@keyframes _si{from{opacity:0}to{opacity:1}}

.legacy-content .qa-answer {
  background: linear-gradient(135deg, rgba(8,145,178,0.06), rgba(0,102,255,0.05));
  border: 1.5px solid rgba(8,145,178,0.3);
  border-radius: var(--radius); padding: 22px 26px; margin: 4px 0 8px;
}.legacy-content .qa-answer .qa-tag { font-size: 11px; font-weight: 800; letter-spacing: 1px; color: #0891b2; margin-bottom: 8px; }.legacy-content .qa-answer p { font-size: 16.5px; font-weight: 700; color: var(--text); line-height: 1.85; }.legacy-content .qa-answer p b { color: #0891b2; }.legacy-content .pv-demo {
  background: var(--card); border: 1.5px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow-card);
  padding: 22px 24px;
}.legacy-content .pv-toggle-row {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  padding: 12px 16px; margin-bottom: 20px; background: rgba(0,0,0,0.015);
}.legacy-content .pv-toggle-label { font-size: 13.5px; font-weight: 800; color: var(--text); }.legacy-content .pv-toggle-label small { display: block; font-size: 11.5px; font-weight: 600; color: var(--sub); margin-top: 2px; }.legacy-content .pv-switch {
  flex-shrink: 0; width: 52px; height: 28px; border-radius: 999px;
  border: none; cursor: pointer; position: relative;
  background: var(--amber); transition: background 0.25s;
}.legacy-content .pv-switch::after {
  content: ''; position: absolute; top: 3px; left: 27px;
  width: 22px; height: 22px; border-radius: 50%; background: #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,0.25); transition: left 0.25s;
}.legacy-content .pv-switch[aria-pressed="false"] { background: #c4c8cf; }.legacy-content .pv-switch[aria-pressed="false"]::after { left: 3px; }.legacy-content .pv-lane { display: flex; align-items: stretch; gap: 0; }.legacy-content .pv-node {
  flex-shrink: 0; text-align: center; padding: 10px 12px;
  border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  background: var(--card); font-size: 12px; font-weight: 700; color: var(--sub);
  line-height: 1.5; opacity: 0.4; transition: all 0.35s;
  cursor: pointer; font-family: inherit;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
}.legacy-content .pv-node:hover { border-color: rgba(0,102,255,0.4); }.legacy-content .pv-node.lit { opacity: 1; border-color: var(--accent); color: var(--text); box-shadow: 0 2px 10px rgba(0,102,255,0.12); }.legacy-content .pv-node.picked { border-color: var(--cyan); background: rgba(8,145,178,0.06); }.legacy-content .pv-node .pv-ico { font-size: 20px; display: block; margin-bottom: 2px; }.legacy-content .pv-arrow {
  flex: 1; min-width: 18px; height: 3px; align-self: center;
  background: rgba(0,0,0,0.1); border-radius: 2px; position: relative;
  transition: background 0.35s;
}.legacy-content .pv-arrow.lit {
  background: repeating-linear-gradient(90deg, var(--accent) 0 8px, rgba(0,102,255,0.25) 8px 14px);
  background-size: 14px 3px; animation: pvFlow 0.8s linear infinite;
}@keyframes pvFlow{ from { background-position: 0 0; } to { background-position: 14px 0; } }.legacy-content .pv-branches { margin-top: 14px; padding-left: 12%; display: flex; flex-direction: column; gap: 12px; }.legacy-content .pv-branch { display: flex; align-items: center; gap: 0; }.legacy-content .pv-branch .pv-tag {
  flex-shrink: 0; font-size: 11px; font-weight: 800; letter-spacing: 0.5px;
  color: var(--sub); width: 88px;
}.legacy-content .pv-branch.off { opacity: 0.35; filter: grayscale(0.8); }.legacy-content .pv-branch.off .pv-arrow.lit { animation: none; background: rgba(0,0,0,0.1); }.legacy-content .pv-branch .pv-node.lit.warm { border-color: var(--amber); background: rgba(217,119,6,0.05); }.legacy-content .pv-branch .pv-node.lit.safe { border-color: var(--success); background: rgba(22,163,74,0.05); }.legacy-content .pv-note {
  margin-top: 16px; border-top: 1.5px dashed var(--border); padding-top: 14px;
  font-size: 13px; color: var(--sub); line-height: 1.85; min-height: 44px;
}.legacy-content .pv-note b { color: var(--text); }.legacy-content .pv-status { font-size: 12.5px; font-weight: 800; margin-top: 10px; transition: color 0.25s; }.legacy-content .pv-status.on { color: var(--amber); }.legacy-content .pv-status.off { color: var(--success); }.legacy-content .pv-table-wrap { overflow-x: auto; }.legacy-content .pv-table {
  width: 100%; border-collapse: collapse;
  background: var(--card); border: 1.5px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  font-size: 13px; box-shadow: var(--shadow-card);
}.legacy-content .pv-table th, .legacy-content .pv-table td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--border); line-height: 1.7; }.legacy-content .pv-table th { background: rgba(0,0,0,0.025); font-size: 12px; font-weight: 800; color: var(--sub); white-space: nowrap; }.legacy-content .pv-table td:first-child { font-weight: 800; color: var(--text); white-space: nowrap; }.legacy-content .pv-table td { color: var(--sub); }.legacy-content .pv-table td b { color: var(--text); }.legacy-content .pv-table tr:last-child td { border-bottom: none; }.legacy-content .nono-list { display: flex; flex-direction: column; gap: 12px; }.legacy-content .nono-item {
  display: flex; gap: 14px; align-items: flex-start;
  background: var(--card); border: 1.5px solid var(--border);
  border-radius: var(--radius); padding: 16px 20px; box-shadow: var(--shadow-card);
}.legacy-content .nono-item .nn-ico { font-size: 22px; flex-shrink: 0; margin-top: 2px; }.legacy-content .nono-item h4 { font-size: 14.5px; font-weight: 800; color: var(--text); margin-bottom: 3px; }.legacy-content .nono-item p { font-size: 13px; color: var(--sub); line-height: 1.85; }.legacy-content .nono-item p b { color: var(--danger); }.legacy-content .takeaway-box {
  background: linear-gradient(135deg, #eff6ff, #eef2ff);
  border: 1.5px solid #bfdbfe; border-radius: var(--radius);
  padding: 24px 28px; margin-top: 36px;
}.legacy-content .takeaway-box h3 { font-size: 17px; font-weight: 800; color: #1e40af; margin-bottom: 10px; }.legacy-content .takeaway-box ul { list-style: none; padding: 0; margin: 0; }.legacy-content .takeaway-box li {
  font-size: 14.5px; color: #1e3a5f; line-height: 1.8;
  padding: 4px 0 4px 22px; position: relative;
}.legacy-content .takeaway-box li::before {
  content: ''; position: absolute; left: 0; top: 13px;
  width: 8px; height: 8px; border-radius: 50%; background: #3b82f6;
}@media (max-width: 768px){.legacy-content .qa-answer p { font-size: 15px; }.legacy-content .pv-demo { padding: 16px 14px; }.legacy-content .pv-node { padding: 8px 7px; font-size: 10.5px; }.legacy-content .pv-node .pv-ico { font-size: 16px; }.legacy-content .pv-branches { padding-left: 0; }.legacy-content .pv-branch .pv-tag { width: 64px; font-size: 10px; }.legacy-content .pv-table th, .legacy-content .pv-table td { padding: 9px 10px; font-size: 12px; }}