:root{--primary-color:#4361ee;--secondary-color:#3a0ca3;--accent-color:#7209b7;--light-color:#f8f9fa;--dark-color:#212529;--gray-color:#6c757d;--success-color:#4cc9f0;--warning-color:#f72585;--sql-color:#e95420;--java-color:#007396;--border-radius:12px;--box-shadow:0 8px 24px rgba(0,0,0,0.1);--transition:all 0.3s ease}*{margin:0;padding:0;box-sizing:border-box;font-family:'Segoe UI','Microsoft YaHei',sans-serif}body{background-color:#f0f2f5;color:var(--dark-color);line-height:1.6}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}header{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:white;padding:20px 0;box-shadow:0 4px 12px rgba(0,0,0,0.1);position:sticky;top:0;z-index:100}.header-content{display:flex;justify-content:space-between;align-items:center}.logo{display:flex;align-items:center;gap:15px}.logo i{font-size:2.5rem}.logo h1{font-size:1.8rem;font-weight:700}.logo span{color:var(--success-color)}nav ul{display:flex;list-style:none;gap:25px}nav a{color:white;text-decoration:none;font-weight:600;font-size:1.1rem;padding:8px 12px;border-radius:6px;transition:var(--transition)}nav a:hover,nav a.active{background-color:rgba(255,255,255,0.2)}.mobile-menu-btn{display:none;font-size:1.5rem;background:none;border:none;color:white;cursor:pointer}main{padding:40px 0}.tool-section{display:none;animation:fadeIn 0.5s ease}.tool-section.active{display:block}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.section-title{font-size:1.8rem;margin-bottom:25px;color:var(--secondary-color);display:flex;align-items:center;gap:10px}.section-title i{color:var(--accent-color)}.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:25px;margin-bottom:40px}.tool-card{background:white;border-radius:var(--border-radius);padding:25px;box-shadow:var(--box-shadow);transition:var(--transition);cursor:pointer;border:2px solid transparent}.tool-card:hover{transform:translateY(-5px);border-color:var(--primary-color)}.tool-card i{font-size:2.5rem;color:var(--primary-color);margin-bottom:15px}.tool-card h3{font-size:1.4rem;margin-bottom:10px;color:var(--dark-color)}.tool-card p{color:var(--gray-color);margin-bottom:20px}.use-tool-btn{background-color:var(--primary-color);color:white;border:none;padding:10px 20px;border-radius:6px;font-weight:600;cursor:pointer;transition:var(--transition);width:100%}.use-tool-btn:hover{background-color:var(--secondary-color)}.tool-detail{background:white;border-radius:var(--border-radius);padding:30px;box-shadow:var(--box-shadow);margin-top:30px}.tool-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:25px;padding-bottom:15px;border-bottom:2px solid #f0f2f5}.tool-header h2{font-size:1.6rem;color:var(--secondary-color)}.close-tool{background:none;border:none;font-size:1.5rem;color:var(--gray-color);cursor:pointer;transition:var(--transition)}.close-tool:hover{color:var(--warning-color)}.ip-query-container{display:flex;flex-direction:column;gap:20px}.ip-input-section{background:#f8f9fa;border-radius:var(--border-radius);padding:20px}.ip-input-group{display:flex;gap:10px;flex-wrap:wrap;margin-top:15px}.ip-input{flex:1;min-width:250px;padding:12px 15px;border:2px solid #e0e0e0;border-radius:6px;font-size:1rem;transition:var(--transition)}.ip-input:focus{outline:none;border-color:var(--primary-color)}.action-btn{padding:12px 24px;border-radius:6px;border:none;font-weight:600;cursor:pointer;transition:var(--transition);display:flex;align-items:center;gap:8px}.btn-primary{background-color:var(--primary-color);color:white}.btn-primary:hover{background-color:var(--secondary-color)}.btn-secondary{background-color:#e9ecef;color:var(--dark-color)}.btn-secondary:hover{background-color:#dee2e6}.btn-warning{background-color:var(--warning-color);color:white}.btn-warning:hover{background-color:#d1146a}.btn-success{background-color:var(--success-color);color:white}.btn-success:hover{background-color:#2ab3d7}.query-results{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;margin-top:20px}.result-card{background:white;border-radius:var(--border-radius);padding:20px;box-shadow:0 4px 12px rgba(0,0,0,0.05);border-left:4px solid var(--primary-color)}.result-card h4{font-size:1.1rem;margin-bottom:15px;color:var(--secondary-color);display:flex;align-items:center;gap:8px}.result-card h4 i{color:var(--accent-color)}.result-item{margin-bottom:12px;padding-bottom:12px;border-bottom:1px solid #f0f0f0}.result-item:last-child{margin-bottom:0;padding-bottom:0;border-bottom:none}.result-label{font-weight:600;color:var(--gray-color);font-size:0.9rem;margin-bottom:4px}.result-value{font-size:1.1rem;color:var(--dark-color);word-break:break-all}.result-value.country{display:flex;align-items:center;gap:8px}.flag-icon{width:24px;height:16px;border-radius:2px;box-shadow:0 1px 3px rgba(0,0,0,0.2)}.ip-overview{background:linear-gradient(135deg,var(--primary-color),var(--accent-color));color:white;border-radius:var(--border-radius);padding:25px;margin-top:20px}.ip-overview h3{font-size:1.4rem;margin-bottom:15px;display:flex;align-items:center;gap:10px}.ip-overview-content{display:flex;flex-wrap:wrap;gap:20px;align-items:center}.ip-display{font-size:1.8rem;font-weight:700;font-family:'Consolas',monospace}.ip-type{background:rgba(255,255,255,0.2);padding:5px 12px;border-radius:20px;font-size:0.9rem;font-weight:600}.map-container{height:300px;border-radius:var(--border-radius);overflow:hidden;margin-top:20px;background:#e9ecef;display:flex;align-items:center;justify-content:center;position:relative}.map-placeholder{text-align:center;color:var(--gray-color)}.map-placeholder i{font-size:4rem;margin-bottom:15px;color:#adb5bd}.history-section{margin-top:30px}.history-list{display:flex;flex-direction:column;gap:10px;margin-top:15px}.history-item{background:#f8f9fa;border-radius:8px;padding:12px 15px;display:flex;justify-content:space-between;align-items:center;transition:var(--transition)}.history-item:hover{background:#e9ecef}.history-ip{font-family:'Consolas',monospace;font-weight:600}.history-location{color:var(--gray-color);font-size:0.9rem}.history-time{color:var(--gray-color);font-size:0.85rem}.history-actions{display:flex;gap:8px}.history-btn{background:none;border:none;color:var(--gray-color);cursor:pointer;font-size:0.9rem;padding:4px 8px;border-radius:4px;transition:var(--transition)}.history-btn:hover{color:var(--primary-color);background:rgba(67,97,238,0.1)}.stats{display:flex;gap:15px;flex-wrap:wrap;margin-top:20px}.stat-box{background:#f8f9fa;padding:15px;border-radius:8px;flex:1;min-width:150px;text-align:center}.stat-value{font-size:1.8rem;font-weight:700;color:var(--primary-color)}.stat-label{color:var(--gray-color);font-size:0.9rem;margin-top:5px}.error-message{background-color:#ffeaea;border-left:4px solid #ff6b6b;padding:15px;border-radius:6px;margin-top:20px;display:none}.error-message.show{display:block;animation:fadeIn 0.3s ease}.error-title{color:#d63031;font-weight:600;margin-bottom:8px;display:flex;align-items:center;gap:8px}.error-content{color:#636e72;font-family:'Consolas',monospace;font-size:0.9rem;white-space:pre-wrap;word-break:break-all}footer{background-color:var(--dark-color);color:white;padding:40px 0;margin-top:60px}.footer-content{display:flex;flex-wrap:wrap;justify-content:space-between;gap:40px}.footer-section{flex:1;min-width:250px}.footer-section h3{font-size:1.3rem;margin-bottom:20px;color:var(--success-color)}.footer-links{list-style:none}.footer-links li{margin-bottom:10px}.footer-links a{color:#ddd;text-decoration:none;transition:var(--transition)}.footer-links a:hover{color:var(--success-color)}.copyright{text-align:center;margin-top:40px;padding-top:20px;border-top:1px solid #444;color:#aaa;font-size:0.9rem}@media (max-width:768px){.header-content{flex-direction:column;gap:20px}nav ul{flex-direction:column;gap:10px;text-align:center}.mobile-menu-btn{display:block;position:absolute;top:25px;right:20px}.mobile-menu{display:none;width:100%;margin-top:15px}.mobile-menu.show{display:block}.ip-input-group{flex-direction:column}.ip-input{min-width:100%}.query-results{grid-template-columns:1fr}.ip-overview-content{flex-direction:column;align-items:flex-start;gap:10px}.action-btn{width:100%;justify-content:center}}.ip-status{display:flex;align-items:center;gap:8px;font-size:0.9rem;margin-top:10px}.ip-status.online{color:#38b000}.ip-status.offline{color:#e63946}.ip-status.unknown{color:var(--gray-color)}.loading{display:none;text-align:center;padding:20px;color:var(--gray-color)}.loading.show{display:block}.loading-spinner{border:4px solid #f3f3f3;border-top:4px solid var(--primary-color);border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite;margin:0 auto 15px}@keyframes spin{0%{transform:rotate(0deg)}100%{transform:rotate(360deg)}}