:root{--yantu-paper:#fffefa;--yantu-periwinkle:#f2f4f1;--yantu-ink:#142039;--yantu-muted:#667085;--yantu-indigo:#485bd8;--yantu-violet:#7258d7;--yantu-live:#2d8064;--yantu-sky:#377da3;--yantu-amber:#b86a2e;--yantu-rule:#1420391c;--yantu-gradient:linear-gradient(135deg, #485bd8 0%, #6258d4 100%);--yantu-shadow:0 22px 58px #1420391f;--yantu-serif:"Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", serif;--yantu-numeric:"DIN Alternate", "IBM Plex Mono", "Arial Narrow", sans-serif}*{box-sizing:border-box}html{background:var(--yantu-periwinkle);color:var(--yantu-ink);font-family:PingFang SC,Noto Sans CJK SC,system-ui,-apple-system,sans-serif;overflow-x:hidden}body{min-width:320px;margin:0;overflow-x:hidden}button,textarea,input{color:inherit;font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}:focus-visible{outline-offset:3px;outline:3px solid 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