:root{
  --bg:#f7f8fc;--card:#ffffff;--ink:#172033;--muted:#5d687c;--brand:#3157d5;--brand2:#19a7ce;--border:#dfe4ef;--good:#107c41;--warn:#b56b00;
  --shadow:0 14px 35px rgba(23,32,51,.08);--radius:18px;
}
*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.6}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}.site-header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}.nav{max-width:1120px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:16px 20px}.logo{font-weight:800;color:var(--ink);font-size:1.15rem}.nav-links{display:flex;gap:18px;flex-wrap:wrap}.nav-links a{color:var(--muted);font-weight:650;font-size:.95rem}.hero{background:linear-gradient(135deg,#243b9f,#19a7ce);color:#fff}.hero-inner{max-width:1120px;margin:auto;padding:72px 20px}.hero h1{font-size:clamp(2.2rem,5vw,4.4rem);line-height:1.05;margin:0 0 18px}.hero p{font-size:1.2rem;max-width:720px;margin:0 0 28px;color:rgba(255,255,255,.9)}.btn{display:inline-block;background:#fff;color:#243b9f;font-weight:800;padding:12px 18px;border-radius:999px}.container{max-width:1120px;margin:auto;padding:38px 20px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}.tool-card h3{margin:0 0 8px}.tool-card p{margin:0;color:var(--muted)}.tool-wrap{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:24px;align-items:start}.tool-panel{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}.sidebar{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px;position:sticky;top:86px}.sidebar ul{margin:0;padding-left:18px}.tool-title{margin-top:0;font-size:clamp(2rem,4vw,3.2rem);line-height:1.1}.muted{color:var(--muted)}label{display:block;font-weight:750;margin:14px 0 6px}input,select,textarea{width:100%;padding:12px 13px;border:1px solid var(--border);border-radius:12px;font-size:1rem;background:#fff}button,.calc-btn{border:0;background:var(--brand);color:#fff;border-radius:12px;padding:12px 16px;font-weight:800;font-size:1rem;cursor:pointer;margin-top:16px}button:hover,.calc-btn:hover{filter:brightness(.95)}.result{margin-top:18px;padding:18px;border-radius:14px;background:#f0f5ff;border:1px solid #ccdafc;font-weight:750}.result small{display:block;color:var(--muted);font-weight:500;margin-top:6px}.row{display:grid;grid-template-columns:1fr 1fr;gap:14px}.faq{margin-top:28px}.faq details{background:#fff;border:1px solid var(--border);border-radius:14px;margin:10px 0;padding:14px}.footer{margin-top:50px;background:#101827;color:#cdd5e5}.footer-inner{max-width:1120px;margin:auto;padding:26px 20px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}.footer a{color:#fff}.pill{display:inline-block;background:#eaf0ff;color:#3157d5;border-radius:999px;padding:4px 10px;font-weight:800;font-size:.82rem}.note{border-left:4px solid var(--brand2);padding:10px 14px;background:#eefaff;border-radius:8px;color:#334}.list-clean{list-style:none;padding:0;margin:0}.list-clean li{padding:6px 0;border-bottom:1px solid var(--border)}@media(max-width:860px){.tool-wrap{grid-template-columns:1fr}.sidebar{position:static}.row{grid-template-columns:1fr}.nav{align-items:flex-start;gap:10px;flex-direction:column}.hero-inner{padding:52px 20px}}