/* Set 2: dark teal sidebar shell, horizontal feature rows */
:root {
  --side: #0e2a32;
  --side-2: #163a44;
  --ink: #1c2b30;
  --paper: #f3f7f8;
  --card: #ffffff;
  --accent: #128f76;
  --accent-2: #0b6a58;
  --line: #c9d7db;
  --warn: #b45309;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font: 16px/1.7 "Trebuchet MS", "Microsoft YaHei", sans-serif;
}
.app {
  display: grid;
  grid-template-columns: 232px 1fr;
  min-height: 100vh;
}
.side {
  background: var(--side);
  color: #d7ece8;
  padding: 22px 16px;
  position: sticky;
  top: 0;
  height: 100vh;
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 18px;
  margin-bottom: 22px;
}
.nav { display: flex; flex-direction: column; gap: 6px; }
.nav a {
  color: #c9e6e0;
  text-decoration: none;
  padding: 10px 12px;
  border-left: 3px solid transparent;
}
.nav a.current {
  background: var(--side-2);
  border-left-color: var(--accent);
  color: #fff;
}
.main { min-width: 0; }
.topbar {
  background: #fff;
  border-bottom: 1px solid var(--line);
  padding: 12px 28px;
  color: #4d646b;
}
.hero {
  background: #12404c;
  color: #e8f7f4;
  padding: 34px 28px 38px;
}
h1 { font-size: 30px; margin: 0 0 12px; font-weight: 700; }
h2 { font-size: 22px; margin: 0 0 12px; color: #0b4a40; }
h3 { font-size: 17px; margin: 0 0 8px; }
.lead { margin: 0 0 18px; max-width: 70ch; }
.btn-row { display: flex; flex-wrap: wrap; gap: 8px; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  padding: 11px 18px;
  border-radius: 999px;
  font-weight: 700;
}
.btn-win { background: var(--accent); color: #fff; }
.btn-mac { background: #0f766e; color: #fff; }
.btn-ios, .btn-and { background: transparent; color: #d7ece8; border: 1px solid #7ecfc0; }
.block { padding: 32px 28px; }
.block.tint { background: #e5f3f0; }
.row {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 16px;
  background: var(--card);
  border: 1px solid var(--line);
  padding: 16px;
  margin-bottom: 12px;
}
.iconbox {
  width: 72px;
  height: 72px;
  background: #12404c;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
}
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
table { width: 100%; border-collapse: collapse; background: #fff; }
th, td { border: 1px solid var(--line); padding: 9px 11px; text-align: left; }
th { background: #0e2a32; color: #fff; }
.quote {
  background: #fff;
  border-top: 3px solid var(--accent);
  padding: 14px;
}
.faq-item { background: #fff; border: 1px solid var(--line); padding: 12px 14px; margin-bottom: 10px; }
.faq-item strong { display: block; margin-bottom: 6px; }
.site-footer {
  background: var(--side);
  color: #c9d7db;
  padding: 22px 28px 26px;
}
.foot-nav { display: flex; gap: 14px; margin: 8px 0 12px; }
.foot-nav a { color: #c9d7db; text-decoration: none; }
.fine { font-size: 13px; line-height: 1.7; }
@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }
  .side { position: relative; height: auto; }
  .nav { flex-direction: row; flex-wrap: wrap; }
  .grid2 { grid-template-columns: 1fr; }
}