:root {
  --blue: #0f6cbd;
  --blue-dark: #074b83;
  --blue-soft: #e7f3ff;
  --ink: #172033;
  --muted: #5d6878;
  --line: #dce4ee;
  --panel: rgba(255, 255, 255, .94);
  --shadow: 0 18px 48px rgba(39, 75, 112, .12);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  background: #f5f8fc;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.container { width: min(1160px, calc(100% - 40px)); margin: auto; }
.site-header {
  position: sticky; top: 0; z-index: 20;
  border-bottom: 1px solid rgba(220, 228, 238, .9);
  background: rgba(255, 255, 255, .9);
  backdrop-filter: blur(18px);
}
.nav { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 750; }
.brand img { width: 42px; height: 42px; border-radius: 10px; }
.nav-links { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.nav-links a { padding: 8px 12px; border-radius: 8px; color: #3e4a5c; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--blue); background: var(--blue-soft); }
.hero {
  overflow: hidden;
  padding: 84px 0 64px;
  background:
    radial-gradient(circle at 80% 10%, rgba(81, 168, 255, .2), transparent 32%),
    linear-gradient(135deg, #fafdff, #eaf4ff);
}
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.eyebrow { display: inline-flex; gap: 8px; padding: 6px 11px; color: var(--blue-dark); background: #fff; border: 1px solid #cbdff3; border-radius: 999px; font-size: 14px; font-weight: 650; }
h1 { max-width: 760px; margin: 20px 0 18px; font-size: clamp(38px, 5vw, 66px); line-height: 1.12; letter-spacing: -.04em; }
h2 { margin: 0 0 14px; font-size: clamp(28px, 3vw, 40px); line-height: 1.25; letter-spacing: -.025em; }
h3 { margin: 0 0 8px; font-size: 20px; line-height: 1.35; }
.lead { max-width: 700px; color: var(--muted); font-size: 18px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.btn { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; padding: 10px 20px; border: 1px solid var(--blue); border-radius: 8px; font-weight: 700; }
.btn.primary { color: #fff; background: var(--blue); box-shadow: 0 9px 22px rgba(15, 108, 189, .22); }
.btn.secondary { color: var(--blue); background: #fff; }
.window {
  overflow: hidden; background: #fff; border: 1px solid #c9d9e8; border-radius: 14px; box-shadow: var(--shadow);
  transform: perspective(1000px) rotateY(-3deg);
}
.window-bar { height: 42px; display: flex; align-items: center; gap: 7px; padding: 0 15px; background: #edf3f8; border-bottom: 1px solid #d7e1ea; }
.window-dot { width: 10px; height: 10px; border-radius: 50%; background: #9fb0c0; }
.window img { width: 100%; aspect-ratio: 44 / 35; object-fit: cover; }
.stats { margin-top: 34px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.stat strong { display: block; font-size: 23px; color: var(--blue-dark); }
.stat span { color: var(--muted); font-size: 14px; }
.section { padding: 78px 0; }
.section.alt { background: #fff; }
.section-head { max-width: 760px; margin-bottom: 32px; }
.section-head p { color: var(--muted); margin: 0; }
.grid { display: grid; gap: 20px; }
.grid.two { grid-template-columns: repeat(2, 1fr); }
.grid.three { grid-template-columns: repeat(3, 1fr); }
.grid.four { grid-template-columns: repeat(4, 1fr); }
.card {
  padding: 25px; background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  box-shadow: 0 8px 26px rgba(45, 75, 105, .05);
}
.card p, .card li { color: var(--muted); }
.card p:last-child { margin-bottom: 0; }
.icon {
  width: 42px; height: 42px; display: grid; place-items: center; margin-bottom: 16px;
  color: #fff; background: var(--blue); border-radius: 10px; font-weight: 800;
}
.topic { border-top: 3px solid var(--blue); }
.topic a { color: var(--blue); font-weight: 700; }
.checklist { padding: 0; margin: 18px 0 0; list-style: none; }
.checklist li { position: relative; padding: 7px 0 7px 27px; }
.checklist li::before { content: "✓"; position: absolute; left: 0; color: var(--blue); font-weight: 800; }
.split { display: grid; grid-template-columns: .88fr 1.12fr; gap: 44px; align-items: center; }
.logo-showcase { padding: 50px; display: grid; place-items: center; background: linear-gradient(145deg, #eaf5ff, #fff); border: 1px solid var(--line); border-radius: 16px; }
.logo-showcase img { width: 300px; height: 300px; border-radius: 22%; box-shadow: var(--shadow); }
.page-hero { padding: 62px 0 48px; text-align: center; background: linear-gradient(180deg, #edf6ff, #f5f8fc); border-bottom: 1px solid var(--line); }
.page-hero h1 { margin-inline: auto; font-size: clamp(34px, 4.5vw, 54px); }
.page-hero .lead { margin-inline: auto; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
table { width: 100%; border-collapse: collapse; min-width: 700px; }
th, td { padding: 16px 18px; text-align: left; border-bottom: 1px solid var(--line); }
th { color: var(--blue-dark); background: #edf6ff; }
tr:last-child td { border-bottom: 0; }
.notice { padding: 18px 20px; margin: 24px 0; color: #30465c; background: #eaf4ff; border-left: 4px solid var(--blue); border-radius: 0 8px 8px 0; }
.steps { counter-reset: step; display: grid; gap: 16px; }
.step { position: relative; padding: 24px 24px 24px 74px; background: #fff; border: 1px solid var(--line); border-radius: 12px; }
.step::before { counter-increment: step; content: counter(step); position: absolute; left: 22px; top: 22px; width: 34px; height: 34px; display: grid; place-items: center; color: #fff; background: var(--blue); border-radius: 8px; font-weight: 800; }
details { padding: 18px 20px; background: #fff; border: 1px solid var(--line); border-radius: 10px; }
details + details { margin-top: 12px; }
summary { cursor: pointer; font-weight: 700; }
details p { color: var(--muted); margin-bottom: 0; }
.cta { padding: 40px; display: flex; align-items: center; justify-content: space-between; gap: 24px; color: #fff; background: linear-gradient(110deg, #075999, #0f6cbd); border-radius: 16px; }
.cta h2 { margin-bottom: 7px; }
.cta p { margin: 0; color: #dcefff; }
.cta .btn { color: var(--blue-dark); background: #fff; border-color: #fff; white-space: nowrap; }
.site-footer { padding: 52px 0 24px; color: #cbd7e4; background: #182637; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 30px; }
.site-footer h3 { color: #fff; font-size: 16px; }
.site-footer a { display: block; width: max-content; max-width: 100%; margin: 7px 0; color: #cbd7e4; }
.site-footer a:hover { color: #fff; }
.copyright { margin-top: 34px; padding-top: 20px; border-top: 1px solid #344457; color: #9fafc0; font-size: 14px; }
.small { color: var(--muted); font-size: 14px; }
@media (max-width: 900px) {
  .hero-grid, .split { grid-template-columns: 1fr; }
  .grid.four { grid-template-columns: repeat(2, 1fr); }
  .grid.three { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .window { transform: none; }
}
@media (max-width: 640px) {
  .container { width: min(100% - 28px, 1160px); }
  .nav { align-items: flex-start; padding: 13px 0; }
  .brand span { display: none; }
  .nav-links { justify-content: flex-end; gap: 2px; }
  .nav-links a { padding: 7px; font-size: 13px; }
  .hero { padding: 56px 0 44px; }
  .section { padding: 56px 0; }
  .grid.two, .grid.three, .grid.four, .footer-grid { grid-template-columns: 1fr; }
  .stats { gap: 8px; }
  .stat strong { font-size: 18px; }
  .cta { align-items: flex-start; flex-direction: column; padding: 28px; }
}