:root{--paper:#f4f3eb;--ink:#24291d;--muted:#66705e;--line:#d9ddcf;--lime:#d6ed96;--green:#526941;--white:#fcfcf8;--mono:Consolas,"Courier New",monospace}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;font-size:15px;line-height:1.7}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}button,a,input,textarea,summary{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}a:focus-visible,button:focus-visible,summary:focus-visible,pre:focus-visible{outline:3px solid var(--green);outline-offset:4px}input:focus,textarea:focus{outline:2px solid var(--green);outline-offset:2px}[hidden]{display:none!important}.shell{width:min(1180px,calc(100% - 80px));margin-inline:auto}.site-header{width:min(1280px,calc(100% - 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