:root{--bg:#111114;--panel:#18181c;--line:#303036;--text:#f2f2ef;--muted:#96969f;--accent:#889cff;--ink:#15151b;--mono:'SFMono-Regular',Consolas,'Courier New',monospace;color-scheme:dark}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,'Microsoft YaHei',sans-serif;font-size:14px}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button{cursor:pointer;background:none;color:inherit;border:0}a,button{transition:color .2s,background .2s}button:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:5px}a:hover,button:hover{color:var(--accent)}header{height:76px;display:flex;align-items:center;gap:30px;padding:0 4.4%;position:sticky;top:0;z-index:20;border-bottom:1px solid var(--line);background:#111114f2;backdrop-filter:blur(16px)}.brand{font:bold 19px 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