:root {
  --bg: #0b1220;
  --bg2: #111a2b;
  --panel: #162033;
  --panel-2: #1c2a42;
  --border: #2a3b57;
  --text: #e8eef8;
  --muted: #93a4c3;
  --accent: #3d8bfd;
  --accent-2: #5aa2ff;
  --good: #3dd68c;
  --warn: #f0b429;
  --bad: #ff6b6b;
  --radius: 14px;
  --shadow: 0 18px 50px rgba(0,0,0,.35);
  --max: 1120px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { display: block; max-width: 100%; }
.wrap { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }
.muted { color: var(--muted); }
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid var(--border); background: rgba(61,139,253,.08);
  color: var(--accent-2); border-radius: 999px; padding: 4px 10px; font-size: .78rem; font-weight: 600;
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 0; border-radius: 10px; padding: 11px 18px; font-weight: 650; cursor: pointer;
  background: var(--accent); color: #fff; text-decoration: none; font-size: .95rem;
}
.btn:hover { background: var(--accent-2); text-decoration: none; }
.btn.secondary {
  background: transparent; color: var(--text); border: 1px solid var(--border);
}
.btn.secondary:hover { border-color: var(--accent); color: #fff; }
.btn.ghost { background: transparent; border: 1px solid transparent; color: var(--muted); }
.btn.block { width: 100%; }

/* nav */
.nav {
  position: sticky; top: 0; z-index: 40;
  backdrop-filter: blur(12px); background: rgba(11,18,32,.82);
  border-bottom: 1px solid rgba(42,59,87,.7);
}
.nav-inner { display: flex; align-items: center; gap: 16px; padding: 12px 0; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 750; text-decoration: none; }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 32px; height: 32px; border-radius: 9px;
  background: linear-gradient(135deg, #3d8bfd, #1f4f9c);
  display: grid; place-items: center; box-shadow: 0 8px 20px rgba(61,139,253,.35);
}
.nav-links { display: flex; gap: 4px; flex: 1; flex-wrap: wrap; }
.nav-links a {
  color: var(--muted); padding: 8px 10px; border-radius: 8px; font-size: .9rem; text-decoration: none;
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,.04); }
.nav-actions { display: flex; gap: 8px; align-items: center; }
.nav-toggle {
  display: none; background: transparent; border: 1px solid var(--border); color: var(--text);
  border-radius: 8px; padding: 8px 10px; cursor: pointer;
}

/* hero */
.hero {
  padding: 56px 0 40px;
  background:
    radial-gradient(900px 420px at 15% -10%, rgba(61,139,253,.28), transparent 60%),
    radial-gradient(700px 380px at 90% 10%, rgba(61,214,140,.12), transparent 55%),
    linear-gradient(180deg, #0d1526 0%, var(--bg) 100%);
}
.hero-grid {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 36px; align-items: center;
}
.hero h1 {
  font-size: clamp(1.8rem, 3.4vw, 2.75rem); line-height: 1.18; margin: 14px 0 14px; letter-spacing: -.02em;
}
.hero .lead { color: var(--muted); font-size: 1.05rem; margin: 0 0 22px; max-width: 38rem; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 18px; }
.hero-points { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; color: var(--muted); font-size: .92rem; }
.hero-points li { display: flex; gap: 8px; align-items: flex-start; }
.hero-points svg { flex: 0 0 auto; margin-top: 3px; }

.mock {
  background: linear-gradient(180deg, var(--panel), var(--bg2));
  border: 1px solid var(--border); border-radius: 18px; box-shadow: var(--shadow);
  overflow: hidden;
}
.mock-top {
  display: flex; align-items: center; gap: 8px; padding: 12px 14px; border-bottom: 1px solid var(--border);
  color: var(--muted); font-size: .78rem;
}
.mock-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--good); box-shadow: 0 0 0 4px rgba(61,214,140,.15); }
.mock-body { padding: 14px; display: grid; gap: 10px; }
.mock-row { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 8px; }
.mock-card {
  background: rgba(255,255,255,.03); border: 1px solid var(--border); border-radius: 12px; padding: 10px 12px;
}
.mock-card .l { color: var(--muted); font-size: .72rem; }
.mock-card .v { font-weight: 700; font-variant-numeric: tabular-nums; margin-top: 2px; }
.mock-card .up { color: var(--good); }
.mock-card .down { color: var(--bad); }
.mock-chart { height: 88px; border-radius: 12px; border: 1px solid var(--border); background: rgba(0,0,0,.18); padding: 8px; }
.mock-list { display: grid; gap: 6px; }
.mock-item {
  display: flex; justify-content: space-between; gap: 8px; font-size: .8rem;
  padding: 8px 10px; border-radius: 10px; background: rgba(255,255,255,.03); border: 1px solid var(--border);
}

.section { padding: 64px 0; }
.section.alt { background: linear-gradient(180deg, rgba(22,32,51,.55), transparent); }
.section-head { max-width: 640px; margin-bottom: 28px; }
.section-head h2 { margin: 0 0 10px; font-size: clamp(1.4rem, 2.4vw, 1.9rem); letter-spacing: -.01em; }
.section-head p { margin: 0; color: var(--muted); }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.step {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px;
}
.step .n {
  width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center;
  background: rgba(61,139,253,.15); color: var(--accent-2); font-weight: 700; font-size: .85rem; margin-bottom: 12px;
}
.step h3 { margin: 0 0 8px; font-size: 1rem; }
.step p { margin: 0; color: var(--muted); font-size: .9rem; }

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.feature {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px;
}
.feature .ico {
  width: 38px; height: 38px; border-radius: 11px; display: grid; place-items: center;
  background: rgba(61,139,253,.12); margin-bottom: 12px; color: var(--accent-2);
}
.feature h3 { margin: 0 0 8px; font-size: 1.02rem; }
.feature p { margin: 0; color: var(--muted); font-size: .9rem; }

.platforms { display: grid; grid-template-columns: 1.1fr .9fr; gap: 18px; }
.platform-card, .broker-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px;
}
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.chip {
  border: 1px solid var(--border); border-radius: 999px; padding: 6px 11px; color: var(--muted); font-size: .82rem;
  background: rgba(255,255,255,.03);
}

.pricing { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.price-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px;
  display: flex; flex-direction: column; gap: 10px; position: relative;
}
.price-card.featured { border-color: color-mix(in srgb, var(--accent) 55%, var(--border)); box-shadow: 0 0 0 1px rgba(61,139,253,.25); }
.price-card .tag {
  position: absolute; top: 12px; right: 12px; font-size: .7rem; color: var(--warn);
  border: 1px solid rgba(240,180,41,.35); background: rgba(240,180,41,.08); border-radius: 999px; padding: 2px 8px;
}
.price-card h3 { margin: 0; font-size: 1.05rem; }
.price-card .price { font-size: 1.6rem; font-weight: 780; letter-spacing: -.02em; }
.price-card .price small { font-size: .85rem; color: var(--muted); font-weight: 500; }
.price-card ul { margin: 0; padding-left: 1.1rem; color: var(--muted); font-size: .88rem; flex: 1; }
.price-note { margin-top: 14px; color: var(--muted); font-size: .85rem; }

.faq { display: grid; gap: 10px; max-width: 820px; }
.faq details {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px;
}
.faq summary { cursor: pointer; font-weight: 650; }
.faq p { margin: 10px 0 0; color: var(--muted); font-size: .92rem; }

.cta-band {
  background: linear-gradient(135deg, rgba(61,139,253,.18), rgba(61,214,140,.08));
  border: 1px solid var(--border); border-radius: 18px; padding: 28px; display: grid;
  grid-template-columns: 1.3fr .7fr; gap: 18px; align-items: center;
}
.contact-list { display: grid; gap: 8px; color: var(--muted); font-size: .92rem; }
.contact-list strong { color: var(--text); }

.footer {
  border-top: 1px solid var(--border); padding: 28px 0 40px; color: var(--muted); font-size: .82rem;
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 18px; }
.footer h4 { margin: 0 0 8px; color: var(--text); font-size: .9rem; }
.footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.risk {
  margin-top: 18px; padding: 14px; border-radius: 12px; border: 1px solid rgba(240,180,41,.25);
  background: rgba(240,180,41,.06); color: #e6d3a0; font-size: .8rem;
}

@media (max-width: 960px) {
  .hero-grid, .platforms, .cta-band, .footer-grid { grid-template-columns: 1fr; }
  .steps, .features, .pricing { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
  .nav.open .nav-links {
    display: flex; flex-direction: column; position: absolute; left: 0; right: 0; top: 100%;
    background: var(--bg2); border-bottom: 1px solid var(--border); padding: 10px 16px 14px;
  }
  .nav-toggle { display: inline-flex; }
}
@media (max-width: 640px) {
  .steps, .features, .pricing, .mock-row { grid-template-columns: 1fr; }
  .hero { padding-top: 36px; }
}