/* ========== PRODUCT PAGE — ERV.hk ========== */
body.product-page { padding-top: 0; }

.breadcrumb {
  background: var(--bg-alt);
  border-bottom: 1px solid var(--line);
  padding: 14px 0;
  font-size: 13px;
  color: var(--muted);
}
.breadcrumb .container { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.breadcrumb a { color: var(--muted); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span.sep { color: var(--muted); opacity: 0.5; }
.bc-current { color: var(--ink); font-weight: 600; }

.ph-hero {
  background:
    radial-gradient(circle at 12% 20%, rgba(0,35,255,0.08), transparent 55%),
    linear-gradient(180deg, #f4f5fa 0%, #ffffff 70%);
  padding: 80px 0 80px;
  position: relative;
  overflow: hidden;
}
.ph-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 60px;
  align-items: center;
}
.ph-copy .ph-eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 14px;
}
.ph-copy h1 {
  font-size: clamp(2.2rem, 4.6vw, 3.6rem);
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}
.ph-copy .ph-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  background: var(--accent);
  color: #1a0e00;
  padding: 4px 12px;
  border-radius: 100px;
  margin-bottom: 18px;
  text-transform: uppercase;
}
.ph-copy .ph-sub {
  font-size: clamp(1rem, 1.4vw, 1.18rem);
  color: var(--muted);
  line-height: 1.65;
  max-width: 540px;
  margin-bottom: 32px;
}
.ph-quick {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-bottom: 36px;
  max-width: 480px;
}
.ph-quick-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 18px;
}
.ph-quick-item .pq-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 4px;
}
.ph-quick-item .pq-value {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.ph-actions { display: inline-flex; gap: 14px; flex-wrap: wrap; align-items: center; }

.ph-visual {
  background: #fff;
  border-radius: 28px;
  border: 1px solid var(--line);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1/1;
  max-width: 540px;
  margin-left: auto;
  box-shadow: 0 30px 60px rgba(0,27,184,0.10);
}
.ph-visual img { width: 100%; height: 100%; object-fit: contain; }

/* Highlights */
.ph-highlights { padding: 100px 0; background: #fff; }
.ph-h-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.ph-h-card {
  background: var(--bg-alt);
  border-radius: 18px;
  padding: 32px 28px;
}
.ph-h-icon {
  width: 48px; height: 48px;
  background: var(--primary-tint);
  color: var(--primary-dark);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
  font-size: 18px;
  font-weight: 700;
}
.ph-h-card h4 { margin-bottom: 10px; font-size: 1.1rem; }
.ph-h-card p { font-size: 14.5px; color: var(--muted); line-height: 1.6; }

/* Spec block */
.ph-specs { padding: 100px 0; background: var(--bg-alt); }
.ph-spec-wrap {
  max-width: 920px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 48px;
}
.ph-spec-wrap h2 {
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
  margin-bottom: 28px;
  letter-spacing: -0.02em;
}
.ph-spec-table { width: 100%; border-collapse: collapse; }
.ph-spec-table tr { border-bottom: 1px solid var(--line-soft); }
.ph-spec-table tr:last-child { border-bottom: none; }
.ph-spec-table td {
  padding: 14px 0;
  font-size: 15px;
  vertical-align: top;
}
.ph-spec-table td:first-child {
  color: var(--muted);
  font-weight: 500;
  width: 38%;
}
.ph-spec-table td:last-child {
  color: var(--ink);
  font-weight: 600;
  text-align: right;
}

/* Related */
.ph-related { padding: 100px 0; background: #fff; }
.ph-rel-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.ph-rel-card {
  background: var(--bg-alt);
  border-radius: 16px;
  padding: 24px;
  display: flex; flex-direction: column;
  transition: transform 0.3s var(--ease), background 0.3s;
}
.ph-rel-card:hover { transform: translateY(-3px); background: var(--bg-tint); }
.ph-rel-card img { width: 100%; height: 160px; object-fit: contain; margin-bottom: 16px; background: #fff; border: 1px solid var(--line-soft); border-radius: 10px; padding: 6px; }
.ph-rel-card h4 { margin-bottom: 6px; }
.ph-rel-card p { font-size: 13.5px; color: var(--muted); margin-bottom: 12px; flex: 1; }
.ph-rel-link { font-size: 13px; font-weight: 600; color: var(--primary); }

/* CTA */
.ph-cta { padding: 100px 0; background: var(--bg-deep); color: #fff; text-align: center; }
.ph-cta h2 { color: #fff; margin-bottom: 16px; font-size: clamp(1.8rem, 3.2vw, 2.6rem); }
.ph-cta p { color: rgba(255,255,255,0.72); max-width: 560px; margin: 0 auto 30px; font-size: 1.05rem; }
.ph-cta .btn-pill { background: var(--accent); color: #1a0e00; }
.ph-cta .btn-pill:hover { background: var(--accent-warm); color: #fff; }

@media (max-width: 1024px) {
  .ph-grid { grid-template-columns: 1fr; gap: 40px; }
  .ph-visual { margin: 0 auto; max-width: 420px; }
  .ph-h-grid { grid-template-columns: 1fr 1fr; }
  .ph-rel-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .ph-hero { padding: 50px 0 60px; }
  .ph-spec-wrap { padding: 32px 24px; }
  .ph-h-grid { grid-template-columns: 1fr; }
  .ph-rel-grid { grid-template-columns: 1fr; }
  .ph-quick { grid-template-columns: 1fr; max-width: none; }
  .ph-highlights, .ph-specs, .ph-related, .ph-cta { padding: 70px 0; }
}