:root {
  --bg: #f7f5f1;
  --surface: #ffffff;
  --ink: #1a1a1a;
  --muted: #5c5c5c;
  --line: #e6e2da;
  --accent: #1f4b3a;
  --accent-hover: #16382c;
  --soft: #e8f0ec;
  --warn: #8a5a00;
  --warn-bg: #fff6e5;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(26, 26, 26, 0.06);
  --max: 960px;
  --font: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, 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: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); }
.container { width: min(100% - 2rem, var(--max)); margin-inline: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  background: rgba(247, 245, 241, 0.9);
  border-bottom: 1px solid var(--line);
}
.site-header .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
}
.brand {
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--ink);
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 0.95rem;
  border-radius: 999px;
  background: var(--accent);
  color: #fff !important;
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
}
.nav-cta:hover { background: var(--accent-hover); }

.hero {
  padding: 2.5rem 0 1.5rem;
}
.hero-grid {
  display: grid;
  gap: 1.75rem;
}
@media (min-width: 820px) {
  .hero-grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 2.5rem;
  }
}
.cover-wrap {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  padding: 1rem;
  box-shadow: var(--shadow);
}
.cover-wrap img {
  border-radius: 12px;
  width: 100%;
  aspect-ratio: 1 / 1.25;
  object-fit: cover;
  background: #eee;
}
.eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent);
  background: var(--soft);
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  margin-bottom: 0.85rem;
}
h1 {
  font-size: clamp(1.7rem, 4vw, 2.35rem);
  line-height: 1.25;
  margin: 0 0 0.75rem;
  letter-spacing: -0.02em;
}
.lead {
  color: var(--muted);
  font-size: 1.05rem;
  margin: 0 0 1.25rem;
}
.price-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.55rem 0.9rem;
  margin-bottom: 1.25rem;
}
.price {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}
.price-usd {
  color: var(--muted);
  font-size: 0.98rem;
}
.badge {
  font-size: 0.8rem;
  font-weight: 700;
  background: #fff;
  border: 1px solid var(--line);
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
}
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.9rem 1.25rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary {
  background: var(--accent);
  color: #fff !important;
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary {
  background: #fff;
  color: var(--ink) !important;
  border-color: var(--line);
}
.btn-secondary:hover { background: #f2f0eb; }
.note {
  font-size: 0.88rem;
  color: var(--warn);
  background: var(--warn-bg);
  border: 1px solid #f0dfb5;
  border-radius: 12px;
  padding: 0.7rem 0.9rem;
  margin: 0;
}
.trust {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 1rem;
  margin-top: 1rem;
  color: var(--muted);
  font-size: 0.9rem;
}
.trust span::before {
  content: "✓ ";
  color: var(--accent);
  font-weight: 700;
}

section {
  padding: 2.25rem 0;
}
.section-title {
  font-size: 1.45rem;
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}
.includes ul {
  margin: 0;
  padding-left: 1.15rem;
}
.includes li { margin: 0.35rem 0; }

.preview-grid {
  display: grid;
  gap: 1rem;
}
@media (min-width: 700px) {
  .preview-grid { grid-template-columns: repeat(3, 1fr); }
}
.preview-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.preview-card img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  background: #eee;
}
.preview-card figcaption {
  padding: 0.75rem 0.9rem 1rem;
  font-size: 0.92rem;
  color: var(--muted);
}

.steps {
  display: grid;
  gap: 0.85rem;
  counter-reset: step;
}
.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.85rem;
  align-items: start;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
}
.step::before {
  counter-increment: step;
  content: counter(step);
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 999px;
  background: var(--soft);
  color: var(--accent);
  font-weight: 800;
  display: grid;
  place-items: center;
}
.step h3 { margin: 0 0 0.2rem; font-size: 1rem; }
.step p { margin: 0; color: var(--muted); font-size: 0.95rem; }

.faq details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.9rem 1rem;
  margin-bottom: 0.65rem;
}
.faq summary {
  cursor: pointer;
  font-weight: 700;
}
.faq details p {
  margin: 0.65rem 0 0;
  color: var(--muted);
}

.buy-panel {
  background: linear-gradient(180deg, #ffffff 0%, #f2f7f4 100%);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  text-align: center;
}
.buy-panel h2 { margin-top: 0; }
.buy-panel .price { margin: 0.4rem 0; }

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.75rem 0 2.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}
.site-footer a { color: var(--muted); }

.success-wrap {
  min-height: 70vh;
  display: grid;
  place-items: center;
  padding: 3rem 0;
}
.success-card { max-width: 560px; }
.success-card h1 { font-size: 1.8rem; }