:root {
  --bg: #0b1220;
  --panel: #111827;
  --muted: #9ca3af;
  --text: #e5e7eb;
  --brand: #22c55e;
  --brand-600: #16a34a;
  --accent: #60a5fa;
  --card: #111827;
  --border: #1f2937;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 600px at 70% -50%, rgba(96,165,250,.15), transparent 60%), var(--bg);
  line-height: 1.6;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(8px);
  background: rgba(11,18,32,0.6);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
}
.logo { filter: drop-shadow(0 2px 8px rgba(34,197,94,.35)); }
.brand-text { white-space: nowrap; }

.nav-links {
  display: flex;
  gap: 18px;
}
.nav-links a {
  color: var(--text);
  text-decoration: none;
  opacity: .85;
}
.nav-links a:hover { opacity: 1; color: white; }

.nav-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 8px;
}

/* Hero */
.hero {
  position: relative;
  padding: 80px 0 60px;
  overflow: hidden;
}
.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}
.hero h1 {
  margin: 0;
  font-size: 40px;
  line-height: 1.2;
}
.subtitle { color: var(--muted); max-width: 760px; margin: 14px auto 0; }

.cta { margin-top: 22px; display: flex; gap: 12px; justify-content: center; }
.btn {
  display: inline-block;
  padding: 10px 16px;
  border-radius: 10px;
  text-decoration: none;
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--panel);
}
.btn.primary { background: linear-gradient(90deg, var(--brand), var(--brand-600)); border-color: transparent; color: #07110b; font-weight: 700; }
.btn:hover { filter: brightness(1.08); }

.meta { color: var(--muted); margin-top: 16px; }
.meta a { color: var(--accent); }

.hero-bg::before,
.hero-bg::after {
  content: "";
  position: absolute;
  inset: -20% -10% auto auto;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(closest-side, rgba(34,197,94,.18), transparent 70%);
  filter: blur(30px);
  transform: translate(20%, -20%);
}
.hero-bg::after {
  inset: auto auto -20% -10%;
  background: radial-gradient(closest-side, rgba(96,165,250,.15), transparent 70%);
  transform: translate(-10%, 10%);
}

/* Sections */
.section { padding: 60px 0; }
.section.alt { background: rgba(17,24,39,.55); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section h2 { font-size: 28px; margin: 0 0 10px; }
.section-desc { color: var(--muted); margin: 0 0 22px; }

.cards {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
}
.card h3 { margin: 0 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); }

.grid.two {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.feature {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
}
.feature h3 { margin: 0 0 8px; font-size: 18px; }
.feature p { margin: 0; color: var(--muted); }

.news { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.news-item { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 16px; }
.news-item h3 { margin: 0 0 6px; font-size: 18px; }
.news-item p { margin: 0 0 10px; color: var(--muted); }
.news-item a { color: var(--accent); text-decoration: none; }

.list { margin: 10px 0 0; padding: 0 0 0 18px; }
.list li { margin: 6px 0; }

.email { font-size: 18px; }

.contact-form { display: grid; gap: 10px; }
.contact-form label { display: grid; gap: 6px; }
.contact-form input,
.contact-form textarea {
  width: 100%;
  background: #0d1526;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  padding: 10px 12px;
}
.form-tip { color: var(--muted); margin: 8px 0 0; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 18px 0; background: rgba(11,18,32,.7); }
.footer-inner { display: flex; gap: 16px; align-items: center; justify-content: space-between; }
.footer-inner a { color: var(--muted); text-decoration: none; }
.footer-inner a:hover { color: #fff; }

/* Responsive */
@media (max-width: 1024px) {
  .cards { grid-template-columns: repeat(3, 1fr); }
  .news { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .nav-links { display: none; position: absolute; right: 20px; top: 64px; background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 12px; flex-direction: column; gap: 10px; }
  .nav-toggle { display: inline-block; }
  .hero { padding: 56px 0 40px; }
  .hero h1 { font-size: 30px; }
  .cards { grid-template-columns: 1fr; }
  .grid.two { grid-template-columns: 1fr; }
  .news { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; gap: 6px; }
}