:root{--paper:#f6f5f0;--ink:#172d38;--muted:#617079;--line:#d7dfdd;--accent:#177462;--pale:#e6ede6;--mono:ui-monospace,SFMono-Regular,Consolas,monospace}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.8 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}a{color:var(--accent);text-underline-offset:4px}button,select{font:inherit}a,button,select,pre,[tabindex]{outline-offset:5px}:focus-visible{outline:3px solid #b57225}button,a{touch-action:manipulation}.skip{position:absolute;left:15px;top:-100px;background:#fff;padding:10px;z-index:10}.skip:focus{top:8px}.masthead{max-width:1440px;margin:auto;display:flex;justify-content:space-between;gap:16px;padding:26px 40px;border-bottom:1px solid var(--line);font-size:13px}.masthead>a{font-weight:700;color:var(--ink);text-decoration:none}.masthead>a span,.masthead>span{color:var(--muted);font-weight:400}.layout{display:grid;grid-template-columns:225px 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@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
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