:root{--bg:#f8fafc;--bg-hero:linear-gradient(180deg,#eff6ff,#f8fafc 70%);--card:#ffffff;--text:#0f172a;--muted:#64748b;--border:#e2e8f0;--primary:#2563eb;--primary-hover:#1d4ed8;--primary-soft:#dbeafe;--radius:14px}*{box-sizing:border-box}body,html{margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:1080px;margin:0 auto;padding:0 20px}.site-header{background:var(--card);border-bottom:1px solid var(--border);position:-webkit-sticky;position:sticky;top:0;z-index:50}.site-header .container{display:flex;align-items:center;justify-content:space-between;height:60px}.logo{font-weight:800;font-size:20px;color:var(--text)}.logo span{color:var(--primary)}.logo:hover{text-decoration:none}.nav{display:flex;gap:20px;align-items:center}.nav a{color:var(--muted);font-size:15px;font-weight:500}.nav a:hover{color:var(--primary);text-decoration:none}.hero{background:var(--bg-hero);padding:72px 20px 56px;text-align:center}.hero h1{font-size:clamp(32px,5vw,52px);font-weight:800;margin:0 0 14px;letter-spacing:-.02em}.hero p{font-size:19px;color:var(--muted);max-width:640px;margin:0 auto 30px}.search-box{width:100%;max-width:560px;margin:0 auto;display:flex;background:var(--card);border:2px solid var(--border);border-radius:999px;padding:4px;box-shadow:0 4px 20px rgba(37,99,235,.08)}.search-box input{flex:1 1;border:none;outline:none;font-size:17px;padding:12px 20px;border-radius:999px;background:transparent;color:var(--text)}.trust-line{margin-top:16px;font-size:14px;color:var(--muted)}.trust-line b{color:var(--primary)}.section{padding:48px 0}.section-title{font-size:28px;font-weight:700;margin:0 0 24px}.grid{display:grid;grid-gap:16px;gap:16px}.grid-4{grid-template-columns:repeat(auto-fill,minmax(230px,1fr))}.grid-3{grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:22px;display:block;transition:box-shadow .15s,transform .15s,border-color .15s;color:var(--text)}.card:hover{border-color:var(--primary);box-shadow:0 8px 24px rgba(37,99,235,.1);transform:translateY(-2px);text-decoration:none}.card .icon{font-size:28px}.card h3{margin:10px 0 6px;font-size:17px;font-weight:700;color:var(--text)}.card p{margin:0;font-size:14px;color:var(--muted);line-height:1.5}.card .count{display:inline-block;margin-top:10px;font-size:12.5px;font-weight:600;color:var(--primary);background:var(--primary-soft);border-radius:999px;padding:2px 10px}.tool-hero{background:var(--bg-hero);padding:44px 20px 36px;text-align:center}.tool-hero h1{font-size:clamp(28px,4vw,40px);font-weight:800;margin:0 0 10px;letter-spacing:-.02em}.tool-hero p{color:var(--muted);font-size:17px;max-width:680px;margin:0 auto}.breadcrumb{font-size:13.5px;margin-bottom:14px}.breadcrumb,.breadcrumb a{color:var(--muted)}.tool-box{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:28px;box-shadow:0 4px 24px rgba(15,23,42,.05)}.prose h2{font-size:22px;font-weight:700;margin:34px 0 10px}.prose p{color:#334155;margin:0 0 12px}.faq-item{border:1px solid var(--border);border-radius:var(--radius);background:var(--card);padding:18px 20px;margin-bottom:12px}.faq-item h3{margin:0 0 6px;font-size:16px;font-weight:700}.faq-item p{margin:0;color:#475569;font-size:15px}.field{margin-bottom:16px}.field label{display:block;font-size:14px;font-weight:600;margin-bottom:6px;color:#334155}.field input[type=date],.field input[type=number],.field input[type=text],.field select,.field textarea{width:100%;padding:11px 14px;font-size:16px;border:1.5px solid var(--border);border-radius:10px;background:#fff;color:var(--text);outline:none;font-family:inherit}.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--primary)}.field textarea{resize:vertical;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px}.row{display:flex;gap:16px;flex-wrap:wrap}.row>.field{flex:1 1;min-width:160px}.btn{display:inline-block;background:var(--primary);color:#fff;border:none;font-size:16px;font-weight:700;padding:12px 26px;border-radius:12px;cursor:pointer;transition:background .15s,transform .1s}.btn:hover{background:var(--primary-hover)}.btn:active{transform:scale(.98)}.btn-secondary{background:#fff;color:var(--primary);border:1.5px solid var(--border)}.btn-secondary:hover{border-color:var(--primary);background:var(--primary-soft)}.btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:6px}.result{margin-top:20px;background:var(--primary-soft);border:1px solid #bfdbfe;border-radius:var(--radius);padding:20px}.result .big{font-size:30px;font-weight:800;color:var(--primary)}.result-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));grid-gap:12px;gap:12px;margin-top:20px}.result-cell{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:14px 16px}.result-cell .label{font-size:12.5px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.04em}.result-cell .value{font-size:20px;font-weight:800;margin-top:2px;word-break:break-all}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13.5px}.error-box{background:#fef2f2;border:1px solid #fecaca;color:#b91c1c;border-radius:10px;padding:12px 16px;margin-top:14px;font-size:14px}.hint{font-size:13px;color:var(--muted);margin-top:6px}.checkbox-row{display:flex;gap:18px;flex-wrap:wrap;align-items:center;margin:10px 0}.checkbox-row label{display:flex;gap:6px;align-items:center;font-size:14.5px;font-weight:500;color:#334155}table.simple{width:100%;border-collapse:collapse;font-size:14.5px;margin-top:10px}table.simple td,table.simple th{text-align:left;padding:8px 10px;border-bottom:1px solid var(--border)}table.simple th{color:var(--muted);font-size:12.5px;text-transform:uppercase;letter-spacing:.04em}mark{background:#fde68a;border-radius:3px;padding:0 1px}.site-footer{border-top:1px solid var(--border);background:var(--card);margin-top:40px;padding:36px 0}.site-footer .cols{display:flex;flex-wrap:wrap;gap:40px;justify-content:space-between}.site-footer h4{margin:0 0 10px;font-size:14px}.site-footer ul{list-style:none;margin:0;padding:0}.site-footer li{margin-bottom:6px}.site-footer a{color:var(--muted);font-size:14px}.footer-bottom{margin-top:26px;padding-top:18px;border-top:1px solid var(--border);color:var(--muted);font-size:13.5px}@media (max-width:640px){.nav{gap:12px}.nav a{font-size:14px}.tool-box{padding:20px}}