/* ЧистВент — «инженерный лист»: графит, бетон, раскалённый акцент, пометки как на чертеже */
:root{
  --ink:#0a1b3f; --ink2:#11295a; --ink3:#1d3b78;
  --paper:#f2f6fc; --paper2:#ffffff; --card:#ffffff;
  --line:#d3dff0; --line2:#e4ecf7; --muted:#53627d; --muted2:#8393ad;
  --ember:#2164ff; --ember2:#4f86ff; --emberbg:#eaf1ff;
  --air:#6fd0ff; --air2:#2aa3e6;
  --ok:#14915f;
  --r:20px; --r2:30px;
  --ff:'Manrope',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
  --fd:'Manrope',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
  --fm:'IBM Plex Mono',ui-monospace,Menlo,Consolas,monospace;
  --w:1240px;
  --shadow:0 18px 50px -24px rgba(16,52,140,.28);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:90px}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.65 var(--ff);overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
:focus-visible{outline:2px solid var(--ember);outline-offset:3px;border-radius:6px}
.wrap{max-width:var(--w);margin:0 auto;padding:0 24px}
.mono{font:500 12px/1.4 var(--fm);letter-spacing:.08em;text-transform:uppercase}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ---------- кнопки ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;border:0;cursor:pointer;text-decoration:none;
  font:800 15px/1 var(--ff);padding:17px 24px;border-radius:999px;transition:transform .2s,background .2s,box-shadow .2s}
.btn svg{width:18px;height:18px;flex:none}
.btn-ember{background:linear-gradient(135deg,#2f74ff,#1f57e6);color:#fff;box-shadow:0 12px 30px -10px rgba(33,100,255,.65)}
.btn-ember:hover{background:linear-gradient(135deg,#4a86ff,#2164ff);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:inherit;box-shadow:inset 0 0 0 1.5px currentColor}
.btn-ghost:hover{background:rgba(127,127,127,.12)}
.btn-ink{background:var(--ink);color:#fff}
.btn-ink:hover{background:var(--ink3)}

/* ---------- шапка ---------- */
.top{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px);border-bottom:1px solid var(--line2)}
.top .wrap{display:flex;align-items:center;gap:22px;height:72px}
.logo{display:flex;align-items:center;gap:11px;text-decoration:none;flex:none}
.logo svg{width:38px;height:38px}
.logo b{font:800 19px/1 var(--fd);letter-spacing:-.01em}
.logo b i{font-style:normal;color:var(--ember)}
.city{display:inline-flex;align-items:center;gap:7px;background:none;border:1px solid var(--line);border-radius:999px;padding:8px 13px;font:600 14px/1 var(--ff);color:var(--ink);cursor:pointer;white-space:nowrap}
.city:hover{border-color:var(--ink)}
.city svg{width:14px;height:14px;color:var(--ember)}
.nav{display:flex;gap:4px;margin-left:auto}
.nav a{text-decoration:none;font:600 15px/1 var(--ff);padding:10px 13px;border-radius:999px;color:var(--ink2)}
.nav a:hover,.nav a[aria-current]{background:var(--card)}
.top .btn{padding:13px 19px;font-size:14px}
.burger{display:none;margin-left:auto;width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:none;cursor:pointer}
.burger span,.burger span:before,.burger span:after{display:block;width:18px;height:2px;background:var(--ink);margin:auto;position:relative;content:'';transition:.2s}
.burger span:before{position:absolute;top:-6px}.burger span:after{position:absolute;top:6px}

/* выбор города */
.cities{position:fixed;inset:0;z-index:80;background:rgba(14,19,22,.55);display:none;align-items:flex-start;justify-content:center;padding:90px 16px 20px;overflow:auto}
.cities.on{display:flex}
.cities .box{background:var(--paper2);border-radius:var(--r2);max-width:880px;width:100%;padding:30px 30px 34px;position:relative}
.cities h3{font:800 22px/1.2 var(--fd);margin:0 0 6px}
.cities p{margin:0 0 18px;color:var(--muted)}
.cities .x{position:absolute;right:18px;top:18px;width:40px;height:40px;border-radius:50%;border:0;background:var(--line2);cursor:pointer;font-size:22px;line-height:1}
.cities input{width:100%;font:500 16px var(--ff);padding:13px 16px;border-radius:12px;border:1px solid var(--line);margin-bottom:16px;background:#fff}
.cities .grp{font:500 11px var(--fm);letter-spacing:.1em;text-transform:uppercase;color:var(--muted2);margin:14px 0 8px}
.cities ul{list-style:none;margin:0;padding:0;columns:4 160px;column-gap:18px}
.cities li a{display:block;padding:5px 0;text-decoration:none;font-weight:500}
.cities li a:hover{color:var(--ember)}
.cities li a.cur{color:var(--ember);font-weight:700}

/* ---------- герой ---------- */
.hero{background:linear-gradient(135deg,#061433 0%,#0b2559 52%,#1443b8 100%);color:#e9eeee;position:relative;overflow:hidden;isolation:isolate}
.hero:before{content:'';position:absolute;inset:0;background:
  radial-gradient(900px 520px at 80% 40%,rgba(111,208,255,.28),transparent 60%),
  radial-gradient(700px 420px at 0% 120%,rgba(33,100,255,.45),transparent 60%);z-index:-1}
.grid-bg{position:absolute;inset:0;z-index:-1;opacity:.35;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:44px 44px;mask-image:linear-gradient(180deg,#000 40%,transparent)}
.hero .wrap{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:40px;align-items:center;padding-top:70px;padding-bottom:84px}
.hero .mono{color:var(--air)}
.hero h1{font:800 clamp(34px,4.6vw,62px)/1.04 var(--fd);letter-spacing:-.035em;margin:18px 0 22px}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,#7fd8ff,#bfe9ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{font-size:19px;color:#c4d4f0;max-width:560px;margin:0 0 32px}
.hero .acts{display:flex;flex-wrap:wrap;gap:12px}
.hero .facts{display:flex;flex-wrap:wrap;gap:10px 28px;margin-top:40px;padding-top:24px;border-top:1px solid rgba(255,255,255,.14)}
.hero .facts div{font:500 13px/1.4 var(--fm);color:#9fb6de;letter-spacing:.04em}
.hero .facts b{display:block;font:800 16px/1.3 var(--ff);color:#fff;letter-spacing:0;margin-bottom:2px}

/* сечение воздуховода — фирменный знак */
.duct{position:relative;aspect-ratio:1;width:100%;max-width:470px;margin-left:auto}
.duct .ph{position:absolute;inset:9%;border-radius:50%;overflow:hidden;box-shadow:0 0 0 1px rgba(255,255,255,.12),0 40px 90px -30px rgba(0,0,0,.8)}
.duct .ph img{width:100%;height:100%;object-fit:cover;transform:scale(1.08);animation:breathe 12s ease-in-out infinite}
@keyframes breathe{50%{transform:scale(1.16)}}
.duct svg.rings{position:absolute;inset:0;width:100%;height:100%;overflow:visible}
.rings .r{fill:none;stroke:rgba(255,255,255,.18);stroke-width:1}
.rings .flow{fill:none;stroke:#fff;stroke-width:2;stroke-linecap:round;stroke-dasharray:60 900;animation:spin 7s linear infinite;transform-origin:center}
.rings .flow2{stroke:var(--air);stroke-dasharray:24 600;animation-duration:11s;animation-direction:reverse}
@keyframes spin{to{stroke-dashoffset:-960}}
.tag{position:absolute;font:500 11px/1.3 var(--fm);letter-spacing:.08em;text-transform:uppercase;color:#e3f3ff;background:rgba(8,26,66,.7);backdrop-filter:blur(6px);border:1px solid rgba(255,255,255,.14);padding:8px 11px;border-radius:10px;white-space:nowrap}
.tag:before{content:'';display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--air);margin-right:8px;vertical-align:1px;box-shadow:0 0 0 4px rgba(111,208,255,.25)}
.tag.t1{left:-4%;top:16%}.tag.t2{right:-2%;top:46%}.tag.t3{left:6%;bottom:6%}

/* ---------- разделы ---------- */
.sec{padding:96px 0}
.sec.tight{padding:64px 0}
.sec.white{background:var(--paper2)}
.sec.dark{background:linear-gradient(160deg,#0a1b3f,#0f2c6b);color:#e8f0ff}
.sh{display:grid;grid-template-columns:200px 1fr;gap:24px;margin-bottom:44px;align-items:end}
.sh .mono{color:var(--muted2);border-top:2px solid var(--ink);padding-top:12px;align-self:start}
.dark .sh .mono{color:var(--air);border-color:var(--air)}
.sh h2{font:800 clamp(26px,3vw,42px)/1.12 var(--fd);letter-spacing:-.03em;margin:0;max-width:820px}
.sh p{margin:12px 0 0;color:var(--muted);max-width:720px}
.dark .sh p{color:#a9bde3}

/* карточки услуг */
.svc-groups{display:grid;gap:56px}
.svc-group h3{font:800 15px/1 var(--fm);letter-spacing:.1em;text-transform:uppercase;margin:0 0 18px;display:flex;align-items:center;gap:12px;color:var(--muted)}
.svc-group h3:after{content:'';flex:1;height:1px;background:var(--line)}
.svc{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:14px}
.card{position:relative;background:var(--card);border-radius:var(--r);box-shadow:0 1px 0 rgba(16,52,140,.04);padding:22px 22px 20px;text-decoration:none;display:flex;flex-direction:column;min-height:240px;overflow:hidden;transition:transform .25s,box-shadow .25s;border:1px solid var(--line2)}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#c7d7f3}
.card .n{font:500 11px var(--fm);color:var(--muted2);letter-spacing:.1em}
.card .im{position:absolute;right:-20px;top:46px;width:118px;height:118px;overflow:hidden;border-radius:50%;background:radial-gradient(circle at 40% 35%,#fff,#e2ecfd 72%);display:grid;place-items:center;transition:transform .35s}
.card .im img{width:76%;height:76%;object-fit:contain;filter:drop-shadow(0 10px 14px rgba(0,0,0,.18))}
.card:hover .im{transform:scale(1.06) rotate(-4deg)}
.card h4{font:800 17px/1.28 var(--fd);letter-spacing:-.015em;margin:10px 0 0;max-width:64%;position:relative;z-index:1}
.card .pr{margin-top:auto;display:flex;align-items:center;justify-content:space-between;padding-top:18px;border-top:1px dashed var(--line);position:relative;z-index:1;background:var(--card)}
.card .pr b{font:800 16px var(--ff)}
.card .pr span{width:36px;height:36px;border-radius:50%;background:var(--emberbg);color:var(--ember);display:grid;place-items:center;transition:.25s}
.card:hover .pr span{background:var(--ember);color:#fff}
.card .pr svg{width:16px;height:16px}

/* признаки */
.signs{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px;counter-reset:s}
.sign{background:var(--card);border-radius:var(--r);padding:20px 20px 22px;border:1px solid var(--line2);position:relative;counter-increment:s}
.sign:before{content:'0' counter(s);font:500 11px var(--fm);color:var(--ember);letter-spacing:.1em;display:block;margin-bottom:26px}
.sign p{margin:0;font-weight:600;line-height:1.45}
.dark .sign{background:var(--ink2);border-color:var(--ink3)}

/* этапы */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:0;position:relative;list-style:none;margin:0;padding:0}
.steps:before{content:'';position:absolute;left:0;right:0;top:27px;height:2px;background:repeating-linear-gradient(90deg,var(--air2) 0 10px,transparent 10px 18px);opacity:.6}
.steps li{position:relative;padding-right:22px}
.steps .dot{width:56px;height:56px;border-radius:50%;background:var(--ink);color:#fff;display:grid;place-items:center;font:800 18px var(--fd);position:relative;box-shadow:0 0 0 7px var(--paper)}
.white .steps .dot{box-shadow:0 0 0 7px var(--paper2)}
.steps .dot{background:linear-gradient(135deg,#0f2c6b,#2164ff)}
.steps li:last-child .dot{background:var(--air);color:var(--ink)}
.steps h4{font:800 17px/1.3 var(--fd);margin:20px 0 8px}
.steps p{margin:0;color:var(--muted);font-size:15px;line-height:1.55}

/* до / после */
.ba{position:relative;border-radius:var(--r2);overflow:hidden;aspect-ratio:16/9;background:#111;user-select:none;touch-action:pan-y}
.ba img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.ba .after{clip-path:inset(0 0 0 var(--x,50%))}
.ba .bar{position:absolute;top:0;bottom:0;left:var(--x,50%);width:2px;background:#fff;transform:translateX(-1px)}
.ba .bar:after{content:'⟷';position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:50px;height:50px;border-radius:50%;background:var(--ember);color:#fff;display:grid;place-items:center;font-size:20px;box-shadow:0 8px 24px rgba(0,0,0,.4)}
.ba input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:ew-resize;margin:0}
.ba .l{position:absolute;top:16px;font:500 11px var(--fm);letter-spacing:.1em;text-transform:uppercase;background:rgba(14,19,22,.7);color:#fff;padding:7px 10px;border-radius:8px}
.ba .l1{left:16px}.ba .l2{right:16px;background:var(--ember)}
.ba-cap{font:500 11px var(--fm);color:var(--muted2);letter-spacing:.06em;margin-top:10px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split h2{font:800 clamp(24px,2.6vw,36px)/1.15 var(--fd);letter-spacing:-.03em;margin:0 0 16px}
.checks{list-style:none;padding:0;margin:20px 0 0;display:grid;gap:10px}
.checks li{padding-left:34px;position:relative;font-weight:500}
.checks li:before{content:'';position:absolute;left:0;top:3px;width:20px;height:20px;border-radius:50%;background:var(--ember) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M5.5 10.5l3 3 6-7' fill='none' stroke='white' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/100% no-repeat}

/* статья (тексты) */
.article{font-size:17.5px;line-height:1.75}
.article h2{font:800 clamp(23px,2.3vw,31px)/1.2 var(--fd);letter-spacing:-.015em;margin:56px 0 18px;position:relative;padding-top:22px}
.article h2:before{content:'';position:absolute;top:0;left:0;width:44px;height:3px;background:var(--ember);border-radius:3px}
.article h2:first-child{margin-top:0}
.article h3{font:800 19px/1.35 var(--ff);margin:32px 0 10px}
.article p{margin:0 0 16px}
.article ul,.article ol{padding-left:0;margin:0 0 20px;list-style:none;display:grid;gap:8px}
.article ul li{padding-left:28px;position:relative}
.article ul li:before{content:'';position:absolute;left:4px;top:.72em;width:9px;height:9px;border:2px solid var(--ember);border-radius:50%}
.article ol{counter-reset:o}
.article ol li{padding-left:42px;position:relative;counter-increment:o}
.article ol li:before{content:counter(o);position:absolute;left:0;top:1px;width:28px;height:28px;border-radius:50%;background:var(--ink);color:#fff;font:800 13px/28px var(--fd);text-align:center}
.article strong{font-weight:700}
.article .note{background:var(--emberbg);border-left:4px solid var(--ember);border-radius:0 var(--r) var(--r) 0;padding:18px 22px;margin:26px 0;font-size:16.5px}
.article .note p:last-child{margin:0}
.tbl{overflow-x:auto;margin:24px 0 28px;border-radius:var(--r);border:1px solid var(--line);background:var(--card);-webkit-overflow-scrolling:touch}
.article table{border-collapse:collapse;width:100%;font-size:15.5px;line-height:1.5;min-width:520px}
.article th{background:#0f2c6b;color:#fff;text-align:left;font:600 13px/1.4 var(--ff);padding:13px 16px}
.article td{padding:13px 16px;border-top:1px solid var(--line2);vertical-align:top}
.article tr:nth-child(even) td{background:var(--paper2)}

/* районы */
.article ul.areas{display:flex;flex-wrap:wrap;gap:8px}
.article ul.areas li{padding:7px 14px}
.article ul.areas li:before{display:none}
.article ul.areas a:hover{color:var(--ember)}
.areas{display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none}
.areas li{background:var(--card);border:1px solid var(--line);border-radius:999px;padding:7px 14px;font-weight:600;font-size:14.5px}
.dark .areas li{background:var(--ink2);border-color:var(--ink3);color:#dfe6e6}
.local{display:grid;grid-template-columns:1fr 330px;gap:56px;align-items:start}
.local aside{position:sticky;top:96px;background:linear-gradient(160deg,#0b2152,#1546c4);color:#eef4ff;border-radius:var(--r2);padding:26px}
.local aside .mono{color:var(--air);display:block;margin-bottom:14px}
.local aside .areas li{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.18);color:#fff}
.local aside p{color:#c5d5f3;font-size:15px;margin:18px 0 0}

/* страница услуги */
.crumbs{font:500 13px/1.4 var(--ff);color:var(--muted);display:flex;flex-wrap:wrap;gap:6px;padding:22px 0 0;margin:0;list-style:none}
.crumbs li:not(:last-child):after{content:'/';margin-left:6px;color:var(--muted2)}
.crumbs a{text-decoration:none}.crumbs a:hover{color:var(--ember)}
.phead{padding:26px 0 70px;position:relative;overflow:hidden}
.phead .wrap>.g{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center}
.phead h1{font:800 clamp(30px,4vw,54px)/1.08 var(--fd);letter-spacing:-.035em;margin:22px 0 18px}
.phead .lead{font-size:19px;color:var(--muted);margin:0 0 28px;max-width:640px}
.phead .acts{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.price{display:inline-flex;align-items:baseline;gap:8px;background:var(--card);border:1px solid var(--line);border-radius:999px;padding:13px 20px;font-weight:600}
.price b{font:800 20px var(--fd);color:var(--ink)}
.price small{color:var(--muted);font-size:13px}
.obj{position:relative;aspect-ratio:1;max-width:420px;margin-left:auto;width:100%}
.obj:before{content:'';position:absolute;inset:4%;border-radius:50%;background:radial-gradient(circle at 40% 35%,#fff 0,#dce8fd 74%)}
.obj svg{position:absolute;inset:0;width:100%;height:100%}
.obj svg circle{fill:none;stroke:var(--line);stroke-width:1}
.obj svg .flow{stroke:var(--ember);stroke-width:2;stroke-dasharray:50 900;animation:spin 8s linear infinite;stroke-linecap:round}
.obj img{position:absolute;inset:18%;width:64%;height:64%;object-fit:contain;filter:drop-shadow(0 24px 30px rgba(0,0,0,.22))}
.obj .tag{background:var(--ink);color:#e6eeee}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:64px;align-items:start}
.side{position:sticky;top:96px;display:grid;gap:14px}
.box{background:var(--card);border-radius:var(--r2);padding:26px;border:1px solid var(--line2)}
.box h3{font:800 18px/1.3 var(--fd);margin:0 0 14px}
.box .checks{margin:0}
.box .checks li{font-size:15px;line-height:1.45}
.box.dark{background:linear-gradient(160deg,#0b2152,#1546c4);color:#eef4ff;border:0;box-shadow:var(--shadow)}
.box.dark p{color:#c5d5f3;font-size:15px;margin:0 0 18px}
.box .btn{width:100%;justify-content:center}

/* FAQ */
.faq{display:grid;gap:10px;max-width:900px}
.faq details{background:var(--card);border-radius:var(--r);border:1px solid var(--line2);transition:border-color .2s}
.faq details[open]{border-color:var(--ink)}
.faq summary{list-style:none;cursor:pointer;padding:20px 64px 20px 24px;font:800 17px/1.4 var(--ff);position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:'+';position:absolute;right:20px;top:50%;transform:translateY(-50%);width:32px;height:32px;border-radius:50%;background:var(--paper);display:grid;place-items:center;font:500 20px/1 var(--ff);transition:.25s}
.faq details[open] summary:after{content:'−';background:var(--ember);color:#fff}
.faq .a{padding:0 24px 22px;color:var(--ink2)}
.faq .a p{margin:0}
.dark .faq details{background:var(--ink2);border-color:var(--ink3)}
.dark .faq details[open]{border-color:var(--air2)}
.dark .faq .a{color:#c5d0d2}
.dark .faq summary:after{background:var(--ink3)}

/* заявка */
.lead-sec{background:linear-gradient(140deg,#0a1f4d 0%,#1446c2 100%);color:#eef4ff;position:relative;overflow:hidden;isolation:isolate}
.lead-sec:before{content:'';position:absolute;z-index:-1;width:900px;height:900px;right:-300px;top:-200px;border-radius:50%;
  background:repeating-radial-gradient(circle,rgba(255,255,255,.06) 0 1px,transparent 1px 34px)}
.lead-sec:after{content:'';position:absolute;z-index:-1;width:520px;height:520px;left:-160px;bottom:-260px;border-radius:50%;background:radial-gradient(circle,rgba(111,208,255,.35),transparent 65%)}
.lead-sec .wrap{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding-top:96px;padding-bottom:96px}
.lead-sec h2{font:800 clamp(28px,3.4vw,46px)/1.08 var(--fd);letter-spacing:-.035em;margin:16px 0 18px}
.lead-sec .mono{color:var(--air)}
.lead-sec p{color:#c6d6f3;margin:0 0 10px;font-size:17px}
.form{background:var(--paper2);color:var(--ink);border-radius:var(--r2);padding:30px;display:grid;gap:12px;box-shadow:0 40px 80px -30px rgba(0,0,0,.6)}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.form label{display:grid;gap:6px;font:600 13px var(--ff);color:var(--muted)}
.form input,.form select,.form textarea{font:500 16px var(--ff);color:var(--ink);background:#fff;border:1.5px solid var(--line);border-radius:12px;padding:14px 15px;width:100%;transition:border-color .2s}
.form textarea{min-height:92px;resize:vertical}
.form input:focus,.form select:focus,.form textarea:focus{outline:0;border-color:var(--ember)}
.form .agree{display:flex;gap:10px;align-items:flex-start;font:500 13px/1.45 var(--ff);color:var(--muted)}
.form .agree input{width:18px;height:18px;flex:none;margin-top:1px;accent-color:var(--ember)}
.form .btn{justify-content:center;width:100%;padding:19px}
.form .hp{position:absolute;left:-9999px}
.form .msg{font-weight:600;font-size:15px;margin:0;min-height:0}
.form .msg.ok{color:var(--ok)}.form .msg.err{color:#c33}
.form.sent>*:not(.done){display:none}
.form .done{display:none;text-align:center;padding:30px 10px}
.form.sent .done{display:block}
.done .ic{width:72px;height:72px;margin:0 auto 18px;border-radius:50%;background:var(--ember);display:grid;place-items:center;color:#fff}
.done h3{font:800 22px var(--fd);margin:0 0 8px}

/* прайс */
.prices{width:100%;border-collapse:collapse;background:var(--card);border-radius:var(--r);overflow:hidden}
.prices td,.prices th{padding:16px 20px;border-bottom:1px solid var(--line2);text-align:left}
.prices th{font:500 12px var(--fm);letter-spacing:.08em;text-transform:uppercase;color:var(--muted2);background:var(--paper2)}
.prices td:last-child{text-align:right;font-weight:700;white-space:nowrap}
.prices a{text-decoration:none;font-weight:600}.prices a:hover{color:var(--ember)}

/* плитки (организациям, о компании) */
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:14px}
.tile{background:var(--card);border-radius:var(--r);padding:26px;border:1px solid var(--line2)}
.tile .mono{color:var(--ember)}
.tile h3{font:800 18px/1.3 var(--fd);margin:14px 0 8px}
.tile p{margin:0;color:var(--muted);font-size:15.5px}
.dark .tile{background:var(--ink2);border-color:var(--ink3)}
.dark .tile p{color:#a9bde3}

/* подвал */
.foot{background:#061230;color:#9fb0cf;padding:64px 0 30px;font-size:15px}
.foot .g{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:32px}
.foot h4{font:500 11px var(--fm);letter-spacing:.12em;text-transform:uppercase;color:#6d82ad;margin:0 0 14px}
.foot ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.foot a{text-decoration:none;color:#d3def5}
.foot a:hover{color:var(--air)}
.foot .logo b{color:#fff}
.foot .about{margin:16px 0 0;max-width:320px;line-height:1.6}
.foot .bottom{margin-top:48px;padding-top:22px;border-top:1px solid #15264d;display:flex;flex-wrap:wrap;gap:12px 26px;font-size:13px;color:#6d82ad}
.foot .bottom a{color:#8ea2c9}

.mobile-cta{display:none}

/* появление при прокрутке */
.rv{opacity:0;transform:translateY(22px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.rv{opacity:1;transform:none}*{animation:none!important;transition:none!important}}

/* ---------- адаптив ---------- */
@media (max-width:1080px){
  .nav,.top .btn{display:none}
  .burger{display:block}
  .top.open .nav{display:flex;position:absolute;top:72px;left:0;right:0;flex-direction:column;background:var(--paper2);padding:12px 16px 20px;border-bottom:1px solid var(--line);gap:2px}
  .top.open .nav a{padding:14px 12px;font-size:17px}
  .layout{grid-template-columns:1fr;gap:40px}
  .side{position:static}
  .local{grid-template-columns:1fr}
  .local aside{position:static}
  .steps{grid-template-columns:1fr;gap:24px}
  .steps:before{left:27px;right:auto;top:0;bottom:0;width:2px;height:auto;background:repeating-linear-gradient(180deg,var(--air2) 0 10px,transparent 10px 18px)}
  .steps li{display:grid;grid-template-columns:56px 1fr;gap:0 18px;padding:0}
  .steps h4{margin:4px 0 6px}
  .steps li>div{grid-column:2}
  .foot .g{grid-template-columns:1fr 1fr}
}
@media (max-width:860px){
  body{font-size:16.5px}
  .wrap{padding:0 16px}
  .hero .wrap,.phead .wrap>.g,.lead-sec .wrap,.split,.layout,.local{grid-template-columns:minmax(0,1fr)}
  .hero h1{font-size:clamp(21px,6.6vw,34px)}
  .phead h1{font-size:clamp(24px,7.4vw,34px);overflow-wrap:break-word}
  .hero .lead,.phead .lead{font-size:17px}
  .card{min-height:196px}
  .card h4{max-width:58%;margin-bottom:22px}
  .card .im{top:38px;width:106px;height:106px;right:-10px}
  .sh h2{font-size:clamp(23px,6.4vw,30px)}
  .lead-sec h2{font-size:clamp(24px,7vw,32px)}
  .hero .wrap{padding-top:40px;padding-bottom:56px;gap:34px}
  .duct{max-width:340px;margin:0 auto}
  .obj{max-width:300px;margin:0 auto}
  .tag.t1{left:0}.tag.t2{right:0}
  .sec{padding:64px 0}
  .sh{grid-template-columns:1fr;gap:12px;margin-bottom:30px}
  .sh .mono{border-top-width:2px;width:max-content}
  .card h4{max-width:58%}
  .card .im{width:124px;height:124px}
  .form{padding:22px}
  .form .row{grid-template-columns:1fr}
  .lead-sec .wrap{padding-top:64px;padding-bottom:64px}
  .article{font-size:16.5px}
  .city span{max-width:110px;overflow:hidden;text-overflow:ellipsis}
  .foot{padding-bottom:96px}
  .cities .box{padding:24px 18px}
  .faq summary{padding:18px 58px 18px 18px;font-size:16px}
  .faq .a{padding:0 18px 20px}
}
@media (max-width:520px){
  .logo b{font-size:16px}.logo svg{width:32px;height:32px}
  .top .wrap{gap:10px}
  .foot .g{grid-template-columns:1fr}
  .hero .acts .btn{width:100%;justify-content:center}
  .tag{font-size:10px;padding:6px 8px}
}

/* вентилятор из логотипа */
.logo svg.fan{width:36px;height:36px}
.logo:hover svg.fan{animation:rot 1.6s cubic-bezier(.3,.6,.3,1)}
@keyframes rot{to{transform:rotate(360deg)}}
.logo b{font-weight:800;letter-spacing:-.02em}
.logo b i{color:var(--ember)}
.foot .logo b i{color:var(--air)}
.duct .fanbg{position:absolute;inset:-14%;width:128%;height:128%;opacity:.12;animation:rot 60s linear infinite;pointer-events:none}
.duct .fanbg path{fill:#bfe6ff}
.lead-sec .fanbg{position:absolute;z-index:-1;right:-140px;top:50%;width:620px;height:620px;margin-top:-310px;opacity:.08;animation:rot 90s linear infinite}
.lead-sec .fanbg path{fill:#fff}
.sh .mono{border-top-color:var(--ember)}
.dark .sh .mono{border-color:var(--air)}
.city svg{color:var(--ember)}
.hero .btn-ghost{color:#fff;box-shadow:inset 0 0 0 1.5px rgba(255,255,255,.55)}
.hero .btn-ghost:hover{background:rgba(255,255,255,.1)}
.sec.white{background:#fff}
.sign{transition:transform .25s,box-shadow .25s}
.sign:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.faq details{box-shadow:0 1px 0 rgba(16,52,140,.04)}
.faq details[open]{border-color:var(--ember);box-shadow:var(--shadow)}
@media (prefers-reduced-motion:reduce){.duct .fanbg,.lead-sec .fanbg{animation:none}}

.card h4{font-size:16.5px}
@media (max-width:860px){.card h4{max-width:62%}}

/* телефон */
.tel{display:inline-flex;align-items:center;gap:8px;text-decoration:none;font:800 16px var(--ff);color:var(--ink);white-space:nowrap;margin-left:6px}
.tel svg{width:18px;height:18px;color:var(--ember)}
.tel:hover{color:var(--ember)}
.tel-m{display:none;width:44px;height:44px;border-radius:50%;background:var(--ember);color:#fff;place-items:center;flex:none}
.tel-m svg{width:19px;height:19px}
.hero .btn svg{width:17px;height:17px}
.lead-tel{font-size:18px!important;color:#fff!important;margin:4px 0 6px!important}
.lead-tel a{color:#fff;font-weight:800;text-decoration:none;border-bottom:2px solid var(--air);white-space:nowrap}
.foot-tel{font:800 18px var(--ff);color:#fff!important}
.contact-tel a{font:800 clamp(28px,4vw,40px)/1.1 var(--fd);letter-spacing:-.03em;color:var(--ember);text-decoration:none}
.btn-ghost-w{background:#fff;color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--line)}
.btn-ghost-w svg{color:var(--ember)}
@media (max-width:1240px){.tel span{display:none}.tel{margin-left:0}}
@media (max-width:1080px){.tel{display:none}.tel-m{display:grid;margin-left:auto}.burger{margin-left:0}}
@media (max-width:860px){
  .mobile-cta{display:grid;grid-template-columns:1fr 1fr;gap:8px;position:fixed;left:10px;right:10px;bottom:10px;z-index:40}
  .mobile-cta .btn{justify-content:center;padding:16px 10px;box-shadow:0 14px 40px -10px rgba(10,27,63,.5)}
}