:root{--bg:#f6f8fb;--card:#fff;--text:#142033;--muted:#65748b;--brand:#5b4bff;--brand2:#7c3aed;--border:#e5eaf2;--shadow:0 10px 30px rgba(20,32,51,.07);--ok:#0f8a4b;--danger:#c53030}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--text)}
a{color:inherit;text-decoration:none}.container{width:min(1180px,92%);margin:auto}.nav{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:20}.navin{min-height:68px;display:flex;align-items:center;justify-content:space-between}.logo{font-weight:900;font-size:22px}.logo span{color:var(--brand)}.navlinks{display:flex;gap:22px;color:#445269;font-size:14px}
.hero{padding:72px 0 48px;background:linear-gradient(135deg,#fff,#f1efff)}.hero h1{font-size:clamp(36px,6vw,62px);line-height:1.02;margin:0 0 18px}.hero p{font-size:18px;color:var(--muted);max-width:720px}
.search{margin-top:28px;display:flex;gap:10px;max-width:760px}.search input{flex:1;padding:16px 18px;border:1px solid var(--border);border-radius:12px;font-size:16px;outline:none}.btn{border:0;background:var(--brand);color:#fff;padding:13px 18px;border-radius:10px;font-weight:700;cursor:pointer}.btn.secondary{background:#eef0ff;color:#4437d5}.btn.gray{background:#eef1f5;color:#334155}
.section{padding:44px 0}.section h2{margin:0 0 22px;font-size:28px}.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.card{background:var(--card);border:1px solid var(--border);border-radius:15px;padding:20px;box-shadow:var(--shadow);transition:.2s}.card:hover{transform:translateY(-2px);border-color:#cfd4ff}.card h3{font-size:16px;margin:10px 0 9px}.card p{font-size:13px;color:var(--muted);line-height:1.5;margin:0 0 15px}.tag{display:inline-block;font-size:11px;background:#f0efff;color:#4b3ed5;border-radius:999px;padding:5px 8px}
.toolwrap{padding:48px 0}.toolhead{margin-bottom:22px}.toolhead h1{font-size:40px;margin:10px 0}.toolhead p{color:var(--muted);max-width:850px}.toolbox{background:#fff;border:1px solid var(--border);border-radius:18px;padding:25px;box-shadow:var(--shadow);max-width:920px}.field{margin-bottom:16px}.field label{display:block;font-weight:700;font-size:14px;margin-bottom:7px}.field input,.field textarea,.field select{width:100%;padding:12px 13px;border:1px solid var(--border);border-radius:10px;font:inherit;background:#fff}.field textarea{min-height:180px;resize:vertical}.row{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.actions{display:flex;gap:10px;flex-wrap:wrap}.result{margin-top:20px;padding:18px;border-radius:12px;background:#f7f8fc;border:1px solid var(--border);white-space:pre-wrap;line-height:1.6;min-height:70px}.notice{padding:13px 15px;background:#fff9e8;border:1px solid #f2df9a;border-radius:10px;color:#6d5810;font-size:13px}.formula{margin-top:18px;padding:15px;border-left:4px solid var(--brand);background:#faf9ff;border-radius:8px}.toolinfo{margin-top:28px;display:grid;grid-template-columns:2fr 1fr;gap:18px}.info-card{background:#fff;border:1px solid var(--border);border-radius:15px;padding:20px}.info-card h2{font-size:20px;margin-top:0}.info-card p,.info-card li{color:#526174;line-height:1.7;font-size:14px}.footer{padding:35px 0;border-top:1px solid var(--border);background:#fff;color:var(--muted);font-size:13px}.footin{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}.count{color:var(--muted);font-size:13px;margin-bottom:18px}
@media(max-width:900px){.grid{grid-template-columns:repeat(2,1fr)}.toolinfo{grid-template-columns:1fr}}@media(max-width:600px){.navlinks{display:none}.hero{padding:48px 0 35px}.grid{grid-template-columns:1fr}.row{grid-template-columns:1fr}.search{flex-direction:column}.toolhead h1{font-size:31px}.toolbox{padding:18px}}