:root{--bg:#f5f3f0;--card-bg:#fff;--text-primary:#1a1a2e;--text-secondary:#5a5a7a;--text-muted:#8a8aa0;--accent:#6c5ce7;--accent-light:#a29bfe;--accent-glow:#6c5ce740;--nav-bg:#ffffffb8;--border:#e8e6f0;--shadow-sm:0 1px 3px #0000000a, 0 1px 2px #0000000f;--shadow-md:0 4px 16px #0000000f, 0 2px 6px #0000000a;--shadow-lg:0 12px 32px #00000014, 0 4px 12px #0000000a;--shadow-xl:0 20px 48px #0000001f, 0 8px 20px #0000000f;--radius-sm:10px;--radius-md:16px;--radius-lg:22px;--radius-xl:28px;--radius-full:9999px;--transition-fast:.2s cubic-bezier(.4, 0, .2, 1);--transition-smooth:.35s cubic-bezier(.4, 0, .2, 1);--font-sans:"Inter", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, -apple-system, sans-serif}.dark{--bg:#0f0f1a;--card-bg:#1a1a2e;--text-primary:#e8e8f0;--text-secondary:#b0b0c8;--text-muted:#7878a0;--accent:#a78bfa;--accent-light:#c4b5fd;--accent-glow:#a78bfa4d;--nav-bg:#1a1a2ec7;--border:#2a2a42;--shadow-sm:0 1px 3px #0003, 0 1px 2px #0000004d;--shadow-md:0 4px 16px #0000004d, 0 2px 6px #00000040;--shadow-lg:0 12px 32px #0006, 0 4px 12px #0000004d;--shadow-xl:0 20px 48px #00000080, 0 8px 20px #00000059}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;scroll-padding-top:90px}body{font-family:var(--font-sans);background-color:var(--bg);color:var(--text-primary);min-height:100vh;transition:background-color var(--transition-smooth), color var(--transition-smooth);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.6}.page-bg{z-index:-2;filter:blur(2px);opacity:0;background-position:50%;background-repeat:no-repeat;background-size:cover;transition:opacity .4s,inset 1.6s;position:fixed;inset:-36px}.page-bg-mask{opacity:.8;background:var(--bg);width:100%;height:100%}.navbar{z-index:1000;background:var(--nav-bg);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--border);border-radius:var(--radius-xl);width:calc(100% - 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