body{margin:0;font-family:Arial,Helvetica,sans-serif;background:#f6f8fc;color:#172033;line-height:1.6}
header{background:#fff;border-bottom:1px solid #d9e0eb;position:sticky;top:0;z-index:5}
.wrap{max-width:1080px;margin:auto;padding:0 20px}.topbar{display:flex;justify-content:space-between;align-items:center;gap:18px;padding:16px 0;flex-wrap:wrap}
.brand{font-size:1.2rem;font-weight:800;color:#172033;text-decoration:none}nav a{color:#172033;text-decoration:none;margin-left:14px;font-weight:700}
.hero{padding:48px 0 22px;text-align:center}.hero h1{font-size:clamp(2rem,5vw,3.5rem);line-height:1.08;margin:0 0 12px}.hero p{max-width:760px;margin:0 auto;color:#667085;font-size:1.08rem}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;padding:26px 0 50px}.tool-card,.card{background:#fff;border:1px solid #d9e0eb;border-radius:16px;padding:22px;box-shadow:0 8px 22px rgba(16,24,40,.05)}
.tool-card h3{margin:0 0 8px;font-size:1.12rem}.tool-card p{color:#667085;margin:0 0 16px}.tool-card a{display:inline-block;text-decoration:none;font-weight:800;color:#244fd7}
.calc-wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;padding:26px 0 52px}.field{margin-bottom:16px}label{display:block;font-weight:800;margin-bottom:7px}
input,select{width:100%;padding:12px;border:1px solid #b9c2d0;border-radius:9px;font-size:1rem;background:#fff}.row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
button{width:100%;padding:13px 16px;border:0;border-radius:9px;background:#244fd7;color:#fff;font-size:1.02rem;font-weight:800;cursor:pointer}
.result{display:none;margin-top:18px;padding:18px;border-radius:12px;background:#eef3ff}.result strong{font-size:1.35rem}.note{font-size:.92rem;color:#667085}
.content{padding:38px 0}.content h1{line-height:1.2}.content h2{margin-top:30px}.ad-slot{border:1px dashed #aab4c3;background:#fbfcfe;color:#667085;text-align:center;padding:18px;border-radius:10px;margin:20px 0;font-size:.9rem}
footer{margin-top:48px;background:#111827;color:#d0d5dd;padding:30px 0}footer a{color:#fff;text-decoration:none;margin-right:16px}
@media(max-width:800px){.grid{grid-template-columns:1fr 1fr}.calc-wrap{grid-template-columns:1fr}}@media(max-width:560px){.grid,.row{grid-template-columns:1fr}nav a{margin-left:8px}}