:root{
  --bg:#070b14;--panel:#0e1526;--panel2:#111b31;--text:#eef4ff;--muted:#aeb9cc;
  --line:#24314d;--accent:#ff4d2e;--accent2:#ff9b26;--cyan:#49d6ff;--violet:#7d6cff;
  --max:1160px;--radius:20px;--shadow:0 18px 50px rgba(0,0,0,.28)
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:
radial-gradient(circle at 85% 0%,rgba(73,214,255,.10),transparent 28%),
radial-gradient(circle at 15% 0%,rgba(255,77,46,.10),transparent 30%),var(--bg);color:var(--text);line-height:1.68}
a{color:#9be7ff;text-decoration-thickness:1px;text-underline-offset:3px}
img{max-width:100%;display:block}
.container{width:min(var(--max),calc(100% - 36px));margin:auto}
.site-header{position:sticky;top:0;z-index:40;background:rgba(7,11,20,.9);backdrop-filter:blur(14px);border-bottom:1px solid rgba(255,255,255,.08)}
.nav{height:70px;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:white;font-weight:800;letter-spacing:.2px}
.brand-mark{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--accent),var(--accent2));box-shadow:0 0 0 5px rgba(255,100,40,.08)}
.navlinks{display:flex;gap:18px;margin-left:auto;align-items:center}
.navlinks a{color:#dce6f5;text-decoration:none;font-size:.95rem}
.navlinks a:hover{color:#fff}
.menu-btn{display:none;margin-left:auto;border:1px solid var(--line);background:var(--panel);color:white;border-radius:10px;padding:9px 12px}
.hero{padding:70px 0 46px}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:48px;align-items:center}
.eyebrow{font-size:.8rem;text-transform:uppercase;letter-spacing:.16em;color:var(--cyan);font-weight:800}
h1,h2,h3{line-height:1.15;letter-spacing:-.02em}
h1{font-size:clamp(2.55rem,6vw,5.2rem);margin:.3rem 0 1rem}
h2{font-size:clamp(1.75rem,3.4vw,2.7rem);margin:2.2rem 0 .8rem}
h3{font-size:1.28rem;margin:1.65rem 0 .45rem}
.lede{font-size:1.18rem;color:#c6d3e7;max-width:740px}
.hero-card,.product-card,.panel,.article-card,.toc,.callout,.calc-card{background:linear-gradient(180deg,rgba(17,27,49,.98),rgba(11,18,32,.98));border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.hero-card{overflow:hidden;padding:14px}
.hero-card img{border-radius:14px;width:100%;aspect-ratio:665/429;object-fit:cover}
.badges{display:flex;flex-wrap:wrap;gap:9px;margin:20px 0}
.badge{border:1px solid #31415f;background:#0c1426;color:#cbd7ea;border-radius:999px;padding:6px 10px;font-size:.82rem}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin:24px 0}
.cta{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:13px;padding:13px 18px;font-weight:800;text-decoration:none;color:white;background:linear-gradient(135deg,var(--accent),var(--accent2));box-shadow:0 10px 24px rgba(255,100,40,.2);cursor:pointer}
.cta:hover{filter:brightness(1.08);transform:translateY(-1px)}
.cta.secondary{background:#16223a;border:1px solid #31415f;box-shadow:none}
.disclosure{font-size:.87rem;color:#9eabc0;background:#0a1120;border-left:3px solid var(--accent);padding:10px 12px;border-radius:8px;margin:16px 0}
.section{padding:38px 0}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.article-card{padding:22px;text-decoration:none;color:inherit}
.article-card:hover{border-color:#485f88;transform:translateY(-2px)}
.article-card p{color:var(--muted);margin-bottom:0}
.kicker{font-size:.78rem;text-transform:uppercase;letter-spacing:.12em;color:#ffad66;font-weight:800}
.article-wrap{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:38px;align-items:start;padding:46px 0 70px}
.article{min-width:0}
.article h1{font-size:clamp(2.4rem,5vw,4.4rem)}
.article p,.article li{font-size:1.05rem;color:#d5deeb}
.article strong{color:white}
.article ul,.article ol{padding-left:1.3rem}
.article table{width:100%;border-collapse:collapse;margin:18px 0 26px;background:#0c1424;border:1px solid var(--line)}
.article th,.article td{padding:12px;border:1px solid var(--line);text-align:left;vertical-align:top}
.article th{background:#121e34;color:white}
.article td{color:#cfdae9}
.breadcrumbs{font-size:.88rem;color:#8fa0b7;margin-bottom:14px}
.breadcrumbs a{color:#a7bad3}
.meta{color:#8fa0b7;font-size:.9rem;margin:10px 0 16px}
.toc{padding:18px;margin:24px 0}
.toc strong{display:block;margin-bottom:8px}
.toc a{display:block;margin:4px 0;color:#c9d8ec}
.callout{padding:18px 20px;border-left:4px solid var(--cyan);margin:26px 0}
.callout.warning{border-left-color:var(--accent2)}
.product-card{position:sticky;top:92px;padding:14px}
.product-card img{border-radius:13px;margin-bottom:14px}
.product-card h3{margin:.2rem 0 .4rem}
.product-card p{color:#b8c5d8;font-size:.92rem}
.product-card .cta{width:100%;margin-top:8px}
.small{font-size:.84rem;color:#8fa0b7}
.related{border-top:1px solid var(--line);margin-top:36px;padding-top:22px}
.related a{display:block;margin:7px 0}
.faq{border-top:1px solid var(--line);padding:15px 0}
.faq h3{margin:.2rem 0 .45rem}
.footer{border-top:1px solid var(--line);padding:38px 0 55px;background:#050912}
.footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:26px}
.footer a{display:block;margin:7px 0;color:#b8c6d9}
.footer p{color:#8998ae}
.footer .external{display:inline-flex;color:white;margin-top:10px}
.notice{padding:12px 0;background:#0e1628;border-bottom:1px solid #23314d;color:#b7c6d8;text-align:center;font-size:.88rem}
.popup-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.72);display:none;align-items:center;justify-content:center;padding:18px;z-index:100}
.popup-backdrop.open{display:flex}
.popup{width:min(760px,100%);background:#0b1323;border:1px solid #2d3f61;border-radius:22px;box-shadow:0 28px 80px rgba(0,0,0,.55);overflow:hidden;position:relative;display:grid;grid-template-columns:.95fr 1.05fr}
.popup img{width:100%;height:100%;object-fit:cover}
.popup-copy{padding:28px}
.popup-copy h2{margin:.2rem 0 .7rem;font-size:2rem}
.popup-copy p{color:#b8c5d8}
.popup-close{position:absolute;right:10px;top:10px;width:36px;height:36px;border-radius:50%;border:1px solid #41526f;background:#0d172a;color:white;font-size:1.2rem;cursor:pointer}
.calc-card{padding:24px;margin:26px 0}
.field{display:grid;gap:7px;margin-bottom:14px}
.field label{font-weight:700}
.field input{width:100%;background:#070d19;border:1px solid #31415f;border-radius:11px;color:white;padding:12px;font-size:1rem}
.result{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:16px}
.result div{background:#09111f;border:1px solid var(--line);padding:14px;border-radius:12px}
.result b{display:block;font-size:1.25rem}
@media(max-width:900px){
 .hero-grid,.article-wrap,.footer-grid,.popup{grid-template-columns:1fr}
 .article-wrap{gap:24px}.product-card{position:relative;top:auto}
 .grid3{grid-template-columns:1fr 1fr}
 .popup img{max-height:280px}
}
@media(max-width:680px){
 .navlinks{display:none;position:absolute;left:18px;right:18px;top:62px;padding:16px;background:#0b1323;border:1px solid var(--line);border-radius:14px;flex-direction:column;align-items:flex-start}
 .navlinks.open{display:flex}.menu-btn{display:block}
 .hero{padding-top:44px}.grid3,.grid2,.result{grid-template-columns:1fr}
 h1{font-size:2.55rem}.article h1{font-size:2.45rem}
 .container{width:min(var(--max),calc(100% - 26px))}
}