.article-index,.article-page,.article-not-found{max-width:940px;margin:auto;padding:56px 28px 96px}.article-index>h1,.article-header h1,.article-not-found h1{max-width:800px;margin-top:16px;font:700 clamp(32px,5vw,48px)/1.1 var(--app-font-sans);letter-spacing:-.02em}.article-index>p,.article-intro,.article-not-found>p{max-width:760px;margin-top:20px;color:#475569;font-size:16px;line-height:1.6}.article-breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px 12px;margin-bottom:40px;color:#596579;font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.05em}.article-breadcrumb a{color:var(--brand-blue)}.article-breadcrumb svg{vertical-align:middle}.article-index-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:48px}.article-index-card{min-width:0;padding:28px;background:var(--card);border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow-sm)}.article-index-card h2{margin:12px 0;font:700 24px/1.2 var(--app-font-sans);letter-spacing:-.01em}.article-index-card>p{color:#475569;font-size:15px;line-height:1.6}.article-index-card .text-link{margin-top:20px;color:var(--brand-blue)}.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px 18px;color:#596579;font:600 11px var(--app-font-sans);text-transform:uppercase;letter-spacing:.05em}.article-header{padding-bottom:48px;border-bottom:1px solid var(--border)}.article-contents{margin:40px 0 56px;padding:24px 28px;background:#f8fafc;border-left:3px solid var(--brand-blue);border-radius:0 6px 6px 0}.article-contents strong{font:600 16px var(--app-font-sans);color:var(--ink)}.article-contents ol{margin:12px 0 0;padding-left:20px;columns:2;column-gap:45px}.article-contents li{break-inside:avoid;margin-bottom:8px;color:#475569;font-size:14px}.article-contents a:hover{color:var(--brand-blue);text-decoration:underline;text-underline-offset:3px}.article-body{max-width:760px}.article-section{padding:0 0 56px;scroll-margin-top:24px}.article-section h2,.article-related h2{margin-bottom:20px;font:700 28px/1.2 var(--app-font-sans);letter-spacing:-.02em}.article-section h3{margin:28px 0 12px;font:600 20px var(--app-font-sans)}.article-section p,.article-section li{color:#334155;font-size:16px;line-height:1.7}.article-section p+p{margin-top:16px}.article-section ul,.article-section ol{margin:16px 0 0;padding-left:24px}.article-section li{margin-bottom:8px;padding-left:4px}.article-formula,.article-example{margin-top:28px;padding:24px 28px;background:#f8fafc;border-left:3px solid var(--brand-blue);border-radius:0 6px 6px 0}.article-example{background:var(--paper);border-color:var(--brand-blue)}.article-formula>p:first-of-type{color:var(--ink);font:500 18px/1.5 var(--app-font-sans);overflow-wrap:anywhere}.article-assumptions{padding:32px 30px;margin-bottom:56px;background:var(--card);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:8px}.article-faqs details{border-top:1px solid var(--border)}.article-faqs details:last-child{border-bottom:1px solid var(--border)}.article-faqs summary{padding:18px 4px;cursor:pointer;font:600 16px var(--app-font-sans)}.article-faqs details p{padding:0 4px 20px;color:#475569}.article-related{display:grid;grid-template-columns:1fr 1fr;gap:45px;margin-top:24px;padding-top:48px;border-top:1px solid var(--border)}.article-related ul{padding:0;list-style:none}.article-related li+li{margin-top:12px}.article-related a{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 20px;background:var(--card);border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow-sm);transition:border-color .2s,box-shadow .2s}.article-related a:hover{border-color:var(--brand-blue);box-shadow:var(--shadow-md)}.article-related a span{display:grid;gap:4px;color:var(--ink);font-weight:600;font-size:15px}.article-related a small{color:#596579;line-height:1.45;font-size:13px;font-weight:400}.article-not-found .text-link{margin-top:24px;margin-right:22px;color:var(--brand-blue)}@media(max-width:680px){.article-index,.article-page,.article-not-found{padding:32px 18px 64px}.article-index>h1,.article-header h1,.article-not-found h1{font-size:36px;letter-spacing:-.02em}.article-index-list,.article-related{grid-template-columns:1fr}.article-contents ol{columns:1}.article-formula,.article-example,.article-assumptions{padding:20px 18px}}@media(max-width:760px){.article-index,.article-page,.article-not-found{width:calc(100% - 32px);padding:28px 0 44px}.article-index>h1,.article-header h1,.article-not-found h1{font-size:clamp(30px,8vw,38px)}.article-header{padding-bottom:28px}.article-breadcrumb{margin-bottom:24px}.article-index-list{grid-template-columns:1fr;gap:12px;margin-top:28px}.article-index-card{padding:20px 18px}.article-contents{margin:28px 0 36px;padding:20px 18px}.article-section{padding-bottom:36px}.article-section h2,.article-related h2{font-size:25px}.article-formula,.article-example{margin-top:20px}.article-assumptions{margin-bottom:36px}.article-related{grid-template-columns:1fr;gap:24px;padding-top:32px}}@media(max-width:340px){.article-index,.article-page,.article-not-found{width:calc(100% - 24px)}}.article-index,.article-page,.article-not-found{max-width:1184px}.article-header{margin-top:4px;padding:clamp(30px,5vw,48px);color:#f8fafc;background:radial-gradient(circle at 0 0,rgba(59,130,246,.23),transparent 34%),linear-gradient(135deg,#08142f,#102c5b);border:1px solid rgba(148,163,184,.15);border-radius:24px;box-shadow:0 20px 52px #0f172a1f}.article-header .eyebrow,.article-header .article-meta{color:#bcd2ec}.article-header h1{color:#fff;font-size:clamp(40px,5vw,60px)}.article-header .article-intro{color:#d5e3f4}.article-breadcrumb a{color:#2563eb}.article-page .article-breadcrumb{margin-bottom:18px}.article-header .article-breadcrumb{color:#c5d6e8}.article-index>h1{max-width:900px;font-size:clamp(40px,5vw,58px)}.article-index-list{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.article-index-card{padding:26px;border-color:#dce6f0;border-radius:18px;box-shadow:0 10px 28px #0f172a0b;transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease}.article-index-card:first-child{grid-column:span 2;color:#fff;background:radial-gradient(circle at 85% 15%,rgba(45,212,191,.22),transparent 25%),linear-gradient(145deg,#15346a,#0a234a);border-color:transparent}.article-index-card:first-child h2,.article-index-card:first-child .text-link{color:#fff}.article-index-card:first-child>p{color:#d5e3f4}.article-index-card:hover{transform:translateY(-4px);border-color:#a8c3ef;box-shadow:0 18px 38px #0f172a17}.article-contents{border:1px solid #dbe6f2;border-left:4px solid var(--brand-blue);border-radius:14px;background:#f6f9fd}.article-body{max-width:820px}.article-section{padding-bottom:46px}.article-section h2{font-size:30px}.article-formula,.article-example,.article-assumptions{border-radius:16px;border-left-width:4px}.article-assumptions{border-color:#dce6f0;box-shadow:0 10px 28px #0f172a0b}.article-related a{border-color:#dce6f0;border-radius:14px}.article-related a:hover{transform:translateY(-2px);border-color:#a8c3ef}@media(max-width:900px){.article-index-list{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:680px){.article-index-list{grid-template-columns:1fr}.article-index-card:first-child{grid-column:auto}.article-header{padding:26px 20px;border-radius:20px}}