/* ============================================================
   3D Вектор — локальные стили. Системные шрифты, без внешних CDN.
   ============================================================ */
:root{
  --navy:#0e1b2c;
  --navy-2:#13263c;
  --ink:#1c2733;
  --muted:#5b6b7b;
  --line:#e3e8ee;
  --bg:#ffffff;
  --bg-soft:#f5f7fa;
  --bg-soft-2:#eef2f7;
  --accent:#ff6b1a;
  --accent-dark:#e85c0c;
  --accent-soft:#fff1e8;
  --blue:#1f6feb;
  --ok:#1f9d57;
  --radius:14px;
  --radius-sm:9px;
  --shadow:0 10px 30px rgba(14,27,44,.08);
  --shadow-sm:0 4px 14px rgba(14,27,44,.07);
  --container:1180px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",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);
  line-height:1.6;font-size:17px;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{color:var(--navy);line-height:1.2;font-weight:700;margin:0 0 .6em}
h1{font-size:clamp(1.8rem,3.4vw,2.7rem)}
h2{font-size:clamp(1.4rem,2.6vw,2rem)}
h3{font-size:1.25rem}
p{margin:0 0 1em}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
.skip-link{position:absolute;left:-9999px;top:0;background:#fff;padding:10px 16px;z-index:200}
.skip-link:focus{left:10px;top:10px}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:13px 26px;border-radius:var(--radius-sm);font-weight:600;font-size:1rem;
  border:2px solid transparent;cursor:pointer;transition:.18s ease;text-decoration:none;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn--accent{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn--accent:hover{background:var(--accent-dark);border-color:var(--accent-dark);color:#fff}
.btn--dark{background:var(--navy);color:#fff;border-color:var(--navy)}
.btn--dark:hover{background:var(--navy-2);color:#fff}
.btn--ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn--ghost:hover{background:rgba(255,255,255,.12);color:#fff}
.btn--outline{background:#fff;color:var(--navy);border-color:var(--line)}
.btn--outline:hover{border-color:var(--accent);color:var(--accent-dark)}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid var(--line)}
.header__inner{display:flex;align-items:center;gap:22px;min-height:74px}
.brand{display:flex;align-items:center;gap:11px;color:var(--navy)}
.brand:hover{text-decoration:none}
.brand__mark{color:var(--accent);display:flex}
.brand__text{display:flex;flex-direction:column;line-height:1.1}
.brand__text strong{font-size:1.25rem;letter-spacing:.2px}
.brand__text small{color:var(--muted);font-size:.72rem}
.nav{margin-left:auto}
.nav__list{list-style:none;display:flex;gap:4px;margin:0;padding:0}
.nav__item{position:relative}
.nav__link{display:block;padding:10px 13px;color:var(--ink);font-weight:600;font-size:.95rem;border-radius:8px}
.nav__link:hover{color:var(--accent-dark);text-decoration:none;background:var(--bg-soft)}
.nav__link.is-active{color:var(--accent-dark)}
.nav__item.has-children>.nav__link::after{content:"▾";font-size:.7em;margin-left:5px;color:var(--muted)}
.nav__sub{
  list-style:none;margin:0;padding:8px;position:absolute;top:100%;left:0;min-width:210px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);box-shadow:var(--shadow);
  opacity:0;visibility:hidden;transform:translateY(6px);transition:.16s;z-index:30;
}
.nav__item.has-children:hover .nav__sub,
.nav__item.has-children:focus-within .nav__sub{opacity:1;visibility:visible;transform:translateY(0)}
.nav__sublink{display:block;padding:9px 12px;border-radius:7px;color:var(--ink);font-weight:500}
.nav__sublink:hover{background:var(--bg-soft);color:var(--accent-dark);text-decoration:none}
.nav__sublink.is-active{color:var(--accent-dark)}
.header__phone{display:flex;flex-direction:column;text-align:right;color:var(--navy);line-height:1.15}
.header__phone span{font-weight:700;font-size:1.05rem}
.header__phone small{color:var(--muted);font-size:.7rem}
.header__phone:hover{text-decoration:none;color:var(--accent-dark)}
.nav-toggle{display:none;flex-direction:column;gap:5px;width:44px;height:44px;border:1px solid var(--line);
  background:#fff;border-radius:9px;cursor:pointer;align-items:center;justify-content:center;margin-left:auto}
.nav-toggle span{width:22px;height:2px;background:var(--navy);transition:.2s}

/* ---------- Breadcrumbs ---------- */
.breadcrumbs{background:var(--bg-soft);border-bottom:1px solid var(--line);font-size:.85rem}
.breadcrumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:11px 0}
.breadcrumbs li{color:var(--muted)}
.breadcrumbs li+li::before{content:"›";margin-right:8px;color:var(--line)}
.breadcrumbs a{color:var(--muted)}
.breadcrumbs a:hover{color:var(--accent-dark)}

/* ---------- Sections ---------- */
.section{padding:64px 0}
.section--soft{background:var(--bg-soft)}
.section--navy{background:var(--navy);color:#cdd7e2}
.section--navy h2,.section--navy h3{color:#fff}
.section__head{max-width:760px;margin:0 auto 40px;text-align:center}
.section__head.left{margin-left:0;text-align:left}
.section__head p{color:var(--muted);font-size:1.05rem;margin:0}
.eyebrow{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  color:var(--accent-dark);background:var(--accent-soft);padding:5px 12px;border-radius:999px;margin-bottom:14px}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(160deg,var(--navy) 0%,#16304c 60%,#1c3c5e 100%);color:#fff;overflow:hidden;position:relative}
.hero__inner{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;padding:72px 0}
.hero h1{color:#fff;margin-bottom:.4em}
.hero__lead{font-size:1.18rem;color:#c9d6e4;max-width:560px}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero__stats{display:flex;gap:30px;margin-top:36px;flex-wrap:wrap}
.hero__stat strong{display:block;font-size:1.9rem;color:#fff}
.hero__stat span{color:#9fb2c6;font-size:.85rem}
.hero__panel{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius);
  padding:26px;backdrop-filter:blur(2px)}
.hero__panel h3{color:#fff;font-size:1.1rem}
.hero__panel ul{list-style:none;margin:0;padding:0}
.hero__panel li{display:flex;gap:10px;padding:9px 0;border-bottom:1px solid rgba(255,255,255,.1);color:#d7e2ee;font-size:.95rem}
.hero__panel li:last-child{border-bottom:0}
.hero__panel li::before{content:"✓";color:var(--accent);font-weight:700}

/* ---------- Cards / grids ---------- */
.grid{display:grid;gap:22px}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow-sm);transition:.18s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.card h3{margin-bottom:.45em}
.card p{color:var(--muted);margin:0}
.card__icon{width:50px;height:50px;border-radius:12px;background:var(--accent-soft);color:var(--accent-dark);
  display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:16px}
.card--link{display:block;color:inherit}
.card--link:hover{text-decoration:none}
.card__more{display:inline-block;margin-top:14px;color:var(--accent-dark);font-weight:600;font-size:.93rem}

.feature{display:flex;gap:14px;align-items:flex-start}
.feature__num{flex:0 0 auto;width:38px;height:38px;border-radius:10px;background:var(--navy);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700}
.feature h3{font-size:1.08rem;margin-bottom:.25em}
.feature p{color:var(--muted);margin:0;font-size:.95rem}

/* price cards */
.price-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow-sm)}
.price-card--featured{border-color:var(--accent);box-shadow:var(--shadow)}
.price-card h3{margin-bottom:.2em}
.price-card .price{font-size:2rem;color:var(--navy);font-weight:800;margin:6px 0 2px}
.price-card .price small{font-size:.95rem;color:var(--muted);font-weight:500}
.price-card ul{list-style:none;margin:16px 0 22px;padding:0}
.price-card li{padding:7px 0;border-bottom:1px solid var(--line);color:var(--muted);font-size:.93rem}
.price-card li::before{content:"–";margin-right:8px;color:var(--accent)}
.price-card .btn{margin-top:auto}

/* material chips */
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 16px;font-weight:600;font-size:.9rem;color:var(--navy)}
.chip--soft{background:var(--bg-soft)}

/* steps */
.steps{counter-reset:step;display:grid;gap:18px}
.steps--row{grid-template-columns:repeat(4,1fr)}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 22px;position:relative}
.step::before{counter-increment:step;content:counter(step);position:absolute;top:-14px;left:22px;
  width:34px;height:34px;background:var(--accent);color:#fff;border-radius:50%;display:flex;align-items:center;
  justify-content:center;font-weight:700;font-size:.95rem}
.step h3{font-size:1.05rem;margin:8px 0 .3em}
.step p{color:var(--muted);font-size:.92rem;margin:0}

/* generic list with checks */
.checklist{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.checklist li{display:flex;gap:11px;align-items:flex-start}
.checklist li::before{content:"✓";flex:0 0 auto;width:24px;height:24px;border-radius:50%;background:var(--accent-soft);
  color:var(--accent-dark);font-weight:700;display:flex;align-items:center;justify-content:center;font-size:.8rem;margin-top:2px}

/* split content blocks */
.split{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.split--media .media-box{background:linear-gradient(150deg,var(--bg-soft),var(--bg-soft-2));border:1px solid var(--line);
  border-radius:var(--radius);min-height:300px;display:flex;align-items:center;justify-content:center;color:var(--muted);
  padding:30px;text-align:center}

/* portfolio gallery */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.gallery__item{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;box-shadow:var(--shadow-sm)}
.gallery__thumb{aspect-ratio:4/3;background:linear-gradient(135deg,#dfe7f0,#eef2f7);display:flex;align-items:center;
  justify-content:center;color:#9fb0c2;font-size:2.4rem}
.gallery__body{padding:16px 18px}
.gallery__body h3{font-size:1.02rem;margin-bottom:.2em}
.gallery__body p{color:var(--muted);font-size:.88rem;margin:0}
.tag{display:inline-block;font-size:.74rem;font-weight:700;color:var(--accent-dark);background:var(--accent-soft);
  padding:3px 9px;border-radius:6px;margin-bottom:8px}

/* reviews */
.review{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm)}
.review__stars{color:var(--accent);letter-spacing:2px;margin-bottom:10px}
.review p{font-style:italic;color:var(--ink)}
.review__author{display:flex;align-items:center;gap:12px;margin-top:16px}
.review__avatar{width:42px;height:42px;border-radius:50%;background:var(--navy);color:#fff;display:flex;
  align-items:center;justify-content:center;font-weight:700}
.review__author b{display:block;font-size:.95rem}
.review__author span{color:var(--muted);font-size:.82rem}

/* FAQ */
.faq{display:grid;gap:12px;max-width:860px;margin:0 auto}
.faq details{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:0}
.faq summary{cursor:pointer;padding:18px 22px;font-weight:600;color:var(--navy);list-style:none;display:flex;
  justify-content:space-between;align-items:center;gap:14px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.4rem;color:var(--accent);font-weight:400;transition:.2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .faq__body{padding:0 22px 18px;color:var(--muted)}
.faq .faq__body p{margin:0 0 .6em}

/* contacts */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:start}
.contact-list{list-style:none;margin:0 0 24px;padding:0;display:grid;gap:16px}
.contact-list li{display:flex;gap:14px;align-items:flex-start}
.contact-list .ic{flex:0 0 auto;width:42px;height:42px;border-radius:11px;background:var(--accent-soft);
  color:var(--accent-dark);display:flex;align-items:center;justify-content:center;font-size:1.2rem}
.contact-list b{display:block;color:var(--navy)}
.contact-list span{color:var(--muted);font-size:.92rem}

/* forms */
.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm)}
.form .field{margin-bottom:16px}
.form label{display:block;font-weight:600;font-size:.9rem;margin-bottom:6px;color:var(--navy)}
.form input,.form textarea,.form select{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:9px;
  font:inherit;font-size:.95rem;background:#fff;color:var(--ink)}
.form input:focus,.form textarea:focus,.form select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.form textarea{min-height:120px;resize:vertical}
.form .hint{font-size:.8rem;color:var(--muted);margin-top:6px}

/* calculator */
.calc{display:grid;grid-template-columns:1.2fr .8fr;gap:28px;align-items:start}
.calc__result{background:var(--navy);color:#fff;border-radius:var(--radius);padding:28px;position:sticky;top:90px}
.calc__result .total{font-size:2.4rem;font-weight:800;color:#fff;margin:6px 0}
.calc__result small{color:#9fb2c6}
.calc__row{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid rgba(255,255,255,.12);font-size:.92rem;color:#cdd7e2}
.range-val{font-weight:700;color:var(--navy)}

/* ---------- Blog ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow-sm);transition:.18s}
.post-card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.post-card__thumb{aspect-ratio:16/9;background:linear-gradient(135deg,var(--navy),#1c3c5e);color:#fff;display:flex;
  align-items:center;justify-content:center;padding:20px;text-align:center;font-weight:700;font-size:1.05rem;line-height:1.3}
.post-card__body{padding:20px 22px;display:flex;flex-direction:column;flex:1}
.post-card__body h3{font-size:1.12rem;margin-bottom:.4em}
.post-card__body h3 a{color:var(--navy)}
.post-card__body h3 a:hover{color:var(--accent-dark);text-decoration:none}
.post-card__excerpt{color:var(--muted);font-size:.92rem;margin:0 0 14px}
.post-card__meta{margin-top:auto;color:var(--muted);font-size:.8rem}

.post{max-width:820px;margin:0 auto;padding:48px 0}
.post__header{margin-bottom:26px}
.post__meta{color:var(--muted);font-size:.85rem;margin-bottom:10px}
.post__lead{font-size:1.15rem;color:var(--muted)}
.post__body{font-size:1.05rem}
.post__body h2{margin-top:1.6em;padding-top:.2em}
.post__body h3{margin-top:1.4em}
.post__body ul,.post__body ol{padding-left:1.3em;margin:0 0 1.1em}
.post__body li{margin-bottom:.5em}
.post__body table{width:100%;border-collapse:collapse;margin:1.4em 0;font-size:.95rem}
.post__body th,.post__body td{border:1px solid var(--line);padding:10px 13px;text-align:left;vertical-align:top}
.post__body thead th{background:var(--bg-soft);color:var(--navy)}
.post__body tbody tr:nth-child(even){background:var(--bg-soft)}
.post__body img{border-radius:var(--radius-sm);margin:1.2em 0}
.post__body a{color:var(--blue);text-decoration:underline}
.post__body blockquote{border-left:4px solid var(--accent);margin:1.4em 0;padding:6px 18px;color:var(--muted);background:var(--bg-soft)}

.toc{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:20px 24px;margin:0 0 30px}
.toc strong{display:block;color:var(--navy);margin-bottom:10px}
.toc ol{margin:0;padding-left:1.2em}
.toc ol ol{margin:.3em 0 .3em}
.toc li{margin:.25em 0}
.toc a{color:var(--ink)}
.toc a:hover{color:var(--accent-dark)}

.post-footer-cta{background:var(--accent-soft);border:1px solid #ffd9c2;border-radius:var(--radius);padding:24px;
  margin-top:36px;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.post-footer-cta h3{margin:0 0 .2em}
.post-footer-cta p{margin:0;color:var(--muted)}

/* ---------- CTA band ---------- */
.cta-band{background:var(--accent);color:#fff}
.cta-band__inner{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:38px 0;flex-wrap:wrap}
.cta-band h2{color:#fff;margin:0 0 .2em}
.cta-band p{margin:0;color:#fff;opacity:.92}
.cta-band__actions{display:flex;gap:12px;flex-wrap:wrap}
.cta-band .btn--accent{background:#fff;color:var(--accent-dark);border-color:#fff}
.cta-band .btn--accent:hover{background:#fff;color:var(--accent-dark)}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy);color:#aebccb;font-size:.92rem}
.footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:30px;padding:54px 0 40px}
.brand--footer .brand__text strong{color:#fff;font-size:1.2rem}
.brand--footer .brand__text small{color:#8298ad}
.footer__about{margin-top:14px;color:#8fa1b3;font-size:.88rem}
.site-footer h3{color:#fff;font-size:1rem;margin-bottom:14px}
.footer__links,.footer__contacts{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.footer__links a,.footer__contacts a{color:#aebccb}
.footer__links a:hover,.footer__contacts a:hover{color:#fff}
.footer__messengers{display:flex;gap:12px;margin-top:14px}
.footer__messengers a{color:#fff;border:1px solid rgba(255,255,255,.25);padding:6px 14px;border-radius:8px;font-size:.85rem}
.footer__messengers a:hover{background:rgba(255,255,255,.1);text-decoration:none}
.footer__bottom{border-top:1px solid rgba(255,255,255,.1)}
.footer__bottom-inner{display:flex;justify-content:space-between;gap:16px;padding:18px 0;font-size:.8rem;color:#7e92a6;flex-wrap:wrap}

/* ---------- Utilities ---------- */
.text-center{text-align:center}
.mt-0{margin-top:0}.mb-0{margin-bottom:0}
.lead{font-size:1.12rem;color:var(--muted)}
.prose{max-width:820px}
.prose h2{margin-top:1.4em}
.prose ul{padding-left:1.2em}
.divider{height:1px;background:var(--line);margin:40px 0;border:0}

/* ---------- Responsive ---------- */
@media(max-width:980px){
  .grid--4{grid-template-columns:repeat(2,1fr)}
  .steps--row{grid-template-columns:repeat(2,1fr)}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .post-grid{grid-template-columns:repeat(2,1fr)}
  .hero__inner{grid-template-columns:1fr}
  .calc{grid-template-columns:1fr}
  .calc__result{position:static}
}
@media(max-width:860px){
  .header__phone{display:none}
  .nav-toggle{display:flex}
  .nav{position:fixed;inset:74px 0 auto 0;background:#fff;border-bottom:1px solid var(--line);
    margin:0;max-height:calc(100vh - 74px);overflow:auto;transform:translateY(-130%);transition:.25s;box-shadow:var(--shadow)}
  .nav.is-open{transform:translateY(0)}
  .nav__list{flex-direction:column;gap:0;padding:10px 16px}
  .nav__link{padding:13px 8px;border-bottom:1px solid var(--line)}
  .nav__sub{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;padding:0 0 8px 14px}
  .grid--2,.grid--3,.grid--4,.split,.contact-grid,.calc{grid-template-columns:1fr}
  .gallery,.post-grid,.steps--row{grid-template-columns:1fr}
  .section{padding:46px 0}
}
@media(max-width:560px){
  body{font-size:16px}
  .hero__stats{gap:18px}
}