/* ===== Алгоритм Плюс — дизайн-система ===== */
:root{
  --ink:#16181d; --ink-2:#23262e; --graphite:#2e323c;
  --red:#e11b22; --red-d:#b3151b; --red-l:#ff3b42;
  --paper:#ffffff; --mist:#f5f6f8; --mist-2:#eceef2; --line:#e2e5ea;
  --muted:#6b7280; --muted-2:#9aa1ac;
  --ok:#1e9e5a;
  --shadow-s:0 2px 10px rgba(22,24,29,.06);
  --shadow-m:0 12px 30px rgba(22,24,29,.10);
  --shadow-l:0 24px 60px rgba(22,24,29,.16);
  --radius:14px; --radius-s:10px; --radius-l:22px;
  --wrap:1180px; --gutter:20px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font:'Manrope','Segoe UI',system-ui,-apple-system,Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;overflow-y:scroll}/* полоса прокрутки всегда есть — контент не «прыгает» между страницами */
body{
  margin:0;font-family:var(--font);color:var(--ink);background:var(--paper);
  font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{line-height:1.15;letter-spacing:-.02em;margin:0 0 .5em;font-weight:800}
h1{font-size:clamp(2rem,5vw,3.5rem)}
h2{font-size:clamp(1.6rem,3.6vw,2.6rem)}
h3{font-size:clamp(1.15rem,2vw,1.5rem)}
p{margin:0 0 1em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--gutter)}
.section{padding:clamp(56px,8vw,110px) 0}
.section--mist{background:var(--mist)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.8rem;font-weight:800;letter-spacing:.14em;
  text-transform:uppercase;color:var(--red);margin-bottom:16px}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--red);display:inline-block}
.lead{font-size:clamp(1.05rem,1.6vw,1.25rem);color:var(--muted);max-width:60ch}
.center{text-align:center}.center .lead{margin-inline:auto}

/* dot-matrix motif */
.dots{background-image:radial-gradient(currentColor 1.4px,transparent 1.5px);background-size:16px 16px;opacity:.14}

/* ===== buttons ===== */
.btn{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:1rem;
  padding:14px 26px;border-radius:999px;border:2px solid transparent;cursor:pointer;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .2s,color .2s;
  white-space:nowrap;font-family:inherit}
.btn svg{width:18px;height:18px}
.btn--red{background:var(--red);color:#fff;box-shadow:0 10px 24px rgba(225,27,34,.30)}
.btn--red:hover{background:var(--red-d);transform:translateY(-2px);box-shadow:0 16px 32px rgba(225,27,34,.40)}
.btn--ghost{border-color:rgba(255,255,255,.35);color:#fff}
.btn--ghost:hover{background:rgba(255,255,255,.12);transform:translateY(-2px)}
.btn--dark{background:var(--ink);color:#fff}
.btn--dark:hover{background:var(--graphite);transform:translateY(-2px)}
.btn--outline{border-color:var(--line);color:var(--ink);background:#fff}
.btn--outline:hover{border-color:var(--red);color:var(--red);transform:translateY(-2px)}
.btn--lg{padding:17px 34px;font-size:1.08rem}

/* ===== header ===== */
.hdr{position:sticky;top:0;z-index:70;background:rgba(255,255,255,.86);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);transition:box-shadow .3s}
.hdr.scrolled{box-shadow:var(--shadow-s)}
.hdr__row{display:flex;align-items:center;gap:22px;height:76px}
.logo{display:inline-flex;align-items:center;flex:0 0 auto}
.logo svg{height:38px;width:auto;display:block}
.nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav a,.nav>.has>button{font:inherit;font-weight:700;font-size:.97rem;color:var(--ink);background:none;border:0;
  padding:10px 14px;border-radius:10px;cursor:pointer;display:inline-flex;align-items:center;gap:6px;white-space:nowrap;transition:color .2s,background .2s}
.nav a:hover,.nav>.has>button:hover{color:var(--red);background:var(--mist)}
.nav .caret{width:10px;height:10px;transition:transform .25s}
.has{position:relative}
.has:hover .caret{transform:rotate(180deg)}
.drop{position:absolute;top:calc(100% + 8px);left:0;min-width:288px;background:#fff;border:1px solid var(--line);
  border-radius:16px;box-shadow:var(--shadow-m);padding:10px;opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .22s,transform .22s,visibility .22s}
.has:hover .drop,.has:focus-within .drop{opacity:1;visibility:visible;transform:translateY(0)}
.drop a{display:flex;flex-direction:column;gap:2px;padding:10px 12px;border-radius:10px;font-weight:700}
.drop a span{font-weight:500;font-size:.82rem;color:var(--muted)}
.drop a:hover{background:var(--mist)}
.hdr__cta{display:flex;align-items:center;gap:14px;margin-left:8px}
.hdr__phone{font-weight:800;font-size:1.02rem;white-space:nowrap}
.hdr__phone span{display:block;font-weight:600;font-size:.7rem;color:var(--muted);letter-spacing:.04em}
.burger{display:none;width:46px;height:46px;border:1px solid var(--line);border-radius:12px;background:#fff;cursor:pointer;
  flex-direction:column;gap:5px;align-items:center;justify-content:center;margin-left:auto}
.burger span{width:20px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== hero ===== */
.hero{position:relative;color:#fff;background:var(--ink);overflow:hidden}
.hero__bg{position:absolute;inset:0;object-fit:cover;width:100%;height:100%;opacity:.55}
.hero::after{content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,var(--ink) 20%,rgba(22,24,29,.7) 48%,rgba(22,24,29,.25) 100%)}
.hero__inner{position:relative;z-index:2;padding:clamp(64px,10vw,130px) 0;max-width:680px}
.hero--sm .hero__inner{padding:clamp(52px,7vw,84px) 0;max-width:760px}
.hero h1{color:#fff}
.hero .lead{color:rgba(255,255,255,.82)}
.hero__cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}
.hero__stats{display:flex;gap:34px;flex-wrap:wrap;margin-top:44px}
.hero__stats b{display:block;font-size:2rem;color:#fff;line-height:1}
.hero__stats span{font-size:.85rem;color:rgba(255,255,255,.66)}
.crumbs{position:relative;z-index:2;padding-top:26px;font-size:.85rem;color:rgba(255,255,255,.6)}
.crumbs a:hover{color:#fff}.crumbs b{color:#fff;font-weight:600}

/* ===== cards / grids ===== */
.grid{display:grid;gap:22px}
.g-2{grid-template-columns:repeat(2,1fr)}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s;position:relative;overflow:hidden}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-m);border-color:transparent}
.card__ic{width:54px;height:54px;border-radius:14px;display:grid;place-items:center;margin-bottom:18px;
  background:linear-gradient(135deg,#fff0f0,#ffe3e4);color:var(--red)}
.card__ic svg{width:28px;height:28px}
.card h3{margin-bottom:8px}
.card p{color:var(--muted);margin:0;font-size:.97rem}
.card--link::after{content:"→";position:absolute;right:24px;bottom:22px;color:var(--red);font-weight:800;
  opacity:0;transform:translateX(-6px);transition:.3s}
.card--link:hover::after{opacity:1;transform:translateX(0)}

/* product cards */
.prod{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:transform .3s var(--ease),box-shadow .3s var(--ease)}
.prod:hover{transform:translateY(-6px);box-shadow:var(--shadow-m)}
.prod__media{aspect-ratio:16/10;background:var(--mist);overflow:hidden}
.prod__media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.prod:hover .prod__media img{transform:scale(1.05)}
.prod__body{padding:26px;display:flex;flex-direction:column;flex:1}
.prod__body h3{margin-bottom:6px}
.prod__body p{color:var(--muted);font-size:.95rem;flex:1}
.prod__price{font-weight:800;font-size:1.15rem;margin:6px 0 16px}
.prod__price span{font-weight:600;font-size:.8rem;color:var(--muted)}
.tag{display:inline-block;font-size:.72rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;
  color:var(--red);background:#fff0f0;padding:5px 11px;border-radius:999px;margin-bottom:14px}

/* feature list */
.checks{list-style:none;padding:0;margin:0;display:grid;gap:12px}
.checks li{display:flex;gap:12px;align-items:flex-start;font-size:1rem}
.checks svg{flex:0 0 auto;width:22px;height:22px;color:var(--ok);margin-top:2px}
.checks--red svg{color:var(--red)}

/* split */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(30px,5vw,70px);align-items:center}
.split--rev .split__media{order:2}
.split__media img{border-radius:var(--radius-l);box-shadow:var(--shadow-m);width:100%}
.media-frame{border-radius:var(--radius-l);overflow:hidden;box-shadow:var(--shadow-m);position:relative}

/* steps */
.steps{counter-reset:s;display:grid;gap:20px}
.step{display:flex;gap:20px;align-items:flex-start;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:24px 26px}
.step__n{counter-increment:s;flex:0 0 auto;width:46px;height:46px;border-radius:12px;background:var(--ink);color:#fff;
  font-weight:800;font-size:1.15rem;display:grid;place-items:center}
.step__n::before{content:counter(s)}
.step h3{margin:0 0 4px;font-size:1.15rem}.step p{margin:0;color:var(--muted);font-size:.96rem}

/* price table */
.ptable{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.ptable th,.ptable td{padding:16px 20px;text-align:left;border-bottom:1px solid var(--line)}
.ptable th{background:var(--ink);color:#fff;font-size:.86rem;letter-spacing:.03em}
.ptable tr:last-child td{border-bottom:0}
.ptable tbody tr:hover{background:var(--mist)}
.ptable .num{font-weight:800;white-space:nowrap}

/* CTA band */
.cta{position:relative;color:#fff;background:var(--ink);border-radius:var(--radius-l);overflow:hidden;
  padding:clamp(40px,6vw,68px);margin:0 auto}
.cta__bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.5}
.cta::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,var(--ink),rgba(22,24,29,.25))}
.cta__in{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap}
.cta h2{color:#fff;margin:0 0 8px}.cta p{color:rgba(255,255,255,.8);margin:0;max-width:52ch}

/* faq */
.faq{max-width:820px;margin:0 auto;display:grid;gap:14px}
.q{background:#fff;border:1px solid var(--line);border-radius:var(--radius-s);overflow:hidden}
.q summary{padding:20px 24px;font-weight:800;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:center}
.q summary::-webkit-details-marker{display:none}
.q summary::after{content:"+";font-size:1.5rem;color:var(--red);transition:transform .3s;flex:0 0 auto}
.q[open] summary::after{transform:rotate(45deg)}
.q p{padding:0 24px 22px;margin:0;color:var(--muted)}

/* logos/trust strip */
.trust{display:flex;flex-wrap:wrap;gap:14px 30px;align-items:center;justify-content:center;color:var(--muted-2)}
.trust .pill{display:inline-flex;align-items:center;gap:10px;font-weight:700;color:var(--graphite);
  background:#fff;border:1px solid var(--line);border-radius:999px;padding:10px 18px;font-size:.92rem}
.trust .pill svg{width:20px;height:20px;color:var(--red)}

/* footer */
.ftr{background:var(--ink);color:rgba(255,255,255,.72);padding:64px 0 30px;font-size:.95rem}
.ftr a:hover{color:#fff}
.ftr__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px}
.ftr h4{color:#fff;font-size:1rem;margin:0 0 16px}
.ftr ul{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.ftr .logo{color:#fff;margin-bottom:16px}.ftr .logo b{color:#fff}
.ftr__bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:44px;padding-top:22px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.85rem;color:var(--muted-2)}
.ftr__contact{display:grid;gap:8px}
.ftr__contact b{color:#fff;font-size:1.15rem}

/* forms & modal */
.formcard{background:#fff;border-radius:var(--radius-l);box-shadow:var(--shadow-m);padding:clamp(26px,3vw,40px)}
.field{margin-bottom:16px}
.field input,.field textarea{width:100%;padding:15px 18px;border:1.5px solid var(--line);border-radius:12px;
  font:inherit;font-size:1rem;transition:border-color .2s;background:var(--mist)}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--red);background:#fff}
.hp{position:absolute!important;left:-9999px!important;width:1px;height:1px;overflow:hidden;opacity:0}
.consent{display:flex;gap:10px;align-items:flex-start;margin:4px 0 14px;font-size:.85rem;color:var(--muted);cursor:pointer;line-height:1.45}
.consent input{flex:0 0 auto;width:18px;height:18px;margin-top:2px;accent-color:var(--red);cursor:pointer}
.consent a{color:var(--red);text-decoration:underline}
.form__note{font-size:.8rem;color:var(--muted);margin-top:6px}
.resp{margin-top:14px}
.resp .success{color:var(--ok);font-weight:700}
.resp .error{color:var(--red);font-weight:700}

.modal{position:fixed;inset:0;z-index:100;display:none;place-items:center;padding:20px;
  background:rgba(22,24,29,.62);backdrop-filter:blur(4px)}
.modal.open{display:grid;animation:fade .25s var(--ease)}
.modal__box{background:#fff;border-radius:var(--radius-l);max-width:460px;width:100%;padding:clamp(26px,4vw,40px);
  position:relative;box-shadow:var(--shadow-l);animation:pop .3s var(--ease)}
.modal__x{position:absolute;top:16px;right:16px;width:38px;height:38px;border:0;border-radius:10px;background:var(--mist);
  cursor:pointer;font-size:1.3rem;color:var(--muted);line-height:1}
.modal__x:hover{background:var(--mist-2);color:var(--ink)}
@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes pop{from{opacity:0;transform:translateY(16px) scale(.98)}to{opacity:1;transform:none}}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}

/* prose */
.prose h2{margin-top:1.6em}.prose h3{margin-top:1.4em}
.prose ul{padding-left:0;list-style:none;display:grid;gap:10px;margin:1em 0}
.prose ul li{position:relative;padding-left:30px;color:var(--ink)}
.prose ul li::before{content:"";position:absolute;left:0;top:9px;width:16px;height:16px;border-radius:50%;
  background:#fff0f0;box-shadow:inset 0 0 0 2px var(--red)}
.note{background:var(--mist);border-left:3px solid var(--red);border-radius:0 12px 12px 0;padding:18px 22px;margin:1.4em 0;color:var(--graphite)}
.note b{color:var(--ink)}

/* utilities */
.mt-s{margin-top:14px}.mt{margin-top:26px}.mt-l{margin-top:44px}
.hide{display:none!important}

/* ===== responsive ===== */
@media(max-width:960px){
  .g-4{grid-template-columns:repeat(2,1fr)}
  .g-3{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr}.split--rev .split__media{order:0}
  .ftr__grid{grid-template-columns:1fr 1fr}
  .nav,.hdr__phone span{display:none}
  .burger{display:flex}
  .hdr__cta .btn{display:none}
  .nav.mobile{display:flex;position:fixed;inset:76px 0 0;background:#fff;flex-direction:column;align-items:stretch;
    gap:0;padding:16px 20px 40px;overflow-y:auto;z-index:60;border-top:1px solid var(--line)}
  .nav.mobile a,.nav.mobile>.has>button{width:100%;justify-content:space-between;padding:15px 12px;
    border-bottom:1px solid var(--line);border-radius:0;font-size:1.05rem}
  .nav.mobile .drop{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;
    padding:0 0 10px 12px;min-width:0;display:none}
  .nav.mobile .has.open .drop{display:block}
  .nav.mobile .has .caret{transition:transform .25s}
  .nav.mobile .has.open .caret{transform:rotate(180deg)}
}
@media(max-width:620px){
  body{font-size:16px}
  .g-2,.g-3,.g-4{grid-template-columns:1fr}
  .ftr__grid{grid-template-columns:1fr}
  .cta__in{flex-direction:column;align-items:flex-start}
  .hero__stats{gap:24px}
  .section{padding:52px 0}
  .ptable{display:block;overflow-x:auto;white-space:nowrap}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}