/* ИНТСЭЛ — стили посадочных страниц (электромонтаж, Иваово)
   Бренд: жёлтый #FFCC33, тёмный #1D1D1D. Без JS, адаптив, a11y. */

/* ===== Шрифты (локальные, переиспользуем ассеты сайта) ===== */
@font-face{font-family:'Montserrat';font-weight:400;font-style:normal;font-display:swap;
  src:url('../web/user/fonts/montserrat/montserrat_normal.woff') format('woff'),url('../web/user/fonts/montserrat/montserrat_normal.ttf') format('truetype');}
@font-face{font-family:'Montserrat';font-weight:500;font-style:normal;font-display:swap;
  src:url('../web/user/fonts/montserrat/montserrat_medium.woff') format('woff'),url('../web/user/fonts/montserrat/montserrat_medium.ttf') format('truetype');}
@font-face{font-family:'Montserrat';font-weight:700;font-style:normal;font-display:swap;
  src:url('../web/user/fonts/montserrat/montserrat_bold.woff') format('woff'),url('../web/user/fonts/montserrat/montserrat_bold.ttf') format('truetype');}
@font-face{font-family:'Open Sans';font-weight:400;font-style:normal;font-display:swap;
  src:url('../web/user/fonts/open_sans/open_sans_normal.woff') format('woff'),url('../web/user/fonts/open_sans/open_sans_normal.ttf') format('truetype');}
@font-face{font-family:'Open Sans';font-weight:600;font-style:normal;font-display:swap;
  src:url('../web/user/fonts/open_sans/open_sans_semi-bold.woff') format('woff'),url('../web/user/fonts/open_sans/open_sans_semi-bold.ttf') format('truetype');}

/* ===== Переменные ===== */
:root{
  --yellow:#FFCC33; --yellow-dark:#e6b800; --yellow-soft:#fff8e6; --ink:#1D1D1D; --gray:#777; --line:#e6e6e6;
  --bg-soft:#f7f7f7; --white:#fff; --maxw:1170px; --radius:14px;
  --shadow:0 10px 30px rgba(0,0,0,.10); --shadow-sm:0 4px 14px rgba(0,0,0,.07);
  --font-h:'Montserrat',Arial,sans-serif; --font-b:'Open Sans',Arial,sans-serif;
}

/* ===== База ===== */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font-b);color:var(--ink);background:var(--white);line-height:1.6;font-size:17px}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--font-h);line-height:1.2;margin:0 0 .5em}
h1{font-size:clamp(27px,4vw,42px);font-weight:700;letter-spacing:-.5px}
h2{font-size:clamp(22px,3vw,31px);font-weight:700;letter-spacing:-.3px}
h3{font-size:20px;font-weight:600}
p{margin:0 0 1em}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
:focus-visible{outline:3px solid var(--yellow-dark);outline-offset:2px}
svg{display:block}

/* ===== Кнопки ===== */
.btn{display:inline-block;padding:14px 28px;border-radius:30px;font-family:var(--font-h);font-weight:600;
  font-size:16px;cursor:pointer;border:2px solid transparent;transition:.15s;text-align:center}
.btn--primary{background:var(--yellow);color:var(--ink);box-shadow:0 8px 20px rgba(255,204,51,.4)}
.btn--primary:hover{background:var(--yellow-dark);transform:translateY(-2px)}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn--ghost:hover{background:var(--ink);color:var(--white)}
.btn--block{display:block;width:100%}

/* ===== Шапка ===== */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:saturate(150%) blur(6px);border-bottom:1px solid var(--line)}
.site-header__row{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:70px}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--font-h);font-weight:700;font-size:20px}
.logo img{height:40px;width:auto;border-radius:6px}
.nav{display:flex;align-items:center;gap:6px}
.nav a{padding:10px 14px;border-radius:10px;font-family:var(--font-h);font-weight:500;font-size:15px;transition:.15s}
.nav a:hover,.nav a[aria-current="page"]{background:rgba(29,29,29,.08)}
.has-sub{position:relative}
.has-sub>.sub{position:absolute;left:0;top:100%;background:var(--white);border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--shadow);min-width:280px;padding:8px;display:none;flex-direction:column}
.has-sub:hover>.sub,.has-sub:focus-within>.sub{display:flex}
.sub a{font-weight:400;font-family:var(--font-b);font-size:15px}
.header__phone{font-family:var(--font-h);font-weight:700;font-size:17px;white-space:nowrap}
.nav-toggle,.nav-toggle-label{display:none}

/* ===== Хлебные крошки ===== */
.breadcrumbs{font-size:14px;color:var(--gray);padding:14px 0}
.breadcrumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0}
.breadcrumbs li::after{content:'/';margin-left:6px;color:var(--line)}
.breadcrumbs li:last-child::after{content:''}
.breadcrumbs a:hover{color:var(--ink)}

/* ===== Hero ===== */
.hero{position:relative;overflow:hidden;padding:36px 0 56px;
  background:radial-gradient(circle at 85% -20%,#fff1c2 0%,rgba(255,241,194,0) 45%),linear-gradient(180deg,#fffaf0,#fff)}
.hero::before{content:'';position:absolute;inset:0;z-index:0;pointer-events:none;
  background-image:radial-gradient(rgba(29,29,29,.05) 1px,transparent 1px);background-size:24px 24px;
  -webkit-mask-image:linear-gradient(180deg,#000,transparent);mask-image:linear-gradient(180deg,#000,transparent)}
.hero>.container{position:relative;z-index:1}
.hero__inner{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.hero__geo{display:inline-block;background:var(--yellow);color:var(--ink);font-family:var(--font-h);font-weight:600;
  font-size:14px;padding:5px 14px;border-radius:20px;margin-bottom:16px}
.hero p.lead{font-size:19px;max-width:760px}
.hero__cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:22px}
.hero__media{position:relative}
.hero__media::before{content:'';position:absolute;right:-16px;bottom:-16px;width:62%;height:74%;
  background:var(--yellow);border-radius:18px;z-index:0}
.hero__media img{position:relative;z-index:1;width:100%;aspect-ratio:3/2;object-fit:cover;
  border-radius:18px;box-shadow:var(--shadow)}

/* ===== Полоса преимуществ (иконки) ===== */
.features-section{padding:26px 0;border-bottom:1px solid var(--line)}
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.feature{display:flex;align-items:center;gap:12px;font-family:var(--font-h);font-weight:600;font-size:15px}
.feature__icon{flex:0 0 auto;width:46px;height:46px;border-radius:12px;background:var(--yellow-soft);
  display:flex;align-items:center;justify-content:center}
.feature__icon svg{width:24px;height:24px;stroke:var(--ink)}

/* ===== Секции ===== */
.section{padding:52px 0}
.section--soft{background:var(--bg-soft)}
.section__lead{max-width:760px;color:#444}

/* ===== Сетка карточек ===== */
.grid{display:grid;gap:22px}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px;
  position:relative;overflow:hidden;transition:transform .2s,box-shadow .2s}
.card::before{content:'';position:absolute;left:0;top:0;width:100%;height:4px;background:var(--yellow);
  transform:scaleX(0);transform-origin:left;transition:transform .25s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.card:hover::before{transform:scaleX(1)}
.card h3{margin-top:0}
.card--soft{background:var(--bg-soft);border-color:transparent}
.card__icon{display:inline-flex;width:50px;height:50px;border-radius:13px;background:var(--yellow-soft);
  align-items:center;justify-content:center;margin-bottom:14px}
.card__icon svg{width:28px;height:28px;stroke:var(--ink)}

/* ===== Фото в контенте ===== */
.media-figure{margin:0;border-radius:16px;overflow:hidden;box-shadow:var(--shadow);background:#fff}
.media-figure img{width:100%;display:block;aspect-ratio:16/9;object-fit:cover}
.media-figure figcaption{padding:11px 16px;font-size:13px;color:var(--gray)}

/* ===== Списки с галочками ===== */
.checklist{list-style:none;padding:0;margin:0}
.checklist li{position:relative;padding:8px 0 8px 34px}
.checklist li::before{content:'';position:absolute;left:0;top:11px;width:20px;height:20px;border-radius:50%;
  background:var(--yellow);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231D1D1D' stroke-width='3'%3E%3Cpath d='M5 12l5 5L20 6'/%3E%3C/svg%3E");
  background-size:13px;background-position:center;background-repeat:no-repeat}

/* ===== Шаги ===== */
.steps{counter-reset:step;display:grid;gap:18px}
.steps li{list-style:none;position:relative;padding:20px 20px 20px 74px;background:var(--bg-soft);border-radius:var(--radius);
  transition:transform .2s}
.steps li:hover{transform:translateX(4px)}
.steps li::before{counter-increment:step;content:counter(step);position:absolute;left:18px;top:50%;transform:translateY(-50%);
  width:40px;height:40px;background:var(--yellow);color:var(--ink);font-family:var(--font-h);font-weight:700;
  border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 10px rgba(255,204,51,.5)}

/* ===== Форма заявки ===== */
.lead-form{background:var(--ink);color:var(--white);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow);
  position:sticky;top:90px}
.lead-form h2,.lead-form h3{color:var(--white)}
.lead-form .field{margin-bottom:14px}
.lead-form label{display:block;font-size:14px;margin-bottom:6px}
.lead-form input{width:100%;padding:14px 16px;border-radius:12px;border:1px solid #444;background:#fff;color:var(--ink);font-size:16px}
.lead-form input:focus{border-color:var(--yellow)}
.lead-form .consent{font-size:12px;color:#bbb;margin-top:10px}
.lead-form .consent a{color:var(--yellow);text-decoration:underline}
.split{display:grid;grid-template-columns:1.2fr .8fr;gap:36px;align-items:start}

/* ===== CTA-полоса ===== */
.cta-band{background:linear-gradient(135deg,var(--yellow),#ffd95e);border-radius:var(--radius);padding:38px;text-align:center;
  position:relative;overflow:hidden}
.cta-band::after{content:'';position:absolute;right:-40px;top:-40px;width:160px;height:160px;border-radius:50%;
  background:rgba(255,255,255,.25)}
.cta-band h2{margin-top:0;position:relative}
.cta-band p{position:relative}
.cta-band .hero__cta{position:relative}
.cta-band .btn--primary{background:var(--ink);color:var(--white);box-shadow:0 8px 20px rgba(0,0,0,.2)}
.cta-band .btn--primary:hover{background:#000}

/* ===== FAQ ===== */
.faq details{border:1px solid var(--line);border-radius:var(--radius);padding:0;margin-bottom:14px;background:var(--white);
  transition:box-shadow .2s}
.faq details[open]{box-shadow:var(--shadow-sm)}
.faq summary{cursor:pointer;padding:18px 22px;font-family:var(--font-h);font-weight:600;font-size:17px;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:'+';font-size:26px;color:var(--yellow-dark);transition:transform .2s;line-height:1}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details>div{padding:0 22px 20px}

/* ===== Подвал ===== */
.site-footer{background:var(--ink);color:#cfcfcf;padding:46px 0 24px;margin-top:40px;font-size:15px;
  border-top:4px solid var(--yellow)}
.site-footer a{color:#cfcfcf}.site-footer a:hover{color:var(--yellow)}
.footer__cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
.site-footer h4{color:#fff;font-size:16px;margin:0 0 12px}
.footer__nap p{margin:.2em 0}
.footer__contacts a{display:block;margin:.3em 0}
.footer__bottom{border-top:1px solid #333;margin-top:28px;padding-top:16px;font-size:13px;color:#888;
  display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between}

/* ===== Адаптив ===== */
@media(max-width:900px){
  .hero__inner{grid-template-columns:1fr;gap:28px}
  .hero__media{max-width:560px}
  .grid--3{grid-template-columns:repeat(2,1fr)}
  .features{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr}
  .lead-form{position:static}
  .footer__cols{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  .grid--3,.grid--2{grid-template-columns:1fr}
  .features{grid-template-columns:1fr}
  .footer__cols{grid-template-columns:1fr}
  .header__phone{display:none}
  /* Мобильное меню на чистом CSS (чекбокс) */
  .nav-toggle-label{display:inline-flex;flex-direction:column;gap:5px;cursor:pointer;padding:10px}
  .nav-toggle-label span{width:26px;height:3px;background:var(--ink);border-radius:2px}
  .nav{position:fixed;inset:70px 0 auto 0;background:var(--white);flex-direction:column;align-items:stretch;
    gap:0;border-bottom:1px solid var(--line);box-shadow:var(--shadow);padding:10px;display:none}
  .nav-toggle:checked~.nav{display:flex}
  .nav a{padding:14px}
  .has-sub>.sub{position:static;display:flex;box-shadow:none;border:none;border-left:2px solid var(--yellow);
    border-radius:0;margin:0 0 0 12px;padding:0}
}