: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;--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;display:none}.tool-detail.active{display:block}.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)}.palette-container{display:flex;flex-direction:column;gap:20px}.palette-row{display:flex;flex-wrap:wrap;gap:20px}.palette-col{flex:1;min-width:300px}.palette-col h3{margin-bottom:10px;color:var(--dark-color);font-size:1.2rem;display:flex;align-items:center;gap:8px}.color-picker-container{background:#f8f9fa;border-radius:var(--border-radius);padding:20px;margin-bottom:20px}.color-display{width:100%;height:120px;border-radius:var(--border-radius);margin-bottom:20px;border:2px solid #e0e0e0;position:relative;overflow:hidden}.color-value-display{position:absolute;bottom:0;left:0;right:0;background:rgba(0,0,0,0.7);color:white;padding:12px;font-family:'Consolas','Monaco','Courier New',monospace;font-weight:600;display:flex;justify-content:space-between;align-items:center}.color-preview{width:100%;height:100%}.color-inputs{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:15px;margin-top:20px}.input-group{margin-bottom:15px}.input-group label{display:block;margin-bottom:6px;font-weight:600;color:var(--dark-color);font-size:0.9rem}.input-group input{width:100%;padding:10px 12px;border:2px solid #e0e0e0;border-radius:6px;font-size:1rem;font-family:'Consolas','Monaco','Courier New',monospace;transition:var(--transition)}.input-group input:focus{outline:none;border-color:var(--primary-color)}.slider-container{margin-bottom:15px}.slider-group{display:flex;align-items:center;gap:10px}.slider-group label{min-width:40px;font-weight:600;font-size:0.9rem}.slider-group input[type="range"]{flex:1;height:8px;-webkit-appearance:none;background:#e0e0e0;border-radius:4px;outline:none}.slider-group input[type="range"]::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;border-radius:50%;background:var(--primary-color);cursor:pointer;border:2px solid white;box-shadow:0 2px 5px rgba(0,0,0,0.2)}.slider-value{min-width:40px;text-align:right;font-weight:600;font-family:'Consolas','Monaco','Courier New',monospace}.palette-display{background:#f8f9fa;border-radius:var(--border-radius);padding:20px;margin-top:20px}.palette-types{display:flex;gap:10px;margin-bottom:20px;flex-wrap:wrap}.palette-type-btn{padding:8px 16px;background:white;border:1px solid #ddd;border-radius:6px;cursor:pointer;transition:var(--transition);font-size:0.9rem;font-weight:600}.palette-type-btn.active{background-color:var(--primary-color);color:white;border-color:var(--primary-color)}.palette-type-btn:hover{background-color:#f0f0f0}.palette-type-btn.active:hover{background-color:var(--secondary-color)}.palette-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:15px;margin-top:15px}.palette-color{border-radius:8px;overflow:hidden;box-shadow:0 4px 8px rgba(0,0,0,0.1);transition:var(--transition);cursor:pointer}.palette-color:hover{transform:translateY(-5px);box-shadow:0 8px 16px rgba(0,0,0,0.15)}.color-block{height:100px;width:100%}.color-info{background:white;padding:12px;text-align:center}.color-hex{font-family:'Consolas','Monaco','Courier New',monospace;font-weight:600;margin-bottom:4px}.color-rgb{font-size:0.8rem;color:var(--gray-color)}.favorites-container{background:#f8f9fa;border-radius:var(--border-radius);padding:20px;margin-top:20px}.favorites-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(80px,1fr));gap:10px;margin-top:15px}.favorite-color{height:60px;border-radius:8px;cursor:pointer;position:relative;transition:var(--transition);box-shadow:0 2px 5px rgba(0,0,0,0.1)}.favorite-color:hover{transform:scale(1.05);box-shadow:0 4px 10px rgba(0,0,0,0.15)}.remove-favorite{position:absolute;top:-5px;right:-5px;width:20px;height:20px;background:#dc3545;color:white;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:0.7rem;opacity:0;transition:var(--transition)}.favorite-color:hover .remove-favorite{opacity:1}.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-success{background-color:var(--success-color);color:white}.btn-success:hover{background-color:#3ab8d9}.btn-warning{background-color:var(--warning-color);color:white}.btn-warning:hover{background-color:#d1146a}.btn-secondary{background-color:#e9ecef;color:var(--dark-color)}.btn-secondary:hover{background-color:#dee2e6}.conversion-container{background:#f8f9fa;border-radius:var(--border-radius);padding:20px;margin-top:20px}.format-tabs{display:flex;gap:10px;margin-bottom:20px;flex-wrap:wrap}.format-tab{padding:8px 16px;background:white;border:1px solid #ddd;border-radius:6px;cursor:pointer;transition:var(--transition);font-size:0.9rem;font-weight:600}.format-tab.active{background-color:var(--primary-color);color:white;border-color:var(--primary-color)}.format-content{display:none}.format-content.active{display:block}.conversion-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:15px}.contrast-container{background:#f8f9fa;border-radius:var(--border-radius);padding:20px;margin-top:20px}.contrast-preview{display:flex;height:120px;border-radius:var(--border-radius);overflow:hidden;margin-bottom:20px}.contrast-color{flex:1;display:flex;align-items:center;justify-content:center;flex-direction:column;color:white;font-weight:600;text-shadow:0 1px 2px rgba(0,0,0,0.5)}.contrast-color.dark{color:#333;text-shadow:0 1px 2px rgba(255,255,255,0.5)}.contrast-result{background:white;border-radius:var(--border-radius);padding:20px;margin-top:20px;text-align:center}.contrast-ratio{font-size:2.5rem;font-weight:700;color:var(--primary-color);margin-bottom:10px}.contrast-rating{font-size:1.2rem;font-weight:600;padding:8px 16px;border-radius:20px;display:inline-block}.rating-aaa{background-color:#28a745;color:white}.rating-aa{background-color:#17a2b8;color:white}.rating-a{background-color:#ffc107;color:#212529}.rating-fail{background-color:#dc3545;color:white}.color-library{margin-top:30px}.library-tabs{display:flex;gap:10px;margin-bottom:20px;flex-wrap:wrap}.library-tab{padding:8px 16px;background:white;border:1px solid #ddd;border-radius:6px;cursor:pointer;transition:var(--transition);font-size:0.9rem;font-weight:600}.library-tab.active{background-color:var(--primary-color);color:white;border-color:var(--primary-color)}.library-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:15px}.library-color{height:80px;border-radius:8px;cursor:pointer;transition:var(--transition);box-shadow:0 2px 5px rgba(0,0,0,0.1);position:relative;overflow:hidden}.library-color:hover{transform:scale(1.05);box-shadow:0 4px 10px rgba(0,0,0,0.15)}.library-color-name{position:absolute;bottom:0;left:0;right:0;background:rgba(0,0,0,0.7);color:white;padding:5px;font-size:0.7rem;text-align:center}.info-container{background:#e7f4ff;border-radius:var(--border-radius);padding:20px;margin-top:30px;border-left:4px solid var(--primary-color)}.info-container h3{margin-bottom:10px;color:var(--secondary-color);font-size:1.2rem}.info-content{font-size:0.95rem;line-height:1.7}.info-content ul{margin-left:20px;margin-top:10px}.info-content li{margin-bottom:5px}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}.palette-row{flex-direction:column}.palette-col{min-width:100%}.action-buttons{flex-direction:column}.action-btn{width:100%;justify-content:center}.color-inputs{grid-template-columns:1fr}.palette-grid{grid-template-columns:repeat(auto-fill,minmax(100px,1fr))}.library-grid{grid-template-columns:repeat(auto-fill,minmax(80px,1fr))}}