:root{--bg:#fff;--surface:#f7f8fa;--text:#1a1a2e;--muted:#5b6472;--primary:#4f46e5;--primary-d:#4338ca;--border:#e6e8ec;--radius:14px;--shadow:0 4px 20px rgba(0,0,0,.06);--max:1180px;--font:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif}
[data-theme="dark"]{--bg:#0f1117;--surface:#171a23;--text:#e8eaf0;--muted:#9aa3b2;--primary:#7c74ff;--primary-d:#6a61f0;--border:#262a36;--shadow:0 4px 24px rgba(0,0,0,.4)}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:var(--font);line-height:1.6}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}
.header{position:sticky;top:0;z-index:50;background:var(--bg);border-bottom:1px solid var(--border);backdrop-filter:blur(8px)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-weight:800;font-size:1.25rem;color:var(--text)}
.logo span{color:var(--primary)}
.nav-links{display:flex;gap:24px;align-items:center}
.nav-links a{color:var(--muted);font-weight:500}
.nav-links a:hover{color:var(--text)}
.theme-btn{background:var(--surface);border:1px solid var(--border);border-radius:50%;width:40px;height:40px;cursor:pointer;font-size:1.1rem;color:var(--text)}
.burger{display:none;background:none;border:0;font-size:1.5rem;color:var(--text);cursor:pointer}
.hero{padding:72px 0 48px;text-align:center;background:radial-gradient(900px 400px at 50% -10%,rgba(79,70,229,.12),transparent)}
.hero h1{font-size:clamp(2rem,5vw,3.2rem);font-weight:800;letter-spacing:-.02em}
.hero p{color:var(--muted);font-size:1.15rem;max-width:620px;margin:16px auto 28px}
.search{display:flex;max-width:560px;margin:0 auto;background:var(--surface);border:1px solid var(--border);border-radius:50px;padding:6px}
.search input{flex:1;border:0;background:none;padding:12px 18px;font-size:1rem;color:var(--text);outline:none}
.btn{background:var(--primary);color:#fff;border:0;border-radius:40px;padding:12px 24px;font-weight:600;cursor:pointer}
.btn:hover{background:var(--primary-d)}
.section{padding:48px 0}
.section h2{font-size:1.8rem;font-weight:800;margin-bottom:6px}
.section .sub{color:var(--muted);margin-bottom:28px}
.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:26px}
.chip{background:var(--surface);border:1px solid var(--border);color:var(--muted);padding:8px 16px;border-radius:30px;cursor:pointer;font-size:.9rem;font-weight:500}
.chip.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.grid{display:grid;gap:24px;grid-template-columns:repeat(3,1fr)}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:32px 28px;box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s;min-height:200px;display:flex;flex-direction:column}
.card:hover{transform:translateY(-6px);box-shadow:0 12px 32px rgba(79,70,229,.16);border-color:var(--primary)}
.card .icon{width:60px;height:60px;border-radius:16px;display:grid;place-items:center;background:rgba(79,70,229,.12);color:var(--primary);font-size:1.9rem;margin-bottom:18px}
.card h3{font-size:1.25rem;margin-bottom:10px}
.card p{color:var(--muted);font-size:.98rem}
.card .go{margin-top:auto;padding-top:14px;color:var(--primary);font-weight:600;font-size:.92rem}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin:8px 0 8px}
.stat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px;text-align:center}
.stat b{display:block;font-size:2rem;font-weight:800;color:var(--primary)}
.stat span{color:var(--muted);font-size:.95rem}
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature{padding:26px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface)}
.feature .icon{font-size:1.8rem;margin-bottom:12px}
.feature h3{font-size:1.15rem;margin-bottom:8px}
.feature p{color:var(--muted);font-size:.95rem}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;counter-reset:step}
.step{padding:26px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);position:relative}
.step::before{counter-increment:step;content:counter(step);position:absolute;top:-16px;left:24px;width:36px;height:36px;border-radius:50%;background:var(--primary);color:#fff;display:grid;place-items:center;font-weight:800}
.step h3{margin:8px 0;font-size:1.1rem}
.step p{color:var(--muted);font-size:.95rem}
.ad-slot{background:var(--surface);border:1px dashed var(--border);border-radius:10px;min-height:90px;display:grid;place-items:center;color:var(--muted);font-size:.8rem;margin:24px 0}
.faq details{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:16px 18px;margin-bottom:12px}
.faq summary{font-weight:600;cursor:pointer}
.faq p{color:var(--muted);margin-top:10px}
.testimonials{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.tcard{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px}
.tcard p{color:var(--muted)}
.tcard b{display:block;margin-top:12px;color:var(--text)}
.newsletter{background:rgba(79,70,229,.1);border-radius:var(--radius);padding:32px;text-align:center;margin:32px 0}
.newsletter form{display:flex;max-width:420px;margin:16px auto 0;gap:8px}
.newsletter input{flex:1;padding:12px 14px;border:1px solid var(--border);border-radius:30px;background:var(--bg);color:var(--text)}
.footer{background:var(--surface);border-top:1px solid var(--border);padding:48px 0 24px;margin-top:48px}
.footer-grid{display:grid;gap:28px;grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}
.footer h4{margin-bottom:12px}
.footer a{color:var(--muted);display:block;margin-bottom:8px;font-size:.92rem}
.footer .copy{text-align:center;color:var(--muted);margin-top:32px;font-size:.85rem}
.breadcrumb{font-size:.85rem;color:var(--muted);padding:18px 0}
.breadcrumb a{color:var(--muted)}
.tool-wrap{display:grid;grid-template-columns:1fr 300px;gap:32px}
.tool-box{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px}
.field{margin-bottom:16px}
.field label{display:block;font-weight:600;margin-bottom:6px;font-size:.9rem}
.field input,.field select,.field textarea{width:100%;padding:11px 14px;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--text);font-size:1rem}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.result{margin-top:18px;padding:18px;border-radius:10px;background:rgba(79,70,229,.1);font-size:1.3rem;font-weight:700;text-align:center}
.share{display:flex;gap:10px;margin:20px 0}
.share a{background:var(--surface);border:1px solid var(--border);padding:8px 14px;border-radius:30px;font-size:.85rem}
.prose{margin-top:8px}
.prose h2{margin:28px 0 10px;font-size:1.4rem}
.prose p,.prose li{color:var(--muted);margin-bottom:8px}
.prose ul,.prose ol{padding-left:20px}
@media(max-width:960px){.grid{grid-template-columns:repeat(2,1fr)}.stats{grid-template-columns:repeat(2,1fr)}.features,.steps{grid-template-columns:1fr}}
@media(max-width:860px){
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:var(--bg);border-bottom:1px solid var(--border);box-shadow:var(--shadow);padding:8px 0}
  .nav-links.open{display:flex}
  .nav-links a{padding:14px 20px;border-bottom:1px solid var(--border)}
  .nav-links a:last-child{border-bottom:0}
  .nav-links .theme-btn{margin:12px 20px}
  .burger{display:block}
  .header{position:relative}
  .tool-wrap{grid-template-columns:1fr}
  .row2{grid-template-columns:1fr}
  .hero{padding:48px 0 36px}
  .search{flex-wrap:nowrap}
}
@media(max-width:600px){
  .grid{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .container{padding:0 16px}
  .section{padding:32px 0}
  .newsletter form{flex-direction:column}
  .newsletter input{width:100%}
  .search input{font-size:.95rem}
}