:root{--brand:#1d4ed8;--brand-dark:#1e40af;--soft:#eef4ff;--accent:#f59e0b;--ink:#0f172a;--text:#374151;--muted:#64748b;--line:#e2e8f0;--bg:#f8fafc}
*{box-sizing:border-box}
body{margin:0;font-family:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);line-height:1.65;background:#fff;-webkit-font-smoothing:antialiased}
a{color:var(--brand-dark)}
.nav{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--line);z-index:50}
.nav .wrap{max-width:1100px;margin:0 auto;padding:14px 16px;display:flex;align-items:center;justify-content:space-between}
.brand{font-weight:900;color:var(--ink);text-decoration:none;font-size:20px;letter-spacing:-.5px}
.brand em{color:var(--brand);font-style:normal}
.nav a.more{font-size:14px;color:var(--brand-dark);text-decoration:none;font-weight:700}
.blog-hero{padding:68px 0 52px;background:linear-gradient(135deg,#0b2a6b 0%,#1e40af 55%,#3b82f6 100%);color:#fff;text-align:center;position:relative;overflow:hidden}
.blog-hero::before{content:"";position:absolute;top:-80px;right:-80px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.16),transparent 70%)}
.blog-hero h1{font-size:34px;font-weight:900;letter-spacing:-.03em;margin:0;position:relative;z-index:1}
.blog-hero p{font-size:15px;color:rgba(255,255,255,.72);margin:10px auto 0;max-width:640px;position:relative;z-index:1}
.blog-search{max-width:560px;margin:-24px auto 0;position:relative;z-index:2;padding:0 16px}
.blog-search-inner{display:flex;background:#fff;border-radius:14px;box-shadow:0 8px 30px rgba(0,0,0,.12);overflow:hidden;border:1px solid var(--line)}
.blog-search input{flex:1;border:none;padding:14px 18px;font-size:14px;font-weight:500;outline:none;font-family:inherit;color:var(--ink)}
.blog-search button{background:var(--brand);color:#fff;border:none;padding:14px 24px;font-weight:700;font-size:14px;cursor:pointer;font-family:inherit}
.blog-search button:hover{background:var(--brand-dark)}
.blog-grid{padding:48px 0 64px;background:var(--bg)}
.blog-container{max-width:1100px;margin:0 auto;padding:0 16px}
.blog-list{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.blog-featured{grid-column:1/-1}
.blog-card{background:#fff;border-radius:16px;overflow:hidden;border:1px solid var(--line);box-shadow:0 2px 8px rgba(15,23,42,.04);transition:all .25s ease;height:100%;display:flex;flex-direction:column}
.blog-card:hover{transform:translateY(-4px);box-shadow:0 12px 32px rgba(15,23,42,.1);border-color:rgba(29,78,216,.25)}
.blog-card-img{width:100%;height:200px;overflow:hidden;position:relative;background:var(--soft)}
.blog-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.blog-card:hover .blog-card-img img{transform:scale(1.05)}
.blog-card-body{padding:20px;flex:1;display:flex;flex-direction:column}
.blog-card-cat{display:inline-block;background:rgba(29,78,216,.09);color:var(--brand-dark);font-size:11px;font-weight:700;padding:4px 12px;border-radius:999px;margin-bottom:10px;width:fit-content;border:1px solid rgba(29,78,216,.15)}
.blog-card-title{font-size:16px;font-weight:800;color:var(--ink);line-height:1.35;margin:0 0 8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.blog-card-title a{color:inherit;text-decoration:none}
.blog-card-title a:hover{color:var(--brand-dark)}
.blog-card-excerpt{text-align:justify;hyphens:auto;font-size:13px;color:var(--muted);line-height:1.6;flex:1;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin:0}
.blog-card-meta{display:flex;gap:12px;flex-wrap:wrap;font-size:12px;color:#94a3b8;margin-top:12px;padding-top:12px;border-top:1px solid #f1f5f9}
.blog-card-meta i{color:var(--brand);margin-right:3px}
.blog-featured .blog-card{display:grid;grid-template-columns:1fr 1fr}
.blog-featured .blog-card-img{height:100%;min-height:280px}
.blog-featured .blog-card-body{padding:28px;justify-content:center}
.blog-featured .blog-card-title{font-size:22px;-webkit-line-clamp:3}
.blog-featured .blog-card-excerpt{-webkit-line-clamp:3;font-size:14px}
.blog-empty{grid-column:1/-1;text-align:center;padding:60px 20px;color:#94a3b8}
.blog-empty i{font-size:44px;display:block;margin-bottom:14px;color:#cbd5e1}
main.article{max-width:820px;margin:0 auto;padding:0 16px 40px}
.article-body{--ink:#0f172a}
.art-head{padding:42px 0 0}
.crumb{font-size:13px;color:var(--muted);margin-bottom:16px}
.crumb a{color:var(--muted);text-decoration:none}
.art-cat{display:inline-block;background:rgba(29,78,216,.09);color:var(--brand-dark);font-size:12px;font-weight:700;padding:5px 14px;border-radius:999px;margin-bottom:14px;border:1px solid rgba(29,78,216,.15)}
h1.art-title{font-size:36px;font-weight:900;letter-spacing:-.02em;line-height:1.2;color:var(--ink);margin:0 0 14px}
.art-meta{display:flex;gap:16px;flex-wrap:wrap;font-size:13px;color:#94a3b8;margin-bottom:24px}
.art-meta i{color:var(--brand);margin-right:4px}
.art-hero{width:100%;height:auto;border-radius:16px;margin:0 0 28px;display:block}
.article-body p{margin:0 0 16px}
.article-body h2{font-size:25px;font-weight:800;color:var(--ink);margin:36px 0 12px;letter-spacing:-.01em}
.article-body h3{font-size:19px;font-weight:700;color:var(--ink);margin:26px 0 8px}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:22px}
.article-body li{margin:6px 0}
.article-body img{max-width:100%;border-radius:10px}
.article-body a{font-weight:600}
.faq{margin:40px 0;border-top:1px solid var(--line);padding-top:22px}
.faq h2{font-size:24px;font-weight:800;margin:0 0 14px}
.faq details{border:1px solid var(--line);border-radius:10px;padding:13px 16px;margin-bottom:10px}
.faq summary{font-weight:700;color:var(--ink);cursor:pointer}
.faq p{margin:8px 0 0;color:var(--muted);font-size:14.5px}
.cta{background:var(--soft);border-radius:14px;padding:26px;margin:36px 0;text-align:center}
.cta h3{margin:0 0 8px;color:var(--ink)}
.btn{display:inline-block;background:var(--brand);color:#fff;text-decoration:none;font-weight:700;padding:12px 24px;border-radius:999px;margin:6px 6px 0}
.btn.light{background:#fff;color:var(--brand-dark);border:1px solid var(--brand)}
.disc{font-size:12.5px;color:var(--muted);border-top:1px solid var(--line);margin-top:36px;padding-top:16px}
.foot{border-top:1px solid var(--line);text-align:center;padding:24px;color:var(--muted);font-size:13px;background:#fff}
.cta-band{background:linear-gradient(135deg,#1e40af,#3b82f6);color:#fff;text-align:center;padding:46px 0}
.cta-band h2{color:#fff;margin:0 0 8px;font-size:24px;font-weight:800}
.cta-band p{color:rgba(255,255,255,.85);margin:0 0 18px}
.btn-white{display:inline-block;background:#fff;color:#1e40af;text-decoration:none;font-weight:800;padding:13px 26px;border-radius:999px}
.btn-white:hover{background:#eef4ff}
.wa-float{position:fixed;right:18px;bottom:18px;z-index:60;background:#25D366;color:#fff;text-decoration:none;font-weight:800;padding:12px 18px;border-radius:999px;box-shadow:0 10px 26px -8px rgba(37,211,102,.7);display:inline-flex;align-items:center;gap:8px;font-size:14px}
.wa-float:hover{background:#1ebe5b}
@media(max-width:991px){.blog-list{grid-template-columns:repeat(2,1fr)}.blog-featured .blog-card{grid-template-columns:1fr}.blog-featured .blog-card-img{height:220px;min-height:0}.blog-featured .blog-card-title{font-size:18px}}
@media(max-width:680px){.blog-list{grid-template-columns:1fr;gap:16px}.blog-hero{padding:56px 0 40px}.blog-hero h1{font-size:24px}h1.art-title{font-size:26px}.blog-featured .blog-card-title{font-size:17px}.blog-card-img{height:180px}}

/* Category filter chips (fix) */
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 22px}
.chip{display:inline-block;padding:7px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--text);font-size:13px;font-weight:600;text-decoration:none;transition:all .2s ease}
.chip:hover{border-color:var(--brand);color:var(--brand-dark);transform:translateY(-1px)}
.chip.on{background:var(--brand);border-color:var(--brand);color:#fff}
@media(max-width:600px){.chips{gap:6px}.chip{padding:6px 12px;font-size:12px}}

/* SEO product hubs */
.hub-intro{max-width:820px;margin:0 auto 24px;font-size:15.5px;line-height:1.75;color:var(--text)}
.hub-intro p{margin:0 0 14px}
.hub-intro ul{margin:0 0 16px;padding-left:22px}
.hub-intro li{margin:6px 0}
.hub-actions{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin:0 0 30px}
.hub-actions .btn{margin:0}
.hub-section-title{font-size:24px;font-weight:800;color:var(--ink);margin:0 0 4px;letter-spacing:-.01em}
.hub-count{font-size:13px;color:var(--muted);margin:0 0 16px}
.hub-related{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:26px 0 0;font-size:13.5px;color:var(--muted)}
.hub-related a{display:inline-block;padding:7px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--brand-dark);font-weight:700;text-decoration:none}
.hub-related a:hover{border-color:var(--brand)}
.hub-link{font-size:13.5px;color:var(--muted);margin:18px 0 0}
@media(max-width:680px){.hub-intro{font-size:15px}.hub-actions .btn{width:100%;text-align:center}}