*,:after,:before{box-sizing:border-box;margin:0;padding:0}body{background:#120e1f;color:#f4f1ff}.rainbow-rule{position:fixed;top:0;left:0;right:0;height:6px;z-index:9999;background:linear-gradient(90deg,#8174f5 0 20%,#a99ff7 20% 40%,#f7b801 40% 60%,#f18701 60% 80%,#f35b04 80% 100%)}