:root {
  --bg: #0A0F1E;
  --surface: #111827;
  --surface2: #1a2235;
  --accent: #00C2FF;
  --accent2: #00FF9C;
  --text: #F0F4FF;
  --muted: #8899BB;
  --border: rgba(0,194,255,0.15);
  --border2: rgba(255,255,255,0.08);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text); font-family: 'Inter', sans-serif; font-size: 16px; line-height: 1.6; }
nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10,15,30,0.92); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.nav-logo { font-family: 'Space Grotesk', sans-serif; font-size: 20px; font-weight: 700; color: var(--text); text-decoration: none; letter-spacing: -0.02em; }
.nav-logo span { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 1.75rem; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: 14px; font-weight: 500; transition: color 0.2s; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-phone { font-family: 'JetBrains Mono', monospace; font-size: 13px; color: var(--accent); text-decoration: none; border: 1px solid var(--border); padding: 6px 14px; border-radius: 6px; transition: all 0.2s; }
.nav-phone:hover { background: rgba(0,194,255,0.1); }
.nav-cta { background: var(--accent); color: #0A0F1E; font-size: 13px; font-weight: 600; padding: 8px 18px; border-radius: 6px; text-decoration: none; transition: opacity 0.2s; }
.nav-cta:hover { opacity: 0.9; }
.nav-zh { color: var(--muted); font-size: 13px; text-decoration: none; }
section { padding: 5rem 2rem; }
.container { max-width: 1100px; margin: 0 auto; }
.section-eyebrow { font-family: 'JetBrains Mono', monospace; font-size: 11px; color: var(--accent); letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: 1rem; }
.section-title { font-family: 'Space Grotesk', sans-serif; font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 1rem; }
.section-sub { color: var(--muted); max-width: 580px; line-height: 1.75; margin-bottom: 3rem; }
.btn-primary { background: var(--accent); color: #0A0F1E; font-weight: 700; font-size: 15px; padding: 14px 28px; border-radius: 8px; text-decoration: none; transition: opacity 0.2s; display: inline-flex; align-items: center; gap: 8px; }
.btn-primary:hover { opacity: 0.9; }
.btn-secondary { border: 1px solid var(--border2); color: var(--text); font-size: 15px; padding: 14px 28px; border-radius: 8px; text-decoration: none; transition: border-color 0.2s, background 0.2s; display: inline-flex; align-items: center; gap: 8px; }
.btn-secondary:hover { border-color: var(--accent); background: rgba(0,194,255,0.05); }
.tag { font-family: 'JetBrains Mono', monospace; font-size: 10px; padding: 3px 10px; border-radius: 4px; border: 1px solid var(--border); color: var(--accent); background: rgba(0,194,255,0.06); letter-spacing: 0.05em; }
.partner-badge { padding: 8px 18px; border: 1px solid var(--border2); border-radius: 8px; background: rgba(255,255,255,0.03); display: flex; align-items: center; justify-content: center; transition: border-color 0.2s, background 0.2s; }
.partner-badge:hover { border-color: var(--border); background: rgba(255,255,255,0.06); }
footer { background: var(--surface); border-top: 1px solid var(--border2); padding: 3rem 2rem; }
.footer-inner { max-width: 1100px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem; }
.footer-brand p { color: var(--muted); font-size: 14px; line-height: 1.7; margin-top: 0.75rem; max-width: 280px; }
.footer-col h4 { font-family: 'Space Grotesk', sans-serif; font-size: 13px; font-weight: 600; margin-bottom: 1rem; color: var(--text); }
.footer-col a { display: block; color: var(--muted); text-decoration: none; font-size: 13px; margin-bottom: 0.6rem; transition: color 0.2s; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom { max-width: 1100px; margin: 2rem auto 0; padding-top: 1.5rem; border-top: 1px solid var(--border2); display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; }
.footer-bottom p { color: var(--muted); font-size: 12px; }
.footer-certs { display: flex; gap: 8px; align-items: center; }
.footer-cert { font-family: 'JetBrains Mono', monospace; font-size: 10px; padding: 3px 8px; border: 1px solid var(--border); border-radius: 4px; color: var(--muted); }
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }
@media (max-width: 768px) { .nav-links { display: none; } .footer-inner { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-inner { grid-template-columns: 1fr; } nav { padding: 0 1rem; } section { padding: 3.5rem 1rem; } }