.page-about {
  --about-gap: clamp(18px, 3vw, 36px);
  --about-rail: rgba(157, 177, 203, .18);
  background: var(--ink-900);
  color: var(--mist);
  font-family: var(--font-sans);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about .reading {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: -.02em;
}

.page-about .about-head {
  max-width: 62ch;
  margin-bottom: clamp(22px, 3.4vw, 40px);
}

.page-about .section-title {
  font-size: clamp(25px, 3.6vw, 40px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -.02em;
  margin: 10px 0 14px;
}

.page-about .section-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--cyan);
  margin: 0;
}

.page-about .lede {
  font-size: 16px;
  color: var(--slate);
  margin: 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(18px, 3vw, 34px) 0 clamp(40px, 6vw, 84px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(92% 78% at 88% -8%, rgba(10, 108, 255, .30), transparent 62%),
    radial-gradient(72% 62% at -8% 112%, rgba(0, 229, 195, .12), transparent 66%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(0deg, rgba(157, 177, 203, .05) 0 1px, transparent 1px 6px);
  opacity: .55;
}

.page-about .about-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--blue-soft);
  margin: 18px 0 10px;
}

.page-about .about-hero h1 {
  font-size: clamp(31px, 6.2vw, 62px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.03em;
  margin: 0 0 18px;
  max-width: 15ch;
}

.page-about .about-hero .lede {
  max-width: 46ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
}

.page-about .about-metrics {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin-top: clamp(22px, 3.4vw, 38px);
  border-top: 1px solid var(--line-strong);
}

.page-about .about-metric {
  padding: 16px 0 14px;
  border-bottom: 1px dashed var(--about-rail);
}

.page-about .about-metric-label {
  display: block;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--slate);
  margin-bottom: 4px;
}

.page-about .about-metric-value {
  display: block;
  font-size: clamp(34px, 5.4vw, 50px);
  font-weight: 800;
  line-height: 1.05;
  color: var(--mist);
}

.page-about .about-metric-value i {
  font-style: normal;
  font-size: .4em;
  font-weight: 500;
  color: var(--slate);
  margin-left: 6px;
  letter-spacing: 0;
  font-family: var(--font-sans);
}

.page-about .about-metric--cyan .about-metric-value {
  color: var(--cyan);
}

.page-about .about-metric--dim .about-metric-value {
  color: var(--blue-soft);
}

.page-about .about-hero-visual {
  margin: 0;
  position: relative;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ink-800);
}

.page-about .about-hero-visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-about .about-hero-visual figcaption {
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--slate);
  background: rgba(6, 17, 31, .74);
  border-left: 2px solid var(--cyan);
  padding: 7px 10px;
  border-radius: 2px 8px 8px 2px;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  padding-top: clamp(44px, 6vw, 82px);
}

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

.page-about .year-node {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-left: 3px solid rgba(10, 108, 255, .55);
  border-radius: var(--radius-md);
  background: linear-gradient(150deg, rgba(11, 31, 54, .95), rgba(11, 31, 54, .5));
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .year-node:hover {
  border-color: var(--cyan);
}

.page-about .year-node--now {
  border-left-color: var(--orange);
}

.page-about .year-mark {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .year-num {
  font-size: clamp(30px, 6vw, 54px);
  font-weight: 900;
  line-height: 1;
  color: var(--blue-soft);
}

.page-about .year-node:nth-child(even) .year-num {
  color: var(--cyan);
}

.page-about .year-node--now .year-num {
  font-size: clamp(26px, 5vw, 46px);
  color: var(--mist);
}

.page-about .year-body h3 {
  font-size: 17px;
  font-weight: 800;
  line-height: 1.4;
  margin: 0 0 8px;
  color: var(--mist);
}

.page-about .year-body p {
  margin: 0;
  font-size: 15px;
  color: var(--slate);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-top: clamp(44px, 6vw, 82px);
}

.page-about .about-team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 46px);
}

.page-about .about-cards {
  display: grid;
  gap: 12px;
}

.page-about .about-card {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(11, 31, 54, .78);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

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

.page-about .about-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
}

.page-about .about-card-head h3 {
  font-size: 16px;
  font-weight: 800;
  margin: 0;
  color: var(--mist);
}

.page-about .about-card p {
  margin: 0;
  font-size: 15px;
  color: var(--slate);
}

.page-about .about-team-aside {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-team-visual {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--ink-800);
}

.page-about .about-team-visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 10 / 7;
}

.page-about .about-stat-stack {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 10px;
}

.page-about .about-stat {
  padding: 14px 14px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--ink-800);
}

.page-about .about-stat-num {
  display: block;
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 900;
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-stat-label {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--slate);
}

/* ---------- 覆盖与伙伴 ---------- */
.page-about .about-coverage {
  position: relative;
  margin-top: clamp(44px, 6vw, 84px);
  padding: clamp(46px, 7vw, 88px) 0;
  overflow: hidden;
  background: var(--ink-850);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-coverage-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.page-about .about-coverage-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .22;
  filter: saturate(.8);
}

.page-about .about-coverage::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 17, 31, .92), rgba(6, 17, 31, .62) 45%, rgba(6, 17, 31, .95));
  pointer-events: none;
}

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

.page-about .partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .partner-card {
  padding: 20px 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background: rgba(11, 31, 54, .82);
  transition: border-color var(--dur) var(--ease);
}

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

.page-about .partner-num {
  display: block;
  font-size: clamp(38px, 6vw, 56px);
  font-weight: 900;
  line-height: 1;
  color: var(--cyan);
  margin-bottom: 8px;
}

.page-about .partner-card:nth-child(2) .partner-num {
  color: var(--blue-soft);
}

.page-about .partner-card:nth-child(3) .partner-num {
  color: var(--orange);
}

.page-about .partner-card h3 {
  font-size: 16px;
  font-weight: 800;
  margin: 0 0 6px;
  color: var(--mist);
}

.page-about .partner-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .coverage-band {
  margin-top: clamp(20px, 3vw, 32px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .coverage-band-item {
  background: rgba(6, 17, 31, .86);
  padding: 16px 18px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 14px;
}

.page-about .coverage-band-label {
  font-size: 13px;
  color: var(--slate);
}

.page-about .coverage-band-value {
  font-size: clamp(22px, 3.4vw, 30px);
  font-weight: 800;
  color: var(--mist);
  line-height: 1.1;
}

.page-about .coverage-band-value i {
  font-style: normal;
  font-size: .46em;
  font-weight: 500;
  color: var(--slate);
  margin-left: 5px;
  font-family: var(--font-sans);
}

/* ---------- 适配方法 ---------- */
.page-about .about-method {
  padding-top: clamp(46px, 6.5vw, 88px);
}

.page-about .check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .check-item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 4px;
  border-bottom: 1px solid var(--line);
  transition: background-color var(--dur) var(--ease);
}

.page-about .check-item:hover {
  background: rgba(10, 108, 255, .08);
}

.page-about .check-num {
  font-size: 19px;
  font-weight: 800;
  color: var(--cyan);
  line-height: 1.5;
}

.page-about .check-body h3 {
  font-size: 16px;
  font-weight: 800;
  margin: 0 0 4px;
  color: var(--mist);
}

.page-about .check-body p {
  margin: 0;
  font-size: 15px;
  color: var(--slate);
}

.page-about .cadence {
  margin-top: clamp(26px, 4vw, 44px);
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(140deg, rgba(10, 108, 255, .14), rgba(11, 31, 54, .9) 60%);
}

.page-about .cadence-title {
  font-size: 16px;
  font-weight: 800;
  margin: 0 0 16px;
  color: var(--mist);
}

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

.page-about .cadence-card {
  padding-left: 14px;
  border-left: 2px solid rgba(0, 229, 195, .5);
}

.page-about .cadence-value {
  display: block;
  font-size: 24px;
  font-weight: 900;
  color: var(--cyan);
  line-height: 1.2;
}

.page-about .cadence-card p {
  margin: 4px 0 0;
  font-size: 14px;
  color: var(--slate);
}

/* ---------- 收束区 ---------- */
.page-about .about-next {
  margin-top: clamp(44px, 6vw, 84px);
  padding: clamp(38px, 6vw, 74px) 0 clamp(30px, 4vw, 48px);
  background:
    radial-gradient(80% 120% at 100% 0%, rgba(255, 122, 26, .16), transparent 58%),
    radial-gradient(70% 100% at 0% 100%, rgba(10, 108, 255, .18), transparent 62%);
  border-top: 1px solid var(--line);
}

.page-about .about-next-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 42px);
}

.page-about .about-next-text .section-title {
  margin-top: 10px;
}

.page-about .about-next-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-about .next-link {
  display: block;
  padding: 15px 18px;
  text-decoration: none;
  color: var(--mist);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  background: rgba(11, 31, 54, .8);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .next-link:hover,
.page-about .next-link:focus-visible {
  border-color: var(--cyan);
  transform: translateY(-2px);
  background: rgba(18, 43, 71, .92);
}

.page-about .next-link-title {
  display: block;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: .01em;
}

.page-about .next-link-desc {
  display: block;
  margin-top: 3px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate);
}

.page-about .next-link--accent {
  border-color: rgba(255, 122, 26, .7);
  background: linear-gradient(120deg, rgba(255, 122, 26, .22), rgba(11, 31, 54, .86));
}

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

.page-about .next-link--accent .next-link-title {
  color: #FFD3B0;
}

.page-about .about-backtop-wrap {
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-backtop {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

.page-about a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-metric {
    padding: 16px 16px 14px 0;
    border-bottom: 0;
    border-right: 1px dashed var(--about-rail);
  }

  .page-about .about-metric + .about-metric {
    padding-left: 18px;
  }

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

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

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

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

@media (min-width: 860px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: end;
  }

  .page-about .about-hero-visual {
    align-self: stretch;
  }

  .page-about .about-hero-visual img {
    height: 100%;
    aspect-ratio: auto;
    min-height: 340px;
  }

  .page-about .year-node {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 26px;
    align-items: start;
    padding: 24px 24px 24px 22px;
  }

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

  .page-about .about-next-inner {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    align-items: start;
  }
}

@media (min-width: 1020px) {
  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr);
    align-items: start;
  }

  .page-about .about-team-aside {
    position: sticky;
    top: 96px;
  }

  .page-about .about-hero h1 {
    max-width: 14ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-card,
  .page-about .next-link,
  .page-about .year-node,
  .page-about .partner-card {
    transition: none;
  }

  .page-about .about-card:hover,
  .page-about .next-link:hover,
  .page-about .next-link:focus-visible {
    transform: none;
  }
}
<<<END>>>