:root{--bg:#f6f7f9;--panel:#fff;--ink:#1d2736;--muted:#778395;--line:#e6e9ef;--accent:#2563eb;--soft:#eff5ff;color-scheme:light}*{box-sizing:border-box}body{margin:0;font:14px 'Microsoft YaHei',system-ui,sans-serif;color:var(--ink);background:var(--bg)}body.dark{--bg:#111722;--panel:#1a2230;--ink:#e8eef7;--muted:#9ca8b9;--line:#303a4b;--accent:#6094ff;--soft:#263855;color-scheme:dark}button,input,select,textarea{font:inherit}button{padding:9px 14px;border:1px solid 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