:root{--bg:#0a0a14;--bg2:#11121e;--text:#f5f5fb;--muted:#8e8fa6;--line:#1f2033;--accent:#1fd1a8;--accent2:#ff5b9a}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,'Microsoft YaHei',sans-serif;overflow-x:hidden}a{color:inherit;text-decoration:none}.wrap{max-width:1320px;margin:0 auto;padding:0 6vw}.topnav{position:fixed;top:0;left:0;right:0;height:74px;display:flex;align-items:center;justify-content:space-between;padding:0 6vw;background:rgba(10,10,20,.78);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);z-index:10}.topnav .brand{display:flex;gap:10px;align-items:center;font-size:20px;font-weight:800;letter-spacing:1px}.topnav .brand img{width:32px;height:32px;object-fit:cover;border-radius:8px;background:transparent}.topnav .brand span{display:inline-block;color:var(--text)}.topnav ul{display:flex;gap:28px;list-style:none;margin:0;padding:0;font-size:14px}.topnav ul a{color:#b8b9c9}.topnav ul 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