.article-page{max-width:900px;margin:0 auto}.article-page>header{margin-bottom:24px}.article-page h1{font-size:clamp(32px,5vw,48px);letter-spacing:-.045em;margin:8px 0 12px}.article-page header p{color:var(--muted);font-size:17px;line-height:1.75}.article-kicker{font-size:12px;font-weight:850;color:var(--primary)}.article-body{background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:30px}.article-body h2{margin:34px 0 12px;font-size:27px;letter-spacing:-.035em}.article-body h2:first-child{margin-top:0}.article-body h3{margin:24px 0 8px;font-size:20px}.article-body p,.article-body li{line-height:1.85}.article-body ul,.article-body ol{padding-left:22px}.guide-summary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:22px 0}.guide-summary div{padding:18px;border:1px solid var(--line);border-radius:16px;background:var(--soft)}.guide-summary b{display:block;margin-bottom:6px}.guide-table-wrap{overflow-x:auto;margin:18px 0}.guide-table{width:100%;border-collapse:collapse;min-width:640px}.guide-table th,.guide-table td{padding:14px;border:1px solid var(--line);text-align:left;vertical-align:top}.guide-table th{background:var(--soft)}.formula-box{margin:16px 0;padding:20px;border-radius:16px;background:var(--soft);font-weight:750;line-height:1.8}.guide-note{margin:20px 0;padding:18px;border-left:4px solid var(--primary);background:var(--soft);line-height:1.75}.guide-warning{margin:20px 0;padding:18px;border:1px solid #f1d6a8;border-radius:16px;background:#fff8e9;line-height:1.75}.guide-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:22px}.guide-links a{display:block;padding:18px;border:1px solid var(--line);border-radius:16px;background:var(--surface)}.guide-links b{display:block;margin-bottom:7px}.article-cta{margin-top:24px;text-align:center}.article-cta a{display:inline-flex;padding:13px 18px;border-radius:12px;background:var(--primary);color:#fff;font-weight:800}.source-list{margin-top:24px;padding-top:20px;border-top:1px solid var(--line);font-size:14px;color:var(--muted)}.source-list a{text-decoration:underline}.faq-list details{border-top:1px solid var(--line);padding:16px 0}.faq-list details:first-child{border-top:0}.faq-list summary{font-weight:800;cursor:pointer}.faq-list p{margin-bottom:0}@media(max-width:767px){.article-body{padding:22px}.guide-summary{grid-template-columns:1fr}.guide-links{grid-template-columns:1fr}.article-page h1{font-size:34px}}