/* =========================================================
   santeh_nalchik — стили
   Палитра взята с баннера: глубокий тёмно-синий, яркий синий,
   «горячий» красный труб тёплого пола и латунь коллектора.
   ========================================================= */
:root{
  --navy-950:#060e1a;
  --navy-900:#0a1626;
  --navy-800:#0e1d33;
  --navy-700:#152a47;
  --blue:#2f86e8;
  --blue-2:#5aa8ff;
  --heat:#e2482f;
  --heat-2:#ff7b4a;
  --brass:#c9973f;
  --text:#e8eef7;
  --muted:#93a6bf;
  --line:rgba(255,255,255,.09);
  --light:#eef3f9;
  --light-2:#dfe8f3;
  --ink:#0d1b2e;
  --radius:18px;
  --ease:cubic-bezier(.22,.8,.24,1);
  --head:'Montserrat',system-ui,sans-serif;
  --body:'Manrope',system-ui,sans-serif;
  --hand:'Caveat',cursive;
  color-scheme:dark;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--navy-900);color:var(--text);font:400 16px/1.6 var(--body);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer;background:none;border:0}
svg{stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
svg .fill,svg.fill{fill:currentColor;stroke:none}
.container{width:min(1200px,100% - 32px);margin-inline:auto}
.blue{color:var(--blue-2)}
::selection{background:var(--blue);color:#fff}

/* progress */
.progress{position:fixed;inset:0 0 auto;height:3px;z-index:60;pointer-events:none}
.progress span{display:block;height:100%;width:100%;transform-origin:left;transform:scaleX(0);background:linear-gradient(90deg,var(--blue),var(--blue-2),var(--heat-2))}

/* ---------- кнопки ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:15px 26px;border-radius:999px;font:700 15px/1 var(--head);letter-spacing:.01em;transition:transform .3s var(--ease),box-shadow .3s,background .3s,color .3s;position:relative;overflow:hidden;white-space:nowrap}
.btn svg{width:18px;height:18px;transition:transform .3s var(--ease)}
.btn:hover svg{transform:translateX(3px)}
.btn--primary{background:var(--blue);color:#fff;box-shadow:0 10px 30px -10px rgba(47,134,232,.7)}
.btn--primary::after{content:"";position:absolute;inset:0;background:linear-gradient(110deg,transparent 30%,rgba(255,255,255,.35) 50%,transparent 70%);transform:translateX(-120%);transition:transform .8s var(--ease)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 16px 36px -12px rgba(47,134,232,.9)}
.btn--primary:hover::after{transform:translateX(120%)}
.btn--ghost{border:1.5px solid rgba(255,255,255,.22);color:var(--text)}
.btn--ghost:hover{border-color:var(--blue-2);background:rgba(90,168,255,.08)}
.btn--ghost svg.fill:hover{transform:none}
.btn--sm{padding:11px 18px;font-size:13px}
.btn--full{width:100%}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font:700 15px var(--head);color:var(--blue-2)}
.link-arrow svg{width:18px;height:18px;transition:transform .3s var(--ease)}
.link-arrow:hover svg{transform:translateX(4px)}
.linklike{padding:0;color:inherit;font-size:inherit;text-decoration:underline;text-underline-offset:3px;opacity:.8}
.linklike:hover{opacity:1}

/* ---------- заголовки секций ---------- */
.section{padding:clamp(80px,11vw,140px) 0;position:relative}
.eyebrow{display:inline-flex;align-items:center;gap:10px;margin:0 0 18px;font:700 13px/1 var(--head);letter-spacing:.16em;text-transform:uppercase;color:var(--blue-2)}
.eyebrow .dot{width:8px;height:8px;border-radius:50% 50% 50% 0;transform:rotate(-45deg);background:var(--blue-2);box-shadow:0 0 0 4px rgba(90,168,255,.18)}
.eyebrow--dark{color:var(--blue)}
.h2{margin:0;font:800 clamp(32px,4.6vw,56px)/1.05 var(--head);letter-spacing:-.02em;text-transform:uppercase}
.h2--dark{color:var(--ink)}
.head{margin-bottom:clamp(40px,6vw,64px);max-width:760px}
.head--row{max-width:none;display:flex;align-items:flex-end;justify-content:space-between;gap:32px;flex-wrap:wrap}
.head--row .head__sub{max-width:460px}
.head__sub{margin:18px 0 0;color:var(--muted);font-size:17px}

/* ---------- reveal ---------- */
[data-reveal]{opacity:0;transform:translateY(28px);transition:opacity .9s var(--ease) var(--d,0s),transform .9s var(--ease) var(--d,0s)}
[data-reveal].in{opacity:1;transform:none}

/* =========================================================
   ШАПКА
   ========================================================= */
.header{position:fixed;inset:0 0 auto;z-index:50;padding-top:env(safe-area-inset-top,0px);transition:background .4s,box-shadow .4s,backdrop-filter .4s}
.header__in{display:flex;align-items:center;gap:28px;height:78px;transition:height .4s}
.header.scrolled{background:rgba(8,18,32,.78);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:0 1px 0 var(--line)}
.header.scrolled .header__in{height:66px}
.logo{display:flex;align-items:center;gap:12px;flex-shrink:0}
.logo__drop{width:36px;height:36px;stroke:none}
.logo__drop path:first-child{fill:var(--blue)}
.logo__drop .logo__wave{stroke:#fff;stroke-width:2;fill:none}
.logo__text{display:flex;flex-direction:column;line-height:1.1}
.logo__text b{font:800 17px var(--head);letter-spacing:.01em}
.logo__text small{font:600 10.5px var(--head);letter-spacing:.12em;text-transform:uppercase;color:var(--blue-2);margin-top:3px}
.nav{display:flex;gap:4px;margin-left:auto}
.nav a{position:relative;padding:10px 13px;font:600 14px var(--head);color:#c9d5e5;transition:color .3s}
.nav a::after{content:"";position:absolute;left:13px;right:13px;bottom:4px;height:2px;border-radius:2px;background:var(--blue-2);transform:scaleX(0);transform-origin:right;transition:transform .4s var(--ease)}
.nav a:hover,.nav a.active{color:#fff}
.nav a:hover::after,.nav a.active::after{transform:scaleX(1);transform-origin:left}
.header__phone{display:flex;align-items:center;gap:10px;padding:10px 18px;border-radius:999px;background:rgba(47,134,232,.14);border:1px solid rgba(90,168,255,.35);font:700 15px var(--head);transition:background .3s}
.header__phone svg{width:18px;height:18px;fill:var(--blue-2);stroke:none}
.header__phone:hover{background:var(--blue)}
.header__phone:hover svg{fill:#fff}
.burger{display:none;width:44px;height:44px;margin-left:auto;position:relative}
.burger span{position:absolute;left:10px;right:10px;height:2px;background:#fff;border-radius:2px;transition:transform .35s var(--ease),top .35s}
.burger span:first-child{top:17px}.burger span:last-child{top:25px}
.burger[aria-expanded="true"] span:first-child{top:21px;transform:rotate(45deg)}
.burger[aria-expanded="true"] span:last-child{top:21px;transform:rotate(-45deg)}

/* =========================================================
   HERO
   ========================================================= */
.hero{position:relative;min-height:100svh;padding:120px 0 80px;display:flex;align-items:center;overflow:hidden;
  background:
   radial-gradient(900px 600px at 78% 40%,rgba(47,134,232,.16),transparent 60%),
   radial-gradient(600px 400px at 10% 100%,rgba(226,72,47,.08),transparent 60%),
   var(--navy-900)}
.hero::before{/* диагональный срез, как на баннере */content:"";position:absolute;top:0;bottom:0;left:54%;right:-10%;background:linear-gradient(180deg,#101f36,#0b1729);transform:skewX(-8deg);border-left:1px solid rgba(90,168,255,.18)}
.hero__bg{position:absolute;inset:0;pointer-events:none}
.hero__pipes{width:100%;height:100%;opacity:.5}
.hero__pipes path{stroke-width:6;fill:none;stroke-dasharray:1400;stroke-dashoffset:1400;animation:draw 3s var(--ease) .4s forwards}
.hero__pipes .p-cold{stroke:rgba(90,168,255,.25)}
.hero__pipes .p-hot{stroke:rgba(226,72,47,.25);animation-delay:.7s}
@keyframes draw{to{stroke-dashoffset:0}}
.hero__in{position:relative;display:grid;grid-template-columns:1.05fr 1fr;gap:40px;align-items:center}
.hero__title{margin:0;font:900 clamp(40px,6.2vw,86px)/.95 var(--head);text-transform:uppercase;letter-spacing:-.025em}
.hero__title .sm{display:block;font-size:.42em;font-weight:800;letter-spacing:.01em;margin-bottom:.35em;color:#dbe4f1}
.hero__title .blue{display:block;background:linear-gradient(90deg,var(--blue-2),var(--blue));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero__badge{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin:28px 0 22px}
.badge{display:inline-block;padding:12px 20px;border-radius:8px;background:var(--blue);font:800 clamp(16px,1.7vw,21px)/1 var(--head);text-transform:uppercase;letter-spacing:.02em;box-shadow:0 12px 30px -12px rgba(47,134,232,.8)}
.hero__any{font:700 15px var(--head);text-transform:uppercase;letter-spacing:.08em;color:#c6d3e4}
.hero__lead{max-width:500px;margin:0 0 32px;color:#b6c4d6;font-size:17.5px}
.hero__cta{display:flex;gap:14px;flex-wrap:wrap}
.hero__chips{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:34px 0 0}
.hero__chips li{padding:7px 14px;border:1px solid var(--line);border-radius:999px;font:600 13px var(--head);color:#aebdd0;background:rgba(255,255,255,.02)}
.hero__chips li::before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--heat);margin-right:8px;vertical-align:middle;box-shadow:0 0 8px var(--heat)}
.hero__scroll{position:absolute;left:50%;bottom:26px;width:26px;height:42px;border:2px solid rgba(255,255,255,.3);border-radius:14px;transform:translateX(-50%)}
.hero__scroll span{position:absolute;left:50%;top:8px;width:4px;height:8px;margin-left:-2px;border-radius:2px;background:var(--blue-2);animation:wheel 1.8s infinite}
@keyframes wheel{0%{opacity:0;transform:translateY(0)}30%{opacity:1}100%{opacity:0;transform:translateY(14px)}}

/* ---------- сцена с дверью ---------- */
.scene{position:relative;width:100%;max-width:540px;aspect-ratio:9/10;margin-left:auto;transform-style:preserve-3d;transition:transform .6s var(--ease)}
.scene__wall{position:absolute;inset:0 0 16%;border-radius:24px 24px 0 0;
  background:linear-gradient(180deg,#14243b,#101d31);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.04)}
.scene__wall::before{content:"";position:absolute;inset:0;border-radius:inherit;background:repeating-linear-gradient(90deg,transparent 0 59px,rgba(255,255,255,.025) 59px 60px)}
.scene__floor{position:absolute;left:-4%;right:-4%;bottom:0;height:16%;border-radius:0 0 24px 24px;
  background:linear-gradient(180deg,#0d1828,#0a1220);overflow:hidden}
.scene__floor::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(90deg,rgba(255,255,255,.04) 0 1px,transparent 1px 70px);transform:perspective(200px) rotateX(45deg);transform-origin:top}
/* тёплый свет, падающий из двери на пол */
.scene__spill{position:absolute;left:23%;right:23%;bottom:0;height:16%;z-index:1;
  background:linear-gradient(180deg,rgba(255,214,160,.45),rgba(255,214,160,0));
  clip-path:polygon(4% 0,96% 0,118% 100%,-18% 100%);opacity:0;transition:opacity 1.6s var(--ease) .5s;filter:blur(2px)}
.doorway{position:absolute;left:50%;bottom:16%;width:52%;aspect-ratio:300/480;transform:translateX(-50%);perspective:1600px;z-index:2}
.doorway__casing{position:absolute;inset:-14px -14px 0;border:14px solid #22344f;border-bottom:0;border-radius:6px 6px 0 0;pointer-events:none;
  box-shadow:0 0 0 1px rgba(255,255,255,.06),0 30px 60px -20px rgba(0,0,0,.6),inset 0 0 0 1px rgba(0,0,0,.4)}
.room{position:absolute;inset:0;overflow:hidden;background:#111}
.room__svg,.room__photo{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.room__dark{position:absolute;inset:0;background:#05080d;opacity:.94;transition:opacity 1.4s var(--ease) .35s}
.room__svg .lit{opacity:0;transition:opacity 1.6s var(--ease) .8s}
.room__svg .led{opacity:0;transition:opacity 1.2s var(--ease) 1.2s}
.room__svg .rail path{stroke:#c3c9d1;transition:stroke 1.8s var(--ease) 1.6s;stroke-linecap:round}
.room__svg .heat{stroke:var(--heat);stroke-width:3;opacity:.0;stroke-dasharray:2000;stroke-dashoffset:2000;transition:stroke-dashoffset 3s var(--ease) 1.3s,opacity .8s 1.3s;filter:drop-shadow(0 0 3px var(--heat))}
.room__svg .steam path{opacity:0}
.scene.open .room__dark{opacity:0}
.scene.open .scene__spill{opacity:1}
.scene.open .room__svg .lit,.scene.open .room__svg .led{opacity:1}
.scene.open .room__svg .rail path{stroke:#e99a6a}
.scene.open .room__svg .heat{opacity:.32;stroke-dashoffset:0}
.scene.open .room__svg .steam path{animation:steam 3.6s ease-in-out infinite 1.8s}
.scene.open .room__svg .steam path:nth-child(2){animation-delay:2.6s}
.scene.open .room__svg .steam path:nth-child(3){animation-delay:3.3s}
@keyframes steam{0%{opacity:0;transform:translateY(10px)}35%{opacity:.35}100%{opacity:0;transform:translateY(-34px)}}

.door{position:absolute;inset:0;transform-origin:left center;transform-style:preserve-3d;transition:transform 2s cubic-bezier(.6,.05,.2,1) .25s;z-index:3}
.scene.open .door{transform:rotateY(-108deg)}
.door__face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:2px}
.door__front{background:linear-gradient(90deg,#1c3352,#22406a 40%,#1d3657);box-shadow:inset 0 0 0 1px rgba(255,255,255,.06),inset -14px 0 30px rgba(0,0,0,.25);
  display:flex;flex-direction:column;gap:7%;padding:10% 12%}
.door__panel{flex:1;border-radius:3px;box-shadow:inset 0 0 0 1px rgba(255,255,255,.08),inset 2px 2px 0 rgba(0,0,0,.25),inset -1px -1px 0 rgba(255,255,255,.05)}
.door__panel:first-child{flex:1.4}
.door__plate{position:absolute;top:31%;left:50%;transform:translateX(-50%);display:flex;align-items:center;gap:6px;padding:5px 10px;border-radius:20px;background:rgba(255,255,255,.08);font:700 10px var(--head);letter-spacing:.14em;text-transform:uppercase;color:#cfe0f3}
.door__plate svg{width:12px;height:12px;fill:var(--blue-2);stroke:none}
.door__handle{position:absolute;right:9%;top:52%;width:26%;height:7px;border-radius:5px;background:linear-gradient(180deg,#f0d29a,#b88a3c);box-shadow:0 3px 6px rgba(0,0,0,.35);transform-origin:85% 50%}
.door__handle::after{content:"";position:absolute;right:-2px;top:-6px;width:16px;height:19px;border-radius:5px;background:linear-gradient(180deg,#e6c487,#a77c34);z-index:-1}
.scene.opening .door__handle{animation:handle .5s ease-in-out}
@keyframes handle{50%{transform:rotate(-22deg)}}
.door__back{transform:rotateY(180deg);background:linear-gradient(90deg,#132640,#183152);box-shadow:inset 0 0 0 1px rgba(255,255,255,.05)}
.scene__note{position:absolute;right:-7%;top:-3%;text-shadow:0 4px 18px rgba(0,0,0,.6);margin:0;font:600 clamp(24px,2.6vw,34px)/1 var(--hand);color:#fff;transform:rotate(-8deg);z-index:4;opacity:0;transition:opacity 1s 2.2s,transform 1s var(--ease) 2.2s}
.scene__note::after{content:"";display:block;width:80%;height:3px;margin-top:8px;border-radius:3px;background:var(--blue-2);transform:scaleX(0);transform-origin:left;transition:transform .8s var(--ease) 2.8s}
.scene.open .scene__note{opacity:1;transform:rotate(-8deg) translateY(-6px)}
.scene.open .scene__note::after{transform:scaleX(1)}
.scene__btn{position:absolute;left:50%;bottom:4%;transform:translateX(-50%);z-index:5;display:flex;align-items:center;gap:8px;padding:9px 16px;border-radius:999px;background:rgba(10,22,38,.75);border:1px solid var(--line);backdrop-filter:blur(8px);font:600 13px var(--head);color:#cbd8e8;transition:background .3s}
.scene__btn svg{width:16px;height:16px}
.scene__btn:hover{background:var(--blue);color:#fff}

/* =========================================================
   БЕГУЩАЯ СТРОКА
   ========================================================= */
.ticker{background:var(--blue);overflow:hidden;padding:18px 0;transform:rotate(-1.2deg);margin:-12px -10px 0;position:relative;z-index:3;box-shadow:0 20px 40px -20px rgba(0,0,0,.6)}
.ticker__track{display:flex;align-items:center;gap:34px;width:max-content;animation:ticker 32s linear infinite}
.ticker span{font:800 clamp(18px,2vw,24px) var(--head);text-transform:uppercase;letter-spacing:.06em;white-space:nowrap}
.ticker i{width:12px;height:12px;border-radius:50% 50% 50% 0;transform:rotate(-45deg);background:#fff;flex-shrink:0}
@keyframes ticker{to{transform:translateX(-50%)}}

/* =========================================================
   УСЛУГИ
   ========================================================= */
.svc{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(24px,4vw,56px);align-items:start}
.svc__list{list-style:none;margin:0;padding:0;counter-reset:s}
.svc__list li{border-top:1px solid var(--line)}
.svc__list li:last-child{border-bottom:1px solid var(--line)}
.svc__tab{width:100%;display:flex;align-items:center;gap:20px;padding:22px 6px;text-align:left;position:relative;transition:padding .4s var(--ease)}
.svc__tab .n{font:700 13px var(--head);color:var(--muted);min-width:28px;transition:color .3s}
.svc__tab .t{font:700 clamp(19px,2vw,25px)/1.2 var(--head);flex:1;transition:color .3s}
.svc__tab .ar{width:38px;height:38px;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;transition:all .4s var(--ease)}
.svc__tab .ar svg{width:16px;height:16px}
.svc__tab::before{content:"";position:absolute;left:0;top:-1px;height:2px;width:100%;background:linear-gradient(90deg,var(--heat),var(--blue));transform:scaleX(0);transform-origin:left;transition:transform .6s var(--ease)}
.svc__tab:hover{padding-left:14px}
.svc__tab:hover .t{color:#fff}
.svc__tab[aria-selected="true"] .n{color:var(--heat-2)}
.svc__tab[aria-selected="true"] .t{color:#fff}
.svc__tab[aria-selected="true"] .ar{background:var(--blue);border-color:var(--blue);transform:rotate(-45deg)}
.svc__tab[aria-selected="true"]::before{transform:scaleX(1)}
.svc__tab[aria-selected="false"] .t{color:#9db0c7}
.svc__panel{position:sticky;top:100px;border-radius:24px;overflow:hidden;background:linear-gradient(160deg,#13253f,#0d1b30);border:1px solid var(--line)}
.svc__art{height:240px;position:relative;background:radial-gradient(400px 200px at 50% 100%,rgba(47,134,232,.25),transparent),#0b1729;border-bottom:1px solid var(--line);overflow:hidden}
.svc__art svg{position:absolute;inset:0;width:100%;height:100%}
.svc__art .draw{stroke-dasharray:var(--len,900);stroke-dashoffset:var(--len,900);animation:draw 1.8s var(--ease) forwards}
.svc__art .hot{stroke:var(--heat)}.svc__art .cold{stroke:var(--blue-2)}.svc__art .metal{stroke:#c7d0db}.svc__art .brass{stroke:var(--brass)}
.svc__art .flow{stroke-dasharray:6 14;animation:flow 1.2s linear infinite}
@keyframes flow{to{stroke-dashoffset:-40}}
.svc__body{padding:32px clamp(22px,3vw,40px) 36px}
.svc__num{font:700 13px var(--head);letter-spacing:.14em;color:var(--heat-2)}
.svc__title{margin:8px 0 14px;font:800 clamp(24px,2.6vw,32px)/1.15 var(--head);text-transform:uppercase}
.svc__text{margin:0 0 22px;color:#b3c2d5}
.svc__tags{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:0 0 26px}
.svc__tags li{display:flex;align-items:center;gap:8px;padding:8px 14px;border-radius:10px;background:rgba(255,255,255,.04);border:1px solid var(--line);font:600 13.5px var(--body);color:#d4deeb}
.svc__tags li svg{width:15px;height:15px;color:var(--blue-2);stroke-width:2.5}
.svc__body > *{animation:fadeUp .6s var(--ease) both}
.svc__body > :nth-child(2){animation-delay:.05s}.svc__body > :nth-child(3){animation-delay:.1s}.svc__body > :nth-child(4){animation-delay:.15s}.svc__body > :nth-child(5){animation-delay:.2s}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}}

/* =========================================================
   ПРОЦЕСС — труба с водой
   ========================================================= */
.process{background:linear-gradient(180deg,var(--navy-900),var(--navy-950))}
.pipe{position:relative;padding-top:12px}
.pipe__line{position:absolute;left:0;right:0;top:30px;width:100%;height:40px}
.pipe__shell{stroke:#1d3150;stroke-width:14;stroke-linecap:butt}
.pipe__flow{stroke:var(--blue-2);stroke-width:4;stroke-dasharray:14 22;stroke-linecap:round;opacity:0;transition:opacity 1s}
.pipe.in .pipe__flow{opacity:1;animation:flow 1s linear infinite}
.pipe__steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(6,1fr);gap:20px;position:relative}
.pipe__steps li{position:relative}
.valve{display:grid;place-items:center;width:56px;height:56px;margin-bottom:22px;border-radius:50%;background:var(--navy-800);border:2px solid #2a4467;font:800 18px var(--head);color:var(--blue-2);position:relative;transition:all .5s var(--ease)}
.valve::after{content:"";position:absolute;inset:-7px;border-radius:50%;border:1px dashed rgba(90,168,255,.35);animation:spin 12s linear infinite}
.pipe__steps li:hover .valve{background:var(--blue);color:#fff;border-color:var(--blue);transform:rotate(90deg)}
@keyframes spin{to{transform:rotate(360deg)}}
.pipe__steps h3{margin:0 0 8px;font:700 17px/1.25 var(--head)}
.pipe__steps p{margin:0;color:var(--muted);font-size:14.5px}

/* =========================================================
   ПРЕИМУЩЕСТВА — светлая секция со «змейкой» тёплого пола
   ========================================================= */
.adv{background:var(--light);color:var(--ink);overflow:hidden;clip-path:polygon(0 4vw,100% 0,100% calc(100% - 4vw),0 100%);margin:-4vw 0;padding-top:calc(clamp(80px,11vw,140px) + 4vw);padding-bottom:calc(clamp(80px,11vw,140px) + 4vw);z-index:2}
.adv__snake{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.adv__snake path{fill:none;stroke:var(--heat);stroke-width:10;stroke-linecap:round;opacity:.12}
.adv .container{position:relative}
.adv__grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;grid-template-rows:auto auto;gap:18px}
.adv__item{position:relative;padding:32px 30px;border-radius:var(--radius);background:rgba(255,255,255,.75);backdrop-filter:blur(6px);border:1px solid #d4dfec;transition:transform .5s var(--ease),box-shadow .5s,background .5s}
.adv__item:hover{transform:translateY(-6px);box-shadow:0 24px 50px -24px rgba(13,27,46,.35);background:#fff}
.adv__item h3{margin:22px 0 10px;font:800 21px/1.2 var(--head);text-transform:uppercase}
.adv__item p{margin:0;color:#4a5d75}
.adv__icon{width:64px;height:64px;border-radius:50%;display:grid;place-items:center;border:2px solid var(--blue);color:var(--blue)}
.adv__icon svg{width:30px;height:30px;stroke-width:2.2}
.adv__item:hover .adv__icon svg{animation:wobble .6s var(--ease)}
@keyframes wobble{30%{transform:rotate(-12deg) scale(1.1)}60%{transform:rotate(8deg)}}
.adv__item--big{grid-row:span 2;background:var(--ink);color:#fff;border-color:transparent;display:flex;flex-direction:column;justify-content:flex-end;min-height:360px;overflow:hidden}
.adv__item--big::before{content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;border-radius:50%;background:radial-gradient(circle,rgba(47,134,232,.5),transparent 70%)}
.adv__item--big:hover{background:#10223b}
.adv__item--big p{color:#b3c2d5}
.adv__item--big .adv__icon{border-color:var(--blue-2);color:var(--blue-2);margin-bottom:auto}
.adv__item--big h3{font-size:clamp(26px,2.6vw,34px)}
.adv__item--accent{grid-column:span 2;background:linear-gradient(110deg,var(--blue),#1f6fd0);color:#fff;border-color:transparent}
.adv__item--accent:hover{background:linear-gradient(110deg,#3a91f2,#2479dc)}
.adv__item--accent p{color:#dce9fb}
.adv__item--accent .adv__icon{border-color:#fff;color:#fff}
.adv__words{list-style:none;padding:0;margin:56px 0 0;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px 24px}
.adv__words li{font:900 clamp(22px,3.6vw,46px)/1 var(--head);text-transform:uppercase;letter-spacing:-.01em;color:transparent;-webkit-text-stroke:1.5px #9fb2c9;transition:color .4s}
.adv__words li:hover{color:var(--ink);-webkit-text-stroke-color:var(--ink)}

/* =========================================================
   РАБОТЫ
   ========================================================= */
.works{padding-top:calc(clamp(80px,11vw,140px) + 4vw)}
.gallery{display:grid;grid-auto-flow:dense;grid-template-columns:repeat(4,1fr);grid-auto-rows:220px;gap:16px}
.work{position:relative;margin:0;border-radius:var(--radius);overflow:hidden;background:#0f1f36;border:1px solid var(--line);isolation:isolate}
.work--wide{grid-column:span 2}
.work--tall{grid-row:span 2}
.work img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform 1.2s var(--ease)}
.work:hover img{transform:scale(1.06)}
/* заглушка, пока нет фото */
.work::before,.ba__img::before{content:"📷  " attr(data-file) "\A" attr(data-size) " px";white-space:pre;position:absolute;inset:0;display:grid;place-items:center;text-align:center;font:600 13px/1.6 var(--head);color:#6f86a3;z-index:-1;
  background:
   repeating-linear-gradient(135deg,rgba(255,255,255,.02) 0 12px,transparent 12px 24px),
   radial-gradient(circle at 30% 20%,rgba(47,134,232,.14),transparent 60%),#0f1f36}
.work figcaption{position:absolute;left:0;right:0;bottom:0;padding:40px 22px 18px;display:flex;flex-direction:column;background:linear-gradient(0deg,rgba(6,14,26,.9),transparent);transform:translateY(8px);transition:transform .5s var(--ease)}
.work figcaption b{font:700 17px var(--head)}
.work figcaption span{font-size:13.5px;color:#a9bad0;opacity:0;max-height:0;transition:opacity .4s,max-height .4s}
.work:hover figcaption{transform:none}
.work:hover figcaption span{opacity:1;max-height:30px}

.ba{margin-top:70px}
.ba__head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:20px}
.ba__head h3{margin:0;font:800 clamp(24px,2.6vw,32px) var(--head);text-transform:uppercase}
.ba__head p{margin:0;color:var(--muted)}
.ba__frame{position:relative;aspect-ratio:16/8;border-radius:24px;overflow:hidden;border:1px solid var(--line);user-select:none}
.ba__img{position:absolute;inset:0;margin:0;isolation:isolate}
.ba__img img{width:100%;height:100%;object-fit:cover}
.ba__before{clip-path:inset(0 calc(100% - var(--pos)) 0 0)}
.ba__after::before{padding-left:50%}
.ba__before::before{padding-right:50%;background:repeating-linear-gradient(135deg,rgba(255,255,255,.03) 0 12px,transparent 12px 24px),#1a1f27}
.ba__label{position:absolute;top:18px;padding:6px 14px;border-radius:999px;background:rgba(6,14,26,.7);backdrop-filter:blur(6px);font:700 12px var(--head);letter-spacing:.12em;text-transform:uppercase;pointer-events:none}
.ba__label--l{left:18px}.ba__label--r{right:18px;background:var(--blue)}
.ba__handle{position:absolute;top:0;bottom:0;left:var(--pos);width:3px;margin-left:-1.5px;background:#fff;pointer-events:none}
.ba__handle svg{position:absolute;top:50%;left:50%;width:48px;height:48px;padding:12px;margin:-24px 0 0 -24px;border-radius:50%;background:#fff;color:var(--ink);stroke-width:2.5;box-shadow:0 8px 24px rgba(0,0,0,.4)}
.ba__range{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:ew-resize;margin:0}

/* =========================================================
   ОТЗЫВЫ
   ========================================================= */
.reviews{background:linear-gradient(180deg,var(--navy-900),#0b1a2e)}
.reviews__nav{display:flex;gap:10px}
.round{width:52px;height:52px;border-radius:50%;border:1px solid rgba(255,255,255,.2);display:grid;place-items:center;transition:all .3s}
.round svg{width:20px;height:20px}
.round:hover{background:var(--blue);border-color:var(--blue)}
.reviews__track{display:grid;grid-auto-flow:column;grid-auto-columns:min(420px,85%);gap:18px;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none;padding-bottom:6px}
.reviews__track::-webkit-scrollbar{display:none}
.review{scroll-snap-align:start;position:relative;padding:34px 30px 28px;border-radius:var(--radius);background:linear-gradient(160deg,#132641,#0e1d33);border:1px solid var(--line);display:flex;flex-direction:column;gap:18px;min-height:300px}
.review::before{content:"“";position:absolute;right:24px;top:6px;font:900 110px/1 var(--head);color:rgba(90,168,255,.12)}
.review__stars{display:flex;gap:3px;color:#ffc24a}
.review__stars svg{width:18px;height:18px;fill:currentColor;stroke:none}
.review__text{margin:0;color:#cfdae8;flex:1}
.review__who{display:flex;align-items:center;gap:14px}
.review__ava{width:46px;height:46px;border-radius:50%;object-fit:cover;background:var(--blue);display:grid;place-items:center;font:800 18px var(--head);flex-shrink:0}
.review__who b{display:block;font:700 15px var(--head)}
.review__who small{color:var(--muted)}
.review--empty{border-style:dashed;border-color:rgba(90,168,255,.3);background:rgba(255,255,255,.015);align-items:center;justify-content:center;text-align:center;color:var(--muted)}
.review--empty::before{color:rgba(90,168,255,.08)}
.review--empty svg{width:42px;height:42px;color:var(--blue-2);opacity:.7}
.review--empty b{color:#d2deeb;font:700 17px var(--head)}
.review--empty p{margin:0;font-size:14px;max-width:260px}
.reviews__cta{margin:30px 0 0;color:var(--muted)}
.reviews__cta a{color:var(--blue-2);font-weight:700;border-bottom:1px solid currentColor}

/* =========================================================
   КОНТАКТЫ
   ========================================================= */
.contacts{background:radial-gradient(700px 500px at 0% 100%,rgba(47,134,232,.18),transparent 60%),#0b1a2e;overflow:hidden}
.contacts__in{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,6vw,80px);align-items:center}
.contacts__phone{display:inline-block;margin-top:32px;font:900 clamp(30px,4.4vw,54px)/1 var(--head);letter-spacing:-.01em;background:linear-gradient(90deg,#fff,#b9d6ff);-webkit-background-clip:text;background-clip:text;color:transparent;transition:opacity .3s}
.contacts__phone:hover{opacity:.85}
.contacts__region{margin:12px 0 30px;font:700 14px var(--head);letter-spacing:.14em;text-transform:uppercase;color:var(--blue-2)}
.contacts__links{display:flex;flex-wrap:wrap;gap:10px}
.clink{display:inline-flex;align-items:center;gap:10px;padding:12px 18px;border-radius:14px;border:1px solid var(--line);background:rgba(255,255,255,.03);font:600 14.5px var(--head);transition:all .3s var(--ease)}
.clink svg{width:20px;height:20px;color:var(--blue-2)}
.clink:hover{border-color:var(--blue-2);transform:translateY(-3px);background:rgba(90,168,255,.08)}

.form{padding:clamp(26px,3.5vw,42px);border-radius:24px;background:rgba(255,255,255,.035);border:1px solid var(--line);backdrop-filter:blur(10px);box-shadow:0 40px 80px -40px rgba(0,0,0,.6)}
.form h3{margin:0 0 6px;font:800 24px var(--head);text-transform:uppercase}
.form__hint{margin:0 0 24px;color:var(--muted);font-size:14px}
.field{position:relative;display:block;margin-bottom:14px}
.field input,.field textarea,.field select{width:100%;padding:24px 16px 10px;border-radius:12px;border:1px solid rgba(255,255,255,.12);background:rgba(6,14,26,.5);color:var(--text);font:500 16px var(--body);outline:none;transition:border-color .3s,box-shadow .3s;resize:vertical;appearance:none}
.field select{cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235aa8ff' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;background-size:18px}
.field select option{background:var(--navy-800)}
.field span{position:absolute;left:17px;top:17px;color:var(--muted);font-size:15px;pointer-events:none;transition:all .25s var(--ease)}
.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--blue-2);box-shadow:0 0 0 4px rgba(90,168,255,.15)}
.field input:focus + span,.field input:not(:placeholder-shown) + span,
.field textarea:focus + span,.field textarea:not(:placeholder-shown) + span,
.field select + span{top:7px;font-size:11.5px;letter-spacing:.04em;color:var(--blue-2)}
.field.err input{border-color:var(--heat);animation:shake .4s}
@keyframes shake{25%{transform:translateX(-5px)}75%{transform:translateX(5px)}}
.check{display:flex;gap:12px;align-items:flex-start;margin:8px 0 22px;font-size:13.5px;color:#aebdd0;cursor:pointer;line-height:1.5}
.check input{position:absolute;opacity:0;pointer-events:none}
.check__box{flex-shrink:0;width:22px;height:22px;border-radius:6px;border:1.5px solid rgba(255,255,255,.3);display:grid;place-items:center;transition:all .25s}
.check__box::after{content:"";width:10px;height:6px;border:2.5px solid #fff;border-top:0;border-right:0;transform:rotate(-45deg) scale(0);margin-top:-3px;transition:transform .25s var(--ease)}
.check input:checked + .check__box{background:var(--blue);border-color:var(--blue)}
.check input:checked + .check__box::after{transform:rotate(-45deg) scale(1)}
.check input:focus-visible + .check__box{box-shadow:0 0 0 4px rgba(90,168,255,.3)}
.check.err .check__box{border-color:var(--heat);animation:shake .4s}
.check a{color:var(--blue-2);text-decoration:underline;text-underline-offset:2px}
.form__msg{margin:14px 0 0;min-height:1.4em;font-size:14px;color:var(--heat-2);text-align:center}
.form__msg.ok{color:#5ad69a}

/* =========================================================
   ПОДВАЛ / FAB / COOKIE
   ========================================================= */
.footer{background:var(--navy-950);border-top:1px solid var(--line);padding:46px 0 28px;font-size:14px;color:var(--muted)}
.footer__in{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;padding-bottom:28px;border-bottom:1px solid var(--line)}
.footer__in .logo{color:var(--text)}
.footer__nav,.footer__legal{display:flex;flex-wrap:wrap;gap:8px 22px}
.footer__nav a:hover,.footer__legal a:hover{color:#fff}
.footer__legal{width:100%;justify-content:flex-start;font-size:13px}
.footer__legal a{text-decoration:underline;text-underline-offset:3px;opacity:.8}
.footer__bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;padding-top:22px;font-size:12.5px}
.footer__note{opacity:.7;max-width:560px}

.fab{display:none;position:fixed;right:18px;bottom:18px;z-index:40;width:60px;height:60px;border-radius:50%;background:var(--blue);place-items:center;box-shadow:0 12px 30px -8px rgba(47,134,232,.8)}
.fab svg{width:26px;height:26px;color:#fff}
.fab::before{content:"";position:absolute;inset:0;border-radius:50%;border:2px solid var(--blue);animation:ping 2s infinite}
@keyframes ping{to{transform:scale(1.6);opacity:0}}

.cookie{position:fixed;left:20px;bottom:20px;z-index:70;width:min(440px,calc(100% - 32px));display:grid;grid-template-columns:auto 1fr;gap:6px 16px;padding:22px;border-radius:20px;background:rgba(14,29,51,.94);backdrop-filter:blur(14px);border:1px solid rgba(90,168,255,.25);box-shadow:0 30px 60px -20px rgba(0,0,0,.7);animation:cookieIn .7s var(--ease) both}
.cookie[hidden]{display:none}
.cookie.out{animation:cookieOut .45s var(--ease) both}
@keyframes cookieIn{from{opacity:0;transform:translateY(30px) scale(.96)}}
@keyframes cookieOut{to{opacity:0;transform:translateY(30px) scale(.96)}}
.cookie__icon{font-size:30px;line-height:1;animation:bob 3s ease-in-out infinite}
@keyframes bob{50%{transform:rotate(-12deg) translateY(-3px)}}
.cookie__text b{font:700 16px var(--head)}
.cookie__text p{margin:6px 0 0;font-size:13.5px;color:#aebdd0;line-height:1.5}
.cookie__text a{color:var(--blue-2);text-decoration:underline}
.cookie__btns{grid-column:1/-1;display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.cookie__btns .btn{flex:1}

/* =========================================================
   АДАПТИВ
   ========================================================= */
@media (max-width:1100px){
  .nav a{padding:10px 9px;font-size:13.5px}
  .header__phone span{display:none}
  .header__phone{padding:11px}
}
@media (max-width:960px){
  .burger{display:block}
  .header__phone{margin-left:auto}
  .burger{margin-left:0}
  .nav{position:fixed;inset:0;margin:0;z-index:-1;flex-direction:column;justify-content:center;align-items:center;gap:6px;background:rgba(6,14,26,.97);backdrop-filter:blur(10px);opacity:0;visibility:hidden;transition:opacity .4s,visibility .4s}
  .nav a{font-size:24px;padding:12px 20px;opacity:0;transform:translateY(16px);transition:opacity .4s,transform .4s var(--ease),color .3s}
  .nav.open{opacity:1;visibility:visible}
  .nav.open a{opacity:1;transform:none}
  .nav.open a:nth-child(2){transition-delay:.05s}.nav.open a:nth-child(3){transition-delay:.1s}.nav.open a:nth-child(4){transition-delay:.15s}.nav.open a:nth-child(5){transition-delay:.2s}.nav.open a:nth-child(6){transition-delay:.25s}
  .hero{padding-top:110px}
  .hero::before{left:-10%;top:58%;transform:skewY(-6deg);border-left:0;border-top:1px solid rgba(90,168,255,.18)}
  .hero__in{grid-template-columns:1fr}
  .scene{margin:10px auto 0;max-width:460px}
  .svc{grid-template-columns:1fr}
  .svc__panel{position:relative;top:0}
  .pipe__steps{grid-template-columns:1fr 1fr 1fr;row-gap:40px}
  .pipe__line{display:none}
  .adv__grid{grid-template-columns:1fr 1fr}
  .adv__item--big{grid-row:auto;grid-column:span 2;min-height:300px}
  .gallery{grid-template-columns:repeat(2,1fr);grid-auto-rows:200px}
  .contacts__in{grid-template-columns:1fr}
  .fab{display:grid}
}
@media (max-width:600px){
  body{font-size:15.5px}
  .logo__text small{display:none}
  .hero__scroll,.hero__chips{display:none}
  .hero__cta .btn{flex:1}
  .scene__note{right:0;top:2%}
  .pipe__steps{grid-template-columns:1fr;gap:0;padding-left:0}
  .pipe__steps li{display:grid;grid-template-columns:56px 1fr;column-gap:20px;padding-bottom:30px}
  .pipe__steps li::before{content:"";position:absolute;left:27px;top:56px;bottom:0;width:2px;background:linear-gradient(var(--blue-2),#1d3150)}
  .pipe__steps li:last-child::before{display:none}
  .pipe__steps .valve{grid-row:span 2;margin:0}
  .adv__grid{grid-template-columns:1fr}
  .adv__item--big,.adv__item--accent{grid-column:auto}
  .gallery{grid-template-columns:1fr;grid-auto-rows:240px}
  .work--wide,.work--tall{grid-column:auto;grid-row:auto}
  .ba__frame{aspect-ratio:4/3}
  .work figcaption span{opacity:1;max-height:30px}
  .cookie{left:16px;bottom:16px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;transition-delay:0s!important}
  html{scroll-behavior:auto}
}

/* капли в иллюстрации «Водоснабжение» */
.svc__art .drop{animation:drip 1.4s ease-in infinite;opacity:0}
.svc__art .d2{animation-delay:.7s}
@keyframes drip{0%{transform:translateY(-10px);opacity:0}20%{opacity:1}100%{transform:translateY(46px);opacity:0}}

/* =========================================================
   ЮРИДИЧЕСКИЕ СТРАНИЦЫ
   ========================================================= */
.legal{padding:130px 0 90px;background:radial-gradient(800px 400px at 80% 0,rgba(47,134,232,.14),transparent 60%),var(--navy-900)}
.legal__in{width:min(860px,100% - 32px);margin-inline:auto}
.legal h1{margin:0 0 10px;font:800 clamp(28px,4vw,44px)/1.1 var(--head);text-transform:uppercase}
.legal .upd{color:var(--muted);margin:0 0 40px}
.legal h2{margin:42px 0 14px;font:700 21px/1.3 var(--head);color:#fff}
.legal p,.legal li{color:#c3d0e0}
.legal ul{padding-left:22px}
.legal li{margin-bottom:6px}
.legal a{color:var(--blue-2);text-decoration:underline}
.legal .fill-in{background:rgba(226,72,47,.15);color:#ffb39a;padding:1px 6px;border-radius:4px;font-weight:600}
.legal table{width:100%;border-collapse:collapse;margin:10px 0;font-size:14.5px}
.legal th,.legal td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top;color:#c3d0e0}
.legal th{color:#fff;background:rgba(255,255,255,.03)}
.legal__back{display:inline-flex;align-items:center;gap:8px;margin-bottom:30px;font:700 14px var(--head);color:var(--blue-2)}
.legal__back svg{width:18px;height:18px}
.legal [data-reveal]{opacity:1;transform:none}