:root {
  --bg: #f6f8f7; --surface: #fff; --surface-2: #eef3f1; --line: #dde5e2;
  --ink: #12201c; --ink-2: #44544f; --ink-3: #7a8984;
  --accent: #0d7a6b; --accent-ink: #fff; --accent-soft: #dff1ec; --accent-2: #0a5c51;
  --radius: 16px; --shadow: 0 1px 2px rgb(0 0 0 / .04), 0 8px 30px rgb(13 60 52 / .07);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1312; --surface: #151e1d; --surface-2: #1b2726; --line: #283533;
    --ink: #e8efed; --ink-2: #aab8b4; --ink-3: #7b8a86;
    --accent: #2bb39d; --accent-ink: #052019; --accent-soft: #123631; --accent-2: #5fd0bd;
    --shadow: 0 1px 2px rgb(0 0 0 / .3), 0 8px 30px rgb(0 0 0 / .25);
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); text-decoration: none; }
h1, h2, h3 { line-height: 1.2; margin: 0; letter-spacing: -.01em; }
h2 { font-size: clamp(26px, 3.4vw, 36px); margin-bottom: 10px; }
h3 { font-size: 18px; margin-bottom: 6px; }
p { margin: 0; }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 780px; }
.small { font-size: 13px; }
.muted { color: var(--ink-3); }
.sub { color: var(--ink-2); max-width: 680px; margin-bottom: 28px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px; }
.grid { display: grid; gap: 16px; }
.three { grid-template-columns: repeat(3, 1fr); }
.ic { font-size: 28px; display: block; margin-bottom: 10px; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; font: inherit; font-weight: 600; font-size: 15px;
  padding: 10px 18px; border-radius: 11px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); cursor: pointer; white-space: nowrap; }
.btn:hover { border-color: var(--ink-3); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { background: var(--accent-2); border-color: var(--accent-2); }
.btn.ghost { background: transparent; }
.btn.big { padding: 14px 24px; font-size: 16px; }
.btn:disabled { opacity: .6; cursor: default; }

/* Шапка */
.top { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 85%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.top-in { display: flex; align-items: center; gap: 24px; height: 64px; }
.logo { font-weight: 800; font-size: 18px; color: var(--ink); display: flex; align-items: center; gap: 8px; white-space: nowrap; }
.logo-mark { width: 30px; height: 30px; display: block; flex: none; }
.menu { display: flex; gap: 22px; flex: 1; }
.menu a { color: var(--ink-2); font-size: 15px; }
.menu a:hover { color: var(--ink); }
.top-cta { display: flex; gap: 8px; align-items: center; }
.burger { display: none; font-size: 22px; background: none; border: 0; color: var(--ink); cursor: pointer; padding: 4px 8px; }

/* Первый экран */
.hero { padding: 56px 0 48px; background: radial-gradient(1000px 420px at 85% 0%, var(--accent-soft), transparent 70%); }
.hero-in { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.badge { display: inline-block; background: var(--accent-soft); color: var(--accent); font-weight: 600; font-size: 13px; padding: 5px 12px; border-radius: 99px; margin-bottom: 18px; }
h1 { font-size: clamp(32px, 4.6vw, 52px); margin-bottom: 18px; }
h1 em { font-style: normal; color: var(--accent); }
.lead { font-size: 18px; color: var(--ink-2); margin-bottom: 20px; max-width: 600px; }
.ticks { list-style: none; padding: 0; margin: 0 0 28px; display: grid; gap: 8px; }
.ticks li { padding-left: 30px; position: relative; }
.ticks li::before { content: "✓"; position: absolute; left: 0; top: 0; width: 20px; height: 20px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-size: 12px; font-weight: 700; display: grid; place-items: center; }
.hero-btns { display: flex; gap: 12px; flex-wrap: wrap; }

/* Демо-чат */
.demo { display: flex; flex-direction: column; gap: 8px; padding: 18px; }
.demo-head { display: flex; align-items: center; gap: 12px; margin-bottom: 4px; }
.avatar { width: 44px; height: 44px; border-radius: 50%; background: var(--accent-soft); display: grid; place-items: center; font-size: 22px; flex: none; }
.demo select, .lead-form input { font: inherit; font-size: 15px; width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); color: var(--ink); }
.demo-msgs { height: 300px; overflow-y: auto; display: flex; flex-direction: column; gap: 8px; background: var(--surface-2); border-radius: 12px; padding: 12px; margin-top: 6px; }
.m { max-width: 85%; padding: 8px 12px; border-radius: 14px; font-size: 15px; white-space: pre-wrap; word-wrap: break-word; }
.m.client { align-self: flex-end; background: var(--accent); color: var(--accent-ink); border-bottom-right-radius: 4px; }
.m.agent { align-self: flex-start; background: var(--surface); border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.m.typing { color: var(--ink-3); font-style: italic; }
.demo-status { min-height: 20px; color: var(--ink-3); }
.pill { display: inline-block; padding: 1px 8px; border-radius: 99px; background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.demo-send { display: flex; gap: 8px; }
.demo-send input { flex: 1; font: inherit; font-size: 15px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); color: var(--ink); min-width: 0; }
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.hints { display: flex; flex-wrap: wrap; gap: 6px; }
.hints button { font: inherit; font-size: 13px; border: 1px solid var(--line); background: var(--surface); color: var(--ink-2); padding: 5px 10px; border-radius: 99px; cursor: pointer; }
.hints button:hover { border-color: var(--accent); color: var(--accent); }

.strip { border-block: 1px solid var(--line); background: var(--surface); }
.strip-in { display: grid; grid-template-columns: repeat(4, 1fr); padding: 22px 20px; text-align: center; }
.strip b { display: block; font-size: 28px; color: var(--accent); }
.strip span { color: var(--ink-2); font-size: 14px; }

.sec { padding: 80px 0; }
.sec.alt { background: var(--surface-2); }
.pain p, .feat p { color: var(--ink-2); font-size: 15px; }
.solution { display: flex; gap: 16px; align-items: flex-start; margin-top: 16px; border-color: var(--accent); background: var(--accent-soft); }
.solution .ic { margin: 0; }
.solution p { color: var(--ink-2); }

/* Каталог */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.chip { font: inherit; font-size: 14px; border: 1px solid var(--line); background: var(--surface); color: var(--ink-2); padding: 7px 14px; border-radius: 99px; cursor: pointer; }
.chip.on { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.tpls { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }
.tpl { display: flex; flex-direction: column; gap: 6px; padding: 18px; }
.tpl .ic { margin: 0; }
.tpl .g { font-size: 11px; color: var(--ink-3); text-transform: uppercase; letter-spacing: .05em; }
.tpl p { color: var(--ink-2); font-size: 14px; flex: 1; }
.tpl button { margin-top: 6px; align-self: flex-start; }

.steps { list-style: none; padding: 0; margin: 28px 0 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; counter-reset: s; }
.steps li { counter-increment: s; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; display: grid; gap: 6px; align-content: start; }
.steps li::before { content: counter(s); width: 34px; height: 34px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); font-weight: 700; display: grid; place-items: center; margin-bottom: 6px; }
.steps span { color: var(--ink-2); font-size: 15px; }

.channels { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.ch { display: flex; flex-direction: column; align-items: center; gap: 6px; text-align: center; padding: 20px 12px; }
.ch .ic { margin: 0; }
.tag { font-size: 12px; padding: 2px 10px; border-radius: 99px; background: var(--surface-2); color: var(--ink-3); }
.tag.ok { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

.prices { align-items: stretch; }
.price { display: flex; flex-direction: column; gap: 10px; position: relative; }
.price .p { font-size: 32px; font-weight: 800; }
.price .p span { font-size: 15px; font-weight: 400; color: var(--ink-3); }
.price ul { list-style: none; padding: 0; margin: 4px 0 12px; display: grid; gap: 8px; flex: 1; color: var(--ink-2); }
.price li::before { content: "✓  "; color: var(--accent); font-weight: 700; }
.price.hot { border: 2px solid var(--accent); }
.pop { position: absolute; top: -12px; left: 22px; background: var(--accent); color: var(--accent-ink); font-size: 12px; font-weight: 700; padding: 3px 10px; border-radius: 99px; }

details { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 16px 20px; margin-bottom: 10px; }
summary { cursor: pointer; font-weight: 600; font-size: 17px; }
details p { margin-top: 10px; color: var(--ink-2); }

.cta { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: var(--accent-ink); }
.cta-in { display: grid; grid-template-columns: 1fr 420px; gap: 48px; align-items: center; }
.cta h2 { color: var(--accent-ink); }
.cta p { opacity: .9; font-size: 18px; }
.lead-form { color: var(--ink); display: grid; gap: 4px; }
.lead-form label { font-size: 13px; font-weight: 600; color: var(--ink-2); margin-top: 8px; }
.lead-form button { margin-top: 14px; }
.lead-form p { opacity: 1; font-size: 13px; }

.foot { padding: 28px 0; border-top: 1px solid var(--line); }
.foot-in { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }

@media (max-width: 960px) {
  .hero-in, .cta-in { grid-template-columns: 1fr; gap: 32px; }
  .three, .steps { grid-template-columns: 1fr 1fr; }
  .channels { grid-template-columns: repeat(3, 1fr); }
  .menu { display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--surface); border-bottom: 1px solid var(--line); padding: 8px 20px; }
  .menu.open { display: flex; }
  .menu a { padding: 10px 0; }
  .top-in { justify-content: space-between; }
  .burger { display: block; }
}
@media (max-width: 600px) {
  .three, .steps { grid-template-columns: 1fr; }
  .strip-in { grid-template-columns: 1fr 1fr; gap: 14px; }
  .channels { grid-template-columns: 1fr 1fr; }
  .sec { padding: 56px 0; }
  .top-cta .btn.ghost { display: none; }
  .hero { padding-top: 32px; }
  .demo-msgs { height: 260px; }
}