: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;--input-color:#e95420;--result-color:#10b981;--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)}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)}.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)}.tabs{display:flex;gap:10px;margin-bottom:25px;border-bottom:1px solid #eee;padding-bottom:10px}.tab-btn{padding:10px 25px;border:none;background:none;font-size:1rem;color:var(--gray-color);cursor:pointer;border-radius:6px;transition:var(--transition);font-weight:600}.tab-btn.active{background-color:var(--primary-color);color:white}.tab-content{display:none;animation:fadeIn 0.3s ease}.tab-content.active{display:block}@keyframes fadeIn{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;margin-bottom:25px;background:#f8f9fa;padding:20px;border-radius:8px}.form-group{display:flex;flex-direction:column}.form-group label{font-size:0.9rem;color:#666;margin-bottom:8px;font-weight:600}.form-control{padding:10px;border:1px solid #ddd;border-radius:6px;font-size:1rem;transition:var(--transition)}.form-control:focus{outline:none;border-color:var(--primary-color)}textarea.form-control{height:120px;font-family:'Consolas',monospace;resize:vertical}.checkbox-group{display:flex;gap:20px;margin-bottom:20px;align-items:center}.checkbox-item{display:flex;align-items:center;gap:8px;cursor:pointer}.checkbox-item input{width:18px;height:18px;cursor:pointer;accent-color:var(--primary-color)}.result-container{background:white;border:1px solid #e0e0e0;border-radius:var(--border-radius);padding:20px;min-height:150px}.result-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px;padding-bottom:10px;border-bottom:1px solid #eee}.result-header h3{font-size:1.1rem;color:var(--dark-color)}.numbers-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(80px,1fr));gap:15px;max-height:300px;overflow-y:auto;padding:5px}.number-card{background:linear-gradient(135deg,var(--light-color) 0%,#fff 100%);border:1px solid #ddd;border-radius:8px;padding:15px 5px;text-align:center;font-weight:700;font-size:1.1rem;color:var(--secondary-color);box-shadow:0 2px 5px rgba(0,0,0,0.05);transition:var(--transition);animation:popIn 0.4s cubic-bezier(0.175,0.885,0.32,1.275)}.number-card:hover{transform:scale(1.1);border-color:var(--primary-color);box-shadow:0 5px 15px rgba(0,0,0,0.1)}.list-result{list-style:none;max-height:250px;overflow-y:auto}.list-item{padding:10px 15px;border-bottom:1px solid #eee;display:flex;align-items:center;gap:10px;animation:slideIn 0.3s ease}.list-item:last-child{border-bottom:none}.list-badge{background:var(--primary-color);color:white;width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:0.8rem;flex-shrink:0}@keyframes popIn{from{transform:scale(0.5);opacity:0}to{transform:scale(1);opacity:1}}@keyframes slideIn{from{transform:translateX(-10px);opacity:0}to{transform:translateX(0);opacity:1}}.action-bar{display:flex;gap:15px;margin-top:20px;flex-wrap:wrap}.action-btn{padding:12px 30px;border-radius:6px;border:none;font-weight:600;cursor:pointer;transition:var(--transition);display:flex;align-items:center;gap:8px;font-size:1rem}.btn-primary{background-color:var(--primary-color);color:white}.btn-primary:hover{background-color:var(--secondary-color);box-shadow:0 4px 12px rgba(67,97,238,0.3)}.btn-secondary{background-color:#e9ecef;color:var(--dark-color)}.btn-secondary:hover{background-color:#dee2e6}@media (max-width:768px){.action-bar{flex-direction:column}.action-btn{width:100%;justify-content:center}}