:root{--ink:#1c2430;--muted:#5a6573;--line:#e2e6ec;--bg:#ffffff;--soft:#f4f6f9;--soft2:#eef2f7;--accent:#1f5bd8;--accent-d:#1748ad;--accent-soft:#e8effc;--good:#16794a;--bad:#b3261e;--radius:12px;--frame:1140px;--read:780px;--hh:64px}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--hh) + 16px)}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;font-size:17px;line-height:1.7;color:var(--ink);background:var(--bg);overflow-x:hidden}
img,svg{max-width:100%}
a{color:var(--accent)}
a:hover{color:var(--accent-d)}
:focus-visible{outline:3px solid #f2a900;outline-offset:2px}
.skip{position:absolute;left:-999px;top:0;background:#fff;padding:8px 12px;z-index:200}
.skip:focus{left:8px}
/* header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);backdrop-filter:saturate(1.2) blur(6px)}
.hdr{max-width:var(--frame);margin:0 auto;padding:0 16px;height:var(--hh);display:flex;align-items:center;gap:12px}
.brand{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--ink);font-weight:700;font-size:16px;line-height:1.2;min-width:0;flex:1 1 auto}
.brand svg{flex:0 0 32px;width:32px;height:32px}
.brand-text{white-space:nowrap}
.nav{display:flex;gap:4px;align-items:center}
.nav a{text-decoration:none;color:var(--ink);font-size:15px;font-weight:600;padding:8px 10px;border-radius:8px;white-space:nowrap}
.nav a:hover,.nav a[aria-current="page"]{background:var(--soft2);color:var(--accent-d)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;text-decoration:none;font-weight:700;border-radius:10px;padding:12px 20px;font-size:16px;line-height:1.2;white-space:nowrap;border:0;cursor:pointer}
.btn-cta{background:var(--accent);color:#fff!important;box-shadow:0 2px 0 var(--accent-d)}
.btn-cta:hover{background:var(--accent-d)}
.btn-ghost{background:#fff;color:var(--ink)!important;border:1px solid var(--line)}
.hdr .btn-cta{flex:0 0 auto;padding:10px 16px;font-size:15px}
.menu-btn{display:none;flex:0 0 44px;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:10px;align-items:center;justify-content:center;cursor:pointer;color:var(--ink);padding:0}
.menu-btn svg{width:22px;height:22px}
.menu-btn .i-close{display:none}
.menu-btn[aria-expanded="true"] .i-open{display:none}
.menu-btn[aria-expanded="true"] .i-close{display:block}
@media (max-width:960px){
 .menu-btn{display:inline-flex}
 .nav{display:none;position:absolute;left:0;right:0;top:var(--hh);background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:8px 16px 16px;box-shadow:0 10px 24px rgba(20,30,50,.08)}
 .nav.open{display:flex}
 .nav a{padding:12px 10px;font-size:16px}
}
@media (max-width:520px){
 .hdr{padding:0 12px;gap:8px}
 .brand{font-size:14px;gap:6px;line-height:1.1}
 .brand svg{width:26px;height:26px;flex-basis:26px}
 .brand-text{white-space:normal;min-width:0}
 .hdr .btn-cta{padding:10px 13px;font-size:15px}
}
@media (max-width:400px){.hdr{gap:6px;padding:0 10px}.hdr .btn-cta{padding:9px 10px;font-size:14px}.menu-btn{flex-basis:40px;width:40px;height:40px}}
@media (max-width:340px){.hdr{gap:4px;padding:0 6px}.brand{gap:4px;letter-spacing:-.01em}.brand svg{width:20px;height:20px;flex-basis:20px}.hdr .btn-cta{padding:8px 6px;font-size:13px}.menu-btn{flex-basis:36px;width:36px;height:36px}}
/* layout */
main{display:block}
.wrap{max-width:var(--frame);margin:0 auto;padding:0 20px}
.read{max-width:var(--read);margin:0 auto}
.crumbs{font-size:14px;color:var(--muted);padding:14px 0 0}
.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.crumbs li+li::before{content:"›";margin-right:6px;color:#9aa4b1}
.crumbs a{color:var(--muted)}
.hero{text-align:center;padding:26px 0 18px}
.hero h1{font-size:clamp(28px,4.2vw,42px);line-height:1.18;margin:0 auto 14px;max-width:880px;letter-spacing:-.01em}
.hero .lead{font-size:19px;color:var(--muted);max-width:720px;margin:0 auto 16px}
.hero .offer-line{font-weight:600;margin:4px 0 12px}
.hero-band{background:linear-gradient(180deg,var(--soft) 0%,#fff 100%);border-bottom:1px solid var(--line)}
article h2{font-size:clamp(23px,2.8vw,29px);line-height:1.25;margin:44px 0 12px;letter-spacing:-.005em}
article h3{font-size:21px;line-height:1.3;margin:28px 0 8px}
article h4{font-size:18px;margin:22px 0 6px}
article p{margin:0 0 16px}
article ul,article ol{padding-left:24px;margin:0 0 18px}
article li{margin:0 0 6px}
.toc{background:var(--soft);border:1px solid var(--line);border-radius:var(--radius);padding:16px 20px;margin:22px 0}
.toc strong{display:block;margin-bottom:6px}
.toc ol{margin:0;padding-left:20px;columns:2;column-gap:28px;font-size:15.5px}
@media (max-width:640px){.toc ol{columns:1}}
.verdict{border:2px solid var(--accent);background:var(--accent-soft);border-radius:var(--radius);padding:18px 20px;margin:24px 0}
.verdict .vlabel{display:inline-block;font-size:13px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--accent-d);margin-bottom:4px}
.verdict p:last-child{margin-bottom:0}
.callout{border-left:4px solid var(--accent);background:var(--soft);padding:14px 18px;border-radius:0 10px 10px 0;margin:20px 0}
.callout.warn{border-color:#d08a00;background:#fff8e8}
.callout p:last-child{margin:0}
.table-wrap{overflow-x:auto;margin:20px 0 24px;border:1px solid var(--line);border-radius:var(--radius);-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;width:100%;font-size:15.5px;min-width:520px}
caption{caption-side:top;text-align:left;font-weight:700;padding:12px 14px;background:var(--soft);border-bottom:1px solid var(--line)}
th,td{padding:10px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
thead th{background:#f8fafc;font-size:14.5px}
tbody tr:last-child td,tbody tr:last-child th{border-bottom:0}
tbody th{font-weight:700}
.proscons{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:22px 0}
@media (max-width:700px){.proscons{grid-template-columns:1fr}}
.proscons>div{border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;background:#fff}
.proscons h3,.proscons h4{margin:0 0 8px;font-size:18px}
.proscons .pros{border-top:4px solid var(--good)}
.proscons .cons{border-top:4px solid var(--bad)}
.proscons ul{margin:0;padding-left:20px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin:20px 0}
.card{border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;background:#fff}
.card h3,.card h4{margin:0 0 6px;font-size:18px}
.card p{margin:0;font-size:15.5px}
.card .tag{display:inline-block;font-size:12.5px;font-weight:700;background:var(--soft2);color:var(--accent-d);border-radius:999px;padding:2px 10px;margin-bottom:8px}
ol.steps{list-style:none;padding:0;counter-reset:s;margin:20px 0}
ol.steps>li{counter-increment:s;position:relative;padding:14px 16px 14px 62px;border:1px solid var(--line);border-radius:var(--radius);margin-bottom:10px;background:#fff}
ol.steps>li::before{content:counter(s);position:absolute;left:16px;top:14px;width:32px;height:32px;border-radius:50%;background:var(--accent);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:15px}
ol.steps>li strong:first-child{display:block}
.figure{border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;margin:22px 0;background:#fff}
.figure figcaption{font-weight:700;margin-bottom:10px}
.bar{display:grid;grid-template-columns:120px 1fr 92px;gap:10px;align-items:center;font-size:15px;margin:8px 0}
.bar .track{background:var(--soft2);border-radius:6px;height:18px;overflow:hidden}
.bar .fill{background:var(--accent);height:100%;border-radius:6px}
.bar .val{text-align:right;font-weight:700}
@media (max-width:520px){.bar{grid-template-columns:82px 1fr 74px;font-size:14px}}
.figure .note{font-size:14px;color:var(--muted);margin:10px 0 0}
.flow{display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:center;margin:18px 0}
.flow span{background:var(--soft2);border:1px solid var(--line);border-radius:10px;padding:8px 12px;font-weight:600;font-size:15px}
.flow i{font-style:normal;color:var(--accent);font-weight:800}
.cta-panel{background:linear-gradient(135deg,#f1f5fd,#fff);border:1px solid #cfdcf5;border-radius:16px;padding:22px;margin:28px 0;text-align:center}
.cta-panel p{margin:0 0 14px;font-weight:600}
.cta-panel h2{margin:0 0 10px}
.end-cta{margin:44px 0 10px}
.faq details{border:1px solid var(--line);border-radius:10px;margin:0 0 10px;background:#fff}
.faq summary{cursor:pointer;font-weight:700;padding:14px 16px;list-style:none;position:relative;padding-right:44px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:16px;top:10px;font-size:22px;color:var(--accent)}
.faq details[open] summary::after{content:"−"}
.faq .ans{padding:0 16px 12px}
.related{background:var(--soft);border-radius:var(--radius);padding:18px 20px;margin:36px 0 10px}
.related h2{margin-top:0;font-size:22px}
.related ul{list-style:none;padding:0;margin:0}
.related li{padding:8px 0;border-top:1px solid var(--line)}
.related li:first-child{border-top:0}
.related a{font-weight:700}
.related span{display:block;font-size:15px;color:var(--muted)}
.top3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:10px 0 6px;text-align:left}
@media (max-width:860px){.top3{grid-template-columns:1fr}}
.pick{border:1px solid var(--line);border-radius:14px;padding:18px;background:#fff;display:flex;flex-direction:column}
.pick.first{border:2px solid var(--accent);box-shadow:0 6px 20px rgba(31,91,216,.10)}
.pick .rank{font-size:13px;font-weight:800;color:var(--muted)}
.pick .best{display:inline-block;background:var(--accent-soft);color:var(--accent-d);font-weight:800;font-size:13px;border-radius:999px;padding:3px 10px;margin:6px 0}
.pick h2,.pick h3{font-size:21px;margin:4px 0 6px}
.pick p{font-size:15.5px;margin:0 0 12px;flex:1}
.pick .price{font-weight:700;font-size:15px;margin-bottom:12px}
.pick .btn{width:100%;white-space:normal;text-align:center}
.hub-groups{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px;margin:22px 0}
.hub-group{border:1px solid var(--line);border-radius:14px;padding:18px 20px;background:#fff}
.hub-group h2,.hub-group h3{margin:0 0 6px;font-size:21px}
.hub-group p{font-size:15.5px;color:var(--muted);margin:0 0 10px}
.hub-group ul{margin:0;padding-left:18px}
.hub-group li{margin:5px 0}
.calc{border:1px solid var(--line);border-radius:14px;padding:18px;background:var(--soft);margin:22px 0}
.calc label{display:block;font-weight:600;font-size:15px;margin:8px 0 4px}
.calc input{width:100%;font-size:17px;padding:10px 12px;border:1px solid #c9d1dc;border-radius:8px}
.calc .row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media (max-width:560px){.calc .row{grid-template-columns:1fr}}
.calc output{display:block;margin-top:14px;font-weight:700;font-size:18px;background:#fff;border-radius:10px;padding:12px;border:1px solid var(--line)}
/* footer */
.site-footer{background:#f3f5f8;border-top:1px solid var(--line);margin-top:56px;font-size:15px}
.ft{max-width:var(--frame);margin:0 auto;padding:34px 20px 26px;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:24px}
@media (max-width:820px){.ft{grid-template-columns:1fr 1fr}}
@media (max-width:480px){.ft{grid-template-columns:1fr}}
.ft h2{font-size:16px;margin:0 0 8px}
.ft ul{list-style:none;padding:0;margin:0}
.ft li{margin:6px 0}
.ft a{color:var(--ink);text-decoration:none}
.ft a:hover{text-decoration:underline}
.disclosure{max-width:var(--frame);margin:0 auto;padding:0 20px 28px;color:var(--muted);font-size:14px}
.disclosure p{border-top:1px solid var(--line);padding-top:16px;margin:0 0 6px}
/* popup */
.pop-overlay{position:fixed;inset:0;background:rgba(15,23,38,.55);z-index:300;display:flex;align-items:center;justify-content:center;padding:16px}
.pop-overlay[hidden]{display:none}
.pop{background:#fff;border-radius:18px;max-width:440px;width:100%;max-height:calc(100vh - 32px);max-height:calc(100dvh - 32px);overflow-y:auto;padding:22px 22px 20px;position:relative;box-shadow:0 20px 60px rgba(0,0,0,.25);text-align:center}
.pop h2{font-size:23px;line-height:1.25;margin:6px 0 8px}
.pop p{margin:0 0 14px;color:var(--muted);font-size:16px}
.pop .btn{width:100%;margin-top:8px;white-space:normal}
.pop-x{position:absolute;right:10px;top:10px;width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:#fff;font-size:22px;line-height:1;cursor:pointer;color:var(--ink)}
.pop svg{width:100%;max-width:300px;height:auto;display:block;margin:4px auto 0}
body.pop-lock{overflow:hidden}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
.muted{color:var(--muted)}
.small{font-size:15px}
.center{text-align:center}
.gloss{margin:0 0 1.4em}.gloss dt{font-weight:700;margin-top:1em;color:var(--ink)}.gloss dd{margin:.25em 0 0;padding-left:0}
.az{display:flex;flex-wrap:wrap;gap:6px;list-style:none;padding:0;margin:0 0 1.4em}.az a{display:inline-block;min-width:36px;text-align:center;padding:6px 8px;border:1px solid var(--line);border-radius:8px;text-decoration:none;background:#fff}
pre{max-width:100%;overflow-x:auto;white-space:pre-wrap;word-break:break-all;background:#f4f6fa;border:1px solid var(--line);border-radius:10px;padding:12px 14px;font-size:14px}
#main:focus{outline:none}
code{overflow-wrap:anywhere;word-break:break-word}
.content p,.content li,.content dd{overflow-wrap:break-word}
.art-img{margin:6px 0 22px}
.art-img img{display:block;width:100%;max-width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;border-radius:14px;background:#eef1f6;box-shadow:0 1px 3px rgba(15,23,42,.08)}