/* OPC就业图鉴 — 封面 / 各互动装置 / 结尾 */

/* ========== 00 封面 ========== */
.cover {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 80px 24px 60px;
  position: relative;
  overflow: hidden;
}

.cover::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 55% 45% at 12% 18%, rgba(214, 154, 58, 0.09), transparent 60%);
  pointer-events: none;
}

.cover-inner {
  width: 1080px;
  max-width: 92vw;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.cover-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--accent-gold);
  margin-bottom: 48px;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 700ms var(--ease-archive), transform 700ms var(--ease-archive);
}

.cover-meta span {
  display: block;
  margin-bottom: 6px;
}

.cover-title {
  font-family: var(--font-serif);
  font-size: clamp(36px, 7vw, 64px);
  line-height: 1.25;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 700ms 180ms var(--ease-archive), transform 700ms 180ms var(--ease-archive);
}

.cover-subtitle {
  font-family: var(--font-serif);
  font-size: clamp(16px, 2.2vw, 20px);
  color: var(--text-secondary);
  margin-bottom: 56px;
  letter-spacing: 0.06em;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 700ms 320ms var(--ease-archive), transform 700ms 320ms var(--ease-archive);
}

.cover-judgment {
  font-family: var(--font-serif);
  font-size: clamp(18px, 2.8vw, 24px);
  line-height: 1.7;
  color: var(--accent-gold);
  margin-bottom: 72px;
  max-width: 480px;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 700ms 460ms var(--ease-archive), transform 700ms 460ms var(--ease-archive);
}

.cover-evidence {
  border-top: 1px solid var(--border-line);
  border-bottom: 1px solid var(--border-line);
  padding: 28px 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 700ms 600ms var(--ease-archive), transform 700ms 600ms var(--ease-archive);
}

.cover.is-ready .cover-meta,
.cover.is-ready .cover-title,
.cover.is-ready .cover-subtitle,
.cover.is-ready .cover-judgment,
.cover.is-ready .cover-evidence {
  opacity: 1;
  transform: translateY(0);
}

.cover-evidence .ev-item {
  text-align: left;
  padding: 0 16px;
  border-right: 1px solid var(--border-line);
}

.cover-evidence .ev-item:last-child {
  border-right: none;
}

.cover-evidence .ev-num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 32px);
  color: var(--accent-gold);
  margin-bottom: 8px;
}

.cover-evidence .ev-label {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ========== 02 横向证据条 ========== */
.evidence-bar {
  padding: 120px 0;
}

.evidence-bar .bar-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--border-line);
  border-bottom: 1px solid var(--border-line);
}

.evidence-bar .bar-item {
  padding: 48px 32px;
  border-right: 1px solid var(--border-line);
  position: relative;
}

.evidence-bar .bar-item:last-child {
  border-right: none;
}

.evidence-bar .bar-num {
  font-family: var(--font-mono);
  font-size: clamp(40px, 6vw, 64px);
  color: var(--accent-gold);
  line-height: 1;
  margin-bottom: 16px;
  opacity: 0.35;
  transition: opacity 500ms ease-out, text-shadow 500ms;
}

.evidence-bar .bar-item.is-lit .bar-num {
  opacity: 1;
  text-shadow: 0 0 24px rgba(214, 154, 58, 0.25);
}

.evidence-bar .bar-label {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 16px;
}

.evidence-bar .src-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  border: 1px solid var(--border-line);
  padding: 4px 10px;
  transition: color 300ms, border-color 300ms;
}

.evidence-bar .src-btn:hover,
.evidence-bar .src-btn.is-open {
  color: var(--accent-gold);
  border-color: var(--accent-gold);
}

.evidence-bar .src-panel {
  display: none;
  margin-top: 12px;
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.6;
  padding: 10px 12px;
  border-left: 2px solid var(--accent-gold);
  background: rgba(214, 154, 58, 0.04);
}

.evidence-bar .src-panel.is-open {
  display: block;
}

.evidence-bar .bar-note {
  margin-top: 32px;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 900px;
}

/* ========== 03 时间线 ========== */
.timeline {
  position: relative;
  padding: 40px 0 20px;
}

.timeline-track {
  position: relative;
  display: flex;
  gap: 0;
  overflow-x: auto;
  padding-bottom: 24px;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-gold) transparent;
}

.timeline-track::before {
  content: "";
  position: absolute;
  top: 14px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--border-line);
}

.timeline-node {
  flex: 0 0 220px;
  padding: 0 16px;
  position: relative;
  cursor: pointer;
}

.timeline-node .dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg-module);
  border: 2px solid var(--accent-gold);
  margin-bottom: 20px;
  transition: transform 400ms var(--ease-archive), box-shadow 400ms;
  position: relative;
  z-index: 1;
}

.timeline-node.is-active .dot,
.timeline-node:hover .dot {
  transform: scale(1.35);
  box-shadow: 0 0 0 4px rgba(214, 154, 58, 0.2);
  background: var(--accent-gold);
}

.timeline-node .year {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-gold);
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.timeline-node .event {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--text-primary);
  line-height: 1.55;
  opacity: 0.7;
  transition: opacity 300ms;
}

.timeline-node.is-active .event,
.timeline-node:hover .event {
  opacity: 1;
}

.timeline-detail {
  margin-top: 20px;
  padding: 16px 20px;
  border: 1px solid var(--border-line);
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  min-height: 64px;
}

/* ========== 05 工作拆解装置 ========== */
.work-decomposer {
  text-align: center;
}

.work-decomposer .device-header {
  margin-bottom: 48px;
}

.work-decomposer .device-header h2 {
  font-family: var(--font-serif);
  font-size: 28px;
  margin-bottom: 12px;
}

.work-decomposer .device-header p {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--text-secondary);
}

.wd-stage-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.15em;
  color: var(--accent-gold);
  margin-bottom: 36px;
}

.wd-cloud {
  position: relative;
  min-height: 380px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 14px 20px;
  padding: 48px 40px;
  background: var(--bg-module);
  border: 1px solid var(--border-line);
}

.wd-cloud.is-scattered {
  display: block;
}

.wd-tag {
  font-family: var(--font-sans);
  font-size: 15px;
  padding: 8px 16px;
  border: 1px solid rgba(232, 225, 210, 0.2);
  color: var(--text-primary);
  white-space: nowrap;
  transition:
    transform 700ms var(--ease-archive),
    color 700ms var(--ease-archive),
    border-color 700ms var(--ease-archive),
    opacity 500ms;
  opacity: 0;
  transform: scale(0.9);
}

.wd-cloud.is-scattered .wd-tag {
  position: absolute;
  transform: translate(-50%, -50%) scale(0.9);
}

.wd-cloud.is-shown .wd-tag {
  opacity: 1;
  transform: translate(var(--tx, 0), var(--ty, 0)) scale(1);
}

.wd-cloud.is-scattered.is-shown .wd-tag {
  transform: translate(-50%, -50%) scale(1);
}

.wd-tag.is-teal {
  color: var(--accent-teal);
  border-color: rgba(111, 174, 159, 0.45);
}

.wd-tag.is-gold {
  color: var(--accent-gold);
  border-color: rgba(214, 154, 58, 0.5);
}

.wd-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-top: 32px;
}

.wd-controls button {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  border: 1px solid var(--border-line);
  width: 36px;
  height: 36px;
  transition: color 300ms, border-color 300ms;
}

.wd-controls button:hover {
  color: var(--accent-gold);
  border-color: var(--accent-gold);
}

.wd-dots {
  display: flex;
  gap: 10px;
}

.wd-dots button {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-secondary);
  opacity: 0.4;
  border: none;
  padding: 0;
}

.wd-dots button.is-active {
  opacity: 1;
  background: var(--accent-gold);
}

/* ========== 06 访谈批注 ========== */
.annotation {
  max-width: 480px;
  margin: 0 auto 64px;
  padding: 32px 28px;
  border-top: 1px solid var(--accent-gold);
  border-bottom: 1px solid var(--accent-gold);
}

.annotation.offset-left {
  margin-left: max(24px, calc(50% - 400px));
  margin-right: auto;
}

.annotation.offset-right {
  margin-right: max(24px, calc(50% - 400px));
  margin-left: auto;
}

.annotation .quote {
  font-family: var(--font-serif);
  font-size: clamp(18px, 2.4vw, 22px);
  line-height: 1.75;
  color: var(--text-primary);
  margin-bottom: 20px;
  white-space: pre-line;
}

.annotation .attr {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--accent-gold);
  letter-spacing: 0.04em;
}

.annotation .obs-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--accent-gold);
  margin-bottom: 16px;
}

.annotation-context {
  max-width: 640px;
  margin: -40px auto 80px;
  padding: 0 24px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ========== 08 社交墙 ========== */
.social-wall {
  position: relative;
  min-height: 420px;
  background: var(--bg-module);
  border: 1px solid var(--border-line);
  padding: 48px 32px;
  overflow: hidden;
}

.wall-layer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px 20px;
  transition: opacity 800ms var(--ease-archive);
}

.wall-word {
  font-family: var(--font-sans);
  font-size: clamp(16px, 2.5vw, 22px);
  padding: 6px 4px;
  transition: opacity 800ms, color 800ms;
}

.wall-surface .wall-word {
  color: var(--text-primary);
}

.wall-surface .wall-word.highlight {
  color: var(--accent-gold);
}

.wall-depth {
  position: absolute;
  inset: 48px 32px;
  opacity: 0;
  pointer-events: none;
}

.wall-depth .wall-word {
  color: var(--text-secondary);
}

.wall-depth .wall-word.risk {
  color: var(--accent-rust);
}

.social-wall.is-revealed .wall-surface {
  opacity: 0.25;
}

.social-wall.is-revealed .wall-depth {
  opacity: 1;
  pointer-events: auto;
}

/* ========== 10 收入阶梯楼 ========== */
.income-tower {
  position: relative;
}

.income-tower .tower-warn {
  position: sticky;
  top: 16px;
  z-index: 10;
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--accent-rust);
  border: 1px solid rgba(181, 82, 58, 0.4);
  background: rgba(9, 9, 7, 0.92);
  padding: 10px 16px;
  margin-bottom: 32px;
  letter-spacing: 0.02em;
}

.tower-grid {
  display: grid;
  grid-template-rows: repeat(5, auto);
  gap: 8px;
  background: var(--bg-module);
  border: 1px solid var(--border-line);
  padding: 16px;
  position: relative;
}

.tower-grid::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 120px;
  background: radial-gradient(ellipse at 50% 0%, rgba(214, 154, 58, 0.12), transparent 70%);
  pointer-events: none;
}

.tower-floor {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 16px;
  padding: 20px 16px;
  border: 1px solid var(--border-line);
  background: var(--bg-module-alt);
  transition: border-color 400ms, opacity 500ms;
  opacity: 0.55;
}

.tower-floor.is-lit {
  opacity: 1;
  border-color: rgba(214, 154, 58, 0.5);
}

.tower-floor .floor-id {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent-gold);
  letter-spacing: 0.1em;
}

.tower-floor .floor-name {
  font-family: var(--font-serif);
  font-size: 16px;
  margin-bottom: 4px;
}

.tower-floor .floor-range {
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.tower-windows {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tower-window {
  font-family: var(--font-sans);
  font-size: 12px;
  padding: 8px 12px;
  border: 1px solid var(--border-line);
  color: var(--text-primary);
  background: var(--bg-main);
  cursor: default;
  position: relative;
  transition: border-color 300ms;
}

.tower-window:hover {
  border-color: var(--accent-gold);
}

.tower-window .tooltip {
  display: none;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 0;
  width: 260px;
  padding: 14px;
  background: var(--bg-main);
  border: 1px solid var(--accent-gold);
  z-index: 5;
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-secondary);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

.tower-window .tooltip strong {
  color: var(--text-primary);
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
}

.tower-window:hover .tooltip {
  display: block;
}

.tower-empty {
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--text-secondary);
  opacity: 0.6;
  font-style: italic;
}

/* ========== 12 工作流重组实验 ========== */
.workflow-lab .lab-header {
  text-align: center;
  margin-bottom: 48px;
}

.workflow-lab .lab-header h2 {
  font-size: 28px;
  margin-bottom: 8px;
}

.workflow-lab .lab-header .sub {
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.workflow-lab .lab-header .hint {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-gold);
  letter-spacing: 0.08em;
}

.lab-steps {
  display: grid;
  gap: 28px;
}

.lab-step {
  border: 1px solid var(--border-line);
  padding: 24px;
  background: var(--bg-module);
}

.lab-step h3 {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--accent-gold);
  margin-bottom: 16px;
  font-weight: 400;
}

.lab-options {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.lab-options button {
  font-family: var(--font-sans);
  font-size: 14px;
  padding: 10px 16px;
  border: 1px solid var(--border-line);
  color: var(--text-primary);
  transition: border-color 300ms, color 300ms, background 300ms;
}

.lab-options button:hover {
  border-color: rgba(214, 154, 58, 0.5);
}

.lab-options button.is-selected {
  border-color: var(--accent-gold);
  color: var(--accent-gold);
  background: rgba(214, 154, 58, 0.08);
}

.lab-result {
  margin-top: 40px;
  border: 1px solid var(--accent-gold);
  padding: 32px;
  background: var(--bg-module-alt);
  display: none;
}

.lab-result.is-visible {
  display: block;
}

.lab-result h4 {
  font-family: var(--font-serif);
  font-size: 22px;
  color: var(--accent-gold);
  margin-bottom: 20px;
}

.lab-result dl {
  display: grid;
  gap: 12px;
  margin-bottom: 24px;
}

.lab-result dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
}

.lab-result dd {
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.lab-result .closing {
  font-family: var(--font-serif);
  font-size: 15px;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-line);
  padding-top: 16px;
  line-height: 1.7;
}

/* ========== 13 产品化路径 ========== */
.product-path {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
  margin: 64px auto;
  width: 1080px;
  max-width: 92vw;
  padding: 40px 16px;
  border-top: 1px solid var(--border-line);
  border-bottom: 1px solid var(--border-line);
  position: relative;
  overflow-x: auto;
}

.product-path::before {
  content: "";
  position: absolute;
  top: 56px;
  left: 8%;
  right: 8%;
  height: 1px;
  background: var(--border-line);
}

.path-node {
  flex: 1;
  min-width: 100px;
  text-align: center;
  position: relative;
  z-index: 1;
  cursor: default;
}

.path-node .node-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--border-line);
  background: var(--bg-main);
  margin: 0 auto 16px;
  transition: border-color 400ms, box-shadow 400ms, background 400ms;
}

.path-node.is-lit .node-dot {
  border-color: var(--accent-gold);
  background: var(--accent-gold);
  box-shadow: 0 0 0 4px rgba(214, 154, 58, 0.2);
}

.path-node .node-label {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--text-secondary);
  transition: color 400ms;
}

.path-node.is-lit .node-label {
  color: var(--text-primary);
}

.path-node .node-tip {
  display: none;
  margin-top: 12px;
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.55;
  padding: 8px;
  border: 1px solid var(--border-line);
  background: var(--bg-module);
}

.path-node:hover .node-tip {
  display: block;
}

/* ========== 16 城市接口 ========== */
.city-interfaces {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px 12px;
  margin: 64px auto 0;
  width: 1080px;
  max-width: 92vw;
  padding: 0 12px;
}

.iface-tag {
  font-family: var(--font-sans);
  font-size: 16px;
  padding: 14px 12px;
  border: 1px solid var(--border-line);
  color: var(--text-secondary);
  background: var(--bg-module);
  cursor: default;
  transition: border-color 500ms, color 500ms, box-shadow 500ms;
  position: relative;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.iface-tag.is-lit {
  color: var(--accent-gold);
  border-color: var(--accent-gold);
  box-shadow: 0 0 20px rgba(214, 154, 58, 0.12);
}

.iface-tag .iface-detail {
  display: block;
  position: static;
  transform: none;
  white-space: normal;
  font-size: 12px;
  line-height: 1.55;
  color: var(--text-secondary);
  padding: 0;
  border: none;
  background: transparent;
  opacity: 0.35;
  max-width: 100%;
  transition: opacity 400ms, color 400ms;
}

.iface-tag.is-lit .iface-detail,
.iface-tag:hover .iface-detail {
  opacity: 1;
  color: var(--text-secondary);
}

.iface-tag.is-lit .iface-detail {
  color: rgba(232, 225, 210, 0.72);
}

.iface-list {
  max-width: 640px;
  margin: 72px auto 0;
  padding: 40px 24px 0;
  border-top: 1px solid var(--border-line);
}

.iface-list p.iface-line {
  font-size: 18px;
  margin-bottom: 18px;
  line-height: 1.7;
  opacity: 0.45;
  transition: opacity 500ms, color 500ms;
}

.iface-list p.iface-line.is-lit {
  opacity: 1;
  color: var(--text-primary);
}

/* ========== 18 政策翻面卡 ========== */
.policy-flip {
  perspective: 1200px;
  max-width: 720px;
  margin: 48px auto;
  height: 280px;
}

.flip-card {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 700ms var(--ease-archive);
  cursor: pointer;
}

.flip-card.is-flipped {
  transform: rotateY(180deg);
}

.flip-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border: 1px solid var(--border-line);
  background: var(--bg-module);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 32px;
  gap: 16px;
}

.flip-face.back {
  transform: rotateY(180deg);
  border-color: rgba(214, 154, 58, 0.45);
}

.flip-face .face-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.flip-chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.flip-chips span {
  font-family: var(--font-sans);
  font-size: 15px;
  padding: 8px 14px;
  border: 1px solid var(--border-line);
  color: var(--text-primary);
}

.flip-face.back .flip-chips span {
  color: var(--accent-gold);
  border-color: rgba(214, 154, 58, 0.35);
}

.policy-afterword {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 72px 24px 80px;
  min-height: 200px;
}

.policy-msg {
  text-align: center;
  font-family: var(--font-serif);
  font-size: 20px;
  line-height: 1.7;
  color: var(--accent-gold);
  margin: 0 auto;
  max-width: 480px;
}

.flip-hint {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
  letter-spacing: 0.1em;
  margin: 0 0 28px;
}

/* ========== 20 城市类型 ========== */
.city-types {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  width: 1080px;
  max-width: 92vw;
  margin: 48px auto;
}

.city-type {
  border: 1px solid var(--border-line);
  padding: 24px 20px;
  background: var(--bg-module);
  transition: border-color 300ms;
  cursor: default;
}

.city-type:hover {
  border-color: var(--accent-gold);
}

.city-type h4 {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--accent-gold);
  margin-bottom: 10px;
}

.city-type p {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 400ms, opacity 400ms, margin 400ms;
}

.city-type:hover p {
  max-height: 120px;
  opacity: 1;
  margin-top: 4px;
}

/* ========== 22 结尾路径汇流 ========== */
.ending-converge {
  padding: 100px 24px;
  text-align: center;
  position: relative;
}

.ending-converge::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 50% 40% at 50% 60%, rgba(214, 154, 58, 0.07), transparent 70%);
  pointer-events: none;
}

.converge-svg {
  width: min(640px, 90vw);
  height: 200px;
  margin: 0 auto 48px;
}

.converge-svg path {
  fill: none;
  stroke: var(--accent-gold);
  stroke-width: 1;
  stroke-dasharray: 400;
  stroke-dashoffset: 400;
  transition: stroke-dashoffset 1200ms var(--ease-archive);
}

.ending-converge.is-drawn .converge-svg path {
  stroke-dashoffset: 0;
}

.converge-labels {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px 20px;
  margin-bottom: 64px;
}

.converge-labels span {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
}

.ending-gold {
  font-family: var(--font-serif);
  font-size: clamp(22px, 3.5vw, 32px);
  line-height: 1.7;
  color: var(--accent-gold);
  max-width: 560px;
  margin: 0 auto 80px;
  letter-spacing: 0.03em;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 800ms 400ms var(--ease-archive), transform 800ms 400ms var(--ease-archive);
}

.ending-converge.is-drawn .ending-gold {
  opacity: 1;
  transform: translateY(0);
}

.ending-final {
  font-family: var(--font-serif);
  font-size: clamp(28px, 5vw, 42px);
  color: var(--text-primary);
  margin: 100px auto 48px;
  letter-spacing: 0.06em;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 800ms 700ms var(--ease-archive), transform 800ms 700ms var(--ease-archive);
}

.ending-converge.is-drawn .ending-final {
  opacity: 1;
  transform: translateY(0);
}

.ending-epilogue {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 24px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  text-align: left;
}

/* ========== 23 方法说明 ========== */
.method-section {
  padding: 120px 0 160px;
}

.method-section h2 {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--accent-gold);
  text-align: center;
  margin-bottom: 48px;
}

.method-grid {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  gap: 28px;
}

.method-item {
  border-left: 2px solid var(--border-line);
  padding-left: 20px;
}

.method-item h3 {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--accent-gold);
  margin-bottom: 8px;
  font-weight: 500;
}

.method-item p {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ========== 矩阵图D / 图4 / 图6 简化真实图 ========== */
.matrix-grid {
  display: grid;
  gap: 2px;
  overflow-x: auto;
  padding: 8px 0;
}

.matrix-cell {
  width: 14px;
  height: 14px;
  border: 1px solid rgba(232, 225, 210, 0.08);
  background: transparent;
  cursor: default;
  transition: background 200ms, border-color 200ms;
}

.matrix-cell.has-case {
  background: var(--accent-gold);
  border-color: var(--accent-gold);
}

.matrix-cell.has-case:hover {
  box-shadow: 0 0 0 3px rgba(214, 154, 58, 0.3);
}

.matrix-wrap {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  overflow-x: auto;
}

.matrix-ylabels {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-secondary);
  padding-top: 28px;
}

.matrix-ylabels span {
  height: 14px;
  line-height: 14px;
  white-space: nowrap;
}

.matrix-main {
  flex: 1;
  min-width: 400px;
}

.matrix-xlabels {
  display: flex;
  gap: 2px;
  margin-bottom: 6px;
}

.matrix-xlabels span {
  width: 14px;
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-secondary);
  writing-mode: vertical-rl;
  height: 72px;
  text-align: left;
}

.matrix-tooltip-live {
  margin-top: 12px;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--text-secondary);
  min-height: 40px;
  padding: 8px 12px;
  border-left: 2px solid var(--border-line);
}

.op-bars {
  display: grid;
  gap: 10px;
  padding: 16px 0;
}

.op-bar-row {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 12px;
  align-items: center;
}

.op-bar-row .label {
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--text-secondary);
}

.op-bar-track {
  display: flex;
  height: 18px;
  gap: 2px;
}

.op-bar-seg {
  flex: 1;
  background: rgba(214, 154, 58, 0.15);
  border: 1px solid transparent;
  transition: background 300ms;
}

.op-bar-seg:nth-child(1) { background: rgba(214, 154, 58, 0.55); }
.op-bar-seg:nth-child(2) { background: rgba(92, 107, 87, 0.55); }
.op-bar-seg:nth-child(3) { background: rgba(140, 74, 60, 0.45); }
.op-bar-seg:nth-child(4) { background: rgba(74, 91, 102, 0.5); }
.op-bar-seg:nth-child(5) { background: rgba(140, 135, 118, 0.45); }

.op-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-secondary);
}

.op-legend i {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 4px;
  vertical-align: middle;
}

.raincloud {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  padding: 32px 16px;
  align-items: flex-end;
  min-height: 200px;
}

.raincloud .dot {
  border-radius: 50%;
  background: rgba(214, 154, 58, 0.45);
  border: 1px solid rgba(214, 154, 58, 0.6);
  transition: transform 300ms;
}

.raincloud .dot:hover {
  transform: scale(1.3);
  background: var(--accent-gold);
}

.scheme-note {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent-rust);
  text-align: center;
  margin-top: 12px;
  letter-spacing: 0.04em;
}

/* ========== 移动端 ========== */
@media (max-width: 768px) {
  .cover-evidence {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .cover-evidence .ev-item {
    border-right: none;
    border-bottom: 1px solid var(--border-line);
    padding-bottom: 16px;
  }

  .evidence-bar .bar-grid {
    grid-template-columns: 1fr;
  }

  .evidence-bar .bar-item {
    border-right: none;
    border-bottom: 1px solid var(--border-line);
  }

  .city-types {
    grid-template-columns: 1fr;
  }

  .city-interfaces {
    grid-template-columns: 1fr 1fr;
  }

  .city-interfaces .iface-tag:last-child {
    grid-column: 1 / -1;
  }

  .iface-list {
    margin-top: 40px;
    padding-top: 28px;
  }

  .annotation.offset-left,
  .annotation.offset-right {
    margin-left: auto;
    margin-right: auto;
  }

  .tower-floor {
    grid-template-columns: 1fr;
  }

  .tower-window .tooltip {
    position: fixed;
    left: 16px;
    right: 16px;
    width: auto;
    bottom: 16px;
  }

  .product-path {
    flex-wrap: nowrap;
  }

  .policy-flip {
    height: 320px;
  }
}