:root{--bg:#f5f7fa;--surface:#fff;--ink:#1c2430;--muted:#5a6575;--line:#e2e7ee;--accent:#1f5fa8;--accent-ink:#174a85;--accent-soft:#e8f0fb;--ball:#f08a24;--radius:12px;--shadow:0 1px 2px rgba(20,30,50,.06),0 4px 14px rgba(20,30,50,.06);--font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--serif:Georgia,"Iowan Old Style","Times New Roman",serif}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:16px}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.65 var(--font)}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-underline-offset:2px}
a:hover{color:var(--accent-ink)}
.wrap{max-width:1160px;margin:0 auto;padding:0 16px}
.narrow{max-width:800px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:0;background:#fff;padding:8px 12px;z-index:100}
.skip:focus{left:8px}
/* header (not sticky) */
.site-header{background:var(--surface);border-bottom:1px solid var(--line)}
.hdr{display:flex;align-items:center;gap:20px;min-height:66px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;font-size:1.12rem;letter-spacing:-.01em;white-space:nowrap}
.logo em{font-style:normal;color:var(--accent)}
.logo-mark{width:36px;height:36px;flex:none}
.main-nav{margin-left:auto}
.main-nav ul,.mobile-nav ul{list-style:none;margin:0;padding:0;display:flex;gap:4px}
.main-nav a{display:block;padding:8px 12px;border-radius:8px;text-decoration:none;color:var(--ink);font-weight:600;font-size:.96rem}
.main-nav a:hover{background:var(--accent-soft);color:var(--accent-ink)}
.hdr-actions{display:flex;align-items:center;gap:8px}
.search-btn{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);background:var(--bg);color:var(--ink);border-radius:999px;padding:8px 14px;font:600 .92rem var(--font);cursor:pointer}
.search-btn:hover{border-color:var(--accent);color:var(--accent)}
.search-btn.light{margin-top:12px}
.menu-btn{display:none;width:42px;height:42px;border:1px solid var(--line);background:var(--surface);border-radius:10px;cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:4px}
.menu-btn span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px}
.mobile-nav{border-top:1px solid var(--line);padding:8px 16px 14px}
.mobile-nav ul{flex-direction:column}
.mobile-nav a{display:block;padding:10px 4px;text-decoration:none;color:var(--ink);font-weight:600;border-bottom:1px solid var(--line)}
@media (max-width:820px){.main-nav{display:none}.menu-btn{display:flex}.hdr-actions{margin-left:auto}.search-btn span{display:none}.search-btn{padding:9px}.search-btn.light span{display:inline}.search-btn.light{padding:8px 14px}}
@media (min-width:821px){.mobile-nav{display:none!important}}
/* search modal */
.search-modal{position:fixed;inset:0;background:rgba(15,23,35,.45);z-index:50;display:flex;align-items:flex-start;justify-content:center;padding:8vh 16px 16px}
.search-modal[hidden]{display:none}
.search-box{background:var(--surface);width:100%;max-width:640px;border-radius:14px;box-shadow:0 20px 60px rgba(0,0,0,.25);overflow:hidden}
.search-top{display:flex;align-items:center;gap:10px;padding:12px 14px;border-bottom:1px solid var(--line);color:var(--muted)}
.search-top input{flex:1;min-width:0;font:400 1.08rem/1.3 var(--font);padding:.7rem .8rem;border:1px solid var(--line);border-radius:10px;color:var(--ink);background:#fff}
.search-top input:focus{outline:2px solid var(--accent);outline-offset:0;border-color:var(--accent)}
.search-top input::-webkit-search-cancel-button{-webkit-appearance:none;display:none}
.search-status{margin:0;padding:.6rem 1rem;font-size:.92rem;color:var(--muted)}
.search-open,.search-open body{overflow:hidden}
.search-close{border:0;background:var(--bg);border-radius:8px;width:34px;height:34px;font-size:1.4rem;cursor:pointer;color:var(--muted)}
.search-results{list-style:none;margin:0;padding:0 .5rem .6rem;max-height:60vh;overflow:auto}
.search-results a{display:flex;justify-content:space-between;align-items:baseline;gap:1rem;padding:.6rem .6rem;border-radius:10px;text-decoration:none;color:var(--ink)}
.search-results a:hover,.search-results a:focus{background:var(--accent-soft);outline:0}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--accent);color:#fff;border:1px solid var(--accent);padding:11px 20px;border-radius:10px;font:700 .98rem var(--font);text-decoration:none;cursor:pointer;min-height:44px}
.btn:hover{background:var(--accent-ink);color:#fff}
.btn.ghost{background:var(--surface);color:var(--accent);border-color:#c9d6ea}
.btn.ghost:hover{background:var(--accent-soft)}
.btn.sm{padding:6px 12px;font-size:.85rem;min-height:36px;white-space:nowrap}
/* home */
.home-hero{background:linear-gradient(180deg,#fff 0%,var(--bg) 100%);border-bottom:1px solid var(--line)}
.hh{display:grid;grid-template-columns:1.1fr 1fr;gap:40px;align-items:center;padding-top:44px;padding-bottom:44px}
.hh h1{font-size:clamp(2rem,4vw,2.9rem);line-height:1.15;margin:.2em 0 .35em;letter-spacing:-.02em}
.hh img{border-radius:16px;box-shadow:var(--shadow);aspect-ratio:1200/630;object-fit:cover}
.hh-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.kicker{font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;font-weight:800;color:var(--accent)}
.lede{font-size:1.12rem;color:var(--muted);margin:0}
@media (max-width:820px){.hh{grid-template-columns:1fr;gap:24px;padding-top:28px}}
.home-sec{margin:44px auto}
.sec-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap}
.sec-head h2{margin:0 0 16px;font-size:1.55rem}
.sec-head a{font-weight:700;text-decoration:none}
/* cards */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px;margin-bottom:12px}
.card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;text-decoration:none;color:var(--ink);box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s}
.card:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(20,30,50,.12);color:var(--ink)}
.card img{aspect-ratio:16/9;object-fit:cover;width:100%}
.card-body{padding:14px 16px 18px;display:flex;flex-direction:column;gap:6px}
.card-title{font-weight:800;font-size:1.06rem;line-height:1.3}
.card-text{font-size:.92rem;color:var(--muted);line-height:1.5}
/* hubs */
.hub-hero{background:var(--surface);border-bottom:1px solid var(--line);padding:26px 0 30px}
.hub-hero h1{font-size:clamp(1.8rem,3.4vw,2.5rem);margin:.2em 0 .3em;letter-spacing:-.02em}
.hub-list h2{font-size:1.4rem;margin:36px 0 16px}
.hub-intro{margin:40px auto 56px}
/* article */
.article{padding-bottom:20px}
.article h1{text-align:center;font-size:clamp(1.85rem,3.6vw,2.6rem);line-height:1.2;letter-spacing:-.02em;margin:.4em 0 .3em}
.byline{text-align:center;color:var(--muted);font-size:.9rem;margin:0 0 18px}
.byline a{color:inherit}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;padding:0;margin:18px 0 0;font-size:.85rem;color:var(--muted)}
.crumbs li+li::before{content:"›";margin-right:6px;color:#9aa5b4}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--accent)}
.hero{margin:0 auto 8px}
.hero img{border-radius:14px;width:100%;aspect-ratio:1200/630;object-fit:cover;box-shadow:var(--shadow)}
.offer{text-align:center;background:var(--accent-soft);border:1px solid #cddcf2;border-radius:var(--radius);padding:18px 16px 20px;margin:12px 0 24px}
.offer p{margin:0 0 12px;font-weight:600}
.offer h2{margin:0 0 14px!important;font-size:1.35rem}
.prose{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:8px 32px 28px;margin-top:20px;box-shadow:var(--shadow)}
.prose.static,.prose.hub-intro,.home-sec.prose{padding-top:16px}
@media (max-width:640px){.prose{padding:4px 16px 20px;border-radius:12px}}
.prose h2{font-size:1.6rem;line-height:1.25;margin:1.7em 0 .5em;letter-spacing:-.01em}
.prose h3{font-size:1.25rem;line-height:1.3;margin:1.5em 0 .4em}
.prose h4{font-size:1.05rem;margin:1.2em 0 .3em}
.prose p,.prose ul,.prose ol{margin:0 0 1em}
.prose li{margin:.25em 0}
.toc{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:12px 18px;margin:18px 0 8px}
.toc summary{font-weight:800;cursor:pointer}
.toc ol{margin:10px 0 4px;padding-left:22px;columns:2;column-gap:28px;font-size:.94rem}
@media (max-width:640px){.toc ol{columns:1}}
.table-wrap{overflow-x:auto;margin:1.2em 0;border:1px solid var(--line);border-radius:10px}
.table-wrap table{border-collapse:collapse;width:100%;font-size:.94rem;min-width:520px}
.table-wrap.compare table{min-width:640px}
.table-wrap table.spec{min-width:0}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
thead th{background:#eef3fa;color:var(--accent-ink);font-weight:800;font-size:.86rem;text-transform:none}
tbody tr:nth-child(even){background:#fafbfd}
tbody tr:last-child td,tbody tr:last-child th{border-bottom:0}
.callout{background:var(--accent-soft);border-left:4px solid var(--accent);border-radius:8px;padding:14px 16px;margin:1.2em 0}
.callout.tip{background:#eef8f1;border-color:#2e9d5b}
.callout.warn{background:#fff6ea;border-color:var(--ball)}
.callout.fact{background:#f4f1fb;border-color:#6b4fbb}
.callout p:last-child{margin-bottom:0}
.keyfacts{border:1px solid var(--line);border-radius:var(--radius);padding:6px 18px 10px;margin:1.3em 0;background:linear-gradient(180deg,#f9fbfe,#fff)}
.keyfacts h3{margin:.6em 0 .3em!important;font-size:1.08rem}
.keyfacts ul{padding-left:20px}
.proscons{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:1em 0}
.proscons>div{border:1px solid var(--line);border-radius:10px;padding:4px 14px 6px}
.proscons>div:first-child{border-top:3px solid #2e9d5b}
.proscons>div:last-child{border-top:3px solid #d34a4a}
.proscons h4{margin:.6em 0 .2em}
.proscons ul{padding-left:18px;margin-bottom:.4em;font-size:.94rem}
@media (max-width:560px){.proscons{grid-template-columns:1fr}}
.steps{counter-reset:s;list-style:none;padding-left:0}
.steps li{counter-increment:s;position:relative;padding-left:44px;margin:.8em 0}
.steps li::before{content:counter(s);position:absolute;left:0;top:0;width:30px;height:30px;border-radius:50%;background:var(--accent);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:.9rem}
.barchart{border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;margin:1.3em 0}
.barchart figcaption{font-weight:800;margin-bottom:10px;font-size:.95rem}
.bar{display:grid;grid-template-columns:120px 1fr;align-items:center;gap:10px;margin:8px 0;font-size:.92rem}
.bar b{display:block;background:linear-gradient(90deg,var(--accent),#4f8ad1);color:#fff;border-radius:6px;padding:3px 8px;width:calc(var(--v)*1%);min-width:2.6em;font-size:.82rem;text-align:right}
.diagram{margin:1.4em 0;border:1px solid var(--line);border-radius:var(--radius);padding:14px;background:#fbfcfe}
.diagram svg{width:100%;height:auto;display:block;font-family:var(--font)}
.diagram svg+svg{margin-top:10px}
.diagram figcaption{font-size:.85rem;color:var(--muted);text-align:center;margin-top:8px}
/* products */
.badge{display:inline-block;background:var(--accent-soft);color:var(--accent-ink);font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.05em;padding:3px 9px;border-radius:999px}
.toplist{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:1.4em 0}
.top-card{position:relative;border:1px solid var(--line);border-radius:var(--radius);padding:18px 14px 16px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:6px;background:#fff}
.top-card:first-child{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-soft)}
.top-rank{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--accent);color:#fff;font-weight:800;border-radius:999px;padding:1px 12px;font-size:.85rem}
.top-name{font-weight:800;margin:4px 0 0!important;line-height:1.3}
.top-best{font-size:.88rem;color:var(--muted);margin:0 0 8px!important;flex:1}
@media (max-width:720px){.toplist{grid-template-columns:1fr;gap:20px}}
.pbox{border:1px solid var(--line);border-radius:14px;padding:16px 18px 18px;margin:1.2em 0 1.6em;background:linear-gradient(180deg,#fbfcfe,#fff)}
.pbox-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.pbox-name{font-weight:800;font-size:1.15rem;margin:0!important}
.pbox-best{margin:.6em 0 .4em!important}
.pbox .table-wrap{margin:.8em 0}
.pbox-cta{margin-top:10px}
.pbox-cta .btn{width:100%;max-width:320px}
/* faq & sources */
.faqs{margin:1em 0}
.faq{border:1px solid var(--line);border-radius:10px;margin:10px 0;background:#fff}
.faq summary{cursor:pointer;font-weight:700;padding:13px 16px;list-style-position:outside}
.faq p{margin:0;padding:0 16px 14px;color:#2c3644}
.sources{margin-top:28px;font-size:.9rem;color:var(--muted)}
.sources summary{cursor:pointer;font-weight:700}
.sources ul{padding-left:20px;margin-top:8px}
.related{margin:40px 0 50px}
.related h2{font-size:1.5rem}
/* footer */
.site-footer{background:#fff;border-top:1px solid var(--line);margin-top:30px;font-size:.93rem}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr .8fr;gap:28px;padding-top:36px;padding-bottom:22px}
.fgrid ul{list-style:none;padding:0;margin:0}
.fgrid li{margin:6px 0}
.fgrid a{color:var(--ink);text-decoration:none}
.fgrid a:hover{color:var(--accent)}
.fh{font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:6px 0 10px}
.fabout{color:var(--muted);margin:10px 0 0}
.fbottom{border-top:1px solid var(--line);padding-top:16px;padding-bottom:26px;color:var(--muted);font-size:.84rem}
.fbottom p{margin:0 0 6px}
@media (max-width:820px){.fgrid{grid-template-columns:1fr 1fr}.fgrid>div:first-child{grid-column:1/-1}}
@media (max-width:460px){.fgrid{grid-template-columns:1fr}}
@media (max-width:640px){body{font-size:16.5px}.prose h2{font-size:1.4rem}}

.search-results strong{font-weight:600}
.search-results span{font-size:.82rem;color:var(--muted);white-space:nowrap}
@media (max-width:520px){.search-modal{padding:12px}.search-results span{display:none}}