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var(--transition-fast);outline:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%239999aa' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 1rem center;padding-right:2.5rem}.select:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px #ff6b001a}.result-card{background:linear-gradient(145deg,#ff6b0014,#00d4aa0d);border:1px solid rgba(255,107,0,.2);border-radius:var(--radius-lg);padding:var(--space-xl)}.result-value{font-size:var(--text-4xl);font-weight:800;font-family:var(--font-mono);background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1.2}.result-label{font-size:var(--text-sm);color:var(--color-text-secondary);text-transform:uppercase;letter-spacing:.08em;margin-top:var(--space-xs)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--color-bg)}::-webkit-scrollbar-thumb{background:var(--color-primary);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:#ff8c2a}*{scrollbar-color:var(--color-primary) var(--color-bg);scrollbar-width:thin}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes pulse-glow{0%,to{box-shadow:0 0 20px #ff6b001a}50%{box-shadow:0 0 40px #ff6b004d}}.animate-fade-in-up{animation:fadeInUp .6s ease-out forwards}.animate-float{animation:float 3s ease-in-out infinite}@media(max-width:768px){:root{--text-5xl: 2.25rem;--text-6xl: 2.75rem;--text-4xl: 1.875rem}.container{padding:0 var(--space-md)}.section{padding:var(--space-3xl) 0}}.tool-content{max-width:800px;margin:0 auto}.tool-content h2{font-size:var(--text-2xl);font-weight:800;letter-spacing:-.02em;margin-top:var(--space-3xl);margin-bottom:var(--space-lg);color:var(--color-text);position:relative;padding-bottom:var(--space-sm)}.tool-content h2:after{content:"";position:absolute;bottom:0;left:0;width:48px;height:3px;background:var(--gradient-primary);border-radius:2px}.tool-content h3{font-size:var(--text-lg);font-weight:700;margin-top:var(--space-xl);margin-bottom:var(--space-md);color:var(--color-text)}.tool-content p{font-size:var(--text-base);color:var(--color-text-secondary);line-height:1.85;margin-bottom:var(--space-lg)}.tool-content strong{color:var(--color-text);font-weight:600}.tool-content ul,.tool-content ol{margin-bottom:var(--space-lg);padding-left:1.5rem;color:var(--color-text-secondary)}.tool-content li{line-height:1.8;margin-bottom:var(--space-xs)}.tool-content a{color:var(--color-primary);text-decoration:underline;text-underline-offset:3px;transition:color var(--transition-fast)}.tool-content a:hover{color:var(--color-primary-light)}.formula-card{background:linear-gradient(135deg,#ff6b000f,#00d4aa0a);border:1px solid rgba(255,107,0,.15);border-radius:var(--radius-lg);padding:var(--space-xl) var(--space-2xl);margin:var(--space-xl) 0;text-align:center}.formula-card code{font-family:var(--font-mono);font-size:var(--text-lg);font-weight:600;color:var(--color-primary);letter-spacing:.02em}.formula-card .formula-label{display:block;font-size:var(--text-xs);color:var(--color-text-muted);margin-top:var(--space-sm);text-transform:uppercase;letter-spacing:.08em}.info-box{border-radius:var(--radius-lg);padding:var(--space-lg) var(--space-xl);margin:var(--space-xl) 0;display:flex;gap:var(--space-md);align-items:flex-start}.info-box--tip{background:#00d4aa0f;border:1px solid rgba(0,212,170,.15)}.info-box--warning{background:#ffc1070f;border:1px solid rgba(255,193,7,.15)}.info-box--info{background:#7c5cff0f;border:1px solid rgba(124,92,255,.15)}.info-box .info-icon{font-size:1.3rem;flex-shrink:0;margin-top:.1rem}.info-box .info-text{font-size:var(--text-sm);line-height:1.7;color:var(--color-text-secondary)}.info-box .info-text strong{color:var(--color-text)}.data-table-wrap{overflow-x:auto;margin:var(--space-xl) 0;border-radius:var(--radius-lg);border:1px solid var(--color-border)}.data-table{width:100%;border-collapse:collapse;font-size:var(--text-sm)}.data-table th{padding:var(--space-md) var(--space-lg);text-align:left;background:#ffffff08;border-bottom:1px solid var(--color-border);color:var(--color-text);font-weight:600;font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.06em;white-space:nowrap}.data-table td{padding:var(--space-md) var(--space-lg);border-bottom:1px solid rgba(255,255,255,.03);color:var(--color-text-secondary)}.data-table tbody tr:hover td{background:#ff6b0008}.data-table .highlight{color:var(--color-primary);font-weight:600;font-family:var(--font-mono)}.feature-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:var(--space-lg);margin:var(--space-xl) 0}.feature-card{padding:var(--space-lg);border-radius:var(--radius-lg);border:1px solid var(--color-border);background:#ffffff04;transition:all var(--transition-base)}.feature-card:hover{border-color:#ff6b0033;background:#ff6b0005}.feature-card .feature-icon{font-size:1.5rem;margin-bottom:var(--space-sm)}.feature-card h4{font-size:var(--text-sm);font-weight:700;color:var(--color-text);margin-bottom:var(--space-xs)}.feature-card p{font-size:var(--text-xs);color:var(--color-text-muted);line-height:1.6;margin-bottom:0}.steps{counter-reset:step-counter;list-style:none;padding-left:0;margin:var(--space-xl) 0}.steps li{counter-increment:step-counter;position:relative;padding-left:3.5rem;margin-bottom:var(--space-xl);line-height:1.7}.steps li:before{content:counter(step-counter);position:absolute;left:0;top:0;width:2.2rem;height:2.2rem;border-radius:50%;background:linear-gradient(135deg,var(--color-primary),var(--color-primary-dark));color:#fff;font-size:var(--text-sm);font-weight:700;display:flex;align-items:center;justify-content:center;text-align:center;line-height:2.2rem}.steps li strong{display:block;font-size:var(--text-base);color:var(--color-text);margin-bottom:var(--space-xs)}.faq-section{margin-top:var(--space-3xl)}.faq-section h2{text-align:center;margin-bottom:var(--space-2xl)}.faq-section h2:after{left:50%;transform:translate(-50%)}.faq-item{border:1px solid var(--color-border);border-radius:var(--radius-lg);margin-bottom:var(--space-md);overflow:hidden;transition:border-color var(--transition-base)}.faq-item:hover{border-color:#ff6b0033}.faq-question{width:100%;display:flex;align-items:center;justify-content:space-between;gap:var(--space-md);padding:var(--space-lg) var(--space-xl);background:#ffffff04;border:none;color:var(--color-text);font-size:var(--text-base);font-weight:600;font-family:inherit;text-align:left;cursor:pointer;transition:background var(--transition-fast)}.faq-question:hover{background:#ff6b0008}.faq-chevron{flex-shrink:0;width:20px;height:20px;color:var(--color-text-muted);transition:transform var(--transition-base)}.faq-item.open .faq-chevron{transform:rotate(180deg);color:var(--color-primary)}.faq-answer{display:none;padding:0 var(--space-xl) var(--space-xl)}.faq-item.open .faq-answer{display:block}.faq-answer p{font-size:var(--text-sm);color:var(--color-text-secondary);line-height:1.8;margin-bottom:var(--space-sm)}.faq-answer p:last-child{margin-bottom:0}.tool-cta-banner{margin-top:var(--space-3xl);padding:var(--space-2xl);border-radius:var(--radius-xl);background:linear-gradient(135deg,#ff6b0014,#00d4aa0d);border:1px solid rgba(255,107,0,.12);text-align:center}.tool-cta-banner h3{font-size:var(--text-xl);font-weight:800;margin-bottom:var(--space-sm)}.tool-cta-banner p{color:var(--color-text-muted);margin-bottom:var(--space-lg);max-width:480px;margin-left:auto;margin-right:auto}.tool-cta-banner .cta-links{display:flex;justify-content:center;gap:var(--space-md);flex-wrap:wrap}.tool-cta-banner .cta-links a{padding:var(--space-sm) var(--space-lg);border-radius:var(--radius-md);font-size:var(--text-sm);font-weight:600;text-decoration:none;transition:all var(--transition-fast)}.tool-cta-banner .cta-link-primary{background:var(--color-primary);color:#fff}.tool-cta-banner .cta-link-primary:hover{background:var(--color-primary-light)}.tool-cta-banner .cta-link-secondary{border:1px solid var(--color-border);color:var(--color-text-secondary)}.tool-cta-banner .cta-link-secondary:hover{border-color:var(--color-primary);color:var(--color-primary)}