:root{
  --bg:#f6f8fb;--card:#fff;--text:#1f2937;--muted:#6b7280;--primary:#2563eb;--primary-700:#1d4ed8;--ring: rgba(37,99,235,.15);
}
*{box-sizing:border-box}html,body{margin:0}
body{font-family:'Roboto',system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
.wrap{max-width:1080px;margin:0 auto;padding:0 16px}
.site-header{position:sticky;top:0;z-index:1000;background:#fff;box-shadow:0 1px 8px rgba(0,0,0,.06)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand-logo{display:inline-grid;place-items:center;width:36px;height:36px;border-radius:10px;background:linear-gradient(180deg,#2563eb,#1d4ed8);color:#fff;font-weight:700}
.brand-text{font-weight:700;color:var(--text)}
.nav{position:relative}.nav-toggle{display:none;border:0;background:transparent;font-size:24px;cursor:pointer}
.nav-links{display:flex;gap:14px;list-style:none;margin:0;padding:0}
.nav-links a{display:block;padding:8px 10px;border-radius:8px;text-decoration:none;color:var(--text);font-weight:500}
.nav-links a:hover{background:var(--bg);color:var(--primary)}
.hero{background:#fff;border-radius:14px;padding:24px;margin:18px 0;display:flex;align-items:center;gap:20px;box-shadow:0 1px 6px rgba(0,0,0,.05)}
.hero-badge{width:48px;height:48px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(180deg,#2563eb,#1d4ed8);color:#fff;font-weight:700}
.hero h1{margin:0 0 6px;font-size:26px}.hero p{margin:0;color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:18px 0}
.card{background:var(--card);border-radius:14px;padding:18px;box-shadow:0 1px 6px rgba(0,0,0,.05);border:1px solid #e5e7eb;display:block;text-decoration:none;color:inherit}
.card:hover{box-shadow:0 4px 16px var(--ring);border-color:#dbeafe}
.card .ic{width:36px;height:36px;border-radius:10px;background:#eff6ff;color:#1d4ed8;display:grid;place-items:center;font-weight:700;margin-bottom:10px}
.card h3{margin:0 0 6px}.card p{margin:0;color:var(--muted);font-size:14px}
.tool{background:#fff;border-radius:14px;padding:18px;margin:18px 0;box-shadow:0 1px 6px rgba(0,0,0,.05);border:1px solid #e5e7eb}
.tool h2{margin-top:0}.row{display:flex;gap:12px;flex-wrap:wrap}.input{flex:1;min-width:220px}
label{display:block;margin-bottom:6px;font-weight:500}input,select,button,textarea{font:inherit}
input[type="date"],input[type="time"],input[type="number"],input[type="text"],select{width:100%;padding:10px 12px;border-radius:10px;border:1px solid #e5e7eb;background:#fff;outline:none}
input:focus{border-color:#bfdbfe;box-shadow:0 0 0 4px var(--ring)}
button.btn{background:var(--primary);color:#fff;border:0;padding:10px 14px;border-radius:10px;cursor:pointer;font-weight:600}
button.btn:hover{background:var(--primary-700)}
.result{background:#f9fafb;border:1px dashed #d1d5db;border-radius:10px;padding:12px;margin-top:10px}
.small{color:var(--muted);font-size:13px}
.site-footer{margin-top:36px;background:#0f172a;color:#cbd5e1;padding:28px 0}
.footer-links{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:6px}
.footer-links a{color:#cbd5e1;text-decoration:none}.footer-links a:hover{color:#fff}
.ad-slot{display:none;border:2px dashed #e5e7eb;border-radius:12px;padding:16px;text-align:center;color:#9ca3af;margin:16px 0}
@media (max-width:960px){.grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.nav-toggle{display:block}.nav-links{display:none;position:absolute;right:0;top:48px;background:#fff;padding:12px;border-radius:12px;box-shadow:0 10px 20px rgba(0,0,0,.1);flex-direction:column;min-width:180px}.nav-links.show{display:flex}.grid{grid-template-columns:1fr}}