:root {
  --ink: #182230;
  --muted: #617083;
  --line: #dce4ee;
  --brand: #1668e3;
  --brand-dark: #0e4fae;
  --brand-soft: #edf5ff;
  --surface: #ffffff;
  --page: #f4f7fb;
  --success: #087b5b;
  --shadow: 0 18px 48px rgba(25, 51, 83, 0.10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--page);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.7;
}

a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-dark); }

.shell { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(220, 228, 238, 0.85);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
}
.nav-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 750; }
.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: #fff;
  font-weight: 800;
  background: linear-gradient(135deg, #1975f2, #36a1ff);
  box-shadow: 0 8px 22px rgba(22, 104, 227, 0.26);
}
.nav-links { display: flex; gap: 20px; font-size: 14px; }

.hero {
  padding: 92px 0 72px;
  background:
    radial-gradient(circle at 18% 14%, rgba(54, 161, 255, 0.16), transparent 32%),
    radial-gradient(circle at 88% 30%, rgba(22, 104, 227, 0.12), transparent 28%);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  color: var(--brand-dark);
  background: var(--brand-soft);
  border: 1px solid #d4e7ff;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 650;
}
.hero h1 {
  max-width: 820px;
  margin: 24px 0 18px;
  font-size: clamp(38px, 6vw, 64px);
  line-height: 1.14;
  letter-spacing: -0.035em;
}
.hero p { max-width: 760px; margin: 0; color: var(--muted); font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 12px;
  font-weight: 650;
}
.button-primary { color: #fff; background: var(--brand); }
.button-primary:hover { color: #fff; background: var(--brand-dark); }
.button-secondary { color: var(--ink); border: 1px solid var(--line); background: #fff; }

.section { padding: 68px 0; }
.section h2 { margin: 0 0 12px; font-size: 30px; }
.section-lead { margin: 0 0 30px; color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: var(--shadow);
}
.card h3 { margin: 14px 0 8px; font-size: 19px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  color: var(--brand-dark);
  background: var(--brand-soft);
  font-weight: 800;
}
.notice {
  padding: 24px;
  color: #225444;
  border: 1px solid #bce5d5;
  border-radius: 16px;
  background: #edfbf6;
}

.document { padding: 58px 0 80px; }
.document article {
  padding: clamp(26px, 5vw, 54px);
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
  box-shadow: var(--shadow);
}
.document h1 { margin-top: 0; font-size: 34px; line-height: 1.3; }
.document h2 { margin-top: 34px; font-size: 21px; }
.document h3 { margin-top: 24px; font-size: 17px; }
.document p, .document li { color: #405166; }
.document .meta { color: var(--muted); font-size: 14px; }
.document ul { padding-left: 22px; }

.callback {
  min-height: calc(100vh - 146px);
  display: grid;
  place-items: center;
  padding: 48px 0;
}
.callback-card { max-width: 620px; text-align: center; }
.status-dot {
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  margin: 0 auto 18px;
  color: var(--success);
  border-radius: 50%;
  background: #ddf8ee;
  font-size: 28px;
}

.footer { padding: 28px 0 34px; color: var(--muted); border-top: 1px solid var(--line); }
.footer-inner { display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
.footer-links { display: flex; gap: 16px; flex-wrap: wrap; }

@media (max-width: 820px) {
  .grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .hero { padding-top: 68px; }
}