:root{--ink:#17211f;--muted:#63706c;--line:#dce2df;--paper:#ffffff;--ground:#f3f5f1;--primary:#086b57;--primary-dark:#075444;--audio:#d85b3a;--pdf:#1472a3;--image:#8b6a12;--warning-bg:#fff4ef;--warning:#a53e27;--shadow:0 10px 30px rgba(21,39,34,0.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--ground);font-family:Microsoft YaHei,PingFang SC,Noto Sans CJK SC,Arial,sans-serif;font-size:15px;line-height:1.65;letter-spacing:0;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input{font:inherit;letter-spacing:0}a,button{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid rgba(8,107,87,.24);outline-offset:2px}.shell{width:min(1120px,calc(100% - 40px));margin:0 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