/* V3: system boundary is always visible; SCC is visually separate, not another local edge. */
.boundary-band{display:grid;grid-template-columns:minmax(130px,.8fr) minmax(200px,1.6fr) minmax(210px,1.2fr);gap:0;margin:0 0 22px;border:1px solid var(--line);background:white;border-radius:10px;overflow:hidden}.boundary-band>div{padding:19px 22px;display:flex;flex-direction:column;gap:9px;min-width:0}.boundary-band small{color:var(--muted);font-size:10px;letter-spacing:1px}.boundary-band b{font-size:19px;font-weight:600;line-height:1.6;overflow-wrap:anywhere}.boundary-band span{font-size:11px;color:var(--muted)}.boundary-upper{background:#f0f7f5;border-left:1px solid var(--line)}.boundary-scc{background:#f0f4fa;border-left:2px dashed #acbdd2}.boundary-scc b{color:#3b658e}.scc-edge{border:1.5px dashed #9aadc7;background:#f0f4fa;min-width:205px}.scc-edge .anchor{color:#3b658e}#nav [data-page="scc"]{border:1px dashed #9db1c744;margin-top:12px}.chain .edge{flex-shrink:0}.info span{overflow-wrap:anywhere}@media(max-width:720px){.boundary-band{grid-template-columns:1fr}.boundary-upper{border-left:0;border-top:1px solid var(--line)}.boundary-scc{border-left:0;border-top:2px dashed #acbdd2}.boundary-band>div{padding:14px 18px}.boundary-band b{font-size:17px}#nav [data-page="scc"]{margin-top:0}}