:root{
  --bg:#ffffff;--bg2:#f5f7fa;--card:#ffffff;--line:#e3e7ee;
  --text:#1a1d24;--muted:#5e6878;
  --ink-blue:#1a76cc;--ink-green:#4b7d12;--ink-red:#c9372f;--accent:#349efa;--accent2:#7cb82f;--warn:#f0635b;--purple:#8e64f0;--red:#f0635b;
  --radius:18px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:1140px;margin:0 auto;padding:0 20px}
header{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.88);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{font-weight:800;font-size:20px;letter-spacing:-.02em}
.logo b{color:var(--ink-blue)}
nav{display:flex;gap:24px;color:var(--muted);font-size:15px}
nav a:hover{color:var(--text)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 24px;border-radius:12px;font-weight:600;font-size:16px;border:0;cursor:pointer;transition:transform .15s,box-shadow .15s,background .15s}
.btn-primary{background:var(--ink-blue);color:#fff;box-shadow:0 8px 30px rgba(52,158,250,.35)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 12px 36px rgba(52,158,250,.5)}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--muted)}
.btn-sm{padding:10px 18px;font-size:14px}

.hero{padding:88px 0 72px;position:relative;overflow:hidden}
.hero:before{content:"";position:absolute;inset:-200px -100px auto auto;width:700px;height:700px;background:radial-gradient(circle,rgba(52,158,250,.22),transparent 60%);pointer-events:none}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.badge{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:99px;background:rgba(151,197,57,.1);color:var(--ink-green);font-size:14px;font-weight:600;margin-bottom:20px}
.badge:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--accent2);box-shadow:0 0 10px var(--accent2)}
h1{font-size:clamp(34px,5vw,58px);line-height:1.08;letter-spacing:-.03em;font-weight:800;margin-bottom:20px}
h1 em{font-style:normal;background:linear-gradient(90deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:clamp(17px,2vw,20px);color:var(--muted);margin-bottom:32px;max-width:560px}
.cta-row{display:flex;gap:12px;flex-wrap:wrap}
.trust{margin-top:28px;color:var(--muted);font-size:14px;display:flex;gap:20px;flex-wrap:wrap}
.trust span:before{content:"✓ ";color:var(--ink-green)}

/* chat mock */
.chat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:0 24px 60px rgba(20,40,80,.12)}
.chat-head{display:flex;align-items:center;gap:12px;padding-bottom:14px;border-bottom:1px solid var(--line);margin-bottom:16px}
.ava{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent2));display:grid;place-items:center;font-weight:700;color:#fff}
.chat-head small{display:block;color:var(--ink-green);font-size:12px}
.msg{max-width:85%;padding:10px 14px;border-radius:14px;margin-bottom:10px;font-size:15px;opacity:0;transform:translateY(6px);animation:pop .4s forwards}
.msg.in{background:var(--bg2);border:1px solid var(--line);border-bottom-left-radius:4px}
.msg.out{background:var(--ink-blue);color:#fff;margin-left:auto;border-bottom-right-radius:4px}
.msg:nth-child(2){animation-delay:.3s}.msg:nth-child(3){animation-delay:1.1s}.msg:nth-child(4){animation-delay:1.9s}.msg:nth-child(5){animation-delay:2.7s}.msg:nth-child(6){animation-delay:3.5s}
.msg .t{display:block;font-size:11px;opacity:.6;margin-top:2px}
@keyframes pop{to{opacity:1;transform:none}}

section{padding:80px 0}
.sec-alt{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
h2{font-size:clamp(28px,3.6vw,42px);letter-spacing:-.02em;line-height:1.15;margin-bottom:14px}
.sub{color:var(--muted);font-size:18px;max-width:640px;margin-bottom:44px}
.center{text-align:center}.center .sub{margin-left:auto;margin-right:auto}

.grid{display:grid;gap:20px}
.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}.g2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.card .ic{font-size:28px;margin-bottom:14px}
.card h3{font-size:19px;margin-bottom:8px}
.card p{color:var(--muted);font-size:15px}

.stat{text-align:center}
.stat b{display:block;font-size:44px;font-weight:800;letter-spacing:-.03em;background:linear-gradient(90deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{color:var(--muted);font-size:15px}

.steps{counter-reset:s}
.step{position:relative;padding-left:64px}
.step:before{counter-increment:s;content:counter(s);position:absolute;left:0;top:0;width:44px;height:44px;border-radius:12px;background:rgba(52,158,250,.15);color:var(--ink-blue);display:grid;place-items:center;font-weight:800;font-size:18px}
.step h3{margin-bottom:6px;font-size:19px}
.step p{color:var(--muted)}

.compare{width:100%;border-collapse:collapse;background:var(--card);border-radius:var(--radius);overflow:hidden;border:1px solid var(--line)}
.compare th,.compare td{padding:16px 20px;text-align:left;border-bottom:1px solid var(--line);font-size:15px}
.compare th{background:var(--bg2);color:var(--muted);font-weight:600}
.compare td:last-child{color:var(--ink-green);font-weight:600}
.compare{min-width:640px}
.compare tr:last-child td{border-bottom:0}

.price{display:flex;flex-direction:column}
.price.hot{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent),0 20px 60px rgba(52,158,250,.2);position:relative}
.price.hot:after{content:"Популярный";color:#fff;position:absolute;top:-12px;right:20px;background:var(--accent);padding:3px 12px;border-radius:99px;font-size:12px;font-weight:700}
.price .amt{font-size:40px;font-weight:800;letter-spacing:-.02em;margin:10px 0 4px}
.price .amt small{font-size:16px;color:var(--muted);font-weight:500}
.price ul{list-style:none;margin:18px 0 26px;flex:1}
.price li{padding:6px 0;color:var(--muted);font-size:15px}
.price li:before{content:"✓  ";color:var(--ink-green);font-weight:700}

details{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 22px;margin-bottom:12px}
summary{cursor:pointer;font-weight:600;font-size:17px;list-style:none;display:flex;justify-content:space-between;gap:12px}
summary::-webkit-details-marker{display:none}
summary:after{content:"+";color:var(--ink-blue);font-size:22px;line-height:1}
details[open] summary:after{content:"–"}
details p{color:var(--muted);margin-top:10px}

.form-box{background:linear-gradient(135deg,rgba(52,158,250,.14),rgba(151,197,57,.08));border:1px solid var(--line);border-radius:24px;padding:48px;display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
form{display:grid;gap:12px}
input,select,textarea{width:100%;padding:14px 16px;border-radius:12px;border:1px solid var(--line);background:var(--bg);color:var(--text);font:inherit;font-size:16px}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent)}
.form-note{font-size:13px;color:var(--muted)}
.form-ok{display:none;padding:16px;border-radius:12px;background:rgba(151,197,57,.12);color:var(--ink-green);font-weight:600}
.hp{position:absolute;left:-9999px}

footer{padding:40px 0;color:var(--muted);font-size:14px;border-top:1px solid var(--line)}
footer .wrap{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}

@media (max-width:900px){
  nav{display:none}
  .hero{padding:56px 0 48px}
  .hero-grid,.form-box{grid-template-columns:1fr}
  .g3,.g4{grid-template-columns:1fr 1fr}
  .form-box{padding:28px}
  section{padding:60px 0}
}
@media (max-width:600px){
  .g3,.g4,.g2{grid-template-columns:1fr}
  .compare th,.compare td{padding:12px;font-size:14px}
  header .btn{display:none}
}

/* lost-leads calculator */
.calc{display:grid;gap:14px}
.calc label{display:grid;gap:6px;font-size:14px;color:var(--muted)}
.calc-out{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px;color:var(--muted)}
.calc-out>b{display:block;font-size:clamp(34px,5vw,48px);font-weight:800;letter-spacing:-.02em;color:var(--warn);margin:4px 0}
.calc-out span b{color:var(--text)}

/* mascot */
.chat-wrap{position:relative;padding-top:120px}
.chat-wrap .chat{position:relative;z-index:1}
.mascot{position:absolute;top:0;right:12px;width:180px;height:auto;z-index:2;filter:drop-shadow(0 14px 24px rgba(20,40,80,.18));pointer-events:none}
.mascot-sm{display:block;width:110px;height:auto;margin-bottom:12px;filter:drop-shadow(0 8px 16px rgba(20,40,80,.16))}
@media (max-width:600px){
  .chat-wrap{padding-top:96px}
  .mascot{width:140px;right:0}
  .mascot-sm{width:84px}
}

/* "works with" strip */
.works{padding:28px 0;border-top:1px solid var(--line)}
.works .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:10px}
.works-label{color:var(--muted);font-size:14px;margin-right:6px}
.chip{padding:8px 16px;border-radius:99px;border:1px solid var(--line);background:var(--card);font-weight:600;font-size:15px;color:var(--text)}
.chip-logo{background:#fff;border-color:var(--line);padding:7px 16px;display:inline-flex;align-items:center}
.chip-logo img{display:block;height:22px;width:auto}
.chip-yagpt{background:linear-gradient(90deg,#ddd6ea,#f3f1f8);border-color:transparent}
.chip-yagpt img{height:18px}
.chip-icon{display:inline-flex;align-items:center;gap:8px}
.chip-icon img{display:block;width:22px;height:22px}

/* step illustrations */
.step-img{display:block;width:100%;max-width:200px;height:auto;margin:0 0 14px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:10px}
.form-ok .mascot-sm{margin:0 auto 10px}
.form-ok{text-align:center}

/* Avito-palette accents: step numbers cycle through the four logo colours */
.steps .step:nth-child(4n+2):before{background:rgba(240,99,91,.15);color:var(--ink-red)}
.steps .step:nth-child(4n+3):before{background:rgba(142,100,240,.15);color:var(--purple)}
.steps .step:nth-child(4n+4):before{background:rgba(151,197,57,.18);color:var(--ink-green)}
.badge{background:rgba(151,197,57,.12)}
.price.hot:after{background:var(--purple)}

.disclaimer{margin-top:16px;font-size:12px;color:var(--muted);opacity:.85}