*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--color-primary: #3b82f6;--color-primary-dark: #2563eb;--color-bg: #ffffff;--color-bg-subtle: #f8fafc;--color-bg-muted: #f1f5f9;--color-text: #0f172a;--color-text-muted: #64748b;--color-border: #e2e8f0;--color-dem: #3b82f6;--color-rep: #ef4444;--radius: 8px;--max-width: 1200px}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--color-bg);color:var(--color-text);line-height:1.6;min-height:100vh}.nav-bar{background:var(--color-bg);border-bottom:1px solid var(--color-border);padding:0 24px;position:sticky;top:0;z-index:100}.nav-bar-inner{max-width:var(--max-width);margin:0 auto;display:flex;align-items:center;height:56px;gap:32px}.nav-logo{font-size:20px;font-weight:700;color:var(--color-primary);text-decoration:none}.nav-links{display:flex;gap:8px}.nav-link{padding:6px 14px;border-radius:var(--radius);text-decoration:none;color:var(--color-text-muted);font-size:14px;font-weight:500;transition:background .15s,color .15s}.nav-link:hover{background:var(--color-bg-muted);color:var(--color-text)}.nav-link.active{background:var(--color-primary);color:#fff}.main-content{max-width:var(--max-width);margin:0 auto;padding:32px 24px}.hero{text-align:center;padding:80px 0 48px}.hero h1{font-size:48px;font-weight:800;margin-bottom:16px}.hero h1 span{color:var(--color-primary)}.hero p{font-size:20px;color:var(--color-text-muted);max-width:600px;margin:0 auto 32px}.hero-stats{display:flex;justify-content:center;gap:48px;margin-top:40px}.hero-stat{text-align:center}.hero-stat-value{font-size:32px;font-weight:700;color:var(--color-primary)}.hero-stat-label{font-size:14px;color:var(--color-text-muted)}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;margin:48px 0}.feature-card{border:1px solid var(--color-border);border-radius:var(--radius);padding:24px;transition:box-shadow .2s}.feature-card:hover{box-shadow:0 4px 12px #00000014}.feature-card h3{font-size:18px;margin-bottom:8px}.feature-card p{font-size:14px;color:var(--color-text-muted)}.section{margin:48px 0}.section h2{font-size:28px;font-weight:700;margin-bottom:24px}.data-table{width:100%;border-collapse:collapse;font-size:14px}.data-table th,.data-table td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--color-border)}.data-table th{font-weight:600;background:var(--color-bg-subtle)}.data-table tr:hover td{background:var(--color-bg-muted)}.stat-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:32px}.stat-card{background:var(--color-bg-subtle);border:1px solid var(--color-border);border-radius:var(--radius);padding:20px}.stat-card-label{font-size:13px;color:var(--color-text-muted);margin-bottom:4px}.stat-card-value{font-size:28px;font-weight:700}.stat-card-sub{font-size:12px;color:var(--color-text-muted);margin-top:4px}.bar-chart{display:flex;align-items:flex-end;gap:12px;height:200px;padding-top:16px}.bar-chart-col{display:flex;flex-direction:column;align-items:center;flex:1}.bar-chart-bar{width:100%;max-width:60px;border-radius:4px 4px 0 0;transition:height .3s;min-height:2px}.bar-chart-label{font-size:11px;color:var(--color-text-muted);margin-top:6px;text-align:center}.bar-chart-value{font-size:12px;font-weight:600;margin-bottom:4px}.preview-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px}.preview-card{border:1px solid var(--color-border);border-radius:var(--radius);overflow:hidden}.preview-header{padding:12px 16px;background:var(--color-bg-subtle);border-bottom:1px solid var(--color-border);font-size:14px;font-weight:600}.preview-body{padding:20px}.loading{text-align:center;padding:48px;color:var(--color-text-muted);font-size:16px}.error{text-align:center;padding:48px;color:#ef4444;font-size:16px}.code-block{background:#1e293b;color:#e2e8f0;padding:16px 20px;border-radius:var(--radius);font-family:SF Mono,Monaco,Consolas,monospace;font-size:13px;line-height:1.5;overflow-x:auto;white-space:pre}.demo-toggle{display:inline-flex;align-items:center;gap:8px;cursor:pointer;-webkit-user-select:none;user-select:none}.demo-toggle-track{width:44px;height:24px;border-radius:12px;background:#cbd5e1;position:relative;transition:background .2s}.demo-toggle-track.on{background:var(--color-primary)}.demo-toggle-thumb{width:20px;height:20px;border-radius:50%;background:#fff;position:absolute;top:2px;left:2px;transition:transform .2s;box-shadow:0 1px 3px #0003}.demo-toggle-track.on .demo-toggle-thumb{transform:translate(20px)}