:root {
    --c-bg: #ffffff;
    --c-bg-muted: #f4f6fa;
    --c-ink: #131a2b;
    --c-ink-soft: #475066;
    --c-brand: #1f5fd6;
    --c-brand-dark: #1647a3;
    --c-accent: #f5a623;
    --c-line: #e2e7f0;
    --c-dark: #0f1626;
    --radius: 14px;
    --shadow: 0 18px 40px -22px rgba(19, 26, 43, .35);
    --maxw: 1180px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: var(--font);
    color: var(--c-ink);
    background: var(--c-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

.container {
    width: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 26px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 15px;
    border: 1.5px solid transparent;
    cursor: pointer;
    transition: transform .15s ease, background .2s ease, box-shadow .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--c-brand); color: #fff; box-shadow: 0 12px 24px -12px var(--c-brand); }
.btn--primary:hover { background: var(--c-brand-dark); }
.btn--ghost { border-color: var(--c-line); color: var(--c-ink); background: #fff; }
.btn--ghost:hover { border-color: var(--c-brand); color: var(--c-brand); }
.btn--block { width: 100%; }

/* ---------- Header ---------- */
.header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, .9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--c-line);
}
.header__inner {
    display: flex;
    align-items: center;
    gap: 28px;
    height: 72px;
}
.logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; }
.logo__mark {
    width: 26px; height: 26px; border-radius: 7px;
    background: linear-gradient(135deg, var(--c-brand), var(--c-accent));
    box-shadow: inset 0 0 0 4px rgba(255,255,255,.25);
}
.logo__text strong { color: var(--c-brand); }
.logo--light { color: #fff; }
.logo--light .logo__text strong { color: var(--c-accent); }

.nav { display: flex; gap: 26px; margin-left: auto; }
.nav a { color: var(--c-ink-soft); font-weight: 500; font-size: 15px; transition: color .2s; }
.nav a:hover { color: var(--c-brand); }
.header__phone { font-weight: 700; font-size: 16px; white-space: nowrap; }
.header__phone:hover { color: var(--c-brand); }

.burger { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.burger span { width: 24px; height: 2px; background: var(--c-ink); border-radius: 2px; transition: .25s; }

/* ---------- Hero ---------- */
.hero {
    background:
        radial-gradient(1100px 480px at 85% -10%, rgba(31,95,214,.16), transparent 60%),
        radial-gradient(700px 360px at 0% 110%, rgba(245,166,35,.12), transparent 60%),
        var(--c-bg-muted);
    padding: 84px 0 72px;
}
.hero__eyebrow {
    text-transform: uppercase;
    letter-spacing: .12em;
    font-size: 13px;
    font-weight: 700;
    color: var(--c-brand);
    margin: 0 0 16px;
}
.hero__title { font-size: clamp(34px, 5.5vw, 58px); line-height: 1.08; margin: 0 0 20px; letter-spacing: -.02em; }
.hero__lead { font-size: 19px; color: var(--c-ink-soft); max-width: 620px; margin: 0 0 32px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 52px; }
.hero__stats { list-style: none; display: flex; flex-wrap: wrap; gap: 44px; padding: 0; margin: 0; }
.hero__stats strong { display: block; font-size: 30px; color: var(--c-ink); }
.hero__stats span { color: var(--c-ink-soft); font-size: 15px; }

/* ---------- Sections ---------- */
.section { padding: 80px 0; }
.section--muted { background: var(--c-bg-muted); }
.section--dark { background: var(--c-dark); color: #fff; }
.section__head { max-width: 680px; margin: 0 auto 48px; text-align: center; }
.section__eyebrow {
    text-transform: uppercase; letter-spacing: .12em; font-size: 13px; font-weight: 700;
    color: var(--c-brand); margin: 0 0 12px;
}
.section--dark .section__eyebrow { color: var(--c-accent); }
.section__title { font-size: clamp(26px, 3.6vw, 38px); line-height: 1.15; margin: 0 0 14px; letter-spacing: -.01em; }
.section__subtitle { color: var(--c-ink-soft); font-size: 17px; margin: 0; }

/* ---------- Cards ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card {
    background: #fff;
    border: 1px solid var(--c-line);
    border-radius: var(--radius);
    padding: 30px 26px;
    transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: transparent; }
.card__icon {
    width: 54px; height: 54px; border-radius: 12px; display: grid; place-items: center;
    font-size: 26px; background: var(--c-bg-muted); margin-bottom: 18px;
}
.card__title { font-size: 20px; margin: 0 0 10px; color: var(--c-ink); }
.card p { margin: 0; color: var(--c-ink-soft); font-size: 15px; }
a.card { color: inherit; display: flex; flex-direction: column; }
.card__more { margin-top: 16px; color: var(--c-brand); font-weight: 600; font-size: 15px; }
.section__foot { text-align: center; margin-top: 40px; }

/* ---------- Features ---------- */
.features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.feature {
    background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
    padding: 28px; display: flex; flex-direction: column; gap: 8px;
}
.feature__num { font-size: 14px; font-weight: 800; color: var(--c-accent); letter-spacing: .1em; }
.feature h3 { margin: 0; font-size: 19px; }
.feature p { margin: 0; color: var(--c-ink-soft); font-size: 15px; }

/* ---------- About ---------- */
.about { display: grid; grid-template-columns: 1.6fr 1fr; gap: 40px; align-items: start; }
.about__text p { color: var(--c-ink-soft); font-size: 16px; }
.about__list { margin: 22px 0 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.about__list li { position: relative; padding-left: 30px; color: var(--c-ink); }
.about__list li::before {
    content: "✓"; position: absolute; left: 0; top: 0;
    color: var(--c-brand); font-weight: 800;
}
.about__cta {
    background: var(--c-dark); color: #fff; border-radius: var(--radius);
    padding: 32px; position: sticky; top: 96px;
}
.about__cta h3 { margin: 0 0 10px; font-size: 22px; }
.about__cta p { margin: 0 0 22px; color: #c4ccdc; }

/* ---------- Contacts ---------- */
.contacts { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.contacts__lead { color: #c4ccdc; font-size: 17px; }
.contacts__list { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 20px; }
.contacts__list li { display: grid; gap: 4px; }
.contacts__list span { font-size: 13px; text-transform: uppercase; letter-spacing: .1em; color: #8d97ad; }
.contacts__list a, .contacts__list address, .contacts__list time { font-size: 19px; font-style: normal; color: #fff; }
.contacts__list a:hover { color: var(--c-accent); }

.contacts__form { background: #fff; color: var(--c-ink); border-radius: var(--radius); padding: 32px; }
.contacts__form h3 { margin: 0 0 20px; font-size: 22px; }
.contacts__form label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 16px; }
.contacts__form input, .contacts__form textarea {
    width: 100%; margin-top: 7px; padding: 12px 14px; font: inherit;
    border: 1.5px solid var(--c-line); border-radius: 10px; background: var(--c-bg-muted);
    transition: border-color .2s, background .2s;
}
.contacts__form input:focus, .contacts__form textarea:focus {
    outline: none; border-color: var(--c-brand); background: #fff;
}
.contacts__form textarea { resize: vertical; }
.contacts__note { font-size: 12.5px; color: var(--c-ink-soft); margin: 14px 0 0; text-align: center; }

/* ---------- Footer ---------- */
.footer { background: #0b101c; color: #c4ccdc; padding-top: 56px; }
.footer__inner { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; padding-bottom: 44px; }
.footer__col h4 { color: #fff; font-size: 16px; margin: 0 0 16px; }
.footer__col a, .footer__col address { display: block; color: #c4ccdc; font-style: normal; margin-bottom: 10px; transition: color .2s; }
.footer__col a:hover { color: var(--c-accent); }
.footer__about { margin: 14px 0 0; max-width: 280px; }
.footer__bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 20px 0; font-size: 14px; }
.footer__bottom p { margin: 0; }

/* ---------- Breadcrumbs ---------- */
.crumbs { font-size: 14px; color: var(--c-ink-soft); margin: 0 0 18px; }
.crumbs a { color: var(--c-ink-soft); }
.crumbs a:hover { color: var(--c-brand); }
.crumbs span { color: var(--c-ink); }

/* ---------- Service hero ---------- */
.svc-hero {
    background:
        radial-gradient(900px 420px at 90% -20%, rgba(31,95,214,.14), transparent 60%),
        var(--c-bg-muted);
    padding: 56px 0 60px;
}
.svc-hero__icon {
    width: 64px; height: 64px; border-radius: 16px; display: grid; place-items: center;
    font-size: 32px; background: #fff; box-shadow: var(--shadow); margin-bottom: 20px;
}
.svc-hero h1 { font-size: clamp(30px, 4.6vw, 46px); line-height: 1.1; margin: 0 0 16px; letter-spacing: -.02em; }
.svc-hero__lead { font-size: 19px; color: var(--c-ink-soft); max-width: 660px; margin: 0 0 28px; }

/* ---------- Service content ---------- */
.svc-layout { display: grid; grid-template-columns: 1fr 340px; gap: 48px; align-items: start; }
.svc-main h2 { font-size: 26px; margin: 0 0 16px; letter-spacing: -.01em; }
.svc-main h2:not(:first-child) { margin-top: 44px; }
.svc-main p { color: var(--c-ink-soft); font-size: 16px; }

.svc-list { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 12px; }
.svc-list li { position: relative; padding-left: 30px; }
.svc-list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--c-brand); font-weight: 800; }

.steps { counter-reset: step; display: grid; gap: 16px; margin: 22px 0 0; padding: 0; list-style: none; }
.steps li {
    counter-increment: step; position: relative; padding: 18px 18px 18px 64px;
    background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
}
.steps li::before {
    content: counter(step); position: absolute; left: 18px; top: 18px;
    width: 32px; height: 32px; border-radius: 9px; display: grid; place-items: center;
    background: var(--c-brand); color: #fff; font-weight: 700; font-size: 15px;
}
.steps strong { display: block; margin-bottom: 2px; }
.steps span { color: var(--c-ink-soft); font-size: 15px; }

.specs { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin: 18px 0 0; }
.specs div { background: var(--c-bg-muted); border-radius: 12px; padding: 18px; }
.specs dt { font-size: 13px; text-transform: uppercase; letter-spacing: .08em; color: var(--c-ink-soft); }
.specs dd { margin: 6px 0 0; font-size: 22px; font-weight: 700; }

/* Sidebar */
.svc-aside { position: sticky; top: 96px; display: grid; gap: 20px; }
.svc-card {
    background: var(--c-dark); color: #fff; border-radius: var(--radius); padding: 28px;
}
.svc-card h3 { margin: 0 0 8px; font-size: 21px; }
.svc-card p { margin: 0 0 20px; color: #c4ccdc; font-size: 15px; }
.svc-card__contacts { display: grid; gap: 8px; margin-top: 18px; font-size: 15px; }
.svc-card__contacts a { color: #fff; font-weight: 600; }
.svc-card__contacts a:hover { color: var(--c-accent); }

.svc-related {
    background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 24px;
}
.svc-related h3 { margin: 0 0 14px; font-size: 17px; }
.svc-related a { display: block; padding: 8px 0; color: var(--c-ink-soft); border-top: 1px solid var(--c-line); }
.svc-related a:first-of-type { border-top: 0; }
.svc-related a:hover { color: var(--c-brand); }

/* Services hub */
.hub-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }

/* ---------- To top ---------- */
.to-top {
    position: fixed; right: 22px; bottom: 22px; width: 46px; height: 46px;
    border-radius: 50%; background: var(--c-brand); color: #fff; display: grid; place-items: center;
    font-size: 20px; box-shadow: var(--shadow); opacity: 0; pointer-events: none; transform: translateY(12px);
    transition: opacity .25s, transform .25s;
}
.to-top.is-visible { opacity: 1; pointer-events: auto; transform: translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
    .cards { grid-template-columns: repeat(2, 1fr); }
    .about { grid-template-columns: 1fr; }
    .about__cta { position: static; }
    .contacts { grid-template-columns: 1fr; gap: 32px; }
    .footer__inner { grid-template-columns: 1fr 1fr; }
    .svc-layout { grid-template-columns: 1fr; }
    .svc-aside { position: static; grid-template-columns: 1fr 1fr; }
    .hub-cards { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
    .nav, .header__phone { display: none; }
    .nav.is-open {
        display: flex; flex-direction: column; position: absolute; top: 72px; left: 0; right: 0;
        background: #fff; padding: 18px 24px; gap: 18px; border-bottom: 1px solid var(--c-line);
        box-shadow: var(--shadow);
    }
    .burger { display: flex; margin-left: auto; }
    .cards, .features { grid-template-columns: 1fr; }
    .footer__inner { grid-template-columns: 1fr; gap: 28px; }
    .specs { grid-template-columns: 1fr; }
    .hero { padding: 56px 0; }
    .hero__stats { gap: 28px; }
    .section { padding: 60px 0; }
}