:root{--color-primary: #2563eb;--color-success: #16a34a;--color-warning: #d97706;--color-danger: #dc2626;--color-neutral: #6b7280;--color-text-primary: #1f2937;--color-text-secondary: #6b7280;--color-text-tertiary: #9ca3af;--color-border: #e5e7eb;--color-border-strong: #d1d5db;--color-bg-page: #f5f6fa;--color-bg-surface: #ffffff;--color-bg-hover: #f3f4f6;--color-focus: #2563eb;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 24px;--space-6: 32px;--space-7: 48px;--radius-sm: 6px;--radius-md: 8px;--radius-lg: 12px;--shadow-card: 0 1px 2px rgba(16, 24, 40, .04);--shadow-overlay: 0 8px 24px rgba(16, 24, 40, .12)}body{margin:0;background:var(--color-bg-page);color:var(--color-text-primary);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;font-size:14px;line-height:1.6}#root{min-height:100vh}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--color-focus);outline-offset:2px;border-radius:var(--radius-sm)}code,.np-mono,pre{font-family:ui-monospace,SFMono-Regular,SF Mono,Menlo,Consolas,Liberation Mono,monospace;font-size:13px;line-height:1.45}.np-container{width:100%;padding:24px clamp(16px,3.5vw,48px) 32px}.np-app-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}@media(max-width:768px){.np-container{padding:16px 16px 24px}.np-app-grid{grid-template-columns:1fr}}.np-md{font-size:14px;line-height:1.8;color:var(--color-text-primary);word-break:break-word}.np-md h1{font-size:22px;margin:20px 0 10px}.np-md h2{font-size:18px;margin:22px 0 8px;padding-bottom:6px;border-bottom:1px solid var(--color-border)}.np-md h3{font-size:16px;margin:18px 0 6px}.np-md h4{font-size:14px;margin:14px 0 6px}.np-md h1:first-child,.np-md h2:first-child{margin-top:0}.np-md p{margin:8px 0}.np-md ul,.np-md ol{padding-left:24px;margin:8px 0}.np-md li{margin:3px 0}.np-md blockquote{margin:10px 0;padding:8px 14px;border-inline-start:3px solid var(--color-primary);background:var(--color-bg-hover);border-radius:var(--radius-sm);color:var(--color-text-secondary)}.np-md pre{background:#0f172a;color:#e2e8f0;padding:12px 14px;border-radius:var(--radius-md);overflow-x:auto;margin:10px 0}.np-md pre code{background:none;color:inherit;padding:0}.np-md code{background:var(--color-bg-hover);border:1px solid var(--color-border);border-radius:4px;padding:1px 5px}.np-md a{color:var(--color-primary)}.np-md hr{border:none;border-top:1px solid var(--color-border);margin:18px 0}.np-md-table-wrap{overflow-x:auto;margin:10px 0}.np-md table{border-collapse:collapse;width:100%;font-size:13px}.np-md th,.np-md td{border:1px solid var(--color-border);padding:6px 10px;text-align:left;vertical-align:top}.np-md th{background:var(--color-bg-hover);font-weight:600;white-space:nowrap}.np-skip-link{position:absolute;left:-9999px;top:0;z-index:1000;background:var(--color-bg-surface);color:var(--color-primary);padding:8px 16px;border:1px solid var(--color-border);border-radius:var(--radius-md)}.np-skip-link:focus{left:8px;top:8px}