:root{--navy:#1b2a4a;--navy-light:#23407a;--accent:#4f6ef7;--text:#1f2430;--text-sub:#6b7280;--bg:#ffffff;--bg-soft:#f5f7fb;--border:#e5e9f2;--radius:10px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{color:var(--text);background:var(--bg);line-height:1.85;-webkit-font-smoothing:antialiased;font-family:Hiragino Kaku Gothic ProN,Hiragino Sans,Noto Sans JP,Yu Gothic,Meiryo,system-ui,sans-serif}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto}.container{max-width:1080px;margin:0 auto;padding:0 20px}.site-header{border-bottom:1px solid var(--border);background:#fff;position:-webkit-sticky;position:sticky;top:0;z-index:10}.site-header .inner{display:flex;align-items:center;justify-content:space-between;height:64px}.brand{display:flex;align-items:baseline;gap:10px}.brand .logo{font-size:20px;font-weight:800;color:var(--navy);letter-spacing:.02em}.brand .logo-sub{font-size:12px;color:var(--text-sub)}.header-cta{font-size:13px;font-weight:600;color:#fff;background:var(--navy);padding:9px 18px;border-radius:999px;transition:opacity .2s}.header-cta:hover{opacity:.85}.page-hero{background:var(--bg-soft);padding:40px 0 32px;margin-bottom:40px}.page-hero h1{font-size:26px;color:var(--navy)}.page-hero p{color:var(--text-sub);font-size:14px;margin-top:6px}.cat-nav{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 0}.cat-nav a{font-size:13px;padding:6px 14px;border:1px solid var(--border);border-radius:999px;background:#fff;color:var(--text-sub)}.cat-nav a.active,.cat-nav a:hover{background:var(--navy);border-color:var(--navy);color:#fff}.card-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:28px;gap:28px;margin-bottom:64px}@media (max-width:900px){.card-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width:600px){.card-grid{grid-template-columns:1fr}}.card{display:flex;flex-direction:column;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:#fff;transition:box-shadow .2s,transform .2s}.card:hover{box-shadow:0 8px 24px rgba(27,42,74,.12);transform:translateY(-2px)}.card .thumb{aspect-ratio:1200/630;background:var(--bg-soft);object-fit:cover;width:100%}.card .body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:8px;flex:1 1}.card .date{font-size:12px;color:var(--text-sub)}.card h2{font-size:15.5px;line-height:1.6;color:var(--text)}.card .meta{margin-top:auto;display:flex;align-items:center;gap:10px;font-size:12px;color:var(--text-sub)}.badge{display:inline-block;font-size:11px;font-weight:600;color:var(--navy-light);background:#eef2fd;padding:3px 10px;border-radius:4px}.article-header{max-width:760px;margin:40px auto 0;padding:0 20px}.article-header h1{font-size:28px;line-height:1.5;color:var(--navy);margin:14px 0}.article-header .meta{display:flex;align-items:center;gap:14px;font-size:13px;color:var(--text-sub);margin-bottom:24px}.article-eyecatch{max-width:760px;margin:0 auto 36px;padding:0 20px}.article-eyecatch img{border-radius:var(--radius);width:100%}.article-body{max-width:760px;margin:0 auto 72px;padding:0 20px;font-size:16px}.article-body h2{background:var(--navy-light);color:#fff;font-size:20px;line-height:1.5;padding:12px 18px;border-radius:6px;margin:44px 0 20px}.article-body h3{font-size:18px;color:var(--navy);border-left:4px solid var(--navy-light);padding-left:12px;margin:36px 0 14px}.article-body p{margin:0 0 1.2em}.article-body ol,.article-body ul{margin:0 0 1.4em;padding-left:1.6em}.article-body li{margin-bottom:.4em}.article-body img{border-radius:8px;margin:8px 0 20px}.article-body a{color:var(--accent);text-decoration:underline}.article-body blockquote{border-left:4px solid var(--border);background:var(--bg-soft);padding:14px 18px;margin:0 0 1.4em;border-radius:0 8px 8px 0;color:var(--text-sub)}.article-body hr{border:none;border-top:1px solid var(--border);margin:36px 0}.article-body table{border-collapse:collapse;width:100%;margin:0 0 1.6em;font-size:14.5px}.article-body td,.article-body th{border:1px solid var(--border);padding:9px 12px;text-align:left}.article-body th{background:var(--bg-soft)}.article-cta{max-width:760px;margin:0 auto 80px;padding:28px 24px;background:var(--navy);border-radius:var(--radius);color:#fff;text-align:center}.article-cta p{font-size:15px;margin-bottom:16px}.article-cta a{display:inline-block;background:#fff;color:var(--navy);font-weight:700;padding:12px 32px;border-radius:999px;font-size:14px}.site-footer{border-top:1px solid var(--border);background:var(--bg-soft);padding:32px 0;font-size:13px;color:var(--text-sub)}.site-footer .inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}.site-footer nav{display:flex;gap:18px}.site-footer a:hover{color:var(--navy)}