.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)}.mode-tabs{display:flex;gap:12px;margin-bottom:24px;border-bottom:1px solid var(--gray-200);padding-bottom:12px}.mode-btn{background:transparent;border:none;padding:10px 24px;border-radius:40px;cursor:pointer;font-size:0.9rem;transition:all 0.2s;color:var(--gray-600)}.mode-btn i{margin-right:8px}.mode-btn.active{background:var(--primary-color);color:white}.calc-section{background:var(--gray-50);border-radius:20px;padding:24px;margin-bottom:24px}.input-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:16px;margin-bottom:16px}.input-group label{display:block;font-size:0.75rem;color:var(--gray-500);margin-bottom:4px}.calc-input{width:100%;padding:10px 14px;border:1px solid var(--gray-300);border-radius:12px;font-size:1rem}.calc-input:focus{outline:none;border-color:var(--primary-color)}.calc-select{width:100%;padding:10px 14px;border:1px solid var(--gray-300);border-radius:12px;background:white;font-size:0.95rem}.options-row{display:grid;grid-template-columns:repeat(3, 1fr);gap:16px;margin-bottom:16px}.option-group label{display:block;font-size:0.75rem;color:var(--gray-500);margin-bottom:4px}.calc-btn{width:100%;padding:12px;font-size:1rem}.result-section{background:white;border-radius:20px;border:1px solid var(--gray-200);overflow:hidden;animation:fadeIn 0.3s ease;margin-bottom:24px}.result-grid{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)}.result-card.primary .result-label{color:var(--gray-400)}.result-card.primary .result-value{color:#4ade80}.result-card.primary .result-sub{color:var(--gray-400)}.result-label{font-size:0.7rem;color:var(--gray-500);margin-bottom:4px}.result-value{font-size:1.6rem;font-weight:700;color:var(--gray-800)}.result-sub{font-size:0.7rem;color:var(--gray-400)}.result-detail{padding:16px 20px;border-top:1px solid var(--gray-200)}.detail-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:12px}.detail-item{font-size:0.8rem}.detail-item span{color:var(--gray-500);margin-right:8px}.result-actions{padding:12px 20px;border-top:1px solid var(--gray-200);display:flex;gap:12px;justify-content:center}.advanced-grid{grid-template-columns:repeat(3, 1fr)}.advanced-options{grid-template-columns:repeat(3, 1fr)}.advanced-result{grid-template-columns:repeat(3, 1fr)}.advanced-result .total{background:linear-gradient(135deg, #1a1a2e, #16213e)}.advanced-result .total .result-label{color:var(--gray-400)}.advanced-result .total .result-value{color:#fbbf24}.advanced-result .total .result-sub{color:var(--gray-400)}.room-list{margin-bottom:16px}.room-item{display:grid;grid-template-columns:2fr 2fr 1fr;gap:12px;padding:12px;background:white;border-radius:12px;margin-bottom:8px;border:1px solid var(--gray-200)}.room-item label{display:block;font-size:0.7rem;color:var(--gray-500)}.room-item input{width:100%;padding:6px 10px;border:1px solid var(--gray-300);border-radius:8px}.room-controls{display:flex;gap:12px;margin-bottom:16px}.multi-options{display:grid;grid-template-columns:repeat(4, 1fr);gap:16px;margin-bottom:16px}.multi-table{padding:16px 20px}.multi-table table{width:100%;border-collapse:collapse;font-size:0.85rem}.multi-table th,.multi-table td{padding:10px 12px;text-align:center;border-bottom:1px solid var(--gray-200)}.multi-table th{background:var(--gray-50);font-weight:600}.total-grid{grid-template-columns:repeat(3, 1fr)}.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){.input-grid{grid-template-columns:repeat(2, 1fr)}.options-row{grid-template-columns:1fr}.result-grid{grid-template-columns:repeat(2, 1fr)}.advanced-grid{grid-template-columns:repeat(2, 1fr)}.advanced-options{grid-template-columns:1fr}.advanced-result{grid-template-columns:repeat(2, 1fr)}.multi-options{grid-template-columns:repeat(2, 1fr)}.knowledge-grid{grid-template-columns:repeat(2, 1fr)}}@media (max-width:600px){.stats-grid{grid-template-columns:1fr}.input-grid{grid-template-columns:1fr}.result-grid{grid-template-columns:1fr}.advanced-result{grid-template-columns:1fr}.multi-options{grid-template-columns:1fr}.total-grid{grid-template-columns:1fr}.knowledge-grid{grid-template-columns:1fr}}