/* Site 10 desktop: wide enterprise slate + gold, 4-col mega */
:root { --slate: #334155; --gold: #b8860b; --bg: #eef2f6; --ink: #1e293b; }
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}
.mega {
  background: var(--slate); color: #f8fafc;
  padding: 20px 4vw 16px;
}
.mega-row { display: flex; justify-content: space-between; align-items: center; }
.brand-name { font-size: 24px; font-weight: 800; }
.nav { display: flex; gap: 20px; }
.nav a { color: #e2e8f0; text-decoration: none; font-weight: 600; }
.nav a.is-on { color: var(--gold); border-bottom: 2px solid var(--gold); }
.hero { padding: 40px 4vw 28px; background: linear-gradient(90deg, #1e293b, #334155 55%, #3f4f63); color: #fff; }
.hero h1 { font-size: 34px; max-width: 900px; }
.hero .lead { max-width: 800px; margin: 14px 0 20px; color: #cbd5e1; }
.dl-row { display: flex; flex-wrap: wrap; gap: 10px; }
.btn-win, .btn-mac, .btn-ios, .btn-and {
  background: var(--gold); color: #1e293b; font-weight: 800; text-decoration: none; padding: 12px 18px;
}
.btn-mac, .btn-ios, .btn-and { background: transparent; color: #fff; border: 1px solid #94a3b8; }
.quad { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; padding: 28px 4vw; }
.quad article { background: #fff; padding: 18px; border-top: 4px solid var(--gold); min-height: 160px; }
.sec { padding: 12px 4vw 24px; }
.sec h2 { font-size: 24px; margin: 16px 0; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; background: #fff; }
th { background: var(--slate); color: #fff; padding: 10px; text-align: left; }
td { border: 1px solid #cbd5e1; padding: 9px 10px; }
.quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.quotes blockquote { background: #fff; padding: 16px; }
.news-list { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.news-list li { background: #fff; padding: 14px 16px; }
.news-list time { color: var(--gold); font-size: 12px; }
.faq dt { font-weight: 700; margin-top: 14px; }
.steps { list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.steps li { background: #fff; padding: 14px; }
.steps .n { display: inline-block; background: var(--gold); color: #1e293b; font-weight: 800; padding: 2px 8px; margin-bottom: 8px; }
.foot { background: #1e293b; color: #cbd5e1; padding: 22px 4vw; font-size: 13px; }
@media (max-width: 1000px) {
  .quad, .quotes, .steps, .news-list { grid-template-columns: 1fr; }
  .mega-row { flex-direction: column; align-items: flex-start; gap: 10px; }
}