/* Set 1 — root: light corporate, centered canvas, blue cards */
:root {
  --ink: #1f2933;
  --muted: #52606d;
  --line: #d9e2ec;
  --paper: #ffffff;
  --canvas: #f4f7fb;
  --brand: #1a73e8;
  --brand-dark: #1558b0;
  --ok: #0f9d58;
}
* { box-sizing: border-box; }
html { scroll-behavior: auto; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--canvas);
  font: 16px/1.75 "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
img, svg { max-width: 100%; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.site-header {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
}
.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 700;
  font-size: 18px;
}
.brand:hover { text-decoration: none; }
.nav { display: flex; gap: 8px; }
.nav a {
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 600;
}
.nav a:hover { background: #e8f0fe; text-decoration: none; color: var(--brand); }
.nav a.is-current { background: #e8f0fe; color: var(--brand); }
.hero {
  padding: 72px 0 48px;
  background: linear-gradient(180deg, #e8f0fe 0%, var(--canvas) 100%);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 36px;
  align-items: center;
}
.hero h1 { font-size: 40px; line-height: 1.25; margin: 0 0 16px; }
.lead { color: var(--muted); font-size: 18px; margin: 0 0 24px; }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }
button {
  appearance: none;
  border: 0;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 8px;
  background: var(--brand);
  color: #fff;
}
.btn:hover { background: var(--brand-dark); }
.btn-ghost {
  background: #fff;
  color: var(--brand);
  border: 1px solid #c5d8f7;
}
.btn-ghost:hover { background: #e8f0fe; }
.btn:disabled { opacity: 0.75; cursor: wait; }
.hero-panel {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 12px 32px rgba(26, 115, 232, 0.08);
}
.hero-panel h2 { margin: 0 0 8px; font-size: 20px; }
.section { padding: 56px 0; }
.section h2 { font-size: 28px; margin: 0 0 16px; }
.section p { margin: 0 0 16px; color: #334e68; }
.cards-3, .cards-4, .cards-2 {
  display: grid;
  gap: 18px;
}
.cards-3 { grid-template-columns: repeat(3, 1fr); }
.cards-4 { grid-template-columns: repeat(4, 1fr); }
.cards-2 { grid-template-columns: repeat(2, 1fr); }
.card, .quote, .faq-item, .step, .stat {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px;
}
.card h3, .step h3, .faq-item h3 { margin: 0 0 10px; font-size: 18px; }
.icon-box {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: #e8f0fe;
  display: grid;
  place-items: center;
  margin-bottom: 12px;
}
.stat strong { display: block; font-size: 32px; color: var(--brand); }
.compare { width: 100%; border-collapse: collapse; background: #fff; }
.compare th, .compare td {
  border: 1px solid var(--line);
  padding: 12px 14px;
  text-align: left;
}
.compare th { background: #e8f0fe; }
.cta-band {
  background: #1a73e8;
  color: #fff;
  padding: 40px 0;
}
.cta-band h2, .cta-band p { color: #fff; }
.site-footer {
  background: #102a43;
  color: #d9e2ec;
  padding: 36px 0 24px;
}
.site-footer a { color: #9fb3c8; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 20px; }
.tiny { font-size: 13px; color: #9fb3c8; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (max-width: 900px) {
  .hero-grid, .cards-3, .cards-4, .cards-2, .foot-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 30px; }
  .header-row { flex-direction: column; padding: 12px 0; }
}