.page-hero {
  min-height: 38vh; display: grid; place-items: center; text-align: center;
  color: var(--white);
  background: linear-gradient(160deg, rgba(15,29,50,0.55) 0%, rgba(10,22,40,0.6) 50%, rgba(15,36,64,0.55) 100%), url(assets/product-rubber2.jpg) center/cover no-repeat;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 130px 24px 60px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 130px 24px 60px;
}
.page-hero-inner { max-width: 740px; }
.page-hero h1 { margin: 0; font-size: 2.8rem; line-height: 1.12; font-weight: 800; }
.page-hero p:last-child { margin: 18px 0 0; color: rgba(255,255,255,0.7); font-size: 1rem; }

.product-detail { display: grid; grid-template-columns: 1fr 1.1fr; gap: 48px; align-items: start; }
.detail-visual {
  position: sticky; top: 96px; min-height: 420px;
  border-radius: var(--radius); overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
  display: grid; place-items: center;
  background: linear-gradient(135deg, #0f1d32, #15294a);
  background-size: cover; background-position: center;
}
/* detail-visual::after removed */
.detail-body .lead { margin: 0 0 32px; font-size: 0.94rem; color: var(--steel); line-height: 1.7; }
.detail-body h3 { margin: 34px 0 14px; font-size: 1.15rem; color: var(--ink); }
.detail-body h3:first-of-type { margin-top: 0; }
.spec-list { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.spec-list li {
  padding: 12px 18px; background: var(--paper); border: 1px solid var(--line);
  border-radius: 6px; font-size: 0.94rem; color: var(--steel); line-height: 1.5;
}
.spec-list li strong { color: var(--ink); }
.spec-table { display: grid; gap: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.spec-table div { display: grid; grid-template-columns: 1fr 1fr; padding: 12px 18px; border-bottom: 1px solid var(--line); font-size: 0.94rem; }
.spec-table div:last-child { border-bottom: 0; }
.spec-table div span:first-child { color: var(--steel-2); }
.spec-table div span:last-child { font-weight: 700; color: var(--ink); }

.custom-steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.custom-step {
  padding: 28px; background: var(--white); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: 0 10px 28px rgba(15,23,42,0.06);
}
.custom-step span { display: inline-block; margin-bottom: 22px; color: var(--orange); font-weight: 900; font-size: 1.8rem; }
.custom-step h3 { margin: 0 0 10px; font-size: 1.15rem; }
.custom-step p { margin: 0; color: var(--steel-2); font-size: 0.94rem; }
.custom-cta { margin-top: 34px; display: flex; justify-content: center; }

@media (max-width: 1024px) {
  .page-hero h1 { font-size: 2rem; }
  .product-detail { grid-template-columns: 1fr; gap: 28px; }
  .detail-visual { position: static; min-height: 300px; }
  .custom-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .page-hero { padding-top: 110px; padding-bottom: 46px; min-height: 32vh; }
  .page-hero h1 { font-size: 1.7rem; }
  .page-hero p:last-child { font-size: 0.94rem; }
  .detail-visual { min-height: 240px; }
  .custom-steps { grid-template-columns: 1fr; }
}

#rubber-title ~ .product-detail .detail-visual { background-image: url(assets/product-rubber.png); }
#plastic-title ~ .product-detail .detail-visual { background-image: url(assets/product-plastic.png); }
#pulley-title ~ .product-detail .detail-visual { background-image: url(assets/product-pulley.png); }
#rubber-title + .product-detail .detail-visual { background-image: url(assets/product-rubber.png); }
#plastic-title + .product-detail .detail-visual { background-image: url(assets/product-plastic.png); }
#pulley-title + .product-detail .detail-visual { background-image: url(assets/product-pulley.png); }

.rubber-large { background-image: url(assets/product-rubber.png); }
.plastic-large { background-image: url(assets/product-plastic.png); }
.pulley-large { background-image: url(assets/product-pulley.png); }