/* ===== Рубеж Энерго — фирменный стиль ===== */
:root{
  --ink:#0B0D10;
  --graphite:#14171C;
  --steel:#232830;
  --line:#E3E6EA;
  --muted:#6B737E;
  --bg:#FFFFFF;
  --bg-soft:#F5F6F8;
  --gold-1:#E7C173;
  --gold-2:#C8912F;
  --gold-3:#95661B;
  --gold-grad:linear-gradient(135deg,var(--gold-1) 0%,var(--gold-2) 45%,var(--gold-3) 100%);
  --radius:14px;
  --radius-lg:22px;
  --shadow:0 18px 50px -20px rgba(11,13,16,.35);
  --wrap:1220px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:'Manrope',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif;
  font-size:17px;line-height:1.6;font-weight:400;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;line-height:1.1;font-weight:800;letter-spacing:-.02em}
h1{font-size:clamp(2.1rem,5.2vw,4.1rem)}
h2{font-size:clamp(1.7rem,3.6vw,2.9rem)}
h3{font-size:clamp(1.15rem,1.9vw,1.45rem);letter-spacing:-.01em}
p{margin:0 0 1em}
.wrap{width:min(100% - 40px,var(--wrap));margin-inline:auto}
.gold-text{background:var(--gold-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.section{padding:clamp(60px,8vw,110px) 0}
.section--soft{background:var(--bg-soft)}
.section--dark{background:var(--ink);color:#fff}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:.75rem;font-weight:800;letter-spacing:.16em;text-transform:uppercase;
  color:var(--gold-3);margin-bottom:18px;
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--gold-grad);border-radius:2px}
.section--dark .eyebrow{color:var(--gold-1)}
.lead{font-size:clamp(1.02rem,1.5vw,1.18rem);color:var(--muted);max-width:62ch}
.section--dark .lead{color:#A8B0BC}

/* ===== Кнопки ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:16px 30px;border-radius:999px;font-weight:800;font-size:.97rem;
  border:1.5px solid transparent;cursor:pointer;transition:.25s var(--ease);
  letter-spacing:-.01em;white-space:nowrap;font-family:inherit;
}
.btn--gold{background:var(--gold-grad);color:#1A1204;box-shadow:0 12px 30px -12px rgba(200,145,47,.75)}
.btn--gold:hover{transform:translateY(-2px);box-shadow:0 18px 40px -12px rgba(200,145,47,.9)}
.btn--ghost{border-color:rgba(255,255,255,.28);color:#fff}
.btn--ghost:hover{border-color:var(--gold-1);color:var(--gold-1)}
.btn--dark{background:var(--ink);color:#fff}
.btn--dark:hover{transform:translateY(-2px);background:var(--steel)}
.btn--outline{border-color:var(--line);color:var(--ink);background:#fff}
.btn--outline:hover{border-color:var(--gold-2);color:var(--gold-3)}
.btn--lg{padding:19px 38px;font-size:1.03rem}

/* ===== Шапка ===== */
.header{
  position:sticky;top:0;z-index:100;background:rgba(255,255,255,.94);
  backdrop-filter:saturate(160%) blur(14px);border-bottom:1px solid var(--line);
  transition:.3s var(--ease);
}
.header__bar{display:flex;align-items:center;gap:22px;height:82px}
.logo{display:flex;align-items:center;gap:13px;min-width:0}
.logo>span:last-child{display:flex;flex-direction:column;min-width:0}
.logo svg{width:42px;height:42px;flex-shrink:0}
.logo__name{display:block;font-weight:800;font-size:1.08rem;letter-spacing:-.02em;line-height:1.05;white-space:nowrap}
.logo__name span{background:var(--gold-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.logo__tag{display:block;font-size:.58rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);font-weight:700;margin-top:3px;line-height:1.25;white-space:nowrap}
.nav{display:flex;align-items:center;gap:19px;margin-left:auto}
.nav a{font-size:.875rem;font-weight:600;white-space:nowrap;color:var(--steel);transition:color .2s;position:relative;padding:6px 0}
.nav a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--gold-grad);transition:width .25s var(--ease)}
.nav a:hover{color:var(--ink)}
.nav a:hover::after,.nav a.is-active::after{width:100%}
.nav a.is-active{color:var(--ink)}
.header__cta{display:flex;align-items:center;gap:15px;flex-shrink:0}
.header__phone{font-weight:800;font-size:1rem;letter-spacing:-.01em;white-space:nowrap}
.header__phone small{display:block;font-size:.66rem;font-weight:600;color:var(--muted);letter-spacing:.04em}
.burger{display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:11px;cursor:pointer;padding:0;align-items:center;justify-content:center;margin-left:auto}
.burger span{display:block;width:19px;height:2px;background:var(--ink);position:relative;transition:.25s}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:19px;height:2px;background:var(--ink);transition:.25s}
.burger span::before{top:-6px}.burger span::after{top:6px}
.burger.is-open span{background:transparent}
.burger.is-open span::before{top:0;transform:rotate(45deg)}
.burger.is-open span::after{top:0;transform:rotate(-45deg)}

/* ===== Hero ===== */
.hero{position:relative;background:var(--ink);color:#fff;overflow:hidden;padding:clamp(70px,9vw,120px) 0 clamp(60px,7vw,100px)}
.hero__grid-bg{position:absolute;inset:0;opacity:.5;pointer-events:none}
.hero__glow{position:absolute;width:760px;height:760px;right:-240px;top:-300px;border-radius:50%;
  background:radial-gradient(circle,rgba(200,145,47,.28) 0%,rgba(200,145,47,0) 66%);pointer-events:none}
.hero__inner{position:relative;z-index:2;display:grid;grid-template-columns:1.12fr .88fr;gap:60px;align-items:center}
.hero h1{margin-bottom:24px}
.hero h1 em{font-style:normal;background:var(--gold-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero__sub{font-size:clamp(1.02rem,1.6vw,1.2rem);color:#A8B0BC;max-width:56ch;margin-bottom:34px}
.hero__actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:46px}
.hero__stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;border-top:1px solid rgba(255,255,255,.12);padding-top:30px}
.stat__num{font-size:clamp(1.7rem,3vw,2.4rem);font-weight:800;letter-spacing:-.03em;line-height:1;
  background:var(--gold-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat__label{font-size:.82rem;color:#A8B0BC;margin-top:7px;line-height:1.35}
.hero__card{
  background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  border:1px solid rgba(255,255,255,.13);border-radius:var(--radius-lg);padding:30px;
  backdrop-filter:blur(8px);
}
.hero__card h3{margin-bottom:6px;font-size:1.22rem}
.hero__card p{color:#A8B0BC;font-size:.9rem;margin-bottom:20px}

/* ===== Формы ===== */
.form{display:grid;gap:12px}
.form input,.form textarea,.form select{
  width:100%;padding:15px 17px;border-radius:12px;border:1px solid var(--line);
  background:#fff;color:var(--ink);font-family:inherit;font-size:.95rem;transition:.2s;
}
.hero__card .form input,.hero__card .form textarea,.hero__card .form select{
  background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.16);color:#fff;
}
.hero__card .form input::placeholder,.hero__card .form textarea::placeholder{color:#8B93A0}
.form input:focus,.form textarea:focus,.form select:focus{outline:none;border-color:var(--gold-2);box-shadow:0 0 0 3px rgba(200,145,47,.16)}
.form textarea{resize:vertical;min-height:96px}
.form__note{font-size:.72rem;color:var(--muted);line-height:1.45}
.hero__card .form__note{color:#8B93A0}
.form__note a{text-decoration:underline}
.form__status{font-size:.88rem;font-weight:700;padding:11px 15px;border-radius:11px;display:none}
.form__status.is-ok{display:block;background:rgba(46,160,80,.12);color:#1F8A46;border:1px solid rgba(46,160,80,.3)}
.form__status.is-err{display:block;background:rgba(214,60,60,.1);color:#C43A3A;border:1px solid rgba(214,60,60,.28)}

/* ===== Сетки карточек ===== */
.grid{display:grid;gap:24px}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}
.grid--2{grid-template-columns:repeat(2,1fr)}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:32px;
  transition:.3s var(--ease);position:relative;overflow:hidden;
}
.card::after{content:"";position:absolute;left:0;top:0;height:3px;width:0;background:var(--gold-grad);transition:width .35s var(--ease)}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:transparent}
.card:hover::after{width:100%}
.card__icon{width:52px;height:52px;border-radius:14px;background:var(--gold-grad);display:flex;align-items:center;justify-content:center;margin-bottom:20px}
.card__icon svg{width:26px;height:26px;stroke:#1A1204;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.card h3{margin-bottom:10px}
.card p{color:var(--muted);font-size:.94rem;margin-bottom:0}
.card__link{display:inline-flex;align-items:center;gap:7px;margin-top:18px;font-weight:800;font-size:.9rem;color:var(--gold-3)}
.card__link::after{content:"→";transition:transform .25s}
.card:hover .card__link::after{transform:translateX(4px)}

/* ===== Секция-заголовок ===== */
.sec-head{max-width:760px;margin-bottom:50px}
.sec-head--center{margin-inline:auto;text-align:center}
.sec-head h2{margin-bottom:16px}

/* ===== Таблица продукции ===== */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-lg);background:#fff}
table{width:100%;border-collapse:collapse;min-width:560px}
th,td{padding:15px 20px;text-align:left;border-bottom:1px solid var(--line);font-size:.93rem}
th{background:var(--bg-soft);font-weight:800;font-size:.78rem;letter-spacing:.07em;text-transform:uppercase;color:var(--steel);white-space:nowrap}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:#FCFAF6}
td strong{font-weight:800}

/* ===== Процесс ===== */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:s}
.step{position:relative;padding-top:52px}
.step::before{
  counter-increment:s;content:counter(s,decimal-leading-zero);
  position:absolute;top:0;left:0;font-size:2.1rem;font-weight:800;letter-spacing:-.04em;
  background:var(--gold-grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.step::after{content:"";position:absolute;top:22px;left:56px;right:-22px;height:1px;background:var(--line)}
.step:last-child::after{display:none}
.section--dark .step::after{background:rgba(255,255,255,.14)}
.step h3{font-size:1.06rem;margin-bottom:8px}
.step p{font-size:.9rem;color:var(--muted);margin:0}
.section--dark .step p{color:#A8B0BC}

/* ===== Преимущества (тёмная лента) ===== */
.feature-row{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius-lg);overflow:hidden}
.feature{background:var(--ink);padding:32px 26px}
.feature__icon{width:34px;height:34px;margin-bottom:16px;stroke:var(--gold-1);fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.feature h3{font-size:1.02rem;margin-bottom:8px}
.feature p{font-size:.87rem;color:#A8B0BC;margin:0}

/* ===== CTA-лента ===== */
.cta{position:relative;background:var(--graphite);color:#fff;border-radius:var(--radius-lg);padding:clamp(38px,5vw,62px);overflow:hidden}
.cta__glow{position:absolute;width:520px;height:520px;right:-180px;bottom:-260px;border-radius:50%;
  background:radial-gradient(circle,rgba(200,145,47,.26) 0%,rgba(200,145,47,0) 68%)}
.cta__inner{position:relative;z-index:2;display:grid;grid-template-columns:1.25fr .75fr;gap:44px;align-items:center}
.cta h2{margin-bottom:14px}
.cta p{color:#A8B0BC;margin-bottom:0}
.cta__actions{display:flex;flex-direction:column;gap:12px}

/* ===== Реквизиты ===== */
.req{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.req__block{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden}
.req__head{background:var(--ink);color:#fff;padding:17px 24px;font-weight:800;font-size:.95rem;display:flex;align-items:center;gap:11px}
.req__head svg{width:19px;height:19px;stroke:var(--gold-1);fill:none;stroke-width:1.8}
.req__body{padding:8px 24px 20px}
.req__row{display:flex;justify-content:space-between;gap:18px;padding:13px 0;border-bottom:1px solid var(--line);font-size:.92rem}
.req__row:last-child{border-bottom:none}
.req__row dt{color:var(--muted);flex-shrink:0}
.req__row dd{margin:0;font-weight:700;text-align:right;word-break:break-word}

/* ===== Футер ===== */
.footer{background:var(--ink);color:#fff;padding:70px 0 0}
.footer__top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:50px}
.footer__about{font-size:.9rem;color:#A8B0BC;margin:18px 0 0;max-width:34ch}
.footer .logo__tag{color:#8B93A0}
.footer h4{font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--gold-1);margin:0 0 18px;font-weight:800}
.footer ul{list-style:none;margin:0;padding:0;display:grid;gap:11px}
.footer ul a{font-size:.91rem;color:#A8B0BC;transition:color .2s}
.footer ul a:hover{color:var(--gold-1)}
.footer__contact{font-size:.91rem;color:#A8B0BC;display:grid;gap:12px}
.footer__contact a{font-weight:700;color:#fff;font-size:1.02rem}
.footer__bottom{border-top:1px solid rgba(255,255,255,.12);padding:24px 0;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:.8rem;color:#8B93A0}
.footer__bottom a:hover{color:var(--gold-1)}

/* ===== Хлебные крошки ===== */
.crumbs{font-size:.8rem;color:#8B93A0;padding:20px 0 0;display:flex;gap:9px;flex-wrap:wrap;position:relative;z-index:2}
.crumbs a:hover{color:var(--gold-1)}
.crumbs span{opacity:.5}

/* ===== Внутренний hero ===== */
.page-hero{background:var(--ink);color:#fff;position:relative;overflow:hidden;padding-bottom:clamp(46px,6vw,74px)}
.page-hero__inner{position:relative;z-index:2;padding-top:34px;max-width:860px}
.page-hero h1{margin-bottom:18px}

/* ===== FAQ ===== */
.faq{display:grid;gap:12px;max-width:880px;margin-inline:auto}
.faq__item{border:1px solid var(--line);border-radius:var(--radius);background:#fff;overflow:hidden}
.faq__q{width:100%;text-align:left;padding:20px 24px;background:none;border:none;font-family:inherit;
  font-size:1rem;font-weight:800;cursor:pointer;display:flex;justify-content:space-between;gap:18px;align-items:center;color:var(--ink);letter-spacing:-.01em}
.faq__q::after{content:"+";font-size:1.4rem;font-weight:400;color:var(--gold-2);transition:transform .25s;flex-shrink:0;line-height:1}
.faq__item.is-open .faq__q::after{transform:rotate(45deg)}
.faq__a{max-height:0;overflow:hidden;transition:max-height .35s var(--ease)}
.faq__a p{padding:0 24px 22px;margin:0;color:var(--muted);font-size:.94rem}

/* ===== Анимация появления ===== */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ===== Плавающая кнопка звонка ===== */
.fab{position:fixed;right:20px;bottom:20px;z-index:90;display:none;width:58px;height:58px;border-radius:50%;
  background:var(--gold-grad);align-items:center;justify-content:center;box-shadow:0 14px 34px -10px rgba(200,145,47,.85)}
.fab svg{width:25px;height:25px;stroke:#1A1204;fill:none;stroke-width:2}

/* ===== Адаптив ===== */
@media (max-width:1620px){
  .header .logo__tag{display:none}
  .nav{gap:15px}
  .nav a{font-size:.83rem}
  .header__cta .btn{padding:14px 20px;font-size:.88rem}
}
@media (max-width:1080px){
  .hero__inner{grid-template-columns:1fr;gap:44px}
  .grid--4{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr);gap:30px}
  .step::after{display:none}
  .feature-row{grid-template-columns:repeat(2,1fr)}
  .footer__top{grid-template-columns:repeat(2,1fr);gap:34px}
}
@media (max-width:860px){
  .nav{
    position:fixed;inset:82px 0 auto;background:#fff;flex-direction:column;align-items:stretch;
    gap:0;padding:14px 20px 26px;border-bottom:1px solid var(--line);
    transform:translateY(-130%);transition:transform .32s var(--ease);box-shadow:var(--shadow);margin-left:0;
  }
  .nav.is-open{transform:none}
  .nav a{padding:15px 0;border-bottom:1px solid var(--line);font-size:1rem}
  .nav a::after{display:none}
  .burger{display:flex}
  .header__cta{display:none}
  .cta__inner{grid-template-columns:1fr;gap:28px}
  .req{grid-template-columns:1fr}
  .fab{display:flex}
  body{padding-bottom:0}
}
@media (max-width:620px){
  body{font-size:16px}
  .grid--3,.grid--4,.grid--2{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .feature-row{grid-template-columns:1fr}
  .footer__top{grid-template-columns:1fr}
  .hero__stats{grid-template-columns:1fr;gap:20px}
  .card{padding:26px}
  .hero__actions .btn{width:100%}
}

/* ===== Доступность ===== */
.card:has(> a[style*="absolute"]){cursor:pointer}
a,button,input,textarea,select,summary{outline-offset:3px}
a:focus-visible,button:focus-visible,input:focus-visible,
textarea:focus-visible,select:focus-visible,.faq__q:focus-visible{
  outline:3px solid var(--gold-2);border-radius:6px;
}
.section--dark a:focus-visible,.hero a:focus-visible,
.page-hero a:focus-visible,.cta a:focus-visible,.footer a:focus-visible{outline-color:var(--gold-1)}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;animation-iteration-count:1 !important;
    transition-duration:.01ms !important;scroll-behavior:auto !important;
  }
  .reveal{opacity:1 !important;transform:none !important}
  .btn:hover,.card:hover{transform:none !important}
}