/* po-fu-chen-zhou — 哈鲁 · 破釜沉舟（溪水绿青） */
:root {
  --story-bg: #004d40;
  --story-primary: #80deea;
  --story-accent: #26a69a;
  --story-gradient: linear-gradient(180deg, #004d40 0%, #00838f 60%, #b2ebf2 100%);
  --story-card-bg: rgba(255, 255, 255, 0.08);
  --story-text: #e0f7fa;
  --story-text-secondary: rgba(224, 247, 250, 0.72);
  --story-glow: 0 0 30px rgba(255, 255, 255, 0.2);
}
body { background: var(--story-bg); color: var(--story-text); }
.btn-primary {
  background: linear-gradient(135deg, #80deea, #00838f);
  color: #004d40;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}
.choice-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 2px solid rgba(255, 255, 255, 0.22);
}
.choice-btn:hover { border-color: #80deea; box-shadow: 0 0 18px rgba(255, 255, 255, 0.15); }
.confirm-overlay { background: rgba(0, 0, 0, 0.88); }
.confirm-card { border: 2px solid rgba(255, 255, 255, 0.18); }
.knowledge-card { border-left: 3px solid #80deea; }
.parent-hint-toggle { color: #80deea; }