.page-about {
  --about-radius-sm: 12px;
  --about-line: rgba(42, 74, 61, 0.9);
  background: var(--pitch-900);
  color: var(--mist);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .about-section {
  padding-block: clamp(52px, 8vw, 104px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(28px, 5vw, 56px) clamp(56px, 8vw, 96px);
  background:
    radial-gradient(120% 90% at 82% 0%, rgba(59, 242, 196, 0.12), transparent 62%),
    radial-gradient(90% 70% at 4% 100%, rgba(156, 140, 255, 0.08), transparent 60%),
    var(--pitch-950);
  border-bottom: 1px solid var(--line-green);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.page-about .about-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 20px 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal-soft);
}

.page-about .about-eyebrow-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--signal-teal);
  box-shadow: 0 0 0 4px rgba(59, 242, 196, 0.14);
  animation: about-breathe 3.4s var(--ease) infinite;
}

@keyframes about-breathe {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.82); }
}

.page-about .about-h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 5.6vw, 62px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-lede {
  max-width: 44em;
  margin: 0 0 30px;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.82;
  color: var(--mist);
}

.page-about .about-hero-figure {
  margin: 0;
}

.page-about .about-hero-figure img,
.page-about .about-flow-figure img,
.page-about .about-standard-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  object-fit: cover;
  border: 1px solid var(--pitch-700);
  background: var(--pitch-800);
}

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

.page-about .about-figure-caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
  opacity: 0.78;
}

.page-about .about-stage {
  padding: 22px 20px;
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(14, 42, 33, 0.96), rgba(5, 19, 15, 0.92));
}

.page-about .about-stage-kicker {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--signal-teal);
}

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

.page-about .about-figure-item {
  display: grid;
  gap: 2px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(42, 74, 61, 0.7);
}

.page-about .about-figure-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-figure-value {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(34px, 5vw, 46px);
  line-height: 1;
  color: var(--signal-teal);
  letter-spacing: 0.01em;
}

.page-about .about-figure-unit {
  font-family: var(--font-label, var(--font-body));
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--teal-soft);
}

.page-about .about-figure-label {
  margin-top: 4px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-stage-note {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px dashed rgba(42, 74, 61, 0.9);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
  opacity: 0.85;
}

/* ---------- 起源 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-about .about-quote {
  border-left: 3px solid var(--signal-teal);
  background: linear-gradient(150deg, rgba(22, 59, 46, 0.75), rgba(8, 28, 22, 0.9));
}

.page-about .about-quote-text {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.4vw, 24px);
  line-height: 1.55;
  color: var(--paper);
}

.page-about .about-h2 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-split-body p {
  margin: 0 0 18px;
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-leaddrop::first-letter {
  float: left;
  margin: 6px 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 3.1em;
  line-height: 0.86;
  color: var(--signal-teal);
}

/* ---------- 年表 ---------- */
.page-about .about-section--timeline {
  background:
    linear-gradient(180deg, rgba(5, 19, 15, 0.9), rgba(8, 28, 22, 0.4)),
    var(--pitch-950);
  border-block: 1px solid var(--line-green);
}

.page-about .about-head {
  max-width: 760px;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-about .about-head .about-eyebrow {
  margin-top: 0;
}

.page-about .about-head-lede {
  margin: 0;
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.82;
  color: var(--mist);
}

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

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--signal-teal), rgba(42, 74, 61, 0.9));
}

.page-about .tl-node {
  position: relative;
  padding-left: 34px;
  padding-bottom: 30px;
  outline: none;
}

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

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--pitch-950);
  border: 2px solid var(--signal-teal);
  box-shadow: 0 0 0 4px rgba(59, 242, 196, 0.08);
  transition: transform 220ms var(--ease), box-shadow 220ms var(--ease);
}

.page-about .tl-node:hover::before,
.page-about .tl-node:focus-visible::before {
  transform: scale(1.18);
  box-shadow: 0 0 0 7px rgba(59, 242, 196, 0.14);
}

.page-about .tl-node--now::before {
  border-color: var(--warm-orange);
  box-shadow: 0 0 0 4px rgba(255, 138, 61, 0.14);
}

.page-about .tl-year {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--signal-teal);
}

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

.page-about .tl-title {
  margin: 0 0 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: clamp(16px, 1.9vw, 19px);
  line-height: 1.5;
  color: var(--paper);
  transition: color 200ms var(--ease);
}

.page-about .tl-node:hover .tl-title,
.page-about .tl-node:focus-visible .tl-title {
  color: var(--signal-teal);
}

.page-about .tl-text,
.page-about .tl-more {
  margin: 0 0 8px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .tl-more {
  margin-bottom: 0;
  font-size: 13.5px;
  color: rgba(195, 210, 203, 0.78);
}

.page-about .tl-node:focus-visible {
  border-radius: var(--about-radius-sm);
  box-shadow: inset 0 0 0 1px var(--signal-teal);
}

/* ---------- 编辑台流程 ---------- */
.page-about .about-flow-head {
  display: grid;
  gap: clamp(22px, 3vw, 36px);
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-about .about-flow-figure {
  margin: 0;
}

.page-about .about-flow-figure img {
  aspect-ratio: 7 / 4;
}

.page-about .about-signal {
  display: block;
  width: 100%;
  height: 44px;
  margin-bottom: 18px;
  opacity: 0.9;
}

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

.page-about .flow-step {
  border: 1px solid var(--pitch-700);
  border-radius: var(--about-radius-sm);
  background: linear-gradient(165deg, rgba(14, 42, 33, 0.95), rgba(8, 28, 22, 0.95));
  padding: 14px 14px 4px;
  transition: transform 220ms var(--ease), border-color 220ms var(--ease);
}

.page-about .flow-step:hover {
  transform: translateY(-4px);
  border-color: var(--signal-teal);
}

.page-about .flow-step summary {
  display: flex;
  align-items: baseline;
  gap: 10px;
  cursor: pointer;
  list-style: none;
  padding-bottom: 10px;
  outline: none;
}

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

.page-about .flow-step summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--teal-soft);
}

.page-about .flow-step[open] summary::after {
  content: "−";
  color: var(--signal-teal);
}

.page-about .flow-step summary:focus-visible {
  box-shadow: 0 0 0 2px var(--signal-teal);
  border-radius: 6px;
}

.page-about .flow-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--signal-teal);
}

.page-about .flow-name {
  font-weight: 600;
  font-size: 15.5px;
  color: var(--paper);
}

.page-about .flow-text {
  margin: 0 0 12px;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 18px;
}

.page-about .about-team-card {
  border-top: 2px solid var(--line-green);
  background: linear-gradient(170deg, rgba(14, 42, 33, 0.9), rgba(8, 28, 22, 0.92));
  transition: transform 220ms var(--ease), border-color 220ms var(--ease);
}

.page-about .about-team-card:hover {
  transform: translateY(-4px);
  border-top-color: var(--signal-teal);
}

.page-about .about-team-card .plaque-title {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: clamp(17px, 2vw, 19px);
  line-height: 1.5;
  color: var(--paper);
}

.page-about .about-team-card .plaque-text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-team-card .plaque-list li {
  font-size: 13px;
  line-height: 1.75;
  color: var(--teal-soft);
}

/* ---------- 覆盖与合作 ---------- */
.page-about .about-section--eco {
  background: linear-gradient(180deg, rgba(5, 19, 15, 0.96), rgba(8, 28, 22, 0.55));
  border-block: 1px solid var(--line-green);
}

.page-about .about-eco-grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-eco-text {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--mist);
}

.page-about .about-eco-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--line-green);
}

.page-about .about-eco-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .about-eco-num {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 34px;
  line-height: 1;
  color: var(--signal-teal);
}

.page-about .about-eco-unit {
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .about-eco-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: flex-start;
}

.page-about .eco-tag {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1 1 46%;
  min-width: 0;
  padding: 14px 14px 12px;
  border-radius: var(--about-radius-sm);
  border: 1px solid var(--pitch-700);
  background: rgba(14, 42, 33, 0.7);
  transition: transform 200ms var(--ease), border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-about .eco-tag:hover,
.page-about .eco-tag:focus-within {
  transform: translateY(-3px);
  background: rgba(22, 59, 46, 0.92);
}

.page-about .eco-tag--media:hover {
  border-color: var(--signal-teal);
}

.page-about .eco-tag--venue:hover {
  border-color: var(--teal-soft);
}

.page-about .eco-tag--data {
  border-color: rgba(255, 138, 61, 0.55);
  background: rgba(201, 86, 28, 0.12);
}

.page-about .eco-tag--data:hover {
  border-color: var(--warm-orange);
  background: rgba(201, 86, 28, 0.2);
}

.page-about .eco-tag-type {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--teal-soft);
}

.page-about .eco-tag--data .eco-tag-type {
  color: var(--warm-orange);
}

.page-about .eco-tag-name {
  font-size: 14px;
  line-height: 1.55;
  color: var(--paper);
}

.page-about .eco-tag-count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
}

/* ---------- 服务标准 ---------- */
.page-about .about-standards {
  display: grid;
  gap: 0;
  margin-bottom: clamp(26px, 4vw, 40px);
  border-top: 1px solid var(--line-green);
}

.page-about .about-standard-row {
  display: grid;
  gap: 6px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-green);
  transition: background 200ms var(--ease);
}

.page-about .about-standard-row:hover {
  background: rgba(22, 59, 46, 0.4);
}

.page-about .about-standard-key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--signal-teal);
}

.page-about .about-standard-val {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--mist);
}

.page-about .about-standard-figure {
  margin: 0 0 clamp(30px, 4vw, 44px);
}

.page-about .about-standard-figure img {
  aspect-ratio: 12 / 7;
}

.page-about .about-cta {
  display: grid;
  gap: 20px;
  padding: clamp(22px, 3.5vw, 34px);
  border-radius: var(--radius);
  border: 1px solid var(--pitch-700);
  background:
    radial-gradient(90% 120% at 92% 0%, rgba(255, 138, 61, 0.16), transparent 60%),
    linear-gradient(160deg, rgba(14, 42, 33, 0.96), rgba(5, 19, 15, 0.96));
}

.page-about .about-cta-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 27px);
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-cta-desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-figures {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 20px;
  }

  .page-about .about-figure-item:nth-last-child(2) {
    border-bottom: 0;
    padding-bottom: 0;
  }

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

  .page-about .eco-tag {
    flex: 1 1 30%;
  }
}

@media (min-width: 820px) {
  .page-about .about-timeline::before {
    left: 108px;
  }

  .page-about .tl-node {
    display: grid;
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 34px;
    padding-left: 0;
    padding-bottom: 34px;
  }

  .page-about .tl-node::before {
    left: 102px;
    top: 12px;
  }

  .page-about .tl-year {
    margin-bottom: 0;
    justify-self: end;
    padding-right: 0;
  }

  .page-about .about-standard-row {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
  }

  .page-about .about-standard-key {
    padding-top: 3px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(280px, 0.58fr);
    align-items: start;
  }

  .page-about .about-hero-aside {
    padding-top: 56px;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 0.42fr) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
  }

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

  .page-about .about-flow-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-about .about-flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-eco-grid {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    gap: clamp(32px, 4vw, 56px);
  }

  .page-about .about-eco-wall {
    align-content: center;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 28px;
  }

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

@media (min-width: 1180px) {
  .page-about .about-figures {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-eyebrow-dot {
    animation: none;
  }

  .page-about .flow-step,
  .page-about .eco-tag,
  .page-about .about-team-card,
  .page-about .tl-node::before {
    transition: none;
  }

  .page-about .flow-step:hover,
  .page-about .eco-tag:hover,
  .page-about .about-team-card:hover {
    transform: none;
  }
}
<<<END>>>

.page-about {
  --font-label: inherit;
}