.bt4{max-width:1200px;margin:30px auto;padding:10px 18px}.bt4-head{text-align:center;margin-bottom:25px}.bt4-head span{font-size:11px;font-weight:900;letter-spacing:2px;opacity:.6}.bt4-head h1,.bt4-head h2{font-size:34px}.bt4-picker,.bt4-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.bt4-picker>div,.bt4-card{border:1px solid #e2e6e9;border-radius:14px;padding:15px;background:#fff}.bt4-picker label{display:block;font-weight:800;margin-bottom:8px}.bt4-select{width:100%;padding:12px;border:1px solid #ccd3d9;border-radius:8px}.bt4-add{margin-top:8px;padding:8px;border:0;border-radius:7px;cursor:pointer}.bt4-main{display:block;margin:18px auto;padding:14px 25px;background:#111827;color:#fff;border:0;border-radius:9px;font-weight:900;cursor:pointer}.bt4-card img,.bt4-noimg{width:100%;height:160px;object-fit:contain;background:#f5f6f7}.bt4-noimg{display:flex;align-items:center;justify-content:center;font-weight:900;color:#999}.bt4-tablewrap{overflow:auto;margin-top:18px;border:1px solid #e1e5e9;border-radius:14px}.bt4-table{width:100%;min-width:650px;border-collapse:collapse}.bt4-table th,.bt4-table td{padding:12px;border-bottom:1px solid #eee;text-align:center}.bt4-table th:first-child,.bt4-table td:first-child{text-align:left}.bt4-table thead th{background:#f4f6f8}.bt4-price th,.bt4-price td{font-weight:900}.bt4-empty{text-align:center;padding:40px;border:1px dashed #ccd3d9;border-radius:14px}@media(max-width:800px){.bt4-picker,.bt4-cards{grid-template-columns:1fr}}