/* 第1套根域名：浅色宽 Hero + 主下载置顶 + 功能三栏 */
html { scroll-behavior: auto; }
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  color: #132033;
  background: #f5f8fc;
  font: 16.5px/1.8 "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
}
img, svg { max-width: 100%; display: inline-block; vertical-align: middle; }
a { color: #1554c4; text-underline-offset: 0.16em; }
a:hover { color: #0d3d94; }
:focus-visible { outline: 2px solid #1554c4; outline-offset: 3px; }

.skip {
  position: absolute; left: -999px; top: 0;
}
.skip:focus { left: 12px; top: 12px; z-index: 80; background: #fff; padding: 8px 12px; }

.topbar {
  background: #fff;
  border-bottom: 1px solid #d7e2f0;
}
.topbar-inner, .wrap, .hero-inner, .foot-inner {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}
.topbar-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #0f2744;
  text-decoration: none;
  font-weight: 750;
  font-size: 20px;
}
.brand svg { width: 32px; height: 32px; color: #1554c4; }
.nav { display: flex; gap: 8px; flex-wrap: wrap; }
.nav a {
  text-decoration: none;
  color: #334155;
  padding: 8px 14px;
  border-radius: 8px;
  font-weight: 600;
}
.nav a:hover { background: #eaf1fb; }
.nav a[aria-current="page"] { background: #1554c4; color: #fff; }

.hero {
  background:
    linear-gradient(180deg, #ffffff 0%, #eef4fb 100%);
  border-bottom: 1px solid #d7e2f0;
  padding: 42px 0 48px;
}
.hero-inner { display: grid; gap: 18px; }
.kicker {
  margin: 0;
  color: #1554c4;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
}
.hero h1 {
  margin: 0;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.28;
  color: #0f2744;
}
.hero p { margin: 0; max-width: 820px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 6px; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 10px;
  background: #1554c4;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
}
.btn svg { width: 20px; height: 20px; }
.btn:hover { background: #1146a3; color: #fff; }
.btn-ghost {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 10px;
  border: 1px solid #b7c8de;
  background: #fff;
  color: #0f2744;
  text-decoration: none;
  font-weight: 700;
}
.btn-ghost:hover { border-color: #1554c4; color: #1554c4; }
.note { font-size: 14px; color: #5b6b7e; }

.section { padding: 42px 0; }
.section h2 {
  margin: 0 0 14px;
  font-size: 26px;
  line-height: 1.35;
  color: #0f2744;
}
.section p { margin: 0 0 12px; }
.feat-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 18px;
}
.feat-card {
  background: #fff;
  border: 1px solid #d7e2f0;
  border-radius: 14px;
  padding: 18px 18px 8px;
}
.feat-card h3 {
  margin: 10px 0 8px;
  font-size: 18px;
}
.feat-card svg { width: 28px; height: 28px; color: #1554c4; }

.plat-row, .review-row, .cmp-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 16px 0;
}
.plat, .review, .cmp, .deep, .proof {
  background: #fff;
  border: 1px solid #d7e2f0;
  border-radius: 14px;
  padding: 16px 18px 8px;
}
.plat h3, .review h3, .cmp h3, .deep h3 { margin: 0 0 8px; font-size: 17px; }
table.data {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  margin: 14px 0;
}
table.data th, table.data td {
  border: 1px solid #d7e2f0;
  padding: 10px 12px;
  text-align: left;
}
table.data th { background: #eef4fb; }
.faq details {
  background: #fff;
  border: 1px solid #d7e2f0;
  border-radius: 10px;
  padding: 4px 16px;
  margin: 0 0 10px;
}
.faq summary { cursor: pointer; font-weight: 700; padding: 10px 0; }
.faq p { margin: 0 0 12px; }
.callout {
  margin-top: 16px;
  padding: 14px 16px;
  background: #eaf1fb;
  border-left: 4px solid #1554c4;
}

.site-foot {
  background: #0f2744;
  color: #d5deea;
  padding: 28px 0;
  font-size: 14px;
}
.site-foot p { margin: 0 0 8px; }

@media (max-width: 900px) {
  .feat-3, .plat-row, .review-row, .cmp-row { grid-template-columns: 1fr; }
  .topbar-inner { flex-wrap: wrap; padding: 10px 0; }
}
@media (max-width: 640px) {
  .hero { padding: 28px 0 32px; }
  .btn, .btn-ghost { width: 100%; justify-content: center; }
}