/* ============================================================
   Энергокруг — стили сайта
   ============================================================ */

:root{
  --accent:#f04823;
  --accent-dark:#d13a18;
  --accent-soft:#fff1ed;
  --ink:#11161d;
  --ink-2:#2a323d;
  --muted:#5c6673;
  --line:#e4e8ee;
  --bg:#ffffff;
  --bg-soft:#f6f7f9;
  --bg-dark:#111820;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 1px 2px rgba(17,22,29,.05), 0 8px 24px rgba(17,22,29,.06);
  --shadow-lg:0 2px 4px rgba(17,22,29,.06), 0 18px 44px rgba(17,22,29,.10);
  --wrap:1180px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);
  font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-decoration:none}
a:hover{color:var(--accent-dark)}
h1,h2,h3,h4{line-height:1.2;margin:0 0 .5em;font-weight:700;letter-spacing:-.015em}
h1{font-size:clamp(2rem,4.2vw,3.1rem)}
h2{font-size:clamp(1.5rem,2.9vw,2.15rem)}
h3{font-size:1.2rem}
p{margin:0 0 1.1em}
ul{margin:0 0 1.1em;padding-left:1.3em}
li{margin-bottom:.4em}
hr{border:0;border-top:1px solid var(--line);margin:2.5rem 0}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.section{padding:clamp(48px,7vw,88px) 0}
.section--soft{background:var(--bg-soft)}
.section--tight{padding:clamp(36px,5vw,60px) 0}
.lead{font-size:1.15rem;color:var(--muted)}
.muted{color:var(--muted)}
.center{text-align:center}
.mw-720{max-width:720px}
.mw-820{max-width:820px}

.eyebrow{
  display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.13em;
  text-transform:uppercase;color:var(--accent);margin-bottom:14px;
}
.section-head{margin-bottom:clamp(28px,4vw,48px)}
.section-head p{max-width:680px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;justify-content:center;
  padding:13px 26px;border-radius:100px;font-weight:600;font-size:.98rem;
  border:1.5px solid transparent;cursor:pointer;transition:.18s ease;
  text-decoration:none;white-space:nowrap;
}
.btn--primary{background:var(--accent);color:#fff}
.btn--primary:hover{background:var(--accent-dark);color:#fff;transform:translateY(-1px)}
.btn--ghost{border-color:var(--line);color:var(--ink);background:#fff}
.btn--ghost:hover{border-color:var(--ink);color:var(--ink)}
.btn--light{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.28)}
.btn--light:hover{background:#fff;color:var(--ink)}
.btn--sm{padding:9px 18px;font-size:.9rem}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}

/* ---------- header ---------- */
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header__in{display:flex;align-items:center;gap:28px;height:76px}
.header__logo img{height:34px;width:auto}
.nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav a{
  color:var(--ink-2);font-weight:500;font-size:.97rem;padding:9px 14px;
  border-radius:8px;transition:.15s;
}
.nav a:hover{background:var(--bg-soft);color:var(--ink)}
.nav a.is-active{color:var(--accent)}
.header__contact{display:flex;align-items:center;gap:18px;margin-left:8px}
.header__phone{font-weight:700;color:var(--ink);font-size:1rem;white-space:nowrap}
.header__phone span{display:block;font-size:.72rem;font-weight:500;color:var(--muted);letter-spacing:.02em}
.burger{display:none;margin-left:auto;background:none;border:0;padding:10px;cursor:pointer}
.burger span{display:block;width:22px;height:2px;background:var(--ink);margin:5px 0;transition:.2s}
.is-open .burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.is-open .burger span:nth-child(2){opacity:0}
.is-open .burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#fff 0%,var(--bg-soft) 100%)}
.hero__in{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;padding:clamp(44px,6vw,84px) 0}
.hero h1{margin-bottom:20px}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero__text{font-size:1.16rem;color:var(--muted);max-width:520px}
.hero__media{position:relative}
.hero__media img{border-radius:var(--radius);box-shadow:var(--shadow-lg);width:100%;height:clamp(300px,34vw,420px);object-fit:cover;object-position:72% 50%}
.hero__badge{
  position:absolute;left:-14px;bottom:-14px;background:#fff;border-radius:var(--radius-sm);
  box-shadow:var(--shadow);padding:12px 18px;display:flex;align-items:center;gap:10px;font-weight:600;font-size:.9rem;
}
.hero__badge b{color:var(--accent)}

/* ---------- facts ---------- */
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border-radius:var(--radius);overflow:hidden}
.fact{background:#fff;padding:26px 22px}
.fact b{display:block;font-size:1.9rem;line-height:1.1;color:var(--accent);letter-spacing:-.02em}
.fact span{display:block;margin-top:6px;color:var(--muted);font-size:.93rem;line-height:1.4}

/* ---------- grid / cards ---------- */
.grid{display:grid;gap:22px}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}

.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;transition:.18s ease;display:flex;flex-direction:column;align-items:stretch;
}
.card > img{align-self:flex-start}
.card:hover{box-shadow:var(--shadow);transform:translateY(-2px);border-color:#d8dee7}
.card h3{margin-bottom:8px}
.card p{color:var(--muted);font-size:.97rem;margin-bottom:0}
.card__foot{margin-top:auto;padding-top:18px}

/* product card */
.pcard{position:relative;overflow:hidden}
.pcard::before{content:"";position:absolute;inset:0 auto 0 0;width:4px;background:var(--c,var(--accent))}
.pcard__logo{height:34px;width:auto;max-width:100%;object-fit:contain;object-position:left center;align-self:flex-start;margin-bottom:18px}
.tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:16px}
.tag{font-size:.78rem;font-weight:600;padding:4px 10px;border-radius:100px;background:var(--bg-soft);color:var(--muted)}
.pcard__link{display:inline-flex;align-items:center;gap:7px;font-weight:600;font-size:.94rem;color:var(--c,var(--accent))}
.pcard__link:hover{color:var(--c,var(--accent));gap:11px}

/* numbered advantage */
.adv{display:flex;gap:16px;align-items:flex-start}
.adv__n{
  flex:none;width:38px;height:38px;border-radius:10px;background:var(--accent-soft);color:var(--accent);
  display:grid;place-items:center;font-weight:700;font-size:.95rem;
}
.adv h3{font-size:1.05rem;margin-bottom:4px}
.adv p{font-size:.95rem;color:var(--muted);margin:0}

/* ---------- split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,60px);align-items:center}
.split img{border-radius:var(--radius);box-shadow:var(--shadow)}
.split--rev .split__media{order:2}

/* ---------- breadcrumbs / page head ---------- */
.crumbs{font-size:.87rem;color:var(--muted);padding:20px 0 0}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--accent)}
.crumbs span{padding:0 7px;opacity:.5}
.phead{padding:26px 0 clamp(28px,4vw,44px);border-bottom:1px solid var(--line)}
.phead h1{margin-bottom:14px}
.phead p{max-width:760px;color:var(--muted);font-size:1.1rem;margin:0}

/* ---------- docs ---------- */
.docs + .section-head{margin-top:56px}
.docs{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.doc{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.18s;display:flex;flex-direction:column}
.doc__body{margin-top:auto}
.doc:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.doc__img{background:var(--bg-soft);padding:18px;display:grid;place-items:center;min-height:220px}
.doc__img img{max-height:250px;width:auto;box-shadow:0 2px 12px rgba(0,0,0,.10)}
.doc__body{padding:18px 20px 22px}
.doc__body b{display:block;font-size:.97rem;line-height:1.35;margin-bottom:6px;color:var(--ink)}
.doc__body span{font-size:.85rem;color:var(--muted);line-height:1.45;display:block}

/* ---------- partners ---------- */
.plogo{
  display:grid;place-items:center;height:88px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-sm);padding:16px;margin-bottom:18px;
}
.plogo img{max-height:52px;width:auto;object-fit:contain}

/* ---------- articles ---------- */
.art{display:grid;grid-template-columns:200px 1fr;gap:26px;padding:28px 0;border-bottom:1px solid var(--line)}
.art:first-of-type{border-top:1px solid var(--line)}
.art__meta{font-size:.88rem;color:var(--muted)}
.art__meta b{display:block;color:var(--ink);font-weight:600;margin-bottom:4px}
.art h3{margin-bottom:8px;font-size:1.25rem}
.art h3 a{color:var(--ink)}
.art h3 a:hover{color:var(--accent)}
.art p{color:var(--muted);font-size:.98rem;margin-bottom:12px}
.pdf-link{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:.93rem}
.pdf-link::before{
  content:"PDF";font-size:.66rem;letter-spacing:.04em;background:var(--accent);color:#fff;
  padding:3px 6px;border-radius:4px;font-weight:700;
}

/* ---------- offices ---------- */
.office{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.office h3{font-size:1.1rem;margin-bottom:4px}
.office__note{font-size:.85rem;color:var(--accent);font-weight:600;margin-bottom:14px}
.office dl{margin:0;display:grid;grid-template-columns:1fr;gap:12px}
.office dt{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-bottom:2px}
.office dd{margin:0;font-size:.98rem}
.office dd a{color:var(--ink);font-weight:600}
.office dd a:hover{color:var(--accent)}

/* ---------- CTA ---------- */
.cta{background:var(--bg-dark);color:#fff;border-radius:var(--radius);padding:clamp(32px,5vw,56px);text-align:center}
.cta h2{color:#fff;margin-bottom:12px}
.cta p{color:rgba(255,255,255,.72);max-width:560px;margin:0 auto 8px}
.cta .btn-row{justify-content:center}

/* ---------- footer ---------- */
.footer{background:var(--bg-dark);color:rgba(255,255,255,.66);padding:56px 0 28px;font-size:.94rem;margin-top:0}
.footer a{color:rgba(255,255,255,.66)}
.footer a:hover{color:#fff}
.footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:36px}
.footer__logo img{height:32px;width:auto;margin-bottom:16px;opacity:.95}
.footer h4{color:#fff;font-size:.82rem;text-transform:uppercase;letter-spacing:.1em;margin-bottom:16px}
.footer ul{list-style:none;padding:0;margin:0}
.footer li{margin-bottom:9px}
.footer__bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:22px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.86rem}
.footer strong{color:#fff;font-weight:600}

/* ---------- lightbox ---------- */
.lb{position:fixed;inset:0;background:rgba(10,14,19,.92);display:none;place-items:center;z-index:100;padding:28px}
.lb.is-on{display:grid}
.lb img{max-width:min(100%,900px);max-height:90vh;width:auto;border-radius:6px}
.lb__close{position:absolute;top:18px;right:22px;background:none;border:0;color:#fff;font-size:2.2rem;line-height:1;cursor:pointer;opacity:.7}
.lb__close:hover{opacity:1}

/* ---------- 404 ---------- */
.e404{text-align:center;padding:clamp(60px,10vw,120px) 0}
.e404 b{display:block;font-size:clamp(4rem,12vw,8rem);line-height:1;color:var(--accent);letter-spacing:-.04em}

/* ---------- responsive ---------- */
@media (max-width:1000px){
  .grid--4,.docs{grid-template-columns:repeat(2,1fr)}
  .grid--3{grid-template-columns:repeat(2,1fr)}
  .facts{grid-template-columns:repeat(2,1fr)}
  .footer__grid{grid-template-columns:repeat(2,1fr)}
  .hero__in{grid-template-columns:1fr;gap:32px}
  .hero__media{order:-1}
  .split{grid-template-columns:1fr}
  .split--rev .split__media{order:-1}
}
@media (max-width:860px){
  body{font-size:16px}
  .header__in{height:64px;gap:14px}
  .header__contact{display:none}
  .burger{display:block}
  .nav{
    position:fixed;inset:64px 0 auto;background:#fff;flex-direction:column;align-items:stretch;
    gap:0;padding:8px 16px 20px;border-bottom:1px solid var(--line);display:none;
    max-height:calc(100vh - 64px);overflow:auto;
  }
  .is-open .nav{display:flex}
  .nav a{padding:13px 8px;border-bottom:1px solid var(--line);border-radius:0}
  .nav .nav__cta{margin-top:14px;border-bottom:0}
  .nav .btn{width:100%}
}
@media (max-width:620px){
  .grid--2,.grid--3,.grid--4,.docs{grid-template-columns:1fr}
  .facts{grid-template-columns:1fr}
  .art{grid-template-columns:1fr;gap:10px}
  .footer__grid{grid-template-columns:1fr;gap:28px}
  .card{padding:22px}
}

@media print{
  .header,.footer,.cta,.btn{display:none}
  body{font-size:12pt}
}

/* формa обратной связи */
.form{display:grid;gap:16px;grid-template-columns:1fr 1fr;max-width:720px}
.form .field--wide{grid-column:1 / -1}
.form label{display:block;font-size:.85rem;font-weight:600;margin-bottom:6px;color:var(--ink-2)}
.form input,.form textarea{
  width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:var(--radius-sm);
  font:inherit;font-size:.97rem;background:#fff;transition:.15s;
}
.form input:focus,.form textarea:focus{outline:0;border-color:var(--accent)}
.form textarea{min-height:130px;resize:vertical}
.form small{color:var(--muted);font-size:.83rem}
@media (max-width:620px){.form{grid-template-columns:1fr}}

/* ---------- этапы работы ---------- */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:0;position:relative}
.step{position:relative;padding:0 20px 0 0}
.step__n{
  width:44px;height:44px;border-radius:50%;background:#fff;border:2px solid var(--accent);
  color:var(--accent);display:grid;place-items:center;font-weight:700;font-size:1.05rem;
  margin-bottom:18px;position:relative;z-index:2;
}
.step::before{
  content:"";position:absolute;left:44px;top:21px;right:0;height:2px;background:var(--line);z-index:1;
}
.step:last-child::before{display:none}
.step h3{font-size:1.02rem;margin-bottom:6px}
.step p{font-size:.92rem;color:var(--muted);margin:0}
@media (max-width:1000px){
  .steps{grid-template-columns:repeat(2,1fr);gap:28px}
  .step{padding:0}
  .step::before{display:none}
}
@media (max-width:620px){
  .steps{grid-template-columns:1fr;gap:22px}
  .step{display:flex;gap:16px;align-items:flex-start}
  .step__n{flex:none;width:38px;height:38px;font-size:.95rem;margin-bottom:0}
}

/* ---------- кейсы ---------- */
.case{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;
  display:flex;flex-direction:column;
}
.case h3{font-size:1.22rem;margin-bottom:18px}
.case h4{
  font-size:.76rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);
  margin:18px 0 6px;font-weight:700;
}
.case p{font-size:.95rem;color:var(--ink-2);margin:0}
.case__metric{
  display:flex;align-items:baseline;gap:12px;padding:16px 18px;margin-bottom:4px;
  background:var(--accent-soft);border-radius:var(--radius-sm);
}
.case__metric b{font-size:1.8rem;line-height:1;color:var(--accent);letter-spacing:-.02em}
.case__metric span{font-size:.9rem;color:var(--ink-2);font-weight:600}
.case__result{font-weight:600;color:var(--ink)}

/* ---------- клиенты ---------- */
.clients{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.client{
  background:#fff;padding:22px 20px;font-size:.95rem;font-weight:600;color:var(--ink-2);
  display:flex;align-items:center;min-height:96px;line-height:1.4;
}
@media (max-width:1000px){.clients{grid-template-columns:repeat(2,1fr)}}
@media (max-width:620px){.clients{grid-template-columns:1fr}.client{min-height:0}.case{padding:24px}}

/* ---------- продукт без логотипа ---------- */
.pcard__name{
  font-size:1.15rem;color:var(--c,var(--accent));margin:0 0 18px;
  letter-spacing:.01em;
}

/* ---------- таблица характеристик ---------- */
.specs{width:100%;border-collapse:collapse;font-size:.95rem}
.specs td{padding:11px 0;border-bottom:1px solid var(--line);vertical-align:top}
.specs td:first-child{color:var(--muted);padding-right:18px}
.specs td:last-child{text-align:right;white-space:nowrap}
@media (max-width:620px){
  .specs td:last-child{white-space:normal}
}

/* ---------- устройства DevLink ---------- */
.dev{padding:0;overflow:hidden}
.dev__media{background:var(--bg-soft);display:grid;place-items:center;padding:26px;min-height:210px;border-bottom:1px solid var(--line)}
.dev__media img{max-height:170px;width:auto;object-fit:contain;mix-blend-mode:multiply}
.dev__body{padding:26px;display:flex;flex-direction:column;flex:1}
.dev__body h3{margin-bottom:4px}
.dev__sub{color:var(--accent);font-size:.9rem;font-weight:600;margin-bottom:12px}

/* ---------- карточка устройства в списке ---------- */
.dev__link{display:block}
.dev__body h3 a{color:var(--ink)}
.dev__body h3 a:hover{color:var(--accent)}

/* ---------- страница устройства ---------- */
.devpage{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(28px,5vw,56px);align-items:center}
.devpage__media{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);
  display:grid;place-items:center;padding:32px;min-height:300px}
.devpage__media img{max-height:280px;width:auto;object-fit:contain;mix-blend-mode:multiply}
.devpage__media--empty{min-height:220px}
.devpage__head h1{font-size:clamp(1.7rem,3.2vw,2.4rem);margin-bottom:10px}
.devpage__head .lead{margin-bottom:14px}

.devpage__body{max-width:900px}
.spec-block{margin-bottom:clamp(30px,4vw,44px)}
.spec-block:last-child{margin-bottom:0}
.spec-block h2{font-size:1.35rem;margin-bottom:16px}
.spec-block ul{padding-left:1.15em}
.spec-block li{color:var(--ink-2);font-size:.99rem}
.spec-block p{color:var(--ink-2)}
.cols-2{columns:2;column-gap:36px}
.cols-2 li{break-inside:avoid}

.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
.spec-table{width:100%;border-collapse:collapse;font-size:.96rem;min-width:480px}
.spec-table td{padding:13px 20px;border-bottom:1px solid var(--line);vertical-align:top}
.spec-table tr:last-child td{border-bottom:0}
.spec-table td:first-child{color:var(--muted);width:42%}

.dev-nav{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.dev-nav__item{display:block;padding:18px 20px;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:#fff;transition:.16s}
.dev-nav__item:hover{border-color:var(--accent);transform:translateY(-2px)}
.dev-nav__item b{display:block;color:var(--ink);font-size:.98rem;margin-bottom:4px}
.dev-nav__item span{display:block;color:var(--muted);font-size:.87rem;line-height:1.4}

@media (max-width:1000px){
  .devpage{grid-template-columns:1fr}
  .dev-nav{grid-template-columns:1fr}
  .cols-2{columns:1}
}

/* ---------- цена ---------- */
.price{margin:22px 0 4px;font-size:2rem;font-weight:700;color:var(--ink);letter-spacing:-.02em;line-height:1.1}
.price span{font-weight:600;color:var(--muted)}
.price em{display:block;margin-top:8px;font-style:normal;font-size:.85rem;font-weight:400;color:var(--muted);line-height:1.45;max-width:420px}
.price--sm{margin:0;font-size:1.25rem}
.dev__foot{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}

/* ---------- «Контакты» в меню ---------- */
/* на десктопе — обычный пункт меню, акцент держит телефон;
   в мобильном меню — кнопка на всю ширину */
.nav__cta > a{
  color:var(--ink-2);font-weight:500;font-size:.97rem;padding:9px 14px;
  border-radius:8px;transition:.15s;display:inline-block;
}
.nav__cta > a:hover{background:var(--bg-soft);color:var(--ink)}
.nav__cta > a.is-active{color:var(--accent)}

@media (max-width:860px){
  .nav__cta > a{
    display:flex;align-items:center;justify-content:center;
    background:var(--accent);color:#fff;border-radius:100px;
    padding:13px 26px;font-weight:600;width:100%;
  }
  .nav__cta > a:hover,.nav__cta > a.is-active{background:var(--accent-dark);color:#fff}
}

/* телефон в мобильном меню */
.nav__phone{display:none}
@media (max-width:860px){
  .nav__phone{display:block;margin-top:16px;text-align:center}
  .nav__phone a{display:block;padding:0;font-weight:700;font-size:1.1rem;color:var(--ink);border:0}
  .nav__phone a:hover{background:none}
  .nav__phone span{display:block;font-size:.8rem;font-weight:400;color:var(--muted);margin-top:2px}
}