.page-about {
  --about-edge: rgba(185, 217, 223, 0.32);
  --about-soft: rgba(247, 250, 250, 0.8);
  --about-panel: rgba(247, 250, 250, 0.06);
}

/* ---------- 页面上下文 ---------- */
.page-about .about-crumb {
  margin: 0 0 1.4rem;
  padding: 0;
  list-style: none;
  position: relative;
  z-index: 2;
}

.page-about .about-crumb li {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 12px;
  letter-spacing: 0.05em;
}

.page-about .about-crumb li + li::before {
  content: "/";
  opacity: 0.45;
}

.page-about .about-crumb a {
  color: var(--c-ice);
  text-decoration: none;
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--c-orange);
}

.page-about .about-crumb [aria-current="page"] {
  color: var(--c-orange);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  right: -20%;
  top: -32%;
  width: min(760px, 92vw);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 42% 46%, rgba(255, 106, 43, 0.26), rgba(255, 106, 43, 0) 66%);
  pointer-events: none;
}

.page-about .about-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 5vw, 3.25rem);
}

.page-about .about-kicker {
  margin: 0 0 0.9rem;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-orange);
}

.page-about .about-hero h1 {
  margin: 0;
  color: var(--c-snow);
  font-size: clamp(2.3rem, 7vw, 4rem);
  line-height: 0.98;
  letter-spacing: 0.01em;
  max-width: 16ch;
}

.page-about .about-lede {
  margin: 1.35rem 0 0;
  max-width: 34em;
  font-size: clamp(1rem, 2.4vw, 1.08rem);
  line-height: 1.85;
  color: var(--about-soft);
}

.page-about .about-jump {
  margin-top: 2rem;
}

.page-about .about-jump-label {
  display: block;
  margin-bottom: 0.7rem;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--c-ice);
}

.page-about .about-jump ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-jump a {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 0.95rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--about-edge);
  color: var(--c-snow);
  font-size: 13px;
  text-decoration: none;
  transition: border-color var(--speed) var(--ease), color var(--speed) var(--ease), background var(--speed) var(--ease);
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  border-color: var(--c-orange);
  color: var(--c-orange);
  background: rgba(255, 106, 43, 0.1);
}

.page-about .jump-idx {
  font-size: 11px;
  color: var(--c-orange);
}

.page-about .about-facts {
  display: grid;
  gap: 0.9rem;
  margin: 0;
  padding: clamp(1.2rem, 3vw, 1.6rem);
  border-radius: var(--r-lg);
  border: 1px solid rgba(185, 217, 223, 0.24);
  background: var(--about-panel);
}

.page-about .about-facts > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid rgba(185, 217, 223, 0.16);
}

.page-about .about-facts > div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-facts dt {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-ice);
}

.page-about .about-facts dd {
  margin: 0;
  font-family: var(--font-data);
  font-size: 15px;
  font-weight: 600;
  color: var(--c-snow);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 2.6rem);
  align-items: start;
}

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

.page-about .about-sec-title {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.7rem, 4.6vw, 2.35rem);
  line-height: 1.14;
  color: var(--c-teal);
}

.page-about .about-body p {
  margin: 0 0 1rem;
  max-width: 36em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--c-ink);
}

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

.page-about .about-quote {
  margin: 1.6rem 0 0;
  padding: clamp(1.15rem, 3vw, 1.75rem);
  max-width: 34em;
  border-radius: var(--r-xl);
  background: linear-gradient(135deg, var(--c-teal), var(--c-deep));
  color: var(--c-snow);
  font-size: 1rem;
  line-height: 1.78;
}

.page-about .about-note {
  margin-top: 1.5rem !important;
  padding: 0.9rem 1.1rem;
  border-radius: var(--r-md);
  border-left: 4px solid var(--c-orange);
  background: var(--c-white);
  font-size: 15px !important;
  line-height: 1.75 !important;
  color: var(--c-ink);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  position: relative;
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: linear-gradient(140deg, var(--c-deep), var(--c-teal-bright));
}

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

.page-about .about-figure figcaption {
  position: absolute;
  left: 0.9rem;
  bottom: 0.9rem;
  padding: 0.35rem 0.8rem;
  border-radius: var(--r-pill);
  background: rgba(7, 52, 61, 0.82);
  color: var(--c-snow);
  font-size: 11px;
  letter-spacing: 0.1em;
}

.page-about .about-figure--team {
  margin-top: 1.6rem;
}

.page-about .about-figure--wide {
  margin-top: 1.75rem;
}

/* ---------- 团队四象限 ---------- */
.page-about .about-quad {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.page-about .about-quad .card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: clamp(1.1rem, 3vw, 1.55rem);
  border-radius: var(--r-lg);
  transition: transform var(--speed) var(--ease), border-color var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
}

.page-about .about-quad .card:hover,
.page-about .about-quad .card:focus-within {
  transform: translateY(-4px);
  border-color: var(--c-orange);
  box-shadow: 0 18px 34px -24px rgba(7, 52, 61, 0.7);
}

.page-about .quad-idx {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--c-orange-deep);
}

.page-about .about-quad .card-title {
  margin: 0;
}

.page-about .about-quad .card-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
}

/* ---------- 三层校验 ---------- */
.page-about .about-steps {
  position: relative;
  margin-top: 1.6rem;
  padding-left: 1.9rem;
}

.page-about .about-steps::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 0.9rem;
  bottom: 0.9rem;
  width: 2px;
  background: linear-gradient(180deg, var(--c-orange), var(--c-teal-bright));
}

.page-about .about-step {
  position: relative;
  padding-bottom: 1.9rem;
}

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

.page-about .about-step::before {
  content: "";
  position: absolute;
  left: -1.9rem;
  top: 0.3rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--c-snow);
  border: 3px solid var(--c-orange);
}

.page-about .step-tag {
  display: inline-block;
  margin-bottom: 0.4rem;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--c-orange-deep);
}

.page-about .about-step h3 {
  margin: 0 0 0.45rem;
  font-size: 1.15rem;
  color: var(--c-teal);
}

.page-about .about-step p {
  margin: 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-ink);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin-top: 1.6rem;
  padding-left: 1.6rem;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 0.6rem;
  bottom: 0.6rem;
  width: 2px;
  background: linear-gradient(180deg, var(--c-teal), var(--c-teal-bright) 60%, var(--c-orange));
}

.page-about .about-node {
  position: relative;
  padding: clamp(1rem, 2.6vw, 1.35rem);
  border-radius: var(--r-lg);
  background: var(--c-white);
  border: 1px solid var(--c-rime);
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -1.6rem;
  top: 1.15rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-white);
  border: 3px solid var(--c-teal);
}

.page-about .node-year {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-orange-deep);
}

.page-about .about-node .card-title {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
}

.page-about .about-node .card-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
}

/* ---------- 生态 ---------- */
.page-about .about-eco-head {
  max-width: 46rem;
  margin-bottom: clamp(1.5rem, 4vw, 2.2rem);
}

.page-about .about-eco-head .anno {
  display: inline-block;
  margin-bottom: 0.6rem;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--c-orange-deep);
}

.page-about .about-body--lead {
  margin: 0;
  max-width: 40em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--c-ink);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-bottom: clamp(1.5rem, 4vw, 2.2rem);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--c-rime);
}

.page-about .about-stat {
  padding: clamp(1.05rem, 3vw, 1.5rem);
  background: var(--c-white);
}

.page-about .about-stat b {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  line-height: 1;
  color: var(--c-teal);
}

.page-about .about-stat span {
  display: block;
  margin-top: 0.45rem;
  font-size: 13px;
  line-height: 1.5;
  color: var(--c-ink);
}

.page-about .about-eco-body p {
  margin: 0 0 1rem;
  max-width: 40em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--c-ink);
}

.page-about .about-pills {
  margin-top: 1.4rem;
}

/* ---------- 服务标准 ---------- */
.page-about .about-standards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
}

.page-about .about-standard {
  padding: 1.15rem 1.25rem;
  border-radius: var(--r-md);
  background: var(--c-white);
  border: 1px solid var(--c-rime);
  border-left: 4px solid var(--c-orange);
}

.page-about .std-time {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--c-orange-deep);
}

.page-about .about-standard .card-title {
  margin: 0 0 0.4rem;
  font-size: 1.02rem;
  color: var(--c-teal);
}

.page-about .about-standard .card-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-ink);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.3rem;
  padding: clamp(1.6rem, 4vw, 2.6rem);
  border-radius: var(--r-xl);
  background: linear-gradient(135deg, var(--c-teal), var(--c-deep));
  color: var(--c-snow);
}

.page-about .about-cta h2 {
  margin: 0 0 0.6rem;
  color: var(--c-snow);
}

.page-about .about-cta-text {
  margin: 0;
  max-width: 32em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-soft);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.7rem;
}

.page-about .about-cta-link {
  color: var(--c-ice);
  font-size: 14px;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-about .about-cta-link:hover,
.page-about .about-cta-link:focus-visible {
  color: var(--c-orange);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .about-quad {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.1rem;
    padding-left: 0;
    padding-top: 2.4rem;
  }

  .page-about .about-timeline::before {
    left: 0;
    right: 0;
    top: 11px;
    bottom: auto;
    width: auto;
    height: 2px;
    background: linear-gradient(90deg, var(--c-teal), var(--c-teal-bright) 55%, var(--c-orange));
  }

  .page-about .about-node::before {
    left: 0;
    top: -1.8rem;
    width: 10px;
    height: 10px;
  }

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

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 940px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: end;
  }

  .page-about .about-chapter {
    grid-template-columns: 56px minmax(0, 0.94fr) minmax(0, 1.06fr);
    gap: clamp(1.6rem, 3.5vw, 3rem);
  }

  .page-about .about-chapter--solo {
    grid-template-columns: 56px minmax(0, 1fr);
  }

  .page-about .about-chapter--stack {
    grid-template-columns: 56px minmax(0, 0.94fr) minmax(0, 1.06fr);
  }

  .page-about .about-chapter--stack .about-quad {
    grid-column: 2 / -1;
    margin-top: 1.4rem;
  }

  .page-about .about-chapter--stack .about-team-lead {
    display: contents;
  }

  .page-about .about-chapter--stack .about-team-lead > h2,
  .page-about .about-chapter--stack .about-team-lead > p {
    grid-column: 2;
  }

  .page-about .about-chapter--stack .about-team-lead > h2 {
    grid-row: 1;
  }

  .page-about .about-chapter--stack .about-team-lead > p {
    grid-row: 2;
  }

  .page-about .about-chapter--stack .about-figure--team {
    grid-column: 3;
    grid-row: 1 / span 2;
    margin-top: 0;
  }

  .page-about .about-chapter--stack .about-rail {
    grid-row: 1 / span 3;
  }

  .page-about .about-rail {
    display: block;
    padding-top: 0.35rem;
  }

  .page-about .about-rail .anno--vertical {
    font-size: 11px;
    letter-spacing: 0.3em;
    color: var(--c-teal-bright);
  }
}
<<<END>>>