/* ==========================================================================
   Завод ЖБИ · Тучково — плиты оптом
   Фирменный стиль: тёмно-синий #1c244b + оранжевый #f5811f
   ========================================================================== */

:root{
  --navy:#1c244b;
  --navy-2:#232c57;
  --navy-deep:#131a33;
  --orange:#f5811f;
  --orange-d:#e06f0c;
  --ink:#202020;
  --muted:#5b6472;
  --muted-2:#8b93a3;
  --line:#e5e8ee;
  --bg:#ffffff;
  --bg-2:#f4f6f9;
  --radius:14px;
  --shadow:0 18px 44px rgba(20,26,52,.12);
  --shadow-sm:0 6px 20px rgba(20,26,52,.08);
  --wrap:1200px;
  --font:'Montserrat',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  color:var(--ink);
  background:var(--bg);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.section{padding:74px 0}
.section--tight{padding:54px 0}
.section--alt{background:var(--bg-2)}

/* ---------- Заголовки секций ---------- */
.eyebrow{
  display:inline-block;
  font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  color:var(--orange);margin:0 0 12px;
}
.section-title{
  font-size:clamp(26px,3.4vw,40px);
  font-weight:800;line-height:1.12;letter-spacing:-.01em;
  text-transform:uppercase;margin:0 0 14px;color:var(--navy);
}
.section-title--light{color:#fff}
.section-lead{font-size:17px;color:var(--muted);max-width:720px;margin:0 0 40px}
.section-lead--light{color:rgba(255,255,255,.72)}
.center{text-align:center}
.center .section-lead{margin-left:auto;margin-right:auto}

/* ---------- Кнопки ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:15px 30px;border-radius:10px;font-weight:700;font-size:15px;
  border:2px solid transparent;transition:.18s ease;white-space:nowrap;line-height:1;
}
.btn--primary{background:var(--orange);color:#fff}
.btn--primary:hover{background:var(--orange-d);transform:translateY(-2px)}
.btn--ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn--ghost:hover{background:#fff;color:var(--navy);border-color:#fff}
.btn--dark{background:var(--navy);color:#fff}
.btn--dark:hover{background:var(--navy-2)}
.btn--wide{width:100%}
.btn--lg{padding:18px 40px;font-size:16px}

/* ==========================================================================
   Шапка
   ========================================================================== */
.topbar{background:#fff;border-bottom:1px solid var(--line)}
.topbar__in{display:flex;align-items:center;gap:26px;padding:14px 20px;max-width:var(--wrap);margin:0 auto}
.brand{display:flex;align-items:center;gap:14px}
.brand__logo{height:52px;width:auto}
.brand__tag{
  border-left:2px solid var(--line);padding-left:14px;
  font-size:12px;line-height:1.35;color:var(--muted);font-weight:600;max-width:150px;
}
.brand__tag b{color:var(--navy);display:block;font-size:13px;text-transform:uppercase;letter-spacing:.02em}
.topbar__spacer{flex:1}
.topbar__contacts{display:flex;gap:30px;align-items:center}
.tc{display:flex;flex-direction:column;line-height:1.25}
.tc__label{font-size:11px;color:var(--muted-2);text-transform:uppercase;letter-spacing:.05em}
.tc__val{font-size:18px;font-weight:800;color:var(--navy);white-space:nowrap}
.tc__val:hover{color:var(--orange)}
.tc__sub{font-size:12px;color:var(--muted)}
.topbar__cta{display:inline-flex}

/* Навигация */
.nav{background:var(--navy);position:sticky;top:0;z-index:50;box-shadow:0 2px 14px rgba(0,0,0,.16)}
.nav__in{display:flex;align-items:center;max-width:var(--wrap);margin:0 auto;padding:0 20px}
.nav__list{display:flex;list-style:none;margin:0;padding:0;gap:4px;flex:1;flex-wrap:wrap}
.nav__list a{
  display:block;padding:17px 16px;color:rgba(255,255,255,.85);
  font-size:14px;font-weight:600;letter-spacing:.01em;transition:.15s;position:relative;
}
.nav__list a:hover{color:#fff}
.nav__list a::after{content:"";position:absolute;left:16px;right:16px;bottom:10px;height:2px;background:var(--orange);transform:scaleX(0);transition:.2s;transform-origin:left}
.nav__list a:hover::after{transform:scaleX(1)}
.nav__phone{display:none;color:#fff;font-weight:800;font-size:16px;white-space:nowrap;padding-left:16px}
.nav__phone:hover{color:var(--orange)}
.burger{display:none;background:none;border:0;padding:16px 4px;flex-direction:column;gap:5px}
.burger span{width:26px;height:3px;background:#fff;border-radius:2px;transition:.2s}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero{
  position:relative;color:#fff;
  background:linear-gradient(180deg,rgba(19,25,49,.78),rgba(19,25,49,.86)),
    url('../img/photos/background-scaled.jpg') center/cover no-repeat;
}
.hero__in{max-width:var(--wrap);margin:0 auto;padding:78px 20px 66px}
.hero h1{
  font-size:clamp(30px,4.6vw,54px);font-weight:800;line-height:1.08;letter-spacing:-.015em;
  text-transform:uppercase;margin:0 0 22px;max-width:940px;
}
.hero h1 .accent{color:var(--orange)}
.hero__sub{font-size:clamp(17px,2vw,21px);max-width:760px;color:rgba(255,255,255,.85);margin:0 0 34px}
.hero__actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:46px}
.hero__feats{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;border-top:1px solid rgba(255,255,255,.16);padding-top:30px}
.feat{display:flex;gap:14px;align-items:flex-start}
.feat__ico{flex:0 0 44px;width:44px;height:44px;border-radius:9px;background:var(--orange);display:grid;place-items:center}
.feat__ico svg{width:24px;height:24px;stroke:#fff}
.feat b{display:block;font-size:16px;font-weight:700;margin-bottom:2px}
.feat span{font-size:13.5px;color:rgba(255,255,255,.72);line-height:1.4}

/* ==========================================================================
   Преимущества
   ========================================================================== */
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.adv-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 26px;box-shadow:var(--shadow-sm);transition:.2s;
}
.adv-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#d7dce6}
.adv-card__ico{width:56px;height:56px;border-radius:12px;background:rgba(245,129,31,.12);display:grid;place-items:center;margin-bottom:18px}
.adv-card__ico svg{width:30px;height:30px;stroke:var(--orange)}
.adv-card h3{font-size:19px;font-weight:700;margin:0 0 8px;color:var(--navy)}
.adv-card p{margin:0;color:var(--muted);font-size:15px}

/* ==========================================================================
   Продукция
   ========================================================================== */
.products{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.pcard{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:.2s;
}
.pcard:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.pcard__media{
  position:relative;height:210px;display:grid;place-items:center;padding:22px;
  background:radial-gradient(120% 120% at 50% 15%,#eef1f6 0%,#dde3ec 100%);
}
.pcard__media img{max-height:100%;width:auto;filter:drop-shadow(0 16px 22px rgba(28,36,75,.28))}
.pcard__badge{
  position:absolute;top:14px;left:14px;background:var(--navy);color:#fff;
  font-size:12px;font-weight:700;padding:6px 12px;border-radius:20px;letter-spacing:.03em;
}
.pcard__gost{position:absolute;top:14px;right:14px;background:var(--orange);color:#fff;font-size:11px;font-weight:700;padding:6px 11px;border-radius:20px}
.pcard__body{padding:24px 24px 26px;display:flex;flex-direction:column;flex:1}
.pcard h3{font-size:23px;font-weight:800;color:var(--navy);margin:0 0 4px}
.pcard__type{font-size:14px;color:var(--orange);font-weight:600;margin:0 0 16px}
.pspec{list-style:none;margin:0 0 20px;padding:0;display:grid;gap:9px}
.pspec li{display:flex;justify-content:space-between;gap:12px;font-size:14.5px;border-bottom:1px dashed var(--line);padding-bottom:9px}
.pspec li:last-child{border-bottom:0;padding-bottom:0}
.pspec .k{color:var(--muted)}
.pspec .v{font-weight:700;color:var(--navy);text-align:right}
.pcard__foot{margin-top:auto;display:flex;flex-direction:column;gap:12px}
.pcard__price{display:flex;align-items:baseline;gap:8px}
.pcard__price b{font-size:22px;font-weight:800;color:var(--navy)}
.pcard__price span{font-size:13px;color:var(--muted)}

/* ==========================================================================
   Таблица характеристик
   ========================================================================== */
.table-scroll{overflow-x:auto;border-radius:var(--radius);box-shadow:var(--shadow-sm);border:1px solid var(--line)}
table.specs{width:100%;border-collapse:collapse;min-width:640px;background:#fff}
table.specs th,table.specs td{padding:15px 18px;text-align:left;border-bottom:1px solid var(--line);font-size:15px}
table.specs thead th{background:var(--navy);color:#fff;font-weight:700;font-size:14px;text-transform:uppercase;letter-spacing:.03em}
table.specs thead th:first-child{border-top-left-radius:0}
table.specs tbody th{font-weight:700;color:var(--navy);white-space:nowrap}
table.specs tbody tr:nth-child(even){background:var(--bg-2)}
table.specs td.hl{font-weight:700;color:var(--orange)}
table.specs tbody tr:last-child th,table.specs tbody tr:last-child td{border-bottom:0}

/* ==========================================================================
   Тёмные секции (о заводе / преимущества / контакты)
   ========================================================================== */
.dark{background:var(--navy);color:#fff;position:relative}
.dark--bg{
  background:linear-gradient(rgba(19,25,49,.92),rgba(19,25,49,.95)),url('../img/ui/adv.jpg') center/cover;
}
.about{display:grid;grid-template-columns:1.05fr .95fr;gap:50px;align-items:center}
.about__text p{color:rgba(255,255,255,.8);font-size:16px}
.about__list{list-style:none;margin:22px 0 0;padding:0;display:grid;gap:14px}
.about__list li{display:flex;gap:13px;font-size:15.5px;color:rgba(255,255,255,.9)}
.about__list svg{flex:0 0 24px;width:24px;height:24px;stroke:var(--orange);margin-top:1px}
.about__media{position:relative}
.about__media img{border-radius:var(--radius);width:100%;height:100%;object-fit:cover;box-shadow:var(--shadow)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:52px;border-top:1px solid rgba(255,255,255,.16);padding-top:36px}
.stat b{display:block;font-size:clamp(28px,3.4vw,42px);font-weight:800;color:var(--orange);line-height:1}
.stat span{font-size:14px;color:rgba(255,255,255,.7);margin-top:6px;display:block}

/* Преимущества (тёмная полоса) */
.why2{display:grid;grid-template-columns:repeat(4,1fr);gap:16px 30px}
.why2 .it{display:flex;gap:14px;padding:6px 0}
.why2 .it img{flex:0 0 30px;width:30px;height:30px;margin-top:2px}
.why2 .it b{display:block;font-size:16px;margin-bottom:4px}
.why2 .it p{margin:0;font-size:13.5px;color:rgba(255,255,255,.68);line-height:1.45}

/* ==========================================================================
   Галерея / применение
   ========================================================================== */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:200px;gap:14px}
.gallery a{position:relative;border-radius:12px;overflow:hidden;display:block}
.gallery a img{width:100%;height:100%;object-fit:cover;transition:.4s}
.gallery a:hover img{transform:scale(1.06)}
.gallery a::after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 55%,rgba(19,25,49,.55));opacity:0;transition:.25s}
.gallery a:hover::after{opacity:1}
.gallery .wide{grid-column:span 2}
.gallery .tall{grid-row:span 2}
.gallery__cap{position:absolute;left:14px;bottom:12px;color:#fff;font-weight:700;font-size:15px;z-index:2;text-shadow:0 2px 8px rgba(0,0,0,.6)}

.apply{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.apply .card{position:relative;border-radius:var(--radius);overflow:hidden;min-height:260px;display:flex;align-items:flex-end;box-shadow:var(--shadow-sm)}
.apply .card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.apply .card::after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 30%,rgba(19,25,49,.85))}
.apply .card b{position:relative;z-index:2;color:#fff;padding:22px;font-size:19px;font-weight:700}

/* ==========================================================================
   Благодарственные письма
   ========================================================================== */
.letters{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.letter{
  position:relative;display:block;background:#fff;border:1px solid var(--line);
  border-radius:12px;overflow:hidden;box-shadow:var(--shadow-sm);transition:.2s;
}
.letter:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:var(--orange)}
.letter img{width:100%;height:330px;object-fit:cover;object-position:top center;display:block}
.letter__ov{
  position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  background:linear-gradient(rgba(19,25,49,.72),rgba(19,25,49,.82));color:#fff;
  opacity:0;transition:.22s;font-weight:700;font-size:15px;
}
.letter:hover .letter__ov{opacity:1}
.letter__ov svg{width:34px;height:34px;stroke:var(--orange)}

/* ==========================================================================
   Доставка / оплата
   ========================================================================== */
.dcols{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.dbox{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow-sm)}
.dbox h3{margin:0 0 20px;font-size:21px;color:var(--navy);display:flex;align-items:center;gap:12px}
.dbox h3 .n{width:40px;height:40px;border-radius:10px;background:rgba(245,129,31,.12);display:grid;place-items:center}
.dbox h3 .n svg{width:22px;height:22px;stroke:var(--orange)}
.dlist{list-style:none;margin:0;padding:0;display:grid;gap:13px}
.dlist li{display:flex;gap:12px;font-size:15px;color:#333}
.dlist li svg{flex:0 0 22px;width:22px;height:22px;stroke:var(--orange);margin-top:1px}

/* ==========================================================================
   Этапы работы
   ========================================================================== */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:26px 34px}
.step{position:relative;padding-left:0}
.step__n{font-size:46px;font-weight:800;color:var(--orange);line-height:1;margin-bottom:10px;opacity:.95}
.step h3{font-size:18px;color:var(--navy);margin:0 0 6px}
.step p{margin:0;color:var(--muted);font-size:14.5px}

/* ==========================================================================
   Форма заявки
   ========================================================================== */
.order{background:linear-gradient(120deg,var(--navy),var(--navy-2));border-radius:20px;padding:46px;color:#fff;box-shadow:var(--shadow)}
.order__grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.order h2{font-size:clamp(24px,3vw,34px);font-weight:800;text-transform:uppercase;margin:0 0 14px;line-height:1.14}
.order p{color:rgba(255,255,255,.78);margin:0 0 18px}
.order__adv{list-style:none;padding:0;margin:0;display:grid;gap:11px}
.order__adv li{display:flex;gap:11px;font-size:15px}
.order__adv svg{flex:0 0 22px;width:22px;height:22px;stroke:var(--orange)}
.form{display:grid;gap:14px}
.form input,.form textarea{
  width:100%;padding:15px 17px;border-radius:10px;border:1px solid rgba(255,255,255,.2);
  background:rgba(255,255,255,.08);color:#fff;font-family:inherit;font-size:15px;
}
.form input::placeholder,.form textarea::placeholder{color:rgba(255,255,255,.55)}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--orange);background:rgba(255,255,255,.14)}
.form textarea{resize:vertical;min-height:88px}
.form__row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form__note{font-size:12px;color:rgba(255,255,255,.55);margin:2px 0 0}
.form__note a{color:rgba(255,255,255,.8);text-decoration:underline}
.form__ok{display:none;background:rgba(46,160,88,.16);border:1px solid rgba(46,160,88,.5);color:#c9f5d6;padding:14px 16px;border-radius:10px;font-size:14px}
.form__ok.show{display:block}

/* ==========================================================================
   Контакты
   ========================================================================== */
.contacts{display:grid;grid-template-columns:1fr 1fr;gap:44px}
.cinfo{display:grid;gap:26px;align-content:start}
.cblock{display:flex;gap:16px}
.cblock__ico{flex:0 0 48px;width:48px;height:48px;border-radius:11px;background:rgba(245,129,31,.16);display:grid;place-items:center}
.cblock__ico img{width:24px;height:24px}
.cblock h4{margin:0 0 4px;font-size:13px;text-transform:uppercase;letter-spacing:.05em;color:rgba(255,255,255,.55);font-weight:600}
.cblock .big{font-size:20px;font-weight:800;color:#fff}
.cblock a.big:hover{color:var(--orange)}
.cblock p{margin:0;color:rgba(255,255,255,.82);font-size:15px}
.map{position:relative;border-radius:var(--radius);overflow:hidden;min-height:360px;border:1px solid rgba(255,255,255,.16);background:var(--navy-2)}
.map iframe{position:absolute;inset:0;width:100%;height:100%;border:0;display:block}
.map__route{
  position:absolute;left:14px;bottom:14px;z-index:2;
  background:var(--orange);color:#fff;font-weight:700;font-size:14px;
  padding:11px 18px;border-radius:9px;box-shadow:0 8px 20px rgba(0,0,0,.3);
}
.map__route:hover{background:var(--orange-d)}

/* ==========================================================================
   Футер
   ========================================================================== */
.footer{background:var(--navy-deep);color:rgba(255,255,255,.6);padding:40px 0}
.footer__in{display:flex;flex-wrap:wrap;gap:20px;justify-content:space-between;align-items:center}
.footer__brand{display:flex;align-items:center;gap:14px}
.footer__brand img{height:44px;background:#fff;padding:6px 10px;border-radius:8px}
.footer__links{display:flex;gap:22px;flex-wrap:wrap}
.footer__links a{font-size:14px}
.footer__links a:hover{color:var(--orange)}
.footer small{display:block;width:100%;margin-top:22px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);font-size:12.5px;line-height:1.6}

/* ==========================================================================
   Плавающие кнопки
   ========================================================================== */
.floats{position:fixed;right:20px;bottom:22px;z-index:60;display:flex;flex-direction:column;gap:12px}
.fab{width:56px;height:56px;border-radius:50%;display:grid;place-items:center;box-shadow:0 10px 26px rgba(0,0,0,.28);transition:.2s}
.fab:hover{transform:scale(1.08)}
.fab svg{width:30px;height:30px;fill:#fff}
.fab--wa{background:#25d366}
.fab--tel{background:var(--orange)}

/* ==========================================================================
   Адаптив
   ========================================================================== */
@media (max-width:1024px){
  .hero__feats{grid-template-columns:repeat(2,1fr);gap:24px}
  .adv-grid,.products,.apply,.steps{grid-template-columns:repeat(2,1fr)}
  .why2{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .letters{grid-template-columns:repeat(3,1fr)}
  .about{grid-template-columns:1fr;gap:30px}
  .order__grid,.contacts,.dcols{grid-template-columns:1fr;gap:28px}
}
@media (max-width:860px){
  .topbar__contacts{display:none}
  .topbar__cta{margin-left:auto}
  .nav__list{position:fixed;top:0;right:-100%;bottom:0;width:78%;max-width:320px;background:var(--navy);
    flex-direction:column;padding:78px 22px 30px;gap:0;transition:.28s;box-shadow:-10px 0 40px rgba(0,0,0,.4);overflow-y:auto}
  .nav__list.open{right:0}
  .nav__list a{padding:15px 6px;border-bottom:1px solid rgba(255,255,255,.09);font-size:16px}
  .nav__list a::after{display:none}
  .nav__phone{display:block;margin-left:auto}
  .burger{display:flex}
  .nav__in{justify-content:space-between}
  .burger.open span:nth-child(1){transform:translateY(8px) rotate(45deg)}
  .burger.open span:nth-child(2){opacity:0}
  .burger.open span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}
}
@media (max-width:600px){
  .section{padding:52px 0}
  .adv-grid,.products,.apply,.steps,.hero__feats,.why2,.stats,.gallery{grid-template-columns:1fr}
  .letters{grid-template-columns:repeat(2,1fr);gap:12px}
  .letter img{height:240px}
  .gallery{grid-auto-rows:180px}
  .gallery .wide,.gallery .tall{grid-column:auto;grid-row:auto}
  .form__row{grid-template-columns:1fr}
  .order{padding:30px 22px}
  .hero__in{padding:52px 20px 46px}
  .hero__actions .btn{width:100%}
  .brand__tag{display:none}
  .footer__in{flex-direction:column;align-items:flex-start}
}