:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --ink: #152033;
  --muted: #5b6b7c;
  --line: #d7e0ea;
  --brand: #2563eb;
  --brand-2: #0ea5e9;
  --ok: #0f766e;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(900px 420px at 10% -10%, rgba(37,99,235,.16), transparent 60%),
    radial-gradient(700px 360px at 100% 0%, rgba(14,165,233,.14), transparent 55%),
    var(--bg);
  line-height: 1.65;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { width: min(1080px, 92%); margin: 0 auto; }
.site-header {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(10px);
  background: rgba(255,255,255,.86);
  border-bottom: 1px solid var(--line);
}
.header-inner { display:flex; align-items:center; justify-content:space-between; gap:16px; padding:14px 0; }
.brand { display:flex; align-items:center; gap:10px; color:inherit; font-weight:700; }
.brand small { display:block; font-size:11px; color:var(--muted); font-weight:600; letter-spacing:.04em; }
.nav { display:flex; gap:14px; flex-wrap:wrap; }
.nav a { color: var(--muted); font-weight:600; }
.nav a[aria-current="page"] { color: var(--brand); }
.hero { display:grid; grid-template-columns: 1.2fr .8fr; gap:28px; padding:48px 0 28px; align-items:center; }
@media (max-width: 860px) { .hero { grid-template-columns: 1fr; padding-top:28px; } }
.eyebrow {
  display:inline-block; padding:4px 10px; border-radius:999px;
  background: rgba(37,99,235,.1); color: var(--brand); font-size:12px; font-weight:700;
}
h1 { font-size: clamp(28px, 4vw, 42px); line-height:1.2; margin:12px 0 14px; }
.lead { color: var(--muted); font-size:18px; margin:0 0 22px; }
.cta-row { display:flex; gap:12px; flex-wrap:wrap; }
.btn {
  display:inline-flex; align-items:center; justify-content:center;
  padding:12px 18px; border-radius:12px; font-weight:700; border:1px solid transparent;
}
.btn-primary { background: linear-gradient(135deg, var(--brand), var(--brand-2)); color:#fff; }
.btn-primary:hover { text-decoration:none; filter:brightness(1.05); }
.btn-ghost { background:#fff; border-color:var(--line); color:var(--ink); }
.btn-ghost:hover { text-decoration:none; border-color:#b9c8d8; }
.panel {
  background: var(--panel); border:1px solid var(--line); border-radius:20px;
  padding:22px; box-shadow: 0 18px 40px rgba(21,32,51,.06);
}
.grid { display:grid; grid-template-columns: repeat(3, 1fr); gap:16px; }
@media (max-width: 860px) { .grid { grid-template-columns: 1fr; } }
.tile { background:#fff; border:1px solid var(--line); border-radius:16px; padding:18px; }
.tile h2 { margin:0 0 8px; font-size:18px; }
.tile p { margin:0; color:var(--muted); }
.section { padding:18px 0 42px; }
.steps {
  margin-top:18px; background:#fff; border:1px solid var(--line);
  border-radius:16px; padding:18px 20px;
}
.steps ol { margin:10px 0 0; padding-left:20px; color:var(--muted); }
.site-footer {
  border-top:1px solid var(--line); background:#fff; padding:22px 0 34px; color:var(--muted); font-size:14px;
}
.site-footer .foot { display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap; }
.prose { background:#fff; border:1px solid var(--line); border-radius:16px; padding:24px; }
.prose h1 { margin-top:0; font-size:30px; }
.prose h2 { font-size:20px; margin-top:28px; }
.prose p, .prose li { color:var(--muted); }