:root{--bg:#f7f9fc;--card:#ffffff;--ink:#0f172a;--ink2:#475569;--line:#e2e8f0;
--brand:#4f46e5;--brand2:#7c3aed;--grad:linear-gradient(135deg,#4f46e5,#7c3aed);
--ok:#059669;--radius:16px;--shadow:0 10px 30px rgba(15,23,42,.08)}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--ink);line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1140px;margin:0 auto;padding:0 20px}
h1,h2,h3{line-height:1.2;letter-spacing:-.02em}
h1{font-size:clamp(1.9rem,4.5vw,3rem);font-weight:800}
h2{font-size:clamp(1.4rem,3vw,2rem);font-weight:700}
h3{font-size:1.1rem;font-weight:700}
p{color:var(--ink2)}
.muted{color:var(--ink2)}
/* Header */
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);transition:box-shadow .3s}
header.scrolled{box-shadow:0 4px 20px rgba(15,23,42,.08)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:1.15rem;color:var(--ink)}
.logo:hover{text-decoration:none}
.logo svg{width:30px;height:30px}
.logo b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.navlinks{display:flex;align-items:center;gap:26px}
.navlinks a{color:var(--ink2);font-weight:500;font-size:.95rem}
.navlinks a:hover{color:var(--brand);text-decoration:none}
.has-drop{position:relative}
.drop{display:none;position:absolute;top:100%;left:-10px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);min-width:230px;padding:8px;flex-direction:column;gap:2px}
.has-drop:hover .drop{display:flex}
.drop a{padding:9px 12px;border-radius:8px;font-size:.9rem}
.drop a:hover{background:#f1f5f9;text-decoration:none}
.burger{display:none;background:none;border:0;cursor:pointer;padding:8px}
.burger span{display:block;width:22px;height:2px;background:var(--ink);margin:5px 0;transition:.3s}
.mobilemenu{display:none;flex-direction:column;gap:4px;background:#fff;border-top:1px solid var(--line);padding:12px 20px 18px}
.mobilemenu.open{display:flex}
.mobilemenu a{padding:10px 4px;color:var(--ink);font-weight:500;border-bottom:1px solid #f1f5f9}
/* Hero */
.hero{background:radial-gradient(1200px 500px at 70% -10%,rgba(124,58,237,.14),transparent),radial-gradient(900px 400px at 10% 10%,rgba(79,70,229,.12),transparent),var(--bg);padding:72px 0 56px;text-align:center}
.hero .badge{display:inline-flex;align-items:center;gap:6px;background:#eef2ff;color:var(--brand);font-size:.8rem;font-weight:600;padding:6px 14px;border-radius:999px;margin-bottom:18px}
.hero p.lead{max-width:720px;margin:16px auto 26px;font-size:1.08rem}
.cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 26px;border-radius:12px;font-weight:600;font-size:.98rem;border:0;cursor:pointer;transition:transform .15s,box-shadow .15s}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn-p{background:var(--grad);color:#fff;box-shadow:0 8px 20px rgba(79,70,229,.35)}
.btn-g{background:#fff;color:var(--ink);border:1px solid var(--line)}
.stats{display:flex;gap:36px;justify-content:center;flex-wrap:wrap;margin-top:40px}
.stat b{font-size:1.5rem;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{display:block;font-size:.82rem;color:var(--ink2)}
/* Sections */
section{padding:60px 0}
.sec-head{text-align:center;max-width:680px;margin:0 auto 40px}
.sec-head p{margin-top:10px}
.grid{display:grid;gap:20px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:transform .2s,box-shadow .2s;display:block;color:var(--ink)}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);text-decoration:none}
.card .ic{width:46px;height:46px;border-radius:12px;background:#eef2ff;display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.card .ic svg{width:24px;height:24px;stroke:var(--brand);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.card h3{margin-bottom:6px}
.card p{font-size:.92rem}
.card .go{margin-top:12px;font-size:.88rem;font-weight:600;color:var(--brand)}
.steps{counter-reset:s}
.step{position:relative;padding-left:64px}
.step::before{counter-increment:s;content:counter(s);position:absolute;left:0;top:0;width:44px;height:44px;border-radius:12px;background:var(--grad);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:1.1rem}
/* Tool */
.toolbox{background:var(--card);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:34px;max-width:860px;margin:0 auto}
.dropzone{border:2px dashed #c7d2fe;border-radius:14px;background:#f8faff;padding:44px 20px;text-align:center;cursor:pointer;transition:.2s}
.dropzone:hover,.dropzone.over{border-color:var(--brand);background:#eef2ff}
.dropzone svg{width:46px;height:46px;stroke:var(--brand);fill:none;stroke-width:1.6;margin:0 auto 10px}
.dropzone b{display:block;font-size:1.05rem}
.dropzone span{font-size:.86rem;color:var(--ink2)}
.opts{display:flex;gap:18px;flex-wrap:wrap;margin:18px 0;align-items:center;font-size:.92rem;color:var(--ink2)}
.opts label{display:flex;gap:7px;align-items:center;cursor:pointer}
select,input[type=text]{padding:9px 12px;border:1px solid var(--line);border-radius:10px;font:inherit;font-size:.9rem;background:#fff}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.progress{height:8px;background:#e2e8f0;border-radius:99px;overflow:hidden;margin:16px 0;display:none}
.progress i{display:block;height:100%;width:0;background:var(--grad);border-radius:99px;transition:width .25s}
.status{font-size:.88rem;color:var(--ink2);min-height:22px}
.status.ok{color:var(--ok);font-weight:600}
.actions{display:flex;gap:12px;margin-top:16px;flex-wrap:wrap}
.note{margin-top:16px;background:#f0fdf4;border:1px solid #bbf7d0;color:#166534;font-size:.85rem;padding:12px 16px;border-radius:12px}
/* FAQ */
details{background:var(--card);border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden}
summary{padding:16px 20px;font-weight:600;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
summary::after{content:"+";font-size:1.3rem;color:var(--brand);font-weight:400}
details[open] summary::after{content:"–"}
details p{padding:0 20px 16px;font-size:.94rem}
/* Ad slots */
.ad-slot{max-width:860px;margin:34px auto;text-align:center}
.ad-slot .lbl{font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:#94a3b8;margin-bottom:6px}
.ad-box{border:1px dashed #cbd5e1;border-radius:10px;background:#fff;padding:14px;font-size:.8rem;color:#94a3b8;min-height:96px;display:flex;align-items:center;justify-content:center}
/* Footer */
footer{background:#0f172a;color:#cbd5e1;padding:56px 0 26px;margin-top:40px}
footer h4{color:#fff;font-size:.95rem;margin-bottom:14px}
footer a{color:#94a3b8;font-size:.9rem;display:block;padding:4px 0}
footer a:hover{color:#fff;text-decoration:none}
.fgrid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px}
.fbottom{border-top:1px solid #1e293b;margin-top:36px;padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:.83rem;color:#64748b}
.pagehead{background:radial-gradient(900px 380px at 70% -10%,rgba(124,58,237,.14),transparent),var(--bg);padding:56px 0 40px;text-align:center}
.pagehead p{max-width:700px;margin:12px auto 0}
.crumb{font-size:.82rem;color:var(--ink2);margin-bottom:14px}
.crumb a{color:var(--ink2)}
.prose p{margin-bottom:14px;font-size:.96rem}
.prose h2{margin:26px 0 12px}
.prose ul{margin:0 0 14px 22px;color:var(--ink2);font-size:.95rem}
.prose li{margin-bottom:6px}
@media(max-width:900px){.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(2,1fr)}.fgrid{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.grid-4,.grid-3,.grid-2{grid-template-columns:1fr}.navlinks{display:none}.burger{display:block}.toolbox{padding:22px}.hero{padding:52px 0 44px}}

/* Article content */
.prose h3{font-size:1.05rem;margin:18px 0 8px}
.prose ol{margin:0 0 14px 22px;color:var(--ink2);font-size:.95rem}
.prose ol li{margin-bottom:8px}
.prose strong{color:var(--ink)}
.tw{overflow-x:auto;margin:0 0 16px}
.prose table{width:100%;border-collapse:collapse;font-size:.92rem;background:#fff}
.prose th,.prose td{border:1px solid var(--line);padding:9px 12px;text-align:left;color:var(--ink2)}
.prose th{background:#eef2ff;color:var(--ink)}
.toc{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin-bottom:22px;font-size:.9rem}
.toc ul{margin:8px 0 0 18px}
.toc li{margin-bottom:3px}
.prose h2[id]{scroll-margin-top:84px}
.has-drop:focus-within .drop{display:flex}
.dropzone:focus-visible{outline:3px solid var(--brand);outline-offset:3px}

.langbtn{margin-top:10px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 16px;font:inherit;font-size:.85rem;font-weight:600;cursor:pointer;color:var(--ink)}
.langbtn:hover{border-color:var(--brand)}
.actions a.btn{text-decoration:none}

[hidden]{display:none!important}
.opts .cust input{width:72px;padding:6px 8px;border:1px solid var(--line);border-radius:8px;font:inherit}
.opts label.chk{display:flex;align-items:center;gap:8px;font-size:.88rem}
.opts label.chk input{width:auto}

/* ---- Responsive, touch and accessibility hardening ---- */
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
img,svg,video{max-width:100%}
.prose,.prose p,.prose li,.prose a,footer a,.note,.status{overflow-wrap:anywhere}
.opts select{max-width:100%;min-width:0}
.opts label.chk input{width:20px;height:20px;flex:none}
.opts .cust input{min-height:40px}
.crumb a{display:inline-block;padding:10px 4px}
.navlinks a{padding:10px 8px}
select,input,textarea,.btn{min-height:44px}
.btn{justify-content:center}
details summary{min-height:44px;padding-top:12px;padding-bottom:12px}
:focus-visible{outline:3px solid var(--brand);outline-offset:2px}
@media(max-width:900px){.opts{gap:14px}}
@media(max-width:640px){
  .fgrid{grid-template-columns:1fr;gap:22px}
  footer a{padding:11px 0}
  .opts{flex-direction:column;align-items:stretch}
  .opts label{justify-content:space-between;flex-wrap:wrap}
  .opts label select{flex:1 1 180px}
  .opts label.chk{justify-content:flex-start}
  .actions{display:flex;flex-direction:column;gap:10px}
  .actions .btn{width:100%}
  .langbtn{min-height:44px}
  .toolbox{padding:18px}
  .dropzone{padding:34px 14px}
  .tw{-webkit-overflow-scrolling:touch}
}
@media(max-width:360px){.wrap{padding-left:14px;padding-right:14px}h1{font-size:1.7rem}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.logo,header .logo{display:inline-flex;align-items:center;min-height:44px}
footer a{padding:10px 0;min-height:40px}
@media(max-width:640px){
  .opts label:not(.chk){flex-direction:column;align-items:stretch;gap:6px}
  .opts label select{flex:none;width:100%}
  .opts label.chk{flex-direction:row;flex-wrap:nowrap;align-items:center;min-height:44px}
}
.opts label.chk input{min-height:0}