:root{color-scheme:dark;--bg:#0b191e;--panel:#11252c;--line:#2a4048;--ink:#e8eee8;--muted:#9cafaF;--orange:#ffaf77;--blue:#8ec9dc;--green:#b9d59a}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:"Segoe UI","Microsoft YaHei",sans-serif;font-size:14px}button,a,input{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid var(--green);outline-offset:4px}button{transition:background .18s,color .18s}a{color:inherit}header,main,footer{max-width:1280px;margin:auto}header{height:92px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:20px}.brand{display:flex;align-items:center;gap:12px;font-size:20px;font-weight:700;text-decoration:none}.brand 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