.page-about {
  --about-line: rgba(91, 107, 140, 0.28);
  --about-cyan-glow: rgba(61, 225, 255, 0.16);
  --about-gold-glow: rgba(246, 200, 106, 0.14);
  --about-coral-glow: rgba(255, 107, 107, 0.14);
  overflow-wrap: break-word;
}

.page-about .gxy-breadcrumb {
  padding-top: clamp(18px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(28px, 5vw, 64px) 0 clamp(26px, 4vw, 52px);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: min(200px, 42%);
  height: 2px;
  background: linear-gradient(90deg, var(--gxy-cyan), transparent);
}

.page-about .about-hero .gxy-title--xl {
  margin: clamp(10px, 2vw, 18px) 0 0;
  max-width: 14em;
  letter-spacing: -0.01em;
}

.page-about .about-hero__lead {
  margin-top: clamp(14px, 2.4vw, 22px);
  max-width: 44em;
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  border-radius: var(--gxy-radius);
  overflow: hidden;
}

.page-about .about-stats li {
  background: var(--gxy-bg-2);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-stats strong {
  font-family: var(--gxy-font-display);
  font-size: clamp(24px, 5.5vw, 36px);
  line-height: 1.1;
  font-weight: 800;
  color: var(--gxy-ink);
}

.page-about .about-stats li:nth-child(1) strong { color: var(--gxy-cyan); }
.page-about .about-stats li:nth-child(2) strong { color: var(--gxy-gold); }
.page-about .about-stats li:nth-child(3) strong { color: var(--gxy-ink); }
.page-about .about-stats li:nth-child(4) strong { color: var(--gxy-coral); }

.page-about .about-stats span {
  font-size: 13px;
  color: var(--gxy-muted);
  letter-spacing: 0.02em;
}

/* ---------- 起点 ---------- */
.page-about .about-prose {
  margin-top: clamp(12px, 2vw, 20px);
  max-width: 40em;
}

.page-about .about-order {
  list-style: none;
  counter-reset: step;
  margin: clamp(22px, 3.5vw, 34px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-order li {
  counter-increment: step;
  position: relative;
  flex: 1 1 180px;
  min-width: 0;
  padding: 16px 16px 16px 46px;
  background: var(--gxy-panel);
  border: 1px solid var(--about-line);
  border-left: 2px solid var(--gxy-line);
  font-size: 15px;
  color: var(--gxy-ink);
}

.page-about .about-order li::before {
  content: "0" counter(step);
  position: absolute;
  left: 16px;
  top: 17px;
  font-family: var(--gxy-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gxy-muted);
}

.page-about .about-order li:nth-child(1) { border-left-color: var(--gxy-cyan); }
.page-about .about-order li:nth-child(2) { border-left-color: var(--gxy-gold); }
.page-about .about-order li:nth-child(3) { border-left-color: var(--gxy-coral); }

/* ---------- 版本轨道 ---------- */
.page-about .about-track__head .gxy-title {
  margin: 10px 0 0;
  max-width: 22em;
}

.page-about .about-track__head .gxy-lead {
  margin-top: 14px;
  max-width: 42em;
}

.page-about .about-track__grid {
  margin-top: clamp(24px, 4vw, 40px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .about-rail {
  position: relative;
  padding-left: 26px;
}

.page-about .about-rail::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--gxy-cyan), var(--gxy-gold) 52%, var(--gxy-coral));
  opacity: 0.5;
}

.page-about .about-stage {
  position: relative;
  margin-bottom: 14px;
  background: var(--gxy-panel);
  border: 1px solid var(--about-line);
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 19px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gxy-line);
  box-shadow: 0 0 0 4px rgba(91, 107, 140, 0.16);
}

.page-about .about-stage--cyan::before {
  background: var(--gxy-cyan);
  box-shadow: 0 0 0 4px var(--about-cyan-glow), 0 0 14px rgba(61, 225, 255, 0.5);
}

.page-about .about-stage--gold::before {
  background: var(--gxy-gold);
  box-shadow: 0 0 0 4px var(--about-gold-glow), 0 0 14px rgba(246, 200, 106, 0.45);
}

.page-about .about-stage--coral::before {
  background: var(--gxy-coral);
  box-shadow: 0 0 0 4px var(--about-coral-glow), 0 0 14px rgba(255, 107, 107, 0.4);
}

.page-about .about-stage__summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) 18px;
  gap: 6px 14px;
  align-items: baseline;
  padding: 16px 18px;
}

.page-about .about-stage__summary::-webkit-details-marker { display: none; }

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

.page-about .about-stage__title {
  font-family: var(--gxy-font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--gxy-ink);
  line-height: 1.5;
}

.page-about .about-stage__mark {
  position: relative;
  width: 12px;
  height: 12px;
  align-self: center;
  margin-left: auto;
  border-right: 2px solid var(--gxy-muted);
  border-bottom: 2px solid var(--gxy-muted);
  transform: rotate(45deg) translateY(-2px);
  transition: transform 0.22s ease;
}

.page-about .about-stage[open] .about-stage__mark {
  transform: rotate(225deg) translateY(-2px);
}

.page-about .about-stage__body {
  padding: 0 18px 18px;
  border-top: 1px solid var(--about-line);
  margin-top: 2px;
  color: var(--gxy-muted);
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-stage__body p { margin: 14px 0 0; }

/* ---------- 图像容器 ---------- */
.page-about .about-figure {
  margin: 0;
  position: relative;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--about-line);
  border-radius: var(--gxy-radius);
  background: var(--gxy-bg-2);
}

.page-about .about-figure__cap {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gxy-muted);
}

.page-about .about-figure--wide {
  margin-top: clamp(26px, 4vw, 44px);
}

/* ---------- 三类主题 ---------- */
.page-about .about-methods .gxy-title {
  margin: 10px 0 0;
  max-width: 20em;
}

.page-about .about-methods .gxy-lead {
  margin-top: 14px;
  max-width: 42em;
}

.page-about .about-filterbar {
  margin: clamp(20px, 3vw, 28px) 0 clamp(20px, 3vw, 26px);
}

.page-about .about-methodgrid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gxy-gap);
}

.page-about .about-card {
  position: relative;
  padding: 20px 20px 24px;
  background-color: var(--gxy-panel);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

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

.page-about .about-card__line {
  display: block;
  width: 44px;
  height: 3px;
  margin-bottom: 14px;
  background: var(--gxy-line);
}

.page-about .about-card--cyan .about-card__line { background: var(--gxy-cyan); box-shadow: 0 0 12px rgba(61, 225, 255, 0.55); }
.page-about .about-card--gold .about-card__line { background: var(--gxy-gold); box-shadow: 0 0 12px rgba(246, 200, 106, 0.5); }
.page-about .about-card--coral .about-card__line { background: var(--gxy-coral); box-shadow: 0 0 12px rgba(255, 107, 107, 0.45); }

.page-about .about-card .gxy-tag {
  display: inline-block;
  margin: 0 0 10px;
}

.page-about .about-card h3 {
  margin: 0 0 10px;
  font-size: 18px;
  line-height: 1.5;
}

.page-about .about-card p {
  margin: 0;
  color: var(--gxy-muted);
  font-size: 15px;
  line-height: 1.8;
}

/* ---------- 团队 ---------- */
.page-about .about-team .gxy-title {
  margin: 10px 0 0;
  max-width: 20em;
}

.page-about .about-team .gxy-lead {
  margin-top: 14px;
  max-width: 42em;
}

.page-about .about-groups {
  margin-top: clamp(22px, 3.5vw, 36px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gxy-gap);
}

.page-about .about-group {
  padding: 20px;
  border: 1px solid var(--about-line);
  background: linear-gradient(160deg, rgba(61, 225, 255, 0.06), transparent 62%);
  border-top: 2px solid var(--gxy-line);
}

.page-about .about-group--cyan { border-top-color: var(--gxy-cyan); }
.page-about .about-group--gold { border-top-color: var(--gxy-gold); background: linear-gradient(160deg, rgba(246, 200, 106, 0.07), transparent 62%); }
.page-about .about-group--coral { border-top-color: var(--gxy-coral); background: linear-gradient(160deg, rgba(255, 107, 107, 0.07), transparent 62%); }

.page-about .about-group .gxy-mono {
  margin: 0 0 8px;
  display: block;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gxy-muted);
}

.page-about .about-group h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.page-about .about-group p {
  margin: 0;
  color: var(--gxy-muted);
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-docs {
  margin-top: var(--gxy-gap);
  padding: clamp(20px, 3vw, 28px);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  border: 1px solid var(--about-line);
  background: linear-gradient(115deg, rgba(246, 200, 106, 0.1), rgba(61, 225, 255, 0.06) 70%);
}

.page-about .about-docs h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.page-about .about-docs p {
  margin: 0;
  color: var(--gxy-muted);
  font-size: 15px;
  line-height: 1.8;
  max-width: 40em;
}

/* ---------- 覆盖 ---------- */
.page-about .about-cover .gxy-title {
  margin: 10px 0 0;
  max-width: 22em;
}

.page-about .about-cover__grid {
  margin-top: clamp(22px, 3.5vw, 36px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .about-cover__text .gxy-lead {
  margin-top: 0;
  max-width: 38em;
}

.page-about .about-points {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-points li {
  position: relative;
  padding-left: 20px;
  color: var(--gxy-muted);
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gxy-line);
  box-shadow: 0 0 8px rgba(91, 107, 140, 0.6);
}

.page-about .about-points .gxy-mono {
  margin-right: 6px;
  font-size: 13px;
}

.page-about .about-cover__links {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 页尾引导 ---------- */
.page-about .about-outro {
  margin-top: clamp(40px, 6vw, 76px);
  padding: clamp(28px, 5vw, 56px) 0;
  border-top: 1px solid var(--about-line);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  align-items: center;
}

.page-about .about-outro .gxy-mono {
  margin: 0 0 10px;
  display: block;
  letter-spacing: 0.1em;
}

.page-about .about-outro .gxy-title {
  margin: 0 0 12px;
  max-width: 18em;
}

.page-about .about-outro__text {
  margin: 0;
  color: var(--gxy-muted);
  font-size: 15px;
  line-height: 1.8;
  max-width: 40em;
}

.page-about .about-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-outro__actions .gxy-btn {
  flex: 0 1 auto;
}

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

  .page-about .about-docs {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

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

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

@media (min-width: 900px) {
  .page-about .about-track__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

  .page-about .about-cover__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
  }

  .page-about .about-figure--wide {
    margin-top: clamp(28px, 3vw, 40px);
  }

  .page-about .about-outro {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }
}

@media (min-width: 1100px) {
  .page-about .about-methodgrid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-methodgrid > .about-card:nth-child(3n + 2) {
    margin-top: 22px;
  }

  .page-about .about-methodgrid > .about-card:nth-child(3n + 3) {
    margin-top: 44px;
  }

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

  .page-about .about-groups > .about-group:nth-child(2) {
    margin-top: 16px;
  }
}

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