:root {
  --paper: #f5ead6;
  --paper-light: #fff8ea;
  --paper-deep: #e6d2aa;
  --ink: #21160f;
  --ink-soft: #6b5943;
  --ink-line: rgba(33, 22, 15, 0.16);
  --cinnabar: #b9472a;
  --cinnabar-deep: #8f2e1d;
  --cinnabar-soft: rgba(185, 71, 42, 0.14);
  --water-ink: #607f82;
  --stone-gray: #8d806d;
  --shadow-warm: rgba(63, 43, 24, 0.28);
}

.bridge-ai {
  color: var(--ink);
  font-family: "STKaiti", "KaiTi", "Kaiti SC", "Songti SC", "Noto Serif SC", serif;
}