:root{--ink:#1f2933;--sub:#5b6875;--line:#e4e8ee;--bg:#fbfaf7;--card:#fff;--primary:#1f6f78;--primary-soft:#e3f1f2;--accent:#f08a4b;--accent-soft:#fff1e7;--radius:14px;--font:"Noto Sans JP", "Hiragino Sans", "Yu Gothic UI", "Meiryo", sans-serif}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--ink);font-family:var(--font);letter-spacing:.02em;margin:0;font-size:17px;line-height:1.9}a{color:var(--primary)}img{max-width:100%;height:auto}.container{width:min(1080px,100% - 32px);margin-inline:auto}.main{padding:32px 0 64px}.site-header{border-bottom:1px solid var(--line);background:#fff}.header-inner{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;padding:14px 0;display:flex}.brand{color:var(--ink);align-items:center;gap:10px;text-decoration:none;display:flex}.brand-mark{font-size:28px}.brand-name{font-size:20px;font-weight:700;line-height:1.3;display:block}.brand-tag{color:var(--sub);font-size:12px;line-height:1.4;display:block}.nav{flex-wrap:wrap;gap:6px;display:flex}.nav a{color:var(--ink);border-radius:999px;padding:6px 10px;font-size:14px;text-decoration:none}.nav a:hover{background:var(--primary-soft);color:var(--primary)}.site-footer{color:#d7dee5;background:#22313a;padding:40px 0;font-size:14px}.site-footer a{color:#d7dee5}.footer-inner{gap:14px;display:grid}.footer-brand{color:#fff;margin:0;font-size:17px;font-weight:700}.footer-tag,.footer-operator,.copyright{margin:0}.footer-links{flex-wrap:wrap;gap:18px;display:flex}.copyright{color:#93a1ad;font-size:12px}.section-title{border-left:4px solid var(--primary);margin:40px 0 16px;padding-left:12px;font-size:22px;line-height:1.4}.card-grid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px;display:grid}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);color:var(--ink);padding:20px;text-decoration:none;transition:box-shadow .15s;display:block}.card:hover{box-shadow:0 8px 24px #1f293314}.card-cluster{color:var(--primary);font-size:12px;font-weight:700}.card-title{margin:6px 0;font-size:17px;font-weight:700;line-height:1.6}.card-desc{color:var(--sub);margin:0;font-size:14px;line-height:1.7}.empty{color:var(--sub);background:var(--card);border:1px dashed var(--line);border-radius:var(--radius);padding:24px}.hero{background:linear-gradient(135deg, var(--primary-soft), #fff 70%);border-radius:20px;padding:40px 32px}.hero h1{margin:0 0 12px;font-size:clamp(24px,4vw,36px);line-height:1.5}.hero p{color:var(--sub);max-width:680px;margin:0}.breadcrumb{color:var(--sub);margin-bottom:12px;font-size:13px}.breadcrumb a{color:var(--sub)}.article{background:var(--card);border:1px solid var(--line);border-radius:20px;max-width:820px;margin-inline:auto;padding:clamp(20px,4vw,48px)}.article h1{margin:0 0 12px;font-size:clamp(24px,3.4vw,32px);line-height:1.5}.article-meta{color:var(--sub);flex-wrap:wrap;gap:14px;font-size:13px;display:flex}.article-body h2{background:var(--primary-soft);border-radius:10px;margin:48px 0 16px;padding:10px 14px;font-size:23px;line-height:1.5}.article-body h3{border-bottom:2px solid var(--line);margin:32px 0 10px;padding-bottom:6px;font-size:19px}.article-body table{border-collapse:collapse;width:100%;margin:16px 0;font-size:15px;display:block;overflow-x:auto}.article-body th,.article-body td{border:1px solid var(--line);text-align:left;padding:8px 12px}.article-body th{background:#f4f6f8}.article-body blockquote{border-left:4px solid var(--accent);background:#f7f7f2;margin:16px 0;padding:12px 18px}.article-body pre{white-space:pre-wrap;background:#f6f8fa;border-radius:10px;padding:14px 16px;font-size:15px;line-height:1.8}.article-body code{font-family:inherit}.author-box{border-radius:var(--radius);background:#f7f9fb;align-items:center;gap:14px;margin:20px 0;padding:14px 16px;font-size:14px;display:flex}.author-avatar{background:var(--primary-soft);width:52px;height:52px;color:var(--primary);border-radius:50%;flex-shrink:0;place-items:center;font-weight:700;display:grid;overflow:hidden}.author-avatar img{object-fit:cover;width:100%;height:100%}.author-box p{margin:0;line-height:1.6}.toc{border-radius:var(--radius);background:#f7f9fb;margin:24px 0;padding:16px 20px;font-size:15px}.toc-title{margin:0 0 6px;font-weight:700}.toc ol{margin:0;padding-left:22px}.faq{margin-top:48px}.faq h2{font-size:23px}.faq details{border:1px solid var(--line);background:#fff;border-radius:12px;margin-bottom:10px;padding:12px 16px}.faq summary{cursor:pointer;font-weight:700}.faq summary:before{content:"Q. 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