/* 第1套 根域名：官方蓝白横向导航 + 居中卡片 */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: auto; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: #1f2d3d; background: #ffffff; line-height: 1.8; font-size: 16px;
}
a { color: #1d4ed8; text-decoration: none; }
a:hover { text-decoration: underline; }
button { font-family: inherit; }
img, svg { vertical-align: middle; }
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 22px; }
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: #fff; border-bottom: 1px solid #dbe4f3;
}
.header-row { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; color: #12305a; }
.brand:hover { text-decoration: none; }
.logo-mark {
  width: 34px; height: 34px; border-radius: 8px; background: #1d4ed8;
  display: inline-flex; align-items: center; justify-content: center;
}
.nav { display: flex; gap: 4px; }
.nav a {
  padding: 8px 16px; border-radius: 8px; color: #3d4f66; font-weight: 600; font-size: 15px;
}
.nav a:hover { background: #eef4ff; color: #1d4ed8; text-decoration: none; }
.nav a.active { background: #1d4ed8; color: #fff; }
.hero {
  background: linear-gradient(120deg, #1e3a8a 0%, #1d4ed8 50%, #3b82f6 100%);
  color: #fff; padding: 72px 0 80px;
}
.hero h1 { font-size: 38px; line-height: 1.32; max-width: 18em; font-weight: 800; }
.hero .lead { margin-top: 16px; font-size: 18px; color: #dbeafe; max-width: 46em; }
.hero-actions { margin-top: 28px; display: flex; gap: 12px; flex-wrap: wrap; }
.btn, .dl-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: 10px; border: 0; cursor: pointer;
  font-size: 16px; font-weight: 700; text-decoration: none;
}
.btn:hover, .dl-btn:hover { text-decoration: none; }
.dl-btn { background: #fff; color: #1d4ed8; }
.dl-btn:hover { background: #eff6ff; }
.btn-ghost { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.75); }
.btn-ghost:hover { background: rgba(255,255,255,.12); }
.btn-solid { background: #1d4ed8; color: #fff; }
.btn-solid:hover { background: #1e40af; }
.sec { padding: 64px 0; }
.sec.tint { background: #f4f7fd; }
.sec h2 { font-size: 28px; font-weight: 800; color: #12305a; margin-bottom: 12px; }
.sec .intro { color: #51657e; margin-bottom: 28px; max-width: 52em; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.card {
  background: #fff; border: 1px solid #e2e8f4; border-radius: 14px; padding: 22px;
}
.card h3 { font-size: 18px; margin: 10px 0 8px; color: #12305a; }
.card p { color: #51657e; font-size: 15px; }
.ico {
  width: 44px; height: 44px; border-radius: 12px; background: #e8effc;
  display: inline-flex; align-items: center; justify-content: center;
}
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: start; margin-bottom: 36px; }
.split p { color: #51657e; margin-bottom: 10px; }
.split ul { padding-left: 20px; color: #51657e; }
.split li { margin-bottom: 6px; }
.panel {
  min-height: 180px; border-radius: 16px; background: linear-gradient(135deg, #dbeafe, #bfdbfe);
  display: flex; align-items: center; justify-content: center;
}
.stats {
  background: #12305a; color: #fff; border-radius: 16px; padding: 36px 20px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; text-align: center;
}
.stats b { display: block; font-size: 30px; color: #93c5fd; }
.stats span { color: #c7d7ef; font-size: 14px; }
.quote { background: #fff; border: 1px solid #e2e8f4; border-radius: 14px; padding: 22px; }
.quote p { color: #3d4f66; }
.who { margin-top: 14px; font-size: 14px; color: #12305a; font-weight: 700; }
.who em { display: block; font-style: normal; color: #7a8ba3; font-weight: 400; }
table.cmp { width: 100%; border-collapse: collapse; background: #fff; }
.cmp th, .cmp td { padding: 13px 14px; border-bottom: 1px solid #e8eef7; text-align: left; font-size: 15px; }
.cmp thead th { background: #1d4ed8; color: #fff; }
.faq-item { background: #fff; border: 1px solid #e2e8f4; border-radius: 12px; padding: 18px 20px; margin-bottom: 12px; }
.faq-item h3 { font-size: 17px; color: #12305a; margin-bottom: 8px; }
.faq-item p { color: #51657e; }
.cta {
  background: linear-gradient(120deg, #1e3a8a, #2563eb); color: #fff;
  border-radius: 16px; padding: 42px 28px; text-align: center;
}
.cta h2 { color: #fff; }
.cta p { color: #dbeafe; margin: 10px auto 22px; max-width: 40em; }
.article { max-width: 780px; margin: 0 auto; }
.article h2 { margin: 40px 0 12px; }
.article h3 { font-size: 19px; color: #1e3a5f; margin: 22px 0 8px; }
.article p { color: #3d4f66; margin-bottom: 14px; }
.article ul, .article ol { padding-left: 22px; color: #3d4f66; margin-bottom: 14px; }
.article li { margin-bottom: 6px; }
.page-hero { background: #f4f7fd; padding: 56px 0 40px; }
.page-hero h1 { font-size: 34px; color: #12305a; max-width: 18em; }
.steps { counter-reset: s; }
.step { position: relative; padding: 18px 18px 18px 70px; background: #fff; border: 1px solid #e2e8f4; border-radius: 12px; margin-bottom: 12px; }
.step::before {
  counter-increment: s; content: counter(s);
  position: absolute; left: 18px; top: 18px; width: 34px; height: 34px; border-radius: 50%;
  background: #1d4ed8; color: #fff; font-weight: 800; display: flex; align-items: center; justify-content: center;
}
.site-footer { background: #12305a; color: #b7c7dc; padding: 40px 0 28px; margin-top: 20px; }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 24px; margin-bottom: 22px; }
.site-footer h4 { color: #fff; margin-bottom: 10px; }
.site-footer a { color: #b7c7dc; display: block; margin-bottom: 7px; font-size: 14px; }
.foot-note { border-top: 1px solid #2a4570; padding-top: 16px; font-size: 13px; }
.foot-note p { margin-bottom: 6px; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (max-width: 900px) {
  .grid3, .grid4, .stats, .foot-grid, .split { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 28px; }
}
@media (max-width: 560px) {
  .grid3, .grid4, .stats, .foot-grid, .split { grid-template-columns: 1fr; }
  .header-row { height: auto; padding: 10px 0; flex-direction: column; align-items: flex-start; gap: 8px; }
}