:root { --ink:#112a5e; --ink-soft:#39516f; --paper:#fbfcfd; --line:#d9e2e8; --mist:#eff4f6; --coral:#be5a38; --green:#4f756d; --sans:"Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, system-ui, sans-serif; --serif:"Yu Mincho", "Hiragino Mincho ProN", serif; }
* { box-sizing:border-box; }
.sr-only { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }
html { scroll-behavior:smooth; }
body { margin:0; color:var(--ink); background:var(--paper); font-family:var(--sans); font-size:16px; line-height:1.95; }
a { color:inherit; }
.skip-link { position:fixed; left:12px; top:10px; z-index:10; transform:translateY(-150%); background:var(--ink); color:#fff; padding:8px 12px; font-size:13px; text-decoration:none; }
.skip-link:focus { transform:translateY(0); }
.site-header { position:sticky; top:0; z-index:5; background:rgba(251,252,253,.94); border-bottom:1px solid var(--line); backdrop-filter:blur(14px); }
.nav { max-width:1160px; min-height:68px; padding:0 26px; margin:auto; display:flex; align-items:center; justify-content:space-between; gap:22px; }
.brand { display:flex; align-items:center; gap:10px; text-decoration:none; font-weight:700; letter-spacing:.03em; }
.brand img { width:29px; height:29px; border-radius:50%; object-fit:cover; transform:scale(1.12); }
.brand small { display:block; font-size:10px; color:var(--ink-soft); font-weight:500; letter-spacing:.12em; }
.nav-links { display:flex; align-items:center; gap:18px; font-size:13px; }
.nav-links a { color:var(--ink-soft); text-decoration:none; }
.nav-links a:hover, .nav-links a:focus-visible { color:var(--coral); }
.nav-links .contact { border-bottom:1px solid var(--coral); color:var(--ink); }
.wrap { max-width:1160px; padding:0 26px; margin:auto; }
.hero { padding:90px 0 72px; background:#eff4f6; border-bottom:1px solid var(--line); }
.eyebrow { position:relative; margin:0 0 16px; color:var(--green); font-size:12px; font-weight:700; letter-spacing:.13em; text-transform:uppercase; }
h1,h2,h3 { font-family:var(--serif); line-height:1.45; letter-spacing:.04em; }
h1 { position:relative; max-width:850px; margin:0; font-size:clamp(33px,5vw,60px); font-weight:600; }
.hero p:last-child { position:relative; max-width:650px; margin:23px 0 0; color:var(--ink-soft); }
.breadcrumbs { position:relative; margin-top:38px; font-size:12px; color:var(--ink-soft); }
.breadcrumbs a { text-underline-offset:4px; }
.hub { padding:72px 0 96px; }
.intro { max-width:735px; margin:0 0 44px; color:var(--ink-soft); }
.cluster { margin:0 0 54px; }
.cluster-head { display:flex; align-items:baseline; gap:14px; border-bottom:1px solid var(--line); padding-bottom:12px; margin-bottom:3px; }
.cluster-head h2 { margin:0; font-size:26px; }
.cluster-head span { color:var(--green); font-size:12px; letter-spacing:.08em; }
.article-list { margin:0; padding:0; list-style:none; }
.article-list li { border-bottom:1px solid var(--line); }
.article-list a { display:grid; grid-template-columns:105px minmax(0,1fr) 22px; gap:18px; align-items:center; padding:19px 0; text-decoration:none; }
.article-list a:hover h3, .article-list a:focus-visible h3 { color:var(--coral); }
.article-list .meta { color:var(--green); font-size:12px; letter-spacing:.04em; }
.article-list h3 { margin:0; font-family:var(--sans); font-size:17px; line-height:1.65; letter-spacing:0; transition:color .2s ease; }
.arrow { color:var(--coral); font-size:21px; text-align:right; }
.article-hero { padding:70px 0 48px; border-bottom:1px solid var(--line); background:#fff; }
.article-kicker { margin:0 0 17px; color:var(--green); font-size:12px; font-weight:700; letter-spacing:.12em; }
.article-hero h1 { max-width:880px; font-size:clamp(30px,4.4vw,54px); }
.article-summary { max-width:715px; margin:24px 0 0; color:var(--ink-soft); font-size:17px; }
.article-meta { margin:21px 0 0; color:var(--ink-soft); font-size:12px; letter-spacing:.04em; }
.article-layout { display:grid; grid-template-columns:minmax(0,725px) 230px; gap:76px; align-items:start; padding:54px 0 96px; }
.article-main { min-width:0; }
.takeaways { margin:0 0 45px; padding:21px 24px 23px; border-left:3px solid var(--coral); background:var(--mist); }
.takeaways h2 { margin:0 0 10px; font-size:18px; }
.takeaways ul { margin:0; padding-left:1.25em; }
.takeaways li { margin:5px 0; color:var(--ink-soft); font-size:14px; }
.prose h2 { margin:52px 0 14px; font-size:28px; }
.prose p { margin:0 0 18px; }
.prose p + p { margin-top:15px; }
.article-side { position:sticky; top:95px; padding-top:10px; }
.article-side h2 { margin:0 0 10px; font-size:16px; }
.article-side a { display:block; padding:9px 0; border-bottom:1px solid var(--line); color:var(--ink-soft); font-size:13px; line-height:1.65; text-decoration:none; }
.article-side a:hover { color:var(--coral); }
.article-side .side-contact { margin-top:28px; color:var(--ink); border-bottom:1px solid var(--coral); }
.faq { margin-top:56px; padding-top:34px; border-top:2px solid var(--ink); }
.faq h2 { margin:0 0 16px; font-size:27px; }
.faq-item { padding:18px 0; border-bottom:1px solid var(--line); }
.faq-item h3 { margin:0 0 7px; font-family:var(--sans); font-size:16px; letter-spacing:0; }
.faq-item p { margin:0; color:var(--ink-soft); font-size:15px; }
.article-sources { margin-top:48px; padding:24px; border:1px solid var(--line); background:var(--mist); }
.article-sources h2 { margin:0 0 12px; font-size:21px; }
.article-sources p { margin:0 0 10px; color:var(--ink-soft); font-size:13px; }
.article-sources ul { margin:0; padding-left:20px; }
.article-sources li + li { margin-top:8px; }
.article-sources a { color:var(--ink); font-size:14px; font-weight:700; overflow-wrap:anywhere; text-underline-offset:4px; }
.author-box { display:grid; grid-template-columns:88px minmax(0,1fr); gap:22px; margin-top:54px; padding:24px; border:1px solid var(--line); background:linear-gradient(135deg,#fff 0%,var(--mist) 100%); }
.author-box img { width:88px; height:88px; border-radius:50%; object-fit:cover; object-position:50% 18%; }
.author-box .author-kicker { margin:0 0 3px; color:var(--green); font-size:11px; font-weight:700; letter-spacing:.14em; text-transform:uppercase; }
.author-box h2 { margin:0; font-size:21px; }
.author-box h2 span { margin-left:7px; color:var(--ink-soft); font-family:var(--sans); font-size:13px; font-weight:400; }
.author-box p { margin:8px 0 10px; color:var(--ink-soft); font-size:14px; }
.author-box ul { display:flex; flex-wrap:wrap; gap:7px 16px; margin:0 0 8px; padding:0; list-style:none; color:var(--ink); font-size:12px; }
.author-box a { color:var(--ink); font-size:13px; font-weight:700; text-underline-offset:4px; }
.article-cta { margin-top:54px; padding:29px 0 0; border-top:1px solid var(--line); }
.article-cta h2 { margin:0 0 10px; font-size:25px; }
.article-cta p { max-width:620px; margin:0 0 17px; color:var(--ink-soft); }
.button-link { display:inline-flex; align-items:center; gap:10px; border-bottom:1px solid var(--coral); color:var(--ink); font-weight:700; text-decoration:none; }
.related { margin-top:66px; padding-top:30px; border-top:1px solid var(--line); }
.related h2 { margin:0 0 10px; font-size:24px; }
.related a { display:flex; justify-content:space-between; gap:20px; padding:13px 0; border-bottom:1px solid var(--line); color:var(--ink); font-size:15px; text-decoration:none; }
.related a span:first-child { flex:1; min-width:0; white-space:normal; overflow-wrap:anywhere; }
.related a:hover { color:var(--coral); }
.related a > span:last-child { color:var(--green); font-size:12px; white-space:nowrap; }
.site-footer { border-top:1px solid var(--line); background:#fff; }
.footer-inner { max-width:1160px; padding:32px 26px; margin:auto; display:flex; justify-content:space-between; gap:24px; color:var(--ink-soft); font-size:12px; }
.footer-inner a { color:var(--ink); text-underline-offset:4px; }
@media (max-width:760px) { .nav { min-height:62px; padding:0 18px; }.nav-links { gap:12px; font-size:12px; }.nav-links a:not(.contact) { display:none; }.wrap { padding:0 20px; }.hero { padding:62px 0 55px; }.hub { padding:50px 0 70px; }.article-list a { grid-template-columns:1fr 18px; gap:12px; }.article-list .meta { grid-column:1 / -1; grid-row:1; }.article-list h3 { grid-column:1; grid-row:2; }.article-list .arrow { grid-column:2; grid-row:2; }.article-hero { padding:50px 0 38px; }.article-layout { display:block; padding:38px 20px 72px; }.article-side { display:none; }.prose h2 { margin-top:39px; font-size:24px; }.article-summary { font-size:16px; }.footer-inner { display:block; padding:26px 20px; }.footer-inner p { margin:7px 0 0; } }
@media (max-width:760px) { .author-box { grid-template-columns:64px minmax(0,1fr); gap:16px; padding:20px; }.author-box img { width:64px; height:64px; }.author-box h2 span { display:block; margin:2px 0 0; } }
@media (prefers-reduced-motion:reduce) { html { scroll-behavior:auto; } * { transition:none !important; } }