:root {
  --ink: #1f2328;
  --muted: #5f6b7a;
  --line: #d8dee6;
  --paper: #ffffff;
  --wash: #f4f7fb;
  --blue: #1a73e8;
  --blue-d: #1558b0;
  --red: #d93025;
  --green: #188038;
  --gold: #f9ab00;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: auto; }
body.s1 {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  font-size: 16px;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 20;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 68px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 700; font-size: 18px; text-decoration: none; }
.brand:hover { text-decoration: none; }
.nav { display: flex; gap: 8px; }
.nav a {
  display: inline-block;
  padding: 8px 14px;
  color: var(--muted);
  border-radius: 999px;
  text-decoration: none;
}
.nav a.active, .nav a:hover { background: #e8f0fe; color: var(--blue); text-decoration: none; }
.menu-btn { display: none; border: 1px solid var(--line); background: #fff; border-radius: 8px; padding: 8px; cursor: pointer; }
.hero { padding: 56px 0 36px; }
.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 40px; align-items: center; }
.kicker { color: var(--blue); font-size: 13px; letter-spacing: 0.08em; font-weight: 700; text-transform: uppercase; }
h1 { font-size: 36px; line-height: 1.28; margin: 10px 0 16px; }
h2 { font-size: 26px; line-height: 1.35; margin-bottom: 14px; }
h3 { font-size: 18px; margin: 16px 0 8px; }
.lead { color: var(--muted); font-size: 17px; margin-bottom: 22px; }
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 18px; border-radius: 10px; font-weight: 600;
  text-decoration: none; border: 1px solid transparent;
}
.btn:hover { text-decoration: none; filter: brightness(0.96); }
.btn-win { background: var(--blue); color: #fff; }
.btn-win:hover { background: var(--blue-d); color: #fff; }
.btn-mac { background: #202124; color: #fff; }
.btn-ios { background: #fff; color: var(--ink); border-color: var(--line); }
.btn-and { background: var(--green); color: #fff; }
.block { padding: 42px 0; border-top: 1px solid var(--line); }
.block.wash { background: var(--wash); border-top: 0; }
.block p, .card p, .faq-item p { margin-bottom: 12px; color: #3c4654; }
.cards-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.cards-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 18px 18px 8px;
}
.card h3 { margin-top: 10px; }
.ico { width: 36px; height: 36px; }
.platforms { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.plat {
  border: 1px solid var(--line); border-radius: 12px; padding: 16px; background: #fff;
}
.plat strong { display: block; margin: 8px 0 6px; }
.quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.quote { background: #fff; border-left: 4px solid var(--gold); padding: 16px 16px 8px; border-radius: 0 12px 12px 0; box-shadow: 0 1px 0 var(--line); }
.quote cite { display: block; color: var(--muted); font-style: normal; font-size: 13px; margin: 8px 0 10px; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.stat { text-align: center; background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 18px 10px; }
.stat b { display: block; font-size: 28px; color: var(--blue); }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; background: #fff; }
th, td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
th { background: #e8f0fe; }
.faq-item { border: 1px solid var(--line); border-radius: 12px; padding: 16px 16px 6px; background: #fff; margin-bottom: 12px; }
.faq-item h3 { margin-top: 0; }
.cta-band { background: linear-gradient(90deg, #1a73e8, #188038); color: #fff; padding: 36px 0; }
.cta-band h2, .cta-band p { color: #fff; }
.cta-band .btn-ios { color: var(--ink); }
.site-footer { background: #202124; color: #c4c7cc; padding: 28px 0 36px; font-size: 14px; }
.site-footer a { color: #8ab4f8; }
.site-footer p { margin-bottom: 10px; color: #c4c7cc; }
.safe { color: #81c995; font-weight: 600; }
@media (max-width: 900px) {
  .hero-grid, .cards-4, .cards-3, .cards-2, .platforms, .quotes, .stats { grid-template-columns: 1fr; }
  h1 { font-size: 28px; }
  .menu-btn { display: inline-flex; }
  .nav { display: none; position: absolute; right: 16px; top: 68px; background: #fff; border: 1px solid var(--line); border-radius: 12px; flex-direction: column; padding: 8px; min-width: 180px; }
  .nav.open { display: flex; }
}