:root{--ink:#1f1a17;--ink-2:#4a433e;--muted:#6b625c;--line:#e6dfd9;--line-2:#cfc5bc;--bg:#f6f3f0;--brand:#8a5634;--brand-dk:#6e4428;--code:#ff6b5e;--nav-bg:#1f1a17;--nav-fg:#d9d0c9;--nav-w:256px;color:var(--ink);background:var(--bg);font-family:IBM Plex Sans,Noto Sans SC,Microsoft YaHei,PingFang SC,Noto Sans CJK SC,system-ui,sans-serif;font-size:14px;line-height:1.45}*{box-sizing:border-box}body{margin:0}button{font:inherit}.muted{color:var(--muted)}.small{font-size:11px}.grow{flex:1;min-width:0}.sr{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.snum{color:var(--code);letter-spacing:.04em;font-variant-numeric:tabular-nums;flex:none;margin-left:6px;font-family:IBM Plex Mono,monospace;font-size:10px;font-weight:700}h1 .snum,h2 .snum{vertical-align:middle;font-size:12px}.shell{min-height:100vh;display:flex}.content{flex-direction:column;flex:1;min-width:0;display:flex}main{flex-direction:column;gap:20px;padding:24px 28px 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