:root{
  --ink:#0e1b2a; --ink2:#42526a; --line:#e3e8ef; --bg:#ffffff; --soft:#f4f7fa;
  --brand:#19b47c; --brand-d:#0f8f61; --dark:#0b1624; --radius:14px;
  --font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.6;font-size:17px}
img{max-width:100%}
a{color:var(--brand-d)}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
h1,h2,h3{line-height:1.2;margin:0 0 .5em;letter-spacing:-.01em}
h1{font-size:clamp(2rem,4.6vw,3.3rem)}
h2{font-size:clamp(1.5rem,3vw,2.2rem)}
h3{font-size:1.15rem}
p{margin:0 0 1em}
.lead{font-size:1.2rem;color:var(--ink2);max-width:46rem}
.eyebrow{font-size:.8rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--brand-d);margin-bottom:.8rem}

/* Header */
.site-header{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;min-height:68px;gap:16px}
.logo{font-weight:800;font-size:1.35rem;letter-spacing:.14em;color:var(--ink);text-decoration:none}
.logo img{display:block;height:40px;width:auto}
nav ul{display:flex;gap:22px;list-style:none;margin:0;padding:0;align-items:center}
nav a{text-decoration:none;color:var(--ink);font-weight:500;font-size:.98rem}
nav a:hover,nav a[aria-current="page"]{color:var(--brand-d)}
.nav-toggle{display:none}
.nav-btn{display:none;cursor:pointer;font-size:1.6rem;line-height:1;padding:6px 10px}

/* Buttons */
.btn{display:inline-block;padding:13px 24px;border-radius:999px;font-weight:650;text-decoration:none;border:2px solid var(--brand);background:var(--brand);color:#fff;transition:.15s}
.btn:hover{background:var(--brand-d);border-color:var(--brand-d)}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--ink)}
.on-dark .btn.ghost{color:#fff;border-color:rgba(255,255,255,.35)}
.on-dark .btn.ghost:hover{border-color:#fff}
nav .btn{padding:9px 18px;color:#fff}
nav .btn:hover{color:#fff}
.btn-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:1.6rem}

/* Sections */
section{padding:84px 0}
.soft{background:var(--soft)}
.on-dark{background:var(--dark);color:#fff}
.on-dark .lead,.on-dark p{color:#b9c6d6}
.on-dark .eyebrow{color:var(--brand)}
.hero{padding:96px 0 88px;background:radial-gradient(900px 420px at 85% -10%,rgba(25,180,124,.28),transparent 60%),var(--dark)}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.page-hero{padding:72px 0 56px}

/* Chat mock */
.chat{background:#101f31;border:1px solid #22364d;border-radius:var(--radius);padding:20px;font-size:.95rem;box-shadow:0 30px 60px rgba(0,0,0,.35)}
.chat .q,.chat .a{padding:12px 14px;border-radius:12px;margin-bottom:12px}
.chat .q{background:#1b3149;color:#fff;margin-left:18%}
.chat .a{background:#fff;color:var(--ink);margin-right:8%}
.chat .src{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.chat .src span{font-size:.78rem;background:var(--soft);border:1px solid var(--line);border-radius:999px;padding:3px 10px;color:var(--ink2)}
.chat .confirm{display:flex;gap:8px;margin-top:10px}
.chat .confirm b{font-size:.8rem;border-radius:999px;padding:5px 12px;background:var(--brand);color:#fff;font-weight:600}
.chat .confirm i{font-size:.8rem;border-radius:999px;padding:5px 12px;border:1px solid var(--line);font-style:normal;color:var(--ink2)}

/* Grids & cards */
.grid{display:grid;gap:22px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.card p:last-child{margin-bottom:0}
.card p{color:var(--ink2)}
.num{display:inline-flex;width:36px;height:36px;border-radius:50%;background:rgba(25,180,124,.14);color:var(--brand-d);font-weight:700;align-items:center;justify-content:center;margin-bottom:14px}
.head{max-width:46rem;margin-bottom:40px}
ul.check{list-style:none;padding:0;margin:0}
ul.check li{padding-left:30px;position:relative;margin-bottom:.7em;color:var(--ink2)}
ul.check li::before{content:"";position:absolute;left:0;top:.42em;width:16px;height:9px;border-left:3px solid var(--brand);border-bottom:3px solid var(--brand);transform:rotate(-45deg)}
.on-dark ul.check li{color:#b9c6d6}
table.cmp{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;font-size:.97rem}
table.cmp th,table.cmp td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
table.cmp th{background:var(--soft);font-size:.85rem;text-transform:uppercase;letter-spacing:.06em;color:var(--ink2)}
table.cmp tr:last-child td{border-bottom:0}
.tag{display:inline-block;font-size:.75rem;font-weight:700;border-radius:999px;padding:3px 10px;background:#fff4d6;color:#8a6100;margin-left:6px;vertical-align:middle}
details{border:1px solid var(--line);border-radius:12px;padding:16px 20px;background:#fff;margin-bottom:12px}
summary{font-weight:650;cursor:pointer}
details p{margin:.8em 0 0;color:var(--ink2)}
.cta{text-align:center}
.cta .lead{margin-left:auto;margin-right:auto}
.cta .btn-row{justify-content:center}

/* Footer */
footer{background:var(--dark);color:#b9c6d6;padding:56px 0 28px;font-size:.95rem}
footer a{color:#fff;text-decoration:none}
footer a:hover{text-decoration:underline}
.foot{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px}
footer h3{color:#fff;font-size:1rem}
footer ul{list-style:none;padding:0;margin:0}
footer li{margin-bottom:.4em}
.copy{border-top:1px solid #22364d;margin-top:36px;padding-top:20px;font-size:.85rem}

@media(max-width:980px){
  section{padding:60px 0}
  .hero-grid,.g3,.g2,.foot{grid-template-columns:1fr}
  .nav-btn{display:block}
  nav ul{display:none;position:absolute;left:0;right:0;top:68px;background:#fff;flex-direction:column;align-items:flex-start;padding:18px 24px;border-bottom:1px solid var(--line);gap:16px}
  .nav-toggle:checked ~ ul{display:flex}
  table.cmp{font-size:.9rem}
}

.demo-wrap{position:relative;max-width:960px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:0 20px 50px rgba(14,27,42,.15);background:#0b1624}
video.demo{display:block;width:100%;aspect-ratio:16/9;background:#0b1624}
.demo-badge{position:absolute;top:14px;right:14px;z-index:2;display:flex;align-items:center;gap:8px;background:rgba(11,22,36,.88);color:#fff;font-size:.82rem;font-weight:600;padding:6px 12px;border-radius:999px;pointer-events:none}
.demo-badge b{width:9px;height:9px;border-radius:50%;background:#8a97a8}
.demo-badge.live b{background:#ff4d4f;animation:pulse 1.4s infinite}
.demo-time{font-weight:500;color:#b9c6d6;font-variant-numeric:tabular-nums}
.demo-bar{height:8px;background:#22364d;cursor:pointer}
.demo-bar i{display:block;height:100%;width:0;background:var(--brand);transition:width .25s linear}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(255,77,79,.6)}100%{box-shadow:0 0 0 9px rgba(255,77,79,0)}}
.person{display:flex;gap:20px;align-items:flex-start}
.person img,.person .avatar{flex:0 0 160px;width:160px;height:160px;border-radius:50%;object-fit:cover}
.person .avatar{display:flex;align-items:center;justify-content:center;background:rgba(25,180,124,.14);color:var(--brand-d);font-weight:700;font-size:2.1rem}
@media(max-width:520px){.person{flex-direction:column}}
.project{display:flex;gap:22px;align-items:flex-start}
.project>div{flex:1}
.project img{flex:0 0 165px;width:165px;height:auto;border-radius:18px;border:1px solid var(--line);box-shadow:0 12px 30px rgba(14,27,42,.15)}
.on-dark a:not(.btn){color:#7fe3bd}
@media(max-width:520px){.project{flex-direction:column}.project img{align-self:center}}