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system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--nk-font-mono: "JetBrains Mono", "Fira Code", ui-monospace, monospace;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-xl: 24px;--shadow-sm: 0 1px 3px rgba(22, 20, 45, .08);--shadow-md: 0 4px 16px rgba(22, 20, 45, .1);--shadow-lg: 0 12px 40px rgba(22, 20, 45, .14);--shadow-xl: 0 24px 64px rgba(22, 20, 45, .18)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;font-size:16px}body{font-family:var(--nk-font);color:var(--nk-text-primary);background:var(--nk-bg-surface);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}img{max-width:100%;height:auto;display:block}a{color:var(--nk-accent);text-decoration:none}button{font-family:var(--nk-font);cursor:pointer;border:none;background:none}.container{max-width:1100px;margin:0 auto;padding:0 24px}.btn-primary{display:inline-flex;align-items:center;gap:8px;padding:10px 22px;background:var(--nk-accent);color:#fff;border-radius:var(--radius-md);font-size:15px;font-weight:600;line-height:1;transition:background .18s,transform .12s;white-space:nowrap}.btn-primary:hover{background:var(--nk-accent-hover);transform:translateY(-1px)}.btn-ghost{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;background:transparent;color:var(--nk-text-secondary);border:1.5px solid var(--nk-border-strong);border-radius:var(--radius-md);font-size:15px;font-weight:500;transition:border-color .18s,color .18s,background .18s}.btn-ghost:hover{border-color:var(--nk-accent);color:var(--nk-accent);background:var(--nk-accent-muted)}@media(max-width:768px){.container{padding:0 16px}}