:root{--aqua:#67c7d4;--ink:#253b40;--muted:#667a7e;--line:#dce7e9;--paper:#fff;--wash:#f3f7f7}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--wash);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;font-size:16px;line-height:1.95}a{color:#217887;text-underline-offset:4px}a:hover{color:#104a54}a:focus-visible,summary:focus-visible{outline:3px solid var(--aqua);outline-offset:5px}.prototype-banner{padding:7px 24px;background:#243e44;color:#fff;text-align:center;font-size:11px;letter-spacing:.13em}.prototype-banner span{margin-left:20px;letter-spacing:.04em}.site-header{max-width:1180px;margin:auto;min-height:140px;display:flex;align-items:center;gap:28px;padding:24px}.site-logo{text-decoration:none;font-family:Georgia,serif;font-size:38px;font-weight:700;color:var(--ink);letter-spacing:-1.5px}.site-logo span{color:#399baa}.site-header p{color:var(--muted);font-size:10px;letter-spacing:.18em}.site-header nav{margin-left:auto;display:flex;gap:24px;font-size:12px}.layout{max-width:1180px;display:grid;grid-template-columns:minmax(0,850px) 250px;gap:32px;margin:0 auto;padding:0 24px 70px}.post{min-width:0;background:var(--paper);border-top:5px solid var(--aqua);padding:34px 44px}.breadcrumbs{display:flex;gap:12px;flex-wrap:wrap;font-size:11px;color:var(--muted)}.article-intro{padding:24px 0 26px}.eyebrow{font-size:10px;font-weight:700;letter-spacing:.18em;color:#338493;margin:0 0 12px}.article-intro h1{font-size:28px;line-height:1.65;letter-spacing:.02em;margin:0 0 18px;overflow-wrap:anywhere}.dates{font-size:11px;color:var(--muted);margin:0}.dates span{margin-left:20px}.hero{width:100%;height:auto;display:block;margin:0 0 32px}.toc{padding:24px 28px;background:#f4fafa;border:1px solid #d4e9eb;margin:26px 0 42px}.toc summary{cursor:pointer;font-size:15px;font-weight:700}.toc ol{list-style:none;padding:12px 0 0;margin:0;max-height:420px;overflow:auto}.toc li{font-size:12px;line-height:1.65;margin:8px 0}.toc .level-3{padding-left:14px}.toc .level-4{padding-left:28px}.toc a{color:#385d65;text-decoration:none}.toc a:hover{text-decoration:underline}.article-body{overflow-wrap:anywhere}.article-body p{margin:0 0 1.7em}.article-body h2{font-size:23px;background:#e8f5f7;border-left:5px solid var(--aqua);padding:16px 20px;margin:64px 0 26px;line-height:1.7}.article-body h3{font-size:20px;border-bottom:3px solid var(--aqua);padding-bottom:12px;margin:48px 0 24px;line-height:1.7}.article-body h4{font-size:18px;border-left:3px solid var(--aqua);padding-left:14px;margin:36px 0 20px;line-height:1.7}.article-body img{max-width:100%;height:auto;vertical-align:middle}.article-body .aligncenter{display:block;margin:24px auto}.article-body .alignleft{float:left;margin:10px 20px 10px 0}.article-body .alignright{float:right;margin:10px 0 10px 20px}.article-body .original-image-link{cursor:zoom-in}.article-body .marker,.article-body .marker1{background:linear-gradient(transparent 80%,#87cefa 80%)}.article-body .marker2{background:linear-gradient(transparent 60%,#ff0 60%)}.article-body [class*=simple-box],.article-body [class*=concept-box]{border:2px solid #88bdc5;border-radius:4px;background:#f8fcfc;padding:22px 26px;margin:28px 0}.article-body [class*=box] p:last-child{margin-bottom:0}.article-body blockquote{margin:28px 0;padding:14px 24px;border-left:4px solid #bfd0d4;background:#f5f7f7;color:#51666b}.article-body ul,.article-body ol{padding-left:1.6em;margin:20px 0}.article-body li{padding-left:.2em;margin:.5em 0}.table-scroll{overflow-x:auto;max-width:100%;margin:26px 0;border:1px solid var(--line);border-radius:3px}.article-body table{border-collapse:collapse;width:100%;font-size:13px;margin:0!important;max-width:100%}.article-body td,.article-body th{border:1px solid #d2dfe2;padding:10px 12px;min-width:76px;vertical-align:top;line-height:1.8}.article-body th{background:#eaf4f5}.article-body tr:nth-child(even) td{background:#f6f9f9}.jin-icon-arrowsquare{display:inline-flex;width:1em;height:1em;border:1.5px solid currentColor;border-radius:2px;margin:0 .3em;vertical-align:baseline;align-items:center;justify-content:center}.jin-icon-arrowsquare::before{content:'↗';font-size:.85em;line-height:1}.external-disabled{color:#487981;text-decoration:underline dotted;cursor:not-allowed}.embed-notice{display:block;border:1px dashed #c3d3d6;background:#f6f9f9;border-radius:3px;margin:12px 0;padding:10px 14px;color:#697f84;font-size:11px;line-height:1.7}.kaerebalink-box{padding:18px;border:1px solid var(--line);margin:24px 0}.article-end{border-top:1px solid var(--line);margin-top:64px;padding-top:24px;display:flex;justify-content:space-between;gap:16px;font-size:11px}.article-end span{color:var(--muted);letter-spacing:.12em}.sidebar{padding:34px 4px}.sidebar h2{font-size:22px;line-height:1.8;margin:0 0 18px}.sidebar p:not(.eyebrow):not(.stat){font-size:12px;color:var(--muted)}.stat{font-family:Georgia,serif;font-size:54px;color:#338493;line-height:1.2;border-top:1px solid var(--line);margin:24px 0;padding-top:24px}.stat span{display:block;font-family:inherit;font-size:10px;color:var(--muted);margin-top:10px}.sidebar nav{display:grid;border-top:1px solid var(--line);margin-bottom:22px}.sidebar nav a{padding:15px 0;border-bottom:1px solid var(--line);font-size:12px;text-decoration:none;line-height:1.7}.sidebar [aria-current=page]{font-weight:700;color:var(--ink)}.sidebar small{display:block;font-size:10px;line-height:1.8;color:var(--muted)}.site-footer{max-width:1132px;margin:auto;border-top:1px solid var(--line);padding:28px 24px 45px;display:flex;justify-content:space-between;gap:20px;font-size:10px;color:var(--muted)}.site-footer a{color:inherit;text-decoration:none}.preview-home{max-width:1132px;margin:20px auto 90px;padding:0 24px}.preview-home>h1{font-size:42px;line-height:1.6;letter-spacing:.02em;margin:0 0 20px}.preview-home>p:not(.eyebrow){font-size:13px;color:var(--muted)}.preview-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:45px}.preview-card{background:white;border-top:4px solid var(--aqua);color:var(--ink);text-decoration:none;transition:transform .2s,box-shadow .2s}.preview-card:hover{transform:translateY(-5px);box-shadow:0 10px 25px #234b4f12}.preview-card img{width:100%;height:190px;object-fit:cover;display:block}.preview-card>div{padding:24px;position:relative}.preview-card h2{font-size:17px;line-height:1.7;margin:10px 0 20px}.preview-card p{font-size:10px;overflow-wrap:anywhere;color:var(--muted);padding-right:20px}.card-arrow{position:absolute;right:22px;bottom:22px;color:#338493;font-size:24px}@media(max-width:900px){.layout{display:block;max-width:850px}.sidebar{display:none}.site-header{min-height:115px}.post{padding:28px 36px}.preview-cards{gap:16px}}@media(max-width:600px){body{font-size:15px;line-height:1.95}.prototype-banner{font-size:9px;padding:7px 8px;letter-spacing:.07em}.prototype-banner span{margin-left:8px;font-size:9px}.site-header{padding:22px 20px;min-height:100px;gap:10px;flex-wrap:wrap}.site-logo{font-size:31px}.site-header>p{font-size:8px;margin-left:auto}.site-header nav{margin-left:0;width:100%;gap:18px;font-size:11px}.layout{padding:0 12px 42px}.post{padding:22px 12px;border-top-width:4px}.article-intro{padding:22px 4px}.article-intro h1{font-size:22px;line-height:1.65}.dates{font-size:10px}.dates span{margin-left:12px}.hero{margin-bottom:24px}.breadcrumbs{padding:0 4px}.toc{padding:18px;margin:22px 0 32px}.article-body h2{font-size:20px;padding:14px 14px;margin-top:46px}.article-body h3{font-size:18px}.article-body h4{font-size:16px}.article-body [class*=simple-box],.article-body [class*=concept-box]{padding:16px}.article-body td,.article-body th{padding:8px;font-size:12px}.article-body .alignleft,.article-body .alignright{float:none;display:block;margin:22px auto}.site-footer{flex-direction:column;font-size:9px;padding:24px}.preview-home{padding:0 24px;margin-top:14px}.preview-home>h1{font-size:32px}.preview-cards{grid-template-columns:1fr;margin-top:30px}.preview-card img{height:auto;max-height:240px;object-fit:cover}.preview-card h2{font-size:19px}.preview-card>div{padding:24px}}
/* Legacy affiliate markup uses nested layout tables; preserve its text without fixed-width clipping. */
.article-body .affiliate-table{border:0}.article-body .affiliate-table td{border:0;background:transparent!important;min-width:0}.article-body .affiliate-table div[style*="width:624px"]{width:100%!important;max-width:100%}.article-body .external-disabled [style*="cursor:pointer"]{cursor:not-allowed!important}@media(max-width:600px){.article-body .affiliate-table,.article-body .affiliate-table tbody,.article-body .affiliate-table tr,.article-body .affiliate-table td{display:block!important;width:100%!important;max-width:100%}.article-body .affiliate-table div[style*="float:right"]{float:none!important;width:auto!important;max-width:220px;margin:12px 0!important}.article-body .affiliate-table td{padding:6px}.article-body .affiliate-table div[style*="margin:15px"]{margin:10px 0!important}}
.main-nav{max-width:1132px;margin:0 auto 28px;display:flex;flex-wrap:wrap;gap:10px 22px;padding:0 24px 22px;border-bottom:1px solid var(--line);font-size:11px}.main-nav a{text-decoration:none}.archive-home h1{font-size:30px;margin:24px 0}.archive-home .preview-cards{margin-top:28px}.pagination{display:flex;gap:8px;flex-wrap:wrap;margin:40px 0}.pagination a{border:1px solid var(--line);padding:6px 13px;text-decoration:none;background:white;font-size:13px}.pagination [aria-current=page]{background:#247f8d;color:white}.term-directory{list-style:none;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.term-directory li{background:white;padding:18px 20px;display:flex;justify-content:space-between;gap:8px}.term-directory span{font-size:10px;color:var(--muted)}.article-taxonomy{display:flex;flex-wrap:wrap;gap:8px;margin:28px 0}.article-taxonomy a{font-size:11px;background:#eff7f8;padding:5px 10px;text-decoration:none}.article-taxonomy .tag{background:#f4f5f5}.related,.comments{border-top:1px solid var(--line);padding-top:28px;margin-top:40px}.related>h2,.comments>h2{font-size:19px}.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.related-grid a{font-size:12px;text-decoration:none;line-height:1.7}.related-grid img{width:100%;aspect-ratio:1.6;object-fit:cover;display:block;margin-bottom:10px}.comment{border:1px solid var(--line);padding:18px 20px;margin:18px 0;background:#fafcfc;overflow-wrap:anywhere}.comment header{font-size:12px}.comment time,.comment-parent{font-size:10px;margin-left:10px}.comment-body{font-size:14px;margin-top:14px}.comment-body p:last-child{margin-bottom:0}.comment-note{font-size:11px;color:var(--muted)}.comment.depth-1,.comment.depth-2,.comment.depth-3,.comment.depth-4,.comment.depth-5,.comment.depth-6{margin-left:24px;border-left:3px solid #8ac4ce}.static-product{padding:16px 20px;border:1px solid var(--line);background:#f6fafa;margin:18px 0;font-size:13px}.article-body [data-original-embed-fallback]{font-size:11px;color:var(--muted)}.article-body [class^=kaisetsu-box]{padding:22px 24px;margin:28px 0;border:2px solid #8ac4ce;border-radius:4px;background:#f4fafa}.article-body .box-title{font-size:16px;font-weight:bold;color:#246e7b;margin-bottom:12px}.jin-icon-link,.jin-icon-amazon{display:inline-block;min-width:1em;margin:0 .2em;vertical-align:baseline}.jin-icon-link::before{content:'↗'}.jin-icon-amazon::before{content:'a';font-weight:bold;font-family:Georgia,serif}.protected-notice{padding:20px;background:#f4fafa;border:1px solid var(--line)}@media(max-width:750px){.term-directory{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:600px){.main-nav{padding:0 20px 18px;margin-bottom:18px;gap:8px 18px;font-size:10px}.archive-home h1{font-size:25px}.related-grid{gap:12px}.related-grid a{font-size:10px}.comment{padding:14px}.comment.depth-1,.comment.depth-2,.comment.depth-3,.comment.depth-4,.comment.depth-5,.comment.depth-6{margin-left:12px}.comment-body{font-size:13px}.term-directory{grid-template-columns:1fr}.article-body [class^=kaisetsu-box]{padding:16px}.term-directory li{padding:14px 18px}}