:root {
  --green: #44b982;
  --green-dark: #2f9a68;
  --ink: #111814;
  --muted: #5b6b62;
  --line: #e6eee9;
  --bg: #f7faf8;
  --card: #ffffff;
  --radius: 18px;
  --max: 1080px;
  --font: "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: #fff;
  line-height: 1.55;
}
img { max-width: 100%; }
a { color: var(--green-dark); }
.wrap { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }

body[data-lang="en"] .zh { display: none !important; }
body[data-lang="zh"] .en { display: none !important; }

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
  font-weight: 700;
  letter-spacing: -.02em;
}
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.nav-links { display: flex; gap: 18px; margin-left: auto; align-items: center; }
.nav-links a { text-decoration: none; color: var(--muted); font-size: 14px; }
.nav-links a:hover { color: var(--ink); }
.lang {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 6px 10px;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--green);
  color: #fff !important;
  text-decoration: none;
  border-radius: 999px;
  padding: 12px 20px;
  font-weight: 600;
  font-size: 15px;
  border: 0;
}
.btn.secondary {
  background: #fff;
  color: var(--ink) !important;
  border: 1px solid var(--line);
}

.hero {
  padding: 72px 0 56px;
  background: linear-gradient(180deg, #f3faf6 0%, #fff 70%);
}
.hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1.08;
  letter-spacing: -.04em;
  margin: 0 0 16px;
  max-width: 16ch;
}
.hero p.lead {
  font-size: 20px;
  color: var(--muted);
  max-width: 42ch;
  margin: 0 0 28px;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-note { margin-top: 18px; color: var(--muted); font-size: 14px; }

.section { padding: 72px 0; }
.section.alt { background: var(--bg); }
.section h2 {
  font-size: clamp(28px, 4vw, 40px);
  letter-spacing: -.03em;
  margin: 0 0 12px;
}
.section .sub { color: var(--muted); margin: 0 0 36px; max-width: 52ch; }

.grid { display: grid; gap: 16px; }
.grid.three { grid-template-columns: repeat(3, 1fr); }
.grid.four { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.step { counter-increment: step; }
.step .num {
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--green); color: #fff;
  display: grid; place-items: center;
  font-weight: 700; margin-bottom: 12px;
}

.price-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.price {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 20px;
  background: #fff;
}
.price.featured { border-color: var(--green); box-shadow: 0 0 0 3px rgba(68,185,130,.15); }
.price .mins { font-size: 28px; font-weight: 700; letter-spacing: -.03em; }
.price .cost { font-size: 22px; margin: 8px 0 12px; }
.price .unit { color: var(--muted); font-size: 13px; }

.faq details {
  border-bottom: 1px solid var(--line);
  padding: 16px 0;
}
.faq summary { cursor: pointer; font-weight: 600; }
.faq p { color: var(--muted); margin: 10px 0 0; }

.legal { padding: 48px 0 80px; }
.legal h1 { font-size: 36px; letter-spacing: -.03em; }
.legal .meta { color: var(--muted); margin-bottom: 32px; }
.legal h2 { font-size: 20px; margin: 28px 0 8px; }
.legal p, .legal li { color: #33443c; }
.legal ul { padding-left: 20px; }

.footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: 14px;
}
.footer-inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer a { color: var(--muted); text-decoration: none; margin-right: 14px; }
.footer a:hover { color: var(--ink); }

@media (max-width: 860px) {
  .grid.three, .grid.four, .price-grid { grid-template-columns: 1fr; }
  .nav-links .hide-sm { display: none; }
}