.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)}.options-section{background:var(--gray-50);border-radius:20px;padding:20px;margin-bottom:24px}.options-section h3{font-size:1rem;margin-bottom:16px;color:var(--gray-700);display:flex;align-items:center;gap:8px}.options-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:20px}.option-group label{display:block;font-size:0.8rem;font-weight:600;margin-bottom:10px;color:var(--gray-700)}.version-buttons,.type-buttons{display:flex;gap:8px;flex-wrap:wrap}.version-btn,.type-btn{background:white;border:1px solid var(--gray-300);padding:6px 16px;border-radius:30px;font-size:0.8rem;cursor:pointer;transition:all 0.2s}.version-btn.active,.type-btn.active{background:var(--primary-color);border-color:var(--primary-color);color:white}.count-control{display:flex;align-items:center;gap:8px}.count-input{width:80px;padding:8px 12px;border:1px solid var(--gray-300);border-radius:12px;text-align:center;font-size:1rem}.count-unit{color:var(--gray-500);font-size:0.9rem}.subnet-control{display:flex;flex-direction:column;gap:4px}.subnet-input{padding:8px 12px;border:1px solid var(--gray-300);border-radius:12px;font-family:monospace;font-size:0.9rem}.subnet-hint{font-size:0.65rem;color:var(--gray-400)}.action-section{display:flex;gap:16px;justify-content:center;margin-bottom:24px;flex-wrap:wrap}.gen-btn{padding:12px 32px;font-size:1rem}.result-section{background:white;border-radius:20px;border:1px solid var(--gray-200);overflow:hidden;margin-bottom:24px}.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-actions{display:flex;gap:8px}.ip-list{min-height:150px;max-height:400px;overflow-y:auto;padding:16px;background:#1a1a2e}.ip-list .placeholder{text-align:center;color:var(--gray-500);padding:40px}.ip-list .placeholder i{font-size:48px;color:var(--gray-400);margin-bottom:12px}.ip-item{display:flex;justify-content:space-between;align-items:center;padding:6px 12px;border-bottom:1px solid #2d2d44;font-family:'Fira Code',monospace;font-size:0.85rem}.ip-item:last-child{border-bottom:none}.ip-address{color:#4ade80}.ip-type-badge{font-size:0.6rem;padding:2px 10px;border-radius:20px}.ip-type-badge.public{background:#10b981;color:white}.ip-type-badge.private{background:#f59e0b;color:white}.ip-type-badge.loopback{background:#8b5cf6;color:white}.ip-copy-btn{background:transparent;border:none;color:var(--gray-500);cursor:pointer;padding:4px 8px;border-radius:4px}.ip-copy-btn:hover{background:#2d2d44;color:#4ade80}.result-footer{padding:12px 20px;background:var(--gray-50);border-top:1px solid var(--gray-200);display:flex;gap:24px;font-size:0.7rem;color:var(--gray-500)}.ip-detail{padding:16px;background:var(--gray-50);border-radius:16px;margin-top:16px}.ip-detail-grid{display:grid;grid-template-columns:repeat(auto-fill, minmax(250px, 1fr));gap:12px}.ip-detail-item{display:flex;justify-content:space-between;padding:8px 12px;background:white;border-radius:8px;border:1px solid var(--gray-200);font-family:monospace;font-size:0.8rem}.ip-detail-item .label{color:var(--gray-500)}.ip-detail-item .value{font-weight:600}.quick-examples{margin-bottom:24px}.example-buttons{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}.example-btn{background:var(--gray-100);border:1px solid var(--gray-300);padding:8px 20px;border-radius:40px;cursor:pointer;font-size:0.85rem;transition:all 0.2s}.example-btn:hover{background:var(--primary-color);border-color:var(--primary-color);color:white}.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}@media (max-width:900px){.stats-grid{grid-template-columns:repeat(2, 1fr)}.options-grid{grid-template-columns:1fr 1fr}.knowledge-grid{grid-template-columns:repeat(2, 1fr)}}@media (max-width:600px){.stats-grid{grid-template-columns:1fr}.options-grid{grid-template-columns:1fr}.action-section{flex-direction:column;align-items:center}.result-header{flex-direction:column;align-items:flex-start;gap:8px}.knowledge-grid{grid-template-columns:1fr}}