:root{--paper:#f2f0e9;--bright:#fbfaf6;--ink:#17211d;--muted:#686b65;--green:#19332b;--green-2:#27483c;--red:#b9362d;--yellow:#e4b94c;--line:rgba(23,33,29,.18)}*{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--paper);color:var(--ink);font-family:Arial,"Microsoft YaHei",sans-serif}body{margin:0;overflow-x:hidden}body.menu-open{overflow:hidden}a{color:inherit;text-decoration:none}button{font:inherit}.shell{width:min(1240px,calc(100% - 68px));margin-inline:auto}.skip-link,.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link:focus{z-index:1000;top:10px;left:10px;width:auto;height:auto;padding:10px;background:#fff;clip:auto}.reading-progress{position:fixed;z-index:500;top:0;left:0;width:100%;height:3px}.reading-progress 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