:root{--bg:#0A0E17;--bg2:#0E1424;--card:#121A2E;--line:rgba(255,255,255,.08);--blue:#3D7BFF;--cyan:#45E0FF;--text:#E8ECF5;--dim:#8A93A8;--grad:linear-gradient(120deg,#3D7BFF,#45E0FF)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--text);font-family:PingFang SC,Microsoft YaHei,system-ui,sans-serif;overflow-x:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}::selection{background:var(--blue);color:#fff}.nav{position:fixed;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:0 48px;height:72px;backdrop-filter:blur(16px);background:#0a0e1799;border-bottom:1px solid transparent;transition:.3s}.nav.scrolled{border-bottom-color:var(--line);background:#0a0e17d9}.logo{display:flex;align-items:center;gap:12px;font-weight:800;font-size:20px;letter-spacing:2px}.logo 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