.section {
  padding: 56px 64px;
  border-bottom: 1px solid var(--line-soft);
  position: relative;
}

.section:last-child {
  border-bottom: none;
}

.section-header {
  margin-bottom: 36px;
  display: flex;
  align-items: flex-start;
  gap: 20px;
}

.section-number {
  flex-shrink: 0;
  font-family: var(--font-serif);
  font-size: 13px;
  font-weight: 600;
  color: var(--amber-deep);
  letter-spacing: 0.15em;
  padding-top: 6px;
  width: 48px;
  text-align: right;
  border-right: 2px solid var(--amber);
  padding-right: 12px;
  line-height: 1.2;
}

.section-title-group {
  flex: 1;
}

.section-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}

.section-en {
  font-family: var(--font-serif);
  font-size: 12px;
  color: var(--ink-mute);
  font-style: italic;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.section-body p {
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-soft);
  margin-bottom: 1em;
}

.section-body p.lead {
  font-size: 17px;
  color: var(--ink);
  line-height: 1.85;
  font-family: var(--font-serif);
  margin-bottom: 1.5em;
  padding-left: 16px;
  border-left: 3px solid var(--amber);
}

.section-body strong {
  color: var(--teal);
  font-weight: 600;
}

.overview-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  margin-top: 24px;
  align-items: start;
}

.overview-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.stat-card {
  background: var(--paper-warm);
  padding: 20px;
  border-radius: var(--radius);
  border-left: 3px solid var(--teal);
  transition: all 0.25s ease;
}

.stat-card:hover {
  border-left-color: var(--amber);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.stat-card .stat-num {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--teal);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-card .stat-label {
  font-size: 12px;
  color: var(--ink-mute);
  letter-spacing: 0.05em;
}

.stat-card .stat-unit {
  font-size: 14px;
  color: var(--ink-mute);
  margin-left: 4px;
  font-weight: 400;
}

.definition-box {
  background: linear-gradient(135deg, var(--paper-warm) 0%, #fff 100%);
  border: 1px solid var(--line);
  border-left: 4px solid var(--teal);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 24px;
  position: relative;
}

.definition-box::before {
  content: "”";
  position: absolute;
  top: 8px;
  right: 24px;
  font-family: var(--font-serif);
  font-size: 72px;
  color: var(--line);
  line-height: 1;
}

.definition-box .def-label {
  font-family: var(--font-serif);
  font-size: 13px;
  color: var(--amber-deep);
  letter-spacing: 0.1em;
  margin-bottom: 12px;
  font-weight: 600;
}

.definition-box .def-text {
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 1.9;
  color: var(--ink);
  font-weight: 500;
}

.term-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.term-item {
  padding: 16px;
  background: #fff;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  transition: all 0.2s ease;
}

.term-item:hover {
  border-color: var(--amber-soft);
  box-shadow: var(--shadow-sm);
}

.term-item .term-name {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--teal);
  margin-bottom: 6px;
}

.term-item .term-desc {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.timeline {
  position: relative;
  padding-left: 32px;
  margin-top: 24px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--amber) 0%, var(--teal) 100%);
}

.timeline-item {
  position: relative;
  padding-bottom: 32px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 6px;
  width: 14px;
  height: 14px;
  background: var(--paper);
  border: 3px solid var(--amber);
  border-radius: 50%;
  z-index: 1;
  transition: all 0.25s ease;
}

.timeline-item:hover::before {
  background: var(--amber);
  transform: scale(1.15);
}

.timeline-item .year {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--teal);
  margin-bottom: 6px;
  letter-spacing: 0.02em;
}

.timeline-item .event-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.timeline-item .event-desc {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.8;
}

.ability-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.ability-card {
  background: #fff;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
  transition: all 0.3s ease;
  overflow: hidden;
}

.ability-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--teal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.ability-card:hover {
  border-color: var(--teal-soft);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.ability-card:hover::before {
  transform: scaleX(1);
}

.ability-card .ability-icon {
  width: 44px;
  height: 44px;
  background: var(--paper-warm);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--teal);
  font-size: 22px;
  font-family: var(--font-serif);
  font-weight: 700;
  border: 1px solid var(--line);
}

.ability-card .ability-name {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.ability-card .ability-desc {
  font-size: 13.5px;
  color: var(--ink-soft);
  line-height: 1.75;
  margin-bottom: 12px;
}

.ability-card .ability-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.ability-card .ability-tag {
  font-size: 11px;
  padding: 3px 8px;
  background: var(--paper-warm);
  color: var(--ink-mute);
  border-radius: 2px;
  letter-spacing: 0.03em;
}

.work-modules {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.work-module {
  background: #fff;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
  transition: all 0.25s ease;
}

.work-module:hover {
  border-color: var(--amber-soft);
  box-shadow: var(--shadow-sm);
}

.work-module .work-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}

.work-module .work-num {
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  background: var(--teal);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.work-module .work-title {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.work-module ul.work-list {
  list-style: none;
  padding: 0;
}

.work-module ul.work-list li {
  font-size: 13.5px;
  color: var(--ink-soft);
  line-height: 1.8;
  padding-left: 16px;
  position: relative;
  margin-bottom: 4px;
}

.work-module ul.work-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--amber);
}

.level-table-wrap {
  margin-top: 24px;
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.level-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: #fff;
}

.level-table th,
.level-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line-soft);
}

.level-table thead th {
  background: var(--teal);
  color: #fff;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 13.5px;
  letter-spacing: 0.03em;
  border-bottom: none;
}

.level-table thead th:first-child {
  border-top-left-radius: var(--radius);
}

.level-table thead th:last-child {
  border-top-right-radius: var(--radius);
}

.level-table tbody tr:nth-child(even) {
  background: var(--paper);
}

.level-table tbody tr:hover {
  background: var(--paper-warm);
}

.level-table .level-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 2px;
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font-serif);
  letter-spacing: 0.03em;
}

.level-tag.l5 { background: #e8f0e8; color: #5a8c5a; }
.level-tag.l4 { background: #e3edf2; color: #4a8395; }
.level-tag.l3 { background: #f5ead8; color: #b08d3c; }
.level-tag.l2 { background: #f0e0d0; color: #a06a3c; }
.level-tag.l1 { background: #ecd8c8; color: #8a4a2c; }

.level-table .level-num {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--teal);
  font-size: 16px;
}

.knowledge-map {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.knowledge-card {
  background: #fff;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 24px;
  transition: all 0.25s ease;
  position: relative;
}

.knowledge-card:hover {
  border-color: var(--teal-soft);
  box-shadow: var(--shadow-sm);
}

.knowledge-card .know-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.knowledge-card .know-icon {
  width: 36px;
  height: 36px;
  background: var(--paper-warm);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--teal);
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 16px;
  border: 1px solid var(--line);
}

.knowledge-card .know-title {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.knowledge-card .know-points {
  list-style: none;
  padding: 0;
}

.knowledge-card .know-points li {
  font-size: 13.5px;
  color: var(--ink-soft);
  line-height: 1.8;
  padding-left: 14px;
  position: relative;
  margin-bottom: 4px;
}

.knowledge-card .know-points li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--amber);
  font-size: 10px;
  top: 6px;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.tool-card {
  background: var(--paper-warm);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  text-align: center;
  transition: all 0.25s ease;
}

.tool-card:hover {
  background: #fff;
  border-color: var(--teal-soft);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}

.tool-card .tool-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  background: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--teal);
  border: 2px solid var(--teal);
  transition: all 0.25s ease;
}

.tool-card:hover .tool-icon {
  background: var(--teal);
  color: #fff;
}

.tool-card .tool-name {
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
}

.tool-card .tool-category {
  font-size: 11px;
  color: var(--ink-mute);
  letter-spacing: 0.05em;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.scenario-card {
  background: linear-gradient(135deg, #fff 0%, var(--paper-warm) 100%);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.scenario-card::after {
  content: "";
  position: absolute;
  top: -20px;
  right: -20px;
  width: 80px;
  height: 80px;
  background: radial-gradient(circle, rgba(192, 133, 82, 0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.scenario-card:hover {
  border-color: var(--amber-soft);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.scenario-card .scenario-tag {
  display: inline-block;
  font-size: 11px;
  color: var(--amber-deep);
  background: rgba(192, 133, 82, 0.12);
  padding: 3px 10px;
  border-radius: 2px;
  margin-bottom: 12px;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.scenario-card .scenario-title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}

.scenario-card .scenario-desc {
  font-size: 13.5px;
  color: var(--ink-soft);
  line-height: 1.8;
  margin-bottom: 12px;
}

.scenario-card .scenario-detail {
  font-size: 12.5px;
  color: var(--ink-mute);
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

.scenario-card .scenario-detail strong {
  color: var(--teal);
  font-weight: 600;
}

.prospect-charts {
  margin-top: 24px;
}

.chart-block {
  margin-bottom: 32px;
}

.chart-block:last-child {
  margin-bottom: 0;
}

.chart-title {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 8px;
}

.chart-title::before {
  content: "◢";
  color: var(--amber);
  font-size: 12px;
}

.bar-chart {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.bar-row {
  display: grid;
  grid-template-columns: 140px 1fr 80px;
  align-items: center;
  gap: 12px;
  font-size: 13px;
}

.bar-label {
  color: var(--ink-soft);
  font-weight: 500;
}

.bar-track {
  height: 24px;
  background: var(--paper-warm);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
}

.bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--teal) 0%, var(--teal-soft) 100%);
  border-radius: 2px;
  transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
  width: 0;
  position: relative;
}

.bar-fill.amber {
  background: linear-gradient(90deg, var(--amber) 0%, var(--amber-soft) 100%);
}

.bar-value {
  font-family: var(--font-serif);
  font-weight: 600;
  color: var(--teal);
  text-align: right;
  font-size: 14px;
}

.bar-value.amber {
  color: var(--amber-deep);
}

.trend-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 16px;
}

.trend-item {
  background: var(--paper-warm);
  padding: 16px;
  border-radius: var(--radius);
  border-left: 3px solid var(--jade);
}

.trend-item .trend-icon {
  font-size: 18px;
  color: var(--jade);
  margin-bottom: 8px;
}

.trend-item .trend-title {
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.trend-item .trend-desc {
  font-size: 12.5px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.ethics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.ethics-card {
  display: flex;
  gap: 16px;
  padding: 20px;
  background: #fff;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  transition: all 0.25s ease;
}

.ethics-card:hover {
  border-color: var(--amber-soft);
  background: var(--paper-warm);
}

.ethics-card .ethics-mark {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: var(--teal);
  color: #fff;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
}

.ethics-card .ethics-content h4 {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.ethics-card .ethics-content p {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.75;
  margin: 0;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1024px) {
  .section {
    padding: 48px 40px;
  }

  .ability-grid,
  .tool-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .overview-grid,
  .work-modules,
  .knowledge-map,
  .scenario-grid,
  .ethics-grid {
    grid-template-columns: 1fr;
  }

  .trend-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 36px 20px;
  }

  .section-header {
    flex-direction: column;
    gap: 8px;
  }

  .section-number {
    border-right: none;
    border-bottom: 2px solid var(--amber);
    width: auto;
    text-align: left;
    padding: 0 0 4px 0;
  }

  .section-title {
    font-size: 22px;
  }

  .ability-grid,
  .tool-grid,
  .overview-stats {
    grid-template-columns: 1fr;
  }

  .bar-row {
    grid-template-columns: 100px 1fr 60px;
    font-size: 12px;
  }

  .definition-box {
    padding: 20px;
  }

  .definition-box .def-text {
    font-size: 15px;
  }

  .page-header h1 {
    font-size: 26px;
  }
}