:root{--ink:#17212b;--muted:#667281;--paper:#fff;--bg:#f4f6f8;--nav:#111b2a;--accent:#ff9900;--line:#e1e6eb;--soft:#fff7e7}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.68 system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}
a{color:inherit}.wrap{width:min(1160px,92%);margin:auto}
.site-header{background:var(--nav);color:white;position:sticky;top:0;z-index:20;box-shadow:0 2px 10px #0002}.nav{height:68px;display:flex;align-items:center;justify-content:space-between}.brand{font-size:22px;font-weight:900;text-decoration:none}.brand span{color:var(--accent)}.nav-links a{color:#d7dee7;text-decoration:none;margin-left:18px}
.hero{background:linear-gradient(135deg,#111b2a,#28405f);color:white;padding:68px 0 54px}.hero h1{font-size:clamp(38px,6vw,68px);line-height:1.02;max-width:900px;margin:8px 0 18px}.hero p{font-size:19px;color:#d8e2ed;max-width:800px}.eyebrow{font-size:13px;letter-spacing:.1em;text-transform:uppercase;font-weight:800;color:#95a7bc}
.notice{margin:26px 0;background:var(--soft);border:1px solid #f0d29a;border-radius:14px;padding:14px 17px}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin:28px 0 60px}.card{background:white;border:1px solid var(--line);border-radius:18px;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 6px 20px #1a25360a}.card-img{background:white;height:220px;display:grid;place-items:center;padding:18px;border-bottom:1px solid var(--line)}.card-img img{width:100%;height:100%;object-fit:contain}.card-body{padding:18px;display:flex;flex-direction:column;height:100%}.card h2{font-size:18px;line-height:1.3;margin:7px 0}.meta{font-size:12px;font-weight:800;text-transform:uppercase;color:#6a7480;letter-spacing:.06em}.card p{font-size:14px;color:var(--muted)}.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:auto}.btn{display:inline-block;text-decoration:none;font-weight:800;border-radius:11px;padding:10px 14px;background:var(--nav);color:white}.btn.amazon{background:var(--accent);color:#171717}
.breadcrumb{padding:24px 0 0;font-size:14px;color:var(--muted)}.breadcrumb a{text-decoration:none}.product-hero{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;padding:34px 0 44px}.product-photo{background:white;border:1px solid var(--line);border-radius:24px;min-height:470px;padding:32px;display:grid;place-items:center}.product-photo img{width:100%;height:100%;max-height:420px;object-fit:contain}.product-info h1{font-size:clamp(36px,5vw,57px);line-height:1.06;margin:8px 0 15px}.lead{font-size:20px;color:var(--muted)}.asin{display:inline-block;background:#edf2f7;border-radius:999px;padding:7px 11px;font-size:13px;font-weight:800}.feature-list{padding-left:21px}.feature-list li{margin:8px 0}.cta{display:inline-block;background:var(--accent);color:#151515;text-decoration:none;font-size:18px;font-weight:900;padding:14px 20px;border-radius:12px;margin-top:10px}.fine{font-size:13px;color:var(--muted)}
.article-layout{display:grid;grid-template-columns:minmax(0,760px) 280px;gap:34px;align-items:start}.article{background:white;border:1px solid var(--line);border-radius:20px;padding:clamp(24px,4vw,44px);margin-bottom:50px}.content-section{border-bottom:1px solid var(--line);padding:3px 0 25px;margin-bottom:25px}.content-section:last-child{border-bottom:0}.content-section h2{font-size:28px;line-height:1.2;margin:0 0 14px}.content-section p{color:#354252}.faq details{border:1px solid var(--line);border-radius:12px;padding:13px 15px;margin:10px 0}.faq summary{font-weight:800;cursor:pointer}.sidebar{position:sticky;top:90px}.sidebox{background:white;border:1px solid var(--line);border-radius:17px;padding:18px;margin-bottom:15px}.sidebox h3{margin-top:0}.sidebox a{display:block;text-decoration:none;padding:6px 0;font-weight:700}
.related{padding-bottom:55px}.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.related-card{background:white;border:1px solid var(--line);border-radius:14px;padding:14px;text-decoration:none;font-weight:800;display:flex;gap:10px;align-items:center}.related-card img{width:64px;height:64px;object-fit:contain}
footer{background:#111923;color:#c7d0da;padding:38px 0;margin-top:30px}.foot{display:flex;gap:25px;justify-content:space-between;flex-wrap:wrap}.foot small{max-width:720px}
@media(max-width:950px){.grid{grid-template-columns:repeat(2,1fr)}.product-hero,.article-layout{grid-template-columns:1fr}.sidebar{position:static;display:none}.product-photo{min-height:340px}.related-grid{grid-template-columns:1fr}}
@media(max-width:560px){.grid{grid-template-columns:1fr}.nav-links{display:none}.hero{padding-top:48px}.product-photo{min-height:280px}.article{padding:22px}.product-hero{gap:24px}}