:root{--bg:#f6f8fc;--surface:#fff;--text:#132238;--muted:#5c6b7d;--brand:#1769e0;--brand2:#6f42e8;--line:#dfe6ef;--dark:#0e1830;--ok:#0b9668;--shadow:0 14px 38px rgba(21,44,84,.10);--radius:20px}
*{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:var(--bg);color:var(--text);line-height:1.65}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}.container{width:min(1140px,calc(100% - 36px));margin:auto}.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.nav-wrap{height:74px;display:flex;align-items:center;gap:28px}.logo{font-size:1.35rem;font-weight:850;letter-spacing:-.04em;color:var(--text)}.logo span{color:var(--brand)}.main-nav{margin-left:auto;display:flex;align-items:center;gap:24px}.main-nav a{color:var(--text);font-weight:650;font-size:.94rem}.menu-btn{display:none;margin-left:auto;border:0;background:transparent;font-size:1.5rem}.hero{padding:74px 0;background:radial-gradient(circle at 85% 20%,#d9e4ff 0,transparent 32%),linear-gradient(135deg,#f8fbff,#eef2ff)}.hero-grid{display:grid;grid-template-columns:1.35fr .75fr;gap:54px;align-items:center}.eyebrow{display:inline-block;font-size:.76rem;font-weight:800;letter-spacing:.12em;color:var(--brand);margin-bottom:10px}.hero h1{font-size:clamp(2.35rem,5vw,4.35rem);line-height:1.04;letter-spacing:-.055em;margin:0 0 22px;max-width:780px}.hero p{font-size:1.12rem;color:var(--muted);max-width:680px}.search-box{display:flex;background:#fff;border:1px solid var(--line);padding:8px;border-radius:16px;box-shadow:var(--shadow);max-width:650px;margin:28px 0 12px}.search-box input{flex:1;border:0;padding:12px 14px;font-size:1rem;outline:none}.search-box button,.primary,.tool-grid button{border:0;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;border-radius:11px;padding:13px 20px;font-weight:750;cursor:pointer}.disclaimer{font-size:.82rem!important}.router-card{background:var(--dark);color:#fff;padding:30px;border-radius:26px;box-shadow:0 24px 60px rgba(15,30,62,.28)}.router-card h2{margin:8px 0 16px}.router-card label,.router-card small{display:block;color:#bec9dc}.router-card select{width:100%;padding:14px;margin:8px 0 14px;border-radius:11px;border:1px solid #52617d;background:#172441;color:#fff}.full{width:100%;margin-bottom:12px}.signal{font-size:2.2rem;color:#6ea8ff}.trust-strip{background:#fff;border-block:1px solid var(--line)}.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);padding:24px 0}.trust-grid div{padding:0 22px;border-right:1px solid var(--line)}.trust-grid div:last-child{border:0}.trust-grid strong,.trust-grid span{display:block}.trust-grid span{color:var(--muted);font-size:.88rem}.section{padding:74px 0}.alt{background:#fff}.section-head{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:30px}.section-head h2{font-size:clamp(1.8rem,3vw,2.65rem);line-height:1.15;letter-spacing:-.04em;margin:0}.section-head p{max-width:480px;color:var(--muted)}.ip-grid,.article-grid,.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.ip-grid{grid-template-columns:repeat(4,1fr)}.ip-card,.article-grid article,.tool-grid article,.content-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:25px;box-shadow:0 8px 28px rgba(22,48,88,.05)}.ip-card span{font-size:.72rem;font-weight:800;color:var(--ok);text-transform:uppercase}.ip-card h3{font-size:1.4rem;margin:8px 0}.ip-card p,.article-grid p{color:var(--muted)}.brand-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}.brand-grid a{background:#f7f9fd;border:1px solid var(--line);padding:22px 14px;text-align:center;border-radius:15px;font-weight:780;color:var(--text)}.article-grid article .icon{font-size:1.7rem}.article-grid h3{margin-bottom:6px}.tools-section{background:linear-gradient(135deg,#101a31,#1b2850);color:#fff}.light p{color:#c3cee1}.tool-grid article{background:#182643;border-color:#334565;color:#fff}.tool-grid p{color:#c1cde0}.tool-grid input,.tool-grid output{width:100%;display:block;padding:12px;margin:10px 0;border-radius:10px;border:1px solid #4c6084;background:#101a31;color:#fff}.button-link{display:inline-block;background:#fff;color:#172441;padding:12px 16px;border-radius:10px;font-weight:750}.faq details{background:#fff;border:1px solid var(--line);border-radius:14px;margin:12px 0;padding:18px 20px}.faq summary{font-weight:760;cursor:pointer}.page-hero{padding:56px 0 42px;background:linear-gradient(135deg,#eef4ff,#f7f4ff);border-bottom:1px solid var(--line)}.breadcrumbs{font-size:.86rem;color:var(--muted);margin-bottom:15px}.page-hero h1{font-size:clamp(2rem,4vw,3.45rem);line-height:1.08;letter-spacing:-.05em;margin:0 0 14px}.page-hero p{max-width:760px;color:var(--muted);font-size:1.08rem}.content-wrap{display:grid;grid-template-columns:minmax(0,760px) 290px;gap:34px;align-items:start;padding:50px 0}.article-body{background:#fff;border:1px solid var(--line);border-radius:22px;padding:34px;box-shadow:var(--shadow)}.article-body h2{margin-top:34px;letter-spacing:-.025em}.article-body h3{margin-top:24px}.article-body table{width:100%;border-collapse:collapse;margin:18px 0}.article-body th,.article-body td{padding:12px;border:1px solid var(--line);text-align:left}.article-body th{background:#f4f7fb}.note{padding:16px 18px;border-left:4px solid var(--brand);background:#eef5ff;border-radius:8px;margin:18px 0}.steps{counter-reset:step;list-style:none;padding:0}.steps li{counter-increment:step;padding:0 0 20px 48px;position:relative}.steps li:before{content:counter(step);position:absolute;left:0;top:0;width:31px;height:31px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:800}.sidebar{position:sticky;top:95px}.sidebar .content-card{margin-bottom:18px}.sidebar h3{margin-top:0}.sidebar a{display:block;padding:8px 0;border-bottom:1px solid var(--line)}footer{background:#0c1428;color:#c6d0e0;padding:54px 0 18px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:50px}.footer-logo{color:#fff}.footer-grid a{display:block;color:#c6d0e0;margin:8px 0}.footer-grid h3{color:#fff}.copyright{border-top:1px solid #2b3650;margin-top:35px;padding-top:18px;font-size:.85rem}.contact-form label{display:block;font-weight:700;margin-top:13px}.contact-form input,.contact-form textarea{width:100%;padding:13px;border:1px solid var(--line);border-radius:10px;margin-top:6px}.contact-form textarea{min-height:150px}.contact-form button{margin-top:15px}.search-results{display:none;background:#fff;border:1px solid var(--line);border-radius:13px;padding:10px;max-width:650px}.search-results a{display:block;padding:9px;border-bottom:1px solid var(--line)}
@media(max-width:900px){.hero-grid,.content-wrap{grid-template-columns:1fr}.sidebar{position:static}.ip-grid{grid-template-columns:repeat(2,1fr)}.article-grid,.tool-grid{grid-template-columns:1fr 1fr}.brand-grid{grid-template-columns:repeat(3,1fr)}.main-nav{display:none;position:absolute;top:74px;left:0;right:0;background:#fff;padding:20px;flex-direction:column;align-items:flex-start;border-bottom:1px solid var(--line)}.main-nav.open{display:flex}.menu-btn{display:block}.trust-grid{grid-template-columns:repeat(2,1fr);gap:18px}.trust-grid div{border:0}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.container{width:min(100% - 24px,1140px)}.hero{padding:50px 0}.search-box{display:block}.search-box button{width:100%}.ip-grid,.article-grid,.tool-grid,.brand-grid,.trust-grid,.footer-grid{grid-template-columns:1fr}.section-head{display:block}.article-body{padding:22px}.router-card{padding:24px}}

.directory-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:24px}.directory-grid a{display:block;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:18px;color:var(--text);box-shadow:0 8px 22px rgba(21,44,84,.06)}.directory-grid a strong{display:block;margin-bottom:4px}.interactive-tool{background:#f7f9fd;border:1px solid var(--line);border-radius:18px;padding:22px;display:grid;gap:14px;margin:20px 0}.interactive-tool label{display:grid;gap:6px;font-weight:650}.interactive-tool input,.interactive-tool select{width:100%;padding:12px;border:1px solid #cfd9e7;border-radius:10px;background:white}.interactive-tool button,.secondary{width:max-content;border:0;border-radius:10px;background:var(--brand);color:#fff;padding:11px 16px;font-weight:750;cursor:pointer}.interactive-tool .secondary{background:#42526a}.interactive-tool output{white-space:pre-wrap;display:block;min-height:44px;background:white;border:1px dashed #b9c8da;border-radius:10px;padding:12px;font-family:ui-monospace,monospace}.checklist{display:grid;gap:10px;background:#f7f9fd;border:1px solid var(--line);border-radius:18px;padding:22px}.updated{margin-top:32px;padding-top:16px;border-top:1px solid var(--line);font-size:.88rem;color:var(--muted)}code{background:#eef3fa;padding:.15em .35em;border-radius:5px}@media(max-width:850px){.directory-grid{grid-template-columns:1fr 1fr}}@media(max-width:560px){.directory-grid{grid-template-columns:1fr}}

.content-figure{margin:0 0 2rem;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.content-figure img{display:block;width:100%;height:auto}
.content-figure figcaption{padding:.8rem 1rem;color:var(--muted);font-size:.9rem;border-top:1px solid var(--line)}
.article-byline{display:flex;flex-wrap:wrap;gap:.5rem 1.2rem;align-items:center;margin:0 0 1.75rem;padding:1rem 1.1rem;border:1px solid var(--line);border-radius:14px;background:#f9fbff;color:var(--muted);font-size:.9rem}
.article-byline strong{color:var(--text)}
.related-models{margin:2.2rem 0;padding:1.25rem;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}
.related-models ul{columns:2;gap:2rem}
.brand-model-directory .content-card h3{margin-top:0}
.footer-seo-links{display:flex;justify-content:center;flex-wrap:wrap;gap:1rem 1.5rem;padding:1rem;border-top:1px solid rgba(255,255,255,.12)}
.footer-seo-links a{color:inherit;font-size:.9rem}
.sitemap-list{columns:3;column-gap:2.5rem}
.sitemap-list li{break-inside:avoid;margin:.35rem 0}
.editorial-meta{padding:.8rem 1rem;margin-bottom:1rem;border-left:4px solid var(--brand);background:#eef4ff;color:var(--muted)}
.table-wrap{overflow-x:auto}
code{overflow-wrap:anywhere}
@media(max-width:800px){.related-models ul,.sitemap-list{columns:1}.article-byline{display:block}.article-byline span{display:block;margin-top:.35rem}}