.page-about {
  position: relative;
  overflow: hidden;
  --about-dot: rgba(143, 163, 191, 0.07);
}

.page-about::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--about-dot) 1px, transparent 1px),
    linear-gradient(to bottom, var(--about-dot) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, #000 48%, transparent 82%);
  mask-image: linear-gradient(to bottom, #000 0%, #000 48%, transparent 82%);
}

.page-about > section {
  position: relative;
  z-index: 1;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding: clamp(28px, 6vw, 68px) 0 clamp(24px, 4vw, 44px);
}

.page-about .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .about-hero h1 {
  font-family: var(--font-cond);
  font-weight: 800;
  font-size: clamp(2rem, 7.2vw, 4rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 12px 0 0;
  max-width: 17ch;
}

.page-about .about-hl {
  color: var(--lime);
  font-family: var(--font-mono);
  letter-spacing: 0;
}

.page-about .about-lede {
  margin: 20px 0 0;
  max-width: 44ch;
  font-size: 1.06rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(28px, 5vw, 48px);
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-figure {
  background: rgba(11, 27, 51, 0.78);
  padding: 18px 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-figure__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.7rem, 5vw, 2.5rem);
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--lime);
}

.page-about .about-figure__unit {
  font-size: 0.55em;
  margin-left: 2px;
  color: var(--amber);
}

.page-about .about-figure__label {
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 通用区块 ---------- */

.page-about .about-block {
  padding: clamp(48px, 7.5vw, 96px) 0;
}

.page-about .about-aside {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-left: 16px;
  border-left: 1px solid var(--line);
  margin-bottom: 26px;
}

.page-about .about-index {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.24em;
  color: var(--lime);
  margin: 0;
}

.page-about .about-index--dark {
  color: var(--orange);
}

.page-about .section-title {
  font-family: var(--font-cond);
  font-weight: 800;
  font-size: clamp(1.6rem, 5vw, 2.6rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--white);
  margin: 0;
}

.page-about .about-note {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--mist);
  margin: 0;
}

.page-about .about-note--wide {
  margin-top: 32px;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
  max-width: 52ch;
  line-height: 1.8;
}

.page-about .about-text p {
  margin: 0 0 1.15em;
  font-size: 1rem;
  line-height: 1.82;
  color: var(--white);
  opacity: 0.86;
  max-width: 40em;
}

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

.page-about .about-text__lead {
  margin: 0;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--mist);
  max-width: 40em;
}

/* ---------- 团队（浅底） ---------- */

.page-about .about-team {
  background-color: var(--cream);
  background-image: radial-gradient(rgba(28, 22, 16, 0.05) 1px, transparent 1px);
  background-size: 6px 6px;
}

.page-about .about-team .section-title {
  color: var(--paper-ink);
}

.page-about .about-team .about-text__lead {
  color: rgba(28, 22, 16, 0.72);
  margin-top: 14px;
}

.page-about .about-team__main {
  margin-bottom: 34px;
}

.page-about .team-bars {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-about .team-bar__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
}

.page-about .team-bar__name {
  font-weight: 700;
  font-size: 1rem;
  color: var(--paper-ink);
}

.page-about .team-bar__num {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: rgba(28, 22, 16, 0.62);
}

.page-about .team-bar__track {
  display: block;
  height: 10px;
  margin-top: 9px;
  background: rgba(28, 22, 16, 0.1);
  overflow: hidden;
}

.page-about .team-bar__fill {
  display: block;
  height: 100%;
  transition: width 500ms ease;
}

.page-about .team-bar--edit .team-bar__fill {
  width: 36%;
  background: var(--navy);
}

.page-about .team-bar--tech .team-bar__fill {
  width: 43%;
  background: var(--navy-2);
}

.page-about .team-bar--care .team-bar__fill {
  width: 21%;
  background: var(--orange);
}

.page-about .team-bar__desc {
  margin: 8px 0 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: rgba(28, 22, 16, 0.66);
  max-width: 36em;
}

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

.page-about .about-team__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ---------- 数据来源 ---------- */

.page-about .about-sources__viz {
  margin-bottom: 32px;
}

.page-about .source-rings {
  width: 100%;
  max-width: 260px;
  height: auto;
  display: block;
}

.page-about .source-legend {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .source-legend li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .source-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-top: 6px;
  flex: none;
}

.page-about .source-dot--lime { background: var(--lime); }
.page-about .source-dot--amber { background: var(--amber); }
.page-about .source-dot--orange { background: var(--orange); }

.page-about .about-sources__body .section-title {
  margin-bottom: 20px;
}

.page-about .source-facts {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .source-fact {
  background: rgba(18, 41, 74, 0.6);
  padding: 14px 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
}

.page-about .source-fact__k {
  font-family: var(--font-mono);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--amber);
  min-width: 8.5em;
}

.page-about .source-fact__v {
  font-size: 0.9rem;
  color: var(--mist);
}

/* ---------- 里程碑时间轴 ---------- */

.page-about .about-milestones__head {
  margin-bottom: 12px;
}

.page-about .about-milestones__intro .about-text__lead {
  margin-bottom: 4px;
}

.page-about .about-filter {
  margin-top: 24px;
}

.page-about .timeline {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 6px;
  bottom: 40px;
  width: 1px;
  background: linear-gradient(to bottom, var(--lime), rgba(143, 163, 191, 0.28) 62%, transparent);
}

.page-about .tl-node {
  position: relative;
  padding: 0 0 34px 38px;
}

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 6px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--navy);
  border: 2px solid var(--lime);
  box-sizing: border-box;
}

.page-about .tl-node--now::before {
  background: var(--lime);
  box-shadow: 0 0 0 5px rgba(200, 255, 77, 0.16);
}

.page-about .tl-node[hidden] {
  display: none;
}

.page-about .tl-node__meta {
  margin: 0 0 8px;
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .tl-node__year {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  color: var(--lime);
}

.page-about .tl-node--now .tl-node__year {
  color: var(--orange);
}

.page-about .tl-node__ver {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--mist);
  border: 1px solid var(--line);
  padding: 2px 8px;
}

.page-about .tl-node__title {
  margin: 0 0 10px;
  font-family: var(--font-cond);
  font-weight: 800;
  font-size: clamp(1.15rem, 3.6vw, 1.5rem);
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--white);
}

.page-about .tl-node__text {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--mist);
  max-width: 42em;
}

.page-about .about-tlfigure {
  margin: 24px 0 0;
  border: 1px solid var(--line);
  background: rgba(18, 41, 74, 0.42);
}

.page-about .about-tlfigure img {
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  display: block;
}

.page-about .about-tlfigure figcaption {
  padding: 12px 16px;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--mist);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 服务覆盖 ---------- */

.page-about .about-coverage__figure {
  margin-bottom: 32px;
}

.page-about .about-coverage__figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-about .about-coverage__body .section-title {
  margin-bottom: 20px;
}

.page-about .about-promises {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-promise {
  background: rgba(18, 41, 74, 0.58);
  padding: 18px 18px 20px;
  backdrop-filter: blur(6px);
}

.page-about .about-promise__k {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--orange);
  margin-bottom: 10px;
}

.page-about .about-promise__t {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.01em;
}

.page-about .about-promise__d {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 行动入口 ---------- */

.page-about .about-cta {
  padding-bottom: clamp(56px, 8vw, 110px);
}

.page-about .about-cta__inner {
  border-top: 1px solid var(--line);
  padding-top: clamp(28px, 4vw, 44px);
  display: grid;
  gap: 24px;
}

.page-about .about-cta__text h2 {
  font-family: var(--font-cond);
  font-weight: 800;
  font-size: clamp(1.4rem, 4.4vw, 2.1rem);
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--white);
  margin: 0 0 12px;
}

.page-about .about-cta__text p {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--mist);
  max-width: 44em;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-aside {
    position: sticky;
    top: 118px;
    align-self: start;
    margin-bottom: 0;
  }

  .page-about .about-split .about-text {
    padding-top: 4px;
  }

  .page-about .about-team__main {
    margin-bottom: 0;
  }

  .page-about .about-sources__viz {
    margin-bottom: 0;
  }

  .page-about .about-coverage__figure {
    margin-bottom: 0;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: end;
    gap: 40px;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }

  .page-about .timeline::before {
    left: 79px;
    bottom: 46px;
  }

  .page-about .tl-node {
    display: grid;
    grid-template-columns: 100px minmax(0, 1fr);
    column-gap: 60px;
    padding-left: 0;
    padding-bottom: 40px;
  }

  .page-about .tl-node::before {
    left: 72px;
    top: 7px;
  }

  .page-about .tl-node__meta {
    grid-column: 1;
    grid-row: 1 / span 2;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    margin-top: 2px;
  }

  .page-about .tl-node__title {
    grid-column: 2;
    grid-row: 1;
    margin-top: 0;
  }

  .page-about .tl-node__text {
    grid-column: 2;
    grid-row: 2;
  }
}

@media (min-width: 1100px) {
  .page-about .about-tlfigure {
    margin-top: 34px;
  }

  .page-about .about-note--wide {
    margin-left: 160px;
  }
}

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