.stats-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:20px;margin-bottom:30px}.stat-card{background:white;border-radius:20px;padding:20px;display:flex;align-items:center;gap:16px;border:1px solid var(--gray-200);transition:all 0.3s}.stat-card:hover{transform:translateY(-4px);box-shadow:0 10px 30px rgba(0,0,0,0.1)}.stat-icon{width:50px;height:50px;background:linear-gradient(135deg, #e0e7ff, #f0f4ff);border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:24px;color:var(--primary-color)}.stat-value{font-size:1.6rem;font-weight:700;color:var(--gray-800)}.stat-label{font-size:0.75rem;color:var(--gray-500)}.room-section,.deduction-section,.paint-section{margin-bottom:24px}.room-section h3,.deduction-section h3,.paint-section h3{font-size:1rem;margin-bottom:16px;color:var(--gray-700);display:flex;align-items:center;gap:8px}.room-grid,.deduction-grid,.paint-grid{background:var(--gray-50);border-radius:20px;padding:20px}.room-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:20px}.deduction-grid{display:grid;grid-template-columns:repeat(2, 1fr);gap:20px}.paint-grid{display:grid;grid-template-columns:repeat(3, 1fr);gap:20px}.input-group,.param-group{display:flex;flex-direction:column;gap:6px}.input-group label,.param-group label{font-size:0.85rem;font-weight:500;color:var(--gray-700)}.calc-input,.param-input{padding:10px 14px;border:1px solid var(--gray-300);border-radius:12px;font-size:0.95rem}.calc-input:focus,.param-input:focus{outline:none;border-color:var(--primary-color)}.param-select{padding:10px 14px;border:1px solid var(--gray-300);border-radius:12px;background:white}.input-hint{font-size:0.65rem;color:var(--gray-400)}.calc-section{display:flex;gap:12px;justify-content:center;margin:24px 0;flex-wrap:wrap}.calc-btn{padding:12px 32px;font-size:1rem}.room-list-section{margin-bottom:24px}.room-list-section h3{font-size:1rem;margin-bottom:12px;color:var(--gray-700)}.room-list{display:flex;flex-wrap:wrap;gap:12px}.room-tag{background:var(--gray-100);padding:8px 16px;border-radius:40px;display:flex;align-items:center;gap:8px;font-size:0.85rem}.room-tag .remove-room{background:transparent;border:none;color:var(--gray-400);cursor:pointer}.room-tag .remove-room:hover{color:#ef4444}.result-section{background:white;border-radius:20px;border:1px solid var(--gray-200);overflow:hidden;margin-bottom:24px;animation:fadeIn 0.3s ease}.result-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;background:linear-gradient(135deg, var(--gray-50), #fafafa);border-bottom:1px solid var(--gray-200)}.result-header h3{font-size:1rem;display:flex;align-items:center;gap:8px}.result-summary{display:grid;grid-template-columns:repeat(4, 1fr);gap:16px;padding:20px}.result-card{text-align:center;padding:16px;background:var(--gray-50);border-radius:16px}.result-card.primary{background:linear-gradient(135deg, #1a1a2e, #16213e);color:white}.result-card.primary .result-label{color:var(--gray-400)}.result-card.primary .result-value{color:#4ade80;font-size:1.8rem}.result-label{font-size:0.7rem;color:var(--gray-500);margin-bottom:6px}.result-value{font-size:1.2rem;font-weight:700;color:var(--gray-800)}.result-sub{font-size:0.7rem;color:var(--gray-400);margin-top:4px}.room-detail{padding:16px 20px;border-top:1px solid var(--gray-200)}.room-detail h4{font-size:0.85rem;margin-bottom:12px;color:var(--gray-700)}.room-detail-table{overflow-x:auto}.room-detail-table table{width:100%;border-collapse:collapse;font-size:0.85rem}.room-detail-table th,.room-detail-table td{padding:10px 12px;text-align:center;border-bottom:1px solid var(--gray-200)}.room-detail-table th{background:var(--gray-50);font-weight:600}.purchase-tips{padding:16px 20px;border-top:1px solid var(--gray-200)}.purchase-tips h4{font-size:0.85rem;margin-bottom:12px;color:var(--gray-700)}.tips-content{background:#fef3c7;border-radius:12px;padding:16px}.tips-content ul{list-style:none;padding:0}.tips-content li{padding:4px 0;font-size:0.85rem;color:#92400e}.knowledge-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:20px;margin-top:20px}.knowledge-card{background:var(--gray-50);border-radius:16px;padding:20px;text-align:center}.knowledge-card i{font-size:28px;color:var(--primary-color);margin-bottom:12px}.knowledge-card h4{font-size:0.85rem;margin-bottom:8px}.knowledge-card p{font-size:0.75rem;color:var(--gray-500);line-height:1.5}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (max-width:900px){.room-grid{grid-template-columns:repeat(2, 1fr)}.paint-grid{grid-template-columns:repeat(2, 1fr)}.result-summary{grid-template-columns:repeat(2, 1fr)}.knowledge-grid{grid-template-columns:repeat(2, 1fr)}}@media (max-width:600px){.room-grid{grid-template-columns:1fr}.deduction-grid{grid-template-columns:1fr}.paint-grid{grid-template-columns:1fr}.result-summary{grid-template-columns:1fr}.calc-section{flex-direction:column;align-items:stretch}.knowledge-grid{grid-template-columns:1fr}}