.page-about {
  --about-rail: 56px;
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + clamp(24px, 5vw, 56px)) var(--pad) clamp(36px, 6vw, 72px);
  background:
    radial-gradient(115% 78% at 88% -10%, rgba(47, 107, 255, .18), transparent 62%),
    radial-gradient(80% 60% at 5% 105%, rgba(0, 232, 209, .08), transparent 70%),
    var(--ink);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 46%;
  right: -12%;
  width: 52%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan-soft), transparent);
  transform: rotate(-15deg);
  opacity: .7;
  pointer-events: none;
}

.page-about .about-hero-top {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  align-items: center;
  justify-content: space-between;
  max-width: var(--maxw);
  margin: 0 auto clamp(26px, 4.5vw, 46px);
}

.page-about .about-hero-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-about .about-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 5vw, 52px);
  max-width: var(--maxw);
  margin: 0 auto;
  align-items: start;
}

.page-about .about-hero-main h1 {
  margin: .34em 0 .5em;
  font-family: var(--font-head);
  font-size: clamp(32px, 5.6vw, 66px);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--text);
}

.page-about .about-lede {
  margin: 0;
  max-width: 38em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-lede--sub {
  margin-top: 1.1em;
  padding-left: 14px;
  border-left: 2px solid var(--cyan);
  font-size: 15px;
  color: var(--muted);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3.6vw, 34px);
}

.page-about .about-hero-side {
  padding: clamp(18px, 3vw, 26px);
}

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

.page-about .about-fact {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  align-items: baseline;
  justify-content: space-between;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}

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

.page-about .about-fact-k {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-about .about-fact-v {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--text);
}

.page-about .about-fact-v b {
  font-size: 22px;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .section {
  padding: clamp(44px, 7vw, 88px) var(--pad);
}

.page-about .about-section-head {
  display: grid;
  gap: 14px;
  margin-bottom: clamp(26px, 5vw, 52px);
}

.page-about .about-section-head h2,
.page-about .about-origin-text h2,
.page-about .about-coverage-text h2,
.page-about .about-supply-text h2,
.page-about .about-next-inner h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(25px, 3.6vw, 44px);
  line-height: 1.18;
  letter-spacing: -.02em;
  color: var(--text);
}

.page-about .about-section-lede {
  margin: 0;
  max-width: 44em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

/* 起点与定位 */
.page-about .about-origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .about-origin-text h2 {
  margin: .3em 0 .7em;
}

.page-about .about-ticks {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-ticks li {
  position: relative;
  padding-left: 24px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-ticks li::before {
  content: "";
  position: absolute;
  left: 3px;
  top: .62em;
  width: 8px;
  height: 8px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.page-about .about-ticks strong {
  color: var(--text);
  font-weight: 600;
}

.page-about .about-origin-media {
  border-left: 1px solid var(--cyan-soft);
  padding-left: 1px;
}

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

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan-soft), var(--line) 26%, var(--line) 74%, transparent);
}

.page-about .about-stage {
  position: relative;
  display: grid;
  grid-template-columns: var(--about-rail) 1fr;
  gap: clamp(12px, 3vw, 32px);
  padding-bottom: clamp(30px, 5vw, 56px);
}

.page-about .about-stage:last-child {
  padding-bottom: 0;
}

.page-about .about-stage-rail {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 4px;
}

.page-about .about-stage-node {
  display: block;
  width: 11px;
  height: 11px;
  margin-top: 8px;
  background: var(--ink);
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
  transition: background-color .32s var(--ease), box-shadow .32s var(--ease);
}

.page-about .about-stage:hover .about-stage-node {
  background: var(--cyan);
  box-shadow: 0 0 0 6px rgba(0, 232, 209, .12);
}

.page-about .about-stage-index {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .about-stage-name {
  margin-top: 12px;
  writing-mode: vertical-rl;
  font-family: var(--font-head);
  font-size: 13px;
  letter-spacing: .34em;
  color: var(--muted);
  transition: color .32s var(--ease);
}

.page-about .about-stage:hover .about-stage-name {
  color: var(--text);
}

.page-about .about-stage-body h3 {
  margin: 0 0 .65em;
  font-family: var(--font-head);
  font-size: clamp(19px, 2.2vw, 25px);
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--text);
}

.page-about .about-stage-body p {
  margin: 0 0 .9em;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-stage-media {
  max-width: 420px;
  margin: 4px 0 18px;
}

.page-about .about-stage-foot {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: start;
  padding: 12px 16px;
  background: var(--ink-2);
  border-left: 2px solid var(--cyan);
}

.page-about .about-stage-foot span {
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--cyan);
  white-space: nowrap;
}

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

/* 团队 */
.page-about .about-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-team-card {
  position: relative;
  padding: 24px 22px 26px;
  background: var(--ink-2);
  border: 1px solid var(--line);
}

.page-about .about-team-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 46px;
  height: 2px;
  background: var(--cyan);
}

.page-about .about-team-card:nth-child(2)::before {
  background: var(--blue);
}

.page-about .about-team-card:nth-child(3)::before {
  background: var(--gold);
}

.page-about .about-team-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--text);
}

.page-about .about-team-num small {
  margin-left: 6px;
  font-size: .38em;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-about .about-team-card h3 {
  margin: 14px 0 8px;
  font-family: var(--font-head);
  font-size: 17px;
  letter-spacing: -.01em;
  color: var(--text);
}

.page-about .about-team-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-team-media {
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .about-team-note {
  margin: clamp(18px, 3vw, 28px) 0 0;
  max-width: 52em;
  padding-left: 16px;
  border-left: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

/* 服务覆盖 */
.page-about .about-coverage-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .about-coverage-text h2 {
  margin: .3em 0 .7em;
}

.page-about .about-coverage-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-coverage-list li {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 14px;
  align-items: baseline;
  padding: 16px 16px 18px;
  background: var(--ink-2);
}

.page-about .about-coverage-k {
  font-family: var(--font-mono);
  font-size: 17px;
  letter-spacing: .01em;
  color: var(--cyan);
}

.page-about .about-coverage-d {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* 质量校验 */
.page-about .about-quality-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .about-gates {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-gate {
  position: relative;
  padding: 20px 18px 22px;
  background: var(--ink-2);
  border-top: 2px solid var(--line);
}

.page-about .about-gate:nth-child(1) {
  border-top-color: var(--cyan);
}

.page-about .about-gate:nth-child(2) {
  border-top-color: var(--blue);
}

.page-about .about-gate:nth-child(3) {
  border-top-color: var(--gold);
}

.page-about .about-gate-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}

.page-about .about-gate h3 {
  margin: 8px 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  color: var(--text);
}

.page-about .about-gate p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-quality-panel {
  padding: clamp(20px, 3vw, 28px);
}

.page-about .about-quality-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-about .about-quality-value {
  margin: 6px 0 16px;
  font-family: var(--font-mono);
  font-size: clamp(40px, 7vw, 62px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--gold);
}

.page-about .about-quality-value span {
  margin-left: 4px;
  font-size: .36em;
  color: var(--gold-soft);
}

.page-about .about-cells {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 4px;
  margin: 0 0 14px;
  padding: 0;
}

.page-about .about-cell {
  display: block;
  aspect-ratio: 1 / 1;
  background: var(--line);
}

.page-about .about-cell.is-picked {
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(0, 232, 209, .38);
}

.page-about .about-quality-note {
  margin: 0 0 .8em;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

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

/* 供稿与合作 */
.page-about .about-supply-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 46px);
  align-items: start;
}

.page-about .about-supply-text h2 {
  margin: .3em 0 .7em;
}

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

.page-about .about-supply-stats li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  align-items: baseline;
  justify-content: space-between;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-supply-stats li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

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

.page-about .about-supply-v {
  font-family: var(--font-mono);
  font-size: 16px;
  letter-spacing: .02em;
  color: var(--gold);
}

/* 收束 */
.page-about .about-next {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, var(--ink-2), var(--ink));
}

.page-about .about-next-inner {
  max-width: 46em;
}

.page-about .about-next-inner p {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

@media (min-width: 720px) {
  .page-about .about-coverage-list li {
    grid-template-columns: 132px 1fr;
    padding: 18px 22px 20px;
  }

  .page-about .about-coverage-k {
    font-size: 20px;
  }
}

@media (min-width: 900px) {
  .page-about {
    --about-rail: 96px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: 1.38fr .62fr;
    gap: clamp(32px, 4vw, 64px);
  }

  .page-about .about-hero-side {
    margin-top: 12px;
  }

  .page-about .about-track::before {
    left: 47px;
  }

  .page-about .about-origin-grid {
    grid-template-columns: 1.15fr .85fr;
  }

  .page-about .about-origin-media {
    margin-top: 42px;
  }

  .page-about .about-team-grid {
    grid-template-columns: 1.18fr .88fr 1.34fr;
    align-items: stretch;
  }

  .page-about .about-team-card:nth-child(2) {
    margin-top: 26px;
  }

  .page-about .about-coverage-grid {
    grid-template-columns: 1.05fr .95fr;
  }

  .page-about .about-coverage-list {
    margin-top: 14px;
  }

  .page-about .about-quality-grid {
    grid-template-columns: 1.22fr .78fr;
  }

  .page-about .about-gates {
    grid-template-columns: 1.24fr 1fr 1.14fr;
    gap: 20px;
    align-items: start;
  }

  .page-about .about-gate:nth-child(2) {
    margin-top: 30px;
  }

  .page-about .about-gate:nth-child(3) {
    margin-top: 60px;
  }

  .page-about .about-supply-grid {
    grid-template-columns: 1.15fr .85fr;
  }

  .page-about .about-supply-stats {
    margin-top: 18px;
  }
}

@media (hover: hover) and (min-width: 900px) {
  .page-about .about-stage-foot {
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height .45s var(--ease), opacity .32s var(--ease),
                padding-top .35s var(--ease), padding-bottom .35s var(--ease);
  }

  .page-about .about-stage:hover .about-stage-foot,
  .page-about .about-stage:focus-within .about-stage-foot {
    max-height: 180px;
    padding-top: 12px;
    padding-bottom: 12px;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stage-node,
  .page-about .about-stage-name,
  .page-about .about-stage-foot {
    transition: none;
  }
}
<<<END>>>