:root{--bg:#f7f8fb;--surface:#ffffff;--text:#0f172a;--muted:#5b6474;--border:#e3e7ee;--accent:#1d4ed8;--accent-2:#1e40af;--accent-soft:#e8efff;--ok:#15803d;--ok-soft:#e7f6ec;--warn:#b45309;--warn-soft:#fff4e0;--danger:#b91c1c;--danger-soft:#fde8e8;--radius:12px;--shadow:0 8px 30px rgba(15,23,42,0.06)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.55 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3{line-height:1.2;margin:0 0 .5em;letter-spacing:-.01em}h1{font-size:clamp(2rem,4.5vw,3.2rem);font-weight:800}h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:750}h3{font-size:1.15rem;font-weight:700}p{margin:0 0 1em}code,pre{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.9em}pre{background:#0b1220;color:#e2e8f0;padding:14px 16px;border-radius:10px;overflow-x:auto}.container{max-width:1100px;margin:0 auto;padding:0 20px}.narrow{max-width:760px}.nav{background:var(--surface);border-bottom:1px solid var(--border);position:-webkit-sticky;position:sticky;top:0;z-index:50}.nav .container{gap:24px;height:64px}.brand,.nav .container{display:flex;align-items:center}.brand{font-weight:800;font-size:1.15rem;color:var(--text);gap:8px}.brand .mark{width:28px;height:28px;border-radius:8px;background:var(--accent);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;letter-spacing:.5px}.nav-links{display:flex;gap:18px;margin-left:auto;align-items:center}.nav-links a{color:var(--muted);font-weight:500}.nav-links a:hover{color:var(--text);text-decoration:none}.nav-links a.btn-primary,.nav-links a.btn-primary:hover{color:#fff}@media (max-width:720px){.nav-links .hide-sm{display:none}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 18px;border-radius:10px;font-weight:650;border:1px solid transparent;cursor:pointer;font-size:15px;transition:transform .05s ease,background .15s ease;text-decoration:none!important}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-2)}.btn-secondary{background:var(--surface);color:var(--text);border-color:var(--border)}.btn-secondary:hover{background:#f1f4f9}.btn-ghost{background:transparent;color:var(--accent)}.btn-sm{padding:7px 12px;font-size:13px;border-radius:8px}.btn[disabled]{opacity:.55;cursor:not-allowed}.hero{padding:72px 0 40px}.hero .eyebrow{display:inline-block;background:var(--accent-soft);color:var(--accent-2);padding:5px 12px;border-radius:999px;font-size:13px;font-weight:650;margin-bottom:18px}.hero p.lead{font-size:1.2rem;color:var(--muted);max-width:640px}.section{padding:56px 0}.section.alt{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.grid{display:grid;grid-gap:20px;gap:20px}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}@media (max-width:900px){.grid-3,.grid-4{grid-template-columns:1fr 1fr}}@media (max-width:640px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}.card h3{margin-top:0}.muted{color:var(--muted)}.small{font-size:.9rem}.tiny{font-size:.8rem}.stack>*+*{margin-top:14px}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.between{justify-content:space-between}hr{border:0;border-top:1px solid var(--border);margin:24px 0}.pill{display:inline-block;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:650}.pill-ok{background:var(--ok-soft);color:var(--ok)}.pill-warn{background:var(--warn-soft);color:var(--warn)}.pill-danger{background:var(--danger-soft);color:var(--danger)}.pill-info{background:var(--accent-soft);color:var(--accent-2)}.pill-muted{background:#eef1f6;color:var(--muted)}label{display:block;font-weight:600;font-size:14px;margin-bottom:6px}input[type=email],input[type=number],input[type=text],input[type=url],select,textarea{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:9px;font:inherit;background:#fff;color:var(--text)}input:focus,select:focus,textarea:focus{outline:2px solid var(--accent-soft);border-color:var(--accent)}.field{margin-bottom:16px}.check{display:flex;gap:10px;align-items:flex-start;font-weight:500;font-size:15px;padding:8px 0}.check input,.help{margin-top:4px}.help{color:var(--muted);font-size:13px}.error{background:var(--danger-soft);color:var(--danger)}.error,.notice{padding:10px 12px;border-radius:9px;font-size:14px}.notice{background:var(--accent-soft);color:var(--accent-2)}.success{background:var(--ok-soft);color:var(--ok);padding:10px 12px;border-radius:9px;font-size:14px}table{width:100%;border-collapse:collapse;font-size:14px}td,th{text-align:left;padding:10px;border-bottom:1px solid var(--border);vertical-align:top}th{color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.04em}.table-wrap{overflow-x:auto}.price{font-size:2.2rem;font-weight:800;letter-spacing:-.02em}.price span{font-size:1rem;font-weight:500;color:var(--muted)}.plan-featured{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft),var(--shadow);position:relative}.plan-featured .tag{position:absolute;top:-12px;left:20px;background:var(--accent);color:#fff;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:700}.features{list-style:none;padding:0;margin:16px 0}.features li{padding:6px 0 6px 24px;position:relative;font-size:14px}.features li:before{content:"✓";position:absolute;left:0;color:var(--ok);font-weight:800}.toggle{display:inline-flex;background:#eef1f6;border-radius:999px;padding:4px;gap:4px}.toggle button{border:0;background:transparent;padding:7px 14px;border-radius:999px;font-weight:650;cursor:pointer;color:var(--muted);font-size:14px}.toggle button.on{background:#fff;color:var(--text);box-shadow:0 1px 4px rgba(0,0,0,.08)}.score{display:flex;align-items:center;gap:18px}.score .num{font-size:3rem;font-weight:800;line-height:1}.bar{height:10px;background:#eef1f6;border-radius:999px;overflow:hidden}.bar>div{height:100%;background:linear-gradient(90deg,#22c55e,#f59e0b,#ef4444)}.footer{padding:40px 0;color:var(--muted);font-size:14px;border-top:1px solid var(--border);margin-top:40px}.footer .row{justify-content:space-between}.demo{position:relative;min-height:220px;background:linear-gradient(135deg,#eef2ff,#f8fafc);border:1px dashed var(--border);border-radius:var(--radius);overflow:hidden}.demo .fake-chat{position:absolute;right:16px;bottom:16px;width:56px;height:56px;border-radius:50%;background:#111827;box-shadow:0 8px 20px rgba(0,0,0,.2)}.demo .notice-demo{position:absolute;right:16px;bottom:88px;max-width:320px;background:#fff;border:1px solid var(--border);border-left:4px solid var(--accent);border-radius:12px;padding:14px 16px;box-shadow:0 10px 30px rgba(0,0,0,.15);font-size:14px}.demo .notice-demo .ic{display:inline-flex;width:22px;height:22px;border-radius:6px;background:var(--accent);color:#fff;font-size:11px;font-weight:700;align-items:center;justify-content:center;margin-right:8px;vertical-align:middle}@media print{.footer,.nav,.no-print{display:none!important}body{background:#fff}.card{box-shadow:none}}