:root {
  --sky: #0ea5e9;
  --sky-dark: #0284c7;
  --mint: #10b981;
  --ink: #0f172a;
  --muted: #475569;
  --line: #e2e8f0;
  --bg: #f8fafc;
  --card: #ffffff;
  --radius: 18px;
  --max: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(900px 420px at 10% -10%, rgba(14, 165, 233, 0.14), transparent 60%),
    radial-gradient(700px 360px at 100% 0%, rgba(16, 185, 129, 0.12), transparent 55%),
    var(--bg);
  line-height: 1.65;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.wrap { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: rgba(248, 250, 252, 0.86);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 700;
  background: linear-gradient(135deg, var(--sky), var(--mint));
}
.brand > span:last-child { display: flex; flex-direction: column; line-height: 1.25; }
.brand-name { font-weight: 700; font-size: 16px; }
.brand-sub { font-size: 12px; color: var(--muted); }

.nav { display: flex; gap: 6px; flex-wrap: wrap; }
.nav a {
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
}
.nav a:hover,
.nav a.is-active {
  color: var(--sky-dark);
  background: rgba(14, 165, 233, 0.1);
}
.menu-btn {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 14px;
}

.hero { padding: 72px 0 40px; text-align: center; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line);
  color: var(--sky-dark);
  font-size: 13px;
  font-weight: 600;
}
h1 {
  margin: 18px 0 12px;
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.2;
}
.grad {
  background: linear-gradient(90deg, var(--sky), var(--mint));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lead { max-width: 720px; margin: 0 auto; color: var(--muted); font-size: 18px; }
.actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 12px;
  font-weight: 600;
  border: 1px solid transparent;
}
.btn-primary { background: var(--ink); color: #fff; }
.btn-ghost { background: #fff; border-color: var(--line); }

.stats, .grid { display: grid; gap: 16px; }
.stats { grid-template-columns: repeat(4, 1fr); margin: 40px 0 8px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.stat { text-align: center; }
.stat strong { display: block; font-size: 28px; color: var(--sky-dark); }
.stat span { color: var(--muted); font-size: 13px; }
.section { padding: 28px 0 56px; }
.section h2 { margin: 0 0 8px; font-size: 28px; }
.section-lead { color: var(--muted); margin: 0 0 24px; }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.tag {
  font-size: 12px;
  padding: 4px 8px;
  border-radius: 999px;
  background: #f1f5f9;
  color: #334155;
}
.meta { font-size: 13px; color: var(--sky-dark); font-weight: 600; margin-bottom: 8px; }
.list { margin: 12px 0 0; padding-left: 18px; color: var(--muted); }
.contact-row { display: flex; flex-direction: column; gap: 6px; }
.contact-row a { color: var(--sky-dark); font-weight: 600; }

.site-footer {
  background: #0f172a;
  color: #cbd5e1;
  padding: 40px 0 24px;
  margin-top: 24px;
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 24px; }
.site-footer h4 { color: #fff; margin: 0 0 12px; font-size: 14px; }
.site-footer a { color: #94a3b8; }
.site-footer a:hover { color: #e2e8f0; }
.legal {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid #1e293b;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  justify-content: center;
  font-size: 12px;
  color: #64748b;
}
.legal a { color: #94a3b8; }

@media (max-width: 860px) {
  .menu-btn { display: inline-flex; }
  .nav {
    display: none;
    position: absolute;
    left: 16px;
    right: 16px;
    top: 68px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 8px;
    flex-direction: column;
  }
  .nav.is-open { display: flex; }
  .stats, .grid-3, .grid-2, .footer-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 40px; }
}