/* ---------- long-form article (SEO/GEO) ---------- */
.art-hero{padding:118px 0 42px;border-bottom:1px solid var(--line);background:radial-gradient(ellipse at 20% 0%,rgba(76,201,240,.09),transparent 62%)}
.art-crumb{display:flex;gap:9px;flex-wrap:wrap;align-items:center;font-size:12.5px;color:var(--muted);margin-bottom:22px}
.art-crumb a{color:var(--ice);opacity:.85}.art-crumb a:hover{opacity:1;text-decoration:underline}
.art-hero h1{font-size:clamp(30px,4.2vw,52px);line-height:1.1;letter-spacing:-.025em;font-weight:800;max-width:960px;margin:6px 0 18px}
.art-dek{font-size:clamp(16px,1.5vw,19px);color:var(--muted);max-width:760px;line-height:1.62}
.art-meta{display:flex;flex-wrap:wrap;gap:8px 16px;align-items:center;margin-top:26px;font-size:13px;color:var(--muted)}
.art-meta b{color:var(--text);font-weight:600}
.art-meta .dot{opacity:.45}
.art-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:64px;align-items:start;padding:56px 0 40px}
@media(max-width:1020px){.art-grid{grid-template-columns:1fr;gap:36px}}
.art-body{max-width:760px;font-size:16.5px;line-height:1.78;color:#dfe7f5}
.art-body p{margin:0 0 20px}
.art-body h2{font-size:clamp(24px,2.6vw,32px);line-height:1.2;letter-spacing:-.02em;font-weight:800;color:var(--text);margin:52px 0 18px;scroll-margin-top:92px}
.art-body h3{font-size:clamp(18px,1.8vw,21px);font-weight:700;color:var(--text);margin:34px 0 12px;scroll-margin-top:92px}
.art-body ul,.art-body ol{margin:0 0 22px;padding-left:22px}
.art-body li{margin:0 0 9px}
.art-body li::marker{color:var(--cyan)}
.art-body strong{color:#fff;font-weight:650}
.art-body a{color:var(--ice);text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(168,230,255,.35)}
.art-body a:hover{text-decoration-color:var(--cyan)}
.art-body code{background:rgba(76,201,240,.1);border:1px solid rgba(76,201,240,.18);border-radius:5px;padding:1px 6px;font-size:.9em}
.art-answer{border-left:3px solid var(--cyan);background:linear-gradient(90deg,rgba(76,201,240,.11),rgba(76,201,240,.02));border-radius:0 12px 12px 0;padding:22px 26px;margin:0 0 34px}
.art-answer .aa-lbl{display:block;font-size:12.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--cyan);margin-bottom:9px;font-weight:700}
.art-answer p{margin:0;font-size:16.5px;color:#eaf3ff}
.art-answer p+p{margin-top:10px}
.art-toc{border:1px solid var(--line);border-radius:14px;padding:18px 22px;margin:0 0 40px;background:var(--panel)}
.art-toc .tb{font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin-bottom:12px}
.art-toc ol{margin:0;padding-left:18px;font-size:14px;line-height:1.55}
.art-toc li{margin:0 0 7px}.art-toc a{color:#cfe2f7;text-decoration:none}.art-toc a:hover{color:var(--cyan)}
.art-body table{width:100%;border-collapse:collapse;margin:22px 0 26px;font-size:14px;background:var(--panel);border:1px solid var(--line);border-radius:12px;overflow:hidden;display:table}
.art-body th{background:rgba(76,201,240,.09);color:var(--ice);text-align:left;font-weight:650;font-size:13.5px;letter-spacing:.05em;text-transform:uppercase;padding:11px 14px;border-bottom:1px solid var(--line)}
.art-body td{padding:11px 14px;border-bottom:1px solid rgba(27,39,64,.7);color:#dbe5f4;vertical-align:top}
.art-body tr:last-child td{border-bottom:none}
.art-body blockquote{margin:26px 0;padding:4px 0 4px 22px;border-left:2px solid rgba(76,201,240,.45);color:#c3d4ea;font-style:italic}
.art-callout{border:1px solid rgba(230,37,47,.3);background:rgba(230,37,47,.07);border-radius:12px;padding:18px 22px;margin:26px 0}
.art-callout .cl{display:block;font-size:13.5px;letter-spacing:.12em;text-transform:uppercase;color:#ff9aa1;font-weight:700;margin-bottom:7px}
.art-callout p{margin:0;font-size:15px}
.art-note{border:1px solid var(--line);background:var(--panel);border-radius:12px;padding:18px 22px;margin:26px 0}
.art-note .cl{display:block;font-size:13.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--cyan);font-weight:700;margin-bottom:7px}
.art-note p{margin:0;font-size:15px}
.art-faq{margin:16px 0 0}
.art-faq details{border-top:1px solid var(--line);padding:16px 0}
.art-faq summary{cursor:pointer;font-weight:650;color:var(--text);font-size:16.5px;list-style:none;display:flex;gap:10px;align-items:flex-start}
.art-faq summary::-webkit-details-marker{display:none}
.art-faq summary::before{content:"+";color:var(--cyan);font-weight:700;flex:0 0 auto;line-height:1.5}
.art-faq details[open] summary::before{content:"–"}
.art-faq .fa{margin:12px 0 0 22px;color:#cdd9ec;font-size:15.5px}
.art-src{margin:44px 0 0;border-top:1px solid var(--line);padding-top:22px;font-size:13.5px;color:var(--muted)}
.art-src h2{font-size:15px!important;letter-spacing:.02em;margin:0 0 12px!important}
.art-src ul{padding-left:18px;margin:0}
.art-src li{margin-bottom:7px}
.art-author{display:flex;gap:16px;align-items:flex-start;border:1px solid var(--line);background:var(--panel);border-radius:14px;padding:20px 22px;margin:34px 0 0}
.art-author .aa-badge{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--cyan),#2b7fb8);display:flex;align-items:center;justify-content:center;font-weight:800;color:#04121d;flex:0 0 auto;font-size:15px}
.art-author h4{margin:0 0 6px;font-size:15px;color:var(--text)}
.art-author p{margin:0;font-size:13.5px;color:var(--muted);line-height:1.6}
.art-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:18px}
@media(max-width:1020px){.art-side{position:static}}
.art-card{border:1px solid var(--line);background:var(--panel);border-radius:14px;padding:20px 20px 22px}
.art-card .lbl{font-size:13.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin-bottom:10px;display:block}
.art-card h4{margin:0 0 10px;font-size:16px;color:var(--text);line-height:1.35}
.art-card p{margin:0 0 14px;font-size:13px;color:var(--muted);line-height:1.6}
.art-card a.btnline{display:inline-flex;align-items:center;gap:7px;background:var(--cyan);color:#04121d;font-weight:700;font-size:13px;padding:9px 15px;border-radius:999px;text-decoration:none}
.art-card ul{list-style:none;margin:0;padding:0;font-size:13.5px}
.art-card li{margin:0 0 10px;line-height:1.5}
.art-card li a{color:#cfe2f7;text-decoration:none}
.art-card li a:hover{color:var(--cyan)}
.art-foot{border-top:1px solid var(--line);padding:44px 0 70px}
.art-foot .rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:22px}
@media(max-width:860px){.art-foot .rel-grid{grid-template-columns:1fr}}
.art-foot .rel{border:1px solid var(--line);border-radius:12px;padding:16px 18px;background:var(--panel)}
.art-foot .rel span{font-size:13.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan)}
.art-foot .rel h4{margin:7px 0 0;font-size:14.5px;line-height:1.4;color:var(--text);font-weight:600}
.art-foot .rel:hover{border-color:rgba(76,201,240,.4)}
.dd-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:8px}
@media(max-width:900px){.dd-grid{grid-template-columns:1fr}}
.dd-card{border:1px solid var(--line);border-radius:16px;overflow:hidden;background:var(--panel);display:flex;flex-direction:column;transition:transform .3s,border-color .3s}
.dd-card:hover{transform:translateY(-4px);border-color:rgba(76,201,240,.45)}
.dd-card .dimg{aspect-ratio:16/9;overflow:hidden;background:#0a1220}
.dd-card .dimg img{width:100%;height:100%;object-fit:cover}
.dd-card .dbody{padding:18px 20px 20px}
.dd-card .dbody span{font-size:13.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan)}
.dd-card h3{font-size:17px;line-height:1.32;margin:8px 0 8px;color:var(--text)}
.dd-card p{font-size:13px;color:var(--muted);margin:0 0 10px;line-height:1.55}
.dd-card .dmeta{font-size:11.5px;color:var(--muted);opacity:.8}