:root{--bg:#fbfaf7;--fg:#1f2328;--muted:#5c6570;--line:#e3e0d8;--accent:#0b6e8f;--accent-2:#e8f3f7;--warn:#fff7e6;--good:#eef8ef;--card:#ffffff;--max:880px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font-family:"Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic","Noto Sans JP",system-ui,-apple-system,sans-serif;line-height:1.85;font-size:16px;-webkit-text-size-adjust:100%}
a{color:var(--accent)}
img{max-width:100%;height:auto}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
header.site{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:56px;flex-wrap:wrap;padding-block:8px}
.brand{font-weight:700;text-decoration:none;color:var(--fg);font-size:1.05rem}
.brand small{display:block;font-weight:400;color:var(--muted);font-size:.72rem;line-height:1.3}
nav.main{display:flex;gap:4px;flex-wrap:wrap}
nav.main a{text-decoration:none;color:var(--fg);font-size:.86rem;padding:6px 10px;border-radius:6px}
nav.main a:hover,nav.main a[aria-current]{background:var(--accent-2);color:var(--accent)}
.hero{padding:44px 0 28px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,#fff 0%,var(--bg) 100%)}
.hero h1{font-size:clamp(1.5rem,4.5vw,2.2rem);line-height:1.35;margin:0 0 12px}
.hero p.lead{font-size:1.05rem;color:var(--muted);margin:0 0 18px}
.meta{color:var(--muted);font-size:.85rem;margin:0 0 8px}
.breadcrumb{font-size:.82rem;color:var(--muted);margin:14px 0 0}
.breadcrumb ol{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:6px}
.breadcrumb li+li:before{content:"›";margin-right:6px;color:#aaa}
main{padding:28px 0 56px}
article h2{font-size:1.4rem;margin:44px 0 14px;padding-left:12px;border-left:5px solid var(--accent);line-height:1.4}
article h3{font-size:1.12rem;margin:30px 0 10px}
article h4{font-size:1rem;margin:20px 0 6px}
article p{margin:0 0 16px}
article ul,article ol{padding-left:1.4em;margin:0 0 16px}
article li{margin:4px 0}
.toc{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px 20px;margin:0 0 24px}
.toc strong{display:block;margin-bottom:6px}
.toc ol{margin:0;padding-left:1.3em}
.toc li{margin:2px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px 22px;margin:18px 0}
.card h3{margin-top:0}
.card .facts{display:grid;grid-template-columns:7.5em 1fr;gap:4px 12px;font-size:.92rem;margin:10px 0 12px}
.card .facts dt{color:var(--muted);font-weight:600}
.card .facts dd{margin:0}
.pros-cons{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:10px 0}
.pros-cons>div{border-radius:8px;padding:10px 14px;font-size:.92rem}
.pros{background:var(--good)}
.cons{background:var(--warn)}
.pros-cons strong{display:block;margin-bottom:4px}
.pros-cons ul{margin:0;padding-left:1.2em}
.note{background:var(--accent-2);border-left:4px solid var(--accent);padding:12px 16px;border-radius:0 8px 8px 0;margin:16px 0;font-size:.93rem}
.caution{background:var(--warn);border-left:4px solid #e0a300;padding:12px 16px;border-radius:0 8px 8px 0;margin:16px 0;font-size:.93rem}
.cta{background:#fff;border:2px solid var(--accent);border-radius:14px;padding:22px 24px;margin:32px 0;text-align:center}
.cta p{margin:0 0 12px}
.cta .btn{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;font-weight:700;padding:12px 26px;border-radius:999px;font-size:1rem}
.cta .btn:hover{background:#08546e}
.cta small{display:block;color:var(--muted);margin-top:10px;font-size:.8rem}
.table-wrap{overflow-x:auto;margin:16px 0 22px;-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;width:100%;min-width:640px;font-size:.88rem;background:#fff}
th,td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
th{background:#f2f0ea;font-weight:700;white-space:nowrap}
tbody tr:nth-child(even){background:#faf9f6}
.tag{display:inline-block;font-size:.74rem;padding:1px 8px;border-radius:999px;background:#eee;margin-right:4px;color:#444}
.tag.one{background:#dcefe0}.tag.two{background:#e3ecfa}.tag.group{background:#f5e6d3}.tag.video{background:#ece3f5}.tag.self{background:#f9e0e0}
.faq details{background:#fff;border:1px solid var(--line);border-radius:8px;padding:10px 16px;margin:8px 0}
.faq summary{font-weight:700;cursor:pointer}
.faq details p{margin:8px 0 4px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin:16px 0}
.grid a.tile{display:block;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px;text-decoration:none;color:var(--fg)}
.grid a.tile:hover{border-color:var(--accent)}
.grid a.tile strong{display:block;color:var(--accent);margin-bottom:4px}
.grid a.tile span{font-size:.88rem;color:var(--muted)}
.sources{font-size:.82rem;color:var(--muted);border-top:1px dashed var(--line);padding-top:12px;margin-top:36px}
.sources ul{padding-left:1.2em}
footer.site{border-top:1px solid var(--line);background:#fff;padding:24px 0;font-size:.82rem;color:var(--muted)}
footer.site nav{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:8px}
footer.site a{color:var(--muted)}
@media (max-width:640px){.pros-cons{grid-template-columns:1fr}.card .facts{grid-template-columns:6em 1fr}nav.main a{font-size:.8rem;padding:5px 7px}}