:root{--p:#4f46e5;--p2:#7c3aed;--dark:#111827;--gray:#6b7280;--light:#f9fafb;--border:#e5e7eb;--green:#10b981;--r:14px}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--dark);line-height:1.7;background:#fff}
.container{max-width:1100px;margin:0 auto;padding:0 20px}
a{color:var(--p);text-decoration:none}
a:hover{text-decoration:underline}
/* Header */
header{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--border);z-index:50}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-size:1.25rem;font-weight:800;color:var(--dark);text-decoration:none}
.logo span{color:var(--p)}
.nav-links{display:flex;gap:26px;list-style:none}
.nav-links a{color:var(--dark);font-weight:500;font-size:.95rem;text-decoration:none}
.nav-links a:hover{color:var(--p)}
.menu-btn{display:none;background:none;border:none;font-size:1.6rem;cursor:pointer}
/* Hero */
.hero{background:linear-gradient(135deg,#eef2ff 0%,#faf5ff 100%);padding:56px 0 64px;text-align:center}
.hero h1{font-size:2.6rem;font-weight:800;letter-spacing:-.5px;margin-bottom:14px}
.hero p.sub{font-size:1.15rem;color:var(--gray);max-width:720px;margin:0 auto 36px}
/* Tool */
.tool-card{background:#fff;border:1px solid var(--border);border-radius:var(--r);box-shadow:0 10px 40px rgba(79,70,229,.10);max-width:760px;margin:0 auto;padding:34px;text-align:left}
.tabs{display:flex;gap:8px;margin-bottom:22px}
.tab{flex:1;padding:11px;border:1px solid var(--border);background:var(--light);border-radius:9px;font-weight:600;font-size:.95rem;cursor:pointer;text-align:center;color:var(--gray)}
.tab.active{background:var(--p);color:#fff;border-color:var(--p)}
.dropzone{border:2px dashed #c7d2fe;border-radius:var(--r);padding:44px 20px;text-align:center;cursor:pointer;transition:.2s;background:#fafaff}
.dropzone:hover,.dropzone.drag{border-color:var(--p);background:#eef2ff}
.dropzone .dz-icon{font-size:2.6rem;margin-bottom:10px}
.dropzone p{color:var(--gray);font-size:.95rem}
.dropzone strong{color:var(--p)}
.url-box{display:none;gap:10px}
.url-box input{flex:1;padding:13px 16px;border:1px solid var(--border);border-radius:9px;font-size:1rem;outline:none}
.url-box input:focus{border-color:var(--p)}
.btn{display:inline-block;background:linear-gradient(135deg,var(--p),var(--p2));color:#fff;border:none;padding:13px 28px;border-radius:9px;font-size:1rem;font-weight:700;cursor:pointer;text-decoration:none}
.btn:hover{opacity:.92;text-decoration:none}
.preview{display:none;margin-top:22px;text-align:center}
.preview img{max-height:200px;max-width:100%;border-radius:10px;border:1px solid var(--border)}
.status{display:none;margin-top:16px;text-align:center;color:var(--gray);font-weight:500}
.engines{display:none;margin-top:24px}
.engines h3{text-align:center;margin-bottom:14px;font-size:1.05rem}
.engine-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
.engine-btn{display:flex;align-items:center;justify-content:center;gap:8px;padding:13px;border-radius:9px;font-weight:700;color:#fff;text-decoration:none;font-size:.95rem}
.engine-btn:hover{opacity:.9;text-decoration:none}
.eg-google{background:#4285F4}.eg-bing{background:#008373}.eg-yandex{background:#fc3f1d}.eg-tineye{background:#111827}
.privacy-note{margin-top:18px;text-align:center;font-size:.85rem;color:var(--gray)}
/* Sections */
section{padding:56px 0}
section.alt{background:var(--light)}
h2{font-size:1.9rem;font-weight:800;margin-bottom:18px;letter-spacing:-.3px}
h3{font-size:1.25rem;font-weight:700;margin:26px 0 10px}
.center{text-align:center}
p{margin-bottom:16px}
.grid3{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:22px;margin-top:34px}
.card{background:#fff;border:1px solid var(--border);border-radius:var(--r);padding:26px}
.card .ic{font-size:2rem;margin-bottom:12px}
.card h3{margin:0 0 8px;font-size:1.1rem}
.card p{color:var(--gray);font-size:.95rem;margin:0}
.steps{counter-reset:step;margin-top:30px}
.step{display:flex;gap:18px;margin-bottom:26px}
.step-num{flex-shrink:0;width:42px;height:42px;border-radius:50%;background:var(--p);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.1rem}
/* FAQ */
.faq-item{border:1px solid var(--border);border-radius:10px;margin-bottom:12px;background:#fff}
.faq-item summary{padding:16px 20px;font-weight:600;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq-item summary::after{content:"+";font-size:1.4rem;color:var(--p)}
.faq-item[open] summary::after{content:"−"}
.faq-item .faq-a{padding:0 20px 16px;color:var(--gray)}
/* Blog */
.post-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px;margin-top:30px}
.post-card{border:1px solid var(--border);border-radius:var(--r);overflow:hidden;background:#fff;display:flex;flex-direction:column}
.post-card .thumb{height:150px;background:linear-gradient(135deg,var(--p),var(--p2));display:flex;align-items:center;justify-content:center;font-size:3rem}
.post-card .pc-body{padding:20px;flex:1}
.post-card h3{margin:0 0 8px;font-size:1.1rem}
.post-card p{color:var(--gray);font-size:.92rem;margin:0}
.article{max-width:780px;margin:0 auto;padding:46px 20px}
.article h1{font-size:2.2rem;font-weight:800;letter-spacing:-.4px;margin-bottom:10px;line-height:1.3}
.article .meta{color:var(--gray);font-size:.9rem;margin-bottom:30px}
.article h2{font-size:1.5rem;margin-top:38px}
.article ul,.article ol{margin:0 0 16px 24px}
.article li{margin-bottom:8px}
.article img{max-width:100%;border-radius:10px}
.article blockquote{border-left:4px solid var(--p);padding:8px 18px;background:var(--light);border-radius:0 8px 8px 0;margin-bottom:16px;color:var(--gray)}
.cta-box{background:linear-gradient(135deg,#eef2ff,#faf5ff);border:1px solid #c7d2fe;border-radius:var(--r);padding:28px;text-align:center;margin:34px 0}
.cta-box h3{margin-top:0}
table{width:100%;border-collapse:collapse;margin-bottom:20px;font-size:.95rem}
th,td{border:1px solid var(--border);padding:10px 12px;text-align:left}
th{background:var(--light)}
/* Footer */
footer{background:var(--dark);color:#9ca3af;padding:46px 0 26px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1.6fr 1fr;gap:36px;margin-bottom:30px}
.breadcrumbs{font-size:.85rem;color:var(--gray);margin-bottom:18px}
.breadcrumbs a{color:var(--gray)}
footer h4{color:#fff;margin-bottom:12px;font-size:1rem}
footer ul{list-style:none}
footer li{margin-bottom:8px}
footer a{color:#9ca3af;text-decoration:none}
footer a:hover{color:#fff}
.copy{border-top:1px solid #374151;padding-top:20px;text-align:center;font-size:.88rem}
@media(max-width:768px){
.hero h1{font-size:1.9rem}
.nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;padding:18px 22px;border-bottom:1px solid var(--border);gap:14px}
.nav-links.open{display:flex}
.menu-btn{display:block}
.footer-grid{grid-template-columns:1fr}
.tool-card{padding:22px}
}