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32px}.cat-hero-inner{gap:18px;padding-top:8px;padding-bottom:8px}.cat-hero-icon,.cat-hero-inner{display:-ms-flexbox;display:flex;-ms-flex-align:center;align-items:center}.cat-hero-icon{width:60px;height:60px;border-radius:16px;background:#fff;-ms-flex-pack:center;justify-content:center;-webkit-box-shadow:var(--shadow-xs);box-shadow:var(--shadow-xs)}.cat-hero-sub{color:var(--text-secondary);font-size:17px;margin:8px 0 0;max-width:720px;line-height:1.5}.chips{display:-ms-flexbox;display:flex;-ms-flex-wrap:wrap;flex-wrap:wrap;gap:8px;padding:22px 0 16px}.chip{display:-ms-inline-flexbox;display:inline-flex;-ms-flex-align:center;align-items:center;gap:6px;padding:8px 14px;border-radius:999px;font-size:14px;font-weight:500;background:#fff;border:1px solid var(--border-default);color:var(--text-secondary);cursor:pointer}.chip:hover{border-color:var(--border-hover);color:var(--text-primary)}.chip.is-active{background:var(--surface-soft);color:var(--brand-primary-hover);border-color:#bfdbfe}.chip-sm{padding:5px 10px;font-size:13px}.filter-bar{-ms-flex-pack:justify;justify-content:space-between;gap:12px;padding:6px 0 18px;border-bottom:1px solid var(--border-default);margin-bottom:18px}.filter-bar,.filter-side{display:-ms-flexbox;display:flex;-ms-flex-align:center;align-items:center;-ms-flex-wrap:wrap;flex-wrap:wrap}.filter-side{gap:8px;color:var(--text-muted);font-size:14px}.filter-result{color:var(--text-secondary)}.filter-sort{color:var(--text-primary);font-weight:500;cursor:pointer}.cta-block{display:-ms-flexbox;display:flex;-ms-flex-align:center;align-items:center;-ms-flex-pack:justify;justify-content:space-between;gap:16px;margin:40px 0;padding:22px 24px;background:var(--surface-soft);border:1px solid #bfdbfe;border-radius:var(--radius-lg)}.cta-block p{margin:4px 0 0;color:var(--text-secondary)}.calc-head{padding:8px 0 24px}.calc-head .h1{margin-top:10px}.calc-lede{max-width:720px;font-size:17px;color:var(--text-secondary);line-height:1.55;margin:10px 0 0}.calc-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;grid-gap:28px;gap:28px;-ms-flex-align:start;align-items:start;padding-bottom:32px}@media (max-width:1023px){.calc-layout{grid-template-columns:1fr}}.advanced summary{font-size:14px;color:var(--brand-primary);font-weight:500;cursor:pointer;padding:6px 0;list-style:none}.advanced summary:before{content:"▸ ";margin-right:4px}.advanced[open] summary:before{content:"▾ "}.advanced-body{padding-top:8px;display:grid;grid-template-columns:1fr 1fr;grid-gap:14px;gap:14px}.formula{background:var(--surface-page)}.formula-line{font-family:var(--font-mono);font-size:17px;color:var(--text-primary);padding:14px;background:#fff;border:1px solid var(--border-default);border-radius:10px;margin:10px 0 14px;-webkit-font-feature-settings:"tnum";font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.formula-line em{color:var(--brand-primary);font-style:normal}.formula-vars{display:-ms-flexbox;display:flex;-ms-flex-direction:column;flex-direction:column;gap:6px;font-size:14px;color:var(--text-secondary)}.formula-vars span{font-family:var(--font-mono);color:var(--text-primary);font-weight:500;display:inline-block;min-width:100px}.example p{margin:6px 0 0;color:var(--text-secondary);font-size:15px;line-height:1.6}.faq-list{display:-ms-flexbox;display:flex;-ms-flex-direction:column;flex-direction:column}.faq-item{border-top:1px solid var(--border-default)}.faq-item:first-child{border-top:0}.faq-q{width:100%;display:-ms-flexbox;display:flex;-ms-flex-align:center;align-items:center;-ms-flex-pack:justify;justify-content:space-between;gap:12px;padding:14px 0;font-size:16px;font-weight:600;color:var(--text-primary);background:transparent;border:0;cursor:pointer;text-align:left}.faq-item.is-open .faq-q{color:var(--brand-primary-hover)}.faq-ic{width:24px;height:24px;border-radius:50%;background:var(--surface-page);color:var(--text-muted);display:-ms-flexbox;display:flex;-ms-flex-align:center;align-items:center;-ms-flex-pack:center;justify-content:center;-webkit-transition:-webkit-transform var(--dur-base) var(--ease-out);transition:-webkit-transform var(--dur-base) var(--ease-out);transition:transform var(--dur-base) var(--ease-out);transition:transform var(--dur-base) var(--ease-out),-webkit-transform var(--dur-base) var(--ease-out);-ms-flex:none;flex:none}.faq-item.is-open .faq-ic{background:var(--surface-soft);color:var(--brand-primary-hover);-webkit-transform:rotate(45deg);transform:rotate(45deg)}.faq-a{padding:0 0 14px;color:var(--text-secondary);font-size:15px;line-height:1.6;max-width:640px}.disclaim{background:var(--surface-warning-soft);border:1px solid #fcd34d;border-radius:12px;padding:12px 14px;display:-ms-flexbox;display:flex;gap:10px;-ms-flex-align:start;align-items:flex-start;font-size:14px;color:#92400e;line-height:1.5;margin-bottom:12px}.disclaim svg{color:#b45309;-ms-flex:none;flex:none;margin-top:2px}.updated{display:-ms-flexbox;display:flex;gap:10px;-ms-flex-align:center;align-items:center;font-size:13px;color:var(--text-muted);margin-bottom:30px}.updated-dot{width:6px;height:6px;border-radius:50%;background:#10b981;display:inline-block}.calc-aside{display:-ms-flexbox;display:flex;-ms-flex-direction:column;flex-direction:column;gap:14px;position:sticky;top:88px}.aside-card{background:#fff;border:1px solid var(--border-default);border-radius:var(--radius-lg);padding:18px;-webkit-box-shadow:var(--shadow-xs);box-shadow:var(--shadow-xs)}.aside-card .eyebrow{margin-bottom:8px;display:block}.aside-list{list-style:none;margin:0;padding:0}.aside-list li{border-top:1px solid var(--border-default)}.aside-list li:first-child{border:0}.aside-list a{display:-ms-flexbox;display:flex;-ms-flex-align:center;align-items:center;-ms-flex-pack:justify;justify-content:space-between;padding:11px 0;text-decoration:none;color:var(--text-primary);font-size:14px;font-weight:500}.aside-list a:hover{color:var(--brand-primary-hover)}.aside-list svg{color:var(--text-muted)}.aside-ad{background:var(--surface-page);border-style:dashed;border-color:var(--border-hover)}.ad-label{font-size:10px;font-family:var(--font-mono);color:var(--text-muted);text-transform:uppercase;letter-spacing:.08em;margin-bottom:8px}.aside-ad .ad-body{display:-ms-flexbox;display:flex;-ms-flex-align:center;align-items:center;-ms-flex-pack:center;justify-content:center;height:200px;background:#fff;border:1px solid var(--border-default);border-radius:10px;color:var(--text-muted);font-size:13px}.aside-aff h4{margin:4px 0 6px;font-size:16px;color:var(--text-primary);font-weight:600}.aside-aff p{font-size:14px;line-height:1.5;margin:0 0 12px}.aff-fine,.aside-aff p{color:var(--text-muted)}.aff-fine{font-size:11px;margin-top:8px}.related{padding:24px 0 56px}.site-footer{background:#fff;border-top:1px solid var(--border-default);margin-top:32px}.footer-inner{max-width:var(--max-content);margin:0 auto;padding:40px 32px 28px;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;grid-gap:32px;gap:32px}@media (max-width:767px){.footer-inner{grid-template-columns:1fr 1fr}}.footer-col h4{font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted);margin:0 0 14px}.footer-col a{display:block;padding:4px 0;color:var(--text-secondary);text-decoration:none;font-size:14px}.footer-col a:hover{color:var(--text-primary)}.footer-brand p{color:var(--text-muted);font-size:14px;max-width:320px;line-height:1.55;margin:12px 0 0}.logo-footer{font-size:16px}.footer-fine{max-width:var(--max-content);margin:0 auto;padding:14px 32px 28px;font-size:12px;color:var(--text-muted);border-top:1px solid var(--border-default)}