html { color-scheme: light; }
:root {
  --bg: #ffffff;
  --bg-soft: #f5f7fa;
  --text: #0f172a;
  --muted: #475569;
  --line: #e2e8f0;
  --accent: #1d4ed8;
  --accent-soft: #e8eefc;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  font-size: 17px;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }

header.site {
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0;
  background: var(--bg);
  z-index: 10;
}
header.site .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 19px; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand svg { width: 28px; height: 28px; }
nav a { color: var(--muted); margin-left: 22px; font-size: 15px; }
nav a:hover { color: var(--text); text-decoration: none; }

.hero { padding: 88px 0 72px; background: var(--bg-soft); border-bottom: 1px solid var(--line); }
.hero h1 { font-size: clamp(32px, 5vw, 48px); line-height: 1.15; margin: 0 0 18px; letter-spacing: -0.02em; max-width: 760px; }
.hero p { font-size: 19px; color: var(--muted); max-width: 640px; margin: 0 0 28px; }
.btn {
  display: inline-block; background: var(--accent); color: #fff;
  padding: 12px 22px; border-radius: 8px; font-weight: 600; font-size: 16px;
}
.btn:hover { text-decoration: none; opacity: .92; }

section { padding: 72px 0; }
section + section { border-top: 1px solid var(--line); }
h2 { font-size: 28px; margin: 0 0 12px; letter-spacing: -0.01em; }
.lead { color: var(--muted); max-width: 680px; margin: 0 0 36px; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 820px) { .grid { grid-template-columns: 1fr; } }
.card { border: 1px solid var(--line); border-radius: 12px; padding: 24px; background: var(--bg); }
.card .ico {
  width: 40px; height: 40px; border-radius: 10px; background: var(--accent-soft); color: var(--accent);
  display: flex; align-items: center; justify-content: center; margin-bottom: 14px;
}
.card .ico svg { width: 22px; height: 22px; }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 16px; }

.two { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
@media (max-width: 820px) { .two { grid-template-columns: 1fr; gap: 24px; } }
.steps { list-style: none; padding: 0; margin: 0; }
.steps li { padding: 14px 0; border-bottom: 1px solid var(--line); }
.steps li:last-child { border-bottom: 0; }
.steps strong { display: block; }
.steps span { color: var(--muted); font-size: 16px; }

.contact { background: var(--bg-soft); }
.contact dl { margin: 0; display: grid; grid-template-columns: 160px 1fr; gap: 10px 20px; }
@media (max-width: 560px) { .contact dl { grid-template-columns: 1fr; gap: 2px 0; } .contact dd { margin-bottom: 12px; } }
.contact dt { color: var(--muted); }
.contact dd { margin: 0; }

footer.site { border-top: 1px solid var(--line); padding: 28px 0; color: var(--muted); font-size: 14px; }
footer.site .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

.doc { padding: 56px 0 72px; }
.doc .wrap { max-width: 760px; }
.doc h1 { font-size: 34px; margin: 0 0 6px; }
.doc .meta { color: var(--muted); margin: 0 0 32px; }
.doc h2 { font-size: 21px; margin: 32px 0 8px; }
.doc p, .doc li { color: var(--text); }