:root {
  --bg: #0f1419;
  --ink: #e6edf3;
  --muted: #8b98a9;
  --accent: #4ea1ff;
  --accent2: #6ee7b7;
  --card: #161c24;
  --line: #232c38;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.7 -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

.topbar {
  position: sticky; top: 0; z-index: 10;
  background: rgba(15,20,25,0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.bar-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.logo { color: var(--ink); text-decoration: none; font-weight: 700; font-size: 18px; letter-spacing: 1px; }
.logo-mark { color: var(--accent); }
.nav a { color: var(--muted); text-decoration: none; margin-left: 24px; font-size: 14px; transition: color .2s; }
.nav a:hover { color: var(--ink); }

.hero { padding: 96px 0 80px; text-align: center; }
.hero h1 { font-size: 40px; font-weight: 700; margin: 0 0 16px; letter-spacing: 1px; }
.hero .lead { max-width: 680px; margin: 0 auto 28px; color: var(--muted); font-size: 17px; }
.cta {
  display: inline-block; padding: 12px 28px; border-radius: 6px;
  background: var(--accent); color: #fff; text-decoration: none; font-size: 15px;
  transition: background .2s;
}
.cta:hover { background: #2b8def; }

.block { padding: 64px 0; border-bottom: 1px solid var(--line); }
.block:last-of-type { border-bottom: none; }
.block-title { font-size: 26px; font-weight: 700; margin: 0 0 24px; }
.block p { color: #c9d3df; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 36px; }
.stats div { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 20px; text-align: center; }
.stats strong { display: block; font-size: 26px; color: var(--accent2); }
.stats span { color: var(--muted); font-size: 13px; }

.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 24px; }
.card h3 { margin: 0 0 10px; font-size: 18px; color: var(--accent); }
.card p { margin: 0; font-size: 14px; }

.cases { padding-left: 20px; }
.cases li { margin-bottom: 12px; color: #c9d3df; }

.contact p { margin: 6px 0; }
.contact a { color: var(--accent); text-decoration: none; }
.contact a:hover { text-decoration: underline; }
.muted { color: var(--muted); font-size: 13px; }

.foot { border-top: 1px solid var(--line); padding: 28px 0; font-size: 13px; color: var(--muted); }
.foot .wrap { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

@media (max-width: 720px) {
  .stats, .cards { grid-template-columns: 1fr; }
  .hero h1 { font-size: 30px; }
  .nav a { margin-left: 14px; }
}