:root{--up:#d92d20;--down:#12805c;--tier-vintage:#b45309;--tier-modern:#0e7490;--tier-current:#6d28d9;--radius:12px;--radius-sm:8px}.article-wrap{max-width:780px;margin:0 auto;padding:34px 22px 8px}.article-breadcrumb{font-size:12px;color:var(--sub);margin-bottom:18px}.article-breadcrumb a{color:var(--sub);text-decoration:none}.article-breadcrumb a:hover{color:var(--key)}.article-title{font-size:30px;font-weight:800;line-height:1.42;letter-spacing:-.02em;margin:0 0 16px}.article-lead p{font-size:15px;color:#4b5561;line-height:1.95;margin:0 0 8px}.article-meta{display:flex;flex-wrap:wrap;gap:6px 16px;font-size:12px;color:var(--sub);margin:20px 0 0;padding:14px 0 22px;border-bottom:1px solid var(--line)}.article-meta a{color:var(--key)}.toc{background:var(--tint);border:1px solid var(--line);border-radius:var(--radius);padding:20px 24px;margin:28px 0 40px}.toc-label{font-size:12px;font-weight:800;color:var(--sub);letter-spacing:.1em;margin-bottom:10px}.toc ol{list-style:none;counter-reset:toc-num;padding:0;margin:0}.toc li{counter-increment:toc-num;padding:5px 0;font-size:14px;line-height:1.6}.toc li:before{content:counter(toc-num) ".";color:var(--key);font-weight:800;margin-right:8px;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.toc a{color:var(--ink);text-decoration:none;border-bottom:1px solid transparent}.toc a:hover{color:var(--key);border-bottom-color:var(--key)}.article-body h2{font-size:22px;line-height:1.5;letter-spacing:-.02em;margin:52px 0 16px;padding-left:13px;border-left:4px solid var(--key)}.article-body h2,.article-body h3{font-weight:800;scroll-margin-top:96px}.article-body h3{font-size:17px;line-height:1.6;margin:32px 0 10px}.article-body p{margin:0 0 9px;font-size:15px;line-height:1.95;color:#2b333d}.article-body p.gap{margin-bottom:20px}.article-body strong{font-weight:800;color:var(--ink)}.article-body a{color:var(--key)}.article-body ul{margin:12px 0 20px;padding-left:20px}.article-body li{margin-bottom:9px;font-size:15px;line-height:1.9;color:#2b333d}.h2-lead{background:var(--tint);border-left:3px solid #c9d3e0;border-radius:var(--radius-sm);padding:15px 18px;margin-bottom:22px}.h2-lead p{font-size:14px;color:#4b5561;line-height:1.9;margin:0 0 6px}.h2-lead p:last-child{margin-bottom:0}.formula{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13.5px;background:var(--tint);border:1px solid var(--line);border-radius:var(--radius-sm);padding:15px 16px;margin:12px 0 20px;overflow-x:auto}.faq-item{border-top:1px solid var(--line);padding:20px 0 6px}.faq-q{font-size:16px;font-weight:800;margin-bottom:9px}.faq-q:before{content:"Q. 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th:hover{color:var(--ink)}table.constituents-table th.sort-asc:after{content:" ▲"}table.constituents-table th.sort-desc:after{content:" ▼"}table.constituents-table td{padding:12px 14px;border-bottom:1px solid var(--line);font-size:13px;vertical-align:middle}table.constituents-table tr:last-child td{border-bottom:0}table.constituents-table tr:hover 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