.hk21-catalog { clear: both; padding: 24px 0; scroll-margin-top: 90px; }
.hk21-catalog > h2 { margin: 0 0 14px; }
.hk21-catalog > .desc { margin-bottom: 22px; color: #64748b; line-height: 1.8; }
.hk21-catalog-tabs { display: flex; flex-wrap: wrap; gap: 8px; padding-bottom: 12px; }
.hk21-catalog-tabs > li { float: none; }
.hk21-catalog-tabs button { border: 1px solid #dce6f4; border-radius: 5px; background: #fff; padding: 10px 15px; color: #334155; cursor: pointer; font: inherit; }
.hk21-catalog-tabs .active button, .hk21-catalog-tabs button:hover { border-color: #337dff; color: #1764df; background: #f0f6ff; }
.hk21-catalog-tabs button:focus-visible { outline: 2px solid #1764df; outline-offset: 3px; }
.hk21-catalog-heading { display: flex; align-items: center; justify-content: space-between; gap: 15px; margin: 22px 0 18px; }
.hk21-catalog-heading h3 { margin: 0; font-size: 19px; }
.hk21-catalog-heading a { color: #1764df; }
.hk21-catalog-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.hk21-catalog .hk21-product-card { display: flex; flex-direction: column; min-width: 0; height: auto; padding: 22px; border: 1px solid #e2e8f0; border-radius: 8px; background: #fff; }
.hk21-product-card h3 { margin: 12px 0 18px; font-size: 17px; line-height: 1.5; overflow-wrap: anywhere; }
.hk21-product-group { color: #64748b; line-height: 1.6; }
.hk21-product-specs { flex: 1; margin: 0 0 20px; padding: 0; list-style: none; color: #475569; }
.hk21-product-specs li { margin: 7px 0; line-height: 1.65; overflow-wrap: anywhere; }
.hk21-product-price { margin-bottom: 15px; font-size: 25px; font-weight: 600; color: #ef5b36; }
.hk21-product-price small { font-size: 12px; font-weight: 400; color: #64748b; }
.hk21-product-bottom .btn { width: 100%; white-space: normal; }
.hk21-catalog-state { padding: 30px 20px; background: #f5f8fc; border: 1px solid #e2e8f0; border-radius: 8px; color: #475569; line-height: 1.8; }
.hk21-catalog-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 18px 0 0; }
#main-body.hk21-catalog { width: min(1200px, calc(100% - 32px)); margin: 28px auto; }
@media (max-width: 1100px) { .hk21-catalog-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) {
  .hk21-catalog-grid { grid-template-columns: 1fr; }
  .hk21-catalog-heading { align-items: flex-start; flex-direction: column; }
  .hk21-catalog-tabs { gap: 6px; }
  .hk21-catalog-tabs button { padding: 9px 11px; font-size: 13px; }
}