.page-about {
  background: var(--paper);
  color: var(--text);
  overflow-x: hidden;
}

/* 面包屑条 */
.page-about .about-crumb-bar {
  background: var(--paper);
  border-bottom: 1px solid var(--line-light);
  padding-block: 12px;
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  background: var(--ink);
  color: var(--on-ink);
  padding-block: clamp(40px, 7vw, 96px);
  border-bottom: 1px solid var(--line-dark);
}
.page-about .about-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 60px);
  align-items: center;
}
@media (min-width: 900px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
  }
}
.page-about .about-eyebrow {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--lime);
}
.page-about .about-h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 6.2vw, 58px);
  line-height: 1.07;
  letter-spacing: -0.025em;
  color: var(--on-ink);
  max-width: 18ch;
}
.page-about .about-lede {
  margin: 0 0 clamp(24px, 4vw, 34px);
  font-size: clamp(15px, 2vw, 18px);
  line-height: 1.82;
  color: var(--on-ink-dim);
  max-width: 50ch;
}
.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 0;
  margin: 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--line-dark);
  font-family: var(--font-mono);
}
.page-about .about-hero-meta li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-right: 16px;
  margin-right: 16px;
  border-right: 1px solid var(--line-dark);
}
.page-about .about-hero-meta li:last-child {
  padding-right: 0;
  margin-right: 0;
  border-right: 0;
}
.page-about .meta-k {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--on-ink-dim);
}
.page-about .meta-v {
  font-size: 15px;
  color: var(--on-ink);
}

/* 首屏控制台面板 */
.page-about .about-hero-panel {
  position: relative;
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid var(--line-dark);
  background: linear-gradient(155deg, rgba(46, 59, 122, 0.55), rgba(10, 14, 32, 0.92));
  overflow: hidden;
}
.page-about .about-hero-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line-dark-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-dark-soft) 1px, transparent 1px);
  background-size: 26px 26px;
  pointer-events: none;
}
.page-about .panel-kicker {
  position: relative;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--mist);
}
.page-about .panel-version {
  position: relative;
  margin: 6px 0 4px;
  font-family: var(--font-mono);
  font-size: clamp(46px, 9vw, 72px);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--action);
}
.page-about .panel-list {
  position: relative;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .panel-list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--line-dark);
  font-size: 14px;
  color: var(--on-ink);
}
.page-about .panel-list li span {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--lime);
}

/* 章节骨架 */
.page-about .about-chapter {
  padding-block: clamp(44px, 7vw, 92px);
}
.page-about .about-chapter--paper { background: var(--paper); }
.page-about .about-chapter--cream { background: var(--cream); }
.page-about .about-chapter--ink {
  background: var(--ink);
  color: var(--on-ink);
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}
.page-about .about-chapter-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 3vw, 26px);
}
@media (min-width: 880px) {
  .page-about .about-chapter-grid {
    grid-template-columns: clamp(96px, 11vw, 156px) minmax(0, 1fr);
    gap: clamp(28px, 5vw, 68px);
    align-items: start;
  }
}
.page-about .about-rail {
  display: flex;
  align-items: baseline;
  gap: 14px;
}
@media (min-width: 880px) {
  .page-about .about-rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
    position: sticky;
    top: 96px;
  }
}
.page-about .about-num {
  font-family: var(--font-mono);
  font-size: clamp(38px, 6.4vw, 76px);
  line-height: 0.86;
  letter-spacing: -0.05em;
  color: var(--action);
}
.page-about .about-vert {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.24em;
  color: var(--ink-soft);
}
@media (min-width: 880px) {
  .page-about .about-vert {
    writing-mode: vertical-rl;
    text-orientation: mixed;
  }
}
.page-about .about-chapter--ink .about-vert {
  color: var(--on-ink-dim);
}

.page-about .about-body { min-width: 0; }
.page-about .about-title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.6vw, 38px);
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--text);
  max-width: 22ch;
}
.page-about .about-chapter--ink .about-title { color: var(--on-ink); }

.page-about .about-prose {
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.85;
  color: var(--ink-soft);
}
.page-about .about-prose p {
  margin: 0 0 1.05em;
}
.page-about .about-prose p:last-child { margin-bottom: 0; }
.page-about .about-prose--tight { margin-bottom: clamp(20px, 3vw, 30px); }
.page-about .about-chapter--ink .about-prose { color: var(--on-ink-dim); }

.page-about .about-lead-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
}
@media (min-width: 940px) {
  .page-about .about-lead-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }
}

/* 图片 */
.page-about .about-figure {
  margin: 0;
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line-light);
  object-fit: cover;
}
.page-about .about-figure--wide { margin-top: clamp(24px, 4vw, 40px); }
.page-about .about-figure .media-caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ink-soft);
}
.page-about .about-inline-link {
  color: var(--alert);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-about .about-inline-link:hover { color: var(--action); }

/* 三层判断：分段切换 */
.page-about .about-tabs {
  position: relative;
  margin-top: clamp(20px, 3vw, 32px);
}
.page-about .tab-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}
.page-about .tab-labels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}
@media (min-width: 700px) {
  .page-about .tab-labels { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
.page-about .tab-label {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 15px 18px;
  background: var(--ink);
  color: var(--on-ink-dim);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.005em;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease;
}
.page-about .tab-label span {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
}
.page-about .tab-label:hover {
  background: var(--layer);
  color: var(--on-ink);
}
.page-about #judge-1:checked ~ .tab-labels .tab-label[for="judge-1"],
.page-about #judge-2:checked ~ .tab-labels .tab-label[for="judge-2"],
.page-about #judge-3:checked ~ .tab-labels .tab-label[for="judge-3"] {
  background: var(--layer-hi);
  color: #ffffff;
  box-shadow: inset 0 3px 0 var(--action);
}
.page-about #judge-1:checked ~ .tab-labels .tab-label[for="judge-1"] span,
.page-about #judge-2:checked ~ .tab-labels .tab-label[for="judge-2"] span,
.page-about #judge-3:checked ~ .tab-labels .tab-label[for="judge-3"] span {
  color: var(--lime);
}
.page-about #judge-1:focus-visible ~ .tab-labels .tab-label[for="judge-1"],
.page-about #judge-2:focus-visible ~ .tab-labels .tab-label[for="judge-2"],
.page-about #judge-3:focus-visible ~ .tab-labels .tab-label[for="judge-3"] {
  outline: 2px solid var(--lime);
  outline-offset: -3px;
}

.page-about .tab-panel {
  display: none;
  padding: clamp(20px, 3.4vw, 32px);
  background: var(--layer);
  border: 1px solid var(--line-dark);
  border-top: 0;
}
.page-about #judge-1:checked ~ .tab-panels .tab-panel:nth-child(1),
.page-about #judge-2:checked ~ .tab-panels .tab-panel:nth-child(2),
.page-about #judge-3:checked ~ .tab-panels .tab-panel:nth-child(3) {
  display: block;
}
.page-about .tab-text {
  margin: 0 0 18px;
  max-width: 60ch;
  font-size: clamp(14.5px, 1.6vw, 16px);
  line-height: 1.85;
  color: var(--on-ink);
}
.page-about .tab-action {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-dark);
  font-size: 14px;
  color: var(--on-ink-dim);
}
.page-about .judge-flag {
  display: inline-block;
  padding: 4px 9px;
  background: var(--lime);
  color: var(--lime-ink);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

/* 反馈闭环 */
.page-about .about-loop {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
}
@media (min-width: 900px) {
  .page-about .about-loop {
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    align-items: center;
    gap: clamp(32px, 5vw, 56px);
  }
}
.page-about .about-loop-figure {
  width: 100%;
  max-width: 300px;
  margin-inline: auto;
}
.page-about .about-loop-figure svg {
  display: block;
  width: 100%;
  height: auto;
}
.page-about .loop-ring {
  fill: none;
  stroke: var(--mist);
  stroke-width: 1.5;
  stroke-dasharray: 4 7;
}
.page-about .loop-ring--inner {
  stroke: var(--line-light);
  stroke-dasharray: none;
}
.page-about .loop-core {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.14em;
  fill: var(--text);
}
.page-about .loop-core--sub {
  font-size: 11px;
  letter-spacing: 0.22em;
  fill: var(--ink-soft);
}
.page-about .loop-node circle {
  fill: var(--ink);
  transition: fill 0.2s ease;
}
.page-about .loop-node text {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  fill: var(--lime);
  transition: fill 0.2s ease;
}
.page-about .loop-node:hover circle,
.page-about .loop-node:focus-within circle {
  fill: var(--action);
}
.page-about .loop-node:hover text,
.page-about .loop-node:focus-within text {
  fill: var(--ink);
}

.page-about .about-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-light);
}
.page-about .about-steps li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-light);
}
.page-about .step-num {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--alert);
}
.page-about .step-title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.005em;
  color: var(--text);
}
.page-about .step-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}

/* 运营节拍 */
.page-about .beat-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(20px, 3vw, 30px) 0 clamp(6px, 2vw, 12px);
  padding: 0;
  list-style: none;
  background: var(--line-light);
  border: 1px solid var(--line-light);
}
@media (min-width: 730px) {
  .page-about .beat-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
.page-about .beat-list li {
  padding: 20px clamp(16px, 2.4vw, 24px);
  background: var(--paper);
}
.page-about .beat-k {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--alert);
}
.page-about .beat-v {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}

/* 服务说明牌 */
.page-about .about-plates {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}
@media (min-width: 760px) {
  .page-about .about-plates { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
.page-about .about-plate {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 3vw, 30px);
  background: var(--ink);
  transition: background 0.2s ease;
}
.page-about .about-plate:hover { background: var(--layer); }
.page-about .plate-index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--action);
}
.page-about .plate-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16px, 2vw, 18px);
  letter-spacing: -0.008em;
  color: var(--on-ink);
}
.page-about .plate-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--on-ink-dim);
}

/* 结尾行动区 */
.page-about .about-cta {
  margin-top: clamp(28px, 4vw, 42px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--line-dark);
}
.page-about .about-cta-text {
  margin: 0 0 18px;
  max-width: 48ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--on-ink-dim);
}
.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .about-cta-actions .btn { text-decoration: none; }

@media (prefers-reduced-motion: reduce) {
  .page-about .tab-label,
  .page-about .about-plate,
  .page-about .loop-node circle,
  .page-about .loop-node text {
    transition: none;
  }
}
</｜｜DSML｜｜ parameter>
</result>