:root {
  --bg: #f7f8fc;
  --surface: #fff;
  --text: #171821;
  --muted: #656b78;
  --line: #e4e7ef;
  --accent: #6c3cff;
  --accent-dark: #4f22d6;
  --shadow: 0 18px 50px rgba(30,25,60,.09);
  --radius: 22px;
  --max: 1160px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: radial-gradient(circle at 50% -15%, rgba(108,60,255,.12), transparent 34rem), var(--bg);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
.site-header, main { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.site-header { padding: 24px 0 8px; }
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--text); text-decoration: none; font-size: 1.25rem; font-weight: 800;
}
.brand-mark {
  display: grid; place-items: center; width: 38px; height: 38px;
  color: #fff; background: linear-gradient(145deg,#7a4cff,#5020df);
  border-radius: 12px; box-shadow: 0 8px 18px rgba(108,60,255,.28);
}
.hero { max-width: 820px; margin: 60px auto 34px; text-align: center; }
.eyebrow {
  margin: 0 0 12px; color: var(--accent-dark); font-size: .86rem;
  font-weight: 800; letter-spacing: .09em; text-transform: uppercase;
}
h1 { margin: 0; font-size: clamp(2.15rem,6vw,4.4rem); line-height: 1.03; letter-spacing: -.055em; }
.lead { max-width: 700px; margin: 22px auto 0; color: var(--muted); font-size: clamp(1.05rem,2.1vw,1.28rem); }
.advertising-label { margin: 0 4px 8px; color: var(--muted); font-size: .77rem; }
.iframe-shell {
  overflow: hidden; padding: 14px; background: var(--surface);
  border: 1px solid rgba(108,60,255,.22); border-radius: var(--radius); box-shadow: var(--shadow);
}
.iframe-shell iframe {
  display: block; width: 100% !important; min-height: 610px;
  border: 0; border-radius: 14px; background: #fff;
}
.iframe-placeholder {
  position: relative; overflow: hidden; min-height: 540px;
  display: grid; place-items: center; background: #fff; border-radius: 14px;
}
.iframe-placeholder img { display: block; width: 100%; height: auto; max-width: 907px; opacity: .58; filter: saturate(.8); }
.placeholder-message {
  position: absolute; left: 50%; bottom: 24px; transform: translateX(-50%);
  width: min(560px,calc(100% - 36px)); display: grid; gap: 4px; padding: 15px 18px;
  color: #fff; text-align: center; background: rgba(23,24,33,.92);
  border-radius: 14px; backdrop-filter: blur(8px);
}
.placeholder-message span { color: rgba(255,255,255,.78); font-size: .88rem; }
.partner-note { max-width: 900px; margin: 14px auto 0; color: var(--muted); text-align: center; font-size: .84rem; }
.native-content, .faq { margin: 88px auto 0; }
.native-content h2, .faq h2 {
  margin: 0 0 28px; text-align: center; font-size: clamp(1.7rem,3.5vw,2.45rem); letter-spacing: -.035em;
}
.steps { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.steps article { padding: 26px; background: var(--surface); border: 1px solid var(--line); border-radius: 18px; }
.steps article > span {
  display: grid; place-items: center; width: 38px; height: 38px; margin-bottom: 18px;
  color: #fff; background: var(--accent); border-radius: 50%; font-weight: 800;
}
.steps h3 { margin: 0 0 8px; font-size: 1.08rem; }
.steps p { margin: 0; color: var(--muted); font-size: .95rem; }
.faq { max-width: 880px; margin-bottom: 90px; }
details { margin-top: 12px; padding: 0 22px; background: var(--surface); border: 1px solid var(--line); border-radius: 16px; }
summary { cursor: pointer; padding: 20px 34px 20px 0; font-weight: 750; }
details p { margin: 0; padding: 0 0 20px; color: var(--muted); }
.site-footer {
  padding: 38px max(20px,calc((100% - var(--max))/2));
  color: #d9dce5; background: #171821;
}
.site-footer strong { color: #fff; font-size: 1.08rem; }
.site-footer p { margin: 6px 0 0; color: #9ba0af; }
.copyright { margin-top: 26px !important; padding-top: 20px; border-top: 1px solid #30323d; font-size: .85rem; }
.visually-hidden {
  position: absolute !important; width: 1px !important; height: 1px !important;
  padding: 0 !important; margin: -1px !important; overflow: hidden !important;
  clip: rect(0,0,0,0) !important; white-space: nowrap !important; border: 0 !important;
}
@media (max-width: 780px) {
  .site-header, main { width: min(100% - 24px,var(--max)); }
  .hero { margin-top: 38px; }
  .iframe-shell { padding: 6px; border-radius: 16px; }
  .iframe-shell iframe { min-height: 760px; }
  .iframe-placeholder { min-height: 420px; }
  .steps { grid-template-columns: 1fr; }
  .native-content, .faq { margin-top: 64px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }