/* =========================================================
   HotZINK — горячее цинкование
   Палитра: графит / сталь / цинк / расплав
   ========================================================= */

:root{
  --ink:        #0d1013;
  --ink-2:      #12161a;
  --steel:      #191f25;
  --steel-line: #262e36;
  --zinc:       #c9d2da;
  --zinc-dim:   #8b95a0;
  --paper:      #eef1f4;
  --molten:     #ff6a1a;
  --molten-2:   #ffab2e;

  --shell: 1220px;
  --pad: clamp(20px, 5vw, 48px);

  --ff-display: 'Oswald', 'Arial Narrow', sans-serif;
  --ff-body: 'Golos Text', 'Segoe UI', system-ui, sans-serif;

  --ease: cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{ box-sizing:border-box; }

html{ scroll-behavior:smooth; scroll-padding-top:84px; }

body{
  margin:0;
  background:var(--ink);
  color:var(--zinc);
  font-family:var(--ff-body);
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

h1,h2,h3,h4{
  font-family:var(--ff-display);
  font-weight:600;
  line-height:1.05;
  letter-spacing:.01em;
  color:var(--paper);
  margin:0;
  text-transform:uppercase;
}

p{ margin:0; }
a{ color:inherit; text-decoration:none; }
ul,ol{ margin:0; padding:0; list-style:none; }

.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--pad);
}

.visually-hidden{
  position:absolute; width:1px; height:1px;
  overflow:hidden; clip:rect(0 0 0 0); white-space:nowrap;
}

/* ---- зернистая плёнка поверх всего ---- */
.grain{
  position:fixed; inset:0; z-index:9999; pointer-events:none;
  opacity:.045; mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* =========================== ШАПКА =========================== */
.header{
  position:fixed; inset:0 0 auto 0; z-index:100;
  transition:background .35s var(--ease), border-color .35s var(--ease), backdrop-filter .35s;
  border-bottom:1px solid transparent;
}
.header.is-stuck{
  background:rgba(13,16,19,.82);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom-color:var(--steel-line);
}
.header__inner{
  display:flex; align-items:center; gap:32px;
  height:76px;
}

.logo{ display:inline-flex; align-items:center; gap:10px; flex-shrink:0; }
.logo__mark{ width:28px; height:28px; color:var(--molten); display:block; }
.logo__mark svg{ width:100%; height:100%; display:block; }
.logo__text{
  font-family:var(--ff-display); font-weight:700; font-size:21px;
  letter-spacing:.08em; text-transform:uppercase; color:var(--paper);
}
.logo__text em{ font-style:normal; color:var(--molten); }

.nav{ display:flex; gap:28px; margin-left:auto; }
.nav a{
  font-size:14px; letter-spacing:.02em; color:var(--zinc-dim);
  position:relative; padding:6px 0; transition:color .25s;
}
.nav a::after{
  content:''; position:absolute; left:0; bottom:0; height:1px; width:0;
  background:var(--molten); transition:width .3s var(--ease);
}
.nav a:hover{ color:var(--paper); }
.nav a:hover::after{ width:100%; }

.header__actions{ display:flex; align-items:center; gap:16px; }
.header__phone{
  font-family:var(--ff-display); font-size:16px; letter-spacing:.04em;
  color:var(--paper); white-space:nowrap;
}
.header__phone:hover{ color:var(--molten-2); }

/* бургер */
.burger{
  display:none; width:40px; height:40px; padding:0;
  background:none; border:1px solid var(--steel-line); border-radius:2px;
  cursor:pointer; position:relative;
}
.burger span{
  position:absolute; left:11px; width:18px; height:1.5px; background:var(--paper);
  transition:transform .3s var(--ease), opacity .2s;
}
.burger span:nth-child(1){ top:14px; }
.burger span:nth-child(2){ top:19px; }
.burger span:nth-child(3){ top:24px; }
.burger[aria-expanded="true"] span:nth-child(1){ transform:translateY(5px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2){ opacity:0; }
.burger[aria-expanded="true"] span:nth-child(3){ transform:translateY(-5px) rotate(-45deg); }

/* =========================== КНОПКИ =========================== */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  padding:15px 30px; border:none; border-radius:2px; cursor:pointer;
  font-family:var(--ff-display); font-size:15px; font-weight:500;
  letter-spacing:.09em; text-transform:uppercase;
  color:#160b03; background:linear-gradient(135deg,var(--molten-2),var(--molten));
  position:relative; overflow:hidden;
  transition:transform .25s var(--ease), box-shadow .3s var(--ease);
  box-shadow:0 8px 30px -12px rgba(255,106,26,.8);
}
.btn::after{
  content:''; position:absolute; inset:0;
  background:linear-gradient(120deg,transparent 30%,rgba(255,255,255,.45),transparent 70%);
  transform:translateX(-120%); transition:transform .6s var(--ease);
}
.btn:hover{ transform:translateY(-2px); box-shadow:0 14px 38px -12px rgba(255,106,26,.95); }
.btn:hover::after{ transform:translateX(120%); }
.btn--sm{ padding:11px 20px; font-size:13px; }
.btn--wide{ width:100%; padding:17px 30px; }
.btn--ghost{
  background:transparent; color:var(--paper); box-shadow:none;
  border:1px solid var(--steel-line);
}
.btn--ghost:hover{ border-color:var(--molten); color:var(--molten-2); box-shadow:none; }

/* =========================== ГЕРОЙ =========================== */
.hero{
  position:relative; overflow:hidden;
  padding:clamp(140px,18vh,190px) 0 0;
  background:
    radial-gradient(120% 90% at 50% 120%, rgba(255,106,26,.16), transparent 60%),
    linear-gradient(180deg,#0d1013 0%,#111519 60%,#0d1013 100%);
}
.hero__glow{
  position:absolute; left:50%; bottom:-380px; width:900px; height:900px;
  transform:translateX(-50%);
  background:radial-gradient(circle, rgba(255,140,40,.34), rgba(255,90,10,.10) 42%, transparent 68%);
  filter:blur(24px);
  animation:breathe 9s ease-in-out infinite;
}
@keyframes breathe{
  0%,100%{ opacity:.75; transform:translateX(-50%) scale(1); }
  50%    { opacity:1;   transform:translateX(-50%) scale(1.08); }
}
/* «спанглы» — кристаллическая текстура цинка */
.hero__crystals{
  position:absolute; inset:0; opacity:.18; pointer-events:none;
  background-image:
    repeating-linear-gradient(60deg, rgba(201,210,218,.16) 0 1px, transparent 1px 46px),
    repeating-linear-gradient(-60deg, rgba(201,210,218,.16) 0 1px, transparent 1px 46px),
    repeating-linear-gradient(0deg, rgba(201,210,218,.10) 0 1px, transparent 1px 46px);
  -webkit-mask-image:radial-gradient(70% 60% at 50% 30%, #000 0%, transparent 78%);
  mask-image:radial-gradient(70% 60% at 50% 30%, #000 0%, transparent 78%);
}
.hero__inner{ position:relative; z-index:2; text-align:center; }

.eyebrow{
  font-family:var(--ff-display); font-size:13px; font-weight:500;
  letter-spacing:.22em; text-transform:uppercase; color:var(--molten-2);
  margin-bottom:22px;
}

.hero__title{
  font-size:clamp(28px, 8.4vw, 108px);
  font-weight:700; letter-spacing:-.005em; line-height:1;
}
.hero__title span{ display:block; }
/* самое длинное слово — чуть мельче, чтобы не упиралось в края */
.hero__title span:last-child{ font-size:.9em; }
.hero__title--accent{
  color:transparent;
  background:linear-gradient(180deg,#fff 0%,var(--molten-2) 45%,var(--molten) 100%);
  -webkit-background-clip:text; background-clip:text;
}

.hero__lead{
  max-width:640px; margin:28px auto 0;
  font-size:clamp(15px,1.7vw,18px); color:var(--zinc-dim);
}

.hero__cta{
  display:flex; gap:14px; justify-content:center; flex-wrap:wrap;
  margin-top:38px;
}

.stats{
  display:grid; grid-template-columns:repeat(4,1fr);
  gap:1px; margin:clamp(56px,8vw,90px) 0 0;
  background:var(--steel-line);
  border-block:1px solid var(--steel-line);
}
.stat{ background:var(--ink); padding:26px 18px; }
.stat dt{
  font-size:12px; letter-spacing:.12em; text-transform:uppercase;
  color:var(--zinc-dim); margin-bottom:8px;
}
.stat dd{
  margin:0; font-family:var(--ff-display); font-weight:600;
  font-size:clamp(30px,4.4vw,46px); line-height:1; color:var(--paper);
}
.stat dd span{
  font-size:.42em; color:var(--molten); margin-left:5px; letter-spacing:.04em;
}

/* бегущая строка стандартов */
.ticker{
  overflow:hidden; border-bottom:1px solid var(--steel-line);
  background:var(--ink-2); padding:14px 0;
}
.ticker__track{
  display:flex; align-items:center; gap:26px; width:max-content;
  animation:slide 38s linear infinite;
}
.ticker__track span{
  font-family:var(--ff-display); font-size:13px; letter-spacing:.2em;
  text-transform:uppercase; color:var(--zinc-dim); white-space:nowrap;
}
.ticker__track i{ width:5px; height:5px; background:var(--molten); flex-shrink:0; transform:rotate(45deg); }
@keyframes slide{ from{ transform:translateX(0); } to{ transform:translateX(-50%); } }

/* =========================== СЕКЦИИ =========================== */
.section{ padding:clamp(72px,10vw,124px) 0; position:relative; }
.section--dark{ background:var(--ink-2); border-block:1px solid var(--steel-line); }

.section__head{ max-width:760px; margin-bottom:clamp(40px,5vw,64px); }
.section__title{ font-size:clamp(30px,4.6vw,54px); font-weight:600; }
.section__lead{ margin-top:20px; color:var(--zinc-dim); max-width:620px; font-size:17px; }

/* ---- карточки услуг ---- */
.cards{
  display:grid; gap:18px;
  grid-template-columns:repeat(3,1fr);
}
.card{
  position:relative; padding:32px 28px 30px;
  background:var(--steel);
  border:1px solid var(--steel-line); border-radius:3px;
  transition:transform .4s var(--ease), border-color .4s, background .4s;
  overflow:hidden;
}
.card::before{
  content:''; position:absolute; inset:0 auto auto 0; height:2px; width:0;
  background:linear-gradient(90deg,var(--molten),var(--molten-2));
  transition:width .5s var(--ease);
}
.card:hover{ transform:translateY(-5px); border-color:#3a444e; background:#1c2229; }
.card:hover::before{ width:100%; }
.card__num{
  font-family:var(--ff-display); font-size:13px; letter-spacing:.2em;
  color:var(--molten); display:block; margin-bottom:16px;
}
.card h3{ font-size:23px; margin-bottom:12px; }
.card p{ color:var(--zinc-dim); font-size:15.5px; }

.card--hero{
  grid-column:span 2; grid-row:span 2;
  background:
    radial-gradient(90% 70% at 100% 0%, rgba(255,106,26,.12), transparent 60%),
    var(--steel);
  padding:40px 36px;
  display:flex; flex-direction:column;
}
.card--hero h3{ font-size:clamp(28px,3.4vw,40px); }
.card--hero p{ font-size:17px; max-width:46ch; }
.card__list{
  margin-top:auto; padding-top:28px;
  display:grid; grid-template-columns:1fr 1fr; gap:10px 22px;
}
.card__list li{
  font-size:14.5px; color:var(--zinc);
  padding-left:20px; position:relative;
}
.card__list li::before{
  content:''; position:absolute; left:0; top:.62em;
  width:6px; height:6px; background:var(--molten); transform:rotate(45deg);
}

/* ---- шаги процесса ---- */
.steps{
  display:grid; gap:1px;
  grid-template-columns:repeat(3,1fr);
  background:var(--steel-line);
  border:1px solid var(--steel-line);
}
.step{
  background:var(--ink-2); padding:34px 30px 36px;
  position:relative; transition:background .35s;
}
.step:hover{ background:var(--steel); }
.step__idx{
  font-family:var(--ff-display); font-size:44px; font-weight:700; line-height:1;
  color:transparent; -webkit-text-stroke:1px #38424c;
  display:block; margin-bottom:18px;
  transition:-webkit-text-stroke-color .35s, color .35s;
}
.step:hover .step__idx{ -webkit-text-stroke-color:var(--molten); }
.step h3{ font-size:20px; margin-bottom:10px; }
.step p{ color:var(--zinc-dim); font-size:15px; }

.step--hot{
  background:
    radial-gradient(120% 100% at 50% 100%, rgba(255,106,26,.16), transparent 65%),
    var(--ink-2);
}
.step--hot .step__idx{ color:var(--molten); -webkit-text-stroke-color:transparent; }
.step--hot h3{ color:var(--molten-2); }

/* ---- таблица возможностей ---- */
.specs{
  display:grid; grid-template-columns:1fr 1.15fr; gap:clamp(36px,6vw,72px);
  align-items:start;
}
.specs__text .btn{ margin-top:32px; }
.specs__table table{ width:100%; border-collapse:collapse; }
.specs__table tr{ border-bottom:1px solid var(--steel-line); }
.specs__table tr:first-child{ border-top:1px solid var(--steel-line); }
.specs__table th{
  text-align:left; font-weight:400; padding:17px 16px 17px 0;
  color:var(--zinc-dim); font-size:15px;
}
.specs__table td{
  text-align:right; padding:17px 0;
  font-family:var(--ff-display); font-size:17px; letter-spacing:.03em;
  color:var(--paper); white-space:nowrap;
}
.specs__table tr:hover th{ color:var(--paper); }
.specs__table tr:hover td{ color:var(--molten-2); }

/* ---- преимущества ---- */
.benefits{ display:grid; grid-template-columns:repeat(3,1fr); gap:clamp(24px,3vw,40px); }
.benefit{ padding-top:22px; border-top:1px solid var(--steel-line); }
.benefit h3{ font-size:19px; margin-bottom:10px; }
.benefit p{ color:var(--zinc-dim); font-size:15.5px; }

/* ---- отрасли ---- */
.chips{ display:flex; flex-wrap:wrap; gap:10px; }
.chips li{
  padding:11px 20px; border:1px solid var(--steel-line); border-radius:100px;
  font-size:15px; color:var(--zinc);
  transition:border-color .3s, color .3s, transform .3s var(--ease);
}
.chips li:hover{ border-color:var(--molten); color:var(--molten-2); transform:translateY(-2px); }

/* =========================== ЗАЯВКА =========================== */
.quote{ position:relative; overflow:hidden; background:var(--ink-2); border-top:1px solid var(--steel-line); }
.quote__glow{
  position:absolute; right:-260px; top:-160px; width:720px; height:720px;
  background:radial-gradient(circle, rgba(255,106,26,.16), transparent 62%);
  filter:blur(20px); pointer-events:none;
}
.quote__inner{
  position:relative; z-index:2;
  display:grid; grid-template-columns:1fr 1fr; gap:clamp(36px,6vw,72px);
  align-items:start;
}
.quote__points{ margin-top:30px; display:grid; gap:12px; }
.quote__points li{ padding-left:22px; position:relative; color:var(--zinc); }
.quote__points li::before{
  content:''; position:absolute; left:0; top:.6em;
  width:7px; height:7px; background:var(--molten); transform:rotate(45deg);
}

.form{
  background:var(--steel); border:1px solid var(--steel-line); border-radius:3px;
  padding:clamp(24px,3.4vw,36px);
  display:grid; gap:18px;
}
.form__row{ display:grid; grid-template-columns:1fr 1fr; gap:18px; }
.field{ display:grid; gap:8px; }
.field > span{
  font-size:12.5px; letter-spacing:.1em; text-transform:uppercase; color:var(--zinc-dim);
}
.field > span i{ color:var(--molten); font-style:normal; margin-left:3px; }
.field input, .field select, .field textarea{
  width:100%; padding:14px 16px;
  background:var(--ink); color:var(--paper);
  border:1px solid var(--steel-line); border-radius:2px;
  font-family:var(--ff-body); font-size:15.5px;
  transition:border-color .25s, box-shadow .25s;
  resize:vertical;
}
.field input::placeholder, .field textarea::placeholder{ color:#5c6670; }
.field input:focus, .field select:focus, .field textarea:focus{
  outline:none; border-color:var(--molten);
  box-shadow:0 0 0 3px rgba(255,106,26,.14);
}
.field input.is-error, .field select.is-error{ border-color:#e2413d; }
.field select{
  appearance:none; -webkit-appearance:none; cursor:pointer;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1.5 6 6.5l5-5' stroke='%238b95a0' stroke-width='1.6'/%3E%3C/svg%3E");
  background-repeat:no-repeat; background-position:right 16px center;
  padding-right:42px;
}
.field select option{ background:var(--ink); color:var(--paper); }
.check{ display:flex; align-items:flex-start; gap:10px; font-size:13.5px; color:var(--zinc-dim); cursor:pointer; }
.check input{ margin-top:3px; accent-color:var(--molten); width:16px; height:16px; flex-shrink:0; }
.form__note{ font-size:14px; min-height:20px; color:var(--molten-2); }
.form__note.is-ok{ color:#54c98a; }

/* =========================== ПОДВАЛ =========================== */
.footer{ background:var(--ink); border-top:1px solid var(--steel-line); padding-top:clamp(48px,6vw,72px); }
.footer__inner{
  display:grid; grid-template-columns:1.6fr 1fr 1fr 1fr; gap:36px;
  padding-bottom:48px;
}
.footer__brand p{ margin-top:18px; color:var(--zinc-dim); font-size:15px; }
.footer__col h4{
  font-size:13px; letter-spacing:.16em; color:var(--zinc-dim);
  margin-bottom:16px; font-weight:500;
}
.footer__col a, .footer__col p{
  display:block; color:var(--zinc); font-size:15.5px; margin-bottom:8px;
}
.footer__col .footer__muted{ color:var(--zinc-dim); font-size:14px; margin-top:14px; }
.footer__col a{ transition:color .25s; }
.footer__col a:hover{ color:var(--molten-2); }
.footer__bottom{
  border-top:1px solid var(--steel-line);
  padding-block:22px;
  display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap;
  font-size:13.5px; color:#5c6670;
}

/* =========================== АНИМАЦИЯ ПОЯВЛЕНИЯ =========================== */
.reveal{
  opacity:0; transform:translateY(22px);
  transition:opacity .7s var(--ease) var(--d,0s), transform .7s var(--ease) var(--d,0s);
}
.reveal.is-in{ opacity:1; transform:none; }

/* =========================== АДАПТИВ =========================== */
@media (max-width:1080px){
  .cards{ grid-template-columns:repeat(2,1fr); }
  .card--hero{ grid-column:span 2; grid-row:auto; }
  .steps{ grid-template-columns:repeat(2,1fr); }
  .benefits{ grid-template-columns:repeat(2,1fr); }
  .footer__inner{ grid-template-columns:1fr 1fr; }
}

@media (max-width:900px){
  .header__phone{ display:none; }
  .burger{ display:block; }
  .header__inner{ gap:14px; }
  .header__actions{ margin-left:auto; }
  .nav{
    position:fixed; inset:76px 0 auto 0;
    flex-direction:column; gap:0;
    background:rgba(13,16,19,.97); backdrop-filter:blur(16px);
    border-bottom:1px solid var(--steel-line);
    padding:8px var(--pad) 24px;
    transform:translateY(-12px); opacity:0; pointer-events:none;
    transition:opacity .28s var(--ease), transform .28s var(--ease);
  }
  .nav.is-open{ opacity:1; transform:none; pointer-events:auto; }
  .nav a{ padding:15px 0; border-bottom:1px solid var(--steel-line); font-size:17px; }
  .specs, .quote__inner{ grid-template-columns:1fr; }
  .stats{ grid-template-columns:repeat(2,1fr); }
}

@media (max-width:620px){
  .cards, .steps, .benefits{ grid-template-columns:1fr; }
  .card--hero{ grid-column:auto; }
  .card__list, .form__row{ grid-template-columns:1fr; }
  .footer__inner{ grid-template-columns:1fr; gap:30px; }
  .specs__table th{ font-size:14px; padding-right:12px; }
  .specs__table td{ font-size:15px; white-space:normal; }
  .hero__cta .btn{ width:100%; }
}

@media (max-width:360px){
  /* на очень узких экранах в шапке остаются только логотип и меню */
  .header__actions .btn--sm{ display:none; }
}

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