@keyframes _si{to{opacity:1}}

.legacy-content .layer-stack {display:flex;flex-direction:column;gap:0;margin-top:8px}.legacy-content .layer-item {border:1.5px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--card);box-shadow:var(--shadow-card);transition:all .3s;cursor:pointer}.legacy-content .layer-item+.layer-item {margin-top:-1px}.legacy-content .layer-item:hover {z-index:2;box-shadow:0 8px 24px rgba(0,0,0,.1)}.legacy-content .layer-header {display:flex;align-items:center;gap:12px;padding:16px 20px;transition:background .2s}.legacy-content .layer-icon {width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0;font-weight:800;color:#fff}.legacy-content .layer-title {flex:1}.legacy-content .layer-title h3 {font-size:16px;font-weight:800;color:var(--text);margin:0}.legacy-content .layer-title p {font-size:13px;color:var(--sub);margin:2px 0 0}.legacy-content .layer-arrow {font-size:18px;color:var(--sub);transition:transform .3s;flex-shrink:0}.legacy-content .layer-item.open .layer-arrow {transform:rotate(180deg)}.legacy-content .layer-body {max-height:0;overflow:hidden;transition:max-height .4s ease,padding .3s;padding:0 20px}.legacy-content .layer-item.open .layer-body {max-height:300px;padding:0 20px 18px}.legacy-content .layer-body-inner {border-top:1px solid var(--border);padding-top:14px;font-size:14px;color:var(--sub);line-height:1.7}.legacy-content .layer-body-inner code {background:rgba(0,102,255,.08);padding:2px 6px;border-radius:4px;font-size:13px;font-family:'SF Mono',Menlo,monospace}.legacy-content .layer-body-inner ul {margin:8px 0 0;padding-left:18px}.legacy-content .layer-body-inner li {margin-bottom:4px}.legacy-content .mess-demo {background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius);padding:20px;margin-top:8px;box-shadow:var(--shadow-card)}.legacy-content .mess-demo h4 {font-size:15px;font-weight:800;color:var(--danger);margin:0 0 10px;display:flex;align-items:center;gap:6px}.legacy-content .mess-blob {background:var(--surface-soft);border-radius:8px;padding:14px;font-size:12px;font-family:'SF Mono',Menlo,monospace;color:var(--muted);line-height:1.7;max-height:120px;overflow:hidden;position:relative}.legacy-content .mess-blob::after {content:'';position:absolute;bottom:0;left:0;right:0;height:40px;background:linear-gradient(135deg, #e9f0e6 0%, #fffefa 100%)}.legacy-content .mess-blob .hl-id {color:var(--muted)}.legacy-content .mess-blob .hl-env {color:var(--muted)}.legacy-content .mess-blob .hl-tool {color:var(--muted)}.legacy-content .mess-blob .hl-act {color:var(--muted)}.legacy-content .mess-caption {font-size:13px;color:var(--sub);margin-top:10px;line-height:1.6}.legacy-content .benefit-grid {display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:8px}@media(max-width:768px){.legacy-content .benefit-grid {grid-template-columns:1fr}}.legacy-content .benefit-card {background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow-card)}.legacy-content .benefit-card .b-icon {font-size:22px;margin-bottom:8px}.legacy-content .benefit-card h4 {font-size:14px;font-weight:800;color:var(--text);margin:0 0 4px}.legacy-content .benefit-card p {font-size:13px;color:var(--sub);line-height:1.6;margin:0}.legacy-content .takeaway {background:rgba(0,102,255,.04);border:1.5px solid rgba(0,102,255,.18);border-radius:var(--radius);padding:16px 20px;font-size:15px;color:var(--text);display:flex;gap:10px;line-height:1.7;margin-top:20px}.legacy-content .takeaway b {color:var(--accent)}

.legacy-content .xa-tldr {margin:18px 0 4px;padding:14px 18px;background:rgba(0,102,255,0.04);border:1px solid rgba(0,102,255,0.16);border-radius:10px}.legacy-content .xa-tldr .xa-tldr-tag {display:block;font-size:11px;font-weight:800;letter-spacing:1px;color:var(--accent,#0066ff);margin-bottom:6px}.legacy-content .xa-tldr p {margin:0;font-size:15px;line-height:1.8;color:var(--text,#1f2937)}