/* ============================================================
   product-dtc.css — DTC 商品頁共用樣式
   ============================================================ */

/* ── Accent (per-product override via --prod-accent) ── */
:root {
  --prod-accent: #e85d04;
  --prod-accent-lt: #f48c06;
  --prod-accent-bg: rgba(232, 93, 4, .08);
}

/* ── Layout ── */
.pdp-wrap { max-width: 1400px; margin: 0 auto; padding: 40px 64px 80px; }
.pdp-hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.pdp-gallery { position: sticky; top: calc(var(--nav-h) + 20px); }
.pdp-main-img {
  width: 100%; height: auto;
  object-fit: contain;
  background: #0a0a0a;
  display: block;
  border-radius: 4px;
}
.pdp-thumbs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-top: 10px;
}
.pdp-thumb {
  aspect-ratio: 1;
  object-fit: cover;
  cursor: pointer;
  opacity: .55;
  transition: opacity var(--tf), border-color var(--tf);
  border: 2px solid transparent;
  border-radius: 3px;
}
.pdp-thumb:hover, .pdp-thumb.active {
  opacity: 1;
  border-color: var(--prod-accent);
}
.pdp-badges { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.pdp-badge {
  font-size: 12px;
  letter-spacing: 1.5px;
  padding: 5px 12px;
  border-radius: 3px;
}
.pdp-badge.hot { background: var(--prod-accent); color: #fff; }
.pdp-badge.outline { border: 1px solid var(--border); color: var(--muted); }

/* ── Buy Box ── */
.pdp-buybox { position: relative; }
.pdp-rating {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.pdp-stars { display: flex; gap: 2px; color: var(--gold); }
.pdp-stars svg { width: 16px; height: 16px; fill: currentColor; }
.pdp-rating-text { font-size: 13px; color: var(--muted); }
.pdp-rating-text strong { color: var(--g700); }
.pdp-title {
  font-family: 'Noto Sans TC', sans-serif;
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: 900;
  color: var(--g700);
  line-height: 1.2;
  margin-bottom: 8px;
}
.pdp-subtitle { font-size: 13px; color: var(--muted); letter-spacing: 1px; margin-bottom: 16px; }
.pdp-tagline {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 20px;
}
.pdp-tagline strong { color: var(--g700); }

/* Benefit bullets — 3 sec scan */
.pdp-benefits {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}
.pdp-benefit-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 14px;
  background: var(--cream);
  border-radius: 8px;
  border-left: 3px solid var(--prod-accent);
}
.pdp-benefit-icon {
  width: 32px; height: 32px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--prod-accent-bg);
  border-radius: 50%;
  color: var(--prod-accent);
}
.pdp-benefit-icon svg { width: 16px; height: 16px; }
.pdp-benefit-item strong {
  display: block;
  font-size: 14px;
  color: var(--g700);
  margin-bottom: 2px;
}
.pdp-benefit-item span { font-size: 13px; color: var(--muted); line-height: 1.5; }

/* Audience pills */
.pdp-audience {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}
.pdp-audience span {
  padding: 6px 14px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 13px;
  color: var(--g700);
  font-weight: 500;
}

.pdp-price-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 6px;
}
.pdp-price {
  font-family: 'Playfair Display', serif;
  font-size: clamp(36px, 4vw, 48px);
  color: var(--prod-accent);
  line-height: 1;
  display: inline-flex;
  align-items: baseline;
  gap: 2px;
}
.pdp-price-currency {
  font-size: clamp(16px, 1.6vw, 22px);
  font-weight: 400;
  letter-spacing: 0.5px;
  opacity: 0.85;
  margin-bottom: 2px;
}
.pdp-price-number {
  font-size: clamp(44px, 5.2vw, 64px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -1px;
}
.pdp-price-unit { font-size: 14px; color: var(--muted); }
.pdp-member-note { font-size: 13px; color: var(--muted); margin-bottom: 20px; }
.pdp-member-note a { color: var(--gold); font-weight: 600; }

.pdp-cta-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  margin-bottom: 16px;
}
.btn-pdp-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 24px;
  background: var(--prod-accent);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1px;
  border-radius: 40px;
  border: none;
  transition: all .3s;
  text-decoration: none;
  min-height: 52px;
}
.btn-pdp-primary:hover {
  background: var(--prod-accent-lt);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(232, 93, 4, .35);
}
.btn-pdp-secondary {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px 28px;
  background: var(--g700);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  border-radius: 40px;
  text-decoration: none;
  white-space: nowrap;
  min-height: 52px;
  transition: all var(--tf);
}
.btn-pdp-secondary:hover { background: var(--g600); color: #fff; }

.pdp-trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.pdp-trust-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}
.pdp-trust-item svg { width: 15px; height: 15px; color: var(--prod-accent); flex-shrink: 0; }

/* ── Content Sections ── */
.pdp-section {
  padding: 72px 0;
  border-top: 1px solid var(--border);
}
.pdp-section:first-of-type { border-top: none; padding-top: 56px; }
.pdp-section-head { text-align: center; margin-bottom: 48px; }
.pdp-section-head .section-title { margin-bottom: 12px; }
.pdp-section-head .section-desc { margin: 0 auto; }

/* Benefits grid */
.pdp-benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.pdp-benefit-card {
  padding: 32px 28px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  text-align: center;
  transition: all var(--t);
}
.pdp-benefit-card:hover {
  border-color: var(--prod-accent);
  box-shadow: 0 12px 40px rgba(0, 0, 0, .06);
  transform: translateY(-4px);
}
.pdp-benefit-card .icon-wrap {
  width: 56px; height: 56px;
  margin: 0 auto 18px;
  display: flex; align-items: center; justify-content: center;
  background: var(--prod-accent-bg);
  border-radius: 50%;
  color: var(--prod-accent);
}
.pdp-benefit-card h3 {
  font-size: 17px;
  color: var(--g700);
  margin-bottom: 10px;
  font-weight: 700;
}
.pdp-benefit-card p { font-size: 14px; color: var(--muted); line-height: 1.7; }

/* How to use */
.pdp-usage-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  max-width: 900px;
  margin: 0 auto;
}
.pdp-step { text-align: center; }
.pdp-step-num {
  width: 48px; height: 48px;
  margin: 0 auto 16px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--g700), var(--g500));
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  border-radius: 50%;
}
.pdp-step h4 { font-size: 16px; color: var(--g700); margin-bottom: 8px; }
.pdp-step p { font-size: 14px; color: var(--muted); line-height: 1.65; }

/* Ingredients */
.pdp-ingredients-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.pdp-ingredient-card {
  padding: 24px;
  background: var(--cream);
  border-radius: 10px;
  border-left: 4px solid var(--prod-accent);
}
.pdp-ingredient-card h4 { font-size: 16px; color: var(--g700); margin-bottom: 8px; }
.pdp-ingredient-card p { font-size: 14px; color: var(--muted); line-height: 1.7; }

/* Research */
.pdp-research-list { max-width: 800px; margin: 0 auto; }
.pdp-research-item {
  padding: 20px 24px;
  background: #fff;
  border: 1px solid var(--border);
  border-left: 4px solid var(--gold);
  border-radius: 0 8px 8px 0;
  margin-bottom: 16px;
}
.pdp-research-item strong {
  display: block;
  font-size: 15px;
  color: var(--g700);
  margin-bottom: 6px;
}
.pdp-research-item p { font-size: 13px; color: var(--muted); line-height: 1.75; }
.pdp-research-item .cite { font-size: 13px; color: var(--gold); margin-top: 8px; font-style: italic; }

/* Before / After */
.pdp-ba-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 24px;
  align-items: center;
  max-width: 900px;
  margin: 0 auto;
}
.pdp-ba-card {
  padding: 28px 24px;
  border-radius: 12px;
  text-align: center;
}
.pdp-ba-card.before { background: #f5f5f5; border: 1px solid #e0e0e0; }
.pdp-ba-card.after { background: var(--cream); border: 1px solid var(--border); }
.pdp-ba-label {
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 16px;
  font-weight: 700;
}
.pdp-ba-card.before .pdp-ba-label { color: #999; }
.pdp-ba-card.after .pdp-ba-label { color: var(--prod-accent); }
.pdp-ba-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-align: left;
}
.pdp-ba-card li {
  font-size: 14px;
  color: var(--muted);
  padding-left: 20px;
  position: relative;
  line-height: 1.5;
}
.pdp-ba-card.before li::before { content: '—'; position: absolute; left: 0; color: #bbb; }
.pdp-ba-card.after li::before { content: '✓'; position: absolute; left: 0; color: var(--prod-accent); font-weight: 700; }
.pdp-ba-arrow {
  font-size: 28px;
  color: var(--prod-accent);
  font-weight: 300;
}

/* Reviews */
.pdp-reviews-summary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.pdp-reviews-score { text-align: center; }
.pdp-reviews-score .big {
  font-family: 'Playfair Display', serif;
  font-size: 56px;
  color: var(--g700);
  line-height: 1;
}
.pdp-reviews-score .pdp-stars { justify-content: center; margin: 8px 0; }
.pdp-reviews-bars { flex: 1; max-width: 280px; }
.pdp-bar-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
  font-size: 13px;
  color: var(--muted);
}
.pdp-bar-track {
  flex: 1;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}
.pdp-bar-fill { height: 100%; background: var(--gold); border-radius: 3px; }

.pdp-reviews-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.pdp-review-card {
  padding: 24px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
}
.pdp-review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.pdp-review-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--g700), var(--g500));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}
.pdp-review-meta strong { display: block; font-size: 14px; color: var(--g700); }
.pdp-review-meta span { font-size: 13px; color: var(--muted); }
.pdp-review-card .pdp-stars svg { width: 13px; height: 13px; }
.pdp-review-text { font-size: 14px; color: var(--muted); line-height: 1.75; }
.pdp-review-verified {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 10px;
  font-size: 12px;
  color: var(--g500);
  font-weight: 600;
}

/* FAQ Accordion */
.pdp-faq-list { max-width: 760px; margin: 0 auto; }
.pdp-faq-item {
  border-bottom: 1px solid var(--border);
}
.pdp-faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--g700);
  text-align: left;
  cursor: pointer;
  transition: color var(--tf);
}
.pdp-faq-q:hover { color: var(--prod-accent); }
.pdp-faq-q svg {
  width: 18px; height: 18px;
  flex-shrink: 0;
  transition: transform .3s;
  color: var(--muted);
}
.pdp-faq-item.open .pdp-faq-q svg { transform: rotate(180deg); }
.pdp-faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
}
.pdp-faq-a-inner {
  padding: 0 0 20px;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.8;
}

/* Bundle */
.pdp-bundle-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.pdp-bundle-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: all var(--t);
}
.pdp-bundle-card:hover {
  border-color: var(--prod-accent);
  box-shadow: 0 16px 48px rgba(0, 0, 0, .08);
  transform: translateY(-4px);
}
.pdp-bundle-card.featured {
  border-color: var(--prod-accent);
  position: relative;
}
.pdp-bundle-card.featured::before {
  content: '最推薦';
  position: absolute;
  top: 12px; right: 12px;
  z-index: 2;
  padding: 4px 12px;
  background: var(--prod-accent);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  border-radius: 20px;
}
.pdp-bundle-img { height: 180px; object-fit: cover; width: 100%; }
.pdp-bundle-body { padding: 24px; }
.pdp-bundle-body h3 { font-size: 17px; color: var(--g700); margin-bottom: 8px; }
.pdp-bundle-body p { font-size: 13px; color: var(--muted); line-height: 1.65; margin-bottom: 14px; }
.pdp-bundle-price {
  font-family: 'Playfair Display', serif;
  font-size: 24px;
  color: var(--prod-accent);
  margin-bottom: 14px;
}
.pdp-bundle-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--g700);
  transition: gap var(--tf), color var(--tf);
}
.pdp-bundle-link:hover { color: var(--prod-accent); gap: 10px; }

/* Spec tabs (legal info) */
.pdp-spec-tabs { margin-top: 0; }
.pdp-tab-nav {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.pdp-tab-btn {
  padding: 12px 20px;
  font-size: 14px;
  color: var(--muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all var(--tf);
  background: none;
  font-family: inherit;
}
.pdp-tab-btn.act { color: var(--g700); border-bottom-color: var(--prod-accent); font-weight: 600; }
.pdp-tab-pane { display: none; }
.pdp-tab-pane.act { display: block; }
.pdp-tab-pane p, .pdp-tab-pane li { font-size: 14px; color: var(--muted); line-height: 1.85; }
.pdp-tab-pane ul { padding-left: 20px; list-style: disc; display: flex; flex-direction: column; gap: 8px; }
.pdp-spec-table {
  width: 100%;
  border: 1px solid var(--border);
  border-collapse: collapse;
}
.pdp-spec-table tr { border-bottom: 1px solid var(--border); }
.pdp-spec-table td { padding: 11px 16px; font-size: 13px; }
.pdp-spec-table td:first-child { background: var(--cream); color: var(--g700); font-weight: 500; width: 130px; }
.pdp-nutrition-table {
  width: 100%;
  border: 1px solid var(--border);
  border-collapse: collapse;
  font-size: 13px;
}
.pdp-nutrition-table th, .pdp-nutrition-table td {
  padding: 10px 14px;
  border: 1px solid var(--border);
  text-align: center;
}
.pdp-nutrition-table th { background: var(--cream); color: var(--g700); }
.pdp-nutrition-table td:first-child { text-align: left; background: var(--cream); color: var(--g700); font-weight: 500; }

/* ── Sticky CTA Bar ── */
.pdp-sticky-cta {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 900;
  background: rgba(255, 255, 255, .97);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--border);
  box-shadow: 0 -4px 24px rgba(0, 0, 0, .08);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transform: translateY(100%);
  transition: transform .35s ease;
}
.pdp-sticky-cta.visible { transform: translateY(0); }
.pdp-sticky-info { display: flex; align-items: center; gap: 14px; min-width: 0; }
.pdp-sticky-thumb {
  width: 44px; height: 44px;
  object-fit: contain;
  background: #111;
  border-radius: 6px;
  flex-shrink: 0;
}
.pdp-sticky-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--g700);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.pdp-sticky-price {
  font-size: 18px;
  font-weight: 700;
  color: var(--prod-accent);
  flex-shrink: 0;
}
.pdp-sticky-actions {
  display: flex;
  gap: 10px;
  flex-shrink: 0;
}
.pdp-sticky-actions .btn-pdp-primary { padding: 12px 28px; min-height: 44px; font-size: 13px; }

/* Desktop inline sticky buybox */
@media (min-width: 1101px) {
  .pdp-buybox-sticky {
    position: sticky;
    top: calc(var(--nav-h) + 20px);
  }
}

/* Full-bleed section backgrounds */
.pdp-section-full {
  margin-left: -64px;
  margin-right: -64px;
  padding-left: 64px;
  padding-right: 64px;
}
.pdp-section-cream { background: var(--cream); }
.pdp-section-dark { background: var(--g800); }

@media (max-width: 1100px) {
  .pdp-wrap { padding: 32px 40px 64px; }
  .pdp-hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .pdp-gallery { position: static; }
  .pdp-benefits-grid { grid-template-columns: 1fr 1fr; }
  .pdp-reviews-list { grid-template-columns: 1fr; }
  .pdp-bundle-grid { grid-template-columns: 1fr 1fr; }
  .pdp-ingredients-grid { grid-template-columns: 1fr; }
  .pdp-section-full { margin-left: -40px; margin-right: -40px; padding-left: 40px; padding-right: 40px; }
}

@media (max-width: 768px) {
  .pdp-wrap { padding: 24px 24px 100px; }
  .pdp-benefits-grid { grid-template-columns: 1fr; }
  .pdp-usage-steps { grid-template-columns: 1fr; gap: 24px; }
  .pdp-ba-grid { grid-template-columns: 1fr; }
  .pdp-ba-arrow { transform: rotate(90deg); text-align: center; }
  .pdp-bundle-grid { grid-template-columns: 1fr; }
  .pdp-cta-row { grid-template-columns: 1fr; }
  .pdp-sticky-name { display: none; }
  .pdp-sticky-actions { flex: 1; }
  .pdp-sticky-actions .btn-pdp-primary { flex: 1; }
  .pdp-section-full { margin-left: -24px; margin-right: -24px; padding-left: 24px; padding-right: 24px; }
  #backTop { bottom: 88px !important; }
  .breadcrumb-bar { padding-left: 24px !important; padding-right: 24px !important; }
}