:root {
  --bg: #f4f6f9; --surface: #ffffff; --stroke: #e3e8ef;
  --ink: #0f1729; --secondary: #3d4b63; --muted: #87a4bc;
  --blue: #3b69f3; --blue-soft: #eaf0fe;
}
* { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif;
  margin: 0; background: var(--bg); color: var(--ink); line-height: 1.6;
}
a { color: var(--blue); text-decoration: none; }
.nav {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 960px; margin: 0 auto; padding: 18px 20px;
}
.nav .brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.1em; color: var(--ink); letter-spacing: -0.02em; }
.nav .brand img { width: 28px; height: 28px; border-radius: 7px; }
.nav .links { display: flex; gap: 22px; font-size: 0.92em; font-weight: 500; }
.nav .links a { color: var(--secondary); }
.nav .links a.active, .nav .links a:hover { color: var(--blue); }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 20px 64px; }
.prose { max-width: 720px; margin: 0 auto; padding: 8px 20px 64px; }
.prose h1 { font-size: 1.7em; letter-spacing: -0.02em; margin-bottom: 0.2em; }
.prose h2 { font-size: 1.2em; margin-top: 1.8em; }
.prose .meta { color: var(--muted); font-size: 0.95em; }
.prose ul { padding-left: 1.3em; }
.hero { text-align: center; padding: 64px 20px 40px; }
.hero img.mark { width: 96px; height: 96px; border-radius: 24px; box-shadow: 0 12px 40px rgba(59,105,243,.25); }
.hero h1 { font-size: clamp(2.1em, 5vw, 3.1em); letter-spacing: -0.035em; line-height: 1.1; margin: 24px 0 12px; }
.hero p.sub { color: var(--muted); font-size: 1.15em; max-width: 560px; margin: 0 auto; }
.badge { display: inline-flex; align-items: center; gap: 8px; margin-top: 28px; padding: 12px 22px;
  background: var(--ink); color: #fff; border-radius: 14px; font-weight: 600; font-size: 0.95em; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 14px; margin-top: 48px; }
.card { background: var(--surface); border: 1px solid var(--stroke); border-radius: 16px; padding: 22px; text-align: left; }
.card .ico { width: 40px; height: 40px; border-radius: 11px; background: var(--blue-soft); display: grid;
  place-items: center; color: var(--blue); font-size: 1.2em; margin-bottom: 12px; }
.card h3 { margin: 0 0 6px; font-size: 1.02em; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--secondary); font-size: 0.92em; }
.steps { counter-reset: step; margin: 40px auto 0; max-width: 640px; text-align: left; }
.step { display: flex; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--stroke); }
.step:last-child { border-bottom: 0; }
.step::before { counter-increment: step; content: counter(step);
  flex: none; width: 30px; height: 30px; border-radius: 999px; background: var(--blue); color: #fff;
  display: grid; place-items: center; font-weight: 700; font-size: 0.9em; }
.faq { max-width: 720px; margin: 0 auto; }
.faq h1 { letter-spacing: -0.02em; }
.faq details { background: var(--surface); border: 1px solid var(--stroke); border-radius: 14px;
  padding: 16px 18px; margin-bottom: 10px; }
.faq summary { font-weight: 600; cursor: pointer; }
.faq p { color: var(--secondary); margin: 10px 0 0; font-size: 0.95em; }
.contact { background: var(--blue-soft); border-radius: 16px; padding: 26px; text-align: center; margin: 36px 0 0; }
footer { border-top: 1px solid var(--stroke); margin-top: 24px; }
footer .inner { max-width: 960px; margin: 0 auto; padding: 26px 20px; display: flex; flex-wrap: wrap;
  gap: 14px; justify-content: space-between; color: var(--muted); font-size: 0.85em; }
footer a { color: var(--muted); margin-left: 16px; }
@media (max-width: 560px) { .nav .links { gap: 14px; } }

/* footer v2 */
footer { border-top: 1px solid var(--stroke); margin-top: 40px; background: var(--surface); }
.finner { max-width: 960px; margin: 0 auto; padding: 36px 20px 28px; display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 24px; }
.fbrand p { color: var(--muted); font-size: 0.88em; margin: 10px 0 0; max-width: 240px; }
.fcol h4 { margin: 0 0 10px; font-size: 0.8em; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.fcol a { display: block; color: var(--secondary); font-size: 0.92em; padding: 3px 0; margin: 0; }
.fcol a:hover { color: var(--blue); }
.fbar { border-top: 1px solid var(--stroke); }
.fbar .in { max-width: 960px; margin: 0 auto; padding: 14px 20px; display: flex;
  justify-content: space-between; flex-wrap: wrap; gap: 8px; color: var(--muted); font-size: 0.82em; }
@media (max-width: 680px) { .finner { grid-template-columns: 1fr 1fr; } }