:root {
  color-scheme: dark;
  --bg: #070a12;
  --surface: #101522;
  --surface-2: #151c2c;
  --text: #f7f8fc;
  --muted: #aeb8ca;
  --line: rgba(255, 255, 255, 0.1);
  --hot: #ff4164;
  --hot-2: #ff6a47;
  --cyan: #40d7d0;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 82% 4%, rgba(64, 215, 208, 0.1), transparent 28rem),
    radial-gradient(circle at 12% 18%, rgba(255, 65, 100, 0.12), transparent 30rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; }
.container { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(7, 10, 18, 0.82);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}
.nav { height: 72px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 750; letter-spacing: 0.02em; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--hot), var(--hot-2));
  box-shadow: 0 10px 34px rgba(255, 65, 100, 0.28);
  font-weight: 900;
}
.nav-links { display: flex; align-items: center; gap: 28px; color: var(--muted); }
.nav-links a:hover, .nav-links a:focus-visible { color: var(--text); }
.menu-button { display: none; border: 0; color: var(--text); background: transparent; padding: 8px; }

.hero { padding: 104px 0 88px; }
.eyebrow { margin: 0 0 16px; color: var(--cyan); font-weight: 750; letter-spacing: 0.14em; font-size: 0.82rem; }
h1 { margin: 0; max-width: 840px; font-size: clamp(2.8rem, 7vw, 5.8rem); line-height: 1.04; letter-spacing: -0.055em; }
.gradient-text { background: linear-gradient(92deg, #fff 10%, #ff7891 48%, #40d7d0 92%); color: transparent; background-clip: text; }
.hero-copy { max-width: 720px; margin: 28px 0 0; color: var(--muted); font-size: clamp(1.05rem, 2vw, 1.25rem); }
.actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border-radius: 999px; font-weight: 750; }
.button-primary { background: linear-gradient(135deg, var(--hot), var(--hot-2)); box-shadow: 0 12px 36px rgba(255, 65, 100, 0.25); }
.button-secondary { border: 1px solid var(--line); color: var(--muted); }

.trust-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; overflow: hidden; border: 1px solid var(--line); border-radius: 22px; background: var(--line); }
.trust-item { background: rgba(16, 21, 34, 0.96); padding: 26px; }
.trust-item strong { display: block; margin-bottom: 6px; }
.trust-item span { color: var(--muted); font-size: 0.92rem; }

.section { padding: 92px 0; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 38px; }
h2 { margin: 0; font-size: clamp(2rem, 4.5vw, 3.6rem); line-height: 1.1; letter-spacing: -0.04em; }
.section-heading p { margin: 0; max-width: 480px; color: var(--muted); }
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.feature-card { min-height: 250px; padding: 30px; border: 1px solid var(--line); border-radius: 24px; background: linear-gradient(150deg, rgba(21, 28, 44, 0.94), rgba(11, 15, 25, 0.94)); }
.feature-index { display: inline-flex; color: var(--hot); font-weight: 800; font-size: 0.85rem; }
.feature-card h3 { margin: 54px 0 10px; font-size: 1.45rem; }
.feature-card p { margin: 0; color: var(--muted); }

.process { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; counter-reset: item; }
.step { padding: 26px 0; border-top: 1px solid var(--line); }
.step::before { counter-increment: item; content: "0" counter(item); display: block; color: var(--cyan); font-weight: 800; margin-bottom: 28px; }
.step h3 { margin: 0 0 8px; }
.step p { color: var(--muted); margin: 0; }

.security-panel { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 44px; padding: 48px; border-radius: 28px; background: linear-gradient(135deg, #141a2a, #0c111c); border: 1px solid var(--line); }
.security-panel p { color: var(--muted); }
.principles { display: grid; gap: 12px; align-content: start; }
.principle { padding: 17px 18px; background: rgba(255,255,255,.035); border: 1px solid var(--line); border-radius: 16px; }

.legal-main { padding: 72px 0 100px; }
.legal-main h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); }
.legal-meta { margin: 16px 0 42px; color: var(--muted); }
.legal-content { max-width: 820px; }
.legal-content h2 { margin: 42px 0 14px; font-size: 1.45rem; letter-spacing: -0.015em; }
.legal-content p, .legal-content li { color: #c5cede; }
.legal-content ul { padding-left: 1.2rem; }

.site-footer { padding: 34px 0; border-top: 1px solid var(--line); color: var(--muted); }
.footer-row { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.footer-links { display: flex; gap: 22px; }
.filing { margin-top: 10px; font-size: 0.875rem; }
.filing a { color: inherit; text-decoration: none; }
.filing a:hover { color: var(--text); text-decoration: underline; }

@media (max-width: 760px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .nav { height: 64px; }
  .menu-button { display: block; }
  .nav-links { display: none; position: absolute; left: 14px; right: 14px; top: 70px; padding: 18px; flex-direction: column; align-items: flex-start; background: #111726; border: 1px solid var(--line); border-radius: 18px; }
  .nav-links.open { display: flex; }
  .hero { padding: 76px 0 64px; }
  .trust-strip, .feature-grid, .process, .security-panel { grid-template-columns: 1fr; }
  .section { padding: 68px 0; }
  .section-heading { display: block; }
  .section-heading p { margin-top: 16px; }
  .feature-card { min-height: 220px; }
  .security-panel { padding: 28px; }
  .footer-row { align-items: flex-start; flex-direction: column; }
  .footer-links { flex-wrap: wrap; }
}