:root{
  --blue:#1F3A5F; --blue-2:#2C4F7C; --orange:#F59E0B; --orange-2:#D97706;
  --bg:#F5F7FA; --card:#FFFFFF; --text:#1F2937; --muted:#6B7280;
  --green:#10B981; --border:#E5E7EB; --radius:12px;
  --shadow:0 4px 20px rgba(31,58,95,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  color:var(--text);background:var(--bg);line-height:1.6;font-size:16px}
a{color:var(--blue);text-decoration:none;transition:color .15s}
a:hover{color:var(--orange)}
img{max-width:100%;height:auto;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* Header */
.header{background:#fff;box-shadow:0 1px 0 var(--border);position:sticky;top:0;z-index:50}
.header__inner{display:flex;align-items:center;gap:24px;padding:12px 0;flex-wrap:wrap;position:relative}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--blue);font-size:18px}
.logo img{height:44px;width:auto}
.nav{display:flex;gap:20px;flex-wrap:wrap;margin-left:auto}
.nav a{font-size:15px;font-weight:500;color:var(--text)}
.nav a:hover{color:var(--orange)}
.header__contacts{display:flex;gap:12px;align-items:center}
.header__phone{font-weight:700;color:var(--blue);white-space:nowrap}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:8px;font-weight:600;font-size:15px;
  border:none;cursor:pointer;transition:transform .1s,background .15s;text-align:center}
.btn:active{transform:translateY(1px)}
.btn-accent{background:var(--orange);color:#fff}
.btn-accent:hover{background:var(--orange-2);color:#fff}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-2);color:#fff}
.btn-outline{background:transparent;color:var(--blue);border:2px solid var(--blue)}
.btn-outline:hover{background:var(--blue);color:#fff}
.btn-green{background:var(--green);color:#fff}
.btn-green:hover{background:#059669;color:#fff}
.btn-lg{padding:16px 28px;font-size:17px}

/* Hero */
.hero{background:linear-gradient(135deg,#1F3A5F 0%,#2C4F7C 100%);color:#fff;padding:70px 0}
.hero h1{font-size:38px;line-height:1.2;margin-bottom:16px;max-width:900px}
.hero p{font-size:18px;opacity:.92;max-width:760px;margin-bottom:28px}
.hero__btns{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:14px}
.hero__note{font-size:14px;opacity:.75}

/* Sections */
.section{padding:64px 0}
.section--alt{background:#fff}
.section__title{font-size:30px;color:var(--blue);margin-bottom:12px;text-align:center}
.section__sub{text-align:center;color:var(--muted);margin-bottom:40px;max-width:720px;margin-left:auto;margin-right:auto}

/* Grid + Cards */
.grid{display:grid;gap:20px}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}
@media(max-width:960px){.grid--3,.grid--4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.grid--3,.grid--4{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:22px;transition:box-shadow .2s,transform .2s;display:flex;flex-direction:column}
.card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.card h3{font-size:18px;color:var(--blue);margin-bottom:8px}
.card p{color:var(--muted);font-size:14px;flex:1}
.card__link{margin-top:14px;font-weight:600;color:var(--orange);font-size:14px}
.card__link:hover{color:var(--orange-2)}

/* Features list */
.features{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
@media(max-width:700px){.features{grid-template-columns:1fr}}
.feature{background:#fff;border-left:4px solid var(--orange);padding:16px 20px;border-radius:8px}
.feature h4{color:var(--blue);margin-bottom:6px;font-size:16px}
.feature p{color:var(--muted);font-size:14px}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:step}
@media(max-width:900px){.steps{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.steps{grid-template-columns:1fr}}
.step{background:#fff;border-radius:var(--radius);padding:22px;position:relative;border:1px solid var(--border)}
.step::before{counter-increment:step;content:counter(step);
  position:absolute;top:-16px;left:22px;width:32px;height:32px;
  background:var(--orange);color:#fff;border-radius:50%;
  display:flex;align-items:center;justify-content:center;font-weight:700}
.step h4{margin-top:8px;color:var(--blue);margin-bottom:6px}
.step p{font-size:14px;color:var(--muted)}

/* Cities */
.cities{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:20px}
.cities a{background:#fff;border:1px solid var(--border);padding:8px 16px;border-radius:20px;font-size:14px}
.cities a:hover{background:var(--blue);color:#fff;border-color:var(--blue)}

/* CTA */
.cta{background:linear-gradient(135deg,#1F3A5F 0%,#2C4F7C 100%);color:#fff;padding:64px 0;text-align:center}
.cta h2{font-size:28px;margin-bottom:14px}
.cta p{font-size:17px;opacity:.9;margin-bottom:26px;max-width:640px;margin-left:auto;margin-right:auto}
.cta__btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* Footer */
.footer{background:#0F2440;color:#B8C4D6;padding:48px 0 24px;font-size:14px}
.footer h4{color:#fff;margin-bottom:14px;font-size:15px}
.footer a{color:#B8C4D6}
.footer a:hover{color:var(--orange)}
.footer__grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:32px;margin-bottom:32px}
@media(max-width:800px){.footer__grid{grid-template-columns:1fr 1fr}}
@media(max-width:500px){.footer__grid{grid-template-columns:1fr}}
.footer ul{list-style:none}
.footer ul li{margin-bottom:8px}
.footer__bottom{border-top:1px solid #1F3A5F;padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13px;color:#7A8AA3}

/* Contact buttons row */
.contact-row{display:flex;gap:10px;flex-wrap:wrap}
@media(max-width:600px){.hero h1{font-size:28px}.section__title{font-size:24px}}

/* === Мобильное меню === */
.burger{
  display:none;
  width:40px;height:40px;
  background:transparent;border:none;cursor:pointer;
  flex-direction:column;justify-content:center;align-items:center;
  gap:5px;padding:0;margin-left:8px;
  z-index:110;position:relative;
}
.burger span{
  display:block;width:24px;height:2px;
  background:var(--blue);
  transition:transform .25s,opacity .25s;
  border-radius:2px;
}
.burger--open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.burger--open span:nth-child(2){opacity:0;}
.burger--open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

body.no-scroll{overflow:hidden;}

.nav-overlay{
  display:none;
  position:fixed;inset:0;
  background:rgba(15,36,64,.5);
  z-index:90;
}
body.no-scroll .nav-overlay{display:block;}

@media (max-width:800px){
  .header__inner{padding:8px 0;gap:10px;flex-wrap:nowrap;position:relative;}
  .logo img{height:38px;}
  .header__phone{font-size:14px;margin-left:auto;white-space:nowrap;}

  .nav{
    position:fixed;top:0;right:-100%;
    width:82%;max-width:320px;height:100vh;
    background:#fff;
    flex-direction:column;
    padding:76px 24px 24px;
    gap:0;margin:0;
    box-shadow:-8px 0 24px rgba(0,0,0,.12);
    transition:right .28s ease;
    z-index:100;
    overflow-y:auto;
    align-items:stretch;
    display:flex;
  }
  .nav.nav--open{right:0;}
  .nav a{
    padding:14px 0;
    border-bottom:1px solid var(--border);
    font-size:16px;
    display:block;
    color:var(--text);
  }
  .nav a:last-child{border-bottom:none;}

  .burger{display:flex;}
}