: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;--regex-color:#0ca678;--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:1400px;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}.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)}.regex-tester{background:white;border-radius:var(--border-radius);padding:30px;box-shadow:var(--box-shadow);margin-bottom:40px}.tester-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:25px;padding-bottom:15px;border-bottom:2px solid #f0f2f5}.tester-header h2{font-size:1.6rem;color:var(--secondary-color)}.input-group{margin-bottom:20px}.input-group label{display:block;margin-bottom:8px;font-weight:600;color:var(--dark-color);display:flex;align-items:center;gap:8px}.input-group label i{color:var(--regex-color)}.input-with-button{display:flex;gap:10px}.regex-input{flex:1;padding:15px;border:2px solid #e0e0e0;border-radius:var(--border-radius);font-family:'Consolas','Monaco','Courier New',monospace;font-size:1rem;line-height:1.5;transition:var(--transition);border-left:4px solid var(--regex-color)}.regex-input:focus{outline:none;border-color:var(--primary-color)}.test-input{width:100%;height:150px;padding:15px;border:2px solid #e0e0e0;border-radius:var(--border-radius);font-family:'Consolas','Monaco','Courier New',monospace;font-size:1rem;line-height:1.5;resize:vertical;transition:var(--transition)}.test-input:focus{outline:none;border-color:var(--primary-color)}.action-buttons{display:flex;gap:15px;flex-wrap:wrap;margin-top:25px}.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-success{background-color:var(--success-color);color:white}.btn-success:hover{background-color:#3aa8c9}.btn-warning{background-color:var(--warning-color);color:white}.btn-warning:hover{background-color:#d1146a}.results-container{margin-top:30px;display:none}.results-container.show{display:block;animation:fadeIn 0.5s ease}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.results-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px}.results-title{font-weight:600;color:var(--secondary-color);display:flex;align-items:center;gap:8px}.match-count{background-color:var(--primary-color);color:white;padding:4px 12px;border-radius:20px;font-size:0.9rem;font-weight:600}.results-content{background-color:#f8f9fa;border-radius:var(--border-radius);padding:20px;max-height:300px;overflow-y:auto;font-family:'Consolas','Monaco','Courier New',monospace;font-size:0.95rem;line-height:1.5}.match-item{padding:8px 12px;margin-bottom:8px;background-color:white;border-radius:6px;border-left:4px solid var(--success-color)}.no-matches{color:var(--gray-color);text-align:center;padding:20px}.regex-library{margin-bottom:40px}.library-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:25px}.regex-card{background:white;border-radius:var(--border-radius);padding:25px;box-shadow:var(--box-shadow);transition:var(--transition);border:2px solid transparent}.regex-card:hover{transform:translateY(-5px);border-color:var(--primary-color)}.regex-card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px}.regex-card-title{font-size:1.2rem;font-weight:600;color:var(--secondary-color);display:flex;align-items:center;gap:8px}.regex-card-category{background-color:#e9ecef;color:var(--gray-color);padding:4px 10px;border-radius:20px;font-size:0.8rem;font-weight:600}.regex-pattern{background-color:#f8f9fa;padding:15px;border-radius:8px;margin-bottom:15px;font-family:'Consolas','Monaco','Courier New',monospace;font-size:0.9rem;line-height:1.5;word-break:break-all;border-left:4px solid var(--regex-color)}.regex-description{color:var(--gray-color);margin-bottom:15px;font-size:0.95rem;line-height:1.5}.regex-examples{background-color:#f8f9fa;padding:15px;border-radius:8px;font-family:'Consolas','Monaco','Courier New',monospace;font-size:0.85rem;line-height:1.5}.regex-example{margin-bottom:8px;padding:4px 0}.regex-example.match{color:var(--success-color)}.regex-example.no-match{color:var(--warning-color)}.regex-actions{display:flex;gap:10px;margin-top:15px}.regex-btn{padding:8px 15px;border-radius:6px;border:none;font-weight:600;cursor:pointer;transition:var(--transition);font-size:0.9rem;display:flex;align-items:center;gap:5px}.regex-reference{background:white;border-radius:var(--border-radius);padding:30px;box-shadow:var(--box-shadow);margin-bottom:40px}.reference-tabs{display:flex;border-bottom:2px solid #f0f2f5;margin-bottom:25px;flex-wrap:wrap}.reference-tab{padding:12px 20px;background:none;border:none;font-weight:600;color:var(--gray-color);cursor:pointer;transition:var(--transition);position:relative}.reference-tab.active{color:var(--primary-color)}.reference-tab.active::after{content:'';position:absolute;bottom:-2px;left:0;right:0;height:2px;background:var(--primary-color)}.reference-content{display:none}.reference-content.active{display:block;animation:fadeIn 0.5s ease}.reference-table{width:100%;border-collapse:collapse;font-size:0.95rem}.reference-table th,.reference-table td{padding:12px 15px;text-align:left;border-bottom:1px solid #eee}.reference-table th{background-color:#f8f9fa;font-weight:600;color:var(--dark-color);white-space:nowrap}.reference-table tr:hover{background-color:#f9f9f9}.regex-symbol{font-family:'Consolas','Monaco','Courier New',monospace;color:var(--regex-color);font-weight:600}.regex-desc{color:var(--dark-color)}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}.input-with-button{flex-direction:column}.action-buttons{flex-direction:column}.action-btn{width:100%;justify-content:center}.library-grid{grid-template-columns:1fr}.reference-tabs{flex-direction:column}.reference-table{display:block;overflow-x:auto}}