:root{
  --ink:#1A2A3A; --ink-2:#4A5A6A; --cream:#E0F7FA; --cream-2:#B2EBF2;
  --bg:#0E2830; --bar:rgba(224,247,250,.95); --accent:#4DD0E1; --accent-2:#00838F;
  --purple:#7E57C2; --sun:#FFE08A; --title:#80DEEA; --sky:linear-gradient(180deg,#0e2830,#156575 45%,#b2ebf2);
  --sci-bg:#E0F7FA; --r:28px;
  --font-d:"ZCOOL KuaiLe","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-b:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}

/* topic accents */
.hero-emoji{font-size:clamp(120px,28vw,220px);filter:drop-shadow(0 14px 18px rgba(0,0,0,.28));}
.disclaimer{font-size:.85rem;opacity:.85;margin:.6rem 0 0;max-width:36em;}