/* 第1套：场景驱动 · 顶栏双栏 · 藏青描金 */
:root {
  --ink: #14233a;
  --navy: #1a365d;
  --gold: #c9a227;
  --gold-d: #9a7a14;
  --paper: #f4f1ea;
  --card: #ffffff;
  --line: #d7d0c4;
  --mute: #5c6573;
  --ok: #2f6b4f;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
}

.wrap { min-height: 100vh; }

.topbar {
  background: var(--navy);
  color: #f7f3ea;
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 3px solid var(--gold);
}
.topbar-in {
  max-width: 1120px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.brand svg { display: block; }
.nav { display: flex; gap: 6px; flex-wrap: wrap; }
.nav a {
  color: #e8e0d2;
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 2px;
  font-size: 14px;
}
.nav a.is-now {
  background: var(--gold);
  color: #1a1a1a;
  font-weight: 700;
}

.hero {
  background: linear-gradient(120deg, #12233f 0%, #1f4a7a 58%, #163152 100%);
  color: #f8f4ec;
  padding: 48px 20px 56px;
}
.hero-grid {
  max-width: 1120px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 36px;
  align-items: start;
}
.hero h1 {
  margin: 0 0 16px;
  font-size: 30px;
  line-height: 1.35;
  font-weight: 700;
}
.hero p { margin: 0 0 14px; color: #e6dfd2; }
.hero .feat-list {
  margin: 16px 0 22px;
  padding: 0;
  list-style: none;
}
.hero .feat-list li {
  padding: 6px 0 6px 22px;
  position: relative;
}
.hero .feat-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 10px;
  height: 10px;
  background: var(--gold);
  transform: rotate(45deg);
}
.dl-box { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 10px; }
a.btn-win, a.btn-mac, a.btn-ios, a.btn-and, a.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  border-radius: 3px;
}
a.btn-win { background: var(--gold); color: #1a1a1a; }
a.btn-mac { background: #2b6cb0; color: #fff; }
a.btn-ios { background: #111827; color: #fff; }
a.btn-and { background: #276749; color: #fff; }
a.btn-ghost { background: transparent; color: #f3ead8; border: 1px solid #c9b896; }
.plat-hint { font-size: 13px; color: #cfc6b4; margin: 0 0 8px; }
.hero-aside {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(201,162,39,0.35);
  padding: 20px 18px;
}
.hero-aside h3 { margin: 0 0 10px; font-size: 16px; color: var(--gold); }
.hero-aside p { font-size: 14px; }

.layout {
  max-width: 1120px;
  margin: 0 auto;
  padding: 36px 20px 20px;
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 28px;
}
.main .block {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 5px solid var(--gold);
  padding: 22px 24px 18px;
  margin: 0 0 22px;
}
.main .block h2 {
  margin: 0 0 12px;
  font-size: 20px;
  color: var(--navy);
}
.main .block p { margin: 0 0 12px; }
.main .block ul, .main .block ol { margin: 0 0 12px; padding-left: 20px; }
.note {
  background: #eef4ec;
  border: 1px solid #c5d6c4;
  padding: 12px 14px;
  margin: 12px 0;
  color: #245038;
}
.table-wrap { overflow-x: auto; margin: 12px 0; }
table.sheet {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
table.sheet th, table.sheet td {
  border: 1px solid var(--line);
  padding: 8px 10px;
  text-align: left;
}
table.sheet th { background: #e8eef6; color: var(--navy); }

.rail { position: sticky; top: 76px; }
.rail .card {
  background: #fff;
  border: 1px solid var(--line);
  padding: 16px;
  margin-bottom: 16px;
}
.rail h3 { margin: 0 0 8px; font-size: 15px; color: var(--navy); }
.rail a { color: var(--navy); }

.cta-mid, .end-cta {
  background: var(--navy);
  color: #f6f0e4;
  padding: 28px 24px;
  margin: 8px 0 22px;
}
.cta-mid h2, .end-cta h2 { color: #fff; margin-top: 0; }
.cta-mid a.btn-win, .end-cta a.btn-win { margin-top: 8px; }

.faq-item { border-bottom: 1px solid var(--line); padding: 12px 0; }
.faq-item h3 { margin: 0 0 8px; font-size: 16px; color: var(--navy); }
.faq-item p { margin: 0 0 8px; }

.foot {
  background: #0f1c2e;
  color: #d5d0c6;
  padding: 28px 20px 36px;
  font-size: 13px;
  line-height: 1.7;
}
.foot-in { max-width: 1120px; margin: 0 auto; }
.ok-line { color: #b7e0c6; margin: 0 0 10px; }
.foot nav { margin: 10px 0; }
.foot a { color: #e6c86a; }
.menu-btn { display: none; }

@media (max-width: 900px) {
  .hero-grid, .layout { grid-template-columns: 1fr; }
  .rail { position: static; }
  .menu-btn {
    display: inline-flex;
    background: transparent;
    border: 1px solid #c9a227;
    color: #f3ead8;
    padding: 6px 10px;
  }
  .nav { display: none; width: 100%; }
  .nav.open { display: flex; flex-direction: column; }
  .topbar-in { flex-wrap: wrap; }
}