:root{--paper:#f9f6ef;--ink:#302e28;--muted:#6e6a61;--red:#be463b;--line:#dfdacf;--olive:#6f7655;--serif:"Songti SC","STSong","Noto Serif CJK SC",serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}img{display:block;max-width:100%;height:auto}p{line-height:1.85}h1,h2,h3,p{margin-top:0}h1,h2{font-family:var(--serif);font-weight:600}a:focus-visible,summary:focus-visible{outline:3px solid var(--red);outline-offset:6px;border-radius:3px}.wrap{width:min(1184px,calc(100% - 96px));margin-inline:auto}.skip{position:fixed;top:-100px;left:15px;z-index:99;padding:12px;background:white}.skip:focus{top:12px}.header{border-bottom:1px solid 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