:root {
  --green: #30cf79;
  --green-dark: #24a861;
  --bg: #f5f7fa;
  --text: #1a1a1a;
  --muted: #667085;
  --card: #fff;
  --line: #e4e7ec;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}
a { color: var(--green-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }

.nav {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 56px;
}
.logo { font-weight: 700; font-size: 1.1rem; color: var(--text); text-decoration: none; }
.nav nav { display: flex; gap: 20px; align-items: center; }
.nav nav a { color: var(--muted); font-size: .95rem; }

.btn {
  display: inline-block;
  background: var(--green);
  color: #fff !important;
  padding: 12px 22px;
  border-radius: 12px;
  font-weight: 600;
  text-decoration: none !important;
}
.btn:hover { background: var(--green-dark); }
.btn-sm { padding: 8px 14px; font-size: .9rem; }
.btn-ghost {
  background: transparent;
  color: var(--text) !important;
  border: 1px solid var(--line);
  margin-left: 10px;
}

.hero { padding: 72px 0 56px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 40px;
  align-items: center;
}
@media (max-width: 800px) {
  .hero-grid { grid-template-columns: 1fr; }
  .nav nav a:not(.btn) { display: none; }
}
.eyebrow { color: var(--green-dark); font-weight: 600; font-size: .9rem; }
h1 { font-size: clamp(2rem, 5vw, 3rem); line-height: 1.15; margin: .4rem 0 1rem; }
.lead { color: var(--muted); font-size: 1.1rem; max-width: 520px; }

.hero-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 24px;
  box-shadow: 0 20px 50px rgba(16,24,40,.08);
}
.mock-line { padding: 8px 0; font-size: .95rem; }
.mock-line.dim { color: var(--muted); font-size: .85rem; }
.mock-ask { margin-top: 16px; padding: 12px; background: #eefbf3; border-radius: 12px; }
.mock-reply { margin-top: 10px; padding: 12px; background: var(--bg); border-radius: 12px; }
.cite { color: var(--green-dark); font-size: .85rem; }

.section { padding: 56px 0; }
.section.alt { background: #fff; }
.section h2 { margin-top: 0; font-size: 1.6rem; }
.center { text-align: center; }

.grid-3, .grid-2 {
  display: grid;
  gap: 20px;
}
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); max-width: 720px; margin: 0 auto; }
@media (max-width: 700px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px;
}
.card.featured { border-color: var(--green); box-shadow: 0 0 0 1px var(--green); }
.card h3 { margin-top: 0; }
.price { font-size: 1.8rem; font-weight: 700; margin: .5rem 0 1rem; }
.price span { font-size: 1rem; font-weight: 500; color: var(--muted); }
.card ul { padding-left: 1.2rem; color: var(--muted); }

.modes { max-width: 640px; margin: 0 auto; padding-left: 1.2rem; }
.modes li { margin-bottom: 10px; }

.footer {
  padding: 32px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .9rem;
  text-align: center;
}

.links { margin-top: 16px; }