: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)}.search-section{background:white;border-radius:var(--border-radius);padding:25px;box-shadow:var(--box-shadow);margin-bottom:40px}.search-container{display:flex;gap:15px;margin-bottom:20px}.search-input{flex:1;padding:15px;border:2px solid #e0e0e0;border-radius:var(--border-radius);font-size:1rem;line-height:1.5;transition:var(--transition);border-left:4px solid var(--regex-color)}.search-input:focus{outline:none;border-color:var(--primary-color)}.search-btn{padding:0 30px;background-color:var(--primary-color);color:white;border:none;border-radius:var(--border-radius);font-weight:600;cursor:pointer;transition:var(--transition);display:flex;align-items:center;gap:8px}.search-btn:hover{background-color:var(--secondary-color)}.search-tags{display:flex;flex-wrap:wrap;gap:10px}.search-tag{padding:8px 15px;background-color:#f0f2f5;border-radius:20px;font-size:0.9rem;cursor:pointer;transition:var(--transition)}.search-tag:hover{background-color:var(--primary-color);color:white}.cheatsheet-container{display:grid;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:25px;margin-bottom:40px}.cheatsheet-card{background:white;border-radius:var(--border-radius);padding:25px;box-shadow:var(--box-shadow);transition:var(--transition);border:2px solid transparent}.cheatsheet-card:hover{transform:translateY(-5px);border-color:var(--primary-color)}.card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px;padding-bottom:15px;border-bottom:2px solid #f0f2f5}.card-title{font-size:1.3rem;font-weight:600;color:var(--secondary-color);display:flex;align-items:center;gap:8px}.card-icon{width:40px;height:40px;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));border-radius:50%;display:flex;align-items:center;justify-content:center;color:white}.syntax-table{width:100%;border-collapse:collapse;font-size:0.9rem}.syntax-table th,.syntax-table td{padding:12px;text-align:left;border-bottom:1px solid #eee}.syntax-table th{background-color:#f8f9fa;font-weight:600;color:var(--dark-color);white-space:nowrap}.syntax-table tr:hover{background-color:#f9f9f9}.regex-symbol{font-family:'Consolas','Monaco','Courier New',monospace;color:var(--regex-color);font-weight:600;background-color:#f8f9fa;padding:2px 6px;border-radius:4px;display:inline-block;margin-right:5px}.regex-desc{color:var(--dark-color)}.examples-section{background:white;border-radius:var(--border-radius);padding:30px;box-shadow:var(--box-shadow);margin-bottom:40px}.examples-tabs{display:flex;border-bottom:2px solid #f0f2f5;margin-bottom:25px;flex-wrap:wrap}.example-tab{padding:12px 20px;background:none;border:none;font-weight:600;color:var(--gray-color);cursor:pointer;transition:var(--transition);position:relative}.example-tab.active{color:var(--primary-color)}.example-tab.active::after{content:'';position:absolute;bottom:-2px;left:0;right:0;height:2px;background:var(--primary-color)}.example-content{display:none}.example-content.active{display:block;animation:fadeIn 0.5s ease}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.example-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}.example-item{background:#f8f9fa;border-radius:8px;padding:20px;transition:var(--transition)}.example-item:hover{transform:translateY(-3px);box-shadow:0 4px 12px rgba(0,0,0,0.1)}.example-title{font-weight:600;color:var(--secondary-color);margin-bottom:10px;display:flex;align-items:center;gap:8px}.example-pattern{background-color:white;padding:15px;border-radius:6px;margin-bottom:10px;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)}.example-description{color:var(--gray-color);font-size:0.9rem;margin-bottom:15px;line-height:1.5}.example-matches{margin-top:15px}.match-item{padding:8px;margin-bottom:5px;background-color:white;border-radius:4px;border-left:3px solid var(--success-color)}.no-match-item{padding:8px;margin-bottom:5px;background-color:white;border-radius:4px;border-left:3px solid var(--warning-color);opacity:0.7}.download-section{background:white;border-radius:var(--border-radius);padding:30px;box-shadow:var(--box-shadow);text-align:center}.download-buttons{display:flex;justify-content:center;gap:20px;margin-top:20px;flex-wrap:wrap}.download-btn{padding:15px 30px;border-radius:var(--border-radius);border:none;font-weight:600;cursor:pointer;transition:var(--transition);display:flex;align-items:center;gap:10px;min-width:200px;justify-content:center}.btn-pdf{background-color:#ff6b6b;color:white}.btn-pdf:hover{background-color:#ff5252}.btn-image{background-color:var(--success-color);color:white}.btn-image:hover{background-color:#3aa8c9}.btn-print{background-color:var(--primary-color);color:white}.btn-print:hover{background-color:var(--secondary-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}.search-container{flex-direction:column}.search-btn{width:100%;justify-content:center}.cheatsheet-container{grid-template-columns:1fr}.syntax-table{display:block;overflow-x:auto}.example-grid{grid-template-columns:1fr}.download-buttons{flex-direction:column}.download-btn{width:100%}}