:root{--blue:#2563eb;--purple:#9333ea;--ink:#111827;--text:#374151;--muted:#6b7280;--line:#e5e7eb;--bg:#f3f4f6;--r:16px}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body.ns{margin:0;background:var(--bg);color:var(--text);font:400 17px/1.7 ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
a{color:var(--blue)}
a:hover{color:var(--purple)}
img{max-width:100%;height:auto;display:block}
h1,h2,h3,h4{color:var(--ink);line-height:1.2;margin:0 0 .5em;font-weight:800;letter-spacing:-.02em}
h1{font-size:clamp(32px,4.6vw,56px)}
h2{font-size:clamp(23px,2.6vw,30px)}
h3{font-size:18px;font-weight:700}
.ns-in{max-width:1180px;margin:0 auto;padding:0 24px}
.ns-narrow{max-width:780px}
.ns-skip{position:absolute;left:-999px}.ns-skip:focus{left:10px;top:10px;background:#fff;padding:8px;z-index:99}
.ns-head{background:rgba(255,255,255,.92);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10;backdrop-filter:saturate(1.4) blur(8px)}
.ns-bar{display:flex;align-items:center;justify-content:space-between;gap:20px;height:66px}
.ns-brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;font-size:18px;letter-spacing:-.01em}
.ns-brand em{font-style:normal;font-size:11px;font-weight:700;color:var(--purple);background:#f3e8ff;border:1px solid #e9d5ff;border-radius:999px;padding:1px 8px}
.ns-mark{width:16px;height:28px}
.ns-mark rect{fill:none;stroke:var(--blue);stroke-width:2}
.ns-mark path{fill:var(--purple)}
.ns-nav{display:flex;align-items:center;gap:22px}
.ns-nav a{color:var(--text);text-decoration:none;font-size:15px;font-weight:500}
.ns-nav a:hover,.ns-nav a[aria-current]{color:var(--blue)}
.ns-cta{background:var(--ink);color:#fff!important;padding:8px 16px;border-radius:999px}
.ns-cta:hover{background:var(--blue)}
.ns-burger{display:none;background:none;border:0;padding:8px;cursor:pointer}
.ns-burger i{display:block;width:22px;height:2px;background:var(--ink);margin:6px 0;border-radius:2px}
/* gradient hero */
.ns-hero{background:radial-gradient(circle at 15% 20%,rgba(37,99,235,.16),transparent 45%),radial-gradient(circle at 85% 30%,rgba(147,51,234,.16),transparent 45%),#fff;padding:90px 0 80px;text-align:center;border-bottom:1px solid var(--line)}
.ns-hero h1 span{background:linear-gradient(90deg,var(--blue),var(--purple));-webkit-background-clip:text;background-clip:text;color:transparent}
.ns-badge{display:inline-block;font-size:13px;font-weight:600;color:var(--purple);background:#f3e8ff;border:1px solid #e9d5ff;border-radius:999px;padding:4px 14px;margin:0 0 22px}
.ns-lead{font-size:19px;color:var(--muted);max-width:660px;margin:0 auto 28px}
.ns-hero-s{padding:60px 0 50px}
.ns-hero-s .ns-lead{margin-bottom:0}
.ns-crumbs{font-size:14px;color:var(--muted);margin:0 0 14px}
.ns-crumbs a{color:var(--muted);text-decoration:none}
.ns-btn{display:inline-block;background:linear-gradient(90deg,var(--blue),var(--purple));color:#fff;text-decoration:none;font-weight:700;padding:13px 24px;border-radius:12px;box-shadow:0 8px 20px rgba(37,99,235,.25);margin:4px}
.ns-btn:hover{color:#fff;filter:brightness(1.08)}
.ns-btn-ghost{background:#fff;color:var(--ink);box-shadow:none;border:1px solid var(--line)}
.ns-btn-ghost:hover{color:var(--blue)}
.ns-sec{padding-top:60px;padding-bottom:60px}
.ns-h{text-align:center;margin-bottom:34px}
.ns-empty{text-align:center;color:var(--muted)}
/* cards: vertical 9:16 crops */
.ns-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px 22px}
.ns-card-img{position:relative;display:block;aspect-ratio:9/16;border-radius:var(--r);overflow:hidden;background:linear-gradient(160deg,#dbeafe,#f3e8ff);box-shadow:0 1px 2px rgba(0,0,0,.05),0 10px 24px rgba(17,24,39,.08)}
.ns-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.ns-card:hover .ns-card-img img{transform:scale(1.05)}
.ns-card-blank{display:block;width:100%;height:100%}
.ns-card-pill{position:absolute;left:12px;top:12px;background:#fff;color:var(--c);font-size:12px;font-weight:700;padding:3px 10px;border-radius:999px}
.ns-card h3{margin:14px 0 4px;font-size:17px;line-height:1.35}
.ns-card h3 a{color:var(--ink);text-decoration:none}
.ns-card h3 a:hover{color:var(--blue)}
.ns-card-meta{font-size:13.5px;color:var(--muted);margin:0}
.ns-steps{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:64px 0}
.ns-steps ol{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.ns-steps li{background:var(--bg);border-radius:var(--r);padding:28px}
.ns-steps li span{display:inline-grid;place-items:center;width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;font-weight:800;font-size:22px;margin-bottom:14px}
.ns-steps li p{margin:0;font-size:15.5px}
.ns-feats{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px}
.ns-feats a{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px;text-decoration:none;transition:box-shadow .2s,transform .2s}
.ns-feats a:hover{box-shadow:0 12px 28px rgba(17,24,39,.08);transform:translateY(-2px)}
.ns-feats b{display:block;color:var(--c);font-size:17px;margin-bottom:6px}
.ns-feats span{color:var(--muted);font-size:15px;line-height:1.55}
/* article */
.ns-art-head{background:#fff;border-bottom:1px solid var(--line);padding:56px 0 34px}
.ns-art-head h1{font-size:clamp(30px,4vw,46px)}
.ns-art-head .ns-lead{margin:0 0 14px;max-width:none}
.ns-meta{font-size:14px;color:var(--muted);margin:0}
.ns-photo{margin:32px 0}
.ns-photo img{border-radius:var(--r);width:100%}
.ns-photo figcaption{font-size:12.5px;color:var(--muted);margin-top:6px}
.ns-photo figcaption a{color:var(--muted)}
.ns-toc{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:18px 22px;margin:0 0 30px}
.ns-toc b{color:var(--ink)}
.ns-toc ol{margin:8px 0 0;padding-left:22px}
.ns-toc a{text-decoration:none}
.ns-text{padding-bottom:20px}
.ns-text h2{margin-top:1.6em}
.ns-text h3{margin-top:1.3em}
.ns-text table{width:100%;border-collapse:separate;border-spacing:0;margin:1.5em 0;font-size:15.5px;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.ns-text th{background:#eef2ff;text-align:left;padding:10px 14px;color:var(--ink)}
.ns-text td{padding:10px 14px;border-top:1px solid var(--line);vertical-align:top}
.ns-text blockquote{margin:1.5em 0;padding:16px 20px;background:#fff;border-left:4px solid var(--purple);border-radius:0 12px 12px 0;color:var(--ink)}
.ns-text code{background:#eef2ff;padding:1px 6px;border-radius:6px;font-size:.92em}
.ns-faq,.ns-src{margin-top:40px}
.ns-faq details{background:#fff;border:1px solid var(--line);border-radius:12px;margin:10px 0;padding:14px 18px}
.ns-faq summary{cursor:pointer;font-weight:700;color:var(--ink)}
.ns-src ol{font-size:14.5px}
.ns-pager{display:flex;justify-content:center;gap:8px;margin-top:34px}
.ns-pager a,.ns-pager span{padding:6px 14px;border-radius:10px;background:#fff;border:1px solid var(--line);text-decoration:none}
.ns-pager span{background:var(--ink);color:#fff;border-color:var(--ink)}
.ns-q{width:100%;font:inherit;padding:14px 18px;border:1px solid var(--line);border-radius:12px;margin:10px 0 24px;background:#fff}
.ns-results a{display:block;padding:14px 0;border-bottom:1px solid var(--line);text-decoration:none}
.ns-results b{display:block;color:var(--ink)}
.ns-results span{color:var(--muted);font-size:14.5px}
.ns-foot{background:#fff;border-top:1px solid var(--line);padding:46px 0 26px;font-size:15px}
.ns-foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px}
.ns-foot h4{font-size:14px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.ns-foot-grid>div>a:not(.ns-brand){display:block;color:var(--text);text-decoration:none;margin:5px 0}
.ns-foot-grid>div>a:hover{color:var(--blue)}
.ns-foot p{color:var(--muted)}
.ns-legal{border-top:1px solid var(--line);margin-top:30px;padding-top:18px;font-size:13px}
@media (max-width:1000px){
 .ns-grid{grid-template-columns:repeat(3,1fr)}
 .ns-nav{gap:14px}
}
@media (max-width:820px){
 .ns-burger{display:block}
 .ns-bar{flex-wrap:wrap;height:auto;padding-top:12px;padding-bottom:12px}
 .ns-nav{display:none;width:100%;flex-direction:column;align-items:flex-start;gap:0;padding:6px 0}
 .ns-open .ns-nav{display:flex}
 .ns-nav a{padding:10px 0}
 .ns-cta{margin-top:6px}
 .ns-grid{grid-template-columns:repeat(2,1fr)}
 .ns-steps ol{grid-template-columns:1fr}
 .ns-foot-grid{grid-template-columns:1fr 1fr}
 .ns-foot-grid>div:first-child{grid-column:1/-1}
}
@media (max-width:480px){
 body.ns{font-size:16.5px}
 .ns-in{padding:0 16px}
 .ns-hero{padding:60px 0 54px}
 .ns-grid{gap:22px 14px}
 .ns-card h3{font-size:15.5px}
}