:root {
  --bg: #ecfdf5;
  --ink: #064e3b;
  --brand: #059669;
  --paper: #ffffff;
  --line: #a7f3d0;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: "Helvetica Neue", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  font-size: 17px;
}
a { color: #047857; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 9;
  background: var(--brand);
}
.header-inner {
  width: min(640px, calc(100% - 16px));
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px 0 12px;
}
.brand { color: #fff; text-decoration: none; display: flex; gap: 8px; align-items: center; font-weight: 800; }
.brand svg { width: 22px; height: 22px; }
.nav { display: flex; }
.nav a {
  flex: 1;
  text-align: center;
  text-decoration: none;
  color: #d1fae5;
  background: #047857;
  padding: 8px 0;
  font-size: 14px;
}
.nav a.is-current { background: #fff; color: var(--brand); font-weight: 800; }
.wrap { width: min(640px, calc(100% - 16px)); margin: 0 auto; }
.hero { padding: 18px 0 6px; }
.hero h1 { font-size: 26px; }
.cta-row { display: grid; gap: 8px; }
.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  background: var(--brand);
  color: #fff;
  text-decoration: none;
  border-radius: 12px;
  font-weight: 800;
}
.btn-mac { background: #065f46; }
.btn-ios { background: #111827; }
.btn-and { background: #3f6212; }
section { padding: 16px 0; }
.card, .review, .news-item, .faq-item {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  margin-bottom: 10px;
}
table { width: 100%; border-collapse: collapse; background: #fff; font-size: 14px; }
th, td { border: 1px solid var(--line); padding: 8px; text-align: left; }
.steps { display: grid; gap: 8px; }
.step {
  background: #fff;
  border-radius: 12px;
  padding: 12px;
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 8px;
}
.step b {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  display: grid;
  place-items: center;
}
.site-footer { background: #064e3b; color: #d1fae5; padding: 20px 16px 28px; }
.foot-nav { display: flex; justify-content: space-between; }
.foot-nav a { color: #6ee7b7; }