:root{--text-h1:36px;--text-h2:26px;--text-h3:20px;--text-h4:18px;--text-body:17px;--text-body-mobile:16px;--text-lead:19px;--text-label:14px;--text-meta:13px;--text-caption:12px;--text-cta:16px;--text-price:24px;--leading-tight:1.3;--leading-snug:1.5;--leading-normal:1.7;--leading-relaxed:1.85;--weight-regular:400;--weight-medium:500;--weight-semibold:600;--weight-bold:700;--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI",
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p.subtext{font-size:var(--text-body);color:var(--text-muted);margin-bottom:1.25rem}.brand-cta-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem;margin-bottom:1.25rem}@media(max-width:768px){.brand-cta-grid{grid-template-columns:1fr}}.brand-cta-box{background:var(--bg-subtle);border:1px solid var(--border-default);border-radius:var(--radius-md);padding:1.25rem;display:flex;flex-direction:column;justify-content:space-between}.brand-cta-box.featured{border-color:var(--accent);background:#fbfdff;box-shadow:0 0 0 1px var(--accent)}.brand-cta-box .b-name{font-size:18px;font-weight:var(--weight-bold);color:var(--text-primary);margin-bottom:.25rem}.brand-cta-box .b-meta{font-size:var(--text-meta);color:var(--text-muted);margin-bottom:.75rem}.brand-cta-box .b-price{font-family:var(--font-mono);font-size:20px;font-weight:var(--weight-bold);color:var(--accent);margin-bottom:1rem}.sister-site-box{background:var(--bg-subtle);border:1px solid 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span.separator{color:var(--text-faint)}.article-header{margin-bottom:2rem;padding-bottom:1.5rem;border-bottom:1px solid var(--border-default)}.article-title{font-size:var(--text-h1);font-weight:var(--weight-bold);line-height:var(--leading-tight);color:var(--text-primary);margin-bottom:1rem}@media(max-width:768px){.article-title{font-size:28px}}.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:1.25rem;font-size:var(--text-meta);color:var(--text-muted)}.article-meta span{display:inline-flex;align-items:center;gap:.35rem}.article-content{color:var(--text-body);line-height:var(--leading-relaxed);font-size:var(--text-body)}@media(max-width:768px){.article-content{font-size:var(--text-body-mobile)}}.article-content>*+*{margin-top:1.4rem}.article-content h2{font-size:var(--text-h2);font-weight:var(--weight-bold);color:var(--text-primary);line-height:var(--leading-snug);margin-top:2.75rem;margin-bottom:1rem;padding-bottom:.5rem;border-bottom:1px solid 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a.active{color:var(--accent);font-weight:var(--weight-medium)}.brand-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:1.5rem;margin:2rem 0}.brand-card{background:var(--bg-card);border:1px solid var(--border-default);border-radius:var(--radius-lg);padding:1.5rem;display:flex;flex-direction:column;justify-content:space-between;transition:all .2s ease-in-out;position:relative;box-shadow:var(--shadow-card)}.brand-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-elevated);border-color:var(--border-strong)}.brand-card.is-primary{border:2px solid var(--border-primary);background:linear-gradient(180deg,#fffdf8 0%,#ffffff 100%)}.brand-card .brand-header{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:1rem}.brand-card .brand-rank-badge{font-family:var(--font-mono);font-size:13px;font-weight:var(--weight-bold);padding:.2rem 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var(--border-subtle);flex-shrink:0}.speedtest-gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.25rem;margin:1.5rem 0}.speedtest-card{background:var(--bg-card);border:1px solid var(--border-default);border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .2s ease}.speedtest-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-card)}.speedtest-card img{width:100%;height:auto;display:block;border-bottom:1px solid var(--border-subtle)}.speedtest-card .test-caption{padding:.75rem 1rem;font-size:var(--text-label);color:var(--text-body);background:var(--bg-subtle)}.hub-hero{background:linear-gradient(180deg,#f8fafc 0%,#ffffff 100%);border:1px solid var(--border-default);border-radius:var(--radius-lg);padding:2.5rem 2rem;margin-bottom:2.5rem}.hub-hero h1{font-size:var(--text-h1);color:var(--text-primary);margin-bottom:1rem;line-height:var(--leading-tight)}.hub-hero .hub-subtitle{font-size:var(--text-lead);color:var(--text-muted);line-height:var(--leading-snug);max-width:820px}.ascii-tree-container{background:#111827;color:#f3f4f6;border-radius:var(--radius-md);padding:1.5rem;margin:2rem 0;overflow-x:auto;box-shadow:var(--shadow-elevated)}.ascii-tree-container .tree-header{font-size:var(--text-caption);color:#9ca3af;text-transform:uppercase;letter-spacing:.08em;margin-bottom:.75rem;border-bottom:1px solid #374151;padding-bottom:.4rem}.ascii-tree-container pre{background:0 0;border:none;padding:0;margin:0;font-family:var(--font-mono);font-size:14px;line-height:1.45;color:#e5e7eb;white-space:pre}.knowledge-graph-box{background:var(--bg-subtle);border:1px solid var(--border-default);border-radius:var(--radius-md);padding:1.5rem;margin:2rem 0}.knowledge-graph-box h4{font-size:var(--text-h4);color:var(--text-primary);margin-bottom:1rem}.knowledge-tags-cloud{display:flex;flex-wrap:wrap;gap:.6rem}.knowledge-tag{background:var(--bg-card);border:1px solid var(--border-default);padding:.35rem .75rem;border-radius:var(--radius-sm);font-size:var(--text-meta);color:var(--text-body)}.hub-subtopics-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.25rem;margin:1.5rem 0 2.5rem}.subtopic-nav-card{background:var(--bg-card);border:1px solid var(--border-default);border-radius:var(--radius-md);padding:1.25rem;transition:all .15s ease}.subtopic-nav-card:hover{border-color:var(--accent);box-shadow:var(--shadow-sm)}.subtopic-nav-card h4{font-size:17px;margin-bottom:.5rem}.subtopic-nav-card h4 a{color:var(--text-primary)}.subtopic-nav-card h4 a:hover{color:var(--accent)}.subtopic-nav-card p{font-size:var(--text-meta);color:var(--text-muted);line-height:var(--leading-snug);margin-bottom:.75rem}.featured-articles-list{list-style:none;display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:1rem;margin:1.5rem 0}.featured-article-card{background:var(--bg-card);border:1px solid var(--border-default);border-radius:var(--radius-md);padding:1rem 1.25rem}.featured-article-card h5{font-size:16px;font-weight:var(--weight-semibold);margin-bottom:.4rem}.featured-article-card h5 a{color:var(--text-primary)}.featured-article-card h5 a:hover{color:var(--accent)}.featured-article-card p{font-size:var(--text-meta);color:var(--text-muted);margin-bottom:0}.faq-accordion{margin:2rem 0}.faq-item{background:var(--bg-card);border:1px solid var(--border-default);border-radius:var(--radius-md);margin-bottom:1rem;padding:1.25rem 1.5rem}.faq-question{font-size:18px;font-weight:var(--weight-bold);color:var(--text-primary);margin-bottom:.6rem;display:flex;align-items:center;gap:.5rem}.faq-question::before{content:"Q";display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;background:var(--accent-subtle);color:var(--accent);border-radius:50%;font-size:13px;font-weight:var(--weight-bold)}.faq-answer{font-size:var(--text-body);color:var(--text-body);line-height:var(--leading-normal);padding-left:2rem}.tldr{background:var(--bg-highlight);border:1px solid #bfdbfe;border-left:4px solid var(--accent);padding:1.25rem 1.5rem;margin:1.75rem 0;border-radius:0 var(--radius-md)var(--radius-md)0;font-size:var(--text-body);line-height:var(--leading-relaxed);color:var(--text-primary)}.tldr-header{display:flex;align-items:center;gap:.5rem;margin-bottom:.75rem;padding-bottom:.5rem;border-bottom:1px solid #dbeafe}.tldr-badge{display:inline-block;background:var(--accent);color:#fff;font-size:11px;font-weight:700;padding:.15rem .5rem;border-radius:3px;letter-spacing:.05em;line-height:1.2}.tldr-title{color:var(--accent);font-size:15px;font-weight:700;letter-spacing:.02em}.tldr-content{font-size:var(--text-body);line-height:var(--leading-relaxed);color:var(--text-body)}.tldr-content p{margin:.4rem 0}.tldr-content ol,.tldr-content ul{margin:.5rem 0;padding-left:1.4rem}.tldr-content li{margin:.35rem 0;line-height:var(--leading-normal)}.tldr strong,.tldr-content strong{display:inline!important;color:var(--text-primary)!important;font-weight:var(--weight-bold)!important;font-size:inherit!important;text-transform:none!important;letter-spacing:normal!important;margin:0!important;padding:0!important}.tldr code,.tldr-content code{font-family:var(--font-mono);font-size:.9em;background:rgba(37,99,235,8%);color:var(--accent);padding:.15em .35em;border-radius:4px}.answer-block{background:var(--bg-subtle);border:1px solid var(--border-default);border-left:4px solid var(--accent);padding:1.1rem 1.35rem;margin:1.25rem 0;border-radius:0 6px 6px 0;font-size:var(--text-body);line-height:var(--leading-relaxed);color:var(--text-body)}.answer-block::before{content:"⚡ 直接答案";display:block;font-size:12px;font-weight:700;color:var(--accent);letter-spacing:.03em;margin-bottom:.5rem}.answer-block strong{display:inline!important;color:var(--text-primary)!important;font-weight:var(--weight-bold)!important;font-size:inherit!important;text-transform:none!important}.table-wrapper{width:100%;overflow-x:auto;margin:1.5em 0;border:1px solid var(--border-default);border-radius:var(--radius-md);background:var(--bg-card)}.data-table{width:100%;border-collapse:collapse;font-size:14px;border:none}.data-table th{background:var(--bg-subtle);font-weight:600;text-align:left;padding:.75em 1em;border-bottom:1px solid var(--border-default);color:var(--text-primary);font-size:13px;position:sticky;top:0;z-index:2;white-space:nowrap}.data-table td{padding:.75em 1em;border-bottom:1px solid var(--border-subtle);color:var(--text-body);white-space:nowrap}.data-table tr:last-child td{border-bottom:none}.data-table tr:hover td{background-color:var(--bg-subtle)}.data-table td.numeric,.numeric{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-weight:var(--weight-medium)}.data-sources-box{background:var(--bg-subtle);border:1px solid var(--border-default);border-radius:var(--radius-sm);padding:1rem 1.25rem;margin:2rem 0;font-size:var(--text-meta);color:var(--text-muted);line-height:var(--leading-snug)}.data-sources-box .source-title{font-weight:var(--weight-semibold);color:var(--text-primary);margin-bottom:.35rem;display:flex;align-items:center;gap:.4rem}