:root{
  --paper:#E8E7E4;
  --paper-2:#F3F2F0;
  --ink:#111113;
  --ink-2:#3A3A3E;
  --mute:#8A8A90;
  --line:#D2D1CD;
  --ember:#FF5A36;
  --ember-deep:#C63C1C;

  --helv:'Helvetica Neue','Helvetica','Arial',system-ui,sans-serif;
  --display:var(--helv);
  --body:var(--helv);
  --mono:var(--helv);

  --pad:clamp(20px,4vw,56px);
  --radius:26px;

  --d-bg:#1D1E21;
  --d-line:#2E2F34;
  --d-tx:#B9B9BE;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:20px}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--body);font-size:17px;line-height:1.55;
  -webkit-font-smoothing:antialiased;
}

/* фактура мятой бумаги */
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:url("data:image/svg+xml;utf8,\
<svg xmlns='http://www.w3.org/2000/svg' width='420' height='420'>\
<filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.7' numOctaves='4'/>\
<feColorMatrix type='saturate' values='0'/></filter>\
<rect width='420' height='420' filter='url(%23n)' opacity='0.5'/></svg>");
  opacity:.20;mix-blend-mode:multiply;
}
body::after{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    linear-gradient(115deg,rgba(0,0,0,.05) 0 1px,transparent 1px 46%,rgba(255,255,255,.5) 46% 47%,transparent 47%),
    linear-gradient(200deg,rgba(0,0,0,.04) 0 1px,transparent 1px 62%,rgba(255,255,255,.45) 62% 63%,transparent 63%),
    radial-gradient(120% 90% at 20% 0%,rgba(255,255,255,.7),transparent 60%);
  opacity:.7;
}

.skip{position:absolute;left:-9999px}
.skip:focus{left:16px;top:16px;z-index:99;background:var(--ember);color:#fff;padding:10px 16px;border-radius:8px}

.shell{position:relative;z-index:1;display:grid;grid-template-columns:minmax(340px,38%) 1fr;gap:clamp(24px,3vw,48px);padding:var(--pad);max-width:1560px;margin:0 auto}

/* ---------- ЛЕВАЯ ПАНЕЛЬ ---------- */
/* левая колонка стоит на месте, прокручивается правая лента.
   если рельс помещается в экран — закреплён сверху и не двигается вообще.
   если окно ниже рельса — скрипт ставит отрицательный top, и рельс один раз
   проезжает вверх до своего низа, дальше стоит: видны все разделы. */
.rail{
  position:sticky;top:var(--pad);align-self:start;
  display:flex;flex-direction:column;gap:clamp(18px,2.4vh,32px);
  padding-right:clamp(0px,1.5vw,24px);
}
.brand{display:flex;align-items:center;gap:12px;font-family:var(--mono);font-weight:700;font-size:12px;letter-spacing:.17em;text-transform:uppercase;color:var(--ink-2)}
.mark{width:34px;height:34px;border-radius:50%;border:1.5px solid var(--ink);position:relative;display:grid;place-items:center;flex:none}
.mark i{width:12px;height:12px;border-radius:50%;background:var(--ember);display:block;transform:translateX(3px)}

h1{font-family:var(--display);font-weight:700;font-size:clamp(31px,4.1vw,66px);line-height:1;letter-spacing:-.035em;margin:0 0 20px}
/* СИГНАТУРА: инерционный шлейф */
.trail{position:relative;display:inline-block;color:var(--ember)}
.trail::before,.trail::after{content:attr(data-t);position:absolute;left:0;top:0;color:var(--ember);white-space:nowrap}
.trail::before{opacity:.3;transform:translateX(-.1em)}
.trail::after{opacity:.14;transform:translateX(-.2em)}
.lede{font-size:clamp(15px,1.15vw,18px);color:var(--ink-2);max-width:36ch;margin:0}

.rail-nav{list-style:none;margin:34px 0 0;padding:0;display:grid;grid-template-columns:1fr 1fr;column-gap:20px;row-gap:10px}
.rail-nav a{
  position:relative;display:inline-block;padding-bottom:4px;
  color:var(--mute);text-decoration:none;font-weight:500;
  transition:color .18s;
}
/* линия растёт из левого края — активный пункт держит её всегда */
.rail-nav a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--ember);border-radius:2px;
  transition:width .24s ease;
}
.rail-nav a:hover,.rail-nav a:focus-visible{color:var(--ink)}
.rail-nav a:hover::after,.rail-nav a:focus-visible::after{width:100%}
.rail-nav a.on{color:var(--ink);font-weight:700}
.rail-nav a.on::after{width:100%}

.cta{display:inline-flex;align-items:center;gap:18px;background:var(--ember);color:#fff;border:none;border-radius:999px;padding:8px 8px 8px 30px;font-family:var(--body);font-size:17px;font-weight:600;cursor:pointer;text-decoration:none;transition:background .2s}
.cta:hover{background:var(--ember-deep)}
.cta .dot{width:52px;height:52px;border-radius:50%;background:#fff;color:var(--ember-deep);display:grid;place-items:center;font-size:20px;transition:transform .25s;flex:none}
.cta:hover .dot{transform:rotate(45deg)}
.cta--sm{font-size:15px;padding:6px 6px 6px 22px;gap:12px}
.cta--sm .dot{width:38px;height:38px;font-size:16px}
.cta--full{width:100%;justify-content:space-between;margin-top:6px}
.cta[disabled]{opacity:.6;cursor:default}

.rail-foot{display:flex;flex-direction:column;gap:20px;align-items:flex-start;margin-top:26px}
.tiny{font-family:var(--mono);font-weight:600;font-size:11px;letter-spacing:.13em;text-transform:uppercase;color:var(--mute);margin:0}

/* ---------- ПРАВАЯ КОЛОНКА ---------- */
.feed{display:flex;flex-direction:column;gap:clamp(16px,1.6vw,26px);min-width:0}
.card{background:rgba(255,255,255,.55);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(24px,2.4vw,42px);backdrop-filter:blur(2px)}
.card.dark{background:var(--ink);border-color:var(--ink);color:#EDEDEF}
.card.dark .eyebrow{color:var(--ember)}
.card.dark h2,.card.dark h3{color:#fff}
.card.dark p{color:var(--d-tx)}


.eyebrow{font-family:var(--mono);font-weight:700;font-size:11px;letter-spacing:.19em;text-transform:uppercase;color:var(--ember-deep);margin:0 0 14px}
h2{font-family:var(--body);font-weight:700;font-size:clamp(27px,2.7vw,42px);line-height:1.05;letter-spacing:-.028em;margin:0 0 14px}
h3{font-family:var(--body);font-weight:700;font-size:19px;letter-spacing:-.012em;margin:0 0 6px;line-height:1.25}
p{margin:0;color:var(--ink-2)}
.p-max{max-width:56ch}

/* карточка с инерционным мотивом */
.idea{display:grid;grid-template-columns:1fr minmax(220px,290px);gap:clamp(20px,2.4vw,44px);align-items:center}
.rings{width:100%;aspect-ratio:1;position:relative}
.rings i{position:absolute;border-radius:50%;border:1px solid var(--line);inset:0}
.rings i:nth-child(2){inset:16%}
.rings i:nth-child(3){inset:32%;border-color:#BFBEB9}
.rings .core{position:absolute;inset:44%;border:none;background:var(--ember);animation:drift 9s ease-in-out infinite}
@keyframes drift{0%,100%{transform:translate(0,0)}50%{transform:translate(14%,-10%)}}

/* три горизонта */
.horizons{display:flex;flex-direction:column;gap:0;margin-top:8px}
.horizon{display:grid;grid-template-columns:130px 1fr;gap:20px;padding:16px 0;border-top:1px solid var(--line);align-items:baseline}
.horizon:first-child{border-top:none}
.horizon b{font-weight:700}
.horizon p{font-size:15px}

/* сетки и плитки */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(14px,1.4vw,22px)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(14px,1.4vw,22px)}
.tile{background:var(--paper-2);border:1px solid var(--line);border-radius:18px;padding:22px;transition:transform .2s,border-color .2s}
.tile:hover{transform:translateY(-3px);border-color:var(--ink)}
.card.dark .tile{background:var(--d-bg);border-color:var(--d-line)}
.tile p{font-size:14.5px;color:var(--mute)}
.tile .ic{width:36px;height:36px;border-radius:50%;background:var(--ember);box-shadow:0 0 0 4px rgba(255,90,54,.14);display:grid;place-items:center;margin-bottom:14px;color:#fff;font-size:16px;font-weight:700}

/* компетенции */
.stack{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.pill{border:1px solid var(--line);background:var(--paper-2);border-radius:999px;padding:10px 18px;font-size:15px;font-weight:500;transition:background .18s,color .18s,border-color .18s}
.pill:hover{background:var(--ink);color:#fff;border-color:var(--ink)}

/* акция */
.promo{display:grid;grid-template-columns:1fr minmax(220px,300px);gap:clamp(24px,3vw,48px);align-items:center}
.promo h2{font-family:var(--display);font-size:clamp(30px,3.2vw,46px);letter-spacing:-.035em;line-height:1.03}
.promo .cta-row{margin-top:28px}
.promo__price{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;
  padding:30px 22px;border-radius:20px;
  background:linear-gradient(160deg,rgba(255,90,54,.18),rgba(255,90,54,.06));
  border:1px solid rgba(255,90,54,.4);
}
.promo__old{
  font-family:var(--mono);font-size:13px;letter-spacing:.06em;color:#8A8A90;
  text-decoration:line-through;text-decoration-color:var(--ember);
}
.promo__price b{
  font-family:var(--display);font-weight:700;font-size:clamp(44px,4.4vw,64px);
  line-height:1;letter-spacing:-.045em;color:#fff;
}
.promo__note{
  font-family:var(--mono);font-weight:600;font-size:11px;letter-spacing:.13em;
  text-transform:uppercase;color:var(--ember);
}

/* цифровые сотрудники */
.crew{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(14px,1.4vw,22px);margin-top:26px}
.mate{
  background:var(--paper-2);border:1px solid var(--line);border-radius:18px;padding:26px 22px;
  display:flex;flex-direction:column;transition:transform .2s,border-color .2s;
}
.mate:hover{transform:translateY(-3px);border-color:var(--ink)}
/* аватар — 3D-персонаж на круглой подложке, ember-точка = «на смене» */
.mate__ava{
  width:88px;height:88px;border-radius:50%;
  background:radial-gradient(circle at 50% 38%,#fff,var(--paper-2) 72%);
  border:1px solid var(--line);
  position:relative;display:grid;place-items:center;margin-bottom:18px;flex:none;
}
.mate__ava img{
  width:78px;height:78px;object-fit:contain;display:block;
  filter:drop-shadow(0 6px 10px rgba(0,0,0,.14));
}
.mate__ava i{
  position:absolute;top:6px;right:6px;width:12px;height:12px;border-radius:50%;
  background:var(--ember);display:block;box-shadow:0 0 0 3px var(--paper-2);
}
.mate__role{
  font-family:var(--mono);font-weight:700;font-size:11px;letter-spacing:.19em;
  text-transform:uppercase;color:var(--ember-deep);margin-bottom:6px;
}
.mate h3{font-size:24px;margin-bottom:10px}
.mate__lead{font-size:14.5px;color:var(--mute)}
.mate .ticks{margin:16px 0 0}
.mate .ticks li{font-size:14px}
.mate__stack{
  margin-top:18px;padding-top:16px;border-top:1px solid var(--line);
  font-size:13px;color:var(--mute);
}
.mate__demo{
  margin-top:14px;align-self:flex-start;background:none;border:0;padding:0;cursor:pointer;
  font-family:var(--body);font-size:14.5px;font-weight:600;color:var(--ember-deep);
  transition:opacity .18s;
}
.mate__demo:hover{opacity:.7}
.crew__note{margin-top:22px}

/* демонстрация */
.demo-tabs{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.demo-tab{
  display:inline-flex;align-items:center;gap:10px;cursor:pointer;
  border:1px solid var(--line);background:var(--paper-2);border-radius:999px;
  padding:10px 20px;font-family:var(--body);font-size:15px;font-weight:500;color:var(--ink);
  transition:background .18s,color .18s,border-color .18s;
}
.demo-tab i{font-family:var(--mono);font-style:normal;font-weight:700;font-size:11px;letter-spacing:.13em;color:var(--mute);transition:color .18s}
.demo-tab:hover{border-color:var(--ink)}
.demo-tab.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.demo-tab.on i{color:var(--ember)}

.demo-panel[hidden]{display:none}
.demo-stage{
  margin-top:22px;border:1px solid var(--line);border-radius:18px;overflow:hidden;
  background:var(--paper-2);aspect-ratio:16/9;
}
.demo-stage video{display:block;width:100%;height:100%;object-fit:cover}
.demo-cap{margin-top:16px;font-size:14.5px;color:var(--mute);max-width:70ch}
.demo-note{margin-top:18px}

/* симптомы */
.symptoms{margin-top:26px;display:flex;flex-direction:column}
.symptom{display:grid;grid-template-columns:60px 1fr;gap:18px;padding:18px 0;border-top:1px solid var(--line);align-items:start}
.symptom:first-child{border-top:none;padding-top:6px}
.symptom>span{font-family:var(--mono);font-weight:600;font-size:13px;letter-spacing:.08em;color:var(--ember);padding-top:4px}
.symptom p{font-size:15px;color:var(--mute)}

.note{
  margin-top:26px;padding:22px;border-radius:18px;
  background:rgba(255,90,54,.08);border:1px solid rgba(255,90,54,.28);
  display:flex;gap:22px;align-items:center;justify-content:space-between;flex-wrap:wrap;
}
.note p{font-size:15.5px;color:var(--ink-2);max-width:62ch}
.note b{color:var(--ink)}

/* шаги */
.steps{counter-reset:s;display:flex;flex-direction:column;margin-top:26px}
.step{counter-increment:s;display:grid;grid-template-columns:60px 1fr;gap:18px;padding:20px 0;border-top:1px solid var(--d-line)}
.step:first-child{border-top:none;padding-top:6px}
.step::before{content:counter(s,decimal-leading-zero);font-family:var(--mono);font-weight:600;font-size:13px;letter-spacing:.08em;color:var(--ember);padding-top:3px}
.step .meta{display:inline-block;margin-top:10px;font-family:var(--mono);font-size:11px;font-weight:600;letter-spacing:.13em;text-transform:uppercase;color:var(--mute)}

/* цифры */
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:34px}
.stat b{font-family:var(--display);font-weight:700;font-size:clamp(36px,3.6vw,58px);line-height:1;display:block;letter-spacing:-.045em}
.stat span{font-size:14px;color:var(--mute);display:block;margin-top:8px}

/* кейсы */
.cases{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(14px,1.4vw,22px);margin-top:26px}
.case{background:var(--paper-2);border:1px solid var(--line);border-radius:18px;padding:22px;display:flex;flex-direction:column;transition:transform .2s,border-color .2s}
.case:hover{transform:translateY(-3px);border-color:var(--ink)}
.case>p{font-size:14.5px;color:var(--mute)}
.case h3{margin:12px 0 8px}


/* калькулятор */
.calc{margin-top:26px}
.calc-fields{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(16px,2vw,32px)}
.field label{display:block;font-size:14px;color:var(--mute);margin-bottom:12px;min-height:2.6em}
.field output{display:block;margin-top:10px;font-weight:700;font-size:16px}
/* ползунок: полоска 3px рисуется дорожкой, но сам элемент высотой 28px —
   иначе на телефоне в него не попасть пальцем, а жест забирает прокрутка */
input[type=range]{
  -webkit-appearance:none;appearance:none;
  width:100%;height:28px;background:transparent;
  outline:none;cursor:pointer;
  touch-action:none;                 /* драг не должен уходить в скролл страницы */
}
input[type=range]::-webkit-slider-runnable-track{
  height:3px;border-radius:3px;
  background:linear-gradient(90deg,var(--ember) var(--p,30%),var(--line) var(--p,30%));
}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none;width:20px;height:20px;border-radius:50%;
  background:#fff;border:5px solid var(--ember);box-shadow:0 1px 4px rgba(0,0,0,.18);
  margin-top:-8.5px;                 /* центр бегунка по дорожке: (3-20)/2 */
  cursor:grab;
}
input[type=range]:active::-webkit-slider-thumb{cursor:grabbing}
input[type=range]::-moz-range-track{
  height:3px;border-radius:3px;
  background:linear-gradient(90deg,var(--ember) var(--p,30%),var(--line) var(--p,30%));
}
input[type=range]::-moz-range-thumb{
  width:12px;height:12px;border-radius:50%;
  background:#fff;border:5px solid var(--ember);
}

.calc-res{
  display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(16px,2vw,32px);
  border-top:1px solid var(--line);padding-top:22px;margin-top:28px;
}
.calc-row{display:flex;flex-direction:column;gap:6px}
.calc-row span{font-size:14px;color:var(--mute)}
.calc-row b{font-size:22px;font-weight:700;letter-spacing:-.03em;white-space:nowrap}
.calc-row--main b{font-family:var(--display);font-size:clamp(26px,2.4vw,34px);letter-spacing:-.04em;color:var(--ember-deep)}

.calc-foot{display:flex;gap:22px;align-items:center;justify-content:space-between;flex-wrap:wrap;margin-top:26px}
.calc-foot .tiny{max-width:46ch}

/* форматы */
.plans .plan{display:flex;flex-direction:column;position:relative}
.plan .price{font-family:var(--display);font-weight:700;font-size:30px;letter-spacing:-.04em;color:var(--ink);margin:4px 0 4px}
.plan .price small{font-size:15px;font-weight:500;letter-spacing:0;color:var(--mute)}
.plan--hot{border-color:var(--ember);background:rgba(255,90,54,.06)}
.plan--hot:hover{border-color:var(--ember-deep)}
.badge{position:absolute;top:-11px;left:22px;background:var(--ember);color:#fff;font-family:var(--mono);font-size:10px;font-weight:700;letter-spacing:.13em;text-transform:uppercase;padding:5px 12px;border-radius:999px}
.ticks{list-style:none;margin:18px 0 0;padding:0;display:flex;flex-direction:column;gap:9px;flex:1}
.ticks li{position:relative;padding-left:24px;font-size:14.5px;color:var(--ink-2)}
.ticks li::before{content:"";position:absolute;left:2px;top:7px;width:11px;height:6px;border-left:1.8px solid var(--ember);border-bottom:1.8px solid var(--ember);transform:rotate(-45deg)}
.ticks--dark li{color:#D6D6DA;font-size:16px}
.plan-foot{margin-top:18px;font-size:12.5px;color:var(--mute)}

/* подзаголовок внутри карточки */
.sub{font-size:22px;margin:38px 0 12px;letter-spacing:-.02em}
.card .sub + .p-max{margin-bottom:16px}

/* аккордеон */
.acc{margin-top:26px;border-top:1px solid var(--line)}
.acc-item{border-bottom:1px solid var(--line)}
.acc-q{
  width:100%;background:none;border:0;text-align:left;cursor:pointer;color:var(--ink);
  font-family:var(--body);font-size:18px;font-weight:700;letter-spacing:-.014em;
  padding:20px 44px 20px 0;position:relative;transition:color .18s;
}
.acc-q:hover{color:var(--ember-deep)}
.acc-ic{position:absolute;right:6px;top:50%;transform:translateY(-50%);width:14px;height:14px}
.acc-ic::before,.acc-ic::after{content:"";position:absolute;background:var(--ember);border-radius:2px;transition:transform .3s,opacity .3s}
.acc-ic::before{left:0;top:6px;width:14px;height:2px}
.acc-ic::after{left:6px;top:0;width:2px;height:14px}
.acc-q[aria-expanded="true"] .acc-ic::after{transform:rotate(90deg);opacity:0}
.acc-a{max-height:0;overflow:hidden;transition:max-height .38s ease}
.acc-a p{padding:0 40px 22px 0;font-size:15.5px;color:var(--ink-2)}

/* финальная карточка и форма */
.final h2{font-family:var(--display);font-weight:700;font-size:clamp(28px,3vw,46px);line-height:1.03;letter-spacing:-.032em}
.cta-row{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-top:26px}
.cta.ghost{background:transparent;color:#fff;border:1px solid #4A4B50;padding-right:30px}
.cta.ghost:hover{background:#26272B}

/* нижний док на мобильных */
.dock{display:none}

.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.reveal.on{opacity:1;transform:none}
:focus-visible{outline:2px solid var(--ember);outline-offset:3px;border-radius:4px}

/* ---------- АДАПТИВ ---------- */
@media (max-width:1180px){
  .grid-3,.cases,.crew{grid-template-columns:repeat(2,1fr)}
  .field label{min-height:0}
}
@media (max-width:1000px){
  .shell{grid-template-columns:1fr;gap:26px;padding-bottom:calc(var(--pad) + 84px)}
  .rail{position:static;gap:22px;top:auto!important}
  .rail-nav{display:flex;flex-direction:row;flex-wrap:wrap;gap:16px;margin-top:20px}
  .rail-foot .cta{display:inline-flex}
  .idea,.promo{grid-template-columns:1fr}
  .rings{max-width:240px;margin:0 auto;order:-1}
  .grid-3,.grid-2,.stats,.cases,.crew{grid-template-columns:1fr}
  .calc-fields,.calc-res{grid-template-columns:1fr}
  .horizon{grid-template-columns:1fr;gap:4px}
  .dock{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:20;
    padding:12px 16px calc(12px + env(safe-area-inset-bottom));
    background:linear-gradient(to top,var(--ember) 68%,rgba(255,90,54,0));
  }
  .dock .cta{flex:1;justify-content:space-between;padding-left:26px;background:var(--ink)}
  .dock .cta .dot{color:var(--ink)}
  .dock .cta:hover{background:#000}
}
@media (max-width:620px){
  .symptom,.step{grid-template-columns:38px 1fr;gap:12px}
  .note{flex-direction:column;align-items:flex-start}
  .cta{font-size:16px;padding-left:24px}
  .cta .dot{width:46px;height:46px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}