h1{margin-bottom:2rem;color:#2c3e50}.page-intro{margin-bottom:3rem;font-size:1.1rem;color:#666;line-height:1.6}.tool-category{margin-bottom:4rem}.category-title{font-size:1.8rem;color:#2c3e50;margin-bottom:2rem;padding-bottom:.5rem;border-bottom:3px solid #3498db}.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;margin-bottom:2rem}.tool-item{background:#fff;padding:1.5rem;border-radius:10px;box-shadow:0 2px 10px #0000001a;transition:transform .3s,box-shadow .3s}.tool-item:hover{transform:translateY(-5px);box-shadow:0 4px 20px #00000026}.tool-icon{font-size:3rem;margin-bottom:1rem;text-align:center}.tool-item h3{margin-bottom:.75rem;color:#2c3e50;font-size:1.3rem}.tool-description{color:#666;line-height:1.6;margin-bottom:1rem;font-size:.95rem}.tool-link{display:inline-block;color:#3498db;text-decoration:none;font-weight:600;transition:color .3s}.tool-link:hover{color:#2980b9}.tool-detail-header{margin-bottom:2rem}.back-link{display:inline-block;color:#3498db;text-decoration:none;margin-bottom:1rem;font-weight:500;transition:color .3s}.back-link:hover{color:#2980b9}.tool-detail-content{max-width:900px}.tool-detail-content section{margin-bottom:3rem}.tool-detail-content h2{color:#2c3e50;margin-bottom:1rem;font-size:1.5rem;padding-bottom:.5rem;border-bottom:2px solid #ecf0f1}.tool-detail-content p{line-height:1.8;color:#555;margin-bottom:1rem}.tool-detail-content ul{line-height:1.8;color:#555;padding-left:1.5rem}.tool-detail-content ul li{margin-bottom:.5rem}.tool-detail-content ul li strong{color:#2c3e50}.calculator-card{background:#fff;padding:2rem;border-radius:10px;box-shadow:0 2px 10px #0000001a;margin-top:1rem}.calc-form{display:flex;flex-direction:column;gap:1rem}.calc-form label{font-weight:700;color:#555}.calc-form input,.calc-form select{padding:.75rem;border:2px solid #ddd;border-radius:5px;font-size:1rem;transition:border-color .3s}.calc-form input:focus,.calc-form select:focus{outline:none;border-color:#3498db}.result{margin-top:1.5rem;padding:1.5rem;border-radius:5px;display:none}.result.show{display:block}.result.error{background-color:#ffebee;border-left:4px solid #f44336;color:#c62828}.result-success{background-color:#e8f5e9;border-left:4px solid #4caf50;color:#2e7d32;padding:1rem;border-radius:5px}.result-success h3{margin-top:0;margin-bottom:.75rem;color:#2e7d32}.result-success p{margin-bottom:.5rem;color:#2e7d32}.result-success .tip{margin-top:1rem;padding-top:1rem;border-top:1px solid rgba(46,125,50,.3);font-size:.9rem;color:#388e3c}.hr-zones{margin-top:1rem}.hr-zones p{margin-bottom:.5rem}.plan-list{margin-top:1rem}.plan-list li{margin-bottom:.75rem}.tool-card{background:#fff;padding:2rem;border-radius:10px;box-shadow:0 2px 10px #0000001a}.tool-card h2{margin-bottom:1.5rem;color:#2c3e50;border-bottom:2px solid #3498db;padding-bottom:.5rem}.tool-form{display:flex;flex-direction:column;gap:1rem}.tool-form label{font-weight:700;color:#555}.tool-form input{padding:.75rem;border:2px solid #ddd;border-radius:5px;font-size:1rem;transition:border-color .3s}.tool-form input:focus{outline:none;border-color:#3498db}@media (max-width: 768px){.tools-grid{grid-template-columns:1fr}.tool-detail-content{padding:0 1rem}.calculator-card{padding:1.5rem}}