:root {
  --ink: #0f172a;
  --muted: #475569;
  --line: #e2e8f0;
  --bg: #ffffff;
  --soft: #f8fafc;
  --brand: #0f766e;
  --brand-dark: #0d9488;
  --accent: #f0fdfa;
  --radius: 16px;
  --max: 1080px;
  --font: "Segoe UI", system-ui, -apple-system, "Noto Sans TC", "PingFang HK", "Helvetica Neue", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }
.wrap { width: min(var(--max), calc(100% - 2rem)); margin: 0 auto; }
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding: .9rem 0;
}
.logo {
  font-weight: 700; letter-spacing: -.02em; color: var(--ink);
  text-decoration: none; font-size: 1.05rem;
}
.logo span { color: var(--brand); }
.nav-links { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.nav-links a { color: var(--muted); font-size: .95rem; text-decoration: none; }
.nav-links a:hover { color: var(--ink); }
.lang-toggle {
  border: 1px solid var(--line); background: #fff; border-radius: 999px;
  padding: .25rem .7rem; cursor: pointer; color: var(--ink); font: inherit;
}
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: .4rem; border-radius: 999px; padding: .7rem 1.15rem;
  font-weight: 600; border: 1px solid transparent; cursor: pointer;
  text-decoration: none; font: inherit;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); text-decoration: none; }
.btn-ghost { background: #fff; border-color: var(--line); color: var(--ink); }
.btn-ghost:hover { border-color: #cbd5e1; text-decoration: none; }
.hero {
  padding: 4.5rem 0 3rem;
  background:
    radial-gradient(ellipse 80% 50% at 10% -20%, #ccfbf1 0%, transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 0%, #e0f2fe 0%, transparent 50%),
    var(--bg);
}
.hero-grid {
  display: grid; gap: 2rem; align-items: center;
  grid-template-columns: 1.2fr .8fr;
}
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .nav-links .hide-sm { display: none; }
}
.eyebrow {
  display: inline-block; font-size: .8rem; font-weight: 600;
  color: var(--brand); background: var(--accent); border-radius: 999px;
  padding: .25rem .7rem; margin-bottom: 1rem;
}
h1 {
  font-size: clamp(2rem, 4vw, 3rem); line-height: 1.15;
  letter-spacing: -.03em; margin: 0 0 1rem;
}
.lede { font-size: 1.1rem; color: var(--muted); margin: 0 0 1.5rem; max-width: 36rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-bottom: 1rem; }
.fine { font-size: .85rem; color: var(--muted); margin: 0; }
.card-panel {
  background: #fff; border: 1px solid var(--line); border-radius: 24px;
  padding: 1.25rem; box-shadow: 0 20px 50px rgba(15,23,42,.06);
}
.card-panel h3 { margin: 0 0 .75rem; font-size: 1rem; }
.checklist { list-style: none; padding: 0; margin: 0; display: grid; gap: .65rem; }
.checklist li {
  display: flex; gap: .6rem; align-items: flex-start;
  color: var(--ink); font-size: .95rem;
}
.checklist li::before {
  content: "✓"; color: var(--brand); font-weight: 700; margin-top: .05rem;
}
.section { padding: 3.5rem 0; }
.section.alt { background: var(--soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section h2 {
  font-size: clamp(1.5rem, 3vw, 2rem); letter-spacing: -.02em;
  margin: 0 0 .75rem;
}
.section .intro { color: var(--muted); max-width: 40rem; margin: 0 0 2rem; }
.grid-3 {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(3, 1fr);
}
@media (max-width: 800px) { .grid-3 { grid-template-columns: 1fr; } }
.feature {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.25rem;
}
.feature .icon {
  width: 2.25rem; height: 2.25rem; border-radius: 10px;
  background: var(--accent); color: var(--brand);
  display: grid; place-items: center; font-weight: 700; margin-bottom: .85rem;
}
.feature h3 { margin: 0 0 .4rem; font-size: 1.05rem; }
.feature p { margin: 0; color: var(--muted); font-size: .95rem; }
.steps { display: grid; gap: 1rem; grid-template-columns: repeat(3, 1fr); }
@media (max-width: 800px) { .steps { grid-template-columns: 1fr; } }
.step {
  padding: 1.25rem; border-radius: var(--radius); background: #fff;
  border: 1px solid var(--line);
}
.step .n {
  font-weight: 700; color: var(--brand); font-size: .85rem; margin-bottom: .4rem;
}
.pricing {
  display: grid; gap: 1rem; grid-template-columns: repeat(2, 1fr); max-width: 760px;
}
@media (max-width: 700px) { .pricing { grid-template-columns: 1fr; } }
.price-card {
  border: 1px solid var(--line); border-radius: 20px; padding: 1.5rem; background: #fff;
}
.price-card.featured { border-color: var(--brand); box-shadow: 0 0 0 3px #ccfbf1; }
.price-card h3 { margin: 0 0 .25rem; }
.price-card .amount { font-size: 2rem; font-weight: 700; letter-spacing: -.03em; margin: .5rem 0; }
.price-card .amount small { font-size: .95rem; font-weight: 500; color: var(--muted); }
.price-card ul { margin: 1rem 0 0; padding-left: 1.1rem; color: var(--muted); }
.waitlist {
  background: linear-gradient(180deg, #0f766e 0%, #115e59 100%);
  color: #fff; border-radius: 28px; padding: 2rem;
}
.waitlist h2 { color: #fff; margin-top: 0; }
.waitlist p { color: #ccfbf1; }
.waitlist-form { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1rem; }
.waitlist-form input {
  flex: 1 1 220px; border-radius: 999px; border: none; padding: .85rem 1rem;
  font: inherit;
}
.waitlist-form button { white-space: nowrap; }
.waitlist .note { font-size: .85rem; color: #99f6e4; margin-top: .75rem; }
.site-footer {
  padding: 2.5rem 0 3rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem;
}
.footer-grid {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem;
}
.footer-grid nav { display: flex; flex-wrap: wrap; gap: 1rem; }
.footer-grid a { color: var(--muted); }
.disclaimer {
  margin-top: 1.25rem; padding-top: 1.25rem; border-top: 1px solid var(--line);
  font-size: .8rem; max-width: 48rem;
}
.page-hero { padding: 3rem 0 1.5rem; }
.prose { max-width: 42rem; }
.prose h2 { margin-top: 2rem; }
.prose p, .prose li { color: var(--muted); }
.badge {
  display: inline-block; font-size: .75rem; font-weight: 600;
  background: #ecfeff; color: #0e7490; border-radius: 999px; padding: .15rem .55rem;
}
[data-lang="en"] .zh, [data-lang="zh"] .en { display: none; }