:root {
  --product-green: #237437;
  --product-green-dark: #164d28;
  --product-mint: #e8f4eb;
  --product-coral: #d95f57;
  --product-yellow: #f5c451;
  --product-ink: #17211a;
  --product-muted: #536158;
  --product-line: #d7e2d8;
}

.product-page {
  background: #fbfdfb;
  color: var(--product-ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.75;
}

.product-container {
  width: min(100% - 48px, 1120px);
  margin: 0 auto;
}

.product-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(215, 226, 216, .9);
  background: rgba(255, 255, 255, .95);
  backdrop-filter: blur(16px);
}

.product-header-inner {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.product-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--product-ink);
  font-weight: 850;
  text-decoration: none;
}

.product-brand img { border-radius: 10px; }
.product-header nav { display: flex; gap: 24px; }
.product-header nav a { color: var(--product-muted); font-weight: 750; text-decoration: none; }

.product-hero {
  padding: 76px 0 58px;
  background: #f3f8f2;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, .88fr) minmax(460px, 1.12fr);
  align-items: center;
  gap: 54px;
}

.app-identity { display: flex; align-items: center; gap: 20px; }
.app-identity img { border-radius: 20px; box-shadow: 0 16px 34px rgba(32, 80, 43, .18); }
.app-identity p { margin: 0; color: var(--product-green); font-weight: 800; }
.product-hero h1 { margin: 34px 0 8px; font-size: clamp(3rem, 7vw, 5.7rem); line-height: 1.05; letter-spacing: 0; }
.hero-lead { margin-bottom: 24px; font-size: clamp(1.55rem, 3vw, 2.35rem); font-weight: 850; }
.hero-description { color: var(--product-muted); font-size: 1.08rem; font-weight: 650; }
.hero-points { display: flex; flex-wrap: wrap; gap: 10px; margin: 28px 0; }
.hero-points span { padding: 7px 14px; border: 1px solid #afcbb3; border-radius: 999px; background: #fff; color: var(--product-green-dark); font-size: .9rem; font-weight: 800; }
.coming-soon { display: inline-block; padding: 8px 0 8px 16px; border-left: 5px solid var(--product-green); color: var(--product-green-dark); font-weight: 850; }
.hero-visual { margin: 0; }
.hero-visual img { display: block; width: 100%; border: 1px solid var(--product-line); border-radius: 8px; box-shadow: 0 28px 60px rgba(42, 70, 47, .16); }
.hero-visual figcaption { margin-top: 10px; color: var(--product-muted); font-size: .82rem; text-align: right; }

.product-section { padding: 88px 0; }
.section-kicker { margin-bottom: 10px; color: var(--product-green); font-weight: 850; }
.product-section h2 { margin-bottom: 24px; font-size: clamp(1.9rem, 4vw, 3.25rem); line-height: 1.35; letter-spacing: 0; }
.answer-block { max-width: 900px; }
.answer-block > p:last-child { color: var(--product-muted); font-size: 1.08rem; }

.feature-band { background: #fff7f2; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-grid article { padding: 30px; border-top: 5px solid var(--product-coral); background: #fff; box-shadow: 0 12px 30px rgba(78, 52, 42, .08); }
.feature-grid strong { font-size: 1.2rem; }
.feature-grid p { margin: 12px 0 0; color: var(--product-muted); }

.privacy-layout { display: grid; grid-template-columns: minmax(0, 1fr) 340px; align-items: center; gap: 68px; }
.privacy-layout img { width: 100%; border: 1px solid var(--product-line); border-radius: 8px; box-shadow: 0 22px 48px rgba(31, 73, 40, .13); }
.fine-print { color: var(--product-muted); font-size: .86rem; }

.price-band { background: #fff9e9; }
.price-layout { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 68px; }
.price-facts { margin: 0; border: 1px solid #e4d39f; background: #fff; }
.price-facts div { display: grid; grid-template-columns: 150px 1fr; padding: 24px 28px; align-items: center; }
.price-facts div + div { border-top: 1px solid #e4d39f; }
.price-facts dt { font-weight: 800; }
.price-facts dd { margin: 0; color: var(--product-green-dark); font-size: 1.65rem; font-weight: 900; }
.price-facts small { color: var(--product-muted); font-size: .8rem; font-weight: 650; }

.facts-section { background: #f4f8fb; }
.facts-list { margin: 0; border-top: 1px solid #cfdbe2; }
.facts-list div { display: grid; grid-template-columns: 180px 1fr; gap: 24px; padding: 18px 0; border-bottom: 1px solid #cfdbe2; }
.facts-list dt { font-weight: 800; }
.facts-list dd { margin: 0; color: var(--product-muted); }

.gallery-section { overflow: hidden; }
.screenshot-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.screenshot-row img { width: 100%; border: 1px solid var(--product-line); border-radius: 8px; box-shadow: 0 18px 40px rgba(35, 67, 41, .12); }

.faq-section { background: var(--product-mint); }
.faq-list { border-top: 1px solid #bbd2c0; }
.faq-list details { padding: 22px 0; border-bottom: 1px solid #bbd2c0; }
.faq-list summary { cursor: pointer; font-size: 1.08rem; font-weight: 850; }
.faq-list p { margin: 14px 0 0; color: var(--product-muted); }

.product-footer { padding: 44px 0; background: #183c24; color: #fff; }
.product-footer .product-container { display: flex; justify-content: space-between; gap: 28px; }
.product-footer nav { display: flex; flex-wrap: wrap; gap: 20px; }
.product-footer a { color: #fff; }

@media (max-width: 820px) {
  .product-header nav { display: none; }
  .hero-inner,
  .privacy-layout,
  .price-layout { grid-template-columns: 1fr; }
  .hero-inner { gap: 36px; }
  .feature-grid { grid-template-columns: 1fr; }
  .privacy-layout img { width: min(100%, 360px); margin: 0 auto; }
  .screenshot-row { grid-template-columns: 1fr; width: min(100%, 390px); margin: 0 auto; }
  .product-footer .product-container { display: block; }
  .product-footer nav { margin-top: 20px; }
}

@media (max-width: 520px) {
  .product-container { width: min(100% - 30px, 1120px); }
  .product-hero { padding-top: 48px; }
  .product-hero h1 { font-size: 2.25rem; white-space: nowrap; }
  .product-section { padding: 64px 0; }
  .app-identity img { width: 70px; height: 70px; }
  .facts-list div,
  .price-facts div { grid-template-columns: 1fr; gap: 4px; }
}