@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";
:root{--color-primary:#1a56db;--color-primary-dark:#1e3a5f;--color-primary-hover:#1741b6;--color-accent:#057a55;--color-accent-hover:#046644;--color-background:#f3f4f6;--color-surface:#fff;--color-border:#e5e7eb;--color-border-focus:#1a56db;--color-text:#111827;--color-text-secondary:#4b5563;--color-muted:#6b7280;--color-error:#dc2626;--color-error-bg:#fef2f2;--color-success:#057a55;--color-success-bg:#f0fdf4;--color-warning:#d97706;--color-warning-bg:#fffbeb;--color-info:#1a56db;--color-info-bg:#eff6ff;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--shadow-sm:0 1px 3px #00000014;--shadow-md:0 4px 12px #0000001a;--shadow-lg:0 8px 24px #0000001f;--font-family:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-size-xs:.75rem;--font-size-sm:.875rem;--font-size-base:1rem;--font-size-lg:1.125rem;--font-size-xl:1.25rem;--font-size-2xl:1.5rem;--font-size-3xl:1.875rem;--font-size-4xl:2.25rem;--spacing-xs:4px;--spacing-sm:8px;--spacing-md:16px;--spacing-lg:24px;--spacing-xl:32px;--spacing-2xl:48px;--spacing-3xl:64px;--container-max:1200px;--content-max:900px;--bg-primary:var(--color-background);--bg-secondary:#f9fafb;--bg-surface:var(--color-surface);--text-primary:var(--color-text);--text-secondary:var(--color-text-secondary);--border-light:var(--color-border);--primary:var(--color-primary);--accent:var(--color-accent)}[data-theme=dark]{--color-primary:#3b82f6;--color-primary-dark:#0f172a;--color-primary-hover:#60a5fa;--color-accent:#10b981;--color-accent-hover:#34d399;--color-background:#0b0f19;--color-surface:#111827;--color-border:#1f2937;--color-border-focus:#3b82f6;--color-text:#f9fafb;--color-text-secondary:#9ca3af;--color-muted:#6b7280;--color-error-bg:#450a0a;--color-success-bg:#064e3b;--color-warning-bg:#78350f;--color-info-bg:#1e3a8a;--bg-primary:#0b0f19;--bg-secondary:#1e293b;--bg-surface:#111827;--text-primary:#f9fafb;--text-secondary:#9ca3af;--border-light:#1f2937;--primary:#3b82f6;--accent:#10b981}@media print{.site-header,.site-footer,.ad-slot,.btn-group,.breadcrumb,.mobile-menu-btn,.mobile-search-bar{display:none!important}body{color:#000!important;background:#fff!important}.card{box-shadow:none!important;border:1px solid #ddd!important}}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;max-width:100vw;font-size:16px;overflow-x:clip}body{font-family:var(--font-family);font-size:var(--font-size-base);color:var(--color-text);background:var(--color-background);flex-direction:column;width:100%;max-width:100%;min-height:100vh;line-height:1.6;display:flex;overflow-x:clip}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}a:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px;border-radius:2px}img{max-width:100%;height:auto;display:block}h1,h2,h3,h4,h5,h6{color:var(--color-text);font-weight:600;line-height:1.3}h1{font-size:var(--font-size-3xl)}h2{font-size:var(--font-size-2xl)}h3{font-size:var(--font-size-xl)}h4{font-size:var(--font-size-lg)}p{margin-bottom:var(--spacing-md)}p:last-child{margin-bottom:0}ul,ol{padding-left:var(--spacing-lg)}li{margin-bottom:var(--spacing-xs)}table{border-collapse:collapse;width:100%}th,td{padding:var(--spacing-sm) var(--spacing-md);text-align:left;border-bottom:1px solid var(--color-border);font-size:var(--font-size-sm)}th{background:var(--color-background);font-weight:600}tr:hover td{background:var(--color-background)}.container{max-width:var(--container-max);padding:0 var(--spacing-lg);margin:0 auto}.container-sm{max-width:var(--content-max);padding:0 var(--spacing-lg);margin:0 auto}.page-wrapper{padding:var(--spacing-xl) 0 var(--spacing-3xl);flex:1}.site-header{background:var(--color-primary-dark);color:#fff;z-index:100;position:sticky;top:0;box-shadow:0 2px 8px #00000026}.header-inner{align-items:center;gap:var(--spacing-lg);padding:0 var(--spacing-lg);max-width:var(--container-max);height:60px;margin:0 auto;display:flex}.site-logo{font-size:var(--font-size-xl);color:#fff;letter-spacing:-.5px;align-items:center;gap:var(--spacing-sm);-webkit-user-select:none;user-select:none;flex-shrink:0;font-weight:700;text-decoration:none;display:flex}.site-logo:hover{color:#ffffffe6;text-decoration:none}.site-logo-img{border-radius:8px;flex-shrink:0}.site-logo-text{white-space:nowrap;font-size:1.25rem;font-weight:700}.header-actions{flex-shrink:0;align-items:center;gap:8px;margin-left:auto;display:flex}.header-lang-wrap{align-items:center;display:inline-flex}@media (max-width:768px){.header-inner{gap:8px;padding:0 12px}}@media (max-width:480px){.header-inner{gap:6px;padding:0 10px}.header-actions{gap:6px}.header-lang-wrap{display:none!important}.site-logo{gap:6px}.site-logo-img{width:30px!important;height:30px!important}.site-logo-text{font-size:1.05rem}}@media (max-width:360px){.header-inner{gap:4px;padding:0 8px}.header-actions,.site-logo{gap:4px}.site-logo-img{width:26px!important;height:26px!important}.site-logo-text{font-size:.95rem}}.header-nav{align-items:center;gap:var(--spacing-xs);flex:1;display:flex}.header-nav a{color:#ffffffd9;font-size:var(--font-size-sm);padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius-sm);white-space:nowrap;font-weight:500;transition:background .15s,color .15s}.header-nav a:hover{color:#fff;background:#ffffff1f;text-decoration:none}.header-nav a:focus-visible{outline-offset:2px;outline:2px solid #fff9}.header-search-wrap{flex:none;width:240px}.mobile-menu-btn{color:#fff;cursor:pointer;padding:var(--spacing-xs);background:0 0;border:none;margin-left:auto;font-size:1.5rem;display:none}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--spacing-xl);box-shadow:var(--shadow-sm)}.card-sm{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--spacing-lg);box-shadow:var(--shadow-sm)}.form-group{margin-bottom:var(--spacing-md)}.form-label{font-size:var(--font-size-sm);color:var(--color-text-secondary);margin-bottom:var(--spacing-xs);font-weight:600;display:block}.form-input,.form-select{width:100%;padding:10px var(--spacing-md);font-size:var(--font-size-base);font-family:var(--font-family);color:var(--color-text);background:var(--color-surface);border:1.5px solid var(--color-border);border-radius:var(--radius-md);appearance:none;outline:none;transition:border-color .15s,box-shadow .15s;display:block}.form-input:focus,.form-select:focus{border-color:var(--color-border-focus);box-shadow:0 0 0 3px #1a56db1f}.form-input::placeholder{color:var(--color-muted)}.form-input[aria-invalid=true]{border-color:var(--color-error)}.form-input[aria-invalid=true]:focus{box-shadow:0 0 0 3px #dc26261f}.form-select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236b7280' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right var(--spacing-md) center;padding-right:calc(var(--spacing-md) * 2.5)}.form-hint{font-size:var(--font-size-xs);color:var(--color-muted);margin-top:var(--spacing-xs)}.form-error{font-size:var(--font-size-xs);color:var(--color-error);margin-top:var(--spacing-xs)}.input-group{align-items:stretch;display:flex}.input-group .form-input{border-radius:var(--radius-md) 0 0 var(--radius-md);flex:1}.input-group-addon{padding:0 var(--spacing-md);background:var(--color-background);border:1.5px solid var(--color-border);border-radius:0 var(--radius-md) var(--radius-md) 0;font-size:var(--font-size-sm);color:var(--color-muted);white-space:nowrap;border-left:none;align-items:center;font-weight:500;display:flex}.input-prefix .input-group-addon{border-left:1.5px solid var(--color-border);border-radius:var(--radius-md) 0 0 var(--radius-md);border-right:none}.input-prefix .form-input{border-radius:0 var(--radius-md) var(--radius-md) 0}.btn{justify-content:center;align-items:center;gap:var(--spacing-xs);padding:10px var(--spacing-lg);font-size:var(--font-size-base);font-family:var(--font-family);border-radius:var(--radius-md);cursor:pointer;white-space:nowrap;-webkit-user-select:none;user-select:none;border:2px solid #0000;outline:none;font-weight:600;text-decoration:none;transition:background .15s,transform .1s,box-shadow .15s;display:inline-flex}.btn:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover{background:var(--color-primary-hover);color:#fff;text-decoration:none}.btn-success{background:var(--color-accent);color:#fff;font-size:var(--font-size-lg);padding:12px var(--spacing-xl)}.btn-success:hover{background:var(--color-accent-hover);color:#fff;text-decoration:none}.btn-secondary{background:var(--color-background);color:var(--color-text);border-color:var(--color-border)}.btn-secondary:hover{background:var(--color-border);text-decoration:none}.btn-ghost{color:var(--color-primary);padding:var(--spacing-xs) var(--spacing-sm);background:0 0;border-color:#0000}.btn-ghost:hover{background:var(--color-info-bg);text-decoration:none}.btn-lg{padding:14px var(--spacing-xl);font-size:var(--font-size-lg)}.btn-sm{padding:6px var(--spacing-md);font-size:var(--font-size-sm)}.btn-group{gap:var(--spacing-sm);flex-wrap:wrap;align-items:center;display:flex}.result-section{border-radius:var(--radius-lg);padding:var(--spacing-xl);margin:var(--spacing-xl) 0;background:linear-gradient(135deg,#f0fdf4 0%,#ecfdf5 100%);border:1px solid #a7f3d0}.result-section-title{font-size:var(--font-size-sm);text-transform:uppercase;letter-spacing:.08em;color:var(--color-accent);margin-bottom:var(--spacing-md);font-weight:700}.result-grid{gap:var(--spacing-md);grid-template-columns:repeat(auto-fit,minmax(180px,1fr));display:grid}.result-card{border-radius:var(--radius-md);padding:var(--spacing-md);text-align:center;box-shadow:var(--shadow-sm);background:#fff;border:1px solid #d1fae5}.result-card-label{font-size:var(--font-size-xs);text-transform:uppercase;letter-spacing:.06em;color:var(--color-muted);margin-bottom:var(--spacing-xs);font-weight:600}.result-card-value{font-size:var(--font-size-2xl);color:var(--color-accent);font-weight:700;line-height:1.2}.result-card-sub{font-size:var(--font-size-xs);color:var(--color-muted);margin-top:2px}.result-card.primary .result-card-value{font-size:var(--font-size-3xl);color:var(--color-primary)}.info-box{background:var(--color-info-bg);border-left:4px solid var(--color-primary);border-radius:0 var(--radius-md) var(--radius-md) 0;padding:var(--spacing-md) var(--spacing-lg);margin:var(--spacing-lg) 0}.warning-box{background:var(--color-warning-bg);border-left:4px solid var(--color-warning);border-radius:0 var(--radius-md) var(--radius-md) 0;padding:var(--spacing-md) var(--spacing-lg);margin:var(--spacing-lg) 0;font-size:var(--font-size-sm)}.disclaimer-box{border:1px dashed var(--color-border);border-radius:var(--radius-md);padding:var(--spacing-md);font-size:var(--font-size-sm);color:var(--color-muted);margin:var(--spacing-lg) 0;background:#f9fafb}.formula-box{color:#e2e8f0;border-radius:var(--radius-md);padding:var(--spacing-lg);font-family:Courier New,Courier,monospace;font-size:var(--font-size-sm);margin:var(--spacing-md) 0;white-space:pre-wrap;background:#1e293b;line-height:1.7;overflow-x:auto}.faq-list{margin:0;padding:0;list-style:none}.faq-item{border-bottom:1px solid var(--color-border);padding:var(--spacing-md) 0}.faq-item:first-child{padding-top:0}.faq-item:last-child{border-bottom:none}.faq-question{color:var(--color-text);margin-bottom:var(--spacing-sm);font-weight:600}.faq-answer{color:var(--color-text-secondary);font-size:var(--font-size-sm)}.faq-answer p{margin-bottom:var(--spacing-sm)}.breadcrumbs{align-items:center;gap:var(--spacing-xs);font-size:var(--font-size-sm);color:var(--color-muted);margin-bottom:var(--spacing-lg);flex-wrap:wrap;display:flex}.breadcrumbs a{color:var(--color-primary)}.breadcrumbs a:hover{text-decoration:underline}.breadcrumb-sep{color:var(--color-border);font-size:.75rem}.breadcrumb-current{color:var(--color-text-secondary)}.section-title{font-size:var(--font-size-xl);color:var(--color-text);margin-bottom:var(--spacing-md);padding-bottom:var(--spacing-sm);border-bottom:2px solid var(--color-border);font-weight:700}.calc-layout{gap:var(--spacing-xl);grid-template-columns:1fr 340px;align-items:start;display:grid}.calc-main{min-width:0}.calc-sidebar{position:sticky;top:80px}.calc-page-title{font-size:var(--font-size-3xl);margin-bottom:var(--spacing-sm);font-weight:700}.calc-intro{color:var(--color-text-secondary);margin-bottom:var(--spacing-xl);font-size:var(--font-size-lg)}.related-calc-list{margin:0;padding:0;list-style:none}.related-calc-list li{border-bottom:1px solid var(--color-border);margin:0}.related-calc-list li:last-child{border-bottom:none}.related-calc-list a{align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) 0;color:var(--color-primary);font-size:var(--font-size-sm);font-weight:500;transition:padding-left .15s;display:flex}.related-calc-list a:hover{padding-left:var(--spacing-xs);text-decoration:none}.table-wrap{margin:var(--spacing-md) 0;border-radius:var(--radius-md);border:1px solid var(--color-border);overflow-x:auto}.data-table{border-collapse:collapse;width:100%}.data-table th{background:var(--color-primary-dark);color:#fff;font-size:var(--font-size-xs);text-transform:uppercase;letter-spacing:.05em;padding:var(--spacing-sm) var(--spacing-md)}.data-table td{padding:var(--spacing-sm) var(--spacing-md);font-size:var(--font-size-sm)}.data-table tr:nth-child(2n) td{background:var(--color-background)}.data-table tr:hover td{background:#eff6ff}.data-table td.num{text-align:right;font-variant-numeric:tabular-nums}.error-alert{background:var(--color-error-bg);border-radius:var(--radius-md);padding:var(--spacing-md) var(--spacing-lg);color:var(--color-error);margin:var(--spacing-md) 0;align-items:center;gap:var(--spacing-sm);border:1px solid #fca5a5;font-weight:500;display:flex}.search-wrap{position:relative}.search-input{width:100%;padding:8px var(--spacing-md) 8px 36px;color:#fff;font-size:var(--font-size-sm);font-family:var(--font-family);background:#ffffff1f;border:1.5px solid #ffffff4d;border-radius:24px;outline:none;transition:background .15s,border-color .15s}.search-input::placeholder{color:#fff9}.search-input:focus{background:#fff3;border-color:#fff9}.search-icon{color:#fff9;pointer-events:none;font-size:.9rem;position:absolute;top:50%;left:10px;transform:translateY(-50%)}.search-results{border:1px solid var(--color-border);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);z-index:200;background:#fff;max-height:320px;position:absolute;top:calc(100% + 4px);left:0;right:0;overflow-y:auto}.search-result-item{align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);border-bottom:1px solid var(--color-border);cursor:pointer;color:var(--color-text);text-decoration:none;transition:background .1s;display:flex}.search-result-item:last-child{border-bottom:none}.search-result-item:hover{background:var(--color-info-bg);text-decoration:none}.search-result-item .result-name{font-weight:500;font-size:var(--font-size-sm)}.search-result-item .result-cat{font-size:var(--font-size-xs);color:var(--color-muted)}.search-result-empty{padding:var(--spacing-md);text-align:center;color:var(--color-muted);font-size:var(--font-size-sm)}.hero-section{background:linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);color:#fff;padding:var(--spacing-3xl) 0;text-align:center}.hero-title{margin-bottom:var(--spacing-md);letter-spacing:-1px;font-size:clamp(2rem,5vw,3.5rem);font-weight:800}.hero-subtitle{font-size:clamp(1rem, 2.5vw, var(--font-size-lg));color:#ffffffd9;max-width:600px;margin:0 auto var(--spacing-xl)}.hero-search-box{max-width:540px;margin:0 auto;position:relative}.hero-search-input{width:100%;font-size:var(--font-size-lg);font-family:var(--font-family);box-shadow:var(--shadow-lg);color:var(--color-text);border:none;border-radius:50px;outline:none;padding:16px 24px 16px 52px}.hero-search-icon{color:var(--color-muted);font-size:1.2rem;position:absolute;top:50%;left:18px;transform:translateY(-50%)}.hero-search-results{border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);z-index:200;text-align:left;background:#fff;max-height:360px;position:absolute;top:calc(100% + 6px);left:0;right:0;overflow-y:auto}.popular-links{margin-top:var(--spacing-lg);gap:var(--spacing-sm);flex-wrap:wrap;justify-content:center;display:flex}.popular-link{color:#fff;padding:6px var(--spacing-md);font-size:var(--font-size-sm);background:#ffffff26;border-radius:20px;font-weight:500;transition:background .15s}.popular-link:hover{color:#fff;background:#ffffff40;text-decoration:none}.category-grid{gap:var(--spacing-lg);margin:var(--spacing-xl) 0;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));display:grid}.category-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-xl);padding:var(--spacing-xl);gap:var(--spacing-sm);flex-direction:column;text-decoration:none;transition:transform .15s,box-shadow .15s;display:flex}.category-card:hover{box-shadow:var(--shadow-md);text-decoration:none;transform:translateY(-3px)}.category-card-icon{margin-bottom:var(--spacing-sm);font-size:2.5rem}.category-card-name{font-size:var(--font-size-xl);color:var(--color-text);font-weight:700}.category-card-desc{font-size:var(--font-size-sm);color:var(--color-text-secondary);flex:1}.category-card-count{font-size:var(--font-size-xs);color:var(--color-muted);font-weight:600}.calc-card-grid{gap:var(--spacing-md);grid-template-columns:repeat(auto-fill,minmax(200px,1fr));display:grid}.calc-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--spacing-md);align-items:flex-start;gap:var(--spacing-sm);text-decoration:none;transition:border-color .15s,box-shadow .15s;display:flex}.calc-card:hover{border-color:var(--color-primary);box-shadow:var(--shadow-sm);text-decoration:none}.calc-card-icon{flex-shrink:0;font-size:1.3rem}.calc-card-name{font-size:var(--font-size-sm);color:var(--color-text);font-weight:600}.calc-card-desc{font-size:var(--font-size-xs);color:var(--color-muted);margin-top:2px}.category-page-header{background:linear-gradient(135deg, var(--color-primary-dark) 0%, #1e4d91 100%);color:#fff;padding:var(--spacing-2xl) 0 var(--spacing-xl)}.category-list-section{margin-bottom:var(--spacing-2xl)}.site-footer{background:var(--color-primary-dark);color:#ffffffbf;padding:var(--spacing-2xl) 0 var(--spacing-lg);margin-top:auto}.footer-grid{gap:var(--spacing-xl);margin-bottom:var(--spacing-xl);grid-template-columns:2fr repeat(3,1fr);display:grid}.footer-brand-name{font-size:var(--font-size-xl);color:#fff;margin-bottom:var(--spacing-sm);font-weight:700}.footer-brand-desc{font-size:var(--font-size-sm);line-height:1.6}.footer-section-title{font-size:var(--font-size-sm);color:#fff;text-transform:uppercase;letter-spacing:.06em;margin-bottom:var(--spacing-md);font-weight:700}.footer-links{margin:0;padding:0;list-style:none}.footer-links li{margin-bottom:var(--spacing-xs)}.footer-links a{color:#ffffffb3;font-size:var(--font-size-sm);transition:color .15s}.footer-links a:hover{color:#fff;text-decoration:none}.footer-bottom{padding-top:var(--spacing-lg);font-size:var(--font-size-sm);justify-content:space-between;align-items:center;gap:var(--spacing-sm);border-top:1px solid #ffffff1a;flex-wrap:wrap;display:flex}.ad-slot{text-align:center;width:100%;padding:var(--spacing-sm) 0}.ad-slot-leaderboard{min-height:90px}.ad-slot-sidebar{min-height:250px}.ad-slot-in-content{min-height:100px;margin:var(--spacing-xl) 0}.sci-calc-wrap{border-radius:var(--radius-xl);padding:var(--spacing-lg);max-width:420px;box-shadow:var(--shadow-lg);background:#1e293b;margin:0 auto}.sci-display{border-radius:var(--radius-md);padding:var(--spacing-md) var(--spacing-lg);margin-bottom:var(--spacing-md);text-align:right;background:#0f172a;flex-direction:column;justify-content:flex-end;min-height:80px;display:flex}.sci-expression{font-size:var(--font-size-sm);color:#fff6;word-break:break-all;min-height:20px;margin-bottom:4px;font-family:monospace}.sci-value{color:#fff;word-break:break-all;font-family:monospace;font-size:2rem;font-weight:700}.sci-grid{gap:6px;display:grid}.sci-btn{border-radius:var(--radius-sm);cursor:pointer;font-size:.9rem;font-weight:600;font-family:var(--font-family);border:none;padding:14px 8px;transition:filter .1s,transform .1s}.sci-btn:hover{filter:brightness(1.15)}.sci-btn:active{transform:scale(.96)}.sci-btn-num{color:#f1f5f9;background:#334155}.sci-btn-op{color:#fff;background:#1e40af}.sci-btn-fn{color:#d1d5db;background:#374151;font-size:.78rem}.sci-btn-eq{background:var(--color-accent);color:#fff;font-size:1.2rem}.sci-btn-clear{color:#fff;background:#991b1b}.sci-btn-zero{grid-column:span 2}.toggle-group{border:1.5px solid var(--color-border);border-radius:var(--radius-md);display:inline-flex;overflow:hidden}.toggle-btn{padding:7px var(--spacing-md);background:var(--color-surface);font-size:var(--font-size-sm);cursor:pointer;color:var(--color-text-secondary);font-weight:500;font-family:var(--font-family);border:none;border-right:1px solid var(--color-border);transition:background .15s,color 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