:root {
  --bg: #0B1021;
  --surface: #111634;
  --text: #EEF0FF;
  --muted: #A9B0D4;
  --primary: #4F46E5;
  --primary-2: #7C3AED;
  --accent: #22D3EE;
  --success: #10B981;
  --warn: #F59E0B;
  --danger: #EF4444;
  --border: #1F2450;
  --radius: 12px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "PingFang SC", "Microsoft YaHei", "Noto Sans", "Source Han Sans SC", sans-serif;
  color: var(--text);
  background: radial-gradient(1000px 500px at 10% -10%, #1C2152 0%, transparent 60%), radial-gradient(800px 400px at 90% -10%, #20275F 0%, transparent 60%), var(--bg);
  line-height: 1.6;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(1.2) blur(10px);
  background: linear-gradient(0deg, rgba(11,16,33,0.8), rgba(11,16,33,0.8));
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
}
.logo-img {
  height: 32px;
  width: 32px;
  display: block;
}
.logo-text { letter-spacing: 0.8px; }

.nav-toggle {
  display: none;
  appearance: none;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 8px 12px;
  border-radius: 8px;
}
.nav-list {
  display: flex;
  gap: 18px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.nav-list a {
  color: var(--muted);
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 8px;
}
.nav-list a:hover,
.nav-list a.active {
  color: var(--text);
  background: rgba(255,255,255,0.06);
}

.hero {
  padding: 60px 0 40px;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: center;
}
.hero-content h1 {
  margin: 0 0 10px;
  font-size: 38px;
  letter-spacing: 0.4px;
}
.hero-content .sub {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 16px;
}
.hero-actions { display: flex; gap: 12px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 42px;
  padding: 0 18px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  border: 1px solid transparent;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
}
.btn-secondary {
  background: rgba(255,255,255,0.06);
  color: var(--text);
  border-color: var(--border);
}
.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn:hover { filter: brightness(1.05); }

.trust { margin-top: 20px; color: var(--muted); }
.hero-visual { display: flex; justify-content: center; }
.visual-card {
  width: 100%;
  max-width: 420px;
  background: linear-gradient(180deg, #13183F, #0F1433);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 16px;
}
.visual-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}
.visual-item {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
}
.visual-item .visual-title { font-weight: 700; }
.visual-item .visual-desc { color: var(--muted); font-size: 14px; }
.visual-item.highlight {
  background: linear-gradient(135deg, rgba(79,70,229,.3), rgba(124,58,237,.3));
  border-color: rgba(124,58,237,.4);
}

.section {
  padding: 64px 0;
}
.section.alt {
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.00));
}
.section-title {
  margin: 0 0 10px;
  font-size: 28px;
}
.section-sub {
  margin: 0 0 24px;
  color: var(--muted);
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}
.card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}
.card-icon { font-size: 24px; }
.card-actions { margin-top: 14px; }
.card.case { min-height: 140px; }

.bullet {
  padding-left: 18px;
  color: var(--muted);
}
.bullet li { margin-bottom: 6px; }

.solutions-grid, .feature-grid, .pricing-grid, .contact-grid {
  display: grid;
  gap: 20px;
}
.solutions-grid { grid-template-columns: repeat(3, 1fr); }
.feature-grid { grid-template-columns: repeat(3, 1fr); }
.pricing-grid { grid-template-columns: repeat(3, 1fr); }
.contact-grid { grid-template-columns: 1fr 1fr; align-items: start; }
.solution, .feature, .price-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}
.price-card.featured {
  border-color: rgba(124,58,237,.5);
  box-shadow: 0 20px 50px rgba(124,58,237,.25);
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
}
.stat .num {
  font-size: 24px;
  font-weight: 700;
}
.stat .label { color: var(--muted); }

.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}
.form-full { display: block; }
label span {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
}
input, textarea {
  width: 100%;
  background: #0E1331;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  padding: 10px 12px;
  outline: none;
}
input:focus, textarea:focus { border-color: #3640A8; }
.form-tip { color: var(--muted); font-size: 13px; margin-top: 8px; }

.site-footer {
  padding: 28px 0;
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.00));
}
.footer-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-links a {
  color: var(--muted);
  text-decoration: none;
  margin-right: 14px;
}
.footer-links a:hover { color: var(--text); }
.footer-copy { color: var(--muted); }

@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr 1fr; }
  .solutions-grid, .feature-grid, .pricing-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; text-align: center; }
}
@media (max-width: 640px) {
  .nav-toggle { display: inline-flex; }
  .nav-list {
    position: absolute;
    right: 20px;
    top: 64px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 10px;
    display: none;
    flex-direction: column;
    min-width: 180px;
  }
  .nav-list.open { display: flex; }
  .cards { grid-template-columns: 1fr; }
  .solutions-grid, .feature-grid, .pricing-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .hero { padding: 40px 0 20px; }
  .hero-content h1 { font-size: 28px; }
}