:root{--bg:#f6f8fb;--card:#fff;--text:#172033;--muted:#687386;--brand:#4f46e5;--border:#e5e9f0;--shadow:0 10px 30px rgba(20,30,55,.07)}
*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text);line-height:1.6}a{color:inherit;text-decoration:none}.container{max-width:1080px;margin:auto;padding:0 20px}
header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}.nav{height:64px;display:flex;align-items:center;justify-content:space-between}.brand{font-weight:800;font-size:20px}.brand span{color:var(--brand)}.navlinks{display:flex;gap:20px;color:var(--muted);font-size:14px}
.hero{text-align:center;padding:72px 0 42px}.hero h1{font-size:clamp(34px,6vw,58px);line-height:1.05;margin:0 0 18px;letter-spacing:-1.5px}.hero p{max-width:680px;margin:auto;color:var(--muted);font-size:18px}
.search{margin:28px auto 0;max-width:600px}.search input{width:100%;padding:16px 18px;border:1px solid var(--border);border-radius:14px;font-size:16px;box-shadow:var(--shadow)}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;padding:20px 0 60px}.card{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:22px;box-shadow:var(--shadow);transition:.2s}.card:hover{transform:translateY(-2px)}.card h3{margin:4px 0 7px}.card p{color:var(--muted);margin:0;font-size:14px}.icon{font-size:28px}
.tool-wrap{max-width:760px;margin:50px auto 80px}.tool-head{text-align:center;margin-bottom:28px}.tool-head h1{font-size:40px;margin:0 0 8px}.tool-head p{color:var(--muted)}.tool{background:#fff;border:1px solid var(--border);border-radius:20px;padding:28px;box-shadow:var(--shadow)}label{display:block;font-weight:650;margin:12px 0 6px}input,textarea,select{width:100%;padding:12px 14px;border:1px solid #d9deea;border-radius:10px;font:inherit;background:#fff}textarea{min-height:180px;resize:vertical}.row{display:grid;grid-template-columns:1fr 1fr;gap:14px}.btn{border:0;background:var(--brand);color:#fff;padding:12px 18px;border-radius:10px;font-weight:700;cursor:pointer;margin-top:16px}.result{margin-top:20px;padding:18px;border-radius:12px;background:#f0f2ff;font-size:18px}.result strong{font-size:28px}.hint{font-size:13px;color:var(--muted);margin-top:8px}.content{margin-top:35px}.content h2{margin-top:30px}.content p,.content li{color:#4e596b}
footer{border-top:1px solid var(--border);padding:30px 0;color:var(--muted);font-size:13px;text-align:center}
@media(max-width:760px){.grid{grid-template-columns:1fr}.row{grid-template-columns:1fr}.navlinks{display:none}.hero{padding-top:48px}.tool-head h1{font-size:32px}}

.sponsored{margin:22px auto 0;display:flex;align-items:center;justify-content:center;gap:10px;font-size:13px}.sponsored span{color:var(--muted)}.sponsored a{display:inline-block;padding:9px 14px;border:1px solid var(--border);border-radius:9px;background:#fff;color:var(--brand);font-weight:700;box-shadow:var(--shadow)}.sponsored a:hover{transform:translateY(-1px)}

.ad-banner{margin:24px auto;text-align:center;min-height:60px;overflow:hidden}.ad-script{margin:20px auto;text-align:center;overflow:hidden}