/* 顶栏横向导航，双栏正文，海军蓝 */
:root {
  --ink: #12233d;
  --navy: #123a73;
  --navy-deep: #0c2752;
  --gold: #b8860b;
  --paper: #f4f7fb;
  --card: #ffffff;
  --line: #d5deeb;
  --muted: #5b6b82;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.85;
  font-size: 16px;
}
img, svg { vertical-align: middle; }
a { color: var(--navy); text-decoration: none; }
a:hover { color: var(--gold); }
.skip { position: absolute; left: -999px; }
.site-header {
  background: var(--navy-deep);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 3px solid var(--gold);
}
.header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.04em;
}
.brand svg { width: 28px; height: 28px; }
.nav-main { display: flex; gap: 6px; }
.nav-main a {
  color: #d7e4f7;
  padding: 8px 14px;
  border-radius: 4px;
  font-size: 15px;
}
.nav-main a.active,
.nav-main a:hover {
  background: #174a8c;
  color: #fff;
}
.hero {
  background: linear-gradient(120deg, #0c2752 0%, #1a4e96 58%, #245fa8 100%);
  color: #fff;
  padding: 56px 22px 64px;
}
.hero-grid {
  max-width: 1120px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.35fr 0.85fr;
  gap: 36px;
  align-items: start;
}
.hero h1 {
  font-size: 32px;
  line-height: 1.35;
  margin: 8px 0 16px;
  font-weight: 700;
}
.hero .lead { font-size: 17px; color: #e4edf8; margin-bottom: 14px; }
.hero .points { margin: 12px 0 20px 18px; color: #dce7f6; }
.hero .points li { margin: 6px 0; }
.hero-panel {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.22);
  border-radius: 10px;
  padding: 22px;
}
.hero-panel h2 {
  font-size: 18px;
  margin-bottom: 12px;
  color: #ffe08a;
}
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
}
.btn svg { width: 16px; height: 16px; }
.btn-win { background: #f3c14b; color: #1b1403; }
.btn-win:hover { background: #ffd36a; color: #1b1403; }
.btn-mac { background: #fff; color: #123a73; }
.btn-ios, .btn-and { background: transparent; color: #fff; border: 1px solid #c5d6ee; }
.btn-sub { background: transparent; color: #fff; border: 1px dashed #9eb6d6; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 22px; }
.section {
  background: var(--card);
  margin: 28px auto;
  padding: 32px 34px;
  border-radius: 8px;
  border-left: 6px solid var(--navy);
  box-shadow: 0 1px 0 rgba(18,58,115,0.06);
}
.section h2 {
  font-size: 24px;
  color: var(--navy);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}
.section p { margin: 12px 0; color: #24344d; }
.section ul, .section ol { margin: 10px 0 10px 22px; }
.section li { margin: 6px 0; }
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}
.scene-card {
  background: #f7fafc;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px 18px;
}
.scene-card h3 {
  font-size: 17px;
  color: var(--navy-deep);
  margin-bottom: 8px;
}
table.data {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0;
  font-size: 15px;
}
table.data th, table.data td {
  border: 1px solid var(--line);
  padding: 8px 10px;
  text-align: left;
}
table.data th { background: #e8eef7; color: var(--navy-deep); }
.note {
  background: #fff8e6;
  border: 1px solid #ecd38a;
  padding: 12px 14px;
  border-radius: 6px;
  margin: 14px 0;
  color: #5a4308;
}
.mid-cta, .end-cta {
  background: #eaf1fb;
  border: 1px solid #c5d6ee;
  padding: 20px;
  border-radius: 8px;
  margin: 18px 0 6px;
}
.faq-item { margin: 16px 0; }
.faq-item h3 { font-size: 17px; color: var(--navy-deep); margin-bottom: 6px; }
.site-footer {
  background: #0c2752;
  color: #c9d6ea;
  padding: 28px 22px 36px;
  margin-top: 20px;
  font-size: 14px;
  line-height: 1.7;
}
.site-footer .wrap { max-width: 1120px; }
.site-footer strong { color: #ffe08a; display: block; margin-bottom: 8px; }
@media (max-width: 860px) {
  .hero-grid, .two-col { grid-template-columns: 1fr; }
  .header-inner { flex-direction: column; padding: 12px; gap: 8px; }
}