:root{--ink:#0f172a;--muted:#64748b;--line:#e2e8f0;--accent:#2563eb;--accent-ink:#1d4ed8;--cy:#22d3ee;--tint:#eef4ff;--soft:#f1f5f9;--card:#fff;--bg:#f5f7fb;--night:#0b1220;--night2:#111b33;--radius:14px;
--shadow:0 1px 2px rgba(15,23,42,.05),0 4px 14px rgba(15,23,42,.06);--shadow-hover:0 2px 4px rgba(15,23,42,.08),0 12px 30px rgba(37,99,235,.16);
--font:"Be Vietnam Pro","Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;--mono:ui-monospace,"SF Mono","Cascadia Mono",Consolas,"Liberation Mono",monospace}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.75 var(--font);font-variant-numeric:tabular-nums}
a{color:var(--accent);text-underline-offset:3px}a:hover{color:var(--accent-ink)}img{max-width:100%;height:auto}
.wrap{max-width:1140px;margin:0 auto;padding:0 18px}
header.site{position:sticky;top:0;z-index:5;background:var(--night);border-bottom:2px solid var(--accent)}
header.site .wrap{display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap;padding:10px 18px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:#fff;text-decoration:none;letter-spacing:-.01em}.brand:hover{color:#fff}
.brand img{border-radius:9px}
nav.top{display:flex;gap:2px;flex-wrap:wrap}
nav.top a{text-decoration:none;color:#cbd5e1;font-size:14px;font-weight:600;padding:7px 13px;border-radius:8px}
nav.top a:hover{background:rgba(148,163,184,.16);color:#fff}
main.wrap{padding-bottom:24px}
.crumbs{font-size:13px;color:var(--muted);margin:20px 0 0}.crumbs a{color:var(--muted);text-decoration:none}.crumbs a:hover{color:var(--accent)}
h1{font-size:36px;line-height:1.2;font-weight:800;margin:10px 0 10px;letter-spacing:-.02em}
h2{font-size:24px;line-height:1.35;font-weight:700;margin:40px 0 10px;scroll-margin-top:84px;letter-spacing:-.01em}
h3{font-size:18px;font-weight:700;margin:22px 0 6px}
.meta{color:var(--muted);font-size:14px}.meta a{color:var(--muted)}
.wf-disclosure{font-size:13px;color:var(--muted);margin:6px 0 14px}
.wf-intro{font-size:19px;line-height:1.7;color:#243044}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:44px}
.article-grid article{max-width:760px}
aside.toc{display:none}
@media(min-width:1000px){.article-grid{grid-template-columns:minmax(0,760px) 270px;justify-content:space-between}
aside.toc{display:block;position:sticky;top:84px;align-self:start;margin-top:120px;background:var(--card);border:1px solid var(--line);border-top:3px solid var(--accent);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px 18px;font-size:14px}
aside.toc ol{list-style:none;padding:0;margin:0}aside.toc li{margin:4px 0}
aside.toc a{display:block;color:var(--muted);text-decoration:none;padding:4px 8px;border-radius:6px;line-height:1.45}
aside.toc a:hover{background:var(--tint);color:var(--accent-ink)}
.toc-title{font:700 11px var(--mono);text-transform:uppercase;letter-spacing:.1em;color:var(--accent);margin:0 0 8px 8px}}
.wf-product-box{display:grid;grid-template-columns:minmax(0,1fr);gap:22px;border-radius:var(--radius);padding:20px;margin:26px 0;background:var(--card);border:1px solid var(--line);border-left:4px solid var(--accent);box-shadow:var(--shadow)}
@media(min-width:700px){.wf-product-box{grid-template-columns:280px minmax(0,1fr);align-items:center}}
.wf-figure{margin:0}.wf-figure img{display:block;width:100%;border-radius:10px;background:var(--soft)}
.wf-figure figcaption{font-size:12px;color:var(--muted);margin-top:8px}
.wf-box-name{margin:0 0 12px;font-size:18px;line-height:1.45}
.wf-keyspecs{list-style:none;padding:0;margin:0 0 14px;display:grid;grid-template-columns:repeat(auto-fit,minmax(118px,1fr));gap:10px}
.wf-keyspecs li{background:var(--night);border-radius:10px;padding:10px 12px;color:#fff}
.wf-keyspecs span{display:block;font:600 10.5px var(--mono);text-transform:uppercase;letter-spacing:.08em;color:var(--cy)}
.wf-keyspecs strong{font-size:19px;font-weight:800}
.wf-variant{background:#fff8e6;border-radius:10px;padding:10px 14px;font-size:15px}
.wf-price-note{font-size:14px;color:var(--muted)}
.wf-button{display:inline-block;background:var(--accent);color:#fff!important;padding:12px 22px;border-radius:10px;text-decoration:none;font-weight:700;box-shadow:0 6px 16px rgba(37,99,235,.28)}
.wf-button:hover{background:var(--accent-ink)}
table.wf-specs{border-collapse:separate;border-spacing:0;width:100%;font-size:15px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
table.wf-specs th,table.wf-specs td{padding:11px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
table.wf-specs tr:last-child th,table.wf-specs tr:last-child td{border-bottom:0}
table.wf-specs tr:nth-child(odd){background:#f8fafc}
table.wf-specs th{width:38%;color:var(--muted);font:600 13px var(--mono);letter-spacing:.01em}
table.wf-specs td{font-weight:600}
.wf-article h2{border-left:4px solid var(--accent);padding-left:12px}
.wf-article ul{padding-left:22px}.wf-article li{margin:5px 0}.wf-article li::marker{color:var(--accent)}
.wf-faq{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:6px 20px 12px}
.wf-faq h3{font-size:17px;margin:16px 0 4px}.wf-faq p{margin:0 0 8px;color:#243044}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(255px,1fr));gap:20px;margin:18px 0}
.card{display:flex;flex-direction:column;border-radius:var(--radius);overflow:hidden;background:var(--card);border:1px solid var(--line);text-decoration:none;color:var(--ink);box-shadow:var(--shadow);transition:box-shadow .2s,transform .2s,border-color .2s}
.card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px);border-color:var(--accent);color:var(--ink)}
.thumb{aspect-ratio:1200/630;background:var(--soft);overflow:hidden}.thumb img{display:block;width:100%;height:100%;object-fit:cover}
.card-body{padding:14px 16px 16px}.card-body h3{font-size:16px;line-height:1.45;margin:4px 0 10px}
.brand-tag{font:700 11px var(--mono);text-transform:uppercase;letter-spacing:.1em;color:var(--accent)}
ul.chips{list-style:none;padding:0;margin:0 0 8px;display:flex;flex-wrap:wrap;gap:6px}
ul.chips li{font:600 12px var(--mono);background:var(--tint);color:var(--accent-ink);border:1px solid #d6e4ff;border-radius:6px;padding:3px 9px}
.card .meta{font-size:13px;margin:0;line-height:1.55}
.pager{display:flex;gap:12px;margin:24px 0}.pager a{padding:8px 16px;border-radius:10px;background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);text-decoration:none;font-weight:600}
.tags{display:flex;flex-wrap:wrap;gap:8px}
.tags a{padding:7px 14px;border-radius:8px;background:var(--card);border:1px solid var(--line);text-decoration:none;font-size:14px;font-weight:700;color:var(--ink)}
.tags a:hover{background:var(--accent);border-color:var(--accent);color:#fff}
.hero{position:relative;margin:24px 0 8px;padding:42px 36px;border-radius:20px;color:#fff;overflow:hidden;
background:linear-gradient(rgba(34,211,238,.07) 1px,transparent 1px) 0 0/36px 36px,linear-gradient(90deg,rgba(34,211,238,.07) 1px,transparent 1px) 0 0/36px 36px,radial-gradient(120% 140% at 100% 0%,#1d4ed8 0%,#112657 45%,#0b1220 100%)}
.hero .kicker{display:inline-block;font:700 12px var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--cy);margin-bottom:10px}
.hero h1{font-size:44px;margin:0 0 10px;color:#fff}.hero p{font-size:19px;color:#cbd5e1;max-width:760px;margin:0}
.featured{display:grid;grid-template-columns:minmax(0,1fr);gap:0;border-radius:var(--radius);overflow:hidden;background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);text-decoration:none;color:var(--ink);margin:26px 0}
.featured:hover{box-shadow:var(--shadow-hover);border-color:var(--accent);color:var(--ink)}
@media(min-width:800px){.featured{grid-template-columns:1.25fr 1fr}}
.featured img{display:block;width:100%;height:auto;align-self:center;object-fit:cover}.featured{background:var(--night)}.featured .f-body{background:var(--card)}
.featured .f-body{padding:24px 26px;display:flex;flex-direction:column;justify-content:center}
.featured .f-label{font:700 12px var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--accent)}
.featured h2{margin:6px 0 10px;font-size:26px;border:0;padding:0}.featured p{color:var(--muted);margin:0 0 12px}
.section-title{display:flex;align-items:baseline;justify-content:space-between;margin:40px 0 4px}
.section-title h2{margin:0;font-size:22px;border-left:4px solid var(--accent);padding-left:12px}.section-title a{font-weight:700;text-decoration:none;font-size:14px}
footer.site{margin-top:64px;padding:36px 0 18px;color:#94a3b8;font-size:14px;background:var(--night)}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:28px}
footer.site a{display:block;color:#94a3b8;text-decoration:none;margin:6px 0}footer.site a:hover{color:var(--cy)}
.foot-brand{display:flex;align-items:center;gap:8px;font-weight:800;color:#fff;font-size:17px;margin:0 0 8px}.foot-brand img{border-radius:8px}
.foot-title{font:700 11px var(--mono);color:#fff;text-transform:uppercase;letter-spacing:.12em;margin:0 0 6px}
.foot-note{font-size:12px}.foot-copy{border-top:1px solid #1e293b;margin-top:22px;padding-top:12px;font-size:13px}
@media(max-width:800px){.foot-grid{grid-template-columns:1fr 1fr}.foot-grid>div:first-child{grid-column:1/-1}}
.brand-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:14px;margin:18px 0}
.brand-card{border-radius:var(--radius);padding:18px 20px;text-decoration:none;color:var(--ink);display:flex;justify-content:space-between;align-items:center;background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow)}
.brand-card:hover{box-shadow:var(--shadow-hover);border-color:var(--accent);color:var(--accent-ink)}.brand-card span{color:var(--muted);font:600 13px var(--mono)}
@media(max-width:600px){h1{font-size:27px}.hero{padding:28px 20px}.hero h1{font-size:30px}body{font-size:16px}.wf-intro{font-size:17px}.featured h2{font-size:21px}}