:root{--bg:#070b14;--bg-soft:#0b1120;--panel:#0f172aa8;--panel-solid:#0d1526;--border:#94a3b824;--border-strong:#94a3b847;--text:#e6ecf5;--text-dim:#9aa7bd;--text-faint:#64748b;--accent:#22d3ee;--accent-2:#3b82f6;--accent-3:#8b5cf6;--gradient:linear-gradient(135deg, #22d3ee 0%, #3b82f6 55%, #8b5cf6 100%);--radius:16px;--radius-sm:10px;--maxw:1080px;--nav-h:64px;--font:"PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;--mono:"JetBrains Mono", "Cascadia Code", Consolas, "Courier New", monospace}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--text);font-family:var(--font);-webkit-font-smoothing:antialiased;min-height:100vh;font-size:16px;line-height:1.75}body:before{content:"";z-index:-2;background:radial-gradient(900px 480px at 15% -10%, #22d3ee24, transparent 60%), radial-gradient(900px 520px at 90% 0%, #8b5cf61f, transparent 60%), radial-gradient(800px 500px 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