/* 第1套：场景驱动 / 双栏办公台 */
:root {
  --ink: #16324f;
  --navy: #0b4f8c;
  --navy-deep: #083a68;
  --wash: #e8f1fa;
  --paper: #ffffff;
  --line: #c5d6e8;
  --muted: #5b7086;
  --accent: #c45c12;
  --ok: #1b6b4a;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body.site-root {
  margin: 0;
  color: var(--ink);
  background: var(--wash);
  font: 16px/1.75 "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.top {
  background: var(--navy-deep);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 4px solid var(--accent);
}
.top-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: 0.02em;
}
.brand svg { display: block; }
nav { display: flex; gap: 8px; flex-wrap: wrap; }
nav a {
  color: #d7e6f5;
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 4px;
}
nav a:hover { background: rgba(255,255,255,0.08); color: #fff; }
nav a.is-on { background: #fff; color: var(--navy-deep); font-weight: 700; }

.hero {
  max-width: 1180px;
  margin: 24px auto 0;
  padding: 0 20px;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr);
  gap: 22px;
}
.hero-copy {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 28px 32px 32px;
  box-shadow: 0 8px 24px rgba(11, 79, 140, 0.06);
}
.hero-copy h1 {
  margin: 0 0 14px;
  font-size: 30px;
  line-height: 1.35;
  color: var(--navy-deep);
}
.hero-copy .lead { margin: 0 0 14px; }
.hero-copy .points { margin: 0 0 18px; padding-left: 20px; }
.hero-dl {
  background: var(--navy);
  color: #fff;
  padding: 24px 22px;
  border-radius: 2px 16px 2px 16px;
}
.hero-dl h2 { display: none; }
.hero-dl p { margin: 0 0 12px; color: #d9e8f6; font-size: 14px; }
.cta-list { display: grid; gap: 10px; }
.btn {
  display: block;
  text-align: center;
  text-decoration: none;
  padding: 11px 14px;
  border-radius: 4px;
  font-weight: 700;
}
.btn-win { background: #fff; color: var(--navy-deep); }
.btn-mac { background: #124e7a; color: #fff; border: 1px solid #7eb3dd; }
.btn-ios, .btn-and { background: transparent; color: #fff; border: 1px dashed #8ec0e6; }
.btn-sub { display: inline-block; margin-right: 12px; margin-top: 8px; color: var(--navy); font-weight: 700; }
.plat { display: block; font-size: 12px; font-weight: 400; opacity: 0.85; }

.wrap {
  max-width: 1180px;
  margin: 28px auto 40px;
  padding: 0 20px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 22px;
  align-items: start;
}
main .block {
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 6px solid var(--navy);
  padding: 22px 26px 26px;
  margin-bottom: 18px;
}
main .block h2 {
  margin: 0 0 12px;
  font-size: 22px;
  color: var(--navy-deep);
}
main .block p { margin: 0 0 12px; }
main .block ul, main .block ol { margin: 0 12px 12px 0; }
.scene-tag {
  display: inline-block;
  background: var(--wash);
  color: var(--navy);
  font-size: 12px;
  padding: 2px 8px;
  margin-bottom: 8px;
  letter-spacing: 0.06em;
}
.tip {
  background: #fff7ed;
  border: 1px solid #f0d2b0;
  padding: 12px 14px;
  margin: 12px 0 0;
  color: #6a3b12;
}
table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  margin: 10px 0 14px;
}
table.data th, table.data td {
  border: 1px solid var(--line);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}
table.data th { background: var(--wash); }
.mid-cta, .end-cta {
  background: #12385c;
  color: #fff;
  padding: 20px 24px;
  margin-bottom: 18px;
}
.mid-cta h2, .end-cta h2 { color: #fff; }
.mid-cta a, .end-cta a { color: #fff; font-weight: 700; }
.faq dt { font-weight: 700; margin-top: 14px; }
.faq dd { margin: 6px 0 0; }

.rail {
  position: sticky;
  top: 76px;
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 16px;
}
.rail p { margin: 0 0 10px; font-size: 14px; color: var(--muted); }
.rail a { display: block; color: var(--navy); text-decoration: none; padding: 6px 0; border-bottom: 1px dashed var(--line); }

.foot {
  background: #0d2236;
  color: #c9d6e2;
  padding: 28px 20px 36px;
  font-size: 13px;
  line-height: 1.7;
}
.foot-inner { max-width: 1180px; margin: 0 auto; }
.foot strong { color: #fff; }

@media (max-width: 900px) {
  .hero, .wrap { grid-template-columns: 1fr; }
  .rail { position: static; }
  .hero-copy h1 { font-size: 24px; }
}