.page-about {
  --about-gap: 64px;
  --about-hero-pad: 36px;
  --about-quiet: rgba(110, 127, 115, 0.55);
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: var(--about-hero-pad) 0 40px;
}

.page-about .hero-slab {
  position: absolute;
  top: -28px;
  right: -18%;
  width: min(78%, 520px);
  height: 320px;
  background:
    linear-gradient(128deg, rgba(201, 162, 39, 0.26) 0%, rgba(201, 162, 39, 0.08) 42%, rgba(255, 45, 120, 0.14) 74%, transparent 92%);
  border-radius: var(--radius-lg);
  clip-path: polygon(0 0, 100% 0, 100% 58%, 0 100%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero > *:not(.hero-slab) {
  position: relative;
  z-index: 1;
}

.page-about .about-hero h1 {
  margin: 12px 0 0;
  font-family: var(--serif);
  font-weight: 900;
  font-size: var(--fs-xxl);
  line-height: 1.18;
  color: var(--gold-light);
  letter-spacing: 0.01em;
}

.page-about .about-hero-lead {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: var(--fs-body);
  line-height: 1.85;
  color: var(--stone);
}

.page-about .hero-facts {
  list-style: none;
  margin: 32px 0 0;
  padding: 24px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 18px;
}

.page-about .hero-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .hero-fact-num {
  font-family: var(--mono);
  font-weight: 700;
  font-size: var(--fs-lg);
  color: var(--gold);
  line-height: 1;
}

.page-about .hero-fact-label {
  font-size: var(--fs-sm);
  color: var(--muted);
  line-height: 1.6;
}

.page-about .hero-band {
  margin-top: 32px;
  padding-bottom: 8px;
  display: flex;
  flex-wrap: nowrap;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--gold) transparent;
}

.page-about .hero-band .band-item {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: rgba(27, 44, 36, 0.7);
  color: var(--paper);
  font-size: var(--fs-sm);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .hero-band .band-item .mono {
  color: var(--gold);
  font-weight: 700;
}

.page-about .hero-band .band-item:hover,
.page-about .hero-band .band-item:focus-visible {
  border-color: var(--cyan);
  background: rgba(61, 220, 255, 0.12);
  color: #fff;
  outline: none;
}

.page-about .layout {
  margin-top: 48px;
}

.page-about .rail-sticky > * + * {
  margin-top: 18px;
}

.page-about .rail-index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .rail-index-link {
  display: block;
  padding: 9px 12px;
  border-left: 1px solid var(--line);
  color: var(--stone);
  font-size: var(--fs-sm);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .rail-index-link:hover,
.page-about .rail-index-link:focus-visible {
  border-left-color: var(--cyan);
  background: var(--wash);
  color: var(--gold-light);
  outline: none;
}

.page-about .rail-update {
  padding: 14px 0 0;
  border-top: 1px solid var(--line);
}

.page-about .rail-update .stamp-value {
  margin: 4px 0 0;
  font-family: var(--mono);
  font-weight: 700;
  font-size: var(--fs-sm);
  color: var(--gold-light);
}

.page-about .rail-update .stamp-batch {
  margin: 4px 0 0;
  font-family: var(--mono);
  font-size: var(--fs-xs);
  color: var(--muted);
}

.page-about .section + .section {
  margin-top: var(--about-gap);
  padding-top: var(--about-gap);
  border-top: 1px solid var(--line);
}

/* ---------- 时间轴 ---------- */
.page-about .tl-figure {
  margin: 28px 0 0;
}

.page-about .tl {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  position: relative;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 10px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--line-strong), rgba(201, 162, 39, 0.08));
}

.page-about .tl-node {
  position: relative;
  padding-left: 30px;
  padding-bottom: 48px;
  outline: none;
}

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink-0);
  border: 1px solid var(--line-strong);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .tl-node:nth-child(1) { padding-bottom: 56px; }
.page-about .tl-node:nth-child(2) { padding-bottom: 40px; }
.page-about .tl-node:last-child { padding-bottom: 0; }

.page-about .tl-node:hover::before,
.page-about .tl-node:focus::before,
.page-about .tl-node:focus-within::before {
  background: var(--gold-light);
  border-color: var(--gold-light);
}

.page-about .tl-year {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-weight: 700;
  font-size: var(--fs-lg);
  line-height: 1;
  color: var(--gold);
  letter-spacing: 0.04em;
}

.page-about .tl-title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 900;
  font-size: var(--fs-md);
  line-height: 1.4;
  color: var(--paper);
}

.page-about .tl-text {
  margin: 12px 0 0;
  max-width: 54ch;
  font-size: var(--fs-body);
  line-height: 1.85;
  color: var(--stone);
}

.page-about .tl-more {
  margin: 0;
  padding-top: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--muted);
  border-left: 2px solid transparent;
  transition: max-height var(--dur) var(--ease), opacity var(--dur) var(--ease), padding-top var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .tl-node:hover .tl-more,
.page-about .tl-node:focus .tl-more,
.page-about .tl-node:focus-within .tl-more {
  max-height: 180px;
  opacity: 1;
  padding-top: 10px;
  padding-left: 12px;
  border-left-color: var(--gold);
}

/* ---------- 流程 ---------- */
.page-about .flow-grid {
  display: grid;
  gap: 32px;
}

.page-about .flow-steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .flow-step {
  flex: 1 1 100%;
  padding: 18px 22px 20px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: 22px;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .flow-step:hover {
  border-color: var(--line-strong);
  background: rgba(201, 162, 39, 0.06);
}

.page-about .step-idx {
  display: inline-block;
  font-family: var(--mono);
  font-weight: 700;
  font-size: var(--fs-xs);
  color: var(--clay);
  letter-spacing: 0.1em;
}

.page-about .step-title {
  margin: 6px 0 0;
  font-family: var(--serif);
  font-weight: 900;
  font-size: var(--fs-md);
  color: var(--gold-light);
}

.page-about .step-text {
  margin: 8px 0 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--stone);
}

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

/* ---------- 团队 ---------- */
.page-about .team-bars {
  margin-top: 28px;
  display: grid;
  gap: 22px;
}

.page-about .team-bar {
  padding: 18px 20px;
  background: var(--ink-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--dur) var(--ease);
}

.page-about .team-bar:hover,
.page-about .team-bar:focus,
.page-about .team-bar:focus-within {
  border-color: var(--line-strong);
}

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

.page-about .bar-name {
  font-family: var(--serif);
  font-weight: 900;
  font-size: var(--fs-md);
  color: var(--paper);
}

.page-about .bar-num {
  font-family: var(--mono);
  font-weight: 700;
  font-size: var(--fs-sm);
  color: var(--gold);
  white-space: nowrap;
}

.page-about .bar-track {
  margin-top: 14px;
  height: 12px;
  border-radius: var(--pill);
  background: rgba(201, 162, 39, 0.12);
  overflow: hidden;
}

.page-about .bar-fill {
  display: block;
  height: 100%;
  border-radius: var(--pill);
  transition: filter var(--dur) var(--ease);
}

.page-about .bar-editor .bar-fill {
  width: 47.8%;
  background: linear-gradient(90deg, #8f7318, var(--gold-light));
}

.page-about .bar-support .bar-fill {
  width: 26.1%;
  background: linear-gradient(90deg, #1f5a63, var(--cyan));
}

.page-about .bar-product .bar-fill {
  width: 26.1%;
  background: linear-gradient(90deg, #6d1f45, var(--magenta));
}

.page-about .bar-more {
  margin: 12px 0 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--muted);
}

.page-about .team-figure {
  margin: 32px 0 0;
}

/* ---------- 商协会 ---------- */
.page-about .guild-grid {
  margin-top: 28px;
  display: grid;
  gap: 16px;
}

.page-about .guild-card {
  padding: 24px 24px 26px;
  background: linear-gradient(160deg, rgba(27, 44, 36, 0.95), rgba(18, 33, 27, 0.95));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  transition: border-color var(--dur) var(--ease);
}

.page-about .guild-card:hover {
  border-color: var(--line-strong);
}

.page-about .guild-num {
  margin: 0;
  font-family: var(--mono);
  font-weight: 700;
  font-size: var(--fs-xl);
  line-height: 1;
  color: var(--gold-light);
  letter-spacing: 0.02em;
}

.page-about .guild-title {
  margin: 14px 0 0;
  font-family: var(--serif);
  font-weight: 900;
  font-size: var(--fs-md);
  color: var(--paper);
}

.page-about .guild-text {
  margin: 10px 0 0;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--stone);
}

/* ---------- 资质 ---------- */
.page-about .qual-list {
  margin-top: 28px;
  display: grid;
  gap: 14px;
}

.page-about .qual-item {
  background: var(--ink-2);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  padding: 0 22px;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .qual-item:hover,
.page-about .qual-item[open] {
  border-color: var(--cyan);
  background: rgba(61, 220, 255, 0.06);
}

.page-about .qual-item summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  outline: none;
}

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

.page-about .qual-badge {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-weight: 700;
  font-size: var(--fs-xs);
  color: var(--gold);
  letter-spacing: 0.08em;
}

.page-about .qual-name {
  flex: 1 1 auto;
  font-family: var(--serif);
  font-weight: 900;
  font-size: var(--fs-md);
  color: var(--paper);
}

.page-about .qual-hint {
  flex: 0 0 auto;
  font-size: var(--fs-xs);
  color: var(--muted);
  transition: color var(--dur) var(--ease);
}

.page-about .qual-item:hover .qual-hint,
.page-about .qual-item[open] .qual-hint {
  color: var(--cyan);
}

.page-about .qual-body {
  padding: 0 0 20px;
  border-top: 1px solid var(--line);
}

.page-about .qual-body p {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--stone);
}

/* ---------- 下一步 ---------- */
.page-about .next-grid {
  margin-top: 28px;
  display: grid;
  gap: 16px;
}

.page-about .next-card {
  padding: 22px 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  border-top: 3px solid var(--clay);
  background: rgba(18, 33, 27, 0.65);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .next-card:hover {
  border-color: var(--line-strong);
  border-top-color: var(--magenta);
}

.page-about .next-title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 900;
  font-size: var(--fs-md);
  color: var(--gold-light);
}

.page-about .next-text {
  margin: 12px 0 0;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--stone);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: 34px 26px 36px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(255, 45, 120, 0.16) 0%, transparent 58%),
    linear-gradient(150deg, var(--ink-1) 0%, var(--ink-2) 100%);
}

.page-about .cta-title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 900;
  font-size: var(--fs-lg);
  color: var(--gold-light);
}

.page-about .cta-text {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: var(--fs-body);
  line-height: 1.85;
  color: var(--stone);
}

.page-about .cta-links {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .cta-links .btn {
  text-decoration: none;
}

/* ---------- 平板以上 ---------- */
@media (min-width: 720px) {
  .page-about {
    --about-gap: 80px;
    --about-hero-pad: 52px;
  }

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

  .page-about .tl {
    margin-top: 44px;
  }

  .page-about .tl::before {
    left: 5px;
  }

  .page-about .tl-node {
    padding-left: 44px;
    padding-bottom: 56px;
  }

  .page-about .tl-node::before {
    width: 9px;
    height: 9px;
    top: 10px;
  }

  .page-about .tl-node:nth-child(1) { padding-bottom: 72px; }
  .page-about .tl-node:nth-child(2) { padding-bottom: 52px; }
  .page-about .tl-node:nth-child(3) { padding-bottom: 0; }

  .page-about .flow-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: 40px;
  }

  .page-about .flow-steps {
    flex-wrap: wrap;
  }

  .page-about .flow-step {
    flex: 1 1 calc(50% - 4px);
  }

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

  .page-about .next-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .next-card:first-child {
    grid-row: span 2;
  }

  .page-about .about-cta {
    padding: 44px 40px 46px;
  }
}

@media (min-width: 1080px) {
  .page-about {
    --about-gap: 96px;
  }

  .page-about .tl-text {
    font-size: var(--fs-body);
  }

  .page-about .flow-step {
    flex: 1 1 calc(50% - 4px);
  }
}

@media (hover: none) {
  .page-about .tl-more {
    max-height: none;
    opacity: 1;
    padding-top: 10px;
    padding-left: 12px;
    border-left-color: var(--line);
  }

  .page-about .bar-more {
    color: var(--stone);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-more,
  .page-about .bar-fill,
  .page-about .qual-item,
  .page-about .next-card,
  .page-about .hero-band .band-item,
  .page-about .rail-index-link {
    transition: none;
  }
}
<<<END>>>