.page-about {
  --ab-rule-line: rgba(18, 58, 46, 0.14);
  --ab-soft: #EDE7D8;
  background: var(--c-cream);
  color: var(--c-green);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.1;
  margin: 0;
}

.page-about p {
  margin: 0 0 1em;
}

.page-about a {
  color: var(--c-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .ab-gap {
  height: 8px;
  background: var(--c-moss);
}

.page-about .ab-gap--orange {
  background: var(--c-orange);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: 30px 0 46px;
  color: var(--c-cream);
  background: linear-gradient(158deg, #0A241C 0%, #123A2E 58%, #1A4A38 100%);
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(90deg, rgba(199, 208, 203, 0.08) 1px, transparent 1px),
    linear-gradient(0deg, rgba(199, 208, 203, 0.08) 1px, transparent 1px);
  background-size: 52px 52px;
}

.page-about .ab-hero .wrap {
  position: relative;
  z-index: 1;
}

.page-about .ab-hero .breadcrumbs {
  margin-bottom: 26px;
}

.page-about .ab-hero .eyebrow {
  color: var(--c-orange);
}

.page-about .ab-hero h1 {
  font-size: clamp(2.15rem, 7.5vw, 4.4rem);
  margin: 0 0 20px;
  max-width: 16em;
}

.page-about .ab-lede {
  font-size: 1.0625rem;
  line-height: 1.8;
  max-width: 40em;
  color: rgba(245, 241, 230, 0.86);
}

.page-about .ab-facts {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
}

.page-about .ab-facts li {
  border-top: 2px solid rgba(255, 106, 43, 0.55);
  padding-top: 12px;
}

.page-about .ab-fact-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 6vw, 2.1rem);
  color: var(--c-cream);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.page-about .ab-fact-num em {
  font-style: normal;
  font-size: 0.55em;
  color: var(--c-tin);
  margin-left: 2px;
}

.page-about .ab-fact-label {
  display: block;
  margin-top: 4px;
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--c-tin);
}

/* ---------- 通用章节 ---------- */
.page-about .ab-sec {
  position: relative;
  padding: 52px 0;
  overflow: hidden;
}

.page-about .ab-sec--cream {
  background: var(--c-cream);
}

.page-about .ab-sec--panel {
  background: var(--c-panel);
}

.page-about .ab-sec--green {
  background: var(--c-green);
  color: var(--c-cream);
}

.page-about .ab-sec h2 {
  font-size: clamp(1.55rem, 4.6vw, 2.5rem);
  margin: 10px 0 20px;
  max-width: 18em;
}

.page-about .ab-lead {
  max-width: 34em;
  color: var(--c-rock);
  margin-bottom: 26px;
}

.page-about .ab-sub {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--c-rock);
  margin-bottom: 14px;
}

.page-about .ab-wm {
  position: absolute;
  top: 8px;
  right: -0.06em;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(7rem, 28vw, 16rem);
  line-height: 0.82;
  color: var(--c-green);
  opacity: 0.06;
  pointer-events: none;
  user-select: none;
}

/* ---------- 起点 ---------- */
.page-about .ab-cols {
  display: grid;
  gap: 28px;
}

.page-about .ab-cols__main p {
  max-width: 38em;
}

.page-about .ab-aside {
  background: var(--c-panel);
  border-left: 5px solid var(--c-moss);
  border-radius: var(--radius);
  padding: 20px 20px 6px;
}

.page-about .ab-aside__title {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--c-rock);
  margin-bottom: 14px;
}

.page-about .ab-stats {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-about .ab-stats > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px dashed var(--ab-rule-line);
  padding-bottom: 10px;
}

.page-about .ab-stats dt {
  font-size: 0.9375rem;
  color: var(--c-rock);
}

.page-about .ab-stats dd {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--c-green);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.page-about .ab-stat-num {
  font-size: 1.375rem;
  color: var(--c-green);
}

/* ---------- 准则卡 ---------- */
.page-about .rules {
  display: grid;
  gap: 16px;
}

.page-about .rule {
  background: var(--c-cream);
  border: 1px solid var(--ab-rule-line);
  border-left: 6px solid var(--c-orange);
  border-radius: var(--radius);
}

.page-about .rule summary {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "num title"
    "flag flag";
  gap: 4px 14px;
  align-items: baseline;
  padding: 16px 18px;
  min-height: 44px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .rule-num {
  grid-area: num;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--c-orange);
}

.page-about .rule-title {
  grid-area: title;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--c-green);
}

.page-about .rule-flag {
  grid-area: flag;
  font-size: 0.9375rem;
  color: var(--c-rock);
  line-height: 1.6;
}

.page-about .rule[open] {
  background: var(--c-panel);
  box-shadow: 0 2px 0 var(--ab-rule-line);
}

.page-about .rule-body {
  padding: 2px 18px 18px;
  border-top: 1px dashed var(--ab-rule-line);
  margin-top: 2px;
  padding-top: 14px;
}

.page-about .rule-body p {
  font-size: 0.9688rem;
  color: #1E3B31;
  max-width: 40em;
}

.page-about .rule-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-weight: 700;
  font-size: 0.9375rem;
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 30px;
  position: relative;
  z-index: 1;
}

.page-about .team-grid__chart {
  display: grid;
  gap: 20px;
}

.page-about .ab-donut {
  width: 100%;
  max-width: 240px;
  height: auto;
  display: block;
  margin: 0 auto;
}

.page-about .ab-donut-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 34px;
  fill: #123A2E;
}

.page-about .ab-donut-cap {
  font-family: var(--font-body);
  font-size: 11px;
  fill: #6C7873;
  letter-spacing: 0.08em;
}

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

.page-about .legend-item {
  display: grid;
  grid-template-columns: 14px auto 1fr;
  grid-template-areas:
    "dot name num"
    ". role role";
  align-items: center;
  gap: 2px 10px;
  padding: 10px 12px;
  background: var(--c-panel);
  border-radius: var(--radius);
  border: 1px solid var(--ab-rule-line);
}

.page-about .legend-dot {
  grid-area: dot;
  width: 12px;
  height: 12px;
  border-radius: 3px;
}

.page-about .legend-dot--orange { background: var(--c-orange); }
.page-about .legend-dot--blue { background: var(--c-blue); }
.page-about .legend-dot--moss { background: var(--c-moss); }
.page-about .legend-dot--rock { background: var(--c-rock); }

.page-about .legend-name {
  grid-area: name;
  font-size: 0.9375rem;
  font-weight: 700;
}

.page-about .legend-num {
  grid-area: num;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--c-green);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.page-about .legend-role {
  grid-area: role;
  font-size: 0.8125rem;
  color: var(--c-rock);
  line-height: 1.5;
}

.page-about .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  counter-reset: flow;
}

.page-about .flow-item {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 12px 14px;
  background: var(--c-panel);
  border-radius: var(--radius);
  border: 1px solid var(--ab-rule-line);
}

.page-about .flow-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--c-blue);
}

.page-about .flow-text {
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* ---------- 图片 ---------- */
.page-about .ab-figure {
  margin: 30px 0 0;
  background: var(--c-deep);
  border-radius: var(--radius);
  overflow: hidden;
}

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

.page-about .ab-figure__cap {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--c-tin);
  background: var(--c-deep);
  padding: 10px 14px;
  line-height: 1.6;
}

.page-about .ab-figure--portrait {
  margin-top: 0;
}

.page-about .ab-figure--portrait img {
  aspect-ratio: 3 / 4;
}

/* ---------- 质量控制 ---------- */
.page-about .qc-grid {
  display: grid;
  gap: 26px;
}

.page-about .qc-list {
  display: grid;
  gap: 16px;
}

.page-about .qc-item {
  position: relative;
  padding: 16px 18px 16px 56px;
  background: var(--c-cream);
  border-radius: var(--radius);
  border-top: 3px solid var(--c-moss);
}

.page-about .qc-num {
  position: absolute;
  left: 16px;
  top: 16px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  color: var(--c-moss);
}

.page-about .qc-title {
  font-size: 1.125rem;
  margin-bottom: 6px;
  color: var(--c-green);
}

.page-about .qc-text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: #1E3B31;
}

.page-about .qc-foot {
  margin: 4px 0 0;
  padding: 14px 16px;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--c-green);
  background: rgba(78, 122, 92, 0.14);
  border-left: 4px solid var(--c-moss);
  border-radius: 0 var(--radius) var(--radius) 0;
}

/* ---------- 时间轴 ---------- */
.page-about .stage-wrap {
  position: relative;
  z-index: 1;
}

.page-about .stage-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-about .stage-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 26px;
}

.page-about .ab-chip {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 16px;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--c-green);
  background: var(--c-panel);
  border: 1px solid var(--ab-rule-line);
  border-radius: 999px;
  cursor: pointer;
  user-select: none;
  transition: background 180ms ease, color 180ms ease, border-color 180ms ease;
}

.page-about #stage-all:checked ~ .stage-bar label[for="stage-all"],
.page-about #stage-store:checked ~ .stage-bar label[for="stage-store"],
.page-about #stage-serve:checked ~ .stage-bar label[for="stage-serve"],
.page-about #stage-record:checked ~ .stage-bar label[for="stage-record"] {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: var(--c-deep);
}

.page-about #stage-all:focus-visible ~ .stage-bar label[for="stage-all"],
.page-about #stage-store:focus-visible ~ .stage-bar label[for="stage-store"],
.page-about #stage-serve:focus-visible ~ .stage-bar label[for="stage-serve"],
.page-about #stage-record:focus-visible ~ .stage-bar label[for="stage-record"] {
  outline: 3px solid var(--c-blue);
  outline-offset: 2px;
}

.page-about #stage-store:checked ~ .timeline .tl-item:not([data-stage="store"]),
.page-about #stage-serve:checked ~ .timeline .tl-item:not([data-stage="serve"]),
.page-about #stage-record:checked ~ .timeline .tl-item:not([data-stage="record"]) {
  display: none;
}

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

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  bottom: 18px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-moss), var(--c-orange));
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 26px 38px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-moss);
  box-shadow: 0 0 0 4px var(--c-cream);
}

.page-about .tl-item:last-child::before {
  background: var(--c-orange);
}

.page-about .tl-year {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  color: var(--c-orange);
  background: rgba(255, 106, 43, 0.12);
  border-radius: 3px;
  padding: 2px 8px;
  margin-bottom: 8px;
}

.page-about .tl-title {
  font-size: 1.125rem;
  margin-bottom: 6px;
}

.page-about .tl-text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: #1E3B31;
  max-width: 36em;
}

/* ---------- 合作生态 ---------- */
.page-about .ab-sec--green h2 {
  color: var(--c-cream);
}

.page-about .ab-sec--green .eyebrow {
  color: var(--c-orange);
}

.page-about .eco-grid {
  display: grid;
  gap: 26px;
  align-items: start;
}

.page-about .eco-grid__text p {
  max-width: 38em;
  color: rgba(245, 241, 230, 0.88);
}

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

.page-about .eco-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: baseline;
  padding: 14px 16px;
  background: rgba(10, 36, 28, 0.55);
  border: 1px solid rgba(199, 208, 203, 0.24);
  border-radius: var(--radius);
}

.page-about .eco-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--c-orange);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.page-about .eco-text {
  font-size: 0.9375rem;
  line-height: 1.55;
  color: rgba(245, 241, 230, 0.9);
}

.page-about .eco-link-line {
  margin: 24px 0 0;
}

.page-about .eco-link-line a {
  color: var(--c-orange);
  font-weight: 700;
}

/* ---------- 适合谁 ---------- */
.page-about .fit-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .fit-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 18px 18px 18px 16px;
  background: var(--c-panel);
  border-radius: var(--radius);
  border-left: 5px solid var(--c-moss);
}

.page-about .fit-item:nth-child(2) {
  border-left-color: var(--c-blue);
}

.page-about .fit-item:nth-child(3) {
  border-left-color: var(--c-clay);
}

.page-about .fit-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--c-green);
  opacity: 0.45;
}

.page-about .fit-title {
  font-size: 1.125rem;
  margin-bottom: 6px;
}

.page-about .fit-text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: #1E3B31;
  max-width: 40em;
}

/* ---------- 结尾 CTA ---------- */
.page-about .cta-box {
  margin-top: 34px;
  padding: 26px 20px;
  background: var(--c-green);
  color: var(--c-cream);
  border-radius: var(--radius);
  border-top: 6px solid var(--c-orange);
}

.page-about .cta-title {
  font-size: clamp(1.3rem, 4.5vw, 1.9rem);
  color: var(--c-cream);
  margin-bottom: 12px;
}

.page-about .cta-text {
  color: rgba(245, 241, 230, 0.85);
  font-size: 0.9375rem;
  max-width: 34em;
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.page-about .cta-actions .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.9375rem;
  text-decoration: none;
  border-radius: var(--radius);
}

.page-about .cta-actions .btn--primary {
  background: var(--c-orange);
  color: var(--c-deep);
  border: 2px solid var(--c-orange);
}

.page-about .cta-actions .btn--outline {
  background: transparent;
  color: var(--c-cream);
  border: 2px solid rgba(245, 241, 230, 0.6);
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .ab-hero {
    padding: 42px 0 60px;
  }

  .page-about .ab-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .ab-sec {
    padding: 66px 0;
  }

  .page-about .ab-cols {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .rule summary {
    grid-template-columns: auto 200px 1fr;
    grid-template-areas: "num title flag";
    gap: 14px;
    align-items: center;
  }

  .page-about .qc-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.3fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .eco-grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 34px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-about .ab-hero {
    padding: 56px 0 74px;
  }

  .page-about .ab-sec {
    padding: 80px 0;
  }

  .page-about .ab-sec h2 {
    margin-bottom: 26px;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 44px;
  }

  .page-about .team-grid__chart {
    grid-template-columns: 200px minmax(0, 1fr);
    align-items: center;
    gap: 26px;
  }

  .page-about .ab-donut {
    max-width: 200px;
  }

  .page-about .ab-figure img {
    max-height: 460px;
  }

  .page-about .ab-figure--portrait img {
    max-height: 560px;
  }

  .page-about .cta-box {
    padding: 40px 38px;
  }

  .page-about .fit-item {
    padding: 22px 24px 22px 20px;
    gap: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-chip,
  .page-about .cta-actions .btn {
    transition: none;
  }
}
<<<END>>>