:root{--ink:#1d2c3e;--muted:#536579;--line:#dce3e9;--paper:#fff;--ground:#f4f6f8;--blue:#1556a7;--teal:#08756b;--red:#b33a39;--gold:#95641d;--soft:#edf3f9}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;color:var(--ink);background:var(--ground);font:16px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}a{color:var(--blue);text-underline-offset:3px}button,select,input{font:inherit}button,select{background:#fff;border:1px solid #aab9c8;border-radius:6px;color:var(--ink);padding:7px 12px;cursor:pointer}button:hover,select:hover{border-color:var(--blue);background:#f4f8fd}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid #e3a63d;outline-offset:3px}header{position:sticky;top:0;z-index:4;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);padding:15px max(24px,calc((100% - 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