
}

.page-about .about-partners__media img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-partners__grid {
  display: grid;
  gap: 24px;
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .about-partner {
  padding-left: 18px;
  border-left: 2px solid var(--line);
  transition: border-color 0.35s var(--ease);
}

.page-about .about-partner:hover {
  border-color: var(--orange);
}

.page-about .about-partner__count {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-about .about-partner h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
}

.page-about .about-partner p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.8;
}

@media (min-width: 860px) {
  .page-about .about-partners__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
  }
}

/* 标准清单 */
.page-about .about-standards__grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .about-standard {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: clamp(22px, 2.6vw, 30px);
  overflow: hidden;
  transition: border-color 0.35s var(--ease);
}

.page-about .about-standard::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--cyan), rgba(63, 240, 228, 0));
  opacity: 0.55;
}

.page-about .about-standard:hover {
  border-color: rgba(63, 240, 228, 0.55);
}

.page-about .about-standard__index {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .about-standard h3 {
  margin: 12px 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
}

.page-about .about-standard p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.page-about .about-standard__more {
  margin-top: 12px;
  color: var(--amber);
  font-size: 0.875rem;
  opacity: 0.5;
  transition: opacity 0.35s var(--ease);
}

.page-about .about-standard:hover .about-standard__more {
  opacity: 1;
}

@media (min-width: 760px) {
  .page-about .about-standards__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .about-standards__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* 下一步入口 */
.page-about .about-cta {
  display: grid;
  gap: 28px;
  padding: clamp(26px, 5vw, 56px);
  border: 1px solid var(--line);
  border-radius: var(--radius-panel);
  background: linear-gradient(140deg, rgba(8, 43, 51, 0.95), rgba(12, 23, 48, 0.98));
}

.page-about .about-cta h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.015em;
  font-size: clamp(1.5rem, 2.8vw, 2.25rem);
}

.page-about .about-cta p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.85;
  max-width: 48ch;
}

.page-about .about-cta__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-cta__links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  color: var(--text);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease), background-color 0.3s var(--ease);
}

.page-about .about-cta__links a:hover,
.page-about .about-cta__links a:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan-mist);
  background: rgba(63, 240, 228, 0.07);
}

.page-about .about-cta__links span {
  font-family: var(--font-mono);
  color: var(--cyan);
}

@media (min-width: 900px) {
  .page-about .about-cta {
    grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
    align-items: center;
    gap: 48px;
  }
}

@media (max-width: 420px) {
  .page-about .about-service__tags {
    gap: 6px;
  }

  .page-about .about-flow__steps li {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 12px;
  }
}
<<<END>>>