:root {
  --ink: #0d2344;
  --muted: #667085;
  --line: #d8dee8;
  --paper: #f5f7fb;
  --white: #fff;
  --accent: #173f78;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}
a { color: inherit; }
.header, main, footer { max-width: 1180px; margin: 0 auto; }
.header {
  min-height: 88px;
  padding: 16px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; font-weight: 700; }
.brand img { width: 52px; height: 52px; object-fit: cover; object-position: 50% 22%; border-radius: 50%; }
.contact-link { text-decoration: none; border-bottom: 1px solid var(--ink); }
.hero {
  min-height: 570px;
  margin: 0 20px;
  padding: 70px;
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  align-items: center;
  gap: 60px;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 30px;
}
.eyebrow { margin: 0 0 16px; color: var(--accent); font-size: .78rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
h1 { max-width: 760px; margin: 0; font-size: clamp(2.35rem, 4.1vw, 4.35rem); line-height: 1.02; letter-spacing: -.05em; }
.lead { max-width: 680px; margin: 30px 0; color: var(--muted); font-size: 1.2rem; }
.button { display: inline-block; padding: 14px 22px; color: var(--white); background: var(--ink); border-radius: 10px; text-decoration: none; font-weight: 700; }
.hero-mark img { width: 124%; max-width: none; transform: translateX(-8%); mix-blend-mode: multiply; }
.section { margin: 24px 20px 0; padding: 70px; background: var(--white); border: 1px solid var(--line); border-radius: 30px; }
h2 { margin: 0 0 34px; font-size: clamp(2rem, 4vw, 3.5rem); line-height: 1.05; letter-spacing: -.04em; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { min-height: 250px; padding: 28px; background: var(--paper); border-radius: 18px; }
.card span { color: var(--muted); font-size: .8rem; }
.card h3 { margin: 58px 0 12px; font-size: 1.35rem; }
.card p, .about > p { color: var(--muted); }
.about, .contacts { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; }
.about h2, .contacts h2 { margin-bottom: 0; }
.about > p { margin: 30px 0 0; font-size: 1.15rem; }
.contact-card { padding: 28px; background: var(--paper); border-radius: 18px; }
.contact-card p { margin: 8px 0; }
footer { padding: 36px 28px 50px; color: var(--muted); font-size: .9rem; }
.requisites { margin-bottom: 32px; overflow: hidden; background: var(--white); border: 1px solid var(--line); border-radius: 18px; }
.requisites summary { padding: 20px 24px; display: flex; align-items: center; justify-content: space-between; color: var(--ink); cursor: pointer; font-weight: 700; list-style: none; }
.requisites summary::-webkit-details-marker { display: none; }
.requisites-action { color: var(--accent); font-size: .8rem; letter-spacing: .08em; text-transform: uppercase; }
.requisites[open] .requisites-action { font-size: 0; }
.requisites[open] .requisites-action::after { content: "Скрыть"; font-size: .8rem; }
.requisites-image { width: min(100%, 844px); aspect-ratio: 1 / 1; margin: 0 auto 26px; overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: 12px; }
.requisites-image img { display: block; width: 100%; height: auto; }
.footer-line { display: flex; justify-content: space-between; }

@media (max-width: 800px) {
  .hero, .about, .contacts { grid-template-columns: 1fr; }
  .hero { min-height: auto; padding: 44px 26px; }
  .hero-mark { display: none; }
  .section { padding: 44px 26px; }
  .cards { grid-template-columns: 1fr; }
  .card { min-height: 200px; }
  .card h3 { margin-top: 28px; }
  .footer-line { gap: 20px; flex-direction: column; }
  .requisites summary { padding: 18px; }
}