:root {
  --bg: #f6fbff;
  --ink: #07172d;
  --muted: #607089;
  --blue: #1268ff;
  --cyan: #20c9ff;
  --green: #16bf8f;
  --line: #dce9f8;
  --card: #fff;
  --shadow: 0 24px 70px rgba(18, 104, 255, .16);
  --r: 28px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 12% 0, rgba(32, 201, 255, .22), transparent 34%), radial-gradient(circle at 90% 10%, rgba(18, 104, 255, .18), transparent 38%), linear-gradient(180deg, #f8fcff, #eef7ff 55%, #fff);
  line-height: 1.72;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.container { width: min(1180px, calc(100% - 40px)); margin: auto; }
.topbar { position: sticky; top: 0; z-index: 10; background: rgba(255, 255, 255, .84); backdrop-filter: blur(18px); border-bottom: 1px solid var(--line); }
.nav { height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 900; }
.logo { width: 42px; height: 42px; border-radius: 15px; background: linear-gradient(135deg, var(--blue), var(--cyan)); color: #fff; display: grid; place-items: center; box-shadow: 0 14px 34px rgba(18, 104, 255, .28); }
.links { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.links a, .lang, .pill { padding: 9px 13px; border-radius: 999px; background: #eef6ff; color: #2361bc; font-size: 14px; font-weight: 800; }
.hero { padding: 86px 0 52px; }
.hero-grid, .workflow { display: grid; grid-template-columns: 1.04fr .96fr; gap: 42px; align-items: center; }
.eyebrow { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 18px; }
.eyebrow span { padding: 7px 12px; border-radius: 999px; border: 1px solid rgba(18, 104, 255, .18); background: rgba(255, 255, 255, .75); color: var(--blue); font-weight: 900; font-size: 13px; }
h1 { font-size: clamp(40px, 6vw, 72px); line-height: 1.03; letter-spacing: -.06em; margin: 0 0 22px; }
h2 { font-size: clamp(28px, 4vw, 44px); line-height: 1.12; letter-spacing: -.04em; margin: 0; }
.lead, .section-title p, .card p, .footer { color: var(--muted); }
.lead { font-size: 19px; max-width: 720px; margin: 0 0 30px; }
.actions { display: flex; gap: 14px; flex-wrap: wrap; margin: 24px 0; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 13px 20px; border-radius: 999px; font-weight: 900; border: 1px solid var(--line); }
.btn-primary { border: 0; color: #fff; background: linear-gradient(135deg, var(--blue), var(--cyan)); box-shadow: 0 16px 42px rgba(18, 104, 255, .28); }
.btn-soft { background: #fff; color: var(--blue); }
.device, .card { background: rgba(255, 255, 255, .9); border: 1px solid var(--line); border-radius: var(--r); box-shadow: var(--shadow); }
.device { padding: 18px; }
.device img, .reco img { border-radius: 22px; aspect-ratio: 16 / 10; object-fit: cover; }
.trust, .grid { display: grid; gap: 18px; }
.trust { grid-template-columns: repeat(3, 1fr); margin-top: 22px; }
.trust .card { padding: 18px; }
.trust strong { display: block; font-size: 28px; }
.section { padding: 58px 0; }
.section-title { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card { padding: 24px; }
.card h3 { margin: 0 0 8px; font-size: 20px; }
.icon { width: 42px; height: 42px; border-radius: 14px; background: #edf6ff; color: var(--blue); display: grid; place-items: center; font-weight: 900; margin-bottom: 14px; }
.status { color: var(--green); font-weight: 900; }
.codebox { background: #07172d; color: #dff7ff; border-radius: var(--r); padding: 24px; font-family: Consolas, monospace; overflow: auto; }
.codebox span { color: #58dcff; }
.list { display: grid; gap: 12px; margin-top: 18px; }
.list div, .notice { padding: 14px 16px; border-radius: 16px; background: #f0f7ff; color: #35516e; }
.notice { border-left: 4px solid #ff8a3d; background: #fff7ee; color: #89501e; }
.step { position: relative; padding-left: 66px; }
.step::before { content: attr(data-step); position: absolute; left: 22px; top: 24px; width: 30px; height: 30px; border-radius: 50%; background: var(--blue); color: #fff; display: grid; place-items: center; font-weight: 900; }
.faq details { padding: 20px 22px; border: 1px solid var(--line); border-radius: 20px; background: #fff; }
.faq summary { cursor: pointer; font-weight: 900; }
.cta { padding: 72px 0; }
.cta-box { text-align: center; padding: 54px 24px; border-radius: 38px; color: #fff; background: linear-gradient(135deg, var(--blue), var(--cyan)); box-shadow: 0 30px 90px rgba(18, 104, 255, .3); }
.cta-box h2 { font-size: clamp(32px, 5vw, 54px); margin: 0 0 12px; }
.cta-box p { max-width: 650px; margin: 0 auto 22px; opacity: .92; }
.footer { padding: 42px 0; border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: 1.3fr repeat(5, 1fr); gap: 22px; }
.footer h4 { margin: 0 0 10px; color: var(--ink); }
.footer a { display: block; margin: 7px 0; }
@media (max-width: 900px) {
  .links { display: none; }
  .hero-grid, .workflow, .grid-2, .grid-3, .grid-4, .footer-grid, .trust { grid-template-columns: 1fr; }
  h1 { font-size: 42px; }
}