:root {
  --bg: #f3f6f3;
  --ink: #152019;
  --muted: #5d6a62;
  --accent: #1a6b4a;
  --line: #d5ddd7;
  --panel: #fff;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font: 16px/1.55 "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
}
a { color: var(--accent); }
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 16px 28px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  text-decoration: none;
  color: var(--ink);
  font-size: 18px;
}
.logo img { width: 28px; height: 28px; display: block; }
nav { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
nav a { text-decoration: none; color: var(--muted); }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: #fff !important;
  text-decoration: none;
  border-radius: 999px;
  padding: 8px 16px;
  font-weight: 650;
}
.btn-ghost {
  background: transparent;
  color: var(--ink) !important;
  border: 1px solid var(--line);
}
.btn-lg { padding: 12px 22px; }
.hero, .features, .pricing, footer { max-width: 980px; margin: 0 auto; padding: 48px 24px; }
.eyebrow { letter-spacing: 0.08em; color: var(--accent); font-weight: 700; margin: 0 0 8px; }
h1 { font-size: 40px; line-height: 1.15; margin: 0 0 12px; }
h2 { margin: 0 0 8px; }
.lead { color: var(--muted); font-size: 18px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 22px 0 10px; }
.fine, .hint { color: var(--muted); font-size: 13px; }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; padding-top: 0; }
.features article, .card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
}
.pricing { text-align: center; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 24px 0; text-align: left; }
.card.featured { border-color: var(--accent); box-shadow: 0 8px 24px rgba(26, 107, 74, 0.12); }
.price { font-size: 28px; font-weight: 800; margin: 8px 0; }
footer { color: var(--muted); font-size: 13px; }
@media (max-width: 800px) {
  .features, .cards { grid-template-columns: 1fr; }
  h1 { font-size: 30px; }
  .nav { padding: 12px 16px; }
}