:root {
  --primary: #2f6bff;
  --primary-dark: #1a47c8;
  --accent: #18c8ff;
  --bg: #071327;
  --bg-soft: #0d1e38;
  --text: #e8f0ff;
  --muted: #9fb2d4;
  --card: rgba(11, 29, 55, 0.72);
  --border: rgba(124, 164, 255, 0.25);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top, #0b1f3f 0%, var(--bg) 55%, #050d1d 100%);
  line-height: 1.7;
  overflow-x: hidden;
}
.container { width: min(1180px, 92%); margin: 0 auto; }

.bg-orb {
  position: fixed;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
  z-index: -1;
}
.orb-1 { top: -200px; right: -120px; background: rgba(24, 200, 255, 0.2); animation: floatOrb 10s ease-in-out infinite; }
.orb-2 { bottom: -220px; left: -120px; background: rgba(47, 107, 255, 0.24); animation: floatOrb 12s ease-in-out infinite reverse; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(4, 14, 30, 0.68);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}
.nav-wrap { display: flex; justify-content: space-between; align-items: center; min-height: 68px; gap: 16px; }
.logo { font-size: 1.2rem; font-weight: 800; color: #fff; letter-spacing: 1px; }
nav { display: flex; gap: 16px; flex-wrap: wrap; }
nav a { text-decoration: none; color: #b7c9ea; font-weight: 600; transition: color .2s ease; }
nav a:hover { color: #fff; }

.hero {
  position: relative;
  padding: 90px 0 64px;
  border-bottom: 1px solid var(--border);
}
.grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(146, 187, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(146, 187, 255, 0.08) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: radial-gradient(circle at 40% 20%, black, transparent 72%);
  pointer-events: none;
}
.hero-layout { display: grid; grid-template-columns: 1.05fr .95fr; gap: 24px; align-items: center; }
.eyebrow { color: #86d8ff; font-weight: 700; margin: 0 0 8px; }
.hero h1 { margin: 0; font-size: clamp(2rem, 3.2vw, 3rem); line-height: 1.2; color: #fff; }
.subtitle { margin-top: 12px; color: #c8d7f4; font-weight: 700; }
.hero-actions { margin-top: 22px; display: flex; gap: 12px; flex-wrap: wrap; }
.hero-visual {
  perspective: 1200px;
}
.hero-visual img {
  width: 100%;
  border-radius: 18px;
  border: 1px solid var(--border);
  box-shadow: 0 18px 40px rgba(4, 13, 30, .55);
  transition: transform .25s ease;
}

.btn {
  display: inline-block;
  padding: 11px 18px;
  border-radius: 12px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 700;
  cursor: pointer;
}
.btn-primary { background: linear-gradient(90deg, var(--primary), var(--accent)); color: #fff; box-shadow: 0 8px 22px rgba(24, 200, 255, 0.25); }
.btn-primary:hover { filter: brightness(1.06); }
.btn-secondary { background: rgba(255,255,255,0.04); border-color: #5073b8; color: #dbe8ff; }
.btn-secondary:hover { background: rgba(255,255,255,0.08); }

.section { padding: 58px 0; }
.section-alt { background: linear-gradient(180deg, rgba(11, 24, 47, 0.66), rgba(8, 20, 40, 0.66)); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
h2 { margin: 0 0 22px; font-size: 1.9rem; color: #fff; }

.metrics-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 12px; }
.metric-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  backdrop-filter: blur(8px);
}
.metric-card h3 { margin: 0; color: #fff; font-size: 1.7rem; }
.metric-card p { margin: 6px 0 0; color: var(--muted); }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: center; }
.image-card img { width: 100%; border-radius: 14px; border: 1px solid var(--border); box-shadow: 0 12px 28px rgba(0,0,0,.28); }

.grid { display: grid; gap: 16px; }
.grid-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0,1fr)); }

.card, .case-card, .contact-card, .form {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
  backdrop-filter: blur(8px);
}
.card:hover, .case-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 32px rgba(6, 14, 30, .45);
  border-color: rgba(150, 199, 255, 0.45);
}
.card img, .case-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid var(--border);
  margin-bottom: 10px;
}
.tag { color: #57d6ff; font-weight: 700; }

.list-check { margin: 0; padding-left: 0; list-style: none; display: grid; gap: 8px; }
.list-check li::before { content: "✓"; color: #64e2ff; font-weight: 800; margin-right: 8px; }

p { color: var(--muted); }
strong { color: #e8f1ff; }

.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 16px; }
.form { display: grid; gap: 12px; }
label { display: grid; gap: 6px; font-weight: 600; color: #d4e3ff; }
input, select, textarea {
  border: 1px solid #33538f;
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
  color: #eef4ff;
  background: rgba(5, 17, 35, 0.9);
}
input:focus, select:focus, textarea:focus { outline: 2px solid #3e76ff; border-color: #4b8fff; }

.site-footer { text-align: center; color: #8fa4c7; padding: 28px 0 40px; border-top: 1px solid var(--border); }

.reveal { opacity: 0; transform: translateY(18px); }
.reveal.in { opacity: 1; transform: translateY(0); transition: opacity .7s ease, transform .7s ease; }

@keyframes floatOrb {
  0%, 100% { transform: translateY(0px) translateX(0px); }
  50% { transform: translateY(20px) translateX(10px); }
}

@media (max-width: 980px) {
  .hero-layout,
  .two-col,
  .metrics-grid,
  .grid-4,
  .grid-3,
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 580px) {
  .nav-wrap { flex-direction: column; align-items: flex-start; padding: 10px 0; }
  nav { gap: 12px; }
}