:root{--bg:#fff;--alt:#f4f7fb;--ink:#14213d;--muted:#5b6475;--pri:#2557d6;--pri2:#1b3fa0;--acc:#14b8a6;--line:#e3e8f0;--r:14px}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
a{color:var(--pri)}h1,h2,h3{line-height:1.2}h1{font-size:clamp(2rem,4.5vw,3rem);margin:.2em 0}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}.narrow{max-width:760px}.center{text-align:center}
section{padding:56px 0}.alt{background:var(--alt)}
.site-header{position:sticky;top:0;background:rgba(255,255,255,.95);backdrop-filter:blur(6px);border-bottom:1px solid var(--line);z-index:10}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{font-weight:600;text-decoration:none;color:var(--ink);display:flex;align-items:center;gap:8px}.brand b{color:var(--pri)}
.logo{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--pri),var(--acc));color:#fff;font-weight:800;font-size:.9rem}
.nav{display:flex;align-items:center;gap:18px}.nav a{text-decoration:none;color:var(--ink);font-size:.95rem}.nav a.active{color:var(--pri);font-weight:600}.nav a.btn{color:#fff}
.navtoggle,.burger{display:none}
@media(max-width:860px){.burger{display:block;font-size:1.6rem;cursor:pointer}.nav{display:none;position:absolute;top:66px;left:0;right:0;background:#fff;flex-direction:column;padding:16px;border-bottom:1px solid var(--line)}.navtoggle:checked~.nav{display:flex}}
.btn{display:inline-block;background:var(--pri);color:#fff;padding:12px 22px;border-radius:10px;text-decoration:none;font-weight:600;border:0;cursor:pointer;font-size:1rem;margin:4px 0}
.btn:hover{background:var(--pri2)}.btn-ghost{background:transparent;color:var(--pri);border:2px solid var(--pri)}.btn-ghost:hover{background:var(--alt)}
.btn-sm{padding:8px 14px;font-size:.9rem}.btn-block{display:block;text-align:center}
.hero{background:linear-gradient(160deg,#eef3ff,#f0fdfa);padding:72px 0}
.hero-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:40px;align-items:center}
.eyebrow{color:var(--acc);font-weight:700;text-transform:uppercase;letter-spacing:.05em;font-size:.8rem}.lead{font-size:1.15rem;color:var(--muted)}
.hero-card,.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px;box-shadow:0 6px 24px rgba(20,33,61,.06)}
.bubble{padding:10px 14px;border-radius:14px;max-width:85%;margin:8px 0}.bot{background:var(--alt)}.user{background:var(--pri);color:#fff;margin-left:auto}
.grid3,.grid4{display:grid;gap:22px}.grid3{grid-template-columns:repeat(3,1fr)}.grid4{grid-template-columns:repeat(4,1fr)}
@media(max-width:960px){.grid4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:760px){.hero-grid,.grid3,.grid4,.demo-grid,.foot-grid{grid-template-columns:1fr!important}}
.step span{display:inline-grid;place-items:center;width:40px;height:40px;border-radius:50%;background:var(--pri);color:#fff;font-weight:700}
.page-head{background:linear-gradient(160deg,#eef3ff,#f0fdfa);padding:48px 0}
.svc-list{display:grid;gap:22px}
ul.check{list-style:none;padding:0}ul.check li{padding-left:26px;position:relative;margin:6px 0}ul.check li:before{content:"\2713";position:absolute;left:0;color:var(--acc);font-weight:700}
.price .amt{font-size:2.2rem;font-weight:800;margin:0}.price .amt small{font-size:.9rem;color:var(--muted);font-weight:400}.featured{border:2px solid var(--pri)}
.small{font-size:.85rem;color:var(--muted)}.muted{color:var(--muted)}.todo{color:#b45309}
form label{display:block;margin:12px 0;font-weight:500}form input,form select,form textarea{display:block;width:100%;margin-top:4px;padding:11px;border:1px solid var(--line);border-radius:9px;font:inherit}
label.inline{display:flex;gap:8px;align-items:flex-start;font-weight:400}label.inline input{width:auto;margin-top:5px}
details.card{margin:12px 0}summary{font-weight:600;cursor:pointer}
.prose h2{font-size:1.25rem;margin-top:1.6em}
.cta{background:var(--ink);color:#fff;text-align:center}.cta .btn-ghost{color:#fff;border-color:#fff}.cta .btn-ghost:hover{background:rgba(255,255,255,.1)}
.site-footer{background:#0d1730;color:#c7cfdf;padding:44px 0 20px}.site-footer a{display:block;color:#c7cfdf;text-decoration:none;margin:4px 0}.site-footer .brand{color:#fff}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:24px}.site-footer h4{color:#fff;margin:0 0 8px}.copy{font-size:.8rem;margin-top:24px}
.demo-grid{display:grid;grid-template-columns:1.6fr 1fr;gap:24px;align-items:start}
.chat{border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column;height:560px;background:#fff;box-shadow:0 6px 24px rgba(20,33,61,.08)}
.chat-head{background:var(--pri);color:#fff;padding:14px 16px;font-weight:600}.dot{display:inline-block;width:9px;height:9px;border-radius:50%;background:#4ade80;margin-right:6px}
.chat-log{flex:1;overflow-y:auto;padding:14px}.quick{display:flex;flex-wrap:wrap;gap:6px;padding:0 14px 8px}
.quick button{background:var(--alt);border:1px solid var(--line);border-radius:999px;padding:6px 12px;cursor:pointer;font:inherit;font-size:.85rem}
.chat-input{display:flex;gap:8px;padding:10px;border-top:1px solid var(--line)}.chat-input input{flex:1;padding:10px;border:1px solid var(--line);border-radius:9px;font:inherit}
.checklist{list-style:none;padding:0}.checklist li{padding:8px 0;border-bottom:1px solid var(--line)}.checklist input{margin-right:8px}
dl.cap dt{font-weight:600}dl.cap dd{margin:0 0 6px}