:root{--navy:#07111f;--ink:#102033;--muted:#667386;--line:#dbe2ea;--paper:#f5f7fa;--orange:#ff6b2c;--max:1100px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#fff;font:16px/1.9 "Noto Sans JP",sans-serif}a{color:inherit;text-decoration:none}.site-header{height:76px;padding:0 max(24px,calc((100vw - var(--max))/2));display:flex;align-items:center;justify-content:space-between;color:#fff;background:var(--navy)}.brand{display:flex;gap:10px;align-items:center}.brand-mark{width:38px;height:38px;display:grid;place-items:center;color:#fff;background:var(--orange);border-radius:10px;font-size:22px;font-weight:900}.brand b{display:block;font-size:19px;line-height:1.1;letter-spacing:.08em}.brand small{display:block;font-size:11px;letter-spacing:.2em;opacity:.65}.site-header nav{display:flex;align-items:center;gap:25px;font-size:14px;font-weight:700}.header-cta{padding:10px 16px;background:var(--orange);border-radius:7px}.breadcrumb{max-width:var(--max);margin:0 auto;padding:24px 24px 0;color:var(--muted);font-size:12px}.breadcrumb a{color:var(--orange)}.article-hero{max-width:var(--max);margin:0 auto;padding:60px 24px 55px;border-bottom:1px solid var(--line)}.kicker{color:var(--orange);font-size:12px;font-weight:800;letter-spacing:.12em}.article-hero h1{max-width:900px;margin:14px 0 22px;font-size:clamp(35px,5vw,58px);line-height:1.35;letter-spacing:-.04em}.article-lead{max-width:760px;color:var(--muted);font-size:18px}.meta{display:flex;gap:18px;margin-top:25px;color:#8a95a3;font-size:12px}.article-layout{max-width:var(--max);margin:0 auto;padding:55px 24px 100px;display:grid;grid-template-columns:minmax(0,730px) 280px;gap:60px}.article-body h2{margin:58px 0 18px;padding-left:18px;border-left:4px solid var(--orange);font-size:29px;line-height:1.45}.article-body h2:first-child{margin-top:0}.article-body h3{margin:36px 0 12px;font-size:21px}.article-body p{margin:0 0 22px}.article-body ul,.article-body ol{margin:0 0 28px;padding-left:25px}.article-body li{margin-bottom:8px}.note{margin:30px 0;padding:22px 24px;background:#fff5ef;border:1px solid #ffd8c5;border-radius:10px}.note strong{color:var(--orange)}.summary{margin-top:55px;padding:28px;background:var(--paper);border-radius:12px}.summary h2{margin-top:0}.side{position:sticky;top:24px;align-self:start}.side-box{padding:24px;background:var(--paper);border-radius:12px}.side-box h2{margin:0 0 14px;font-size:18px}.side-box a{display:block;padding:9px 0;color:var(--muted);border-bottom:1px solid var(--line);font-size:13px}.side-cta{margin-top:18px;padding:24px;color:#fff;background:var(--navy);border-radius:12px}.side-cta h2{margin:0 0 10px;font-size:20px}.side-cta p{color:#b7c1cc;font-size:13px}.button{display:flex;margin-top:18px;padding:13px 15px;align-items:center;justify-content:center;color:#fff;background:var(--orange);border-radius:7px;font-weight:800}.related{max-width:var(--max);margin:0 auto;padding:70px 24px;background:#fff}.related h2{font-size:30px}.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.card{padding:24px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.card span{color:var(--orange);font-size:11px;font-weight:800}.card h3{margin:10px 0;font-size:18px;line-height:1.55}.card p{margin:0;color:var(--muted);font-size:13px}.site-footer{padding:35px max(24px,calc((100vw - var(--max))/2));display:flex;justify-content:space-between;color:#9aa5b2;background:#050b13;font-size:12px}.column-hero{padding-bottom:40px}.column-list{max-width:var(--max);margin:0 auto;padding:20px 24px 100px;display:grid;grid-template-columns:1fr 1fr;gap:18px}.column-list .card{padding:30px;min-height:245px;display:flex;flex-direction:column}.column-list .card b{margin-top:auto;padding-top:20px;color:var(--orange);font-size:13px}
@media(max-width:820px){.site-header nav a:not(.header-cta){display:none}.article-layout{grid-template-columns:1fr}.side{position:static}.card-grid{grid-template-columns:1fr 1fr}.column-list{grid-template-columns:1fr}}@media(max-width:560px){.site-header{height:68px;padding:0 18px}.brand-mark{width:34px;height:34px}.site-header nav{gap:0}.article-hero{padding:40px 20px}.article-hero h1{font-size:35px}.article-lead{font-size:16px}.breadcrumb{padding:18px 20px 0}.article-layout{padding:40px 20px 70px;gap:35px}.article-body h2{font-size:25px}.card-grid{grid-template-columns:1fr}.related{padding:55px 20px}.column-list{padding:10px 20px 70px}.site-footer{padding:30px 20px;display:block}.site-footer span{display:block;margin-top:10px}}