.feature-rail {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px;
}
.feature-rail .feature-card { height: 100%; }
.logo-row {
  display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 12px; margin-top: 18px;
}
.logo-pill {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 14px; text-align: center; color: var(--muted); font-weight: 600; font-size: .9rem; transition: border-color var(--transition), color var(--transition), transform var(--transition);
}
.logo-pill:hover { border-color: #bdbdb8; color: var(--text); transform: translateY(-2px); }
.metric-card {
  border: 1px solid var(--border); background: var(--surface); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow);
}
.placeholder-visual {
  min-height: 340px; border-radius: var(--radius); border: 1px solid var(--border); background: #f3f3f1; display: grid; place-items: center; color: var(--muted); font-weight: 600;
}

.logo-row[data-university-list] { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.section-muted { background: #f7f7f5; }
.process-card { padding: 28px; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); }
.process-card > span { width: 38px; height: 38px; display: grid; place-items: center; margin-bottom: 38px; border-radius: 50%; background: #f1f1ef; color: var(--text); font: 600 .8rem var(--font-interface); letter-spacing: .1em; }
.process-card h3 { font-size: 1.12rem; }
.process-card p:last-child { margin-bottom: 0; }
.container-wide { width: min(1380px, calc(100% - 40px)); }
.detail-layout { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(310px, 0.85fr); gap: clamp(24px, 4vw, 48px); margin-top: 24px; align-items: start; }
.pdf-preview { overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius); background: #f2f2ef; box-shadow: 0 16px 40px rgba(17,17,17,.09); }
.pdf-preview-heading { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 10px; padding: 14px 20px; border-bottom: 1px solid var(--border); background: #fff; }
.pdf-page-container { display: flex; justify-content: center; align-items: flex-start; min-height: 680px; max-height: 88vh; overflow-y: auto; overflow-x: auto; padding: 24px 20px; background: #e7e7e2; }
.pdf-page-container img { display: block; width: 100%; max-width: 880px; height: auto; background: #fff; border-radius: 4px; box-shadow: 0 8px 30px rgba(17,17,17,.2); transition: opacity 160ms ease; }
.pdf-preview-controls { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 18px; border-top: 1px solid var(--border); background: #fff; }
.pdf-controls-nav { display: flex; align-items: center; gap: 10px; }
.pdf-controls-zoom { display: flex; align-items: center; gap: 6px; }
.pdf-preview-controls [data-pdf-page-label] { min-width: 95px; color: var(--text); font-size: .88rem; font-weight: 600; text-align: center; }
.pdf-preview-controls .btn { min-height: 38px; padding: 6px 14px; font-size: .86rem; }
.pdf-preview-controls .btn-icon { width: 34px; height: 34px; min-height: 34px; padding: 0; display: inline-grid; place-items: center; font-size: 1.15rem; font-weight: 700; line-height: 1; border-radius: 6px; }
.pdf-preview-controls .btn-sm { min-height: 34px; padding: 4px 10px; font-size: .8rem; }
.pdf-preview-controls .zoom-label { min-width: 44px; text-align: center; font-size: .82rem; color: var(--muted); font-weight: 600; }
.pdf-preview-controls .btn:disabled { cursor: not-allowed; opacity: .45; }
.material-description { white-space: pre-wrap; overflow-wrap: anywhere; line-height: 1.75; }
.detail-preview-paper { min-height: 440px; padding: clamp(24px, 4vw, 52px); border: 1px solid var(--border); border-radius: var(--radius); background: #f5f5f3; box-shadow: inset 0 0 0 10px #fff; }
.detail-preview-paper h2 { margin: 40px 0 16px; max-width: 420px; }
.detail-preview-paper .hero-visual-line { margin-top: 22px; }
.detail-info h1 { margin: 18px 0; font-size: clamp(2rem, 4vw, 3.2rem); }
.detail-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; margin: 28px 0; border-top: 1px solid var(--border); }
.detail-meta > div { padding: 13px 0; border-bottom: 1px solid var(--border); }
.detail-meta dt { color: var(--muted); font-size: .8rem; }
.detail-meta dd { margin: 4px 0 0; font-weight: 600; }
.purchase-panel { position: sticky; top: 100px; padding: 26px; border: 1px solid var(--border); border-radius: var(--radius); background: #fafaf9; box-shadow: 0 10px 28px rgba(17,17,17,.045); }
.purchase-panel .btn { width: 100%; }
.detail-price { margin: 4px 0 18px; font: 700 1.75rem var(--font-brand); }
.detail-price span { font: 400 .9rem var(--font-interface); color: var(--muted); }
.checkout-container { max-width: 1000px; }
.checkout-layout { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(260px, .8fr); gap: 28px; align-items: start; }
.checkout-summary, .checkout-action { padding: clamp(22px, 3vw, 36px); border: 1px solid var(--border); border-radius: var(--radius); background: #fff; box-shadow: 0 10px 28px rgba(17,17,17,.04); }
.checkout-line { margin: 26px 0 16px; }
.checkout-line > div { display: flex; justify-content: space-between; gap: 14px; padding: 10px 0; border-bottom: 1px solid var(--border); }
.checkout-line dt { color: var(--muted); }
.checkout-line dd { margin: 0; text-align: right; }
.checkout-total { display: flex; justify-content: space-between; gap: 14px; padding: 18px 0; font-size: 1.1rem; }
.checkout-action .btn { width: 100%; }
.checkout-back { display: inline-block; margin-top: 20px; }
.payment-result { max-width: 720px; margin: 20px auto; padding: clamp(28px, 6vw, 56px); }
.payment-result h1 { margin-top: 18px; }
.payment-result-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 22px; }
.payment-confirmed { border-top: 3px solid var(--success); }
.narrow-container { max-width: 820px; }
.prose { max-width: 820px; }
.prose > h1 { margin: 18px 0 28px; }
.prose > h2 { margin: 34px 0 12px; font-size: 1.45rem; }
.prose > p { max-width: 740px; }
.prose-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.notice-panel { margin: 20px 0; padding: 18px 20px; background: #f7f7f5; border: 1px solid var(--border); border-radius: var(--radius-small); }
.faq-item { border-bottom: 1px solid var(--border); padding: 18px 0; }
.faq-item summary { cursor: pointer; font: 600 1.05rem var(--font-brand); }
.faq-item p { margin: 12px 0 0; }
.catalog-detail-header { margin: 28px 0 44px; max-width: 760px; }
.catalog-detail-header h1 { margin: 16px 0; }
.section-inner { margin-top: 36px; }
.catalog-count { color: var(--muted); font-size: .9rem; }
.material-context { min-height: 22px; margin-top: 7px; flex-wrap: wrap; }
.order-title { min-width: 0; }
.order-download { min-width: 150px; }
.order-download .form-message { font-size: .8rem; margin-top: 4px; }

@media (max-width: 760px) {
  .feature-rail { grid-template-columns: 1fr; }
  .logo-row[data-university-list] { grid-template-columns: 1fr 1fr; }
  .detail-layout, .checkout-layout { grid-template-columns: 1fr; }
  .detail-preview-paper { min-height: 300px; }
  .pdf-page-container { min-height: 440px; max-height: 75vh; padding: 14px 10px; }
  .pdf-preview-controls { justify-content: center; }
  .detail-meta { grid-template-columns: 1fr 1fr; }
  .checkout-action { order: -1; }
  .purchase-panel { position: static; }
}
@media (max-width: 480px) {
  .logo-row[data-university-list], .detail-meta { grid-template-columns: 1fr; }
  .payment-result-actions { flex-direction: column; }
  .payment-result-actions .btn { width: 100%; }
}