:root {
  --bg: #f7f8fa; --card: #ffffff; --text: #1d2433; --muted: #5b6475;
  --brand: #128c5e; --brand-ink: #ffffff; --brand-soft: #e3f4ec; --line: #e4e7ec;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f141b; --card: #171e28; --text: #e8ecf2; --muted: #9aa4b5; --brand: #3ccf8e; --brand-ink: #0f141b; --brand-soft: #16302a; --line: #263042; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--brand); }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }
header { border-bottom: 1px solid var(--line); background: var(--card); }
header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-top: 14px; padding-bottom: 14px; flex-wrap: wrap; }
.logo { font-weight: 800; font-size: 20px; color: var(--text); text-decoration: none; }
.logo span { color: var(--brand); }
nav a { margin-left: 16px; color: var(--muted); text-decoration: none; font-size: 15px; }
nav a:first-child { margin-left: 0; }
.hero { padding: 64px 0 40px; }
.hero h1 { font-size: clamp(28px, 5vw, 44px); line-height: 1.15; margin: 0 0 16px; }
.hero p { font-size: 18px; color: var(--muted); max-width: 640px; margin: 0 0 28px; }
.btn { display: inline-block; background: var(--brand); color: var(--brand-ink); padding: 12px 22px; border-radius: 10px; text-decoration: none; font-weight: 600; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin: 24px 0 48px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 20px; }
.card h3 { margin: 0 0 6px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
h2 { font-size: 26px; margin: 40px 0 8px; }
.steps { counter-reset: s; list-style: none; padding: 0; }
.steps li { counter-increment: s; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px 14px 56px; margin-bottom: 10px; position: relative; }
.steps li::before { content: counter(s); position: absolute; left: 16px; top: 13px; width: 28px; height: 28px; border-radius: 50%; background: var(--brand-soft); color: var(--brand); font-weight: 700; text-align: center; line-height: 28px; }
.doc { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 8px 28px 28px; margin: 32px 0 48px; }
.doc h1 { font-size: 30px; }
.doc h2 { font-size: 20px; margin-top: 28px; }
.doc li { margin-bottom: 6px; }
.small { color: var(--muted); font-size: 14px; }
footer { border-top: 1px solid var(--line); background: var(--card); padding: 24px 0; color: var(--muted); font-size: 14px; }
footer p { margin: 4px 0; }
@media (max-width: 480px) { .doc { padding: 4px 16px 20px; } nav a { margin-left: 10px; } }