/* ЭлТех — стили лендинга */
:root{
  --graphite:#11151B;
  --graphite-2:#181D25;
  --line:#2A313C;
  --volt:#F5C400;
  --volt-hover:#FFD83D;
  --insulator:#EEF0F2;
  --paper:#FFFFFF;
  --steel:#9AA4B2;
  --steel-light:#BCC4CF;
  --ink:#11151B;
  --ink-2:#3B4656;
  --cobalt:#1E3A8A;
  --radius-l:20px;
  --radius-m:12px;
  --display:"Unbounded", "Arial Black", sans-serif;
  --text:"Manrope", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono:"IBM Plex Mono", ui-monospace, monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--graphite);color:#F2F4F7;font-family:var(--text);font-size:17px;line-height:1.55}
img,svg,iframe{display:block;max-width:100%}
a{color:inherit}
h1,h2,h3{margin:0;font-weight:700}
p{margin:0}
:focus-visible{outline:3px solid var(--volt);outline-offset:3px;border-radius:4px}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-9999px;top:8px;background:var(--volt);color:var(--ink);padding:10px 16px;border-radius:8px;z-index:10}
.skip:focus{left:8px}

/* Шапка */
.site-header{position:sticky;top:env(safe-area-inset-top,0px);z-index:5;background:rgba(17,21,27,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-row{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:72px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;min-height:44px}
.brand-mark{width:40px;height:40px}
.brand-name{font-family:var(--display);font-weight:700;font-size:20px;letter-spacing:.02em}
.nav{display:flex;gap:28px;font-size:15px;font-weight:500}
.nav a{text-decoration:none;color:var(--steel-light);padding:8px 0}
.nav a:hover{color:#fff}
.header-actions{display:flex;align-items:center;gap:8px}
.icon-btn{text-decoration:none;width:44px;height:44px;border-radius:50%;display:grid;place-items:center;box-shadow:inset 0 0 0 1px var(--line);color:#F2F4F7}
.icon-btn:hover{box-shadow:inset 0 0 0 1px var(--steel)}
.icon-btn svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.phone-pill{display:inline-flex;align-items:center;height:44px;padding:0 18px;border-radius:999px;background:#F2F4F7;color:var(--ink);font-weight:700;font-size:15px;text-decoration:none;white-space:nowrap}
.phone-pill:hover{background:#fff}

/* Значок Max: название сервиса набрано фирменным шрифтом сайта */
.max-mark{font-family:var(--display);font-weight:700;font-size:11px;letter-spacing:.04em;line-height:1;color:#F2F4F7;transition:color .2s ease}
.icon-max:hover .max-mark{color:var(--volt)}
.max-icon{width:22px;height:22px;display:block}
.msg-btn .max-icon{width:20px;height:20px}

/* Кнопки */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:52px;padding:0 28px;border-radius:999px;font:inherit;font-weight:700;font-size:16px;text-decoration:none;cursor:pointer;border:0}
.btn-primary{background:var(--volt);color:var(--ink)}
.btn-primary:hover{background:var(--volt-hover)}
.btn-ghost{box-shadow:inset 0 0 0 1px var(--line);color:#F2F4F7;background:transparent}
.btn-ghost:hover{box-shadow:inset 0 0 0 1px var(--steel)}
.btn-outline{box-shadow:inset 0 0 0 1.5px var(--volt);color:var(--volt);background:transparent}
.btn-outline:hover{background:rgba(245,196,0,.08)}
.btn-block{width:100%}

/* Первый экран */
.hero{padding:56px 0 72px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:40px;align-items:center}
.hero-place{color:var(--volt);font-weight:700;font-size:16px;margin-bottom:20px}
.hero-copy{position:relative;z-index:1;min-width:0;container-type:inline-size}
/* Самое длинное слово «Высоковольтные» в Unbounded ≈ 10,6 кегля: кегль считаем от ширины колонки, чтобы слово всегда помещалось целиком */
.hero h1{font-family:var(--display);font-weight:600;font-size:clamp(26px,4vw,58px);font-size:clamp(24px,9cqi,58px);line-height:1.06;letter-spacing:-.02em;text-wrap:balance;hyphens:manual;overflow-wrap:normal;word-break:keep-all}
.lead{margin-top:24px;max-width:58ch;font-size:19px;color:var(--steel-light)}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.hero-facts{list-style:none;padding:0;margin:44px 0 0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;border-top:1px solid var(--line);padding-top:24px;max-width:640px}
.hero-facts li{font-size:14px;color:var(--steel);line-height:1.4}
.hero-facts b{display:block;font-family:var(--display);font-weight:600;font-size:20px;color:#F2F4F7;margin-bottom:6px}
.hero-art{min-width:0;overflow:hidden}
.hero-art svg{width:100%;height:auto;max-width:460px;margin-left:auto}
.wire-dim path{fill:none;stroke:var(--line);stroke-width:1}
.tower path{fill:none;stroke:#F2F4F7;stroke-width:2;stroke-linejoin:round;stroke-linecap:round}
.insulators circle{fill:var(--volt)}
.wire-live{fill:none;stroke:var(--volt);stroke-width:2.5;stroke-dasharray:6 10}
.kv text{font-family:var(--mono);font-size:13px;fill:var(--steel)}
@keyframes current{to{stroke-dashoffset:-64}}
/* Первый экран: опора «чертится» при загрузке, затем загораются изоляторы и по проводу идёт ток */
.tower path{stroke-dasharray:1;animation:draw 1.3s cubic-bezier(.6,0,.2,1) both}
.tower path:nth-child(2){animation-delay:.45s}
.tower path:nth-child(3){animation-delay:.65s;animation-duration:1.1s}
.tower path:nth-child(4){animation-delay:1.05s;animation-duration:.5s}
.wire-dim path{animation:fade .9s ease .2s both}
.insulators circle{transform-box:fill-box;transform-origin:center;animation:pop .35s cubic-bezier(.3,1.6,.5,1) both}
.insulators circle:nth-child(1){animation-delay:1.3s}.insulators circle:nth-child(2){animation-delay:1.36s}
.insulators circle:nth-child(3){animation-delay:1.42s}.insulators circle:nth-child(4){animation-delay:1.48s}
.insulators circle:nth-child(5){animation-delay:1.54s}.insulators circle:nth-child(6){animation-delay:1.6s}
.wire-live{animation:fade .5s ease 1.7s both,current 2.4s linear 1.7s infinite}
.kv text{animation:fade .6s ease 1.9s both}
@keyframes draw{from{stroke-dashoffset:1}to{stroke-dashoffset:0}}
@keyframes pop{from{transform:scale(0);opacity:0}to{transform:scale(1);opacity:1}}
@keyframes fade{from{opacity:0}to{opacity:1}}
@media (prefers-reduced-motion:reduce){.wire-live{animation:none}html{scroll-behavior:auto}}

/* Секции */
.section{padding:96px 0;scroll-margin-top:60px}
.section-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:32px;align-items:end;margin-bottom:48px}
.section-head h2,.about-text h2,.contacts-info h2{hyphens:manual;overflow-wrap:normal;font-family:var(--display);font-weight:600;font-size:clamp(28px,3.4vw,46px);line-height:1.08;letter-spacing:-.01em}
.section-head p{max-width:52ch;color:var(--steel-light)}
.light{background:var(--insulator);color:var(--ink)}
.light .section-head p{color:var(--ink-2)}

/* Высоковольтные сети */
.hv{border-top:1px solid var(--line)}
.hv-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--line);border-radius:var(--radius-l);overflow:hidden;margin-bottom:32px}
.hv-item{background:var(--graphite-2);padding:28px;display:flex;flex-direction:column;gap:8px}
.hv-item .code{font-family:var(--mono);font-size:22px;color:var(--volt)}
.hv-item h3{font-size:18px}
.hv-item p{font-size:15px;color:var(--steel)}

/* Карточки зданий */
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.card{background:var(--paper);border-radius:var(--radius-l);overflow:hidden;display:flex;flex-direction:column}
.card-photo{height:200px;background:#1B212A;display:grid;place-items:center}
.card-photo svg{width:72%;height:auto;max-height:160px}
.card-photo .ln{fill:none;stroke:#DDE2E8;stroke-width:2;stroke-linejoin:round;stroke-linecap:round}
.card-photo .acc{fill:none;stroke:var(--volt);stroke-width:2.5;stroke-linecap:round;stroke-linejoin:round}
.card-photo .accf{fill:var(--volt)}
.card-body{padding:24px 24px 28px}
.card-body h3{font-size:22px;margin-bottom:12px}
.card-body ul{margin:0;padding-left:18px;color:var(--ink-2);font-size:15px;line-height:1.75}

/* Этапы: наведённый этап «под напряжением» — линия заполняется жёлтым, раскрывается подробный текст */
.steps{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:16px;counter-reset:step}
.step{position:relative;counter-increment:step;border-top:2px solid var(--line);padding-top:18px;display:flex;flex-direction:column;gap:8px;outline:none}
.step::after{content:"";position:absolute;left:0;top:-2px;height:2px;width:0;background:var(--volt);transition:width .45s cubic-bezier(.4,0,.2,1)}
.step::before{content:counter(step);font-family:var(--mono);font-size:14px;color:var(--steel);transition:color .3s ease}
.step h3{font-size:17px;transition:color .3s ease}
.step-short{font-size:14px;color:var(--steel);line-height:1.5}
.step-more{font-size:14px;line-height:1.5;color:var(--steel-light);opacity:0;transform:translateY(-6px);transition:opacity .35s ease,transform .35s ease}
.step:hover::after,.step:focus-visible::after,.steps:not(:hover):not(:focus-within) .step:first-child::after{width:100%}
.step:hover::before,.step:focus-visible::before,.steps:not(:hover):not(:focus-within) .step:first-child::before{color:var(--volt)}
.step:hover .step-more,.step:focus-visible .step-more,.steps:not(:hover):not(:focus-within) .step:first-child .step-more{opacity:1;transform:none}
.step:focus-visible{box-shadow:0 0 0 3px var(--volt);border-radius:4px}
@media (hover:none),(max-width:1080px){
  .step-more{opacity:1;transform:none}
  .step::before{color:var(--volt)}
  .steps:not(:hover):not(:focus-within) .step:first-child::after{width:100%}
}

/* О компании и документы */
.about-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:center}
.about{margin-top:20px;font-size:19px;color:var(--ink-2);max-width:52ch}
.facts{margin:32px 0 0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 32px}
.facts div{border-top:1px solid #CDD3DB;padding-top:14px}
.facts dt{font-size:14px;color:#566173;margin-bottom:4px}
.facts dd{margin:0;font-family:var(--display);font-weight:600;font-size:20px;line-height:1.25}
.facts dd.fact-note{font-family:var(--text);font-weight:500;font-size:14px;color:#566173;margin-top:6px;line-height:1.4}
.production{margin-top:56px;background:var(--graphite);color:#F2F4F7;border-radius:var(--radius-l);padding:40px;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:40px;align-items:start;scroll-margin-top:80px}
.prod-text{display:flex;flex-direction:column;align-items:flex-start;gap:16px}
.prod-text h3{font-family:var(--display);font-weight:600;font-size:clamp(22px,2.4vw,30px);line-height:1.15}
.prod-text p{color:var(--steel-light);max-width:56ch}
.models{list-style:none;margin:4px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.models li{font-family:var(--mono);font-size:14px;color:var(--volt);padding:6px 10px;border-radius:8px;box-shadow:inset 0 0 0 1px var(--line)}
.prod-text .models-note{font-size:14px;color:var(--steel);margin-top:-6px}
.doc-list{display:flex;flex-direction:column;gap:12px}
.doc{display:flex;align-items:center;gap:16px;background:var(--paper);color:var(--ink);border-radius:14px;padding:18px 20px;text-decoration:none;min-height:64px}
.doc:hover{box-shadow:inset 0 0 0 1.5px var(--volt)}
.doc svg{width:28px;height:28px;flex-shrink:0;fill:none;stroke:var(--cobalt);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.doc b{display:block}
.nowrap{white-space:nowrap}
.doc>span{min-width:0}

.optional-photo{overflow:hidden;border-radius:var(--radius-l)}
.doc small{display:block;font-size:13px;color:#566173;margin-top:2px}

/* Контакты */
.contacts{border-top:1px solid var(--line)}
.contacts-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);gap:56px;align-items:start}
.contacts-info{display:flex;flex-direction:column;align-items:flex-start}
.contacts-lead{margin-top:16px;color:var(--steel-light);max-width:46ch}
.big-phone{margin-top:32px;font-family:var(--display);font-weight:600;font-size:clamp(28px,3.6vw,44px);letter-spacing:-.01em;text-decoration:none;white-space:nowrap;color:#F2F4F7;transition:color .2s ease}
.big-phone:hover{color:var(--volt)}
.messengers{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.msg-btn{display:inline-flex;align-items:center;gap:10px;min-height:48px;padding:0 18px;border-radius:999px;box-shadow:inset 0 0 0 1px var(--line);text-decoration:none;font-weight:700;font-size:15px;transition:box-shadow .2s ease,background-color .2s ease,transform .2s ease}
.msg-btn svg{width:20px;height:20px;fill:none;stroke:var(--volt);stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.msg-btn:hover{box-shadow:inset 0 0 0 1px var(--volt);background:rgba(245,196,0,.06);transform:translateY(-1px)}
.contact-list{margin:36px 0 0;display:grid;grid-template-columns:1fr;gap:20px;width:100%;border-top:1px solid var(--line);padding-top:24px}
.contact-list dt{font-size:14px;color:var(--steel);margin-bottom:4px}
.contact-list dd{margin:0;font-weight:700;font-size:18px;line-height:1.4}
.contact-list a{text-decoration:none;border-bottom:1px solid var(--line);transition:border-color .2s ease}
.contact-list a:hover{border-color:var(--volt)}
.map{position:relative;border-radius:var(--radius-l);overflow:hidden;box-shadow:inset 0 0 0 1px var(--line);background:var(--graphite-2);height:420px;isolation:isolate}
.map-fallback{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;text-align:center;padding:24px;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:40px 40px;transition:opacity .4s ease}
.map-fallback .map-pin{width:48px;height:60px;margin-bottom:8px}
.map-fallback b{font-size:18px}
.map-fallback span{color:var(--steel)}
.map-canvas{position:absolute;inset:0;opacity:0;transition:opacity .5s ease;background:var(--graphite-2)}
.map.is-ready .map-canvas{opacity:1}
.map.is-ready .map-fallback{opacity:0}
/* Тёмная карта в цветах сайта */
.map .leaflet-tile-pane{filter:grayscale(1) invert(1) brightness(.82) contrast(.92)}
.map .leaflet-container{background:var(--graphite-2);font-family:var(--text)}
.map-marker{background:none;border:0}
.map-marker svg{width:48px;height:60px;filter:drop-shadow(0 4px 8px rgba(0,0,0,.5))}
.map .leaflet-popup-content-wrapper{border-radius:12px;color:var(--ink)}
.map .leaflet-popup-content{font-size:14px;line-height:1.5;margin:12px 16px}
.map .leaflet-popup-content a{color:var(--cobalt);font-weight:700}
.map .leaflet-control-attribution{background:rgba(17,21,27,.75);color:var(--steel);font-size:11px}
.map .leaflet-control-attribution a{color:var(--steel-light)}
.map .leaflet-bar a{background:var(--graphite);color:#F2F4F7;border-color:var(--line)}
.map .leaflet-bar a:hover{background:var(--graphite-2)}
.map-links{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:12px}

/* Подвал */
.site-footer{border-top:1px solid var(--line);padding:40px 0;font-size:14px;color:var(--steel)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:24px}
.footer-grid>div{display:flex;flex-direction:column;gap:4px}
.footer-grid b{color:#F2F4F7}
.req{font-family:var(--mono);font-size:13px}

/* Плавные состояния */
.btn,.phone-pill,.icon-btn,.nav a,.doc,.contact-list a,.types span,.field input,.field textarea,.consent .box,.map-route{transition:background-color .2s ease,color .2s ease,box-shadow .2s ease,border-color .2s ease,transform .2s ease}
.btn:hover,.phone-pill:hover{transform:translateY(-1px)}
.btn:active,.phone-pill:active{transform:translateY(0)}
.doc:hover{transform:translateX(4px)}
.types span:hover{border-color:var(--ink)}
.hv-item{transition:background-color .25s ease}
.hv-item:hover{background:#1D232D}
.card-photo .photo{transition:transform .5s ease}
.card:hover .card-photo .photo{transform:scale(1.03)}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important}}
/* Режим для скриншотов (адрес с ?static): без вступительной анимации, всё сразу в конечном виде */
.no-intro *,.no-intro *::before,.no-intro *::after{animation:none!important;transition:none!important}
.no-intro .step-more{opacity:1!important;transform:none!important}
.no-intro .step::before{color:var(--volt)}

/* Фотографии: если файла нет, остаётся иллюстрация или блок скрывается */
.card-photo{position:relative;overflow:hidden}
.card-photo .photo{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.optional-photo{margin:0}
.optional-photo img{width:100%;height:auto;object-fit:cover;border-radius:var(--radius-l);background:var(--graphite-2)}
.hv-photo{margin-bottom:24px}
.hv-photo img{aspect-ratio:21/9}
.about-photo{margin:0}
.about-photo img{aspect-ratio:4/3}
.is-missing{display:none!important}

/* Карта */
.map{position:relative}
.map .ymap{position:absolute;inset:0}
.map-route{display:inline-block;font-size:15px;font-weight:700;color:var(--steel-light);text-decoration:none;border-bottom:1px solid var(--line)}
.map-route:hover{color:#fff;border-color:var(--volt)}

/* Шапка при прокрутке */
.header-row{transition:min-height .25s ease}
.site-header{transition:background-color .25s ease,box-shadow .25s ease}
.site-header.is-scrolled{background:rgba(17,21,27,.97);box-shadow:0 8px 24px rgba(0,0,0,.35)}
.site-header.is-scrolled .header-row{min-height:60px}
.brand-mark{transition:width .25s ease,height .25s ease}
.site-header.is-scrolled .brand-mark{width:34px;height:34px}

/* Активный раздел в меню */
.nav a{position:relative}
.nav a::after{content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;background:var(--volt);transform:scaleX(0);transform-origin:left;transition:transform .3s ease}
.nav a.is-active{color:#fff}
.nav a.is-active::after{transform:scaleX(1)}

/* Адаптив */
@media (max-width:1180px){
  .nav{gap:20px;font-size:14px}
}
@media (max-width:1080px){
  .nav{display:none}
  .hero-grid{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr)}
  .steps{grid-template-columns:repeat(3,minmax(0,1fr));row-gap:32px}
}
@media (max-width:860px){
  .hero-grid,.section-head,.about-grid,.production,.contacts-grid{grid-template-columns:1fr}
  .production{padding:28px 24px}
  .hero-art{display:none}
  .hv-grid,.cards{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr}
  .section{padding:72px 0}
}
@media (max-width:600px){
  body{font-size:16px}
  .header-row{min-height:64px}
  .icon-btn{display:none}
  .phone-pill{padding:0 14px;font-size:14px}
  .brand-name{font-size:18px}
  .hero{padding:40px 0 56px}
  .hero-facts{grid-template-columns:1fr;gap:16px}
  .hv-grid,.cards,.steps,.contact-list,.facts{grid-template-columns:1fr}
  .map{height:300px}
  .big-phone{white-space:normal}
  .lead{font-size:17px}
}